| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce a loss of a phase-shift PWM control DC-DC converter to increase efficiency.SOLUTION: A DC-DC converter comprising an inverter INV, a transformer Tr to which an AC output of the inverter is input and an AC-DC conversion part 4 for converting an output of the transformer to a DC output comprises: first and second secondary-side switch elements Q5 and Q6, first and second feedback diodes D5 and D6, first and second secondary-side inductors L21 and L22 and first and second cyclic current conduction diodes D7 and D8, which are provided on the secondary side of the transformer Tr to compose a current doubler rectifier circuit on the secondary side of the transformer thereby to reduce a conduction loss generated at the transformer. And a switching loss is reduced by causing on-off of the switch elements of the inverter and on-off of the first and second secondary-side switch elements to be performed by software switching.</p> |
