Control apparatus for electric rotary machine

摘要

In a control apparatus for an AC electric motor, a dq axis current feedback control unit 44 and a qn axis current feedback control unit 46 execute a feedback control of higher harmonic components of actual currents id and iq flowing in an AC electric machine 10 to higher harmonic current instruction values Σidkr and Σiqkr. A d axis current instruction value adjusting unit 24 and a q axis current instruction value adjusting unit 26 add the higher harmonic current instruction values Σidkr and Σiqkr to fundamental current instruction values idr and iqr. Ad axis current feedback control unit 32 and a q axis current feedback control unit 34 execute a feedback control of a difference between the actual currents id and iq and the sum of the higher harmonic current instruction values Σidkr, Σiqkr and the fundamental current instruction values idr and iqr into zero.

主权项

1. A control apparatus for an electric rotary machine comprising:
a fundamental rotary coordinate component calculation unit which calculates components in a fundamental rotary coordinate system, the fundamental rotary coordinate system rotating in synchronization with a frequency of a fundamental current, and an output torque of an electric rotary machine being determined by the fundamental current in the current flowing in the electric rotary machine; a first control unit which executes a feedback control of a current flowing in the electric rotary machine so that the current flowing in the electric rotary machine is adjusted to instruction values, the instruction values being obtained by adding higher harmonic instruction values as instruction values of higher harmonic current having a frequency of an integer multiple of a frequency of the fundamental current and fundamental instruction value of the fundamental current on the basis of the components of the rotary coordinate system of the fundamental wave calculated by the fundamental rotary coordinate component calculation unit, and outputs a first instruction voltage; a higher harmonic rotary coordinate component calculation unit which calculates components of the higher harmonic rotary coordinate system which rotates in synchronization with the frequency of the higher harmonic current on the basis of a signal as the components of the components in a fundamental rotary coordinate system calculated by the fundamental rotary coordinate component calculation unit; a second control unit which executes a feedback control for the higher harmonic current by using the components of the higher harmonic coordinate system calculated by the higher harmonic rotary coordinate component calculation unit, and outputs a second instruction voltage; an addition unit which adds the first instruction voltage calculated by the first control unit and the second instruction voltage calculated by the second control unit; a dq-uvw transformation unit which performs a dq-uvw inverse transformation to calculate an instruction voltage on the basis of the addition result calculated by the addition unit; and an alternating current voltage supply unit which supplies an alternating current voltage to the electric rotary machine on the basis of the instruction voltage calculated by the dq-uvw transformation unit.