Current control circuit

Details Current control circuit Current control circuit

1984-07-09

1985-10-15

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318331, 318345F, 361 31, H02P 512

Patent

active

045477159

ABSTRACT:
An overcurrent protection circuit for inductive loads such as motors is provided. A source voltage is input to a divider circuit including semiconductor switching devices. The inductive load is also connected to the voltage source through the divider circuit. A voltage output from the divider circuit which is proportional to the current through the inductive load is input to a comparator circuit. Another input to the comparator circuit comprises a reference voltage selected to correspond to the maximum desired current through the inductive load. If the comparator circuit senses that the current through the inductive load is greater than the predetermined maximum current, it provides an output to a pulse generator device. The output from the pulse generator device is input to a switching circuit which can cut off the voltage source supply to the inductive load.

REFERENCES:
patent: 3538426 (1970-11-01), Jones
patent: 3643151 (1972-02-01), Matsushima et al.
patent: 4177492 (1979-12-01), Noddings et al.
patent: 4359652 (1982-11-01), Jarrett et al.

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