Điều Khiển Ổn Định Điện Áp Đầu Ra Tải Và Nâng Cao Hiệu Suất Trong Hệ Thống Truyền Điện Không Dây

Abstract

In recent years, Wireless Power Transfer (WPT) technology has received remarkable attention because of its wide range of applications. To
control the output voltage and maximize the efficiency of the system under variable conditions, primary-side phase shift H-bridge inverter
and secondary-side semiactive rectifier are simultaneously utilized in this paper. The control method is performed on both primary and
secondary sides. Besides, the study suggests a formula to estimate the output power and calculate the tranfer power value needed to supply.
This power controller uses phase-shift modulation method to help the system achieve maximum efficiency. A 2.5 kW WPT system was built
in the laboratory to verify the proposed method. A stable 400 V on the load is achieved with 2.3% control error, and the transfer efficiency is
improved up to 90.9%