新型圆筒直线电机推力的解析与数值方法研究

Push force analysis of a cylinder linear motor

提出了一种新型圆筒直线电机结构。建立了适合其结构特征的轴对称涡流解析方程,给出了方程的解析解。并采用变分方法建立了该轴对称场的有限元模型。数值分析结果表明:两种方法的计算结果一致,验证了解析模型的正确性和可行性。基于分析结果,经选取合适的电机参数,制作了样机,并测试了该电机启动推力变化情况。实验结果和计算结果相符,表明解析模型满足了新型圆筒直线电机的计算要求,同时也验证该方法的可靠性。结果还表明该电机满足了动感雕塑隐蔽驱动的要求。进一步还研究了电机气隙大小、次级厚度等主要结构参数对电机推力等性能的影响,结果显示:气隙增大,推力减小;次级厚度为10mm时,推力为198.51N,达到最大。

The structure of a cylinder linear motor is presented. And the axial symmetric vortex analytical equation, which fits for its structure characters, is established and the solution is given. This axial symmetric FEM model is set up with the variation theory. Simulation results reveal that these two methods are consistent, and the analytical model is effective and efficient. Moreover, based on the analysis, a cylinder linear motor model was manufactured with appropriate structure parameters, and the change of the start pushing force measured. The test results and the calculations have the same tendency and approximate value. It proves that the analytical model meets the calculation of the cylinder linear motor. Therefore, it verifies the reliability of this method. Furthermore, the above research reveals that the cylinder linear motor meets the demand of driving the mobile sculpture shadily. The main structure parameters, such as the air gap, the thickness of the secondary end and those may affect the performances of the linear motor were also investigated. It is found that when the air gap increases, the pushing force decreases. When the thickness of the secondary is 10 mm, the pushing force reaches its maximal value of 198.5 N.