DEVICE TO BE CHARGED IN NON-CONTACT MANNER, NON-CONTACT CHARGING SYSTEM USING THE SAME, AND ELECTRIC APPARATUS

摘要

PROBLEM TO BE SOLVED: To efficiently perform charging in a non-contact charging system.

SOLUTION: A transmitting coil 25 of a charger 2 and a power receiving coil 12 of a charged device 1 function as a separable transformer. In the charged device 1, current induced in the power receiving coil 12 by electromagnetic induction between coils 12 and 25 is rectified by a rectifying circuit 13. A secondary battery 11 is charged. A current detecting part 15 and a display part 16 are arranged in the charged device 1. The current detecting part 15 detects the magnitude of a current induced by electromagnetic induction, and a detection result is displayed on the display part 16. Thus, a user obtains charging efficiency (coupling efficiency of non-contact coil), to mount the charged device 1 on the optimum position on the charger 2. Thus, non-contact charging can efficiently be performed in a short time.

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