Patent ID: 7176652
Filing Date: 2007-02-13
Classification: H02P

Abstract:
1. A motor control apparatus for feedback-controlling a polyphase AC current to be fed to an armature of a polyphase AC rotary electric machine, comprising a harmonic control circuit block, wherein said harmonic control circuit block includes: a high-order dq coordinate converter for converting said polyphase AC current as a signal in a polyphase AC current coordinate system, into a high-order dq signal which is a signal defined in a high-order dq coordinate system rotating at a frequency corresponding to the harmonic order of a harmonic current component to be controlled from among harmonic current components contained in said polyphase AC current; a low-pass filter for extracting a DC signal component contained in said high-order dq signal; a subtractor for obtaining a difference between said DC signal component and a command value for said harmonic current component to be controlled; and a high-order polyphase coordinate converter for converting a signal into said polyphase AC current coordinate system, the signal for asymptotically reducing said difference to zero, wherein said harmonic current component to be controlled is controlled by feeding the harmonic current component output from said harmonic control circuit block to said armature.