Switching power source means

Details Switching power source means Switching power source means

1989-03-14

1991-06-25

Stephan, Steven L.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 21, H02M 3335

Patent

active

050272632

ABSTRACT:
A switching power source means comprises a DC voltage source, a first switch element, a low-pass filter connectable to the DC voltage source through the first switch element, and a second switch element connected to the input end of the low-pass filter, the switch elements being coupled to the DC voltage source either directly or through a transformer and being operable in such a manner that an output of DC or AC of a desired frequency can be derived across the output end of the low-pass filter. With the invention, a reactor is connected in parallel across the input end of the low-pass filter, which reactor being is adapted to charge and discharge parasitic capacitances of the switch elements, thus preventing surge currents in the switch elements.

REFERENCES:
patent: 4605997 (1986-08-01), Kirk
patent: 4642150 (1987-02-01), Raets
patent: 4692851 (1987-09-01), Attwood
patent: 4736284 (1988-04-01), Yamagishi et al.
patent: 4745536 (1988-05-01), Hirose et al.
patent: 4768141 (1988-08-01), Hubertus et al.
patent: 4814962 (1989-03-01), Magalhaes et al.
Koosuke Harada, Tamotsu Ninomiya and Michio Kohno "Optimum Design of an RC Snubber for a Switching Regulator by Means of the Root Locus Method", pp. 158-167, 1978.
Koosuke Harada and Katsuaki Murata "Ferroresonant Converters with High-Frequency Drive" pp. 355-359, 1983.
Kwang-Hwa Liu and Fred C. Lee "Zero-Voltage Switching Technique in DC/DC Converters", pp. 58-70, 1986.
O. D. Patterson and D. M. Divan "Pseudo-Resonant Full Bridge DC/DC Converter", pp. 424-430, 1987.
Nobuyoshi Nagagata, "Regenerative Control of Secondary Energy for Switching Power Supplies" Publication of Inductive Products Div. Matsushita Electronic Components Co., Ltd. PE88-38, 9/88.

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