Method for determining correct phasing of a three-phase brushless DC motor

摘要

A method for correctly connecting the wiring for the hall effect sensors and the motor phase terminals of a three-phase brushless DC motor to the corresponding connections on an amplifier, the method using known waveforms that describe the electrical operational characteristics of the motor and amplifier. The method comprising connecting the hall effect sensors in any order, determining two motor phase terminals that correspond to a back-electro-magnetic-force peak in the middle of a waveform for a first hall effect sensor and a third motor phase terminal that does not, determining an amplifier pin that does not carry current during the middle of a wave form for a first hall sensor input on the amplifier. The correct connection is thus determined to be between the third motor phase terminal and the identified amplifier pin. The remaining connections are determined in the same manner by repeating this process, but in relation to the other hall effect sensor waveforms.