High power electric generator, especially adapted for powering p

Details High power electric generator, especially adapted for powering p High power electric generator, especially adapted for powering p

1981-12-16

1984-05-01

Beha, Jr., William H.

Industrial electric heating furnaces

Plasma furnace device

Direct furnace

219121PT, 363 28, 363 79, H05H 124, H02P 1322

Patent

active

044465602

ABSTRACT:
A high power generator for an ion discharge device used for the thermal treatment of metals in a rarified gaseous atmosphere. A variable width pulse generator is used to vary the input power to an inductance means. The frequency of the input pulses is held constant, while the pulse width is varied. An arc protection circuit is provided to sense and prevent an incipient arc across the secondary of the transformer. The arc protection circuit includes a voltage detector and a current detector with logic means to sense an under voltage-over current condition that presages the beginning of an arc. A second embodiment is disclosed which uses two circuits in parallel to drive the ion generator. One circuit is charged while the other is discharged. A third embodiment is disclosed which was a thyristor network for selectively loading the primary circuits of a pair of inductance circuits in response to an inductance-capacitance time constant.

REFERENCES:
patent: 3562623 (1971-02-01), Farnsworth
patent: 3697853 (1972-10-01), Nowell et al.
patent: 3914575 (1975-10-01), Eichler
patent: 4195333 (1980-03-01), Hedel
Review of The Electrical Communication Laboratories, vol. 22, No. 9, pp. 818-826, (Japan), Sep./Oct. 1974.

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