Research on Levitation and Driven Characteristics of Diamagnetic Levitation Electrostatic Motor

doi:10.3901/JME.2022.19.104

Abstract

Abstract: For the micro motor, the friction problem is becoming seriously with the scale reduction. The diamagnetic levitation technology possesses the merits such as frictionless, passive self-stabilization and increase buoyancy-weight ratio under scale effect, which is an effective way to solve the friction problem. A micro motor with a 10 mm diameter rotor based on diamagnetic levitation and electrostatic driven principles is developed. Based on the current equivalent model of permanent magnet, the expression of magnetic flux density is deduced, the mathematical model of diamagnetic levitation force is established. The relationship between levitation force and levitation height is obtained and verified by experiments. Based on the principle of capacitance electrostatic energy, the mathematical model of electrostatic motor driven torque is established. The relationship between electrostatic driven force, stator input voltage and suspension height are obtained and verified. Based on the rotation experiment, the influence of input voltage and environmental humidity on rotation speed are analysed, and the electrostatic motor driven characteristics are obtained. This research can provide a foundation for developing high-performance micro diamagnetic levitation electrostatic driven motor.

Key words: diamagnetic levitation, electrostatic motor, driven characteristic, modeling, humidity

CLC Number:

TH16

XU Yuanping, LING Riwang, ZHOU Jin, JIN Chaowu. Research on Levitation and Driven Characteristics of Diamagnetic Levitation Electrostatic Motor[J]. Journal of Mechanical Engineering, 2022, 58(19): 104-114.

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