| 摘要 |
A motor control device for controlling an electric motor ( 1,6 ) installed in a vehicle, is disclosed. The motor has a field winding ( 101,601 ). The motor control device has a battery ( 4 ) charged by power at a first voltage (Vb), an voltage increase/decrease inverter ( 3 ) capable of increasing the first voltage from the battery, an excitation control circuit ( 102, 106 ) which allows or disallows supply of the exciting current to the field winding ( 101,601 ), a sensor ( 35,41 - 48 ) which detects a state of the vehicle, and a controller ( 8 ). The controller ( 8 ) determines whether or not to start the motor ( 1,6 ) based on a signal from the sensor ( 41 - 48 ). When the motor is to be started, the controller ( 8 ) allows supply of exciting current by the excitation control circuit ( 102, 106 ) and controls the voltage increasing circuit so that the first voltage is increased to a second voltage higher than the first voltage (Vb).
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