| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an airborne motor driving control device that can achieve ensuring of control performance and suppressing of heat generation at a high degree with good balance. <P>SOLUTION: An airborne motor driving control device has an inverter 23, and a controller 24 having an instruction signal processing part 25 and a PWM frequency controller 29 to perform pulse width modulation control. The instruction signal processing part 25, on receipt of a first PWM frequency instruction signal, outputs a high PWM frequency instruction signal so that non-synchronization PWM control is performed at a PWM frequency of a predetermined constant frequency, and, on receipt of a second PWM frequency instruction signal, outputs a low PWM frequency instruction signal so that non-synchronization or synchronization PWM control is performed at a lower frequency than the above frequency. The PWM frequency controller 29, when inputting the low PWM frequency instruction signal, controls the PWM frequency so that the non-synchronization PWM control is performed in the case that a rotation speed of a motor 14 is less than a predetermined rotation speed, and that the synchronization PWM control is performed in the case that the rotation speed of the motor 14 is equal to or more than the predetermined rotation speed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
