Importance

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Abstract

A noncontact power transmitting apparatus which makes it possible to rapidly charge a secondary cell of a part to be charged with large electric power and realize a lightweight and compact part to be charged. A power-transmitting coil of a charging part is divided into two sets, and the power-transmitting coils of the sets are respectively wound around cores, and are formed as a first power-transmitting coil portion 26 and a second power-transmitting coil portion 27 which are separate and independent as the two sets. Meanwhile, a power-receiving coil of a part to be charged is wound around a core, and is formed as a single power-receiving coil portion 28. In a chargeable state in which the part to be charged is placed on the charging part, the power-receiving coil portion 28 is inserted in a space between the first power-transmitting coil portion 26 and the second power-transmitting coil portion 27, and the first power-transmitting coil portion 26, the power-receiving coil portion 28, and the second power-transmitting coil portion 27 are arranged in such a manner as to be aligned with each other. Windings are wound such that the polarities of the windings are adjusted so that the directions of magnetic fluxes .phi.1 and .phi.2, which penetrate from the first power-transmitting coil portion 26 and the second power-transmitting coil portion 27 through the power-receiving coil portion 28, are constantly set in the same direction.

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First Claim