集成耦合电感升压–反激变换器的建模及控制研究

摘要/Abstract

摘要：

提出了一种高效率、高增益的升压DC-DC变换器——集成耦合电感升压–反激变换器。该变换器克服了传统升压电路高升压比对占空比的依赖,可在较小占空比下实现更高电压增益。与传统升压–反激变换器相比,可有效减小电容电压纹波,降低二极管反向恢复损耗。简要分析了该变换器的工作原理,使用状态空间平均法建立了在电流连续工作模式（CCM）下的小信号模型。由模型得到控制量至输出量的传递函数,设计出相应闭环控制系统。通过仿真研究证明了闭环系统的稳定性及建模方法的正确性,并在实验室设计30W样机对变换器进行实验验证。经实验、仿真结果和理论分析的比较,验证了理论分析的正确性和可行性。

关键词: 升压变换器, 状态空间平均法, 小信号模型, 闭环控制

Abstract:

A boost DC-DC converter, with high efficiency and high voltage gain and integrated with coupled-inductor boost flyback converter, is proposed in this paper. The dependence on duty cycle to realize high set-up ratio, in the conventional boosted circuit, is eliminated in this paper so that the converter can fulfill higher voltage gain using relatively small cycle duty. In comparison to traditional methods, this will effectively decrease voltage ripple of capacitor and lower the reverse recovery loss of diode. Firstly, this paper has a brief analysis of the operating principle of this converter and a small-signal model is established by using state space averaging method in continuous conduction mode(CCM). Secondly, the transfer function of control parameters to output parameters is, according to the model, built and correspondingly the closed-loop control system is designed via this function. Finally, the stability of closed-loop system and the accuracy of way of constructing model are verified in the stimulation. In the meantime, a 30W prototype that is used to test the performance of this converter is designed. The accordance of the results from stimulation and analysis demonstrates the correctness and feasibility of theoretical analysis of the model of proposed converter.

Key words: Step-up converter, state space averaging method, small signal model, closed-loop system

中图分类号:

TM46

王伯荣,丁新平,王天兵,苑红. 集成耦合电感升压–反激变换器的建模及控制研究[J]. 电气工程学报, 2015, 10(6): 33-40.

Wang Borong,Ding Xinping,Wang Tianbing,Yuan Hong. Modeling and Control of Integrated Coupled-Inductor Boost-Flyback Converter[J]. Journal of Electrical Engineering, 2015, 10(6): 33-40.

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参考文献 13

[1]	Zhao Q, Tao F, Lee F C . A front-end DC-DC converter for network server applications[C]. Proceedings of the IEEE Power Electronics Specialists Conference, 2001: 1535-1539.
[2]	Zhao Qun, Lee F C . High Performance Coupled-Inductor DC-DC Converter[C]. Proceedings of the IEEE APEC Conference, 2003: 109-113.
[3]	Zhang Junming, Huang Xiucheng, Wu Xinke , et al. A high efficiency flyback converter with new active clamp technique[J]. IEEE Transactions on Power Electronics 2010,25(7):1775-1785. doi: 10.1109/TPEL.2010.2042302
[4]	Zhao Qun, Lee F C . High-efficiency, high step-up DC-DC converters[J]. IEEE Transactions on Power Electronics, 2003,18(1):65-73. doi: 10.1371/journal.pone.0206691 pmid: 30500857
[5]	Liang T J, Tseng K C . Analysis of integrated boost-flyback step-up converter[J]. IEEE Proceedings-Electric Power Applications, 2005,152(2):217-225. doi: 10.1049/ip-epa:20045003
[6]	Seo Sang Uk, Lee Kui Jun, Kim Rac Young , et al. Aggregated modeling and control of integrated boost-flyback high step-up converter[C]. IEEE 37th Annual Conference on Industrial Electronics Society 2011: 1191-1196.
[7]	Rajeev M . An input current shaper with boost and flyback converter using integrated magnetics[C]. 5th International Conference on Power Electronics and Drive System, 2003: 327-331.
[8]	Lin Bor Ren, Chao Chia Hung, Chien Chih Cheng . Interleaved boost-flyback converter with boundary conduction mode for power factor correction[C]. 6th IEEE Conference on Industrial Electronics and Applications, 2011: 1828-1833.
[9]	Lee Jong Hyun, Park Joung Hu, Jeon J H , Series- connected forward-flyback converter for high step-up power conversion. IEEE Transactions on Power Electronics, 2011,26(12):3629-3261. doi: 10.1109/TPEL.2011.2162747
[10]	Spiazzi G, Mattavelli P, Gazoli J R , et al. Improved integrated boost-flyback high step-up converter[C]. IEEE International Conference on Industrial Technology, 2010: 1169-1174.
[11]	Lee Jhuo Yan, Yang Lung Sheng, Tsrong , et al. Analysis and implementation of interleaved single-stage single-phase AC-DC boost-flyback converter[C]. IEEE International Power Electronics and Motion Control Conference 2009: 619-621.
[12]	侯世英, 陈剑飞, 孙韬 , 等. 基于switch-capacitor网络的单开关升压变换器[J]. 电工技术学报, 2009,24(10):206-216.
	Hou Shiying, Chen Jianfei, Sun Tao , et al. A single-switch step-up converter based on switch-capacitor network[J]. Transactions of China Electrotechnical Society, 2009,24(10):206-216.
[13]	罗全明, 闫欢, 孙明坤 , 等. 基于拓扑组合的高增益Boost变换器[J]. 电工技术学报, 2012,27(6):96-102.
	Luo Quanming, Yan Huan, Sun Mingkun , et al. High step-up boost converter based on topology combination[J]. Transactions of China Electrotechnical Society, 2012,27(6):96-102.

参数	取值	参数	取值
V_i/V	5	r_e1/Ω	0.04
R_L/Ω	150	r_e2/Ω	0.5
f_s/kHz	20	r_e3/Ω	0.5
D	0.5	N₁∶N₂∶N₃	1∶4∶4
L/μH	210	R_L₁/kΩ	9
C/μF	470	R_L2/kΩ	1
V_o/V	50	V_m/V	5