Method to commutate an electronic commutated brushless multi-phase permanent magnet motor

摘要

The method involves determining the rotor position relative to the stator and the rotary field rotating within it using the intrinsic induction in at least one motor winding (1,2) and adapting the application of an external voltage to the motor winding according to the detected rotor position. The period from a time at which the winding current (5,6) in at least one motor winding reaches null (0) after switching of the voltage to the time of the null crossing of the voltage (7,8) induced in this winding is measured and the external voltage is re-applied to this winding depending on this time.