Oscillators – With magnetically controlled space discharge device
Patent
1990-03-29
1991-08-27
Grimm, Siegfried H.
Oscillators
With magnetically controlled space discharge device
331113A, 331117FE, 331185, 363131, H02M 75383
Patent
active
050436805
ABSTRACT:
A magnetron is powered via an output transformer TR whose primary winding (a) is connected in series with a resonant converter oscillator circuit comprising an inductor (L) and a capacitor (C3) and switching transistors (T.sub.1, T.sub.2) which are connected to positive and negative power supply terminals and are switched by respective current transformers (CT1, CT2). The switching points of the switching transistors are varied so as to vary the output of the circuit by varying the positive and negative flux excursions in the cores of the transformers (CT1, CT2) such that the net flux excursions are sufficient to saturate the transformers and switch off the switching transistors at a predetermined point in each half cycle. The relative positive and negative flux excursions in the transformer cores are controlled by providing additional windings (g) which are connected to a control circuit whcih rectifies the output of these windings and controls the rectified DC voltage appearing across them.
REFERENCES:
patent: 4677345 (1987-06-01), Nilssen
patent: 4872100 (1989-10-01), Diaz
patent: 4873408 (1989-10-01), Smith et al.
Sebastian et al., "Regulated Self-Oscillating Resonant Converters", Second European Conference on Power Electronics and Applications, Grenoble-France, Sep. 22-24, 1987, pp. 245-249.
Aktiebolaget Electrolux
Grimm Siegfried H.
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