Abstract: A DC electric motor includes an internal programmable element that permits it to be synchronized to an external reference signal. To that end, the motor includes a rotor capable of rotating at a rotational speed, rotor circuitry that controls the rotational speed of the rotor, and an input to receive the noted external reference signal, which indicates a preset speed. In addition, the motor also includes the noted programmable element, which is operatively coupled with the input and the rotor circuitry within the motor. The programmable element is capable of comparing the external reference signal with the rotational speed of the rotor and, consequently, controls the rotor circuitry based upon the comparison of the external reference signal and the rotational speed of the rotor.

Abstract: A DC electric motor includes an internal programmable element that permits it to be synchronized to an external reference signal. To that end, the motor includes a rotor capable of rotating at a rotational speed, rotor circuitry that controls the rotational speed of the rotor, and an input to receive the noted external reference signal, which indicates a preset speed. In addition, the motor also includes the noted programmable element, which is operatively coupled with the input and the rotor circuitry within the motor. The programmable element is capable of comparing the external reference signal with the rotational speed of the rotor and, consequently, controls the rotor circuitry based upon the comparison of the external reference signal and the rotational speed of the rotor.

Abstract: An apparatus for controlling the speed of a motor (having a coil) rotating a load synchronizes the rotational speed of the load with a reference signal. To that end, the apparatus includes a commutation circuit for energizing the coil, a tachometer for detecting the speed that the load is rotating, and a synchronization module that synchronizes the rotation of the load to the reference signal. The tachometer produces a speed signal representing the speed that the load is rotating. The synchronization module includes a reference input that receives the reference signal, a tachometer input that receives the speed signal, a speed control module that compares the reference signal with the speed signal to produce a control signal that controls the commutation circuit, and a commutation circuit output for forwarding the control signal to the commutation circuit, the commutation circuit energizing the coil as specified by the control signal.