Motor driving control apparatus and motor driving control method

A motor driving control apparatus comprising:

• a motor driving unit that selectively energizes three-phase coils of a motor;
• a motor control unit that switches an energizing phase of the three-phase coils, the energizing phase being a phase to which the motor driving unit energizes, in a predetermined order by outputting a driving control signal to the motor driving unit;
• a brake control unit that outputs a brake control signal;
• an interphase short-circuiting unit that is connected between two-phase coils of the three-phase coils, and that short-circuits the two-phase coils in response to a short-circuiting signal;
• and
• a short-circuiting signal output unit that is connected between the interphase short-circuiting unit and one-phase coil that is different from each of the two-phase coils of the three-phase coils, and that outputs the short-circuiting signal to the interphase short-circuiting unit when the brake control signal is received, wherein
• the brake control unit comprises:
• a power supply interruption detecting circuit that detects an interruption of power supply from a power source supplying power to the motor;
• a counter electromotive force detecting circuit that detects a counter electromotive force generated in the one-phase coil;
• a first brake control circuit that switches to apply brake or not to apply brake to the motor based on a detection result of an interruption of the power supply, the detection result being detected by the power supply interruption detecting circuit;
• and
• a second brake control circuit that outputs the brake control signal using the counter electromotive force detected by the counter electromotive force detecting circuit, and
• the brake control unit outputs the brake control signal when the power supply interruption detecting circuit detects an interruption of the power supply while the motor driving unit is driving the motor.

A motor driving control apparatus comprising:

• a motor driving unit that selectively energizes three-phase coils of a motor;
• a motor control unit that switches an energizing phase of the three-phase coils, the energizing phase being a phase to which the motor driving unit energizes, in a predetermined order by outputting a driving control signal to the motor driving unit;
• a brake control unit that outputs a brake control signal;
• an interphase short-circuiting unit that is connected between two-phase coils of the three-phase coils, and that short-circuits the two-phase coils in response to a short-circuiting signal;
• and
• a short-circuiting signal output unit that is connected between the interphase short-circuiting unit and one-phase coil that is different from each of the two-phase coils of the three-phase coils, and that outputs the short-circuiting signal to the interphase short-circuiting unit when the brake control signal is received, wherein
• the motor control unit outputs a brake command signal for braking rotation of the motor while the motor driving unit is not driving the motor, and
• the brake control unit comprises:
• a counter electromotive force detecting circuit that detects a counter electromotive force generated in the one-phase coil;
• and
• a third brake control circuit that outputs, when the brake command signal is received and the counter electromotive force detecting circuit detects a counter electromotive force, the brake control signal using the counter electromotive force.