Microwave oven with invertor control power source

Details Microwave oven with invertor control power source Microwave oven with invertor control power source

H - Electricity

05

B

327/2.5

H05B 6/68 (2006.01) F24C 7/02 (2006.01) G05D 23/26 (2006.01)

Patent

CA 2039372

A microwave oven with an invertor control power source produces a microwave by the use of a magnetron in combination with high frequency power generated by an invertor control power source. Heat sensitive ferrite beads provided on a lead wire for transmitting the high frequency power to the magnetron changes the inductance of the wire from a high level to a low level at around a threshold temperature, which is lower than the working equilibrium temperature of the magnetron. As a result, the cathode filament current remains within the allowable range, and moding of the magnetron is prevented. Thus the lifetime of the magnetron is lengthened.

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