Motor drive circuit with electronic fault protection

Details Motor drive circuit with electronic fault protection Motor drive circuit with electronic fault protection

1992-01-29

1993-09-14

Wysocki, Jonathan

Electricity: motive power systems

Automatic and/or with time-delay means

With nonautomatic control means

361 23, 361190, H02P 100

Patent

active

052452603

ABSTRACT:
An appliance provided with an electric motor and a circuit for driving the electric motor. The drive circuit includes a first pulse switch (S1) for generating a first pulse and a first switching device (.mu.C, T) having a holding capability and which performs a first switching function in response to the first pulse. A second pulse switch (S2) generates a second pulse. A second switching device (Th, R) having a holding capability performs a second switching function in response to the second pulse. A main switching device switches the electric motor. The first switching function in combination with the second switching fucntion are adapted to control the main switching device. Optionally, the circuit may include a control device (Tr) for controlling the electric motor and a third pulse switch (S3) for resetting the first switching function.

REFERENCES:
patent: 3554343 (1971-01-01), Calvert et al.
patent: 3700914 (1972-10-01), Granieri et al.
patent: 3781622 (1973-12-01), Acton et al.
patent: 3800205 (1974-03-01), Zalar
patent: 3840322 (1974-10-01), Cade
patent: 4107645 (1978-08-01), Lewis et al.
patent: 4251848 (1981-02-01), Dogadko et al.
patent: 4636697 (1987-01-01), Kunikawa
patent: 4774443 (1988-09-01), Herzig
patent: 4983897 (1991-01-01), Tennant

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