音圈变形镜具有无磁滞、响应快、调制量大等优点，在大口径光学望远镜中已经替代了传统的压电变形镜。为提高音圈变形镜驱动器的效率，本文研究了影响驱动器电磁力和效率的因素，建立了音圈驱动器的三维模型，并利用有限元分析软件对其磁体充磁方向、磁体尺寸、线圈尺寸和驱动器结构等参数进行了有限元仿真分析和优化。结果表明，本文设计的动磁式音圈驱动器输出力可达0.43 N，电机常数可达0.9,输出力和输入电流有良好的线性关系，为音圈变形设计和应用提供了理论基础。

Voice coil actuator(VCA) has the merits of no hysteresis, fast response and large stroke. It has been used in the secondary mirror of large optical telescopes. To improve its efficiency, a high efficiency moving magnetic voice coil actuator was designed. And a three-dimensional model of VCA has been built and analyzed with finite element analysis software to simulate its magnet magnetizing direction, magnet size, coil size and structure contributed to a more accurate result of the electromagnetic force and efficiency. In order to generate large electromagnetic force and high efficiency, the above parameters are simulated and optimized respectively. The result shows that the output force of the small caliber moving magnetic VCA is up to 0.43 N and the actuator constant is up to 0.9. There is a good linear relationship between the output force and the input current, which provides a theoretical basis for the development of the VCA for next generation deformable mirror.