Non-contact type power receiving apparatus, electronic equipment and charging system using the power receiving apparatus

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;
• and
• an electronic device operated by being supplied with the direct voltage from the secondary battery,
• wherein said non-contact type power receiving apparatus further comprises a composite magnetic body which is provided to at least one portion between the secondary battery and the spiral coil, and a 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 tu, 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, said composite magnetic body satisfy the following relations:
• μd·td≦60 [mm];
• and μu·tu≧100 [mm].