Motor driver and control method

A motor driver for driving a motor, the driver comprising:

• a motor current phase detector configured to detect a motor current phase in response to a motor current phase signal received and output a result of the detection as motor current phase information;
• a motor phase detector configured to detect a motor phase in response to a motor phase signal received and output a result of the detection as motor phase information;
• a phase correction value calculator configured to calculate a correction value based on a difference between the motor current phase information and the motor phase information and output a result of the calculation as compensation information;
• and
• a motor applied voltage calculator configured to calculate a motor applied voltage representing a voltage to be applied to the motor based on the compensation information and motor phase information received and output a result of the calculation as a phase-compensated motor applied voltage signal,
• wherein the phase correction value calculator calculates the correction value based on a difference between the motor current phase information and compensated motor phase information and outputs a result of the calculation as compensation information, and
• the motor applied voltage calculator outputs the compensated motor phase information based on the compensation information and motor phase information received, calculates the motor applied voltage representing the voltage to be applied to the motor, and outputs a result of the calculation as the phase-compensated motor applied voltage signal.

A method of controlling a motor, the method comprising the steps of:

• i) detecting a motor current phase in response to a motor current phase signal received and outputting a result of the detection as motor current phase information;
• ii) detecting a motor phase in response to a motor phase signal received and outputting a result of the detection as motor phase information;
• iii) calculating a correction value based on a difference between the motor current phase information and the motor phase information and outputting a result of the calculation as compensation information;
• and
• iv) calculating a motor applied voltage representing a voltage to be applied to the motor based on the compensation information and motor phase information received and outputting a result of the calculation as a phase-compensated motor applied voltage signal,
• wherein the step iii) includes:
• detecting a phase difference as a phase lead, a phase lag or a phase match based on the difference between the motor current phase information and the motor phase information, and outputting a result of the detection as phase difference information;
• and
• calculating the correction value by accumulating the phase difference information received and outputting a result of the calculation as the compensation information.

A method of controlling a motor, the method comprising the steps of:

• i) detecting a motor current phase in response to a motor current phase signal received and outputting a result of the detection as motor current phase information;
• ii) detecting a motor phase in response to a motor phase signal received and outputting a result of the detection as motor phase information;
• iii) calculating a correction value based on a difference between the motor current phase information and the motor phase information and outputting a result of the calculation as compensation information;
• and
• iv) calculating a motor applied voltage representing a voltage to be applied to the motor based on the compensation information and motor phase information received and outputting a result of the calculation as a phase-compensated motor applied voltage signal,
• wherein the step iii) includes calculating the correction value based on a difference between the motor current phase information and compensated motor phase information and outputting a result of the calculation as compensation information, and
• the step iv) includes outputting the compensated motor phase information based on the compensation information and motor phase information received, calculating the motor applied voltage representing the voltage to be applied to the motor, and outputting a result of the calculation as the phase-compensated motor applied voltage signal.