An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

作者：Luo, Quanming^*; Zhang, Yang; Sun, Pengju; Zhou, Luowei

来源：Journal of Power Electronics, 2015, 15(1): 86-95.

DOI：10.6113/JPE.2015.15.1.86

• Active clamp
• Coupled inductor
• High step-up
• Zero-voltage-switching

An active clamp high step-up boost converter with a coupled inductor is proposed in this paper. In the proposed strategy, a coupled inductor is adopted to achieve a high voltage gain. The clamp circuit is included to achieve the zero-voltage-switching (ZVS) condition for both the main and clamp switches. A rectifier composed of a capacitor and a diode is added to reduce the voltage stress of the output rectifier diode. As a result, diodes with a low reverse-recovery time and forward voltage-drop can be utilized. Since the voltage stresses of the main and clamp switches are far below the output voltage, low-voltage-rated MOSFETs can be adopted to reduce conduction losses. Moreover, the reverse-recovery losses of the diodes are reduced due to the inherent leakage inductance of the coupled inductor. Therefore, high efficiency can be expected. Firstly, the derivation of the proposed converter is given and the operation analysis is described. Then, a steady-state performance analysis of the proposed converter is analyzed in detail. Finally, a 250 W prototype is built to verify the analysis. The measured maximum efficiency of the prototype is 95%.

• 出版日期2015-1
• 单位重庆大学; 输配电装备及系统安全与新技术国家重点实验室