稀土永磁同步伺服电动机的控制与参数设计

Control and Parameter Design of the Rare Earth Permanent Magnetic Servo Motor

首先从永磁同步伺服电动机运行状态基本数学模型着手，导出了最大电磁功率Ｐ（ｅｍ）和最大电磁转矩Ｔ（ｅｍ）与电机参数Ｒ，Ｘｄ，Ｘｑ的关系式，通过分析得到了Ｘｑ对Ｘｄ的合理比值范围。据此作者提出了一种不对称转子磁路结构的新型永磁同步电动机，然后借用有限元法分析计算，给出了该机永磁磁场的分布和交、直轴电枢反应电感Ｌ（ａｑ），Ｌ（ａｄ）与转子结构参数相关的曲线。为便于分析和优化设计，最后导出了该机的等效磁路，其计算结果与样机实测数据接近，为永磁同步伺服电动机与伺服放大器相匹配及机电一体化的研究、设计提供了依据。

On the basis of mathematical models of fundamental operating states in the permanent magnetic (PM) synchronous servo motor,this paper derivers formulae of the maximum electromagnetic power P(em) and torque T(em) as a function of the machine parameter: R, Xd,Xq,then the reasonable ratio range of Xd and Xq is obtained. A novel permanent magnetic synchronous motor with an unsymmetrical rotor structure is proposed by the author. With the help of finite element method,the permanent magnetic field in this motor is analyzed and the curves of armature reaction inductance Laq,Lad which depend on the rotor structure parameters are given. In order to simplify analysis and optimum design,the calculated results is verified by the experimental data of the tested equipment. This paper provides a basis for analysis and design of the combination of the PM synchronous servo motor with the driver unit,the key technique of electromechanism.