【作者】 李成军；

【导师】 蓝益鹏；

【作者基本信息】 沈阳工业大学 ， 电力电子与电力传动， 2011， 硕士

【摘要】 直线永磁交流伺服系统省掉了机械传动机构,以零传动方式,消除了机械变换机构所带来的一些不良影响,极大地提高了进给系统的快速反应能力和精度,直线驱动技术在数控机床领域中得到了广泛的应用。然而,由于动子与静止导轨之间的摩擦,特别是在低速时的非线性摩擦以及由摩擦引起的热变形,降低了直线伺服系统的性能及其加工精度。因此,如何有效的减小或消除摩擦引起了普遍的关注。在此提出一种新型直接磁悬浮永磁直线同步电动机的结构,以消除动子与导轨之间的摩擦。论文的主要研究内容如下：(1)针对数控机床无摩擦进给的要求,提出一种动子双绕组结构的磁悬浮永磁直线同步电机。该电动机的动子上有两套绕组,一套为推力绕组,用于产生电磁推力,另一套为悬浮绕组,用于产生可控的磁悬浮力。(2)建立磁悬浮永磁直线同步电动机的数学模型,对其控制策略进行分析研究。采用Maxwell应力张量法推导电机的电磁力模型；在i1d=0、i2q=0的控制策略下,用Ansoft对不同永磁材料电动机的电磁推力和磁悬浮力进行有限元计算分析。(3)设计电机的电枢绕组结构型式与次级结构,并研究气隙长度对悬浮力与推力的影响,选择合适的气隙长度,使电机能够产生足够大的气隙磁场来满足推力与悬浮力的要求,以及保证动子上产生均匀的可控悬浮力来实现电机稳定悬浮和满足高性能运行要求。(4)磁悬浮永磁直线同步电动机的Matlab电磁计算程序设计。根据国家自然科学基金课题的研究要求,设计一台磁悬浮永磁直线同步电动机研究样机,并对其进行电磁计算。更多还原

【Abstract】 Permanent magnet linear servo system cuts the mechanical transmission institutions and eliminates some adverse effects caused by the mechanical commutation institutions. This linear drive technology of permanent magnet linear synchronous motor has been widely used in the field of CNC machine, which greatly improves rapid response capability and motion precision of the feeding system. However, the friction between the mover and the static guide causes thermal deformation, especially in the low speed and nonlinear, which reduces the linear servo properties and processing precision. Therefore, how to effectively reduce or eliminate the friction caused widespread concern. This dissertation proposes a new direct maglev structure of permanent magnet linear synchronous motor to eliminate the friction between the mover and the static guide. The major research content of dissertation as follows:(1) Aim at NC machine tools friction-free feeding requirements, the dissertation proposes a kind of double windings structure of magnetic levitation permanent magnet linear synchronous motor. One is the thrust winding, which is used to generate electromagnetic thrust, the other is the levitation winding, which is used to generate magnetic levitation force.(2) The control strategy is analyzed through the establishment of motor mathematical model. The mathematical model of the motor electromagnetic thrust and levitation force will be derived by the Maxwell stress tensor method. In the control strategy of i1d=0、i2q=0, Ansoft is used for making finite element analysis of the motor electromagnetic thrust and levitation force, which permanent magnetic materials are different.(3) Designing the motor armature winding structural type and secondary structure, and researching the influence of the air gap height on levitation force and thrust. By choosing the appropriate air gap height, this motor can generate enough air-gap magnetic field to satisfy the requirements of thrust and levitation force, and levitation force of mover is uniform, which meets the high performance requirements of motor.(4) A Matlab electromagnetic calculation program is designed for a magnetic levitation permanent magnet linear synchronous motor. According to the national natural science fund projects research requirement, a magnetic levitation permanent magnet linear synchronous motor is designed, and finished its electromagnetic computing.更多还原