Power supply circuit for an electromagnetic coil having low DC a

Details Power supply circuit for an electromagnetic coil having low DC a Power supply circuit for an electromagnetic coil having low DC a

1997-11-18

1999-08-31

Gaffin, Jeffrey

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361189, H01H 4726

Patent

active

059461829

ABSTRACT:
Power supply circuit for a single-winding electromagnet coil (11) comprising a low voltage DC power supply (20) and a high voltage AC power supply (30) both connected to the terminals of the winding (11), together with a switching apparatus (40) connected in series with the high voltage supply (30) and capable of supplying or cutting the high voltage power supply to the winding (11), characterized by the fact that the switching device (40) comprises a thyristor (42) connected between the high voltage source (30) and the winding (11) and a control circuit (43) for the thyristor (42) connected to the gate (G) of the thyristor used to cause the thyristor to conduct when the high voltage source (30) delivers the positive phase of a voltage wave.

REFERENCES:
patent: 4112477 (1978-09-01), Sherwin
patent: 4185315 (1980-01-01), Miller
patent: 4391236 (1983-07-01), Anderson
patent: 4516185 (1985-05-01), Culligan et al.
patent: 4567541 (1986-01-01), Terai
patent: 5734543 (1998-03-01), Turner
Patent Abstracts of Japan, vol. 8, No. 95, (E-242), May 2, 1984 and JP 59 014615 A, Jan. 25, 1984.
Patent Abstracts of Japan, vol. 8, No. 139, (E-253), Jun. 28, 1984 and JP 59 048903 A, Mar. 21, 1984.

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