BIDIRECTIONAL CONTACTLESS POWER SUPPLY SYSTEM

Provided is a bidirectional contactless power supply system having high-efficiency in terms of bidirectional power supply. The bidirectional contactless power supply system is equipped with: first, second, and third power converters (20, 10, 40) provided with functionality for converting direct current into alternating current, and functionality for converting alternating current into direct current; and a contactless power supply device (30) in which a primary-side circuit is connected to the power converter (20), and a secondary-side circuit is connected to the power converter (40). When power is supplied from the primary-side circuit to the secondary-side circuit, the power converter (10) carries out an operation for conversion into direct current, the power converter (20) carries out an operation for conversion into alternating current, and the power converter (40) carries out an operation for conversion into direct current. When power is supplied from the secondary-side circuit to the primary-side circuit, the power converter (40) carries out an operation for conversion into alternating current, the power converter (20) carries out an operation for conversion into direct current, and the power converter (10) carries out an operation for conversion into alternating current. The contactless power supply device (30) has a primary-side series capacitor (33), a secondary-side parallel capacitor (34), and a secondary-side series inductor (35), and carries out G2V and V2G operations with high efficiency.