POWER TRANSMISSION SYSTEM AND POWER SUPPLY DEVICE FOR VEHICLES

摘要

A power transmission system has an AC power source (210) and a high-frequency power driver (220) that make up a high-frequency power source, and a primary self- resonant coil (240) and a secondary self-resonant coil (110). The secondary self- resonant coil (110) is magnetically coupled, by magnetic field resonance, to the primary self-resonant coil (240), and receives as a result high-frequency power from the primary self-resonant coil (240). The coils of the primary self-resonant coil (240) and the secondary self-resonant coil (110) resonate in an even mode when high- frequency power is transmitted from the primary self-resonant coil (240) to the secondary self-resonant coil (110). Specifically, the primary self-resonant coil (240) and the secondary self-resonant coil (110) resonate in a state where currents in mutually opposite directions flow in the two coils.