High frequency power supply microwave oven

Details High frequency power supply microwave oven High frequency power supply microwave oven

1977-06-27

1979-02-27

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

323 17, H05B 906

Patent

active

041420829

ABSTRACT:
A microwave oven having a magnetron wave energy supply energized by high voltage pulses at a superaudible frequency wherein the voltage pulses are produced by a decreasing portion of a magnetic flux cycle of said frequency in a transformer added to a voltage on a capacitance whose charge is replenished during a portion of said cycle during which a semiconductor switch connects a winding of the transformer to a source of unidirectional voltage to increase the flux in the transformer thereby energizing the magnetron with voltage pulses from a supply having a substantially constant current characteristic and permitting variation of the constant current level by variation of the average flux density in the transformer.

REFERENCES:
patent: 2919414 (1959-12-01), Neitzert
patent: 3374443 (1968-03-01), Braum et al.
patent: 3611211 (1971-10-01), Theodore
patent: 3671847 (1972-06-01), Shiband
patent: 3710065 (1973-01-01), Crapuchettes
patent: 3740640 (1973-06-01), Ravas et al.
patent: 3780252 (1973-12-01), Crapuchettes
patent: 3889173 (1975-06-01), Klusmann et al.
patent: 3902099 (1975-08-01), Feinberg
patent: 3973165 (1976-08-01), Hester

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