논문 해외 국제전문학술지(SCI급) A Study on the Optimal Magnetic Beam Forming of Coil Arrays for Long Distance Wireless Power Transmission
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2023-06
- 저자명 정영배공동(교신),오명준,Patrick Danuor
- 학술지명 SENSORS
- 발행처명 MDPI
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
Multiple-input multiple-output (MIMO) wireless power transfer (WPT) technology which employs multiple transmitter (TX) coils to simultaneously couple power to the receiver (RX) coil has proved to be an effective technique to enhance power transfer efficiency (PTE). Conventional MIMO-WPT systems rely on the phase-calculation method based on the phased-array beam steering concept to constructively combine the magnetic fields induced by the multiple TX coils at the RX coil. However, increasing the number and distance of the TX coils in an attempt to enhance the PTE tends to deteriorate the received signal at the RX coil. In this paper, a phase-calculation method is presented that enhances the PTE of the MIMO-WPT system. The proposed phase-calculation method considers the coupling between the coils and applies the phase and amplitude to calculate the coil control data. From the experimental results, the transfer efficiency is enhanced as a result of the transmission coefficient improvement from a minimum of 2 dB to a maximum of 10 dB for the proposed method as compared to the conventional one. By implementing the proposed phase-control MIMO-WPT, high-efficiency wireless charging is realizable wherever electronic devices are located in a specific space.