基于Halbach阵列宏微复合驱动器的输出力优化研究

Output Force Optimization Analysis of the Macro-micro Composite Actuator Based on Halbach Array

为提升宏微复合驱动器的输出力以及改善输出力波动,采用将永磁体进行Halbach阵列方式布置,并通过添加辅助磁轭来改变宏动线圈与永磁体的相对位置两种方法结合的方案。为验证优化方案的有效性,采用有限元电磁场仿真,分析宏微复合驱动器优化前后的输出力变化,并以提高输出力和降低输出力波动为目标,得出了Halbach阵列的永磁体最佳尺寸。最后搭建实验平台验证了优化方案的合理性。结果表明:优化方案使宏微复合驱动器在电流大小为4 A时,输出力达到95 N左右,输出力波动减小为23 N左右,验证了优化方案的合理性。

To improve the output force and output force fluctuation of the macro-macro composite actuator,a combination of the Halbach array arrangement of permanent magnets and the addition of an auxiliary yoke to change the relative position of the macro-motion coil to the permanent magnets was used.To verify the effectiveness of the optimization scheme,finite element electromagnetic field simulations were used to analyze the change in output force before and after the optimization of the macro-micro composite actuator,and the optimum size of the permanent magnets for the Halbach array was gotten to increase the output force and reduce the output force fluctuation.Finally,the experimental platform was built to verify the rationality of the optimization scheme.The results show that the optimized solution not only enables the macro-micro composite actuator to achieve an output force of around 95 N at 4 A current levels,but also reduces the output force fluctuations to around 23 N.The rationality of the optimization scheme is verified.