Temperature protection and automatic control device for motor

The invention discloses a device for automatically controlling a heating element of a motor by monitoring temperature of the motor. A stopping signal is sent if the temperature is over-limit, and audible and visible alarm is sounded. A programmable controller is used as a main controller; a platinum thermistor is used as a temperature measurement element; by temperature comparison, the heating element is controlled according to set parameters; and furthermore, six temperature values, namely temperature of a front bearing and a rear bearing, temperature of three groups of inner windings and external ambient temperature, are simultaneously detected and are displayed by a digital tube.