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首页> 外文期刊>Power Electronics, IET >Performance and design analysis of an improved non-isolated multiple input buck DC–DC converter
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Performance and design analysis of an improved non-isolated multiple input buck DC–DC converter

机译：改进的非隔离多输入降压DC-DC转换器的性能和设计分析

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摘要

This study proposes an improved non-isolated single-inductor multiple-input buck DC-DC converter, with reduced number of components. Less component count can reduce the size, mass and cost of converter. Simultaneous or independent power transfer capability has been provided for input sources. The bidirectional power flow capability has also been provided through usage of a battery without any additional switches. This makes the topology very suitable for hybrid energy systems or hybrid electric vehicle/electric vehicle applications. Different operational modes of proposed topology have been presented. Then, a generalised relationship has been proposed for calculation of critical inductance (as an important design parameter) of proposed -input buck topology. To make a better judgement, the proposed topology has been compared with recently presented novel topologies. Also, a simple proportional-integral based controller has been applied to regulate output voltage and assign the portion of power that each input source should provide. To confirm the validity of proposed topology and theoretical concepts, the three-input version has been modelled and simulated in PSCAD/EMTDC software and implemented experimentally. Simulation and experimental results validate proper performance of proposed topology.
机译：这项研究提出了一种改进的非隔离单电感多输入降压DC-DC转换器，其组件数量减少了。更少的组件数量可以减少转换器的尺寸，质量和成本。已为输入源提供了同时或独立的功率传输功能。还可以通过使用电池来提供双向功率流能力，而无需任何其他开关。这使得该拓扑非常适合于混合能源系统或混合电动车辆/电动车辆应用。已经提出了提议的拓扑的不同操作模式。然后，提出了一种通用关系，用于计算建议的输入降压拓扑的临界电感（作为重要的设计参数）。为了做出更好的判断，已将提议的拓扑与最近提出的新颖拓扑进行了比较。同样，已经应用了一个简单的基于比例积分的控制器来调节输出电压并分配每个输入源应提供的功率部分。为了确认所提出的拓扑和理论概念的有效性，已在PSCAD / EMTDC软件中对三输入版本进行了建模和仿真，并通过实验进行了实现。仿真和实验结果验证了所提出拓扑的正确性能。

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