ELECTRIC MOTOR WINDING TEMPERATURE DETECTION METHOD AND DEVICE AS WELL AS ELECTRIC MOTOR THERMAL PROTECTION METHOD AND DEVICE

摘要

A method and device for detecting the temperature of a motor winding, a method and device for thermal protection of a motor are provided. the method for detecting the temperature of a motor winding includes: obtaining the temperature of the motor winding at a first time before a time step (S10); calculating the temperature rise of the rotor equivalent body after the motor runs for the time step (S20); then calculating the temperature of the motor winding after the motor runs for the time step by superposing the temperature rise of the rotor equivalent body after the motor runs for the time step on the temperature of the motor winding obtained at the first time(S30). By the method for detecting the temperature of a motor winding, the real-time monitoring on the temperature of the winding is achieved, thus playing the ability of the motor and improving sensitivity.