采用开关电感的Buck变换器CCM和DCM特性分析

doi:10.19595/j.cnki.1000-6753.tces.211334

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Abstract Buck DC-DC converters with switched inductor can broaden the voltage conversion range and reduce the device current stress. However, in this paper, it is found that the series-parallel switching of the switched inductor unit will make the equivalent current equal to or twice the single inductor current, resulting in an uncertain relationship with the load current and making the converter a non-minimum phase system. Taking the switched inductor Buck converter (SLBC) as an example, based on the operation principle, it is pointed out that there are six matching relationships between the switched inductor unit current and the load current in the continuous conduction mode (CCM), which are closely related to the inductance & duty cycle and affect the output voltage ripple, and there is also a negative regulation phenomenon. In the discontinuous conduction mode (DCM), there is only one correspondence between the switched inductor unit current and the load current, and there is no negative regulation phenomenon. The small signal model of the SLBC is established using the conventional state-space averaging method and the full-order model area method in the CCM and the DCM respectively. It is shown that the RHPZ exists in this converter and the system characteristics are similar to a step-up DC-DC converter. Based on the six matching relationships and the relative position of the RHPZ, the best selection area of inductance and capacitance is given to meet the requirements of steady-state ripple and dynamic response comprehensively. Finally, the correctness of the analysis in this paper is verified by experiments.

Key words： Switched inductor Buck small signal modeling right half plane zero parameter design

Received: 23 August 2021

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TM46

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	Qi Jingjing
	Wu Xuezhi
	Wang Jiuhe
	Xu Wenzheng
	Liu Jingdou

Cite this article:

Qi Jingjing,Wu Xuezhi,Wang Jiuhe等. Characteristics Analysis of Buck Converter with Switched Inductor in CCM and DCM[J]. Transactions of China Electrotechnical Society, 2022, 37(16): 4155-4168.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211334 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I16/4155

[1] 丁杰, 高双, 赵世伟, 等. 基于耦合电感的对称式交错并联低输入电流纹波高增益DC-DC变换器[J].电工技术学报, 2021, 36(7): 1507-1515.
Ding Jie, Gao Shuang, Zhao Shiwei, et al.Symmetrical interleaved low input current ripple high step-up DC-DC converter based on coupled indu- ctor[J]. Transactions of China Electrotechnical Society, 2021, 36(7): 1507-1515.
[2] Yau Y T, Jiang Wenzhuang, Hwu K I.Ultrahigh step-down converter with wide input voltage range based on topology exchange[J]. IEEE Transactions on Power Electronics, 2017, 32(7): 5341-5364.
[3] 苏冰, 王玉斌, 王璠, 等. 基于耦合电感的多相交错并联双向DC-DC变换器及其均流控制[J]. 电工技术学报, 2020, 35(20): 4336-4349.
Su Bing, Wang Yubin, Wang Fan, et al.Multi-phase interleaved bidirectional DC-DC converter with coupled inductors and current sharing control strategy[J]. Transactions of China Electrotechnical Society, 2020, 35(20): 4336-4349.
[4] 李洪珠, 刘飞扬, 刘艳, 等. 一种新型磁集成高增益耦合电感倍压Boost变换器[J]. 电工技术学报, 2020, 35(增刊2): 450-460.
Li Hongzhu, Liu Feiyang, Liu Yan, et al.A new magnetically integrated high gain coupled inductance voltage-doubled Boost converter[J]. Transactions of China Electrotechnical Society, 2020, 35(S2): 450-460.
[5] Axelrod B, Berkovich Y, Ioinovici A.Switched- capacitor/switched-inductor structures for getting transformerless hybrid DC-DC PWM converters[J]. IEEE Transactions on Circuits and Systems I: Regular Papers, 2008, 55(2): 687-696.
[6] Cornea O, Hulea D, Muntean N, et al.Step-down switched-inductor hybrid DC-DC converter for small power wind energy conversion systems with hybrid storage[J]. IEEE Access, 2020, 8: 136092-136107.
[7] Arfin S, Mamun A A, Mahmood S N, et al.Ćuk derived SC-SL based high step down hybrid DC-DC converter[C]//2019 4th International Conference on Electrical Information and Communication Technology (EICT), Khulna, Bangladesh, 2019: 1-5.
[8] Rahman M A, Sakib S, Sarowar G, et al.A hybrid DC-DC Buck converter for very low voltage gain at high efficiency[C]//2017 IEEE Region 10 Humani- tarian Technology Conference (R10-HTC), Dhaka, Bangladesh, 2017: 710-713.
[9] Yang L, Chang E, Lin C.Study of a DC-DC converter with large step-down voltage conversion[C]//2013 International Symposium on Next-Generation Electro- nics, Kaohsiung, Taiwan, 2013: 465-468.
[10] 荣德生, 孙瑄瑨, 刘飞杨, 等. 一种新型磁集成二次型开关电感单元[J]. 电机与控制学报, 2020, 24(4): 131-140.
Rong Desheng, Sun Xuanjin, Liu Feiyang, et al.Integrated magnetic quadratic switched-inductor unit[J]. Electric Machines and Control, 2020, 24(4): 131-140.
[11] 杨惠, 晁凯悦, 孙向东, 等. 基于矢量作用时间的双向DC-DC变换器预测电流控制方法[J]. 电工技术学报, 2020, 35(增刊1): 70-80.
Yang Hui, Chao Kaiyue, Sun Xiangdong, et al.Predictive current control method for bidirectional DC-DC converter based on optimal operating time of vector[J]. Transactions of China Electrotechnical Society, 2020, 35(S1): 70-80.
[12] 苏善伟, 朱波, 向锦武, 等. 非线性非最小相位系统的控制研究综述[J]. 自动化学报, 2015, 41(1): 9-21.
Su Shanwei, Zhu Bo, Xiang Jinwu, et al.A survey on the control of nonlinear non-minimum phase systems[J]. Acta Automatica Sinica, 2015, 41(1): 9-21.
[13] Bose S, Hote Y V, Hanwate S D.Analysis of practical non-minimum phase systems by transfer function approach[C]//2018 4th International Conference on Electrical Energy Systems (ICEES), Chennai, India, 2018: 500-505.
[14] 皇金锋, 李林鸿, 谢锋, 等. 含有右半平面零点的开关DC-DC变换器暂态性能分析及频域法设计[J].电工技术学报, 2020, 35(10): 2170-2180.
Huang Jinfeng, Li Linhong, Xie Feng, et al.Transient performance analysis and frequency domain design of switched DC-DC converters with right half plane zero[J]. Transactions of China Electrotechnical Society, 2020, 35(10): 2170-2180.
[15] Rana N, Kumar M, Ghosh A, et al.A novel interleaved tri-state boost converter with lower ripple and improved dynamic response[J]. IEEE Transa- ctions on Industrial Electronics, 2018, 65(7): 5456-5465.
[16] Poorali B, Adib E.Right-half-plane zero elimination of boost converter using magnetic coupling with forward energy transfer[J]. IEEE Transactions on Industrial Electronics, 2019, 66(11): 8454-8462.
[17] Zhang Yan, Liu Jinjun, Dong Zhuo, et al.Dynamic performance improvement of diode-capacitor-based high step-up DC-DC converter through right-half- plane zero elimination[J]. IEEE Transactions on Power Electronics, 2017, 32(8): 6532-6543.
[18] Sun Jian, Mitchell D M, Greue M F, et al.Averaged modeling of PWM converters operating in discon- tinuous conduction mode[J]. IEEE Transactions on Power Electronics, 2001,16(4): 482-492.
[19] Paduvalli V V, Taylor R J, Hunt L R, et al.Mitigation of positive zero effect on nonminimum phase boost DC-DC converters in CCM[J]. IEEE Transactions on Industrial Electronics, 2018, 65(5): 4125-4134.