| 摘要 |
PROBLEM TO BE SOLVED: To obtain a complex resonance converter outputting a plurality of secondary DC output voltages in which a high power conversion efficiency can be attained while reducing the circuit scale and cost through simplification of circuitry. SOLUTION: At least one of a plurality of secondary rectification circuits of a complex resonance converter is a current doubler/synchronous rectification circuit combining a current doubler rectification circuit by adding inductors L11 and L12 to a winding voltage detection system synchronous rectification circuit. Continuous mode of a secondary rectification current is ensured even under heavy load conditions by setting the gap length of an insulating converter transformer PIT at about 1.5 mm thereby lowering the coupling factor down to 0.8 or thereabout, and setting the number of turns of a primary winding N1 and secondary windings N2, N3 and N4 such that the induction voltage level per one turn (T) of the secondary winding becomes 2V/T. DC output voltage from each synchronous rectification circuit is made constant by controlling an inductance inserted into a rectification current passage variably through a crossed control transformer. COPYRIGHT: (C)2005,JPO&NCIPI
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