Affiliation of Author(s):电子信息工程学院

Journal:IEEE Trans Power Electron

Abstract:In this paper, a technique of variable-turns-ratio high-frequency link inverter is proposed to provide a simple method to achieve multi-level outputs for the isolated single-stage high-frequency link inverters. By dynamically adjusting the turns ratio of transformer, five-level (±2, ±1, and 0) outputs can be achieved to improve the current quality. The single transformer, compared with the existing two-level high-frequency link inverter, is employed in the structure and only a few auxiliary devices are added, where the added circuit operates at low frequency and the power density is refined. Based on this technique, the single-stage active clamped forward grid-connected inverter with variable turns ratio is taken as an example to better illustrate the analysis process and a 1000-W prototype is designed and established to evaluate the output performance. The conducted simulation results and prototype tests verify the feasibility of the proposed single-stage variable-turns-ratio high-frequency link grid-connected inverter. © 1986-2012 IEEE.

ISSN No.:0885-8993

Translation or Not:no

Date of Publication:2019-08-01

Co-author:Ji, Baojian,Wu, Yu,wyh,zhouyufei

Correspondence Author:Hong Feng