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Boost and full-bridge integrated converter for wide input-voltage range application

机译：用于宽输入电压范围应用的升压和全桥集成转换器

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摘要

The output voltage of fuel and solar cells varies extensively and is often low. Thus, high step-up DC-DC converters in DC microgrid should be suitable for an extensive input-voltage range application. However, the voltage stress of rectifier diodes is high in an extensive voltage range in voltage-source converters. In addition, the input current of the converter should be continuous to obtain a high lifetime of fuel cell and to realize maximum power point tracking (MPPT) for the PV array. Output current of the converter should be continuous to use a film capacitor, which can improve the lifetime and reliability of the converter. Thus, a boost and full-bridge integrated converter is proposed. Switches in the boost converter are shared with the full-bridge converter to reduce the number of switches. Since transformer secondary to primary turns ratio is reduced compared to voltage-source converters, voltage stress of rectifier diodes is low. As there are input and output inductors in the proposed converter, input and output currents are continuous. Operating principle is elaborated. Design guidelines and example are illustrated. The loss calculation of the proposed converter is given. Finally, simulation and experimental results confirm the theoretical analysis. The proposed converter can be used in the wide input-voltage range application.
机译：燃料和太阳能电池的输出电压广泛变化，并且通常很低。因此，DC MicroGrid中的高升压DC-DC转换器应适用于广泛的输入电压范围应用。然而，整流二极管的电压应力在电压源转换器中的广泛电压范围内高。另外，转换器的输入电流应该是连续的，以获得燃料电池的高寿命，并实现PV阵列的最大功率点跟踪（MPPT）。转换器的输出电流应连续使用胶片电容器，可以提高转换器的寿命和可靠性。因此，提出了升压和全桥集成转换器。升压转换器中的开关与全桥转换器共享，以减少交换机的数量。由于与电压源转换器相比，次级转动比率的变压器减小，因此整流二极管的电压应力低。由于所提出的转换器中存在输入和输出电感器，输入和输出电流是连续的。经营原则被阐述。说明了设计指南和示例。给出了所提出的转换器的损耗计算。最后，仿真和实验结果证实了理论分析。所提出的转换器可用于宽输入电压范围应用。

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