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1. (WO2017153581) METHOD OF CONTROLLING A MULTI CURRENT PATH DC/DC CONVERTER AND MULTI CURRENT PATH DC/DC CONVERTER

Pub. No.:    WO/2017/153581    International Application No.:    PCT/EP2017/055692
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: H02M 3/156
H02M 1/00
Applicants: KNORR-BREMSE POWERTECH GMBH & CO. KG
Inventors: LIU, Jie
KRUMBOECK, Jörg
Title: METHOD OF CONTROLLING A MULTI CURRENT PATH DC/DC CONVERTER AND MULTI CURRENT PATH DC/DC CONVERTER
Abstract:
A method of controlling a multi current path DC/DC converter (2), having a pair of input terminals (10), a first power transfer module (100) with a first buffer capacitor (1 10), a first switch (130), a first inductor (132) and a first output capacitor (120), and a second power transfer module (200) with a second buffer capacitor (210), a second switch (230), a second inductor (232), and a second output capacitor (220), wherein the first and second buffer capacitors are connected in series between the pair of input terminals of the multi current path DC/DC converter, includes the steps of operating the first switch in accordance with a first peak current mode control, such that power is intermittently transferred from the first buffer capacitor to the first output capacitor via a first power transfer current (h) through the first inductor, with the first peak current mode control of the first switch being carried out with respect to the first power transfer current, and operating the second switch in accordance with a second peak current mode control, such that power is intermittently transferred from the second buffer capacitor to the second output capacitor via a second power transfer current (i2) through the second inductor, with the second peak current mode control of the second switch being carried out with respect to the second power transfer current, wherein each of the first and second peak current mode controls is dependent on a relation between a momentary power transfer state of the first power transfer module and a momentary power transfer state of the second power transfer module.