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A High Gain High Efficiency and Compact Isolated Sepic DC-DC Converter

机译：高增益高效率和紧凑型SEPIC DC-DC转换器

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摘要

A Sepic converter for high power and the high gain application has been proposed in this paper. Generally, due to magnetic limitation, a single Flyback transformer cannot handle high power. Hence, for relatively higher power applications, people prefer the use of interleaved Flyback converter structures. But the interleaved Flyback converter requires the use of two switches. The interesting feature of the proposed converter is that power handling of both the Flyback transformers can be done by a single switch of same voltage rating as that of the conventional interleaved Flyback converter. Hence the solution requires less number of components resulting in a compact and low-cost structure. The voltage rating of the power electronic devices used is much less than the total output voltage in the ideal condition. This results in low conduction loss and high efficiency of voltage step-up conversion. As the output of the two Flyback sub-converters is connected in series to boost the voltage level, the requirement of the turn's ratio of each transformer is less if we compare the turn's ratio requirement of the interleaved Flyback converter used presently. This result in tighter coupling between the windings of the transformer, which reduces the value of the leakage inductance, which causes high losses and unwanted voltage spikes along with radiated noises affecting various part of the circuit and the surrounding. Detailed Explanation of the working of the circuit is given through the modes of operation and a detailed steady-state analysis has been done. The analytical results are verified through the simulations were done using Matlab-Simulink software.
机译：本文提出了一种高功率和高增益应用的SEPIC转换器。通常，由于磁限制，单个反激变压器无法处理高功率。因此，对于相对较高的功率应用，人们更喜欢使用交织的反激式转换器结构。但交错的反激式转换器需要使用两个交换机。所提出的转换器的有趣特征是反激变压器的功率处理可以通过与传统的交织反激式转换器相同的电压额定值的单个开关来完成。因此，解决方案需要较少数量的组件，导致紧凑且低成本的结构。所用功率电子设备的电压额定值远小于理想条件下的总输出电压。这导致导通损耗和电压升压转换的高效率。由于两个反式转换器的输出串联连接以提高电压电平，如果我们将交错的反激式转换器的转向的比率要求进行比较目前使用的交错反激转换器的转弯的比率要求，则每个变压器的转弯比率的要求较少。这导致变压器绕组之间的耦合，这降低了漏电电感的值，这导致高损耗和不需要的电压尖峰以及影响电路的各部分的辐射噪声和周围的辐射。通过操作模式和详细的稳态分析给出了对电路的工作的详细说明。通过使用Matlab-Simulink软件进行仿真验证了分析结果。

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