a-c/d-c microwave oven

Details a-c/d-c microwave oven a-c/d-c microwave oven

1991-05-02

1993-08-17

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1055F, 363 15, 363 19, 323207, H05B 666

Patent

active

052371409

ABSTRACT:
An a-c/d-c microwave oven adapted to be connected to an a-c and/or d-c power source. The oven has an inverter for converting d-c power to a-c power to feed power to a magnetron generating high-frequency energy via a transformer. Input from the d-c and a-c power sources is selectively fed to the magnetron. A first primary winding is fed commercial a-c power. A second primary winding is fed on a-c voltage from the inverter. A secondary winding connecting to the magnetron is wound on the transformer. A predetermined voltage is adjusted in the secondary winding of the transformer by adjusting the frequency of the a-c voltage from the inverter at a higher level than the commercial a-c power, which is fed to the second primary winding.

REFERENCES:
patent: 3584288 (1971-06-01), Boehm
patent: 3665495 (1972-05-01), Carter et al.
patent: 4777575 (1988-10-01), Yamato et al.
patent: 4843202 (1989-06-01), Smith et al.
patent: 4888461 (1989-12-01), Takano
patent: 4904837 (1990-02-01), Low et al.
patent: 4928055 (1990-05-01), Kaieda et al.

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