Patent ID: 8922160

Claim:
A non-contact type power receiving apparatus comprising: a power receiving coil having a spiral coil; a rectifier for rectifying alternative voltage generated at the power receiving coil; a secondary battery for being charged with direct voltage which is rectified by the rectifier; an electronic device operated by being supplied with the direct voltage from the secondary battery; and a composite magnetic body which is provided as at least one of a first portion between the secondary battery and the spiral coil, and a second portion between the electronic device and the spiral coil, wherein said composite magnetic body comprises at least two layers including first and other layers of magnetic sheets through an insulating layer in which when a relative magnetic permeability of the first magnetic sheet provided to a side of the spiral coil is denoted as μd, a thickness of the first magnetic sheet is denoted as td, an average relative magnetic permeability of the other layers of magnetic sheets other than the first magnetic sheet is denoted as μu, and a total thickness of the other layers of magnetic sheets is denoted as tu, where said composite magnetic body satisfies the following relations: μ d·td≦ 60 [mm]; and μ u·tu≧ 100 [mm], wherein said magnetic sheets are formed of at least one material selected from a group consisting of Co-type amorphous alloy, Fe-type amorphous alloy, Fe-type micro-crystalline alloy, permalloy, and silicon steel, and the magnetic sheets have an average thickness of 100 μm or less.