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

A method for correctly connecting a three-phase brushless DC motor to an amplifier;

• the motor comprising a rotor, three hall sensors, and three motor phase terminals;
• the amplifier comprising three hall sensor inputs, and three amplifier phase connections;
• the method steps comprising:
• connect the three hall sensors to the three hall sensor inputs, whereby a first hall sensor is connected to a first hall sensor input, a second hall sensor is connected to a second hall sensor input, and a third hall sensor is connected to a third hall sensor input;
• identify a first portion of a rotor's electrical cycle corresponding to a middle of a peak for an output signal from the first hall sensor;
• identify a first pair of the three motor phase terminals for which there is a peak back-electro-motive-force during the first portion of the rotor's electrical cycle, the first pair of motor phase terminals comprising a second and a third motor phase terminal, and whereby a first motor phase terminal is different from the second and third motor phase terminals;
• identify the first portion of the rotor's electrical cycle corresponding to a middle of a peak for an input signal for the first hall sensor input;
• identify a first amplifier phase connection, of the three amplifier phase connections, through which no electric current flows during the first portion of the rotor's electrical cycle;
• and
• connect the first motor phase terminal to the first amplifier phase connection.