Microwave heating apparatus for reducing high-frequency in an el

Details Microwave heating apparatus for reducing high-frequency in an el Microwave heating apparatus for reducing high-frequency in an el

1995-11-16

1997-06-17

Leung, Philip H.

Electric heating

Microwave heating

With control system

219702, 363 56, H05B 668

Patent

active

056393954

ABSTRACT:
A microwave heating apparatus is disclosed. The microwave heating apparatus includes: a rectifying section for rectifying an AC current; an inverting section for being turned on/off by the driving signals of a driving section to generate high frequency voltages corresponding to the output signals of the rectifying section; a microwave generating section for receiving the output signals of the inverting section to generate microwaves; a synchronization detecting section for detecting synchronizing signals from the output signals of the inverting section; and a flip flop for being set and reset by the output signals of the synchronization detecting section to control the driving section. The apparatus of the present invention further includes a synchronization control section disposed between the synchronization detecting section and the flip flop, so that the synchronization control section can detect the period of the output signals of the synchronization detecting section to compare it with a reference value so as to reset the flip flop upon encountering a period smaller than the reference value, and so as to prevent the driving section from driving the inverting section.

REFERENCES:
patent: 4171517 (1979-10-01), Higa et al.
patent: 4600823 (1986-07-01), Hiejima
patent: 4766279 (1988-08-01), Park
patent: 4908756 (1990-03-01), Higashino
patent: 4931609 (1990-06-01), Aoki
patent: 5225973 (1993-07-01), Patel et al.
patent: 5227964 (1993-07-01), Furuhata

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