Magnetron power supply and control circuit

Details Magnetron power supply and control circuit Magnetron power supply and control circuit

1974-11-21

1976-06-01

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

321 15, H05B 906

Patent

active

039611523

ABSTRACT:
A counter-top microwave oven comprises an upstanding box-like metal wall structure defining a heating cavity, a microwave generator including a voltage quadrupler power supply, and transmission means including a probe antenna for radiating the microwaves into the heating cavity, the cavity being so dimensioned and the antenna being so positioned as to excite in said cavity preferred electromagnetic field modes for establishing preferred field patterns to achieve uniform heating of a variety of foods. The power supply includes capacitive and inductive means, having values designed to optimize the power factor, and switching means for selectively switching between low and high power modes. The heating cavity is dimensioned to produce two complementary modes of which establish an undistorted field pattern providing uniform heating over a distance greater than a wavelength of the source microwave energy, tuning means being provided to tune undesired modes off resonance.

REFERENCES:
patent: 3046466 (1962-07-01), Tyrrell et al.
patent: 3129312 (1964-04-01), Ojelid
patent: 3308390 (1967-03-01), Crapuchettes
patent: 3651371 (1972-03-01), Tingley
patent: 3684978 (1972-08-01), Otaguao
patent: 3821594 (1974-06-01), Webb et al.

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