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1. (WO2017038759) VEHICULAR MOTOR DRIVE DEVICE AND VEHICLE HAVING THE SAME MOUNTED THEREON

Pub. No.:    WO/2017/038759    International Application No.:    PCT/JP2016/075182
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: B60L 3/00
B60L 15/20
Applicants: NTN CORPORATION
NTN株式会社
Inventors: MAKINO, Tomoaki
牧野 智昭
Title: VEHICULAR MOTOR DRIVE DEVICE AND VEHICLE HAVING THE SAME MOUNTED THEREON
Abstract:
Provided is a vehicular motor drive device which is capable of quickly detecting the occurrence of a failure in a motor and the like of the motor drive device without requiring the addition of a dedicated sensor and the like, thus suppressing an increase in cost. A failure occurrence determination means (15) is provided with: a rotor angle measurement unit (16) which determines a measurement value of a motor rotor angle phase with respect to a wheel (20), from a motor rotor rotation angle detected by an angle sensor (21) with which an electric motor (2) is equipped, and wheel rotation information detected by a speed sensor (22); and a rotor angle estimation unit (17) which determines, from a motor torque instruction value to a motor controller (12), an estimated value of the motor rotor angle phase with respect to the wheel (20). The failure occurrence determination means (15) includes a failure determination unit (19) which determines that a failure has occurred in the motor drive device (1) if a difference between the measurement value of the motor rotor angle phase and the estimated value is greater than or equal to a threshold value.