[PDF] Top 20 A hybrid modular multilevel converter for medium-voltage variable-speed motor drives

... capacitor voltage will be fluctuated when arm current flows ...capacitor voltage ripple is theoretically proportional to the output current amplitude and inversely proportional to the output frequency ... See full document

... a modular multilevel converter (MMC) with high-frequency magnetic channels between adjacent-arm submodules (SMs), suitable for medium-voltage, high-power three-phase variable- ... See full document

... capacitor voltage is mainly affected by the output phase current and output ...cell voltage fluctuation is proportional to amount of the output phase current and inversely proportional to working frequency ... See full document

... to medium-voltage motor drives for energy savings without regenerative brakes ...A modular multilevel cascade inverter based on double star chopper cells (MMCI-DSCC) has been ... See full document

... THE modular multilevel converter (MMC) was introduced in 2002 [1] as dc–3ac configuration for high-voltage dc power ...electrical drives in the range of medium voltage was ... See full document

... to medium-voltage motor drives for energy savings without regenerative brakes [1] – ...A modular multilevel cascade inverter based on double- star chopper cells (MMCI-DSCC) has ... See full document

... Abstract—A modular multilevel converter (MMC) configuration is presented as a medium-voltage high-power drive for variable- speed applications incorporating symmetrical ... See full document

... For the balancing in horizontal direction, the energy transfer between the three phases of the MMC see Fig. 5, is achieved by the dc-components of the inner currents I eαDC and ieβDC. According to (21) and (22), they ... See full document

... dc-link voltage. Similar to the previous two topologies, this modular structure benefits from fault-tolerant capability, when one cell fails, it can be bypassed by a switch connected in parallel to the ... See full document

... whole speed range, including zero-speed crossing operation, the rotational speed profile shown in ...mode voltage. However, this is not a problem since the motor currents are ... See full document

... DC voltage, and operating at relatively high frequency, exhibiting high response speed are used to control DC motors ...the speed drives and position of control ...base speed can be ... See full document

... new modular multilevel converter (MMC) configuration as a medium-voltage drive for variable-speed applications incorporating symmetrical six-phase ...limited ... See full document

... The energy balancing of the cells inside of each arm [7], [10], [16], see Figs. 5 and 7. By the modulator, these six reference values have to be converted to the corresponding switching states for the cells which has to ... See full document

... a modular scheme of decoupling the DM ripple power in both the upper and lower arms of each MMC leg is to divert the excessive energy stored in an upper-arm SM capacitor into a lower-arm one in a closed magnetic ... See full document

... SM voltage ripple is in direct proportion to the power factor, both the upper- and lower-arm SM voltage ripple are inversely proportional to the power ...the voltage ripple diversity, the maximum ... See full document

... MV drives applications where startup from stand-still and continuous low-speed operation are ...six-phase motor drive system with significantly diminished SM capacitance and reduced silicon ... See full document

... the modular multilevel converter (MMC) in HVDC transmission and high-voltage motor drives have received more and more attention, which bring increasingly demands on power ... See full document

... high voltage during pulse generation, hence reverse blocking switches (series connected diodes) are required ...no voltage sensors for generating HV bipolar rectangular ...of multilevel pulse ... See full document

... required voltage from 0V before delivering each high-voltage (HV) ...supply voltage is ...Half-Bridge Modular Multilevel Converter (HB-MMC) sub-modules (SMs) charged sequentially ... See full document

... Space vector modulation technique is used to control the inverter. Compared to SPWM the Total Harmonic Distortion (THD) and Lower Order harmonics(LOH) contents are decreased in SVPWM.It is known that the maximum value ... See full document