Electric heating – Metal heating – By arc
Patent
1992-10-02
1995-05-09
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912157, 2191304, 21912148, 602031, B23K 9073, B23K 9067
Patent
active
054142385
ABSTRACT:
A power supply for a thruster for space applications (e.g., an arcjet thruster) comprises a series/parallel resonant converter wherein the load quality (Q) factor of the resonant tank circuit inherently varies with arc voltage so as to accommodate changes in arc voltage from initiation thereof through steady-state operation. Effectively, the resonant tank circuit acts as a ballast by matching the arc during initiation thereof through steady-state operation. Furthermore, the resonant converter operates in a soft-switching, low-voltage switched mode so as to maximize efficiency.
REFERENCES:
patent: 4642745 (1987-02-01), Steigerwald et al.
patent: 4766724 (1988-08-01), Gruber
patent: 5225658 (1993-07-01), Yamaguchi et al.
R. L. Steigerwald, "A Comparison of Half-Bridge Resonant Converter Topologies", IEEE Transactions on Power Electronics, vol. 3, No. 2, Apr. 1988.
Park John N.
Steigerwald Robert L.
Berard C. A.
Breedlove J. M.
Martin Marietta Corporation
Meise W. H.
Paschall Mark H.
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