| 程靖宜,武小兰,白志峰.基于耦合系数估计的电动汽车无线电能传输最大效率跟踪[J].电子测量与仪器学报,2020,34(3):180-186 |
| 基于耦合系数估计的电动汽车无线电能传输最大效率跟踪 |
| Maximum efficiency tracking of wireless power transfer for electricvehicles based on coupling coefficient estimation |
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| DOI： |
| 中文关键词: 电动汽车 无线电能传输 耦合系数估计 最大效率跟踪 |
| 英文关键词:electric vehicle wireless power transfer coupling coefficient estimation maximum efficiency tracking |
| 基金项目:国家自然科学基金(51405367)、汽车运输安全保障技术交通行业重点实验室（长安大学）开放基金项目（300102229509）、陕省教育厅专项科研计划项目（19JK0467） 资助 |
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| 中文摘要: |
| 电动汽车行驶(EV)过程中可通过无线电能传输(WPT)提高续驶里程，而车辆轴荷的改变或者路面状况引起的悬架振动会改变发射线圈和接收线圈之间的耦合系数，导致WPT系统远离最大效率传输点。为了解决WPT系统效率随着耦合系数的波动而偏离极值点的问题，以串串(SS)型拓扑为研究对象推导出耦合系数实时估计方程，在此基础上提出了一种新的最大效率跟踪控制方法，利用PI控制调节接收侧直流电流，从而使得WPT系统在耦合系数变化时也可以维持最大效率状态。仿真和实验结果表明了该方法的有效性。 |
| 英文摘要: |
| While electric vehicles (EV) can improve driving range through wireless power transfer (WPT), changes in vehicle axle load or suspension vibration caused by road conditions can change the coupling coefficient between transmitter coil and receiver coil, leading to WPT system being far away from the maximum efficiency transmission point. To address the problem that WPT system efficiency deviates from the extreme point along with the fluctuation of coupling coefficient, a real time estimation method of coupling coefficient for series series (SS) topology is proposed, on this basis, a novel maximum efficiency tracking control scheme is proposed, which is regulating the DC link current of secondary side by PI feedback controller to maintain the highest efficiency of WPT system when coupling coefficient varies. Simulation and experimental results indicate the effectiveness of the proposed method. |
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