Analysis, Design, Modeling, and Implementation of an Active Clamp HF Link Converter
Analysis, Design, Modeling, and Implementation of an Active Clamp HF Link Converter
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有源钳位高频链路转换器的分析、设计、建模和实现
DOI：
10.1109/tcsi.2010.2097714
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
V. Ramanarayanan
中科院分区：
文献类型：
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作者：
Dipankar De;V. Ramanarayanan
本文对有源箝位高频链路三相变换器进行了面向系统的分析、设计、建模和实现。这种拓扑结构的主要优点是减小了隔离变压器的尺寸、重量和成本。然而，由于高频变压器中漏感的存在，违反了基本的功率转换规则，导致整个环变换器器件的过电压应力。它利用了这种拓扑结构中必要的缓冲电路。传统的RCD缓冲器本质上是耗散的，因此效率低下。采用再生缓冲器或有源箝位电路，大大提高了系统的效率。它由一个带有反并联二极管的有源开关装置和一个电容器组成，用于吸收隔离变压器泄漏电感中存储的能量，并在不影响电路性能的情况下将其重新生成。有源器件的开启瞬间和持续时间的选择使得它需要简单的换相要求。给出了电路动力学的时域表达式、两个相互冲突约束（器件间过电压应力和谐振电流持续时间）下缓冲电容的设计准则、基于广义电路模型的仿真结果和基于实验室样机的实验结果。
This paper deals with the system oriented analysis, design, modeling, and implementation of active clamp HF link three phase converter. The main advantage of the topology is reduced size, weight, and cost of the isolation transformer. However, violation of basic power conversion rules due to presence of the leakage inductance in the HF transformer causes over voltage stresses across the cycloconverter devices. It makes use of the snubber circuit necessary in such topologies. The conventional RCD snubbers are dissipative in nature and hence inefficient. The efficiency of the system is greatly improved by using regenerative snubber or active clamp circuit. It consists of an active switching device with an anti-parallel diode and one capacitor to absorb the energy stored in the leakage inductance of the isolation transformer and to regenerate the same without affecting circuit performance. The turn on instant and duration of the active device are selected such that it requires simple commutation requirements. The time domain expressions for circuit dynamics, design criteria of the snubber capacitor with two conflicting constrains (over voltage stress across the devices and the resonating current duration), the simulation results based on generalized circuit model and the experimental results based on laboratory prototype are presented.