Method for effecting the power-optimal control of bldc motors

摘要

A method for a power optimal control of a BLDC motor by continuously updated commutation points and circuit assembly for a power optimal control of a BLDC motor. The method includes measuring a time difference (DeltaT) between two immediately subsequent zero crossings (TN 1 , TN 2 ) of first and second motor phases, and performing a commutation of an immediately next motor phase after substantially one-half of the time difference (DeltaT/2) elapses after the zero crossing of the second motor phase (TN 2 ). The commutation is performed for all phases in a continuous manner in accordance with a switching algorithm (T_commutation=TN 2+ (DeltaT/2)).