基于抗磁悬浮热解石墨的光驱转动结构设计与研究
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中图分类号：TN201文献标志码：A
Design and research on optical drive rotating structure of antimagnetic levitation pyrolytic graphite
YU Mingxin，CAO Mingrui，LI Jianlang （School of Optical-Electrical and Computer Engineering， University of Shanghai for Science and Technology，Shanghai200o93，China）
Abstract： The optical drive movement of anti-magnetic levitation pyrolytic graphite is of great significance to the optical manipulation of objects and the acquisition of optical energy. At present， the existing rotating system of optical drive based on pyrolytic graphite has the problems of low rotating speed and low energy conversion efficiency. Therefore， it is proposed to adjust the magnetic field around the magnetic levitation pyrolytic graphite to directionally enhance its rotation. Specifically， a magnetic levitation base structure with circular magnetic field defects was designed to improve the rotation speed of pyrolytic graphite under irradiation. Firstly， based on the magnetic field theory and heat conduction theory， a numerical analysis model was established， and the realization mechanism and motion law of the magnetic levitation pyrolytic graphite optical drive were explained. Then the optical driving effect of the designed magnetic levitation structure was verified by experiments. The results showed that the maximum rotation speed of pyrolytic graphite was 3.5r/s driven by semiconductor laser with wavelength of 808nm and power of 200mW Compared with the original structure， in the power range of 20 to 200mW ，drivenby the laserwith the same optical power， the rotating speed of the pyrolytic graphite was increased by 1 to 2 times. It had better stability and lower rotation threshold power. The research results provide reference for the design of optical drive rotating devices and new optical energy collection systems.
Keywords： anti-magnetic levitation; optical drive rotation; pyrolytic graphite; permanent magnet
引言
磁悬浮技术具有无摩擦特性，能减少物体间的接触磨损，被广泛应用于高速旋转机械与轨道交通设备（如轴承、电机、列车等）[1-3]。（剩余10180字）