Resonant Capacitor Voltage Feedback of Single-Input Multi-Output Flyback Converter
Wang Wu1, 2, Lu Dexiang1, 2, Lin Qiongbin1, 2, Cai Fenghuang1, 2
1. College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350116 China; 2. Fuzhou University-Kehua Hengsheng Power Electronics Technology Research CenterFuzhou 350116 China
Abstract A resonant capacitor voltage feedback control method for an asymmetrical half-bridge flyback converter is proposed in this paper. It can reduce the number of devices, save the costs and improve the efficiency in low power supply applications. By using this control method, the control structure of the isolated single-input multi-output converter is simplified. Moreover, there is no compensating circuit for the designed constant on-time controller. Since the feedback voltage signal for the control strategy is taken from the primary side resonant capacitor, it has large voltage ripple resulting in the pulse bursting phenomenon of constant on-time control, which makes the converter unstable. To restrain the pulse bursting phenomenon caused by the large voltage ripple, the constant on-time control with ripple compensation is used to suppress the feedback signal voltage ripple. Thus, the stability of the converter is guaranteed. Finally, the experimental prototype has verified the theoretical analysis and designing method.
Wang Wu,Lu Dexiang,Lin Qiongbin等. Resonant Capacitor Voltage Feedback of Single-Input Multi-Output Flyback Converter[J]. Transactions of China Electrotechnical Society, 2017, 32(14): 96-105.
[1] 胡腾, 许烈, 李永东, 等. 混合电动汽车多电平车载变换器的研究[J]. 电工技术学报, 2015, 30(14): 261-268. Hu Teng, Xu Lie, Li Yongdong, et al. Research of multilevel converters on HEV[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 261- 268. [2] 胡亮灯, 孙驰, 赵治华, 等. 高电压宽范围输入低电压输出的DC-DC辅助电源设计[J]. 电工技术学报, 2015, 30(3): 103-114. Hu Liangdeng, Sun Chi, Zhao Zhihua, et al. Design of wide-range high voltage input low voltage output DC-DC auxiliary power supply[J]. Transactions of China Electrotechnical Society, 2015, 30(3): 103-114. [3] Ray O, Josyula A P, Mishra S, et al. Integrated dual-output converter[J]. IEEE Transactions on Industrial Electronics, 2015, 62(1): 371-382. [4] Zheng Y, Ho M, Leung K N, et al. A fixed-frequency auto-Buck-Boost SIMO DC-DC converter with duty-cycle redistribution and duty-predicted current control[C]//IEEE International Symposium on Circuits and Systems (ISCAS), Lisbon, Portugal, 2015: 225-228. [5] Nami A, Zare F, Ghosh A, et al. Multi-output DC-DC converters based on diode-clamped converters configuration: topology and control strategy[J]. IET Power Electronics, 2010, 3(2): 197-208. [6] 卢增艺, 陈为, 章进法. 磁集成开关变换器的小信号建模方法[J]. 电工技术学报, 2015, 30(24): 103-109. Lu Zengyi, Chen Wei, Zhang Jinfa. Small signal modeling methods of switched-mode converter with magnetic integration[J]. Transactions of China Electrotechnical Society, 2015, 30(24): 103-109. [7] Ferreres A, Carrasco J A, Sanchis E, et al. Application of a novel parallel regulation technique in a two output forward converter[C]//30th Annual IEEE Power Electronics Specialists Conference, 1999, 2: 914-919. [8] 马红波, 刘文军, 邱忠才, 等. 基于LLC谐振变换器的准单级式悬浮控制电源[J]. 电工技术学报, 2014, 29(增刊1): 210-217. Ma Hongbo, Liu Wenjun, Qiu Zhongcai, et al. Quasi-single-stage power supply based on LLC topology for magnetic levitation control system applications[J]. Transactions of China Electro- technical Society, 2014, 29(S1): 210-217. [9] 苏少侃, 阮新波, 叶志红. 自激式LLC谐振变换器[J]. 电工技术学报, 2011, 26(12): 85-92. Su Shaokan, Ruan Xinbo, Ye Zhihong. A self- oscillating LLC resonant converter[J]. Transactions of China Electrotechnical Society, 2011, 26(12): 85-92. [10] Fang X, Meng Y. Isolated bias power supply for IGBT gate drives using the fly-Buck converter[C]// IEEE Applied Power Electronics Conference and Exposition (APEC), Charlotte, NC, USA, 2015: 2373-2379. [11] Lo Y K, Yen S C, Song T H. Analysis and design of a double-output series-resonant DC-DC converter[J]. IEEE Transactions on Power Electronics, 2007, 22(3): 952-959. [12] 江添洋, 张军明, 汪槱生. 同步控制双向LLC谐振变换器[J]. 电工技术学报, 2015, 30(12): 87-96. Jiang Tianyang, Zhang Junming, Wang Yousheng. Bidirectional LLC resonant converter with syn- chronous control method[J]. Transactions of China Electrotechnical Society, 2015, 30(12): 87-96. [13] 赵晋斌, 刘金彪, 梁晓霞, 等. 一种新型交错式反激变换器分析与设计[J]. 电力系统保护与控制, 2015, 43(18): 129-137. Zhao Jinbin, Liu Jinbiao, Liang Xiaoxia, et al. Analysis and design of a new interleaved flyback converter[J]. Power System Protection and Control, 2015, 43(18): 129-137. [14] Jang J, Kumar P S, Kim D, et al. Average current- mode control for LLC series resonant DC-to-DC converters[C]//7th IEEE International on Power Electronics and Motion Control Conference (IPEMC), Harbin, China, 2012, 2: 923-930. [15] Xi Y, Jain P K. A forward converter topology with independently and precisely regulated multiple outputs[J]. IEEE Transactions on Power Electronics, 2003, 18(2): 648-658. [16] Kim H S, Jung J H, Baek J W, et al. Analysis and design of a multioutput converter using asymmetrical PWM half-bridge flyback converter employing a parallel-series transformer[J]. IEEE Transactions on Industrial Electronics, 2013, 60(8): 3115-3125. [17] Deepa K, Deepti T, Kumar V. New multi-output switching converter with low drop out post regu- lator[C]//IEEE International Conference on Emerging Trends in Communication, Control, Signal Pro- cessing & Computing Applications (C2SPCA), Tirunelveli, India, 2013: 1-6. [18] 丁顺, 沈昂, 钱彬, 等. 一种磁反馈临界连续反激变换器[J]. 电力电子技术, 2013, 47(8): 11-12. Ding Shun, Shen Ang, Qian Bin, et al. A critical conduction mode flyback converter using magnetic feedback[J]. Power Electronics, 2013, 47(8): 11-12. [19] 马皓, 祁丰. 一种改进的LLC变换器谐振网络参数设计方法[J]. 中国电机工程学报, 2008, 28(33): 6-11. Ma Hao, Qi Feng. An improved design method for resonant tank parameters of LLC resonant con- verter[J]. Proceedings of the CSEE, 2008, 28(33): 6-11. [20] Jee-Hoon Jung, Joong-Gi Kwon. Soft switching and optimal resonance conditions of APWM HB flyback converter for high efficiency under high output current[C]//PESC Record-IEEE Annual Power Elec- tronics Specialists Conference, Rhodes, Greece, 2008: 2994-3000. [21] Wang J, Xu J, Bao B. Analysis of pulse bursting phenomenon in constant-on-time-controlled Buck converter[J]. IEEE Transactions on Industrial Elec- tronics, 2011, 58(12): 5406-5410. [22] Wang J, Bao B, Xu J, et al. Dynamical effects of equivalent series resistance of output capacitor in constant on-time controlled Buck converter[J]. IEEE Transactions on Industrial Electronics, 2013, 60(5): 1759-1768. [23] Texas Instruments Inc., LM5017 Datasheet: 100V, 600mA Constant On-Time Synchronous Buck Regu- lator[Z]. Dec. 2013. [24] 毛行奎, 陈为. 反激式变换器的变压器线圈涡流损耗机制分析与新型损耗模型[J]. 中国电机工程学报, 2009, 29(3): 101-110. Mao Xingkui, Chen Wei. Mechanism investigation and analytical modeling for winding loss of flyback transformer[J]. Proceedings of the CSEE, 2009, 29(3): 101-110.
2017, Vol. 32 
