NON-CONTACT POWER SUPPLY DEVICE

摘要

This non-contact power supply device is provided with a power transmission device (110), a magnetism collecting device, and a power reception device. The power transmission device (110) is provided with switching elements (112A, 112B) for generating an alternating magnetic flux from a power supply circuit (121) to a power transmission resonant circuit. The power reception device is provided with: a magnetism collecting device that is provided with a magnetism collecting circuit not to be connected to a load; a power reception coil capable of being magnetically coupled to the magnetism collecting device; and a rectifying circuit that supplies the load with output power of the power reception coil. The power transmission resonant frequency of the power transmission resonant circuit is smaller than the drive frequency of the switching elements (112A, 112B), and the power reception resonant frequency of the magnetism collecting circuit is larger than the drive frequency of the switching elements (112A, 112B). Consequently, the non-contact power supply device having a high power transmission efficiency and excellent productivity is provided.