| 摘要 |
PROBLEM TO BE SOLVED: To reduce the influence of input voltage change and load change in high frequency operation in a resonance type DC/DC converter.SOLUTION: In a resonance type DC/DC converter 10, an input circuit 14 is configured such that a DC power source 18, a resonance auxiliary coil 32, a primary-side coil 22, and a switching element 34 are connected in series, and a rectifier 36 and a resonance capacitor 38 are connected in parallel. Here, the resonance type DC/DC converter 10 further comprises: an inductance value alteration circuit 40 that alters the inductance value of the resonance auxiliary coil 32; and a control device 50 that controls the inductance value alteration circuit 40 and that alters the inductance value of the resonance auxiliary coil 32 according to the voltage value of a DC power source 18 so that voltages at both ends of the primary-side coil 22 are constant. |
