Analysis, Design, and Experimentation of an Isolated ZVT Boost Converter With Coupled Inductors
Analysis, Design, and Experimentation of an Isolated ZVT Boost Converter With Coupled Inductors
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DOI：
10.1109/tpel.2010.2065815
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发表时间：
2011-02
影响因子：
6.7
通讯作者：
Yi Zhao;Wuhua Li;Yan Deng;Xiangning He
中科院分区：
文献类型：
--
作者：
Yi Zhao;Wuhua Li;Yan Deng;Xiangning He
针对大功率、高升压、隔离的要求，提出了一种新型的带耦合电感的隔离式零电压转换升压变换器。该变换器采用输入-并联结构以分担大输入电流并降低导通损耗，而输出-串联结构则可使输出电压增益提高一倍。因此，可以应用具有低匝数比的Transformer，这使得Transformer的设计和优化变得容易。此外，有源箝位电路被用来降低开关电压应力和回收存储在漏电感中的能量。在整个开关过渡过程中实现了所有有源开关管的零电压转换，从而大大降低了开关损耗。此外，由于漏感的存在，二极管的反向恢复问题得到了部分解决。此外，磁集成技术的应用，以提高效率和减少磁性元件的尺寸。最后，一个48-V输入380-V输出1千瓦的原型工作与100 kHz的开关频率建成和测试，以证明所提出的转换器的有效性。
A novel isolated zero-voltage-transition (ZVT) boost converter with coupled inductors is proposed in this paper to satisfy the high power, high step-up, and isolated requirements. In the proposed converter, the input-parallel configuration is adopted to share the large input current and to reduce the conduction losses, while the output-series structure is employed to double the output voltage gain. Consequently, a transformer with a low turns ratio can be applied, which makes the transformer design and optimize easily. Moreover, the active clamp circuits are employed to reduce the switch voltage stress and to recycle the energy stored in the leakage inductance. The ZVT is achieved during the whole switching transition for all the active switches, so the switching losses can be reduced greatly. Furthermore, the diode reverse-recovery problem is partly solved due to the leakage inductance. In addition, the magnetic integration technology is applied to improve the efficiency and to reduce the magnetic component size. Finally, a 48-V input 380-V output 1-kW prototype operating with 100-kHz switching frequency is built and tested to demonstrate the effectiveness of the proposed converter.