Microwave oven

Details Microwave oven Microwave oven

H - Electricity

05

B

327/2.5

H05B 6/70 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1236173

: 8 : ABSTRACT OF THE DISCLOSURE MICROWAVE OVEN A microwave oven has a standard control circuit and magnetron. To enable the oven to operate from a 24V d.c. battery power supply, such as that of a lorry, car, etc, the oven includes a 50 Hz inverter and a transformer for generating an a.c. power supply of mains frequency and voltage to drive a fan motor and a timer motor in the circuit, and a 150 Hz inverter and another transformer for generating an a.c. power supply of higher frequency and different voltages to drive the magnetron and its associated heater. The oven also includes a battery sensing circuit, which senses fluctuations in the battery voltage level and a control adjusts current to the magnetron accordingly. The control also de-energises the magnetron if the battery voltage level goes low.

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