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1. (WO2010115865) DEVICE FOR COUPLING ENERGY STORES TO AN INTERMEDIATE VOLTAGE CIRCUIT OF A TRACTION CURRENT CONVERTER

Pub. No.:    WO/2010/115865    International Application No.:    PCT/EP2010/054494
Publication Date: Fri Oct 15 01:59:59 CEST 2010 International Filing Date: Wed Apr 07 01:59:59 CEST 2010
IPC: B60L 7/10
B60L 7/22
H02P 3/18
H02P 3/22
Applicants: SIEMENS AKTIENGESELLSCHAFT
FUCHS, Andreas
Inventors: FUCHS, Andreas
Title: DEVICE FOR COUPLING ENERGY STORES TO AN INTERMEDIATE VOLTAGE CIRCUIT OF A TRACTION CURRENT CONVERTER
Abstract:
The invention relates to a device (56) for coupling energy stores (66,68) to an intermediate voltage circuit (18) of a traction current converter, which comprises a feed circuit, an intermediate voltage circuit capacitor (26), and a load-side self-guided current converter (38). According to the invention, said device (56) comprises two bridge branches (58,60), each having two semiconductor switches (T9, T10; T11, T12) which can be switched off and which are electrically connected in series and two chokes (62,64), an energy store (66,68) is electrically connected in parallel to each bridge branch (58,60), each bridge branch (58,60) is connected in an electrically conductive manner by means of a connection (70,74) to a positive or negative current bar (16,20) of the intermediate voltage circuit (18) and by means of another connection (72,76) via a choke (64,62) to a connection point (80,78) of two semiconductor switches (T11, T12; T09, T10) of the other bridge branch (60,58) that can be switched off. By means of said device (56) according to the invention, two energy stores (66,68) can be coupled to an intermediate voltage circuit (18) of a traction current converter and the residual ripple of the current flowing in the intermediate voltage circuit (18) can be reduced.