A novel Modular Multilevel Converter topology with auxiliary voltage clamping circuit for high voltage motor drive

Author

Xiaoxin Wang ; Qiongxuan Ge ; Zhunfang Chu ; Yongjie Luo ; Zhandong Sun ; Yaohua Li ; Xiaomei Lv

Author_Institution

Maglev & Linear Drive Technol. Res.Center, Inst. of Electr. Eng., Beijing, China

fYear

2014

fDate

9-11 June 2014

Firstpage

1392

Lastpage

1397

Abstract

The conventional Modular Multilevel Convertor (MMC) couldn´t operate in low frequency for high voltage motor drive, because of the cell capacitor voltage fluctuation increasing severely with frequency decreasing. This paper presents a new back-to-back topology of MMC with auxiliary voltage clamping circuit for motor drive. The auxiliary circuit use soft-switch strategy to transfer energy between the cell capacitors to balance their voltage. The simulation results show the new MMC topology inverter could keep the capacitor voltage stable in very low frequency operation and could make motor to run from standstill to rated speed smoothly.

Keywords

motor drives; power convertors; voltage regulators; MMC topology inverter; auxiliary voltage clamping circuit; back-to-back topology; cell capacitor voltage fluctuation; high voltage motor drive; modular multilevel convertor; soft-switch strategy; Capacitors; Inductance; Induction motors; Integrated circuit modeling; Inverters; Topology; Voltage control; MMC; auxiliary voltage clamping circuit; motor drive; soft-switch;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications (ICIEA), 2014 IEEE 9th Conference on

Conference_Location

Hangzhou

Print_ISBN

978-1-4799-4316-6

Type

conf

DOI

10.1109/ICIEA.2014.6931386

Filename

6931386