Patent ID: 9143065
Filing Date: 2015-09-22
Classification: H02P

Abstract:
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.