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浙江大学学报(工学版)
浙江大学学报(工学版)  2022, Vol. 56 Issue (6): 1257-1266    DOI: 10.3785/j.issn.1008-973X.2022.06.025
电气工程     
基于分离补偿网络的IPT系统功率扩容策略
薄强1,2(),王丽芳1,2,3,*(),张玉旺1,3
1. 中国科学院电工研究所，北京 100190
2. 中国科学院大学，北京 100049
3. 中国科学院电力电子与电气驱动重点实验室，北京 100190
Power expansion strategy of IPT system based on separated compensation network
Qiang BO1,2(),Li-fang WANG1,2,3,*(),Yu-wang ZHANG1,3
1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Key Laboratory of Power Electronics and Electric Drives, Chinese Academy of Sciences, Beijing 100190, China
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摘要：

将感应电能传输(IPT)系统的补偿网络分离并加入各并联逆变器中，用以解决功率扩容和环流问题.分析采用单逆变器拓扑和功率扩容拓扑的IPT系统数学模型. 设计各并联逆变器的补偿网络参数，推导功率扩容系统的功率与效率表达式. 分析各并联逆变器在驱动不同步时的环流回路，给出零电压开关(ZVS)控制策略. 搭建1.2 kW 基于分离补偿网络的IPT系统功率扩容装置，进行实验验证. 实验结果表明，各并联逆变器的输出功率比约为1∶2，均实现了ZVS，功率扩容系统直流到直流的整体传输效率为92.53%，环流幅值为0.2 A，证明了所提功率扩容拓扑的实用性和有效性.
关键词： 感应电能传输(IPT);  功率扩容;  零电压开关(ZVS);  驱动不同步;  环流抑制;  补偿网络参数设计    
Abstract:

The compensation network of the inductive power transfer (IPT) system was separated and added to each parallel inverter to solve the power expansion and circulating current problems. Firstly, the mathematical models of the IPT system with single-inverter topology and power expansion topology were analyzed. Secondly, the compensation network parameters of each parallel inverter were designed, and the power and efficiency expressions of the power expansion system were also derived. Then, the circulating current of each parallel inverter was analyzed when the drives were asynchronous, and the zero-voltage-switch (ZVS) control strategy was given. Finally, a 1.2 kW IPT system power expansion device based on the separation compensation network was built for experimental verification. Experimental results showed that the ratio of the output power of each parallel inverter was about 1∶2 and all of them achieve ZVS operation, and the overall transmission efficiency from DC to DC of the power expansion system was 92.53% while the amplitude of the circulating current was 0.2 A, which proved the practicality and effectiveness of the proposed power expansion topology.
Key words: inductive power transfer (IPT)    power expansion    zero-voltage-switch (ZVS)    drive asynchrony    circulating current suppression    parameter design of compensation network
收稿日期: 2021-06-03 出版日期: 2022-06-30
CLC:  TM 72  
基金资助: 国家重点研发计划资助项目(2018YFB0106300)；国家自然科学基金资助项目(51807188)；中国科学院战略性先导科技专项（A类）资助项目(XDA22010403)
通讯作者: 王丽芳     E-mail: boqiang@mail.iee.ac.cn;wlf@mail.iee.ac.cn
作者简介: 薄强（1991—），男，博士生，从事电动汽车无线充电技术研究. orcid.org/0000-0002-7313-4718. E-mail： boqiang@mail.iee.ac.cn
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引用本文:

薄强,王丽芳,张玉旺. 基于分离补偿网络的IPT系统功率扩容策略[J]. 浙江大学学报(工学版), 2022, 56(6): 1257-1266.

Qiang BO,Li-fang WANG,Yu-wang ZHANG. Power expansion strategy of IPT system based on separated compensation network. Journal of ZheJiang University (Engineering Science), 2022, 56(6): 1257-1266.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2022.06.025    或    https://www.zjujournals.com/eng/CN/Y2022/V56/I6/1257

图 1  采用单逆变器的IPT系统原理图
图 2  基于分离补偿网络的IPT系统功率扩容拓扑
图 3  IPT系统功率扩容拓扑的等效电路
图 4  驱动不同步导致的环流
图 5  IPT系统功率扩容拓扑的控制策略
参数 数值 参数 数值
Udc/V 400 Cp1/nF 18.8
Lp1/μH 78.6 Cs/nF 16
Lp2/μH 78.8 L1/μH 236.7
Lp3/μH 41.5 R1/Ω 0.191
Lp4/μH 39.1 L2/μH 224.2
Cp2,1/nF 22.2 R2/Ω 0.259
Cp2,2/nF 43.2 M/μH 32.2
表 1  1.2 kW 基于分离补偿网络的IPT系统功率扩容拓扑参数配置
图 6  基于分离补偿网络的IPT系统功率扩容装置
图 7  考虑延迟角度影响的电压、电流波形
图 8  逆变器的输出阻抗角
图 9  逆变器电流的幅度频谱图
图 10  逆变器电压与电流的实验波形
图 11  逆变器电压与环流的实验波形
图 12  逆变器的电流比与功率比的仿真与实验值
图 13  满载输出功率及DC−DC整体传输效率
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