Mitigation of Motor Overvoltage in SiC-Device-Based Drives using a Soft-Switching Inverter

Wenzhi Zhou, Mohamed Diab, Xibo Yuan*

*Corresponding author for this work

Research output: Contribution to conferenceConference Paperpeer-review

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In SiC motor drives, the high-voltage slew rate (dv/dt) of switching transients results in excessive motor overvoltage, due to the reflected wave phenomenon (RWP), which stands behind the premature failure of motor winding insulation while raises electromagnetic interference (EMI) problems. This paper adopts a soft-switching inverter topology, denoted as the auxiliary resonant commutated pole inverter (ARCPI), to mitigate the motor overvoltage caused by the RWP in SiC-based cable-fed drives. The performance of the SiC motor drive system under the RWP is first investigated to determine how the motor overvoltage is affected by the dv/dt of the inverter output voltage and the cable length. Then, a SiC ARCPI with profiled output voltage slew rate is utilized as a candidate solution to mitigate the RWP in the cable-fed motor drive. The effectiveness of the presented mitigation approach is experimentally verified, where it is shown that the ARCPI can completely eliminate the motor overvoltage and improve the EMI performance at high frequency region (500 kHz onwards) due to the prolonged rise/fall time of the output voltage, compared with the conventional hard-switching inverter.
Original languageEnglish
Publication statusPublished - 15 Oct 2020
Event2020 IEEE Energy Conversion Congress and Exposition - Detroit, Michigan, United States
Duration: 11 Oct 202015 Oct 2020
Conference number: 12


Conference2020 IEEE Energy Conversion Congress and Exposition
Country/TerritoryUnited States
CityDetroit, Michigan
Internet address


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