MOTOR DRIVING DEVICE AND DETECTION METHOD FOR DETECTING MALFUNCTION IN HEAT RADIATION PERFORMANCE OF HEATSINK

摘要

A motor driving device capable of reliably detecting a malfunction in the performance of a heatsink. The motor driving device includes a heat generating element, a heatsink, an electric power detecting part for detecting a consumed power of the heat generating element, a temperature detecting part for detecting a temperature of the motor driving device, a temperature change calculating part for calculating, as a detected valuation, an amount of change in the temperature within a predetermined time, a reference determination part for determining a reference amount of change in the temperature based on the temperature and the consumed power, and a temperature change judging part for comparing the reference amount of change with the detected amount of change, and judges whether the detected change is different from the reference change.

主权项

1. A motor driving device comprising:
a heat generating element; a heatsink which cools the heat generating element; an electric power detecting part which detects a consumed power of the heat generating element; a temperature detecting part which detects a temperature of the motor driving device; a temperature change calculating part which calculates an amount of change in the temperature within a predetermined time as a detected amount of change, based on the temperature detected by the temperature detecting part; a reference determination part which determines a reference amount of change in the temperature, based on the temperature detected by the temperature detecting part and on the consumed power detected by the electric power detecting part; and a temperature change judging part which compares the reference amount of change determined by the reference determination part with the detected amount of change calculated by the temperature change calculating part, and judges whether the detected amount of change is different from the reference amount of change.