Electricity: motive power systems – Battery-fed motor systems
Patent
1981-03-31
1984-05-08
Rubinson, G. Z.
Electricity: motive power systems
Battery-fed motor systems
318345R, 361 23, H02P 700
Patent
active
044477678
ABSTRACT:
Apparatus is disclosed for controlling the duty ratio of the application of an energization source such as a battery to a load in the form of a motor for driving a vehicle. More particularly, there is disclosed a motor control implemented by solid state devices and more specifically, SCR elements. The apparatus employs a first oscillator circuit for providing a first train of timing pulses, the frequency of which is determined by the position of an operator manipulatable member, e.g. a vehicle accelerator pedal. The first train of pulses is applied to fire a main SCR. Further, there is provided a second oscillator circuit for providing a second train of pulses for controlling the discharging or dumping of the charge stored upon a commutating capacitor across the main SCR, thereby deactuating or commutating the main SCR. The frequency of the first oscillator is adjustable up to a value substantially that of the set frequency of the second oscillator, whereby as the frequency of the first oscillator is increased the number of times that the main SCR is turned ON is likewise increased until at full energization, the main SCR is being turned ON at a maximum rate; the time of energization i.e. the period that the main SCR is fired, is substantially constant regardless of the frequency of pulse duty ratio as established by the first oscillator circuit.
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Barni John J.
Evans Arthur G.
Rubinson G. Z.
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