Sliding-mode and PI control scheme for traveling wave tube high voltage converter

被引：0

作者：

Zheng K. ^{[1
]}

Zhou D. ^{[1
]}

Li J. ^{[1
]}

Li K. ^{[1
]}

Cao X. ^{[2
]}

机构：

[1] Communication Engineering College, Information Engineering University, Zhengzhou

[2] Unit 71426, Jiaozuo

来源：

Gaodianya Jishu/High Voltage Engineering | 2016年 / 42卷 / 06期

关键词：

LLC converter; Mutation load; PI control; Sliding-mode control; Soft switching; Switched function;

D O I：

10.13336/j.1003-6520.hve.20160616017

中图分类号：

学科分类号：

摘要：

In order to improve the dynamic response and steady-state characteristics of traveling wave tube high voltage converter in the load mutation condition, a sliding-mode and proportional plus integral(PI) control scheme is proposed, which will be adopted to meet the technical requirements of the high voltage power supply for traveling wave tube. Firstly, the full bridge LLC resonant converter with multiplier rectifier is designed, and the working principle of the LLC converter is analyzed based on self-sustained phase shift modulation. Secondly, the averaged large-signal model of LLC resonant converter is built by using averaged large-signal modeling method. Thirdly, a sliding-mode and PI control scheme is proposed based on the large-signal model,and the nonlinear switched function is introduced to implement the smooth transition between the sliding-mode control and PI control. Finally, the simulation results prove that the proposed control scheme possesses good dynamic characteristics and strong robustness from sliding mode control and good stability from PI control in the load mutation condition, and also possesses some advantages, such as small overshoot, fast response, high steady-state accuracy, and small output ripple. The simulation results show that the zero voltage switching of the proposed LLC converter can be implemented in the whole working condition. © 2016, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：1797 / 1804

页数：7

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