POWER-RECEIVING DEVICE AND NON-CONTACT POWER TRANSMISSION SYSTEM USING SAME

摘要

[Problem] To provide a power-receiving device that can improve power utilization efficiency. [Solution] A power-receiving device (20) in a non-contact power transmission system (100) comprises a power-receiving antenna circuit (32) for receiving power transmitted from a power-transmitting device (10), a rectification circuit (40) for rectifying power received by the power-receiving antenna circuit (32), a frequency-changing circuit (70) for changing a received power frequency of the power-receiving antenna circuit (32), and a drive circuit (80) for driving the frequency-changing circuit (70). The power-receiving antenna circuit (32) has two terminals (La, Lb). The frequency-changing circuit (70) has a circuit configuration symmetrical about the circuit center (center tap (CT)) thereof, and is connected between the terminals (La, Lb). The rectification circuit (40) is a single-phase bridge rectification circuit. A ground terminal of the rectification circuit (40) is connected to the circuit center (center tap (CT)) of the frequency-changing circuit (70).