Design of a Dual-Loop Controller with Two Voltage-Dependent Current Compensators for an LLC-Based Charger.

IEEE ... Workshop on Control and Modeling for Power Electronics : [proceedings]. IEEE Workshop on Control and Modeling for Power Electronics Pub Date : 2020-01-01 DOI:10.1109/compel52922.2021.9645959

Ujjwal Pratik, Muhammad Abdelraziq, Urvi Ahluwalia, Zhansen Akhmetov, Gabriel Chenevert, Zeljko Pantic

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Abstract

A two-stage charger (PFC+LLC) is developed for Power Mobility Device (PMD) charging applications (i.e., power wheelchairs). The LLC topology is selected due to its ability to maintain ZVS operation over a wide range of load variations. This paper discusses the challenges of designing a dual-loop controller for an LLC-based charger with a wide operation region. It proposes modifying the inner current loop to maintain stable operation over a wide input and output range-the proposed internal loop control switches intelligently between two current controllers based on the output voltage level. A 300-W prototype is designed and tested with a resistive load. Moreover, simulation and experimental results are compared to validate the robustness and stability of the proposed controller.

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具有两个电压相关电流补偿器的plc充电器双环控制器设计。

一种两级充电器（PFC+LLC）是为电力移动设备（PMD）充电应用（即电动轮椅）开发的。选择LLC拓扑是因为它能够在大范围的负载变化中保持ZVS运行。本文讨论了为宽工作区域的plc充电器设计双环控制器所面临的挑战。提出修改内电流环，使其在宽输入输出范围内保持稳定运行，内回路控制根据输出电压水平在两个电流控制器之间智能切换。设计了一个300w的样机，并在电阻负载下进行了测试。仿真与实验结果对比验证了所提控制器的鲁棒性和稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE ... Workshop on Control and Modeling for Power Electronics : [proceedings]. IEEE Workshop on Control and Modeling for Power Electronics

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