Low-loss clamp circuit

Details Low-loss clamp circuit Low-loss clamp circuit

H - Electricity

02

M

H02M 3/135 (2006.01) H02M 3/337 (2006.01) H03K 17/0814 (2006.01) H03K 17/00 (2006.01)

Patent

CA 2146921

A low loss clamp circuit is provided for a dc to dc converter. The converter has a transformer with a secondary winding and a secondary circuit and a center tap primary winding. A dc voltage input is supplied to the primary winding center tap and to a circuit ground. A rectifier such as a bridge rectifier connects to two ends of the secondary winding and to the circuit ground to supply a dc output voltage. A pair of semiconductor switches such as FET switches are provided. Each end of the primary winding is connected through a respective switch to the common ground. The various circuits of Figs. 2, 3, 12 and 13 have energy storage means including the input capacitor 31 and input choke 32 in circuit with the primary winding. It will also be noted that the output capacitor 29 is a part of the energy storage means. This energy storage means is connected to return energy to the secondary circuit, not the primary circuit. The foregoing Abstract is merely a resume of general applications, it is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

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