Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1984-02-16
1986-11-11
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 21, 363147, 361400, H02M 5458, H02M 3335
Patent
active
046226273
ABSTRACT:
Electrical switching power supply for microprocessors and the like comprising a high voltage d.c. source (30, 34, 32, 50) resonant circuit (38, 51, 42, 52) including a switching transistor (52) which is operated in Megahertz range and provides pulses, via a transformer (40), rectifier (56), smoothing choke (62) to a d.c. low voltage output terminal (66). The rate of switching is controlled by a pulse generator (54) which pulses variably in response to output voltage to thereby vary switching repetition rate and hold to a predetermined output voltage. The inductive elements use spirals (12A and 12A') of thin lines on the surface of a substrate board and ferrite plugs (20) passing through holes (22) in the board to provide miniature inductive elements built into the substrate for effective use in a microprocessor power supply, or the like, and in other applications. Power dissipating elements on the circuit are mounted to a common thermal ground (29) and the circuit as a whole, including such thermal ground is encapsulated to provide a plate form power supply.
REFERENCES:
patent: 2896028 (1959-07-01), Mackey
patent: 4383292 (1983-05-01), Onodera et al.
patent: 4455545 (1984-06-01), Shelly
Miura et al., "New Power Supply for Audio Power Amplifiers," IEEE Trans. Consum. Electron. (USA), vol. CE-24, No. 3, pp. 291-299, (Aug. 1978).
Stephens et al., "Cost Effective Switched Mode Power Supplies," New Electron. (G.B.) vol. 12, No. 12, pp. 84+87, Jun. 12, 1979.
Pelly et al., "Power MOSFETs Take the Load off Switching Supply Design," Electronic Design, pp. 135-139, Feb. 17, 1983.
Estrov Alexander
Rodriguez Edward
Beha Jr. William H.
Cohen Jerry
Oliverio M. Lawrence
Theta-J Corporation
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