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首页> 外文期刊>Magnetics, IEEE Transactions on >Planar Variable Inductor Controlled by Ferrofluid Actuation
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Planar Variable Inductor Controlled by Ferrofluid Actuation

机译：铁磁流体致动控制的平面可变电感器

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摘要

This paper reports a micropatterned variable inductor that utilizes ferrofluid as the movable magnetic core. Ferrofluid is displaced over the planar inductor using the magnetic field provided by another “actuation” coil aligned to the inductor, varying permeability distribution on the inductor to control its inductance. Superimposing a bias field on the varying magnetic field uniquely enables repelling of the fluid from the inductor, as well as switching between repelling and attracting motions simply by changing the direction of the driving current to the actuation coil. Microfabricated devices are tested to reveal that the repelling-mode operation provides 6.1$, times ,$ larger inductive changes than those available with the attracting mode. The continuous modulation of inductance is demonstrated with a tuning range of 16% using input currents up to 1.2 A. Frequency tuning using a resonant tank formed with the device is also demonstrated to show a 76-ppm/mA frequency sensitivity to the input current.
机译：本文报道了一种微模式可变电感器，该电感器利用铁磁流体作为可移动磁芯。利用与感应器对齐的另一个“激励”线圈提供的磁场，铁磁流体在平面感应器上移动，从而改变感应器上的磁导率分布以控制其电感。只需在变化的磁场上叠加一个偏置磁场，就可以使来自感应器的流体相互排斥，并且只需更改驱动电流流向致动线圈的方向即可在排斥和吸引运动之间进行切换。测试了微型设备，发现排斥模式操作提供了6.1 $，倍，$ 较大的归纳变化。吸引模式。演示了使用高达1.2 A的输入电流在16％的调谐范围内实现电感的连续调制。还证明了使用由该器件形成的谐振储能器进行的频率调谐对输入电流表现出76-ppm / mA的频率灵敏度。

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