Title:
MOTOR CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2017/026261
Kind Code:
A1
Abstract:
Provided are a motor control device, an electric power steering device, and a vehicle that are capable of accurately controlling the driving of an electric motor even when a motor-electrical-angle detecting unit, that detects the electrical angle of the motor, fails. The present invention is provided with: a relative offset estimating unit (62) that estimates a relative offset (θoff) between a reference value (θosr) of the output-shaft rotational angle detected value (θos) of a steering shaft (12), which is detected by an output-side rotational angle sensor (13c), and the origin (θmd) of the electrical angle of a three-phase electric motor (22); and a motor-electrical-angle estimating unit (63) that calculates a motor-electrical-angle estimate (θme) on the basis of the output-shaft rotational angle (θos) and the relative offset (θoff). When at least one of a resolver (23a) and an angle calculating unit (60) is malfunctioning, driving of the three-phase electric motor (22) is controlled on the basis of the motor-electrical-angle estimate (θme) estimated by the motor-electrical-angle estimating unit (63).
Inventors:
NAMPEI KOUICHI (JP)
Application Number:
PCT/JP2016/071747
Publication Date:
February 16, 2017
Filing Date:
July 25, 2016
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B62D6/00; B62D5/04; H02P6/16; B62D113/00; B62D119/00; B62D137/00
Foreign References:
| JP2004291923A | 2004-10-21 | |||
| JP2011051537A | 2011-03-17 | |||
| JP2006296025A | 2006-10-26 |
Other References:
See also references of EP 3243728A4
Attorney, Agent or Firm:
NAITOH Yoshiaki et al. (JP)
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