Motor drive device

摘要

A motor drive device inputs two detection signals from a rotation position sensor thereby to detect a rotation position, and controls a voltage to be applied to a motor according to the detected rotation position. The motor drive device has a control unit for outputting a first voltage in a first state in which the square sum of sampling values sampled from the two detection signals is a predetermined value, and outputting a second voltage in a second state in which the square sum is not the predetermined value.

主权项

1. A motor drive device configured to
sample, at a first predetermined timing, a first detection signal and a second detection signal from a first rotation position sensor of a motor to obtain a sampling value of the first detection signal and a sampling value of the second detection signal; detect a rotation position of the motor based on the sampling values; and apply a voltage according to the detected rotation position to the motor, wherein the motor drive device is configured to apply a first voltage to the motor in a first state based on the sampling value of the first detection signal and the sampling value of the second detection signal, when a square sum of the sampling value of the first detection signal and the sampling value of the second detection signal is a predetermined value; and apply a second voltage to the motor in a second state based on the sampling value of the first detection signal and a sampling value of the second detection signal at a second predetermined timing, when the square sum is not the predetermined value.