| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device capable of reducing a power supply harmonic current, and simplifying its configuration.SOLUTION: A controller 7 for a motor driver, generates a sine wave corresponding to a rotation speed of a motor 9 and its third order harmonic wave, sets a superimpose amount k of a third order harmonic wave on the sine wave, generates a motor voltage waveform by superimposing a third order harmonic with the set superimpose amount k onto a sine wave, generates a motor voltage amplitude command value so that a phase difference of a motor current and the sine wave becomes a target phase difference, limits the motor voltage amplitude command value to be equal to or less than an upper limit value PMWmax which depends on the superimpose amount k, and performs PWM control of an inverter 5 based on a motor voltage waveform and a motor voltage amplitude command value. Thus, the controller 7 can avoid an increase of a power supply harmonic current Ih due to distortion of a motor voltage waveform. |
