COIL UNIT, NONCONTACT POWER TRANSMITTER, NONCONTACT POWER SUPPLY SYSTEM, AND MOTOR-DRIVEN VEHICLE

摘要

PPROBLEM TO BE SOLVED: To improve transmission efficiency in transmission of electric power by a resonance method. PSOLUTION: A coil unit 400 at least for transmitting or receiving electric power by the resonance method is characterized in that the length of a coil material surface of the coil material of a self-resonance coil 420 in a cross section is longer than the length of a coil material surface of the coil material of an electromagnetic induction coil 410 in a cross section. PCOPYRIGHT: (C)2011,JPO&INPIT