Abstract: A diagnostic tool may be attached to the control panel of a piece of machinery within a plant or factory which includes an electric motor. The diagnostic tool includes indicators for providing information to an operator of the equipment for which the control panel provides power. These indicator inform the operator of various modes of operation of the control circuitry within the control panel which regulate the power going to the motor. In this manner, the operator may determine if the machinery is ready to run, and if not, if it is necessary to call a technician.

Abstract: A motorized golf cart circuit and apparatus capable of transporting various golf related items including a golf bag carrying golf clubs around a golf course under manual or automatic control is provided. The cart operator is provided with the option of operating the cart either manually by applying pressure to a switch located on the hand grip of the cart apparatus, or automatically in either a timer or a distance travel mode. The timer mode allows the cart operator to send the cart ahead automatically along a straight or curved path set by the operator for a predetermined period of time before the cart circuit automatically turns off. The distance mode of travel allows the cart operator to automatically send the cart ahead, following either a straight or curved path set by the operator for a distance of between 10 and 50 yards. Both the speed and the path of the cart may be varied by the cart operator by turning a balance control knob located on the control panel interface of the golf club cart.

Abstract: Here is disclosed an IC for controlling the spindle motor of a small hard disk drive unit, characteristic in being provided with a voltage detection circuit for a control circuit driving power source, responsive to the voltage at the connecting terminal of the control circuit driving power source for generating a signal to control the operation of the spindle motor; a voltage detection circuit for a motor driving power source, responsive to the voltage at the connecting terminal of the motor driving power source for controlling the operation of the motor; and further provided with a logic circuit for keeping valid the output signal of the voltage detecting circuit for said motor driving power source from the time the voltage at the motor driving power source terminal rises above a prescribed voltage higher than the upper limit of the prescribed voltage range of the control circuit power source until the time it falls below another prescribed voltage lower than the lower limit of said prescribed voltage range.

Abstract: A direct current motor driving device for driving a direct current motor having a plus terminal and a minus terminal, which comprises a direct current source having a plus terminal and a minus terminal, the plus terminal being connected to the plus terminal of the direct current motor, pulse generating device for generating a pulse signal when an input signal to an input terminal of the pulse generating device exceeds a set threshold value, driving device for driving the direct current motor in response to the pulse signal outputted by the pulse generating means, and a first resistance type voltage dividing circuit inserted between the minus terminal of the direct current source and a minus terminal of the direct current motor for providing as the input signal to the pulse generating device a voltage signal produced by resistance-dividing a voltage between these terminals in a first ratio, whereby a counter electromotive force generated by the direct current motor by the rotation of the direct current motor b

Abstract: In accordance with a first embodiment of the invention, line dropout protection is provided for a d.c. motor wherein motor operation is prevented if power is applied at the time a main speed control device is not set in a zero position. Re-enabling motor operation is simply provided by resetting the motor speed control device to a zero position and reapplying power.In accordance with the second embodiment of the invention, line dropout protection is provided for a d.c. motor wherein predetermined excess motor acceleration is prevented when power is applied to the d.c. motor. The instant invention prevents motor start-up under unexpected conditions, thereby clearly enhancing safety during operation of any device controlled by the d.c. motor.

Abstract: Method of controlling at least one electric motor on an offset printing machine by inputting a set point for the rotational speed, which comprises forming a set point for the rotational speed by means of a device for controlling the electric motor, and reducing the value of the set point as a function of a measured line voltage when the line voltage is inadequate.

Abstract: A steering control apparatus for a motor vehicle with steerable front and rear road wheels keeps electric power supplied to an electric motor for turning the rear road wheels, at a desired value even when the voltage of a vehicle-mounted battery for energizing the motor fluctuates. The steering control apparatus includes a battery mounted on the motor vehicle, an electric motor energizable by electric power supplied from the battery for applying power output to at least a steering mechanism for turning the rear road wheels, detecting means for detecting the voltage of the battery, and a motor control unit for controlling operation of the electric motor.

Abstract: A method for operating a DC motor controller according to a first gain when the armature current of the DC motor is discontinuous, according to a second gain when the armature current is continuous, and according to a third gain when the armature current is in transition from the discontinuous to continuous conduction. The gains have proportional and integral terms and the integral term in the discontinuous and transition regions varies inversely to a current reference in the controller.

Abstract: An electronic current sensor and controller for automatically controlling the extension and retraction of a power antenna with the energization and de-energization of an automobile radio receiver.