Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Discharge device and/or rectifier in the cathode or heater...
Patent
1989-06-12
1990-09-11
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Discharge device and/or rectifier in the cathode or heater...
315172, 315272, 315105, H05B 3900, H05B 4114, H05B 664, H02M 3335
Patent
active
049565818
ABSTRACT:
In a microwave oven, a magnetron is powered by way of a self-oscillating flyback converter circuit, which operates at a conversion frequency controllable over a range of frequencies up to about 35 kHz. The converter circuit is powered from a DC voltage derived from full-wave-rectification and filtering of ordinary 120 Volt/60 Hz power line voltage. The output of the converter is applied to the magnetron by way of a flyback transformer.
In one preferred configuration, the output fromthe flyback transformer is applied dirrectly to the magnetron--without the use of an intermediary rectifier. As a result, current to the magnetron is provided inthe form of triangularly-shaped pulses with a duty-cycle of about 60% and with a crest-factor of less than 3.5.
In a second preferred configuration, the output from the flyback transformer is rectified and filtered by a capacitor-inductor combination, with the result of providing a nearly constant-magnitude current to the magnetron.
REFERENCES:
patent: 3392309 (1968-07-01), Hickman
patent: 3651371 (1972-03-01), Tingley
patent: 3902099 (1975-08-01), Feinberg
patent: 4318165 (1982-03-01), Kornrumpf et al.
patent: 4882663 (1989-11-01), Nilssen
Bulliard et al, "Light-Operated Solid State Switch for Pulsed Microwave Power Generator," Rev. Sci. Instrum., Nov. 1980, pp. 1571-1572.
LaRoche Eugene R.
Shingleton Michael B.
LandOfFree
Flyback converter microwave oven power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flyback converter microwave oven power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flyback converter microwave oven power supply will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1186609