Average-Current-Based Conduction Losses Model of Switched Capacitor Converters
Average-Current-Based Conduction Losses Model of Switched Capacitor Converters
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DOI：
10.1109/tpel.2012.2226060
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发表时间：
2013-07
影响因子：
6.7
通讯作者：
M. Evzelman;S. Ben-Yaakov
中科院分区：
文献类型：
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作者：
M. Evzelman;S. Ben-Yaakov
提出了一种分析开环开关电容变换器（SCC）损耗的通用建模方法，并通过仿真和实验进行了验证。所提出的分析方法是统一的，涵盖了包括有源开关和/或二极管在内的硬和软scc拓扑。所提出的模型的一个重要特征是，它将损耗表示为在每个开关阶段通过每个飞行电容器的平均电流的函数。由于这些电流与输出电流成线性比例，如果可以假设建模的SCC的每个子电路都可以用一阶系统描述或近似，则该模型也适用于具有多个电容器的SCC。该模型可用于评估SCC的工作条件（如开关频率和占空比）对预期损耗的影响。因此，该模型可以帮助优化SCC系统及其控制，以实现高效率和期望的规则。
A generic modeling methodology that analyzes the losses in switched capacitor converters (SCC) operating in open loop was developed and verified by simulation and experiments. The proposed analytical approach is unified, covering both hard- and soft-SCC topologies that include active switches and/or diodes. An important feature of the proposed model is that it expresses the losses as a function of the average currents passing through each flying capacitor during each switching phase. Since these currents are linearly proportional to the output current, the model is also applicable to SCC with multiple capacitors if it can be assumed that each of the subcircuits of the modeled SCC can be described or approximated by a first-order system. The proposed model can be used to assess the effect of the operational conditions of the SCC, such as switching frequency and duty cycle, on the expected losses. As such, the model can help in the optimization of SCC systems and their control to achieve high efficiency and the desired regulations.