Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1980-09-17
1982-03-09
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361154, H01H 4732
Patent
active
043193013
ABSTRACT:
An electromagnet control circuit includes a first switching transistor which is connected in series with the electromagnet across a low voltage supply. A second switching transistor is connected to provide a high voltage supply to the electromagnet at switch-on. An inductor is connected by transistors to the low voltage supply and is supplied with current while the first switching transistor is on. At switch-off a diode interconnecting the electromagnet 10 and the inductor allows the inductor current to be diverted through the electromagnet to provide rapid flux decay in the latter.
REFERENCES:
patent: 2951186 (1960-08-01), Dickinson
patent: 3149244 (1964-09-01), Barnes et al.
patent: 3183412 (1965-05-01), Arends
patent: 4142684 (1979-03-01), Schweitzer
Lucas Industries Limited
Moose Jr. Harry E.
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