A modularized charge equalizer using the magnetizing energy of the multi-winding transformer
A modularized charge equalizer using the magnetizing energy of the multi-winding transformer
复制标题
利用多绕组变压器磁化能的模块化电荷均衡器
DOI：
10.1109/vppc.2012.6422631
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
D. Hyun
中科院分区：
文献类型：
--
作者：
Chang;Rae;D. Hyun
模块化均衡器在长串联连接的锂离子电池串中的模块之间使用附加组件。在这些方法中，整个系统是沉重的、庞大的和高价格的。此外，与附加部件相关的损耗降低了系统效率。为了避免这些问题，需要模块化的均衡器，其在模块之间没有附加组件。本文提出了一种利用多绕组Transformer的磁化能量进行模块均衡的控制方案。在该方案中，高占空比被施加到电压高于参考电压的模块，而低占空比被施加到电压低于参考电压的模块。由于不同的占空比，在关断切换间隔期间，更多的电荷从高电压模块转移到低电压模块。使用所提出的控制方案，均衡器系统不遭受的大小，成本和损失的模块化。实验结果验证了所提出的模块化均衡器的有效性。
The modularized equalizers use additional components among the modules in the long series-connected lithium-ion battery string. In these approaches, the overall systems are heavy, bulky, and high-priced. Furthermore, the losses related to additional components decrease the system efficiency. To avoid these problems, a modularized equalizer, which has no additional components among the modules, is required. This paper proposes a novel control scheme using the magnetizing energy of the multi-winding transformer for the module equalization. In this scheme, the high duty cycle is applied to the module where the voltage is higher than the reference voltage and the low duty cycle is applied to the module where the voltage is lower than the reference voltage. Due to the different duty cycle, more electric charges are transferred from high voltage module to the low voltage module during the turn-off switching interval. Using the proposed control scheme, the equalizer system does not suffer from the size, cost, and loss related to the modularization. The experimental results are provided to verify the effectiveness of the proposed modularized equalizer.