正-反激变换拓扑的功率传输分配特性及设计考虑

doi:10.19595/j.cnki.1000-6753.tces.221472

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摘要通过分析正-反激变换拓扑工作于不同模式时的功率传输特性及其与负载电阻的关系,发现工作于励磁电流断续导电模式(MDCM)时的正激和反激功率均随负载电阻的减小而增大,工作于励磁电流连续导电模式(MCCM)时的正激功率维持不变,而反激功率随负载电阻减小单调增加。对于给定输出功率,推导得出了开关管电流应力与正激和反激功率之间的解析关系式,探讨了功率分配对变换拓扑效率的影响,并指出减小正激功率有利于降低开关管电流应力,而减小反激功率有利于提高变换拓扑效率。综合考虑功率传输特性对变换拓扑电气性能的影响,提出了一种在给定负载变化范围内,确保输出功率最大时使得正激功率与反激功率相等的磁性元件参数设计方法,实验结果验证了理论分析的正确性和设计方法的可行性。

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	刘树林
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关键词 ：正-反激变换拓扑, 功率传输分配, 正激功率, 反激功率, 设计

Abstract：Aiming at the problem that the unidirectional magnetization of the basic forward conversion topology will lead to the saturation of the transformer, a variety of magnetic reset measures have been proposed. Among them, the primary side magnetic reset can only consume the excitation energy on the resistance or feed back to the input side, so that the excitation energy can not be fully utilized, therefore, it is not beneficial to improving the energy transmission efficiency of the converter. The secondary-side reset forward-flyback conversion topology composed of four diodes on secondary side can not only transfer forward energy, but also transfer excitation energy to the load, thereby, the energy efficiency can be effectively improved. However, the excitation inductor and the forward inductor can affect the power transmission and distribution characteristics and the switch current stress of the conversion topology. Therefore, the relationship between the power transmission characteristics, switch current stress and the magnetic components parameters is deeply studied in this paper, and through comprehensively considering the influence of forward and flyback transmission power ratio on the electrical performance of the conversion topology, the design method of magnetic components parameters is proposed.
For the forward-flyback converter, the forward inductor can only work in DCM. Comparing the minimum excitation inductor current in one cycle with zero, its working mode can be divided into Magnetizing current Continuous Conduction Mode (MCCM) and Magnetizing current Discontinuous Conduction Mode (MDCM). Through analyzing its power transmission characteristics and its relationship with load resistance R_L under different modes, it is obtained that both the forward power P_FW and flyback power P_FB increases with the decrease of the R_L when the conversion topology works in the MDCM. When the R_L is reduced to make the conversion topology enter the MCCM, the P_FW increases to the maximum value, and no longer increases with the decrease of the R_L, while the P_FB still increases with the decrease of the R_L.
Through analyzing the influence of excitation inductance on the power transmission and distribution characteristics of the conversion topology, the critical excitation inductance L_mc corresponding to P_FW=P_FB is defined, and it is obtained that for the given output power, with the increase of excitation inductance, the P_FW increases and the P_FB decreases, and when the excitation inductor equals L_mc and the conversion topology works in MDCM, the P_FW is equal to P_FB. Through analyzing the influence of the transformer turn ratio on the transmission power ratio of the conversion topology, it is concluded that for the given output power, with the increase of the transformer turn ratio, the P_FB increases and the P_FW decreases.
Through analyzing the influence of power transmission distribution on the switch current stress, it is concluded that for the given output power, the switch current stress decreases with the decrease of P_FW, therefore, reducing the P_FW is beneficial to reducing the switch current stress. However, reducing the P_FW will result in the increase of the P_FB, while increasing the P_FB requires increasing the transformer air gap to reduce the magnetizing inductance, which will result in the increase of the transformer loss. Therefore, reducing the P_FW is not beneficial to improving the efficiency of the conversion topology.
Through analyzing the influence of the distribution of P_FW and P_FB on the electrical performance of the conversion topology, it is obtained that reducing the P_FW is beneficial to reducing the current stress of the switch, while reducing the P_FB is beneficial to improving the efficiency of the conversion topology. Therefore, in order to improve the efficiency of the conversion topology and not cause the current stress of the switch to be too high, a component parameter design method is proposed to guarantee that P_FW=P_FB when the output power reaches the maximum within the given load range.
Experimental results verify the correctness of the theoretical analysis and the feasibility of the proposed design method. The proposed components parameters design method of the forward-flyback conversion topology in this paper is helpful to the development of high-performance forward-flyback conversion topology and promote its popularization and application.

Key words： Forward-flyback conversion topology power transmission distribution forward power flyback power design

收稿日期: 2022-07-30

PACS:

TM46

基金资助:国家自然科学基金 (51777167,51604217)资助项目

通讯作者: 刘树林男,1964年生,博士,教授,博士生导师,研究方向为开关变换器的分析与设计及本质安全电路等。E-mail：lsigma@163.com

作者简介: 沈一君女,1998年生,硕士研究生,研究方向为开关变换器的分析与设计及本质安全电路。E-mail：20206029003@stu.xust.edu.cn

引用本文:

刘树林, 沈一君, 刘旭, 庹汉宇, 王成, 王文强, 吴星. 正-反激变换拓扑的功率传输分配特性及设计考虑[J]. 电工技术学报, 0, (): 64-64. Liu Shulin, Shen Yijun, Liu Xu, Tuo Hanyu, Wang Cheng, Wang Wenqiang, Wu Xing. Power Transmission Distribution Characteristics and Design Considerations of Forward-Flyback Conversion Topology. Transactions of China Electrotechnical Society, 0, (): 64-64.

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[1] R Severns.The history of the forward converter[J]. Switching Power Magazine, 2000, 20-22.
[2] C Xu, Q Ma, P Xu, et al.Closed-Loop gate drive for single-ended forward converter to reduce conducted EMI[J]. IEEE Access, 2020, 8: 123746-123755.
[3] J Lin, P Liu, C Yang.A dual-transformer active-clamp forward converter with nonlinear conversion ratio[J]. IEEE Transactions on Power Electronics, 2016, 31(6): 4353-4361.
[4] 李学峰, 吴德军, 王仕韬. 一种变模态恒定磁心复位电压双管正激变换器[J]. 电源学报, 2018, 16(1): 19-23.
Li Xuefeng, Wu Dejun, Wang Shitao.A dual-tube forward converter with variable mode constant core reset voltage[J]. Journal of Power Supply, 2018, 16(1): 19-23.
[5] 李洪珠, 刘歆俣, 李洪璠, 等. 正激变换器磁集成分析与设计准则[J]. 中国电机工程学报, 2019, 39(12): 3667-3676.
Li Hongzhu, Liu Xinmao, Li Hongfan, et al.Magnetic integration analysis and design criteria for forward converters[J]. Proceedings of the CSEE, 2019, 39(12): 3667-3676.
[6] 吴琨, 钱挺, 王浩. 一种开关频率固定的输出可调型有源钳位正激双向谐振变换器[J]. 电工技术学报, 2018, 33(20): 4771-4779.
Wu Kun, Qian Ting, Wang Hao.An output adjustable active-clamp forward bidirectional resonant converter with fixed switching frequency[J]. Transactions of China Electrotechnical Society, 2018, 33(20): 4771-4779.
[7] 吴红飞, 刘薇, 邢岩. 一族宽输入电压范围正激变换器拓扑[J].中国电机工程学报, 2012, 32(36): 29-35.
Wu Hongfei, Liu Wei, Xing Yan.A family of forward converter topologies with wide input voltage range[J]. Proceedings of the CSEE, 2012, 32(36): 29-35.
[8] 陈道炼, 范玉萍, 严仰光. 正激变换器的磁复位技术研究[J]. 电力电子技术, 1998, (1): 36-41.
Chen Daolian, Fan Yuping, Yan Yangguang.Research on magnetic reset technology of forward converter[J]. Power Electronics Technology, 1998, (1): 36-41.
[9] 王国礼, 金新民. 采用LCD箝位电路的正激DC-DC变换器[J]. 电工技术杂志, 2000, 26(12): 24-26.
Wang Guoli, Jin Xinmin.Forward DC-DC converter using LCD clamp circuit[J]. Journal of Electrotechnical Technology, 2000, 26(12): 24-26.
[10] Tao M, Ben H, Song Y, et al. Analysis and design of an input-series two-transistor forward converter for high-input voltage multiple-output applications[J]. IEEE Transactions on Industrial Electronics, 2018, PP(1): 1-1.
[11] H. Youn, J. Baek, J. Kim.Interleaved active clamp forward converter with extended operating duty ratio by adopting additional series-connected secondary windings for wide input and high current output applications[J]. IEEE Transactions on Power Electronics, 2019, 34(5): 4423-4433.
[12] Y. Jeong,J. Park, G. Moon.An interleaved active-clamp forward converter modified for reduced primary conduction loss without additional components[J]. IEEE Transactions on Power Electronics, 2020, 35(1): 121-130.
[13] J Y Lin, S Y Lee, C Y Ting, et al.Active-clamp forward converter with lossless-snubber on secondary-side[J]. IEEE Transactions on Power Electronics, 2019, 34(8): 7650-7661.
[14] Murthy-Bellur D, Kazimierczuk M K.Two-switch flyback-forward PWM DC-DC converter with reduced switch voltage stress[C]//Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010: 3705-3708.
[15] 刘树林, 王航杰, 胡传义, 等. 附加LC的正反激组合变换器辅助电感最佳工作模态及LC参数优化设计[J]. 电工技术学报,2022,37(2):389-396.
Liu Shulin, Wang Hangjie, Hu Chuanyi, et al.Optimal working mode of auxiliary inductor and LC parameter optimization design of forward and flyback combined converter with LC attached[J]. Transactions of China Electrotechnical Society, 2022, 37(2): 389-396.
[16] 刘树林,张海亮,王航杰,等.抑制输出能量倒灌的二次侧自复位正激变换器的能量传输过程分析[J].电工技术学报,2020,35(增刊2):477-483.
Shulin,Zhang Hailiang,Wang Hangjie,et al.Analysis of the energy transmission process of the secondary-side self-resetting forward converter with suppressing output energy backflow[J]. Transactions of the China Electrotechnical Society,2020,35(S2):477-483.
[17] Cao J, Liu S, Yan L, et al.Research on power transmission characteristic of forward-flyback converter[C]//2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2018.
[18] Hernán Emilio Tacca.Power factor correction using merged flyback-forward converters[J]. IEEE Transactions on Power Electronics, 2000, 15(4): 585-594.
[19] Dong H, Xie X, Jiang L, et al.An electrolytic capacitor-less high power factor LED driver based on a "One-and-a-Half Stage" Forward-flyback Topology[J]. IEEE Transactions on Power Electronics, 2018, 33(2): 1572-1584.
[20] 孟涛, 安彦桦, 贲洪奇. 输入串联型变换器集成变压器的分布电容影响机制与绕组布局方法[J]. 电工技术学报, 2021, 36(24): 5272-5282.
Meng Tao, An Yanhua, Ben Hongqi.Stray capacitances influences and windings layout of the integrated-transformer in the input-series converter[J]. Transactions of China Electrotechnical Society, 2021, 36(24): 5272-5282.
[21] 王迎迎, 程红. 应用于功率变换器的多绕组高频变压器模型[J]. 电工技术学报, 2021, 36(19): 4140-4147.
Wang Yingying, Cheng Hong.Dual multi-winding high-frequency transformer equivalent circuit for power converter applications[J]. Transactions of China Electrotechnical Society, 2021, 36(19): 4140-4147.
[22] 郭向伟, 耿佳豪, 刘震, 等. 基于反激变换器的双目标直接均衡方法[J]. 电工技术学报, 2021, 36(6): 1269-1278.
Guo Xiangwei, Geng Jiahao, Liu Zhen, et al.The dual-objective direct balancing method based on flyback converter[J]. Transactions of China Electrotechnical Society, 2021, 36(06): 1269-1278.
[23] 李科峰, 肖飞, 刘计龙, 等. 多电平有源中点钳位逆变器串联IGBT均压方法[J]. 电力系统自动化, 2022, 46(2): 163-170.
Li Kefeng, Xiao Fei, Liu Jilong, et al.Voltage balancing method of series-connected IGBTs for multi-level active neutral point clamped inverter[J]. Automation of Electric Power System, 2022, 46(2): 163-170.
[24] 刘树林, 曹剑, 胡传义, 等. 正-反激组合变换器的能量传输模式及输出纹波电压分析[J]. 电工技术学报, 2019, 34(8): 1648-1656.
Liu Shulin, Cao Jian, Hu Chuanyi, et al.Energy transfer mode and output ripple voltage analysis of forward-flyback combined converter[J]. Transactions of China Electrotechnical Society, 2019, 34(8): 1648-1656.
[25] 尹浩, 苏建徽, 赖纪东, 等. 中频圆导线变压器漏感的精确解析计算[J].电工技术学报, 2021, 36(15): 3211-3220.
Yin Hao, Su Jianhui, Lai Jidong, et al.Accurate analytical calculation of leakage inductance of round conductor transformer under the medium frequency[J]. Transactions of China Electrotechnical Society, 2021, 36(15): 3211-3220.