A High Voltage Gain DC-DC Converter Integrating Coupled-Inductor and Diode-Capacitor Techniques
A High Voltage Gain DC-DC Converter Integrating Coupled-Inductor and Diode-Capacitor Techniques
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DOI：
10.1109/tpel.2013.2257870
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发表时间：
2014-02-01
影响因子：
6.7
通讯作者：
Gong, Chunying
中科院分区：
文献类型：
--
作者：
Hu, Xuefeng;Gong, Chunying
高压增益转换器广泛应用于光伏系统、燃料电池系统、电动汽车、高强度放电灯等工业领域。本文提出了一种新型的单开关高升压非隔离DC-DC转换器，它集成了耦合电感、扩展倍压单元和二极管-电容技术。该变流器在适当的占空比下实现了极大的电压转换比，降低了功率器件上的电压应力。此外，耦合电感的漏感中存储的能量被有效地回收到输出，倍压单元还用作再生钳位电路，缓解了漏感和输出二极管的结电容之间的电势谐振问题。这些特性使得为工业应用设计高静态增益和高效率的紧凑型电路成为可能。此外，采用耦合电感的变流器还减小了意外的高脉冲输入电流。详细讨论了该变流器的工作原理和稳态分析。最后，在实验室中实现了一个原型电路，以验证所提出的转换器的性能。
The high-voltage gain converter is widely employed in many industry applications, such as photovoltaic systems, fuel cell systems, electric vehicles, and high-intensity discharge lamps. This paper presents a novel single-switch high step-up nonisolated dc-dc converter integrating coupled inductor with extended voltage doubler cell and diode-capacitor techniques. The proposed converter achieves extremely large voltage conversion ratio with appropriate duty cycle and reduction of voltage stress on the power devices. Moreover, the energy stored in leakage inductance of coupled inductor is efficiently recycled to the output, and the voltage doubler cell also operates as a regenerative clamping circuit, alleviating the problem of potential resonance between the leakage inductance and the junction capacitor of output diode. These characteristics make it possible to design a compact circuit with high static gain and high efficiency for industry applications. In addition, the unexpected high-pulsed input current in the converter with coupled inductor is decreased. The operating principles and the steady-state analyses of the proposed converter are discussed in detail. Finally, a prototype circuit is implemented in the laboratory to verify the performance of the proposed converter.