2D & 3D 무지향성 무선전력 기술 동향

초록

Wireless power transfer (WPT) technologies are the most viable solution to remove the cumbersome power cables for fine view, prevention of electrical accident, and high convenience for electrical charging. The basic principle of WPT technologies is based on the magnetic coupling between transmitter (Tx) and receiver (Rx) coils, operating at high operating frequency. The mobile WPT products, commercialized in markets now, support only 1:1 (Tx to Rx) wireless charging service. In this case, those WPT products are available only at ne-spot wireless charging point, I.e., 1-DoF, To increase wireless charging DoF, 2-dimension (2D) and 3-dimension (3D) WPT are currently being developed SO that the user can freely utilize the highest DoF for wireless charging service. In this paper, the concept of wireless charging DoF is defined, and 2D&3D WPT technologies are widely introduced. The 2D&3D WPT technologies can provide the highest wireless charging freedom for charging the multiple electric devices.