Protective device for electric motor, and drive device has electric motor comprising such a protection device

摘要

The protection device is adapted to be placed in the power supply circuit of the engine comprises at least one coil of - disturbance of the motor and a thermal switch (10) thermally coupled to the coil (20, 30) and able to open the circuit when the temperature of the coil as it detects reaches a predetermined value, which is representative of a maximum threshold temperature is authorised in the motor. & br / advantageously, the device further comprises an electric heating element, which is thermally coupled to the switch and adapted to constitute a main current path between the two input terminals of a quadripole constituted by the protection device, when the power supply circuit is open and to keep open the circuit for limiting the opening cycle - closing the switch. & br / the invention also relates to the corresponding method and a drive device comprising a motor and a protection device of this type, mounted on the engine, to the outside of the -.