Switching power source means

Details Switching power source means Switching power source means

1990-05-30

1991-11-05

Stephan, Steven L.

Electric power conversion systems

Current conversion

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

363132, H02M 3337

Patent

active

050634887

ABSTRACT:
A switching power source means comprises a DC voltage source, a first switch element, a low-pass filter connected 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 at 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, to charge and discharge parasitic capacitances of the switch elements, preferably by being provided with a saturable core accompanied by an additional winding supplied with a load current, thus preventing surge currents in the switch elements.

REFERENCES:
patent: 4353112 (1982-10-01), Rietveld et al.
patent: 4464709 (1984-08-01), Barter
patent: 4605997 (1986-08-01), Kirk
patent: 4642750 (1987-02-01), Raets
patent: 4692851 (1987-09-01), Attwood
patent: 4736284 (1988-04-01), Yamagishi et al.
patent: 4768141 (1988-08-01), Hubertus et al.
patent: 4814962 (1989-03-01), Magalhaes et al.
patent: 4926302 (1990-05-01), Harada et al.

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