High-Frequency High-Efficiency GaN-Based Interleaved CRM Bidirectional Buck/Boost Converter with Inverse Coupled Inductor
High-Frequency High-Efficiency GaN-Based Interleaved CRM Bidirectional Buck/Boost Converter with Inverse Coupled Inductor
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DOI：
10.1109/tpel.2015.2476482
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发表时间：
2016-06
影响因子：
6.7
通讯作者：
Xiucheng Huang;F. Lee;Qiang Li;W. Du
中科院分区：
文献类型：
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作者：
Xiucheng Huang;F. Lee;Qiang Li;W. Du
提出了一种基于GaN器件的高频高效率交错临界电流模式（CRM）双向Buck/Boost变换器，该变换器采用反向耦合电感。由于GaN器件的开关损耗和驱动损耗小，开关频率持续驱动到兆赫范围，这大大减小了无源元件的尺寸。耦合电感器由于一定的直流磁通减少而进一步减小了磁芯体积。详细分析了等效电感和反向耦合电感对CRM Buck-Boost变换器的影响。反耦合电感的谐振周期小于非耦合电感的谐振周期，有利于高频工作。在CRM中使用反向耦合电感，既提高了软开关范围，又提高了循环能量。实验结果验证了理论分析的正确性，在1 MHz时，耦合电感的效率为98.5%，比非耦合电感的效率提高了0.3%。
This paper presents a high-frequency high-efficiency GaN device-based interleaved critical current mode (CRM) bidirectional buck/boost converter with an inverse coupled inductor. The switching frequency is continually driven to megahertz range with GaN devices due to their small switching loss and driving loss, which greatly reduces the size of the passive components. The coupled inductor further reduces the core volume due to certain dc flux reductions. The equivalent inductance and the impact of the inverse coupled inductor on the CRM buck-boost converter are analyzed in detail. The resonant period in CRM is less with an inverse coupled inductor than with a noncoupled inductor, which is beneficial for the high-frequency operation. The soft-switching range and the circulating energy are both improved using an inverse coupled inductor in CRM. Experimental results validate the theoretical analysis, and the coupled inductor prototype efficiency is 98.5% at 1 MHz, which is 0.3% higher than a prototype with a noncoupled inductor.