This control device controls a buffer motor supplied with power from a power source that is shared with a drive motor driving an industrial machine, the control device comprising: a motor speed specifying unit that specifies the current speed of the buffer motor; an emergency stop detection unit that detects an emergency stop state; a buffer motor command generation unit that establishes, as an initial speed, the speed of the buffer motor at a prescribed timing after the detection of the release of the emergency stop by the emergency stop detection unit specified by the motor speed specifying unit, and generates a command for returning the speed of the buffer motor to a predetermined base speed at a predetermined prescribed acceleration; and a buffer motor control unit that controls the buffer motor on the basis of the command generated by the buffer motor command generation unit.

A motor control system of the present invention includes a servo electricity supply unit supplying electricity to a servo motor, and a controller controlling the servo motor, a mechanical brake and the servo electricity supply unit. The controller controls the servo electricity supply unit to stop the supply of electricity to the servo motor when a signal receiving unit receives a signal for actuating the mechanical brake and to resume the supply of electricity to the servo motor when an abnormality determining unit determines that abnormality exists in the mechanical brake.

A motor control system of the present invention includes a servo electricity supply unit supplying electricity to a servo motor, and a controller controlling the servo motor, a mechanical brake and the servo electricity supply unit. The controller controls the servo electricity supply unit to stop the supply of electricity to the servo motor when a signal receiving unit receives a signal for actuating the mechanical brake and to resume the supply of electricity to the servo motor when an abnormality determining unit determines that abnormality exists in the mechanical brake.

This control device controls a buffer motor supplied with power from a power source that is shared with a drive motor driving an industrial machine, the control device comprising: a motor speed specifying unit that specifies the current speed of the buffer motor; an emergency stop detection unit that detects an emergency stop state; a buffer motor command generation unit that establishes, as an initial speed, the speed of the buffer motor at a prescribed timing after the detection of the release of the emergency stop by the emergency stop detection unit specified by the motor speed specifying unit, and generates a command for returning the speed of the buffer motor to a predetermined base speed at a predetermined prescribed acceleration; and a buffer motor control unit that controls the buffer motor on the basis of the command generated by the buffer motor command generation unit.