Switching power source means

Details Switching power source means Switching power source means

H - Electricity

02

H

323/6, 323/9

H02H 9/02 (2006.01) H02M 7/523 (2006.01) H03K 17/0416 (2006.01) H03K 17/0814 (2006.01)

Patent

CA 2017639

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, an inductor 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 addi- tional winding supplied with a load current, thus preventing surge currents in the switch elements.

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