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1. (WO2000064039) MOTOR CONTROL APPARATUS AND CONTROL METHOD

Pub. No.:    WO/2000/064039    International Application No.:    PCT/JP2000/002509
Publication Date: Oct 26, 2000 International Filing Date: Apr 17, 2000
IPC: B60L 3/00
B60L 11/18
B60L 15/02
H02P 6/08
Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA

KOIDE, Satoshi

KAWABATA, Yasutomo

YAMADA, Eiji

Inventors: KOIDE, Satoshi

KAWABATA, Yasutomo

YAMADA, Eiji

Title: MOTOR CONTROL APPARATUS AND CONTROL METHOD
Abstract:
A torque voltage to be applied to a motor is determined according to a required torque, and the duty of an inverter is controlled so that the torque voltage is applied according to the voltage of a battery. In a motor control apparatus thus constituted, the inverter is switched at a prescribed duty before starting a normal operation of the motor, to apply a voltage to the motor. Furthermore, the current flowing according to this voltage is sensed. If the relation between the power source voltage and the current when the inverter is switched at the prescribed duty is stored in a table, the real value of the power source voltage is calculated and the offset error generated in the voltage sensor of the battery can be specified. Accordingly, the torque voltage can be appropriately controlled by correcting the measured voltage value of the battery.