1.宁波市永能电力产业投资有限公司;2.国网浙江省电力有限公司宁波有限公司
国网浙江省电力有限公司科学技术项目(KJXM2022034)
1.Ningbo Yongneng Electric Power Industry Investment Co., Ltd.;2.State Grid Zhejiang Electric Power Co., Ltd. Ningbo Co., Ltd.
Science and Technology Project of State Grid Zhejiang Electric Power Co., LTD(KJXM2022034)
无线电能传输（wireless power transfer, WPT）系统在电动汽车应用中不可避免出现原副边线圈相对位置错位，这会导致系统输出功率降低。为解决这一问题，本文提出在双边LCC补偿的WPT系统发射侧引入中继线圈，构成新型LCC-S-LCC三线圈WPT系统。通过降低中继线圈与接收线圈间互感对横向偏移距离的敏感度，从而降低输出功率的波动。最后，搭建了样机进行验证，结果表明在横向偏移距离为线圈尺寸30%的范围内，新型LCC-S-LCC三线圈WPT系统输出功率波动仅5.5%。
In the application of wireless power transfer(WPT) system in the field of electric vehicles, the misalignment of the primary and secondary coils is inevitable, which causes the output power to decrease. In order to the problem, this paper proposed to add a relay coil to the transmission side of double-sided LCC compensated wireless power transfer(WPT) system, thus forming a novel LCC-S-LCC three coil WPT system. Reduce the fluctuation of output power by reducing the sensitivity of mutual inductance between the relay coil and the receive coil to transverse offset distance. Finally, a prototype was built for experimental verification, and the results showed that within the range of transverse offset distances of 30% of the coil size, the output power fluctuation of the novel LCC-S-LCC three coil WPT system was only 5.5%.
