Power inverter and electric power steering controller

摘要

A power inverter is provided that can apply to an AC rotary machine three-phase voltages of high amplitudes and low distortion while suppressing ohmic loss attributed to current detection resisters. The power inverter includes a superimposed voltage command computing device which is configured to compute and output a superimposed voltage command depending on the difference between a maximum value and a minimum value of three-phase voltage commands; a voltage command modification device which is configured to add the superimposed voltage command to each of the three-phase voltage commands and outputting modified three-phase voltage commands; and a power output device which is configure to output the three-phase voltages based on the modified three-phase voltage commands.

主权项

1. A power inverter which is configured to convert based on three-phase voltage commands a DC voltage into three-phase voltages and outputs the voltages, the power inverter comprising:
a superimposed voltage command computing device which is configured to compute and output a superimposed voltage command which is calculated using a difference between a maximum value and a minimum value of the three-phase voltage commands; a voltage command modification device which is configured to add the superimposed voltage command to each of the three-phase voltage commands and output modified three-phase voltage commands; and a power output which is configured to output the three-phase voltages based on the modified three-phase voltage commands.