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http://dx.doi.org/10.6113/JPE.2019.19.1.201

Multimode Hybrid Control Strategy of LLC Resonant Converter in Applications with Wide Input Voltage Range  

Li, Yan (School of Electrical Engineering, Beijing Jiaotong University)
Zhang, Kun (School of Electrical Engineering, Beijing Jiaotong University)
Yang, Shuaifei (School of Electrical Engineering, Beijing Jiaotong University)
Publication Information
Journal of Power Electronics / v.19, no.1, 2019 , pp. 201-210 More about this Journal
Abstract
This paper proposes a multimode hybrid control strategy that can achieve zero-voltage switching of primary switches and zero-current switching of secondary rectifier diodes in a wide input voltage range for full-bridge LLC resonant converters. When the input voltage is lower than the rated voltage, the converter operates in Mode 1 through the variable-frequency control strategy. When the input voltage is higher than the rated voltage, the converter operates in Mode 2 through the VF and phase-shift control strategy until the switching frequency reaches the upper limit. Then, the converter operates in Mode 3 through the constant-frequency and phase-shift control strategy. The secondary-side diode current will operate in the discontinuous current mode in Modes 1 and 3, whereas it will operate in the boundary current mode in Mode 2. The current RMS value and conduction loss can be reduced in Mode 2. A detailed theoretical analysis of the operation principle, the voltage gain characteristics, and the realization method is presented in this paper. Finally, a 500 W prototype with 100-200 V input voltage and 40 V output voltage is built to verify the feasibility of the multimode hybrid control strategy.
Keywords
BCM; LLC resonant converter; Multimode hybrid control; Wide input voltage;
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1 F. Q. Bo and J. F. Shen, “Z-source resonant DC-DC converter for wide input voltage,” Techniques of Automation & Applications, Vol. 32, No. 10, pp. 46-55, Oct. 2013.
2 S. L. Du, X. Y. Jia, C. S. Hu, and D. H. Xu, “Characterization of phase shift control of LLC resonant converter,” Power Electronics, Vol. 50, No. 9, pp. 51-53, Sep. 2016.
3 T. LaBella, W. S. Yu , J.S Lai , M. Senesky, and D. Anderson, "A bidirectional-switch-based wide-input range high-efficiency isolated resonant converter for photovoltaic applications," IEEE Trans. Power Electron., Vol. 29. No. 7, pp. 3473-3484, Jul. 2014.   DOI
4 D. K. Kim, S. C. Moon, C. O Yeon, and G. W. Moon, “High-efficiency LLC resonant converter with high voltage gain using an auxiliary LC resonant circuit,” IEEE Trans. Power Electron., Vol. 31, No. 10, pp. 6901-6909, Oct. 2016.   DOI
5 Y. Zhang, J. L. Shi, and L. Zhou, “Wide input-voltage range boost three-level DC-DC converter with quasi-Z source for fuel cell vehicles,” IEEE Trans. Power Electron., Vol. 32, No. 9, pp. 6728-6738, Sep. 2017.   DOI
6 P. P. Meng, X. Wu, C. Zhao, J. Zhang, and Z. Qian, “A novel variable frequency soft switching full-bridge DC/DC converter with critical continuous mode control,” Proceedings of the CSEE, Vol. 32, No. 6, pp. 106-112, Feb. 2012.
7 K. Jin and X. B. Ruan, “Hybrid full bridge three-level LLC resonant converter,” Proceedings of the CSEE, Vol. 26, No. 3, pp. 53-58, Jan. 2006.
8 H. Y. Li, W. Zhen, L. Zhao, and J. H. Zhang, “Multi-level control strategy of wide input LLC resonant converter,” Trans. China Electrotechnical Soc., Vol. 32, No. 4, pp. 48-57, Feb. 2017.
9 J. W. Zhang and F. D. Zhou, “A full-bridge LLC voltagemultiplying resonant converter base on phase-shifted control,” Power Electronics, Vol. 47, No. 5, pp. 94-103, May. 2013.
10 J. Li and X. B. Ruan, “Research on the hybrid control strategy of full bridge LLC converter,” Trans. China Electrotechnical Soc., Vol. 28, No. 4, pp. 72-80, Mar. 2013.
11 F. C. Lee, "High-frequency quasi-resonant converter technologies," Proc. IEEE, Vol. 76, No. 4, pp.377-390, Apr. 1988.   DOI
12 X. Ruan, Z. Chen, and W. Chen, “Zero-voltage-switching PWM hybrid full-bridge three-level converter,” IEEE Trans. Power Electron., Vol. 20, No. 2, pp. 395-404, Feb. 2005.   DOI
13 L.Shi, B.P. Baddipadiga, M. Ferdowsi, and M. L. Crow, “Improving the dynamic response of a flying-capacitor three-level Buck converter,” IEEE Tran. Power Electron., Vol. 28, No. 5, pp. 2356-2365, May. 2013.   DOI
14 G. Ivensky, S. Bronshtein, and A. Abramovitz, “Approximate analysis of resonant LLC DC-DC converter,” IEEE Trans. Power Electron., Vol. 26, No. 11, pp. 3274-3284, Apr. 2011.   DOI
15 Q. C. Chen, Y. C. Ji, and J. Z. Wang, "Analysis and design of bidirectional CLLLC resonant DC-DC transformers," Proc. CSEE, Vol.34, No. 18, pp. 2898-2905, Jun. 2014.
16 H. Hu, X. Fang, F. Chen, Z. J. Shen, and I. Batareh, “A modified high-efficiency LLC converter with two transformers for wide input-voltage range application,” IEEE Trans Power Electron, Vol. 28, No. 4, pp. 1946-1960, Apr. 2013.   DOI