单相永磁力矩马达的力矩转角特性
Torque-angle Characteristics of Permanent Magnet Torque Motor with Single-phase Excitation

现有的2D阀用电-机械转换器从磁路原理和结构而言均较为复杂，本文设计了一种单相励磁的轴向不对称磁路，并根据该磁路提出了一种新型的单相永磁力矩马达。首先通过磁路解析法推导了马达的力矩转角特性方程，随后建立有限元模型分析了该马达的磁场分布和力矩转角特性。基于数值模拟结果加工了样机，建立了测试台架对其作了力矩转角特性的测试。测试结果与模拟结果较为符合，表明该马达的电磁力矩较大，其力矩-转角特性曲线呈上升的线性关系，力矩幅值随励磁电流而增加，适合作为2D三通阀及其他类似元件的电-机械转换器。
In order to solve the problem that conventional electro-mechanical converter of 2D valve had deficiency of complicated magnetic circuit and structure, a single-phase excited magnetic circuit with axial asymmetrical topology is proposed, and based on that a novel permanent magnet torque motor is developed. Firstly the equation of torque-angle characteristics is derived via analytical method, then a finite element analysis model is built to describe magnetic field distribution, and therefore numerical results of torque-angle characteristics are obtained. Prototype motor is designed and fabricated based on numerical simulation. The experimental rig is built up to study torque-angle characteristics. The experimental results agreed well with simulations, which indicates prototype motor has large magnetic torque and its torque-angle characteristic is close to linear relationship whose amplitude increases with excited current. The proposed motor is appropriate to be electro-mechanical converter of 2D three-way valve and other similar control components