Inverter microwave oven and method for controlling the same

Details Inverter microwave oven and method for controlling the same Inverter microwave oven and method for controlling the same

2006-06-20

2006-06-20

Robinson, Daniel (Department: 3742)

Electric heating

Microwave heating

With control system

C219S702000, C219S718000

Reexamination Certificate

active

07064306

ABSTRACT:
Disclosed herein are an inverter microwave oven and a method for controlling the same, wherein a switching frequency of an inverter is raised during the initial operation of the microwave oven and then lowered during the normal operation of the oven after the lapse of a predetermined time, so as to prevent overvoltage from being applied to a magnetron, which generates electromagnetic waves, during the initial operation, thereby enhancing durability and operational reliability of the inverter. The inverter microwave oven comprises a rectifier for rectifying and smoothing a commercial AC voltage into a DC voltage. The inverter is adapted to perform a switching operation based on the DC voltage from the rectifier to generate a magnetron drive AC voltage. The microwave oven further comprises a magnetron driver for converting the AC voltage from the inverter into a high-power DC voltage and applying the converted DC voltage to the magnetron, and an inverter control unit for varying the switching frequency of the inverter to prevent overvoltage from being applied to the magnetron.

REFERENCES:
patent: 4777575 (1988-10-01), Yamato et al.
patent: 6084226 (2000-07-01), Greene et al.
patent: 6288379 (2001-09-01), Greene et al.
patent: 6313450 (2001-11-01), Han et al.
patent: 6448541 (2002-09-01), Lim
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patent: 2004/0144776 (2004-07-01), Han et al.
patent: 10-2002-0010195 (2002-02-01), None
English Language Abstract of KR 10-2002-0010195.

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