| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a motor driver system with wide variable speed range and low loss. <P>SOLUTION: An inverter control device 100 comprises: a gate signal generation part 101 having an asynchronous PWM mode and a synchronous PWM mode; and an asynchronous/synchronous change part 102. When the gate signal generation part 101 is generating a gate signal to be given to an inverter 10 in the synchronous PWM mode, the asynchronous/synchronous change part 102 determines whether or not a d-axis current becomes positive among currents supplied to a motor 20 from the inverter 10, and changes a generation mode of the gate signal in the gate signal generation part to the asynchronous PWM mode when the determination result is affirmative. <P>COPYRIGHT: (C)2013,JPO&INPIT |
