Noise and loss free drive for brushless synchronous motor

摘要

The drive arrangement drives the channels of single- or multi-phase motors via electronic switching elements. The control signal for switching off the commutation of the phase currents for one and two phase motors does not immediately follow the null crossing of the induced voltage but is offset by a difference angle. For three-phase motors the control signal does not immediately follow a pulse switch-on period of 120 degrees in the current channel but is offset by a difference angle.