High frequency power supply microwave oven

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

H - Electricity

05

B

327/2.5

H05B 6/00 (2006.01) F24C 7/02 (2006.01) H03B 9/10 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1074406

HIGH FREQUENCY POWER SUPPLY MICROWAVE OVEN Abstract of the Disclosure 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 vari- ation of the average flux density in the transformer.

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