Patent ID: 9024552
Filing Date: 2015-05-05
Classification: H02P

Abstract:
1. A current control gain adjusting method for a PM motor comprising: a voltage applying step of applying to a PM motor a voltage command including a DC component and a plurality of frequency components; a motor current detecting step of detecting a responsive motor current flowing through the PM motor in response to application of the voltage command applied in the voltage applying step; a motor frequency characteristic determining step of calculating a transfer function between the applied voltage command and the detected responsive motor current and determining a frequency characteristic of the transfer function; a motor constant determining step of determining a motor constant of the PM motor based on the determined frequency characteristic of the transfer function; a current control gain calculating step of calculating a current control gain using the determined motor constant; and a current control gain adjusting step of adjusting a setting the calculated current control gain on a current control unit, wherein the current control unit adjusts, with the calculated current control gain, a drive signal for driving the PM motor.