RMxprt Manual.pdf

Contents-1

Table of Contents

1. Getting Started with RMxprt

Creating a Project and Inserting a New RMxprt Design . . . 1-3 Opening Existing RMxprt Projects and Saving as New . . . 1-4 Opening RMxprt Projects . . . 1-4 Opening Recent RMxprt Projects . . . 1-4 Saving RMxprt Projects . . . 1-4 Saving a New RMxprt Project . . . 1-4 Saving the Active RMxprt Project . . . 1-5 Saving a Copy of an RMxprt Project . . . 1-5 Saving RMxprt Project Data Automatically . . . 1-5 Recovering RMxprt Project Data in an Auto-Save File . . 1-6 RMxprt Files . . . 1-7 Saving Project Notes in RMxprt . . . 1-7 The RMxprt Desktop . . . 1-8 RMxprt Title Bar . . . 1-9 Working with the RMxprt Menu Bar . . . 1-10 Working with the RMxprt Shortcut Menus . . . 1-11 Shortcut Menu in the Toolbars Area . . . 1-11 Shortcut Menus in the Project Manager Window . . . 1-11 Working with the RMxprt Toolbars . . . 1-12 Undoing RMxprt Commands . . . 1-12 Redoing RMxprt Commands . . . 1-12 Working with the RMxprt Status Bar . . . 1-13 Working with the RMxprt Machine Editor Windows . . . 1-13

Setting the Window View . . . 1-14 Printing in RMxprt . . . 1-14 Working with the RMxprt Project Manager . . . 1-15 Working with the RMxprt Project Tree . . . 1-15 Viewing RMxprt Design Details . . . 1-15 Working with the RMxprt Properties Window . . . 1-16 Showing and Hiding the RMxprt Properties Window . . . . 1-16 Working with the RMxprt Progress Window . . . 1-17 Working with the RMxprt Message Manager . . . 1-17 Clearing Messages for the RMxprt Project . . . 1-17 Clearing Messages for the RMxprt Model . . . 1-17 Copying Messages in RMxprt . . . 1-17 Quick Start for RMxprt . . . 1-19 RMxprt Example Part 1: Create a New Project . . . 1-19 RMxprt Example Part 2: Select a Machine . . . 1-19 RMxprt Example Part 3: Input Design Data . . . 1-20 RMxprt Example Part 4: Analyze the Design. . . . 1-28 RMxprt Example Part 5: Create Reports and View Output . . . . 1-29 RMxprt Example Part 6: Output Design Data . . . 1-34

2. Setting Up RMxprt Projects

Setting Up A Machine Model . . . 2-2 Design Settings in RMxprt . . . 2-3 Setting the Material Threshold in RMxprt . . . 2-3 RMxprt Export Options . . . 2-4 Setting User Defined Data File for a Design . . . 2-4 Validating RMxprt Projects . . . 2-6 Setting General Options in RMxprt . . . 2-7 Setting RMxprt Options . . . 2-8 RMxprt Options: General Options Tab . . . 2-8 RMxprt Options: Solver Tab . . . 2-9 RMxprt Options: Export Options Tab . . . 2-9 Setting Machine Options . . . 2-10

Specifying the Material Threshold . . . 2-10 Setting Model Units . . . 2-10 Specifying the Machine Option for Wire Setting . . . 2-10 Editing Wire Data . . . 2-11 Setting Export Options . . . 2-12

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Contents-3

Edit AC Windings . . . 2-14 Enable Winding Editor . . . 2-14 Edit Winding Configuration . . . 2-17 View Winding Connections . . . 2-19 Working with Variables in RMxprt . . . 2-21 Adding a Project Variable in RMxprt . . . 2-21 Adding a Design Variable in RMxprt . . . 2-22 Adding Datasets in RMxprt . . . 2-23 Modifying Datasets in RMxprt . . . 2-23 Defining Mathematical Functions in RMxprt . . . 2-23 Defining an Expression in RMxprt . . . 2-24 Using Valid Operators for Expressions in RMxprt . . . 2-24 Using Intrinsic Functions in Expressions in RMxprt . . . . 2-25 Using Piecewise Linear Functions in Expressions in

RMxprt . . . 2-27 Using Dataset Expressions in RMxprt . . . 2-27 Assigning Variables in RMxprt . . . 2-27 Choosing a Variable to Optimize in RMxprt . . . 2-28 Including a Variable in a Sensitivity Analysis in RMxprt . . . 2-28 Choosing a Variable to Tune in RMxprt . . . 2-29 Including a Variable in a Statistical Analysis in RMxprt . . . 2-29

3. Wire Specification Libraries

Configure Wire Specification Library . . . 3-2 Specify the Wire Setting . . . 3-3 Edit Wire Data . . . 3-5 Edit Round Wire Data . . . 3-6 Edit Rectangular Wire Data . . . 3-7 Wire Shape Limit . . . 3-7 Recommended Wire Sides . . . 3-7 Wire Sides . . . 3-8 Export/Import Wire Data . . . 3-8 Save Wire Data . . . 3-8

4. Working with Materials in RMxprt

Material Library Management for RMxprt . . . 4-2 Soft-Magnetic Materials . . . 4-3 Adding New Materials to an RMxprt Project . . . 4-3

Relative Permittivity for RMxprt Material . . . 4-4 Relative Permeability for an RMxprt Material . . . 4-5

Specifying a BH Curve for Nonlinear Relative

Permeability . . . 4-5 Bulk Conductivity for an RMxprt Material . . . 4-6 Dielectric Loss Tangent for RMxprt Material . . . 4-6 Magnetic Loss Tangent for RMxprt Material . . . 4-7 Magnetic Coercivity for an RMxprt Material . . . 4-7 Core Loss Type for an RMxprt Material . . . 4-7 Calculating Properties for Core Loss in RMxprt (BP Curve) . . . 4-8

Electrical Steel Core Loss from a Single-Frequency

Loss Curve . . . 4-9 Electrical Steel Core Loss from Multi-Frequency

Loss Curves . . . 4-12 Power Ferrite Core Loss from Multi-Frequency

Loss Curves . . . 4-13 Mass Density for RMxprt Material . . . 4-14 Composition for RMxprt Material . . . 4-14 Permanent Magnet Materials in RMxprt . . . 4-15 Nonlinear vs. Linear Permanent Magnets . . . 4-15 Calculating the Properties for a Non-Linear Permanent

Magnet . . . 4-15 Calculating the Properties for a Linear Permanent Magnet . . . . 4-16 Using Demagnetization Curves . . . 4-17 Hysteresis Loop . . . 4-17 Demagnetization Curve . . . 4-18 Recoil Lines . . . 4-19 Recoil Magnetic Permeability . . . 4-20 Inflection Point . . . 4-21 Curve Fitting of Demagnetization Curves . . . 4-21 Three Parameter Curve Fitting . . . 4-22 Four Parameter Curve Fitting . . . 4-24 Conductor Data . . . 4-27 Setting the Material Threshold for RMxprt . . . 4-27 Editing Conductivity Properties in RMxprt . . . 4-27

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Contents-5

5. Specifying RMxprt Solution Settings

Generating a Custom Design Sheet for RMxprt . . . 5-3 Key Words in Output Data for RMxprt . . . 5-3 Creating RMxprt Customized Design Sheet Template . . . 5-5

Design Template of Microsoft Excel Worksheet in

Preferred Styles . . . 5-5 Resort to Key Words in Design Output . . . 5-6 Set Boundary for Data Imported into Worksheet for

RMxprt . . . 5-7 Insert Figures into Template for RMxprt . . . 5-8 Use Different Languages for RMxprt Design Sheets . . . . 5-9 Post-process Data for RMxprt . . . 5-10

6. Running an RMxprt Simulation

Aborting RMxprt Analyses . . . 6-2 Re-solving an RMxprt Problem . . . 6-3

7. Post Processing and Generating Reports in

RMxprt

Viewing RMxprt Solution Data . . . 7-2 Browse Solutions in RMxprt . . . 7-3 Specifying Output Variables in RMxprt . . . 7-4 Adding a New Output Variable in RMxprt . . . 7-4 Building an Expression Using Existing Quantities . . . 7-4 Deleting Output Variables in RMxprt . . . 7-5 Exporting a Maxwell or SIMPLORER Model . . . 7-7 Create a Maxwell Design . . . 7-8 Creating Reports in RMxprt . . . 7-9 Modifying Reports in RMxprt . . . 7-9 Opening All Reports in RMxprt . . . 7-10 Deleting All Reports in RMxprt . . . 7-10 Selecting the Display Type in RMxprt . . . 7-10 Creating 2D Rectangular Plots in RMxprt . . . 7-10 Creating 3D Rectangular Plots in RMxprt . . . 7-11 Creating Data Tables in RMxprt . . . 7-12 Working with Traces in RMxprt . . . 7-13 Removing Traces in RMxprt . . . 7-14

Replacing Traces in RMxprt . . . 7-14 Adding Blank Traces in RMxprt . . . 7-14 Sweeping a Variable in a Report in RMxprt . . . 7-14 Selecting a Function in RMxprt . . . 7-15 Selecting a Parameter, Variable, or Quantity to Plot in

RMxprt . . . 7-19 Creating Quick Reports in RMxprt . . . 7-21 RMxprt Quick Report Categories . . . 7-21

8. Specifying RMxprt Winding Data

Setting the Winding Type . . . 8-2 Winding Types Available for Machines . . . 8-2 Enable the Winding Editor . . . 8-3 Edit Winding Configuration . . . 8-5 Setting the Number of Winding Layers . . . 8-5 Connecting and Disconnecting Windings . . . 8-5 Poly-phase Winding Editor . . . 8-6 Windings Basic Terminology . . . 8-8 Poly Phase AC Winding . . . 8-9 Whole-coiled Windings . . . 8-10 Half-coiled Windings . . . 8-10 Single-Layer Windings . . . 8-10 Lap-type Windings . . . 8-12 Concentric-type Windings . . . 8-14 Double-Layer Windings . . . 8-15 Fractional-Pitch Winding . . . 8-17 Auto-arrangement of AC Windings . . . 8-18 Phase Spread . . . 8-20 Coil Arrangement . . . 8-20 Coil Connections . . . 8-25 Connection of Double-pole Dual-speed Windings . . . 8-29 DC Windings . . . 8-31 Wave Winding . . . 8-32 Frog-leg Winding . . . 8-32 Virtual Slots . . . 8-34 Equipotential Connectors . . . 8-34

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Pole Windings . . . 8-35 Limited Space for Wire Arrangement . . . 8-37 Round Wire Winding . . . 8-38 Cylinder Coil . . . 8-39 Edgewise Coil . . . 8-40 Pole Winding with Half Turns . . . 8-40 Exporting Winding Data . . . 8-42

9. RMxprt Machine Types

Three-Phase Induction Motors . . . 9-2 Analysis Approach for Three-Phase Induction Motors . . . 9-2 Defining a Three-Phase Induction Motor . . . 9-4

Defining the General Data for a Three Phase

Induction Motor . . . 9-4 General Data for Three-Phase Induction Motors . . . 9-5 Defining the Stator Data for a Three-Phase

Induction Motor . . . 9-5 Stator Data for Three-Phase Induction Motors . . . 9-6 Defining the Stator Slots for a Three-Phase

Induction Motor . . . 9-7 Stator Slot Data for Three-Phase Induction Motors . . . 9-7 Defining the Stator Windings for a Three-Phase

Induction Motor . . . 9-8 Stator Winding Data for Three-Phase Induction

Motors . . . 9-13 Stator Vent Data for Three-Phase Induction

Motors . . . 9-16 Defining the Rotor Data for a Three-Phase

Induction Motor . . . 9-16 Rotor Data for Three-Phase Induction Motors . . . 9-17 Defining the Rotor Slots for a Three-Phase

Induction Motor . . . 9-18 Rotor Slot Data for Three-Phase Induction

Motors . . . 9-18 Defining the Rotor Winding for a Three-Phase

Induction Motor . . . 9-19 Rotor Winding for Three-Phase Induction Motors . . . 9-19 Rotor Vent Data for Three-Phase Induction Motors . . . . 9-20 Defining the Shaft Data for a Three-Phase

Induction Motor . . . 9-21 Shaft Data for Three-Phase Induction Motors . . . 9-21 Setting Up Analysis Parameters for a Three-Phase

Induction Motor . . . 9-21 Solution Data for Three-Phase Induction Motors . . . 9-22 Single-Phase Induction Motors . . . 9-23 Analysis Approach for Single-Phase Induction Motors . . . 9-23 Defining a Single-Phase Induction Motor . . . 9-25

Defining the General Data for a Single-Phase

Induction Motor . . . 9-26 General Data for Single-Phase Induction Motors . . . 9-27 Defining the Stator Data for a Single-Phase Induction Motor . . 9-28 Stator Data for Single-Phase Induction Motors . . . 9-29 Defining the Stator Slots for a Single-Phase

Induction Motor . . . 9-29 Stator Slot Data for Single-Phase Induction Motors . . . 9-30

Defining the Stator Windings for a Single-Phase

Induction Motor . . . 9-31 Stator Winding Data for Single-Phase Induction

Motors . . . 9-38 Defining the Rotor Data for a Single-Phase Induction

Motor . . . 9-41 Rotor Data for Single-Phase Induction Motors . . . 9-42 Defining the Rotor Slots for Single-Phase Induction

Motors . . . 9-42 Rotor Slot Data for Single-Phase Induction Motors . . . 9-42 Defining the Rotor Windings for Single-Phase

Induction Motors . . . 9-43 Rotor Winding Data for Single-Phase Induction

Maxwell Online Help

Contents-9

Adding or Removing a Vent from a Single-Phase

Induction Motor . . . 9-44 Defining the Shaft Data for a Single-Phase Induction

Motor . . . 9-44 Shaft Data for Single-Phase Induction Motors . . . 9-44 Setting Up Analysis Parameters for a Single-Phase

Induction Motor . . . 9-45 Solution Data for Single-Phase Induction Motors . . . 9-45 Adjust-Speed Synchronous Machines . . . 9-47

Analysis Approach Data for Adjust-Speed Synchronous

Machines . . . 9-47 Stator Winding Connected to a Sinusoidal AC

Source . . . 9-48 Stator Winding Fed by a DC to AC Inverter . . . 9-51 Defining an Adjustable-Speed Synchronous Motor . . . 9-53

Defining the General Data for an Adjust-Speed

Synchronous Machine . . . 9-54 General Data for Adjust-Speed Synchronous

Machines . . . 9-54 Circuit Data for Adjust-Speed Synchronous

Machines . . . 9-57 Defining the Stator Data for an Adjust-Speed

Synchronous Machine . . . 9-57 Defining the Stator Dimensions and Slots . . . 9-58 Stator Data for Adjust-Speed Synchronous

Machines . . . 9-58 Stator Slot Data for Adjust-Speed Synchronous

Machines . . . 9-59 Defining the Stator Windings and Conductors for

an Adjust-Speed Synchronous Machine . . . 9-59 Stator Winding Data for Adjust-Speed Synchronous

Machines . . . 9-69 Defining the Rotor Data for an Adjust-Speed

Synchronous Machine . . . 9-70 Rotor Data for Adjust-Speed Synchronous Machines . . . 9-71

Defining the Rotor Pole for an Adjust-Speed

Synchronous Machine . . . 9-71 Rotor Pole Data for Adjust-Speed Synchronous

Machines . . . 9-73 Defining the Shaft Data for an Adjust-Speed

Synchronous Machine . . . 9-73 Shaft Data for Adjust-Speed Synchronous Machines . . . 9-73 Setting Up Analysis Parameters for an Adjust-Speed

Synchronous Machine . . . 9-73 Solution Data for Adjust-Speed Synchronous

Machines . . . 9-74 Permanent-Magnet DC Motors . . . 9-76 Analysis Approach for PMDC Motors . . . 9-76 Defining a Permanent-Magnet DC Motor . . . 9-77 Defining the General Data for PMDC Motors . . . 9-77 General Data for PMDC Motors . . . 9-78 Defining the Stator Data for a PMDC Motor . . . 9-78 Stator Data for PMDC Motors . . . 9-79 Defining the Stator Pole for a PMDC Motor . . . 9-79 Stator Pole Data for PMDC Motors . . . 9-80 Defining the Rotor Data for a PMDC Motor . . . 9-81 Rotor Data for PMDC Motors . . . 9-81 Defining the Rotor Slots for a PMDC Motor . . . 9-82 Rotor Slot Data for PMDC Motors . . . 9-82

Defining the Rotor Windings and Conductors for a

PMDC Motor . . . 9-83 Defining Different Size Wires for a PMDC Motor . . . 9-87 Rotor Winding Data for PMDC Motors . . . 9-87 Defining the Commutator and Brush for a PMDC

Motor . . . 9-89 Commutator and Brush Data for PMDC Motors . . . 9-90 Defining the Shaft Data for a PMDC Motor . . . 9-91 Shaft Data for PMDC Motors . . . 9-91 Setting Up Analysis Parameters for a PMDC Motor . . . 9-91 Solution Data for PMDC Motors . . . 9-92

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Contents-11

Three-Phase Synchronous Machines . . . 9-93 Analysis Approach for Three-Phase Synchronous

Machines . . . 9-93 Defining a Three-Phase Synchronous Machine . . . 9-96

Defining the General Data for a Three-Phase

Synchronous Machine . . . 9-97 General Data for Three-Phase Synchronous

Machines . . . 9-97 Defining the Stator for a Three-Phase Synchronous

Machine . . . 9-97 Stator Data for Three-Phase Synchronous Machines . . . 9-98

Defining Stator Slots for a Three-Phase

Synchronous Machine . . . 9-99 Stator Slot Data for Three-Phase Synchronous Machines . . . . 9-99

Defining Stator Windings and Insulation for a

Three-Phase Synchronous Machine . . . 9-100 Stator Winding and Insulation for Three-Phase

Synchronous Machines . . . 9-108 Stator Vent Data for Three-Phase Synchronous

Machines . . . 9-111 Defining the Rotor for a Three-Phase Synchronous

Machine . . . 9-112 Rotor, Rotor Pole, and Insulation for Three-Phase

Synchronous Machines . . . 9-113 Defining the Rotor Pole for a Three-Phase

Synchronous Machine . . . 9-114 Defining the Rotor Winding Data for a Three-Phase

Synchronous Machine . . . 9-115 Rotor Winding Data for Three-Phase Synchronous

Machines . . . 9-117 Defining the Rotor Damper Data . . . 9-117 Damper Data for Three-Phase Synchronous

Machines . . . 9-117 Defining the Shaft Data for a Three-Phase

Synchronous Machine . . . 9-118

Shaft Data for Three-Phase Synchronous

Machines . . . 9-119 Setting Up Analysis Parameters for a Three-Phase

Synchronous Machine . . . 9-119 Solution Data for Three-Phase Synchronous

Machines . . . 9-120 Brushless Permanent-Magnet DC Motors . . . 9-121 Analysis Approach for Brushless PMDC Motors . . . 9-121 Defining a Brushless Permanent-Magnet DC Motor . . . 9-123

Defining the General Data for a Brushless

PMDC Motor . . . 9-123 General Data for Brushless PMDC Motors . . . 9-124

Defining the Circuit Data for a Brushless

PMDC Motor . . . 9-125 Circuit Data for Brushless PMDC Motors . . . 9-126 Defining the Stator Data for a Brushless

PMDC Motor . . . 9-127 Stator Data for Brushless PMDC Motors . . . 9-127 Defining the Stator Slots for a Brushless

PMDC Motor . . . 9-128 Stator Slot Data for Brushless PMDC Motors . . . 9-128

Defining the Stator Windings and Conductors

for a Brushless PMDC Motor . . . 9-129 Defining Different Size Wires for a Brushless

DC Motor . . . 9-138 Stator Winding Data for Brushless PMDC Motors . . . 9-139 Defining the Rotor Data for a Brushless PMDC

Motor . . . 9-140 Rotor Data for Brushless PMDC Motors . . . 9-141 Defining the Rotor Pole for a Brushless PMDC

Motor . . . 9-141 Rotor Pole Data for Brushless PMDC Motors . . . 9-143 Defining the Shaft Data for a Brushless PMDC

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Contents-13

Shaft Data for Brushless PMDC Motors . . . 9-143 Setting Up Analysis Parameters for a Brushless PMDC

Motor . . . 9-143 Analysis Offered . . . 9-144 Solution Data for Brushless PMDC Motors . . . 9-145 Switched Reluctance Motors . . . 9-147 Analysis Approach for Switched Reluctance Motors . . . 9-147 Defining a Switched Reluctance Motor . . . 9-149

Defining the General Data for a Switched

Reluctance Motor . . . 9-150 General Data for Switched Reluctance Motors . . . 9-151 Defining the Circuit Data for a Switched

Reluctance Motor . . . 9-151 Circuit Data for Switched Reluctance Motors . . . 9-153 Defining the Stator Data for a Switched

Reluctance Motor . . . 9-153 Stator Data for Switched Reluctance Motors . . . 9-154 Defining the Stator Winding Data for a Switched

Reluctance Motor . . . 9-154 Defining Different Size Wires for a Switched

Reluctance Motor . . . 9-156 Stator Winding Data for Switched Reluctance

Motors . . . 9-157 Defining the Rotor Data for a Switched

Reluctance Motor . . . 9-157 Rotor Data for Switched Reluctance Motors . . . 9-158 Defining the Shaft Data for a Switched

Reluctance Motor . . . 9-158 Shaft Data for Switched Reluctance Motors . . . 9-159 Setting Up Analysis Parameters for a Switched

Reluctance Motor . . . 9-159 Solution Data for Switched Reluctance Motors . . . 9-159 Line-Start Permanent-Magnet Synchronous Motors . . . 9-161

Analysis Approach for Line-Start PM Synchronous

Motors . . . 9-161

Defining a Line-Start Permanent Magnet Synchronous

Motor . . . 9-163 Defining the General Data for a Line-Start PM

Synchronous Motor . . . 9-164 General Data for Line-Start PM Synchronous

Motors . . . 9-164 Defining the Stator Data for a Line-Start PM

Synchronous Motor . . . 9-164 Stator Data for Line-Start PM Synchronous Motors . . . . 9-165 Defining the Stator Slots for a Line-Start PM

Synchronous Motor . . . 9-166 Stator Slot Data for Line-Start PM Synchronous

Motors . . . 9-166 Defining the Stator Windings and Conductors for

a Line-Start PM Synchronous Motor . . . 9-167 Defining Different Size Wires for a Line-Start

Synchronous Motor . . . 9-170 Stator Winding Data for Line-Start PM Synchronous

Motors . . . 9-171 Optional Vent for Line-Start PM Synchronous

Motor Stator . . . 9-173 Defining the Rotor Data for a Line-Start PM

Synchronous Motor . . . 9-173 Rotor Data for Line-Start PM Synchronous Motors . . . 9-174 Defining the Rotor Pole for a Line-Start PM

Synchronous Motor . . . 9-174 Rotor Pole Data for Line-Start PM Synchronous

Motors . . . 9-175 Optional Rotor Damper for Line-Start PM

Synchronous Motor . . . 9-175 Defining the Shaft Data for a Line-Start PM

Synchronous Motor . . . 9-176 Shaft Data for Line-Start PM Synchronous Motors . . . 9-176

Maxwell Online Help

Contents-15

Setting Up Analysis Parameters for a Line-Start PM

Synchronous Motor . . . 9-176 Solution Data for Line-Start PM Synchronous

Motors . . . 9-177 Universal Motors . . . 9-179 Analysis Approach for Universal Motors . . . 9-179 Defining a Universal Motor . . . 9-180 Defining the General Data for a Universal Motor . . . 9-181 General Data for Universal Motors . . . 9-181 Defining the Stator Data for a Universal Motor . . . 9-182 Stator Data for Universal Motors . . . 9-182 Defining the Stator Pole for a Universal Motor . . . 9-183 Stator Pole Data for Universal Motors . . . 9-185 Defining the Stator Windings and Conductors for

a Universal Motor . . . 9-185 Defining Different Size Wires for a Universal Motor

Stator Winding . . . 9-187 Stator Winding Data for Universal Motors . . . 9-188 Defining the Rotor Data for a Universal Motor . . . 9-188 Rotor Data for Universal Motors . . . 9-189 Defining the Rotor Slots for Universal Motors . . . 9-190 Rotor Slot Data for Universal Motors . . . 9-190

Defining the Rotor Windings and Conductors for

a Universal Motor . . . 9-191 Defining Different Size Wires for a Universal Motor

Rotor Winding . . . 9-195 Rotor Winding Data for Universal Motors . . . 9-195 Defining the Commutator and Brush for a Universal

Motor . . . 9-197 Commutator and Brush Data for Universal Motors . . . 9-198 Defining the Shaft Data for a Universal Motor . . . 9-199 Shaft Data for Universal Motors . . . 9-199 Setting Up Analysis Parameters for a Universal Motor . . . 9-199 Solution Data for Universal Motors . . . 9-200 General DC Machines . . . 9-201

Analysis Approach for General DC Machines . . . 9-201 DC Machine Operating as a Motor . . . 9-202 DC Machine Operating as a Generator . . . 9-203 Defining a General DC Machine . . . 9-204 Defining the General Data for a General DC Machine . . 9-204 General Data for General DC Machines . . . 9-205 Defining the Stator Data for a General DC Machine . . . . 9-205 Stator Data for General DC Machines . . . 9-206 Defining the Stator Pole for a General DC Machine . . . . 9-207 Stator Pole Data for General DC Machines . . . 9-207 Defining the Stator Field Data for a General DC

Machine . . . 9-208 Stator Field Data for General DC Machines . . . 9-208 Shunt Data for General DC Machines . . . 9-208 Series Data for General DC Machines . . . 9-209 Compensating Data for General DC Machines . . . 9-210 Commutating Data for General DC Machines . . . 9-211 Winding Data for Commutating . . . 9-212 Defining the Rotor Data for a General DC Machine . . . . 9-212 Rotor Data for General DC Machines . . . 9-213 Defining the Rotor Slots for a General DC Machine . . . . 9-214 Rotor Slot Data for General DC Machines . . . 9-214 Defining the Rotor Windings and Conductors for a

General DC Machine . . . 9-215 Defining Different Size Wires for a General DC

Machine Rotor Winding . . . 9-219 Rotor Winding Data for General DC Machines . . . 9-219 Vent Data for General DC Machines . . . 9-221 Defining the Commutator and Brush for a General

DC Machine . . . 9-222 Commutator and Brush Data for General

DC Machines . . . 9-223 Defining the Shaft Data for a General DC Machine . . . 9-224

Maxwell Online Help

Contents-17

Shaft Data for General DC Machines . . . 9-224 Setting Up Analysis Parameters for a General DC Machine . . . 9-224 Solution Data for General DC Machines . . . 9-225 Claw-Pole Alternators . . . 9-227 Analysis Approach for Claw-Pole Alternators . . . 9-227 Rotor Equipped with an Excitation Winding . . . 9-228 Rotor Equipped with a Permanent Magnet Only . . . 9-228 Power and Efficiency . . . 9-229 Defining a Claw-Pole Alternator . . . 9-230 Defining the General Data for a Claw-Pole Alternator . . . 9-231 General Data for Claw-Pole Alternators . . . 9-231 Defining the Stator Data for a Claw-Pole Alternator . . . . 9-231 Stator Data for Claw-Pole Alternators . . . 9-232 Defining the Stator Slot Data for a Claw-Pole

Alternator . . . 9-233 Stator Slot Data for Claw-Pole Alternators . . . 9-233 Defining the Stator Winding Data for a Claw-Pole

Alternator . . . 9-234 Stator Winding Data for Claw-Pole Alternators . . . 9-238 Defining the Rotor Data for a Claw-Pole Alternator . . . 9-240 Rotor Data for Claw-Pole Alternators . . . 9-241 Defining the Rotor Pole for a Claw-Pole Alternator . . . 9-241 Rotor Pole Data for Claw-Pole Alternators . . . 9-241 Defining the Shaft Data for a Claw-Pole Alternator . . . 9-242 Shaft Data for Claw-Pole Alternators . . . 9-242 Setting Up Analysis Parameters for a Claw-Pole Alternator . . . 9-242 Solution Data for Claw-Pole Alternators . . . 9-243 Three-Phase Non-Salient Synchronous Machines (NSSM) . . . 9-244

Analysis Approach for Three-Phase Non-Salient

Synchronous Machines . . . 9-244 Defining Three-Phase Non-Salient Synchronous Machines . . . 9-248 Defining the General Data for a Three-Phase NSSM . . . 9-248 Defining the Stator for Three-Phase NSSM . . . 9-249 Define NSSM Rotor Data . . . 9-253 Define NSSM Shaft Data . . . 9-256

Analysis Setup for Three-Phase Non-Salient Synchronous

Machines . . . 9-256 Add Solution Setup for NSSM . . . 9-256 Validate NSSM Solution Setup . . . 9-257 Design Output for Non-Salient Synchronous Machines . . . 9-257 View Performance . . . 9-257 View Design Sheet . . . 9-258 View Curves . . . 9-259 Create Reports . . . 9-263 Transient FEA of the Non-Salient Synchronous Machines . . . . 9-263 Create Maxwell 2D Design . . . 9-264 Review Maxwell2D Design Setups . . . 9-264 Stator Vent Data . . . 9-272 Rotor Vent Data . . . 9-273

Getting Started with RMxprt 1-1

1

Getting Started with RMxprt

Rotational Machine Expert (RMxprt) is an interactive software package used for designing and analyzing electrical machines.

Using RMxprt, you can simulate and analyze the following types of machines:

•

Three-phase and single-phase induction motors.

•

Three-phase synchronous motors and generators.

•

Brushless permanent-magnet DC motors.

•

Adjust-speed synchronous motors and generators.

•

Permanent-magnet DC motors.

•

Switched reluctance motors.

•

Line-start permanent-magnet synchronous motors.

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Universal motors.

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General DC motors and generators.

•

Claw-pole alternators.

When you start a new model in RMxprt, you first select one of the above motor or generator types. You then enter the parameters associated with that machine type in each RMxprt Properties win-dow. The properties windows are accessed by clicking each of the machine elements (for example, stator, rotor, shaft) under Machine in the project tree. General options are available directly at the

Machine level of the project tree. Solution and output options (such as the rated output power) are

set when you add a solution setup (by right-clicking Analysis in the project tree).

Related Topics:

The RMxprt Desktop RMxprt Commands

Setting Up A Machine Model Creating a New RMxprt Project

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Getting Started with RMxprt 1-3

Creating a Project and Inserting a New RMxprt Design

To create a new project: 1. Click File>New.

A new project is listed in the project tree. It is named Projectn by default, where n is the order in which the project was added to the current session.

Project definitions, such as material assignments, are stored under the project name in the project tree.

2. Click Project>Insert RMxprt Design or click the RMxprt icon on the toolbar. The Select Machine Type window appears.

3. Select the machine type you want, and click OK.

You specify the name of the project when you save it using the File>Save or File>Save As com-mands.

Opening Existing RMxprt Projects and Saving as New

You may also create new projects from existing ones, by saving them under new file names. To create a new project from an existing one:

1. If you are already in the existing project, click File>Save As. The Save As window appears. (Otherwise, open the existing project you want to copy first.)

2. Enter a new name for the new project, and click Save.

The new project is now saved, with the same information as the existing project.

Opening RMxprt Projects

Open a previously saved project using the File>Open command. 1. Click File>Open.

The Open dialog box appears.

2. Use the file browser to find the RMxprt version 6 project file.

By default, files that can be opened or translated by RMxprt are displayed. 3. Select the file you want to open.

4. Click OK.

The project information appears in the project tree.

Opening Recent RMxprt Projects

To open a project you recently saved:

•

Click the name of the project file at the bottom of the File menu.

Saving RMxprt Projects

Use the File>Save As command to do the following:

•

Save a new project.

•

Save the active project with a different name or in a different location.

•

Save the active project in another file format for use in another program. Use the File>Save command to save the active project.

Related Topics Saving a New Project Saving the Active Project Saving a Copy of a Project

Saving a New RMxprt Project

1. Click File>Save As.

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Getting Started with RMxprt 1-5

2. Use the file browser to find the directory where you want to save the file. 3. Type the name of the file in the File name box.

By default, all files will have the .mxwl extension. 4. Click Save.

RMxprt saves the project to the location you specified.

Related Topics

Saving the Active Project Saving a Copy of a Project

Saving the Active RMxprt Project

•

Click File>Save.

RMxprt saves the project over the existing one.

Related Topics Saving a New Project Saving a Copy of a Project

Saving a Copy of an RMxprt Project

To save an existing, active project with a new name, a different file extension, or to a new location: 1. Click File>Save As.

2. Use the file browser to find the directory where you want to save the file. 3. Type the name of the file in the File name box.

4. Click Save.

RMxprt saves the project with the new name or file extension to the location you specified.

Related Topics Saving a New Project Saving the Active Project

Saving RMxprt Project Data Automatically

RMxprt stores recent actions you performed on the active project in an auto-save file in case a sud-den workstation crash or other unexpected problem occurs. The auto-save file is stored in the same directory as the project file and is named Projectn.rmpt.auto by default, where n is the order in which the project was added to the current session. RMxprt automatically saves all data for the project to the auto-save file, except solution data. By default, RMxprt automatically saves project data after every ten edits. An "edit" is any action you perform that changes data in the project or the

Warning Be sure to save machine models periodically. Saving frequently helps prevent the loss of your work if a problem occurs. Although RMxprt has an "auto-save" feature,

it may not automatically save frequently enough for your needs.

design, including actions associated with project management, model creation, and solution analy-sis.

With auto-save activated, after a problem occurs, you can choose to re-open the original

project file (Projectn.rmpt) in an effort to recover the solution data or to open the auto-save file. To modify the auto-save settings:

1. Click Tools>Options>General Options. The Options dialog box appears.

2. Under the Project Options tab, verify that Do Autosave is selected. This option is selected by default.

3. In the Autosave interval box, enter the number of edits that you want to occur between automatic saves. By default, this option is set at 10.

4. Click OK to apply the specified auto-save settings.

Once the specified number of edits is carried out, a "model-only" save occurs. This means that RMxprt does not save solutions data or clear any undo/redo history.

When RMxprt auto-saves, an ".auto" extension is appended to the original project file name. For example, Project1.rmpt will automatically be saved as Projectn.rmpt.auto.

Related Topics

Recovering Project Data in an Auto-Save File

Recovering

RMxprt

Project Data in an Auto-Save File

Following a sudden workstation crash or other unexpected problem, you can recover the project data in its auto-save file.

To recover project data in an auto-save file, if RMxprt has unexpectedly crashed: 1. Launch RMxprt from your desktop.

2. Click File>Open,.

3. Select the original Projectn.rmpt project file for which you want to recover its Pro-jectn.rmpt.auto auto-save file.

The Crash Recovery window appears, giving you the option to open the original project file

Note Auto-save always increments forward; therefore, even when you undo a command,

RMxprt counts it as an edit.

Warning When you close or rename a project, RMxprt deletes the auto-save file. RMxprt assumes that you have saved any desired changes at this point.

Warning When you recover a project's auto-save file you cannot recover any solutions data; recovering an auto-save file means you will lose any solutions data that existed in the original project file.

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Getting Started with RMxprt 1-7

or the auto-save file.

4. Select Open project using autosave file to recover project data in the auto-save file, and then click OK. RMxprt replaces the original project file with the data in the auto-save file. RMxprt immediately overwrites the original project file data with the auto-save file data, removing the results directory (solutions data) from the original project file as it overwrites to the auto-save file.

Related Topics

Saving Project Data Automatically

RMxprt Files

When you create any project in the Maxwell desktop, including an RMxprt project, it is given a

.mxwl file extension and stored in the directory you specify. Any files related to that project are

also stored in that directory.

Some common file and folder types are listed below:

Saving Project Notes in RMxprt

You can save notes about a project, such as its creation date and a description of the device being modeled. This is useful for keeping a running log on the project.

To add notes to a project: 1. Click RMxprt>Edit Notes.

The Design Notes dialog box appears. 2. Click in the window and type your notes.

3. Click OK to save the notes with the current project. To edit existing project notes:

1. Double-click the Notes icon in the project tree.

The Design Notes window appears, where you can edit the project's notes. 2. Click OK to save any changes, or click Cancel to exit without saving edits.

Warning If you choose to recover the auto-save file, you cannot recover the original project file that has been overwritten; recovering data in an auto-save file is not reversible.

.mxwl Maxwell or RMxprt project.

project_name.mxwlresults Folder containing results data for a project.

design_name.results Folder containing results data for a design. This folder is stored in the project_name.mxwlresults folder.

design_name.asol Results data for a design. This file's contents may be empty if a solution is unavailable. This file is stored in the

project_name.mxwlresults folder.

The RMxprt Desktop

RMxprt is integrated within the Maxwell desktop. Consistent with the Maxwell desktop, the RMx-prt interface consists of 9 desktop components: a title bar, a menu bar, toolbars, a status bar, a project manager window, a properties window, a message manager window, a progress window, and a machine editor window. The project manager window, the properties window, the message manager window and the progress window are dockable and resizable.

You can open multiple machine editor windows to display different parts at the same time. One can remain fixed on the winding, one on the diagram, and one on the main desktop window. To open a new window, click Window>New Window.

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Getting Started with RMxprt 1-9

To move back and forth between windows, select the Windows menu, and select the window you want to view.

RMxprt Title Bar

The title bar is located at the top of the application window. It displays the information of the active design. If a machine editor window is maximized, its title is appended in the title bar within square brackets. The information of the active design includs the desktop name, the project name, the design name and the design type. For an RMxprt design, the design type is Machine.

Working with the RMxprt Menu Bar

The menu bar enables you to perform all Maxwell, ePhysics, and/or RMxprt tasks, depending on the software you purchased. Such tasks include managing project files, customizing the desktop, drawing objects, and setting and modifying all project parameters.

RMxprt contains the following menus, which appear at the top of the desktop:

Related Topics Getting Help

File menu Use the File menu commands to manage RMxprt project files and printing options.

Edit menu Use the Edit menu commands to modify properties in the active design, manage designs in one or more projects, delete projects, and undo and redo actions.

View menu Use the View menu commands to display or hide desktop components, and change the machine editor window view.

Project menu Use the Project menu commands to add a Maxwell 3D, Maxwell2D, or RMxprt design to the active project, analyze all designs of the active project, and define project variables and datasets.

Machine Use the Machine menu to work with the machine data, such as edit winding layout, edit wire size, and set dimension unit for the active editor window.

RMxprt Use the RMxprt menu commands to validate design input data, analyze designs, set up parameters, add analysis setups, set up Optimetrics, post process solutions, export equivalent circuits, create Maxwell 3D designs, and other design tasks.

Tools menu Use the Tools menu to modify the active project's material library, arrange the material libraries, run and record scripts, update project definitions from libraries, display options, customize the desktop's toolbars, and modify many of the software's default settings.

Window menu Use the Window menu commands to rearrange the application windows and toolbar icons.

Help menu Use the Help menu commands to access the online help system and view the current software version information.

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Getting Started with RMxprt 1-11

Working with the RMxprt Shortcut Menus

A variety of shortcut menus — menus that appear when you right-click a selection — are available in the toolbars area of the desktop, in the Machine Editor window, in the Project Manager win-dow, in the Properties winwin-dow, and in the Message Manager window.

Shortcut Menu in the Toolbars Area

Use the shortcut menu in the toolbars area of the desktop to show or hide windows or toolbars, and customize the toolbars.

To access the shortcut menu in the toolbars area:

•

Right-click in the toolbars area at the top of the desktop.

A check box appears next to a command if the item is visible. For example, if a check box appears next to the Project Manager command, then the Project Manager window is currently visible on the desktop.

Click Customize to open the Customize dialog box, which enables you to modify the toolbar set-tings on the desktop.

Shortcut Menus in the Project Manager Window

Each node, or item, in the project tree has a shortcut menu.

To access the shortcut menu in the Project Manager window, for a particular node:

•

Select a node or item.

•

Right-click in the Project Manager window.

In the toolbars area Use the shortcut menu in the toolbars area of the desktop to show or hide windows or toolbars, and customize the toolbars.

In Machine Editor window

Use the shortcut menu in the Machine Editor window to edit winding layout, display or hidden coil connection, change the view, and copy to Clipboard.

In the Project Manager window

Use the shortcut menus in the Project Manager window (or the project tree) to manage project files and design properties; these commands duplicate menu commands at the top of the screen.

In Properties window Use the shortcut menus in the Properties window to edit (cut, copy, paste or delete) property values.

In Message Manager window

Use the shortcut menus in the Message Manager window to clear, copy message, or see message details.

Note Most of the commands on the shortcut menus are also available on the menu bar.

Working with the RMxprt Toolbars

The toolbar buttons and shortcut pull-down lists act as shortcuts for executing various commands. You can rearrange the position of the various toolbars.

•

To execute a command, click a toolbar button or click a selection on the shortcut pull-down list.

•

To display a brief description of the toolbar button, move the pointer over the button.

•

To relocate a toolbar, click on the left edge of a toolbar and drag it to new location..

Undoing

RMxprt

Commands

Use the Undo command on the Edit menu to cancel, or undo, the last action you performed on the active project or design.

1. In the Project Manager window, do one of the following:

•

To undo the last action you performed on the active project, such as inserting a design, click the project icon.

•

To undo the last action you performed on the active design, click the design icon.

2. Click Edit>Undo.

Your last action is now undone.

Related Topics Redoing Commands

Redoing

RMxprt

Commands

Use the Redo command on the Edit menu to reapply, or redo, the last action that was canceled, or undone. You can redo a canceled action related to project management, model creation, and post-processing.

1. In the Project Manager window, do one of the following:

•

To redo the last action you canceled on the active project, such as inserting a design or adding project variables, click the project icon.

•

To redo the last action you canceled on the active design, such as drawing an object or deleting a field overlay plot, click the design icon.

2. Click Edit>Redo.

Hint To modify the toolbars on the desktop, click Tools>Customize. To display all toolbar

buttons, click the Reset All button in the Customize window.

Note You cannot undo an analysis that you have performed on a model, that is, the RMxprt>Analyze command.

Note When you save a project, RMxprt always clears the entire undo/redo history for the

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Getting Started with RMxprt 1-13

Your last canceled action is now reapplied.

Related Topics Undoing Commands

Working with the RMxprt Status Bar

The status bar is located at the bottom of the application window. It displays information about the where mouse is pointed.

To display or hide the status bar:

•

Click View>Status Bar.

A check box appears next to this command if the status bar is visible.

Working with the RMxprt Machine Editor Windows

You can open multiple machine editor windows in RMxprt. One can remain fixed on the Winding

Editor, one on the Diagram tab, and one on the Main tab. To open a new window, click Win-dow>New Window. To move back and forth between windows, select the Windows menu, and

select the window you want to view.

You can cascade all Machine Editor windows, tile them horizontally or vertically. You can maxi-mize, minimize or close a Machine Editor window by clicking the relevant button on the right-top corner of the window. If no Machine Editor window is displayed, you can use RMxprt>Machine

Editor to bring one window up. When only one Machine Editor window is maximized, the

win-dow title is displayed within square brackets in the Title Bar of the main application winwin-dow. As you enter appropriate property values, the Machine Editor window dynamically updates the rotor, stator, slots, and windings in the Main, Diagram and Winding Editor tabs. As you provide winding information, the Winding Editor tab displays a table of values.

Related Topics

Setting the Window View

Note When you save a project, RMxprt always clears the entire undo/redo history for the

project and its designs.

Printing in RMxprt

Setting the Window View

To fit the entire diagram in the window:

•

Click View>Fit All.

To zoom into the diagram in the window:

•

Click View>Zoom In.

To zoom out of the diagram in the window:

•

Click View>Zoom Out.

Printing in

RMxprt

The printing commands enable you to print the display in the active window. To print the project:

1. Click File>Print.

The Print dialog box appears.

2. You can change the print quality (a higher dpi produces a higher quality print but takes more time and printer memory), or you can send the output to a .prn file.

3. Do one of the following:

•

Click OK to print the project.

•

Click Cancel to dismiss the window without printing.

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Getting Started witn RMxprt 20-15

Working with the RMxprt Project Manager

The Project Manager window displays the open project's structure, which is referred to as the project tree. The Project Manager window displays details about all projects open in the Maxwell Desktop, regardless of type.

To show or hide the Project Manager window, do one of the following:

•

Click View>Project Manager.

A check box appears next to this command if the Project Manager window is visible.

•

Right-click in the toolbars area on the desktop, and then click Project Manager on the short-cut menu.

A check box appears next to this command if the Project Manager window is visible.

Related Topics

Working with the RMxprt Project Tree

Shortcut Menus in the Project Manager Window

Working with the

RMxprt

Project Tree

The project tree is located in the Project Manager window and contains details about all open projects. The top node listed in the project tree is the project name. It is named Projectn by default, where n is the order in which the project was added to the current session of the Maxwell Desktop. Expand the project icon to view all designs and material definitions belonging to the project. For RMxprt projects, the project tree shows where you can select each portion of the machine to open the corresponding tab sheet in the Properties window. The project tree lists options for the general motor characteristics, the stator, the rotor, and other options such as winding data or commutating data. The specific options depend on the machine type you have selected.

Related Topics

Viewing RMxprt Design Details Automatically Expand the Project Tree

Setting the

RMxprt

Project Tree to Expand Automatically

You can set the project tree to automatically expand when an item is added to a project. 1. Click Tools>Options>General Options.

The Options dialog box appears. 2. Click the Project Options tab.

3. Under Additional Options, select Expand Project Tree on Insert. 4. Click OK.

Viewing RMxprt Design Details

Once you insert an RMxprt design into a project, it is listed as the second-level node in the project tree. It is named RMxprtDesignn by default, where n is the order in which the design was added to the project. Expand the design icon in the project tree to view specific data about the model.

The RMxprtDesignn node contains the following project details:

Working with the RMxprt Properties Window

The Properties window displays the attributes, or properties, of an item selected in the project tree-and enables you to edit an item's properties. The properties, tree-and the ability to edit them in the

Prop-erties window vary depending on the type of item selected. The tabs available in the PropProp-erties

window also vary depending the selection.

Single clicking on an item in the Machine section of the project tree displays a docked Properties window located under the project tree. A horizontal scroll bar lets you adjust the view of the prop-erties if necessary. Changes to values in the docked propprop-erties window apply immediately to the selected object.

Double-clicking on an item in the Machine section of the project tree opens a floating Properties window. The floating window can be moved for convenience in viewing the RMxprt Machine

Editor window. Some objects have tabs on the window to control the properties displayed.

Changes to values in the floating window are not applied until you click the OK button.

Related Topics

Showing and Hiding the Properties Window

Setting the Properties Window to Open Automatically

Showing and Hiding the

RMxprt

Properties Window

To show or hide the Properties window on the desktop, do one of the following:

•

Click View>Property Window.

A check box appears next to this command if the Properties window is visible.

•

Right-click in the toolbars area at the top of the desktop, and then click Properties on the shortcut menu.

A check box appears next to this command if the Properties window is visible.

Machine Allows you to specify parameters for various aspects of the machine. A whole or part geometry will be drawn in the Main tab of the Machine

Editor window (based on the values you enter). Parameters Allows you to assign parameters to solve for.

Analysis Displays the solution setups for an RMxprt design. A solution setup specifies how RMxprt computes the solution.

Optimetrics Displays any Optimetrics setups added to an RMxprt design.

Results Displays any post-processing reports that have been generated.

Note To edit a project's design details:

•

In the project tree, double-click the design setup icon that you want to edit. A dialog box appears with that setup's parameters, which you can then edit.

Maxwell 3D Online Help

Getting Started witn RMxprt 20-17

Working with the RMxprt Progress Window

The Progress window monitors a simulation while it is running.

To display or hide the Progress window on the desktop, do one of the following:

•

Click View>Progress Window.

A check box appears next to this command if the Progress window is visible.

•

Right-click in the toolbars area at the top of the desktop, and then click Progress on the short-cut menu.

A check box appears next to this command if the Progress window is visible.

Working with the RMxprt Message Manager

The Message Manager displays messages associated with a project's development, such as error messages about the design's setup or informational messages about the progress of an analysis. To display or hide the Message Manager window on the desktop, do one of the following:

•

Click View>Message Manager.

•

Right-click in the toolbars area at the top of the desktop, and then click Message Manager on the shortcut menu.

A check box appears next to this command if the Message Manager is visible.

Related Topics

Clearing Messages for the RMxprt Project Clearing Messages for the RMxprt Model Copying Messages in RMxprt

Clearing Messages for the

RMxprt

Project

You can clear all the messages for a particular project. To clear messages:

1. Right-click the project# in the Message Manager. A pop-up appears.

2. Click Clear messages for Project#.

Clearing Messages for the

RMxprt

Model

You can clear all the messages for a particular model. To clear messages:

1. Right-click the MaxwellModel# in the Message Manager. A pop-up appears.

2. Click Clear messages for RMxprtDesign#.

Copying Messages in

RMxprt

You can copy all the messages for a particular project.

To copy messages:

1. Right-click in the Message Manager. A pop-up appears.

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Getting Started with RMxprt 20-19

Quick Start for RMxprt

This section briefly introduces how to enter the environment of the software RMxprt and quick mastering its main functions by providing a simple example.

The basic process flow chart is shown below.

RMxprt Example Part 1: Create a New Project

To create a new project:

1. Start Maxwell from the desktop. 2. Click File>New from the menu bar.

This creates a new project folder in the project window with the default name of Projectn.

RMxprt Example Part 2: Select a Machine

To select a machine to insert into the new project:

1. Click Project>Insert RMxprt Design or click the RMxprt icon in the tool bar. This displays the Select Machine Type window.

2. From the list of machine types, for this example, select Brushless Permanent Magnet DC

Motor and click OK.

Create a new Project

Select the machine type.

Input design data.

Create a Maxwell 2D Project for electromagnetic field analyses

Create an electric machine model for Simplorer System Simulation

Analyze the design.

Create Reports and View output characteristics curves.

This closes the window and inserts the Brushless Permanent Magnet DC Motor design in the project.

Continue to Part 3 of the example to Input Design Data.

RMxprt Example Part 3: Input Design Data

In this part of the example, you provide values for the design and for various parts.

1. Click the + symbol by the RMxprt:Designn icon in the project tree to view the design hierar-chy.

This displays the Machine Icon.

2. Double-click the icon to view the Machine Properties window.

Set the values as indicated below.

3. Click OK to close the Machine properties window.

4. Click the + symbol by the Machine icon to view the design hierarchy of the motor. 5. Double-click the Circuit icon to view the Circuit properties window.

Machine Type Brushless Permanent Magnet DC Motor

Number of Poles Set this to 4

Rotor Position Set to Inner

Frictional Loss Set this to 11 (Frictional and wind loss is typically within the range of 1%~3% of the rated output power, in this example, 2% is estimated.) This value is referred to the given Reference Speed. The frictional loss at the computed rated speed will be modified if the computed rated speed is different from the given rated speed.

Wind Loss 0

Reference Speed Set this to 1500

Control Type DC

Circuit Type Set this to C2.

Click the button to display the Select Circuit Type window.

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Getting Started with RMxprt 20-21

Set the values as indicated below.

6. Click OK to close the circuit properties window.

7. Double-click the Stator icon to view the Stator properties window. Set the values as shown below.

Lead Angle of Trigger

Set this to 0 to obtain the maximum average emf for the following phase in the trig_on period.

Trigger Pulse Width

Set this to 90

Transistor Drop Set this to 2 Diode Drop Set this to 2

Outer Diameter Set this to 120.

Inner Diameter Set this to 75.

Length Set this 65 for the length of the Stator iron core.

Stacking Factor 0.95

Steel Type Click on the button to display the Materials window. Select RMxprt library in the Libraries box in the upper right corner of the Materials window: then select M19-24G.

Note: If RMxprt is not listed in the libraries box in the upper right corner of the Materials window, quit the Materials window, click Tools>Configure

Libraries, add RMxprt (under materials) and click the Save as Default

check box. Then click OK.

8. Click OK to close the Stator Properties window.

Take a moment to look at the Maxwell Design window. If you click the Main tab, you will see two concentric rings that represent the inner and outer diameters you specified. If you click the

Winding Editor tab, you see a table of the coils, with columns for Phase, turns, the in slots,

and the out slots. There is also a drawing showing the placement of the 24 slots of the type that you defined here.

9. Click the + symbol by the Stator icon to view the hierarchy under the stator. 10. Double-click the slot icon to view the Slot Properties window.

Set the values as shown below. Some of the properties will not appear until you disable the

Auto Design property in the first row. Number of Slots Set this to 24.

Slot Type Select 2 as the Slot type. Click the button on the row cell to display the Select Slot Type window.

Click the 2 button and OK to close the window.

Skew Width Set this to 1. (To skew one slot pitch.)

Auto Design Uncheck the box to disable auto design. Close the properties window and open it again. Then set the given values for the slot shapes.

Parallel Tooth Uncheck this box. The Tooth Width property becomes invisible. Tooth Width Hs0 Set to 0.5 Hs1 Set to 1.0 Hs2 Set to 8.2 Bs0 Set to 2.5 Bs1 Set to 5.6 Bs2 Set to 7.6

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Getting Started with RMxprt 20-23

11. Click OK to close the Slot Properties window.

12. Double-click the stator Winding icon to view the Winding Properties window. Set the values as shown below.

Winding tab Winding Layers

Winding Type Set this to 2, "Whole Coiled."

Parallel Branches Select 1 for the number of parallel-connected branches, i.e. the

coils in all the slots per phase are in series-connected.

Conductors per Slot

Set this to 60 for the number of conductors per slot, i.e. the number of turns per coil is equal to 30 for double-layer winding.

Coil Pitch Set this to 5. For this example, full pitch = 24 slots /

4 poles = 6. This example uses short coil pitch, 5, i.e. a coil spans from slot 1 to slot 6.

Number of Strands Select 1 for the number of strands (or number of wires per

conductor).

Wire Wrap Select 0. This is the total thickness of double side wire insulation. The input value 0 means that RMxprt will automatically check into the wire gauge library for the wrap thickness relevant to the wire gauge. Different manufacturers produce different Wire Wrap Thickness for electromagnetic wire. Typically, Wire Wrap Thickness for electromagnetic wire is 7~10% of Wire Diameter.

Wire Size Click on the Properties field to display the Wire Size window and select AUTO for automatic design of wire gauge. Wire Size will be set to 0 in the Wire Size window. This example relies on RMxprt to automatically select the optimum diameter and the gauge code for electromagnetic wire. End/Insulation

tab

Input Half-turn Length

Uncheck this box.

Half Turn Length This item is not shown if Input Half Turn Length is unchecked.

13. Click OK to close the stator Winding Properties window. 14. Click Machine>Wiiding>Connect All Coils.

The Winding tab in the main window shows all coils connected. 15. Double-click the Rotor Icon to view the Rotor Properties window.

Set the values as shown below.

End Adjustment Set this to 0 for the linear overhang of the end part of the coil out of the iron core as shown below. In this example, the coil turns immediately at the slot opening, therefore input 0.

Base Inner Radius 0 Tip Inner Diameter 0 End Clearance 0

Slot Liner Set this to 0.3 for the single side thickness of slot insulation.

Wedge Thickness 0 Layer Insulation 0

Limited Fill Factor 0.75

Outer Diameter Set this to 74.0. This is the Stator inner diameter - 2* AirGap.

Inner Diameter Input 26 for the inner diameter of the rotor core. This is also the diameter to match the shaft

Length Input 65 for the length of the rotor core. In this example, the lengths of the iron cores of the stator and the rotor are the same.

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Getting Started with RMxprt 20-25

16. Click OK to close the Rotor Properties window.

17. Click the + symbol by the Rotor icon to open the project hierarchy under the rotor. 18. Double-click the Pole icon to view the Pole Properties window.

Steel Type Select M19-24 for the brand of the silicon-steel sheet for the rotor. In this example, the laminations are punched together on the same sheet; therefore, the brands of the silicon-steel sheet and the stacking factors are the same for the stator and the rotor.

Stacking Factor Input 0.95.

Pole Type Select 1. Click on the button on the Pole Type field to display the Select Pole Type window.

Click the 1 button and OK to close the window.

Maxwell 3D Online Help

Getting Started with RMxprt 20-27

Embrace Input 0.7. Embrace of the rotor represents the ratio of the rotor central angle corresponding to the arc length along the rotor surface of an arched

permanent-magnetic piece to the rotor central angle corresponding to a rotor pole. In a four pole machine with Embrace, 1, each arched permanent-magnetic piece covers 90 mechanical degrees along the rotor surface. Similarly, Embrace 0.667 means 60 mechanical degrees of the coverage of the magnet as shown in the figure.

19. Click OK to close the Pole Properties window.

To continue to Part 4 of the example, go to Analyze the Design.

RMxprt Example Part 4: Analyze the Design.

Before analyzing a design project, a few options should be decided by the following procedures: 1. Click Tools>Options>Machine Options.

The Machine Options window appears. The Wire setting should be set to American. 2. Click OK to close the window.

3. Click RMxprt>Analysis Setup>Add Setup.

This displays the Solution Setup window. Add the following values.

Offset Input 0. The arched permanent-magnetic pieces to form the magnets of the rotor might not be concentric with the rotor as shown in the figure. In the electric machines with non-uniform air-gap, there exists an offset between the two centers. RMxprt terms it as Pole Arc Offset. This example uses uniform air-gap; therefore, the offset is set to 0.

Magnet Type Select XG196/96. This permanent-magnetic steel possesses residual flux density 0.96 Tesla, coercive force 690 kA/m, maximum magnetic energy product 183 kJ/m3, and relative recoil magnetic permeability 1.0.

Maxwell 3D Online Help

Getting Started with RMxprt 20-29

4. Close the dialog to save the Setup.

5. Click RMxprt>Validation Check to ensure that all values have been set.

If any items do not pass validation, use the diagnostic information in the Message Window to resolve any issues.

6. When the design has been validated, click RMxprt>Analyze All. The progress of the analysis is shown in the Progress window.

To continue to Part 5 of the example, go to Create Reports and View Output.

RMxprt Example Part 5: Create Reports and View Output

After you have run an analysis, you can view the solution data. 1. Click RMxprt>Results>Solution Data.

This opens the Solutions window with the Solutions tab selected, and the Full Load Operation Data displayed. The Solutions window contains tabs for the following:

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Solution Data - the Data field in the Solutions window is a drop down menu from which you can select the following:

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Full Load Operation

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Material Consumption

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No Load Operation

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Permanent Magnet

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Rotor Data

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Stator Slot

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Stator Winding

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Steady State Parameters

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Parameter

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Design Sheet

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Curves - Selecting the Curves tab lets you view pre-defined graphs. 2. With the Solution tab selected, select Stator Winding as the Data selected.

Except for a few data corresponding to the wire gauge, this part of data should be the same as the data input in the Stator Winding Properties window. Since automatic design function for

Load Type Const Power

Rated Output Power 0.55 kW Rated Voltage 220 Rated Speed 1500 Operating Temperature 75c

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