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1. (WO2016086461) CHOPPER CIRCUIT

Pub. No.:    WO/2016/086461    International Application No.:    PCT/CN2014/094068
Publication Date: Jun 9, 2016 International Filing Date: Dec 17, 2014
IPC: H02M 5/458
Applicants: YONGJI XINSHISU ELECTRIC EQUIPMENT CO., LTD.
永济新时速电机电器有限责任公司
Inventors: GAO, Yongjun
高永军
ZHANG, Guicheng
张桂成
GUAN, Junqing
管俊青
ZHU, Jianbo
朱剑波
SHEN, Sheng
沈晟
WU, Yimin
伍益民
LIU, Rong
刘荣
ZHANG, Ruifeng
张瑞峰
Title: CHOPPER CIRCUIT
Abstract:
A chopper circuit comprises a first chopper circuit (1) and a second chopper circuit (2). A current input terminal of the first chopper circuit (1) is electrically connected to a VDC positive terminal of an intermediate direct-current circuit, and a current output terminal of the first chopper circuit (1) is electrically connected to a VDC negative terminal of the intermediate direct-current circuit. A current input terminal of the second chopper circuit (2) is electrically connected to the VDC positive terminal of the intermediate direct-current circuit, and a current output terminal of the second chopper circuit (2) is electrically connected to the VDC negative terminal of the intermediate direct-current circuit. The first chopper circuit (1) and/or the second chopper circuit (2) is used for being turned on when the bus voltage of the intermediate direct-current circuit exceeds a preset value to consume part of the bus voltage so as to decrease the bus voltage to a specified value. In this way, stability of a traction converter is improved, and further stability of a traction system is improved.