Inverter-type microwave oven power supply

Details Inverter-type microwave oven power supply Inverter-type microwave oven power supply

1984-12-10

1987-07-14

Chatmon, Saxfield

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Delayed application of the discharge potential

219 1055B, 363115, 323271, 315105, H05B 3900, H05B 4114

Patent

active

046805060

ABSTRACT:
In a power-line-operated inverter-type power supply for the magnetron in a microwave oven, power is provided to the magnetron from the inverter by way of a series-excited resonant LC circuit, the magnetron load being connected in parallel with the tank capacitor of this L-C circuit. This arrangement provides for good matching between the output characteristics of the inverter and the operating characteristics of the magnetron. To prevent potentially destructive overload of the inverter, as may occur if the inverter's output voltage is series-applied to the resonant L-C circuit before the magnetron is ready to absorb power, inverter oscillation is not initiated until after the magnetron cathode has been heated to incandescence.

REFERENCES:
patent: 3508004 (1971-03-01), Parker
patent: 3549942 (1970-12-01), Nijholt
patent: 3973165 (1976-08-01), Hester
patent: 4002875 (1977-01-01), Kiuchi et al.
patent: 4125751 (1978-11-01), Brown
patent: 4142082 (1979-02-01), Israel
patent: 4215292 (1980-07-01), Inui et al.
patent: 4281372 (1981-07-01), Kornrumpf
patent: 4481447 (1984-11-01), Stupps et al.

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