DC BRUSHLESS MOTOR ROTOR POSITION DETECTION METHOD

摘要

A DC brushless motor rotor position detection method, belonging to the field of motor control. The method comprises: detecting a level signal detected by a Hall position sensor connected to a DC brushless motor; when it is detected that the level signal at the current moment and the level signal at the previous moment change, determining that the motor commutation action occurs, and the motor enters a phase region (x mod 6)+1 from a phase region x in the current period, wherein x∈{1，2，3，4，5，6}; and compensating the duration of the phase region x of a rotor in the current period by using the difference between the actual phase region angle of the phase region x of the rotor in the previous period and the ideal phase region angle of 60° to obtain the real commutation information of the motor. In the high-speed operation process of the motor, the motor rotor position signal transmitted by the Hall sensor can be rapidly and accurately obtained by using the method, so that the commutation position of the rotor is rapidly and accurately positioned, and accurate control over the motor in the high-speed working state is realized.