一种二次自对准的镍微静电马达

QUASI-LIGA PROCESS FOR A FULLY SELF-ALIGNED NICKEL ELECTROSTATIC WOBBLE MICROMOTOR

  • 摘要: 设计出一种微静电wobble马达,定子电极的一部分重叠在转子之上,微马达用二次自对准的准LIGA技术制作,电铸镍作结构层(定子、转子和轴),电铸铜作牺牲层,得到的转子与定子、转子和轴的间隙分别为2.5和1.3μm。马达制备的关键工艺都在低温下完成。在定子和转子间加电压15V,观察到马达转子开始晃动,30~55V时连续转动,转速和减速比随电压和频率变化,对实验结果进行了讨论。

     

    Abstract: The design and fabrication process of fully self-aligned nickel electrostatic wobble micromotors with stators overhanging above rotor are reported. The micromotors were fabricated using quasi-LIGA technology, in which the electroformed nickel was used as a structural material for stator, rotor and bearing, and electroformed copper as a sacrificial and self-aligned layer to obtain small gaps between movable and stationary parts. In addition, all the key fabrication processes were performed at low temperature. The experimentally obtained gap between rotor and stator, rotor and bearing is 2.5 and 1.3 μm, respectively. The experiments show that the micromotors wobble at a bias of 15V, and rotate continuously at bias of 30~55V. It is found that the rotation speed and gear ratio depend on the frequency and voltage of pulse bias.

     

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