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计及谐波和死区影响的IPT系统时域建模与软开关特性分析
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强电磁工程与新技术国家重点实验室(华中科技大学), 湖北省武汉市 430074

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国家重点研发计划资助项目(2018YFB0106300)


Time-domain Modeling and Soft-switching Characteristic Analysis of Inductive Power Transfer System Considering Influence of Harmonics and Dead Time
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State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China

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    摘要:

    LCC-S补偿感应电能传输(IPT)系统的原边逆变桥输出电流包含丰富的谐波分量,采用传统的基波分析法进行分析会带来较大的误差。针对该问题,文中考虑谐波和死区的影响,将谐波含量少的线圈支路用基波模型近似表示,保留富含谐波的输入脉冲激励电压,在基波模型基础上建立简化的时域分析模型。基于该时域模型,对系统参数进行优化,实现开关管的零电压开关(ZVS)。最后,搭建了1 kW实验样机,实验结果验证了所提模型的准确性,系统在宽工作范围内实现了ZVS软开关,当输出功率100 W以上时系统效率均高于90%,且最高效率达到95.6%。

    Abstract:

    The output current of inverter bridge on the primary side contains a lot of harmonics in LCC-S compensated inductive power transfer(IPT)systems. Analysis based on fundamental harmonic approximation(FHA)method will bring non-negligible errors. To solve this problem, harmonics and dead time are taken into consideration. The coil branch which contains negligible harmonics is modeled with FHA method, and the input pulse voltage with much harmonics is reserved. Then the simplified time-domain model is developed based on the FHA model. Based on the model, the system parameters are optimized for zero voltage switching(ZVS)operation of power switches. Finally, a 1 kW prototype is built to validate the accuracy of the proposed model. The system achieves ZVS within a wide operation range and has a system efficiency greater than 90% when the transferred power is above 100 W. The maximum system efficiency is up to 95. 6% at full load.

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张晓明,蔡涛,胡宏晟,等.计及谐波和死区影响的IPT系统时域建模与软开关特性分析[J].电力系统自动化,2019,43(17):140-146. DOI:10.7500/AEPS20190109005.
ZHANG Xiaoming, CAI Tao, HU Hongsheng,et al.Time-domain Modeling and Soft-switching Characteristic Analysis of Inductive Power Transfer System Considering Influence of Harmonics and Dead Time[J].Automation of Electric Power Systems,2019,43(17):140-146. DOI:10.7500/AEPS20190109005.

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  • 收稿日期:2019-01-09
  • 最后修改日期:2019-07-16
  • 录用日期:2019-03-28
  • 在线发布日期: 2019-06-11
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