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Title:
CONTROL DEVICE FOR THREE-PHASE SYNCHRONOUS ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2019/150984
Kind Code:
A1
Abstract:
Provided is a control device for a three-phase synchronous electric motor that makes it possible to improve accuracy of detection of a rotor position even if there is offset included in a neutral point potential of the three-phase synchronous electric motor. A control device of a three-phase synchronous electric motor is provided with: a three-phase synchronous electric motor (4) provided with a first three-phase winding (41) and a second three-phase winding (42); a first inverter (31) connected to the first three-phase winding; a second inverter (32) connected to the second three-phase winding; a first control unit (61) for estimating a rotor position of the three-phase synchronous electric motor from a neutral point potential of the first three-phase winding and controlling the first inverter; and a second control unit (62) for estimating a rotor position of the three-phase synchronous electric motor from a neutral point potential of the second three-phase winding and controlling the second inverter. The first control unit corrects the neutral point potential of the first three-phase winding on the basis of a direct current voltage of the first inverter.

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Inventors:
HARA TAKAFUMI (JP)
AOYAGI SHIGEHISA (JP)
AJIMA TOSHIYUKI (JP)
KASHIMA MASAKI (JP)
SUGIYAMA YOSHITAKA (JP)
Application Number:
PCT/JP2019/001429
Publication Date:
August 08, 2019
Filing Date:
January 18, 2019
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H02P6/182; H02P25/22; H02P29/024
Domestic Patent References:
WO2013153656A12013-10-17
WO2017187599A12017-11-02
WO2014157628A12014-10-02
Foreign References:
JP2014138530A2014-07-28
US20110057593A12011-03-10
JP2014217191A2014-11-17
JP2009183063A2009-08-13
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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