| 摘要 |
An improved power converter utilizing a full wave or half wave bridge circuit is provided by capacitively decoupling the primary winding of the transformer, which is coupled to the output of the bridge circuit. The switches in the bridge are also driven in a complementary fashion so that all the switches are turned off during a constant dead time during which the switches are driven to zero voltage. Switches in the bridge circuit are then turned on only at zero voltage. Zero voltage switching is further provided over a wider range of input and output conditions by providing a third switch in series circuit with a secondary winding of the transformer, typically either in the form of a saturable reactor or a synchronized switch. Further circuit advantages are obtained by deleting any center tap on the secondary winding and providing output chokes in series circuit with each terminal of the secondary winding and coupled at their opposing ends to one terminal of the output of the secondary circuit.
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