Search International and National Patent Collections

1. (WO2018100782) POWER CONVERSION DEVICE AND CONTROL METHOD THEREFOR

Pub. No.:    WO/2018/100782    International Application No.:    PCT/JP2017/024312
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Tue Jul 04 01:59:59 CEST 2017
IPC: H02M 7/48
Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD.
住友電気工業株式会社
Inventors: SHIMIZU, Yusuke
清水 裕介
AKITA, Tetsuo
秋田 哲男
AYAI, Naoki
綾井 直樹
Title: POWER CONVERSION DEVICE AND CONTROL METHOD THEREFOR
Abstract:
Provided is a power conversion device comprising: a DC/DC converter having a direct current reactor; an inverter; an alternating current reactor; and a control unit. The control unit performs control, on the basis of a voltage of a direct current power source, a direct current-side voltage based on an impedance of the DC/DC converter, and an alternating current-side voltage target value of the inverter to be obtained by a switching operation, so that a period in which the DC/DC converter performs high frequency switching and a period in which the inverter performs high frequency switching appear alternately within a half cycle of the frequency of an alternating current feed path. The control unit also calculates, on the basis of direct current superimposition characteristics in which the inductances of the direct current reactor and the alternating current reactor change according to a current value, the alternating current-side voltage target value of the inverter and a voltage target value of a DC bus by introducing into the calculation a voltage drop of each reactor corresponding to the present current value.