Motor control circuit, motor control system and motor control method

A motor control system comprising:

• a motor;
• a sensor configured to detect a rotational position of the motor and output a sensor signal;
• a rotational position decoding unit configured to generate a rotational position signal representing the rotational position of the motor according to the sensor signal;
• a rotational position determining unit configured to store a current rotational position of the motor based on the rotational position signal, wherein when the rotational position signal represents a subsequent rotational position of the stored current rotational position, the rotational position determining unit updates the stored current rotational position with the subsequent rotational position, and generates a motor control signal representing the subsequent rotational position;
• and
• a motor drive signal generating unit configured to generate a motor drive signal for driving the motor according to the motor control signal.

A motor control method configured to control a motor according to a rotational position of the motor detected by a sensor, the motor control method comprising:

• generating a rotational position signal representing the rotational position of the motor according to a sensor signal provided by the sensor;
• storing a current rotational position of the motor based on the rotational position signal, and wherein when the rotational position signal represents a subsequent rotational position of the stored current rotational position, the stored current rotational position is updated with the subsequent rotational position, and a motor control signal representing the subsequent rotational position is generated;
• and
• generating a motor drive signal for driving the motor according to the motor control signal.