Polyphase stator DC motor - has hall generators controlling commutation and amplifiers for commutation time shift

摘要

The direct current motor with a polyphase stator has Hall generators controlling its commutation, each Hall generator being connected by its Hall electrode to an amplifier. The amplifiers are each coupled to a selection circuit that controls the commutation of the stator winding current. The amplifiers have a high gain, or a flip-flop characteristic, and at least n-1 of them have their outputs cyclically connected over a variable resistor, to the input of the amplifier connected to the neighbouring phase Hall generator. This commutation circuit allows the commutation point i.e. the switching points of the various semiconductor elements, to be shifted in time.