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1. (WO2018002852) CONVERTER APPARATUS HAVING SINGLE-PHASE AND MULTI-PHASE OPERATION MODES

Pub. No.:    WO/2018/002852    International Application No.:    PCT/IB2017/053884
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Thu Jun 29 01:59:59 CEST 2017
IPC: H02M 1/15
H02M 1/42
H02M 3/335
H02M 1/10
Applicants: HELLA GMBH & CO. KGAA
Inventors: LU, Juncheng
BAI, Hua
Title: CONVERTER APPARATUS HAVING SINGLE-PHASE AND MULTI-PHASE OPERATION MODES
Abstract:
An AC/DC conversion apparatus includes first, second, and third AC/DC conversion modules operated by a controller in two modes of operation. In the first mode, the input AC signal is 3-phase and each of the three modules are enabled to handle a respective one of the input phases. In the second mode, the input AC signal is single phase and the first and second modules are enabled to deliver output power based on the single-phase AC input, while the controller actuates an H-bridge switches in the third module to which active filter circuitry is connected, to reduce an AC component in the output signal. The active filter circuitry can be selectively connected to the H-bridge switches when single-phase operation is desired, which circuitry may be disposed in a filter housing having male electrical terminals that cooperate with corresponding female terminals associated with the third module.