BigPatents India

The invention relates to a method wherein the signals (SW1,Sw2,Sw3) controlling the power supply (10) of the phase windings (4) of the motor consist of signals (So1,So2,So3) that are out-of-phase by a phase angle (&phis;) which is continuously variable in relation to synchronisation signals (Si1,Si2,Si3) generated by sensors (1) detecting the position of the rotor. According to the method, a processing unit (5) comprises inlets (8) for receiving the synchronisation signals and outlets (6, 7) for transmitting the out-of-phase signals. The synchronisation signals are binary signals presenting synchronisation fronts and the rising and falling fronts of the out-of-phase signals are generated, following a level switching time depending at least on the phase angle, from at least one reference front selected from the synchronisation fronts such that the switching time is minimum. No. of Pages : 38 No. of Claims : 22