Photovoltaic: Switched-mode Power Supply and Boost Converter
5680
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 29, NO. 11, NOVEMBER 2014
A Novel Soft-Switching Boost Converter With
Magnetically Coupled Resonant Snubber
Tianwen Zhan, Yingchao Zhang, Jintong Nie, Yongchang Zhang, Member, IEEE, and Zhengming Zhao, Senior Member, IEEE
Abstract—A novel soft-switching boost converter with a magnetically coupled resonant snubber is presented in this paper. The passive snubber circuit, which is composed of two diodes, two capacitors, and one coupled inductor, ensures a zero current turn-on and zero voltage turn-off conditions for the power switch, and alleviates the reverse-recovery problem for the output diode. Moreover, with the proper design of the snubber circuit, the power switch and output diode can be softly switched in a wide load range. The operating principle and performance analysis of the proposed converter are described in detail. The experiment from a 400 W prototype has been carried out and the results show that the proposed converter has the advantages of simple structure, low complexity control, and the highest efficiency is more than 95%.
Index Terms—Boost converter, coupled inductor, passive lossless snubber, soft-switching.
I. INTRODUCTION
HE pulse width modulation boost converter is widely applied in the fields of dc–dc conversion and power factor correction. In recent years, the boost converter operating in the continuous conduction mode (CCM), is the most popular topology in high-power applications such as hybrid electric vehicles [1], fuel cell power conversion systems [2], and photovoltaic power generation [3], [4]. High power density, high efficiency, and low electromagnetic interference (EMI) are major concerns in CCM boost converters.
However, the traditional hard-switching boost converter has several inherent drawbacks such as the switching losses and the reverse-recovery problem of the output diode. These drawbacks limit the switching frequency; reduce the conversion
IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 29, NO. 11, NOVEMBER 2014
A Novel Soft-Switching Boost Converter With
Magnetically Coupled Resonant Snubber
Tianwen Zhan, Yingchao Zhang, Jintong Nie, Yongchang Zhang, Member, IEEE, and Zhengming Zhao, Senior Member, IEEE
Abstract—A novel soft-switching boost converter with a magnetically coupled resonant snubber is presented in this paper. The passive snubber circuit, which is composed of two diodes, two capacitors, and one coupled inductor, ensures a zero current turn-on and zero voltage turn-off conditions for the power switch, and alleviates the reverse-recovery problem for the output diode. Moreover, with the proper design of the snubber circuit, the power switch and output diode can be softly switched in a wide load range. The operating principle and performance analysis of the proposed converter are described in detail. The experiment from a 400 W prototype has been carried out and the results show that the proposed converter has the advantages of simple structure, low complexity control, and the highest efficiency is more than 95%.
Index Terms—Boost converter, coupled inductor, passive lossless snubber, soft-switching.
I. INTRODUCTION
HE pulse width modulation boost converter is widely applied in the fields of dc–dc conversion and power factor correction. In recent years, the boost converter operating in the continuous conduction mode (CCM), is the most popular topology in high-power applications such as hybrid electric vehicles [1], fuel cell power conversion systems [2], and photovoltaic power generation [3], [4]. High power density, high efficiency, and low electromagnetic interference (EMI) are major concerns in CCM boost converters.
However, the traditional hard-switching boost converter has several inherent drawbacks such as the switching losses and the reverse-recovery problem of the output diode. These drawbacks limit the switching frequency; reduce the conversion
References: pp. 309–316, Oct. 2008. 595, Jun. 2006. Power Electron. Motion Control Conf., 2008, pp. 383–387. Power Electron. Motion Control Conf., 2008, pp. 1929–1933. 284, Mar. 2000. Techn. Conf., 2009, pp. 1–9. 23th Int. Telecommun. Energy Conf., 2001, pp. 139–145. Trans. Power Electron., vol. 12, no. 5, pp. 922–930, Sep. 1997. Drives Syst., 2005, pp. 107–112. 741, Mar. 2009. Conf. Expo., 2010, pp. 550–556. Power Electron. Conf. Expo., 2010, pp. 801–806. vol. 25, no. 5, pp. 1211–1217, May 2010. no. 5, pp. 649–658, Sep. 2001. Ind. Electron., vol. 55, no. 1, pp. 471–473, Jan. 2008. Power Electron., vol. 25, no. 3, pp. 602–613, Mar. 2010.