Abstract: The present invention provides a motor driving device without an additional signal line for identifying whether a motor rotates stably. The motor driving device (21) includes a control circuit (100) for receiving an acceleration signal (SU) and a deceleration signal (SD), and generating a driver control signal (S10); a driving circuit (200) for generating a motor driving signal (S3) according to the driver control signal (S10); and a phase-locked identifying circuit (500) for monitoring an input mode of the acceleration signal (SU) and the deceleration signal (SD), and identifying whether the motor rotation speed is stable at the desired target rotation speed.

Abstract: The present invention provides a motor driving device for easily and accurately detecting an abnormal status of a motor. The motor driving device (21) includes a control circuit (100) for generating a driver control signal (S10); a driving circuit (200) for generating a motor driving signal (S3) according to the driver control signal (S10); an initial position detecting circuit (300) for detecting an initial position of a motor (22); and a rotation detecting circuit (400) for detecting a rotation status of the motor (22). Before the motor (22) starts to rotate normally, the control circuit (100) repeatedly performs a serial activation processing including detecting an initial position; applying an initial torque and detecting a motor rotation, and when the repetition number reaches a threshold value “m” (for example, m=5), the motor (22) is forced stop.

Abstract: A rotation control apparatus includes: a controller configured to supply test currents to a plurality of different paths of a motor when the motor is stopped; and a stop position detector configured to detect a rotational position of the motor based on an order of current values of the test currents. The controller causes one of the test currents to flow through one of the plurality of different paths, measure time taken until the corresponding detection voltage reaches a reference voltage, and set electrical conduction time of the test currents based on a result of the measurement.

Abstract: The present invention provides a motor driving device for easily and accurately detecting an abnormal status of a motor. The motor driving device (21) includes a control circuit (100) for generating a driver control signal (S10); a driving circuit (200) for generating a motor driving signal (S3) according to the driver control signal (S10); an initial position detecting circuit (300) for detecting an initial position of a motor (22); and a rotation detecting circuit (400) for detecting a rotation status of the motor (22). Before the motor (22) starts to rotate normally, the control circuit (100) repeatedly performs a serial activation processing including detecting an initial position; applying an initial torque and detecting a motor rotation, and when the repetition number reaches a threshold value “m” (for example, m=5), the motor (22) is forced stop.

Abstract: The present invention provides a motor driving device without an additional signal line for identifying whether a motor rotates stably. The motor driving device (21) includes a control circuit (100) for receiving an acceleration signal (SU) and a deceleration signal (SD), and generating a driver control signal (S10); a driving circuit (200) for generating a motor driving signal (S3) according to the driver control signal (S10); and a phase-locked identifying circuit (500) for monitoring an input mode of the acceleration signal (SU) and the deceleration signal (SD), and identifying whether the motor rotation speed is stable at the desired target rotation speed.