POWER CONVERSION APPARATUS,申请号JP20100244926-传众专利搜索

POWER CONVERSION APPARATUS

申请公布号：JP2012100401(A)

申请号：JP20100244926

申请日期：2010.11.01

申请公布日期：2012.05.24

申请人：

HITACHI LTD

发明人：SAKUCHI OSAMU;IMAZU YASUHIRO

分类号：H02M7/487

主分类号：H02M7/487

摘要：<P>PROBLEM TO BE SOLVED: To provide a multiplex three-level power conversion apparatus that suppresses an increase in resistor costs used for resonance suppression by suppressing resonance current causing a temperature rise of DC buses and smoothing capacitors of three-level power converters without lowering conversion efficiency. <P>SOLUTION: The multiplex three-level power conversion apparatus includes: a plurality of sets of three-level power converters each comprising three three-phase inverters having the smoothing capacitors between a positive potential DC input terminal and an intermediate potential DC input terminal and between the intermediate potential DC input terminal and a negative potential DC input terminal; pulse generation means for generating at a predetermined period pulses instructing the plurality of sets of three-level power converters about switching timing; and a resistor connecting the intermediate potential DC input terminals of the sets of three-level power converters. The three three-phase inverters have phase differences of reference values determining the timing of switching of the three-phase inverters corresponding to an electrical angle of substantially plus or minus 120 degrees or substantially plus or minus 240 degrees. <P>COPYRIGHT: (C)2012,JPO&INPIT