| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a complex resonance converter having a synchronous rectification circuit in which a high power conversion efficiency can be attained while reducing the circuit scale and cost through simplification of circuitry. <P>SOLUTION: A winding voltage detection system synchronous rectification circuit is provided on the secondary of a complex resonance converter. Coupling factor is lowered down to 0.79 or thereabout by setting the gap length of an insulating converter transformer PIT at about 1.5 mm, and the number of turns of a primary winding N1 and a secondary winding N2 are set such that the induction voltage level per one turn (T) of the secondary winding becomes 2V/T. Since flux density in the core of the insulating converter transformer PIT becomes constant, continuous mode of a secondary rectification current can be ensured even under heavy load conditions. Furthermore, a current doubler rectification circuit is combined by adding inductors L11 and L12 to the synchronous rectification circuit. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
