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Title:
MOTOR CONTROLLER
Document Type and Number:
Japanese Patent JP2019047678
Kind Code:
A
Abstract:
To inhibit rotor position estimation accuracy from being reduced by low-pass filter processing on detection data on a neutral point voltage.SOLUTION: A motor controller includes: a first low-pass filter having a first time constant; and a rotor position estimation unit for estimating the position of a rotor on the basis of neutral point voltage of a stator of an electric motor and a switched state among a plurality of electrification modes. The rotor position estimation unit estimates the position of the rotor by using neutral point voltage after passing through the first low-pass filter during one electrification mode of the plurality of electrification modes and without using the neutral point voltage after passing through the first low-pass filter when electrification mode switching is performed among the plurality of electrification modes.SELECTED DRAWING: Figure 6

Inventors:
OTA HIROYUKI
SUGIYAMA YOSHITAKA
KASHIMA TOKUMI
Application Number:
JP2017170457A
Publication Date:
March 22, 2019
Filing Date:
September 05, 2017
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
H02P6/182; H02M7/48
Domestic Patent References:
JP2004072909A2004-03-04
JPH07327385A1995-12-12
Attorney, Agent or Firm:
小川 護晃
西山 春之
関谷 充司



 
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