WIRELESS POWER TRANSMISSION SYSTEM

A wireless electric energy transmission system (300) is provided, including a transmitter (TX) and a receiver (RX). The transmitter (TX) includes a DC/AC inverter circuit (313), a first inductor (LI), and a first capacitor (CI) that are connected in series. The receiver (RX) includes an AC/DC rectifier circuit (323), a second inductor (L2), and a second capacitor (C2) that are connected in series. Electric energy of the transmitter (TX) is transmitted to the receiver through electromagnetic induction between the first inductor (LI) and the second inductor (L2). The transmitter (TX) is configured to: detect a value of a resonant frequency of the transmitter (TX); detect a value of a coupling coefficient between the transmitter (TX) and the receiver (RX); obtain a value of a constant-voltage operating frequency of the transmitter (TX) through calculation based on the resonant frequency and the coupling coefficient; and control an operating frequency of the DC/AC inverter circuit (313) based on the constant-voltage operating frequency obtained through calculation.