Patent ID: 8022660
Filing Date: 2011-09-20
Classification: H02P

Abstract:
1. A control apparatus for an AC rotary machine, including: control means for generating a voltage command based on a current command, and for generating a switching command based on the voltage command; a power inverter which generates an AC output voltage that has an amplitude and an angular frequency controlled based on the switching command; at least one AC rotary machine which is connected to said power inverter; and a current detector which outputs a detection current based on an AC phase current that flows from said power inverter to said AC rotary machine, wherein said control means controls a start control for said AC rotary machine, said control means, in the start control, calculates a resistance drop component corresponding to a resistance drop of said AC rotary machine, based on the detection current, and adjusts the angular frequency of the AC output voltage based on a subtraction output obtained by subtracting the resistance drop component from the voltage command, and said control means, in a start period of the start control, adjusts amplitude of the AC output voltage so that amplitude of the AC phase current may change in conformity with a predetermined function and controls the angular frequency of the AC output voltage to be zero at a start time point of the start period.