| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor control device that ensures the power performance of a motor by sine wave PWM control as much as possible when the motor becomes impossible in rectangular wave control. <P>SOLUTION: The motor control device 10 for a vehicle includes a converter 14 that boosts a DC voltage fed from a battery 12, an inverter 16 which converts the boosted DC voltage which is fed from the converter 14 to an AC voltage, and applies the AC voltage to the motor 18, and a control unit 20 that switches drive control methods of the motor 18 by controlling the operations of the converter 14 and the inverter 16. When the rectangular wave control becomes impossible, the control unit 20 selects a sine wave PWM control fixing mode which uses only the sine wave PWM control as the drive control method of the motor 18, and sets the maximum boosted voltage in the converter 14 to a large value as much as possible. <P>COPYRIGHT: (C)2010,JPO&INPIT |
