Partial Charging of Capacitors for Improving Voltage Profiles of CSI Fed Motor Drives*

doi:10.23919/CJEE.2020.000032

Chinese Journal of Electrical Engineering ›› 2020, Vol. 6 ›› Issue (4): 77-85.doi: 10.23919/CJEE.2020.000032

Special Issue: Special Issue on Switched-Capacitor Circuits and Partial Processing Techniques

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Partial Charging of Capacitors for Improving Voltage Profiles of CSI Fed Motor Drives^*

Zheng Wang^*, Yang Xu

School of Electrical Engineering, Southeast University, Nanjing 210096, China

Received:2020-10-10 Revised:2020-11-11 Accepted:2020-11-20 Online:2020-12-25 Published:2021-01-15
Contact: *E-mail: zwang@seu.edu.cn
About author:Zheng Wang (S’05-M’09-SM’14) received the B.S. and M.S. degrees from Southeast University, Nanjing, China, in 2000 and 2003, respectively, and the Ph.D. degree from The University of Hong Kong, Hong Kong, China, in 2008, all in electrical engineering.From 2008 to 2009, he was a postdoctoral fellow in Ryerson University, Toronto, ON, Canada. He is currently a full professor in the School of Electrical Engineering, Southeast University, China. His research interests include electric drives, power electronics, and distributed generation. He has authored or coauthored over 100 internationally refereed papers and four books in these areas.Prof. Wang received several academic awards including IEEE PES Chapter Outstanding Engineer Award, Jiangsu Outstanding Young Scholar Award and four Best/Outstanding Paper Awards. He is an associate editor of IEEE Trans. on Industrial Electronics and Journal of Power Electronics.
Yang Xu (S’20) received the B.S. degree in electrical engineering from Southeast University, Nanjing, China, in 2018. He is currently working toward the Ph.D. degree in electrical engineering in the School of Electrical Engineering, Southeast University, Nanjing, China.His research interests include current-fed high frequency converters, wide-bandgap device applications and motor drives.
Supported by:
*Jiangsu Natural Science Foundation of China (BK20180013), and in part by Shen Zhen Science and Technology Project (CYJ20180306174439784).

Abstract

Abstract: The fast switching behaviors of wide bandgap devices bring some challenges such as high du/dt and limited short-circuit current withstand capability to the reliable operation of the motor drives. The current-source-inverter (CSI) provides a promising solution in mitigating those challenges by owning the DC-link choke, the reverse-voltage blocking switches and AC commutation capacitors. To further reduce du/dt on switches of CSI fed motor drives, the technique of partial charging of capacitors have been investigated in this paper. By designing the series-connected and the parallel-connected partial-charging circuit for capacitors in DC-link, the voltage profile of CSI could be improved. Specifically, the zero-voltage-switching (ZVS) is achieved for main power switches, the du/dt is reduced and the overvoltage protection is presented. The working mechanism of the technique of partial charging of capacitor is described and one example is discussed on the dual three-phase motor drive. The experimental verification is presented to show the performance of partial charging technique for improving voltage profile of CSI fed motor drives.

Key words: Current source inverter, partial charging, voltage profile, zero-voltage switching, overvoltage protection

Zheng Wang, Yang Xu. Partial Charging of Capacitors for Improving Voltage Profiles of CSI Fed Motor Drives^*[J]. Chinese Journal of Electrical Engineering, 2020, 6(4): 77-85.

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Partial Charging of Capacitors for Improving Voltage Profiles of CSI Fed Motor Drives^*

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