Patent ID: 8350507
Filing Date: 2013-01-08
Classification: H02P

Abstract:
1. A controller of a rotary electric machine performing rotation control of the rotary electric machine, comprising: current detection means for detecting rotary electric machine currents flowing to the rotary electric machine; position estimation means for estimating a rotor position in accordance with the rotary electric machine currents detected by the current detection means; control means for outputting voltage commands in accordance with the rotor position estimated by the position estimation means; pulse-width modulation means for outputting logic signals which are pulse-width modulated based on the voltage commands from the control means and on a switching cycle used for pulse-width modulation control; and voltage application means for applying voltages to the rotary electric machine in accordance with the logic signals outputted by the pulse-width modulation means, wherein the voltage commands outputted by the control means are obtained by superimposing, on fundamental voltages for driving the rotary electric machine, position detection voltages which each have a cycle equal to m times (m is an integer of three or more) of the switching cycle and which are different in phase among respective phases.