Motor control system and safety monitoring system therefor

摘要

Each of a host controller and a motor control apparatus included in a motor control system that drives a motor includes a step of determining, with respect to motor rotation state estimation information estimated based on an electric current and a voltage to the motor, whether an operation state of the motor is normal according to what kind of a relation an operation command output by the host controller and a detected motor position or motor speed have.

主权项

1. A motor control system comprising:
a host controller configured to output an operation command; a detector configured to detect a motor position or a motor speed of a motor, wherein detection information comprises:
a detected motor position being the motor position detected by the detector when the detector is a position detector, or being calculated from the motor speed detected by the detector when the detector is a speed detector; anda detected motor speed being the motor speed detected by the detector when the detector is the speed detector, or being calculated from the motor position detected by the detector when the detector is the position detector; and a motor control apparatus configured to drive the motor based on the detection information and the operation command from the host controller, wherein: the host controller comprises a first safety monitoring unit configured to determine whether or not motor rotation state estimation information input from the motor control apparatus, the operation command output to the motor control apparatus, and the detection information are consistent with each other to determine whether an operation state of the motor is normal or not, and the motor control apparatus comprises:
a motor-rotation-state estimating unit configured to output the motor rotation state estimation information estimated based on an electric current and a voltage to the motor; anda second safety monitoring unit configured to determine, whether or not the motor rotation state estimation information output by the motor-rotation-state estimating unit, the operation command from the host controller, and the detection information are consistent with each other to determine whether an operation state of the motor is normal or not.