MOTOR CONTROL DEVICE

摘要

A motor control device includes a motor-speed detection unit detecting and outputting a detected motor speed based on an output signal of an encoder connected to a motor that is a synchronous motor; a motor electric-angle detection unit detecting and outputting a detected motor electric angle based on the output signal; a motor electric-angle estimation unit receiving a motor voltage, a motor current, and the detected motor speed, and estimating and outputting an estimated motor electric angle based on the motor voltage and the motor current; and a switching unit receiving the detected motor electric angle and the estimated motor electric angle, determining whether the encoder is operating normally based on the detected motor electric angle and the estimated motor electric angle, outputting the detected motor electric angle when the encoder is operating normally, and outputting the estimated motor electric angle when the encoder is not operating normally.

主权项

1. A motor control device that controls a synchronous motor that does not have a salient-pole property, the motor control device comprising:
a motor electric-angle detection unit that detects an electric angle of a motor on a basis of an output signal of an encoder connected to the motor that is a synchronous motor and outputs a detected motor electric angle; a motor electric-angle estimation unit that receives a motor voltage of the motor and a motor current of the motor, estimates an electric angle of the motor on a basis of the motor voltage and the motor current, and outputs an estimated motor electric angle; and a switching unit that receives the detected motor electric angle and the estimated motor electric angle, determines whether the encoder is operating normally on a basis of the detected motor electric angle and the estimated motor electric angle, outputs the detected motor electric angle when the encoder is operating normally, and outputs the estimated motor electric angle when the encoder is not operating normally.