Noncontact power supply system and electromagnetic induction coil for noncontact power supply apparatus

摘要

A noncontact power supply system includes a power supply device (A) having a primary coil (1) acting as an electromagnetic induction coil for a noncontact power supply system, and a power receiving device (B) having a secondary coil (3, 30). The primary coil (1) has a primary core (11) and a winding wire (12). The secondary coil (3, 30) has a secondary core (31) and a winding wire (12). The primary core (11) includes a base segment (11a), a pair of extension segments (11b), and a pair of opposite segments (11c). The pair of opposite segments (11c) are arranged to allow a space (S) to be defined therebetween. The winding wire (12) is wound at least around the pair of opposite segments (11c). The secondary coil (3, 30) is arranged between the pair of opposite segments (11c) during power supply. The power receiving device (B) includes a magnetic sheet (5) that is in tight contact with an end surface (11d) of the secondary core (31) and has an area larger than that of the end surface (11d).