Wireless power transmission to an electromechanical receiver using low-frequency magnetic fields
Wireless power transmission to an electromechanical receiver using low-frequency magnetic fields
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DOI：
10.1088/0964-1726/21/11/115017
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发表时间：
2012-11
影响因子：
4.1
通讯作者：
V. R. Challa;J. O. Mur-Miranda;D. Arnold
中科院分区：
文献类型：
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作者：
V. R. Challa;J. O. Mur-Miranda;D. Arnold
提出了一种近场电动耦合无线电力传输系统，其将电力从发射器线圈输送到紧凑机电接收器。该系统集成了机电能量转换和机械共振，使用低振幅、低频磁场在一定距离范围内提供电力。两个不同的接收器的方向进行了研究，依赖于接收器磁铁上的分离距离范围从2.2到10.2厘米的力或扭矩。每种模式的理论模型比较预测的性能与实验结果。对于提供给直径为100 cm的发射器线圈的7.1 mApk正弦电流，扭矩模式接收器取向在其谐振频率为38.4 Hz时在2.2 cm处具有150 μW的最大功率传输（效率为12%）。对于发送器的相同输入电流，力模式接收器方向在38.9 Hz的谐振频率下在3.1 cm处的最大功率传输为37 μW（效率为4.1%）。
A near-field, electrodynamically coupled wireless power transmission system is presented that delivers electrical power from a transmitter coil to a compact electromechanical receiver. The system integrates electromechanical energy conversion and mechanical resonance to deliver power over a range of distances using low-amplitude, low-frequency magnetic fields. Two different receiver orientations are investigated that rely on either the force or the torque induced on the receiver magnet at separation distances ranging from 2.2 to 10.2 cm. Theoretical models for each mode compare the predicted performance with the experimental results. For a 7.1 mApk sinusoidal current supplied to a transmitter coil with a 100 cm diameter, the torque mode receiver orientation has a maximum power transfer of 150 μW (efficiency of 12%) at 2.2 cm at its resonance frequency of 38.4 Hz. For the same input current to the transmitter, the force mode receiver orientation has a maximum power transfer of 37 μW (efficiency of 4.1%) at 3.1 cm at its resonance frequency of 38.9 Hz.