POWER SUPPLY DEVICE, CONTACTLESS POWER TRANSMISSION APPARATUS, VEHICLE, AND CONTACTLESS POWER TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a power supply device, a contactless power transmission apparatus, a vehicle and a contactless power transmission system that have an amplification circuit configured to implement zero voltage switching even if a parasitic capacitance of a switching element is large.

SOLUTION: A power supply device 20 includes a choke coil 210, a switching element 220, a resonance circuit 250 and a compensation circuit 260. A parasitic capacitance 270 of the switching element 220 is larger than a predetermined capacitance for implementing class E zero voltage switching. The compensation circuit 260 is connected in parallel with the switching element 220. The compensation circuit 260 includes a coil 262 and a capacitor 264 that are connected in series, and has an inductive impedance.

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