Analysis of Parallel Output Characteristics of Dynamic IPT System and Design Method of Current Sharing Parameters

doi:10.11985/2023.02.007

Abstract

Abstract:

The dynamic induction power transfer(IPT) system, with multiple pickup modules parallel output, improves the power transmission capability of the system and is suitable for long rail transmission structures. It has broad application prospects in high-power applications. However, due to the sight differences in parameters between the pickup modules and the dynamic operation of the modules, there may be imbalanced current distribution of the pickup modules in the actual application, which even causes overcurrent damage to the pickup modules. Starting from the mathematical model of LCC-S, the output volt-ampere characteristics and load distribution characteristics of the pickup module are derived, the influence of pickup parameters on current distribution under different compensation states is analyzed, and a secondary side detuning compensation scheme is proposed. A parameter design method for the detuning coefficient is provided, utilizing the adjustment of the secondary side parameters to achieve approximate current sharing control for each module. Finally, an experimental prototype with three pickup modules output in parallel is built. After applying the proposed detuning compensation method, the maximum current ratio between modules is reduced from 13.02 to 1.3. The test results are consistent with theoretical analysis, proving the correctness and effectiveness of the scheme.

Key words: Inductive power transfer, parallel pickup modules, parameter design, current sharing strategy

CLC Number:

TM461

ZHU Xingyu, CHEN Qianhong, ZHANG Bin, LIU Lidong. Analysis of Parallel Output Characteristics of Dynamic IPT System and Design Method of Current Sharing Parameters[J]. Journal of Electrical Engineering, 2023, 18(2): 70-77.

Figures/Tables 16

References 20

[1]	COVIC G A, BOYS J T. Inductive power transfer[J]. Proceedings of the IEEE, 2013, 101(6):1276-1289. doi: 10.1109/JPROC.2013.2244536
[2]	BOYS J T, COVIC G A. The inductive power transfer story at the University of Auckland[J]. IEEE Circuits and Systems Magazine, 2015, 15(2):6-27.
[3]	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.
[4]	ELLIOTT G A J, COVIC G A, KACPRZAK D, et al. A new concept:Asymmetrical pick-ups for inductively coupled power transfer monorail systems[J]. IEEE Transactions on Magnetics, 2006, 42(10):3389-3391. doi: 10.1109/TMAG.2006.879619
[5]	ZAHEER A, COVIC G A, KACPRZAK D. A bipolar pad in a 10-kHz 300-W distributed IPT system for AGV applications[J]. IEEE Transactions on Industrial Electronics, 2014, 61(7):3288-3301. doi: 10.1109/TIE.2013.2281167
[6]	KIM J H, LEE B, LEE J, et al. Development of 1-MW inductive power transfer system for a high-speed train[J]. IEEE Transactions on Industrial Electronics, 2015, 62(10):6242-6250. doi: 10.1109/TIE.2015.2417122
[7]	MI C C, BUJA G, CHOI S Y, et al. Modern advances in wireless power transfer systems for roadway powered electric vehicles[J]. IEEE Transactions on Industrial Electronics, 2016, 63(10):6533-6545. doi: 10.1109/TIE.2016.2574993
[8]	BUDHIA M, COVIC G A, BOYS J T. Design and optimization of circular magnetic structures for lumped inductive power transfer systems[J]. IEEE Transactions on Power Electronics, 2011, 26(11):3096-3108. doi: 10.1109/TPEL.2011.2143730
[9]	BUDHIA M, BOYS J T, COVIC G A, et al. Development of a single-sided flux magnetic coupler for electric vehicle IPT charging systems[J]. IEEE Transactions on Industrial Electronics, 2013, 60(1):318-328. doi: 10.1109/TIE.2011.2179274
[10]	COVIC G A, BOYS J T, KISSIN M L G, et al. A three-phase inductive power transfer system for roadway-powered vehicles[J]. IEEE Transactions on Industrial Electronics, 2007, 54(6):3370-3378. doi: 10.1109/TIE.2007.904025
[11]	朱春波, 姜金海, 宋凯, 等. 电动汽车动态无线充电关键技术研究进展[J]. 电力系统自动化, 2017, 41(2):60-65,72.
	ZHU Chunbo, JIANG Jinhai, SONG Kai, et al. Research progress of key technologies for dynamic wireless charging of electric vehicle[J]. Automation of Electric Power Systems, 2017, 41(2):60-65,72.
[12]	KISSIN M L G, BOYS J T, COVIC G A. Interphase mutual inductance in polyphase inductive power transfer systems[J]. IEEE Transactions on Industrial Electronics, 2009, 56(7):2393-2400. doi: 10.1109/TIE.2009.2020076
[13]	ELLIOTT G, RAABE S, COVIC G A, et al. Multiphase pickups for large lateral tolerance contactless power-transfer systems[J]. IEEE Transactions on Industrial Electronics, 2010, 57(5):1590-1598. doi: 10.1109/TIE.2009.2031184
[14]	RAABE S, COVIC G A. Practical design considerations for contactless power transfer quadrature pick-ups[J]. IEEE Transactions on Industrial Electronics, 2013, 60(1):400-409. doi: 10.1109/TIE.2011.2165461
[15]	COSTA V S, MARQUES E, MENDES A P, et al. Magnetic couplers for dynamic IPT systems[C]// 2019 IEEE Vehicle Power and Propulsion Conference (VPPC),2019.
[16]	麦瑞坤, 马林森. 基于双拾取线圈的感应电能传输系统研究[J]. 中国电机工程学报, 2016, 36(19):5192-5199.
	MAI Ruikun, MA Linsen. Research on inductive power transfer systems with dual pick-up coils[J]. Proceedings of the CSEE, 2016, 36(19):5192-5199.
[17]	司马昆, 吴松荣, 张欣, 等. LCL型感应耦合电能传输并联系统研究[J]. 电工电能新技术, 2016, 35(4):6-11.
	SIMA Kun, WU Songrong, ZHANG Xin, et al. Research on parallel system of inductively coupled power transfer based on LCL compensation[J]. Advanced Technology of Electrical Engineering and Energy, 2016, 35(4): 6-11.
[18]	范满义, 史黎明, 殷正刚, 等. 感应电能传输系统中多拾取线圈互感补偿方法及输出功率平衡策略[J]. 电工技术学报, 2018, 33(17):3998-4006.
	FAN Manyi, SHI Liming, YIN Zhenggang, et al. A method of multiple pickups coil mutual inductance compensation and output power balance in induction power transfer system[J]. Transactions of China Electrotechnical Society, 2018, 33(17):3998-4006.
[19]	张发聪, 史黎明, 殷正刚, 等. 一种感应耦合电能传输系统接收模块并联电流控制策略[J]. 中国电机工程学报, 2018, 38(20):6091-6098.
	ZHANG Facong, SHI Liming, YIN Zhenggang, et al. A novel current control strategy of parallel pickup modules in inductively coupled power transfer systems[J]. Proceedings of the CSEE, 2018, 38(20):6091-6098.
[20]	ZHANG F, SHI L, YIN Z, et al. A current balance control strategy applied in inductively coupled power transfer system with multiple parallel pickup modules[J]. IEEE Transactions on Vehicular Technology, 2019, 68(3):2207-2217. doi: 10.1109/TVT.2019.2894828

参数	数值
原边发射电流I_p/A	30
工作频率f/kHz	85
标准互感M₀/μH	2.5
标准拾取线圈自感L_s0/μH	25
标准拾取线圈内阻R_s0/mΩ	25

编号	互感M_i/μH	自感L_s_i/μH	内阻R_s_i/mΩ
模块1	2.47	24.86	25.5
模块2	2.60	25.57	28.0
模块3	2.20	22.96	27.6