- Patent Title: Power conversion device, motor drive device including power conversion device, air blower and compressor including motor drive device, and air conditioner, refrigerator, and freezer including air blower and compressor
-
Application No.: US14781064Application Date: 2013-04-08
-
Publication No.: US09647604B2Publication Date: 2017-05-09
- Inventor: Koichi Arisawa , Keisuke Uemura , Takuya Shimomugi , Yosuke Shinomoto , Shigeo Umehara , Shinichiro Ura , Makoto Tanikawa
- Applicant: Mitsubishi Electric Corporation
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Posz Law Group, PLC
- International Application: PCT/JP2013/060619 WO 20130408
- International Announcement: WO2014/167625 WO 20141016
- Main IPC: H02P7/14
- IPC: H02P7/14 ; H02P29/024 ; H02M1/32 ; H02M7/5387 ; F04D25/06 ; F04D25/08 ; F25B31/02 ; H02H7/10 ; H02M7/537 ; H02P27/06 ; H02M1/00 ; F25B49/02 ; H02H3/08 ; H02H7/122
Abstract:
The power conversion device includes a power-supply shunt resistance provided between an inverter and the negative-voltage side of a DC power supply, respective-phase lower-arm shunt resistances provided between the power-supply shunt resistance and respective-phase lower-arm switching elements, a first overcurrent detection unit performing overcurrent detection on a current that flows through the power-supply shunt resistance on the basis of a power-supply shunt-resistance voltage, and a second overcurrent detection unit performing overcurrent detection on each current that flows through the respective-phase lower-arm shunt resistances on the basis of respective-phase lower-arm voltages, wherein overcurrent detection is performed on each phase current using either one of the overcurrent detection result of the first overcurrent detection unit and the overcurrent detection result of the second overcurrent detection unit.
Public/Granted literature
Information query
