一种ICPT系统松耦合线圈最佳径距比的设计方法

doi:10.11985/2018.01.002

摘要/Abstract

摘要：

传统的感应耦合电能传输（ICPT）系统中,松耦合变压器接收线圈Rx的半径与发射线圈Tx到接收线圈Rx之间的距离h的最佳比例系数,即径距比γ的求取,是通过系统建模来推出Tx和Rx间的互感值,并辅以大量实验来获得的。针对这种缺少理论依据并浪费人力、物力的问题,本文提出了一种通过仿真观察Rx中电流密度变化规律来获得Rx半径与h比例系数的最佳值的设计方法。首先求取单管ICPT系统之一次侧并联、二次侧并联（PP）结构下的系统去耦等效电路模型,据此推导出Rx上的电流密度和互感M、系统传输功率的关系;并通过公式分析,确定Rx电感L₁与Tx 电感L₂的比值a和系统的耦合系数λ的取值,来确定在不同频率下L₁和L₂的值,从而建立仿真模型,利用有限元仿真软件对γ的最优值进行研究。相比于通过线圈互感值来优化线圈的方法,本文中的电流密度可以通过软件直接观测到,形象而且直观,节省时间和成本,有效提高设计效率。综合仿真结果确定了松耦合线圈最佳径距比γ,该参数与企业通过生产实践总结出的经验值相吻合。

关键词: 单管逆变, 感应耦合电能传输, 径距比, 电流密度, 有限元仿真

Abstract:

In the traditional system of ICPT, to calculate the optimal ratio of the receiving coils(Rx) of loosely coupled transformer coil and the distance between the transmitting coil (Tx) and the receiving coil (Rx), That is, radius-center distance ratio γ, usually by system modeling to project the mutual inductance value between the Tx and the Rx and supplemented by a large number of experiments. It not only lack theoretical basis but also waste manpower and material resources in this way. Pointing to this problem, this paper proposes a design method, using by simulating and observing the change rules of current density, to obtain the optimal radius-center distance ratio γ. Firstly, the system decoupling equivalent circuit model, that primary and secondary coils are in parallel compensation (PP) structure of the single switch inverter ICPT system, is used to derive the relationship among the current density, mutual inductance (M), system transmission power. Through the formula analysis, the ratio of the Rx inductance (L₁) to the Tx inductance (L₂) and the value of the coupling coefficient λ of the system are determined, and to determine the values of L₁ and L₂ at different frequencies. The simulation model is established in this way and using the finite element simulation software to study the optimal value of γ. Compared with the method of optimizing the coil through the coil mutual inductance value, the current density in this paper can be directly observed by software, vivid, save time and cost, and improve the design efficiency effectively. The simulation results show that the optimal radius-center distance ratio (γ) of loosely coupled coils is consistent with the empirical values summed up by the enterprise experiments.

Key words: Single switch inverter, inductive coupled power transfer, radius-center distance ratio, current density, finite element simulation

中图分类号:

TM15

李政泰,王春芳,魏芝浩,李聃. 一种ICPT系统松耦合线圈最佳径距比的设计方法[J]. 电气工程学报, 2018, 13(1): 9-15.

Zhengtai Li,Chunfang Wang,Zhihao Wei,Dan Li. A Design Method on Optimal Radius-Center Distance Ratio of Loosely Coupled Transformer Coil in the System of ICPT[J]. Journal of Electrical Engineering, 2018, 13(1): 9-15.

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参考文献 15

[1]	王振亚, 王学梅, 张波 , 等. 电动汽车无线充电技术的研究进展[J]. 电源学报, 2014,12(3):27-32.
	Wang Zhenya, Wang Xuemei, Zhang Bo , et al. Advances of wireless charging technology in electric vehicle[J]. Journal of Power Supply, 2014,12(3):27-32.
[2]	廖承林, 李均锋, 陶成轩 , 等. 无线电能传输系统控制方法综述[J]. 电气工程学报, 2015,10(6):1-6.
	Liao Chenglin, Li Junfeng, Tao Chengxuan , et al. A review on control methods for wireless power transfer system[J]. Journal of Electrical Engineering, 2015,10(6):1-6.
[3]	高键鑫, 吴旭升, 高嵬 , 等. 电磁感应式非接触电能传输技术研究综述[J]. 电源学报, 2017,15(2):166-178.
	Gao Jianxin, Wu Xusheng, Gao Wei , et al. Review on inductive contactless power transfer technology[J]. Journal of Power Supply, 2017,15(2):166-178.
[4]	曹玲玲, 陈乾宏, 任小永 , 等. 电动汽车高效率无线充电技术的研究进展[J]. 电工技术学报, 2012,27(8):1-13.
	Cao Lingling, Chen Qianhong, Ren Xiaoyong , et al. Review of the efficient wireless power transmission technique for electric vehicles[J]. Transactions of China Electrotechnical Society, 2012,27(8):1-13.
[5]	Aditya K, Williamson S S . Design considerations for loosely coupled inductive power transfer(IPT)system for electric vehicle battery charging-A comprehensive review[C].Transportation Electrification Conference and Expo, 2014: 1-6.
[6]	Jean-Romain Sibué, Kwimang G, Jean-Paul Ferrieux , et al. A global study of a contactless energy transfer system: analytical design, virtual prototyping, and experimental validation[J]. IEEE Transactions on Power Electronics, 2013,28(10):4690-4699.
[7]	夏晨阳, 解光庆, 林克章 , 等. 双LCL补偿ICPT系统双谐振点特性及最大输出功率研究[J]. 中国电机工程学报, 2016,36(19):5200-5208,5401.
	Xia Chenyang, Xie Guangqing, Lin Kezhang , et al. Study of dual resonance point characteristics and maximum output power of ICPT based on double LCL compensation[J]. Proceedings of the CSEE, 2016,36(19):5200-5208, 5401.
[8]	黄晓生, 陈为 . 用于磁感应耦合式电能传输系统的新型补偿网络[J]. 中国电机工程学报, 2014,34(18):3020-3026.
	Huang Xiaosheng, Chen Wei . A novel compensation network for ICPT systems[J]. Proceedings of the CSEE, 2014,34(18):3020-3026.
[9]	杨民生, 王耀南 . 感应耦合电能传输系统动态解谐传输功率控制[J]. 电机与控制学报, 2012,16(1):72-78.
	Yang Minsheng, Wang Yaonan . Transferred power regulating method with a dynamically detuning inductor for ICPT pickups[J]. Electric Machines and Control, 2012,16(1):72-78.
[10]	夏晨阳 . 感应耦合电能传输系统能效特性的分析与优化研究[D]. 重庆大学, 2010.
[11]	王学梅, 张波 . 单相SPWM逆变器的分岔及混沌现象分析[J]. 电工技术学报, 2009,24(1):101-107.
	Wang Xuemei, Zhang Bo . Study of bifurcation and chaos in single-phase SPWM inverter[J]. Transactions of China Electrotechnical Society, 2009,24(1):101-107.
[12]	王春芳, 齐飞 . 单管无线电能传输系统主电路参数的优化设计[J]. 电工电能新技术, 2015,34(5):59-62.
	Wang Chunfang, Qi Fei . Optimal design on main circuit parameters of WPT system with single tube[J]. Advanced Technology of Electrical Engineering and Energy, 2015,34(5):59-62.
[13]	Hatanaka K, Sato F ,Matsuki H, et a1. Power trans-mission of a desk with a cord-free power supply[J]. IEEE Transactions on Magnetics, 2002,38(5):3329-3331.
[14]	王春芳, 陈杰民, 李聃 , 等. 零电压导通、零电压关断单管无线电能传输电源[J]. 电工技术学报, 2015,30(4):203-208.
	Wang Chunfang, Chen Jiemin, Li Dan , et al. A zero-voltage turn-on and turn-off single-switch IPT power supply[J]. Transactions of China Electrotechnical Society, 2015,30(4):203-208.
[15]	刘修泉, 曾昭瑞, 黄平 , 等. 空心线圈电感的计算与实验分析[J]. 工程设计学报, 2008,15(2):149-153.
	Liu Xiuquan, Zeng Zhaorui, Huang Ping , et al. Numerical and experimental analysis on performances of coreless coil inductance[J]. Chinese Journal of Engineering Design, 2008,15(2):149-153.

	f/kHz	L_p/μH	L_s/μH	C_p/nF	C_s/nF
λ = 0.25	200	7.0	1.8	55	310
	500	6.5	1.6	14	66
	800	4.0	1.0	8	40
	1 000	3.0	1.0	5	26
	1 500	2.0	0.5	4	22
λ = 0.2	200	7.0	1.8	57	400
	500	6.5	1.6	9	63
	800	4.0	1.0	3	38
	1 000	3.0	1.0	3	23
	1 500	2.0	0.5	2	22

f/kHz		200	500	800	1 000	1 500
λ = 0.25	h/cm	6.1~6.2	6.1~6.3	6.2~6.3	6.1~6.2	6.4
λ = 0.25	γ	1.61~1.64	1.58~1.61	1.58~1.61	1.61~1.64	1.56
λ = 0.2	h/cm	7.1	7.1~7.2	7.4~7.5	7.4~7.5	7.4~7.5
λ = 0.2	γ	1.4	1.38~1.4	1.33~1.35	1.33~1.35	1.33~1.35