CONTROL APPARATUS OF MOTOR

摘要

A temperature detection element that detects a temperature of a detector is provided in a detector that detects a rotational position and/or a rotational speed of a rotor of a motor. An estimated value of a change of a wiring temperature is calculated based on a current supplied to the wiring of the motor. An estimated value of a change of the detector temperature is calculated based on the estimated value of the change of the wiring temperature. A difference between the detector temperature detected by the temperature detection element and the estimated value of the change of the detector temperature is set as an environmental temperature. The environmental temperature is added to the estimated value of the change of the wiring temperature, to estimate an absolute value of the wiring temperature. The wiring temperature is monitored based on the estimated absolute value of the wiring temperature.

主权项

1. A control apparatus of a motor, comprising:
a detector that detects a rotational position and/or a rotational speed of a rotor of a motor, and that has a temperature detection element that detects a temperature of the detector; a circuit that estimates a change of a wiring temperature, to calculate an estimated value of the change of the wiring temperature; a circuit that estimates a change of a detector temperature based on the estimated value of the change of the wiring temperature, to calculate an estimated value of the change of the detector temperature; a circuit that subtracts the estimated value of the change of the detector temperature from an absolute value of the detector temperature detected by the temperature detection element, to calculate an environmental temperature; and a circuit that adds the obtained environmental temperature to the estimated value of the change of the wiring temperature, to calculate an estimated value of an absolute value of the wiring temperature.