THREE-PHASE SYNCHRONOUS ELECTRIC MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE USING SAME

WIPO Patent Application WO/2019/031157

A1

Provided is a three-phase synchronous electric motor control device capable of improving rotor position detection accuracy when one three-phase synchronous electric motor is driven by inverters of a plurality of systems and also provided is an electric power steering device using the three-phase synchronous electric motor control device. The three-phase synchronous electric motor control device 3 is provided with: a three-phase synchronous electric motor equipped 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 device for controlling the first inverter on the basis of the rotor position of the three-phase synchronous electric motor; and a second control device for controlling the second inverter on the basis of the rotor position of the three-phase synchronous electric motor. The first control device estimates the rotor position on the basis of the neutral point potential of the first three-phase winding and the neutral point potential of the second three-phase winding.

HARA TAKAFUMI (JP)
AOYAGI SHIGEHISA (JP)
AJIMA TOSHIYUKI (JP)
OTA HIROYUKI (JP)
SUGIYAMA YOSHITAKA (JP)

PCT/JP2018/026452

February 14, 2019

July 13, 2018

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

H02P6/18; B62D5/04; H02P25/22; H02P27/06

JP2014204574A	2014-10-27
JP2001276485A	2001-10-09
US20110089876A1	2011-04-21

TODA Yuji (JP)

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