| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a prior art that a resonance circuit is increased in size.SOLUTION: A power conversion device includes a transformer containing a first winding and a second winding that is magnetically coupled with the first winding, a bridge circuit including a switching element, a resonant inductor and a resonant capacitor. The resonant inductor and the resonant capacitor constitute a resonance circuit together with an inductance which the first winding has, and satisfy n1≥n2. The resonant inductor is inserted in series with the first winding in a passage passing from a first connection point through the first winding and reaching a second connection point, and the resonant capacitor is inserted in series with the second winding in a passage passing from the second winding and reaching an output end. When the capacitance of the resonance capacitor is represented by Cr, and the capacitance of a capacitance component having in-series relationship with the first winding in the passage passing from the first connection point through the first winding and reaching the second connection point is represented by C1, Cr>C1 is satisfied.SELECTED DRAWING: Figure 1 |
