节点文献
潜油螺杆泵专用稀土永磁同步电动机研究
Research of NdFeB Permanent Magnet Synchronous Submersible Motor for Screw Pump
【作者】 梁丙雪；
【导师】 张炳义；
【作者基本信息】 沈阳工业大学 ， 电机与电器， 2008， 硕士
【摘要】 潜油螺杆泵能有效的处理高粘度及高含砂的原油,而随着原油粘度的增加,潜油螺杆泵必须在低转速下才能有效地工作,其最佳旋转速度一般在100-500r/min。异步潜油螺杆泵电动机的转速较高,不能很好的适应潜油螺杆泵的采油要求。因此,需要研究低转速、大扭矩、高性能的潜油螺杆泵专用稀土永磁同步电动机。潜油螺杆泵专用稀土永磁同步电动机是一种立式工作的三相永磁电动机,它采用定转子分段的细长结构,各定子段之间轴向用非磁性材料连接,各转子段之间有扶正轴承,定转子之间充满专用润滑油,转子上则镶嵌有稀土永磁体。本文根据潜油螺杆泵专用稀土永磁同步电动机的特殊结构,研究了其定转子分段、内充润滑油的特点对电机设计及性能的影响。经过分析,电机采用36槽10极结构,定子绕组采用了分数槽绕组;由于此种电机的主要尺寸比范围较大,定子内径不易确定,本文给出了简单可行的确定电机定子内径的方法。分析了温度对潜油螺杆泵专用稀土永磁同步电动机的性能影响;通过研究分析得出潜油螺杆泵专用稀土永磁同步电动机的端部漏抗随转子段数增加的变化规律,并得到计算公式;给出了潜油螺杆泵专用稀土永磁同步电动机机械损耗的简便计算方法;文章给出了永磁体的选择方法和永磁体的放置方式。利用Matlab编制了潜油螺杆泵专用稀土永磁同步电动机的电磁计算程序,得出样机的性能参数;利用Ansofl对样机进行了仿真,得出了气隙磁密、反电势等波形,并仿真得出了隔磁桥宽度对电机性能的影响。实验证明样机的性能良好,比原来的异步潜油螺杆泵电机的效率提高了12.4个百分点;最大转矩倍数由原来异步潜油螺杆泵电动机的1.67提高到2.42。通过对比潜油螺杆泵专用稀土永磁同步电动机实验所得数据和应用Matlab程序设计计算结果,证明了程序的正确可行、简单方便。本文的研究工作对于进一步完善和发展永磁同步电动机的设计方法和设计理论具有重要意义。
【Abstract】 The screw pump is one of the valid equipments to exploit crude oil which has high viscosity and contains a lot of sand. The screw pump can only work effectively at low speed and its best rotational speed is around 100-500r/min normally. The existing submersible motors can not be applied to screw pumps directly because of its high rotational speed. Therefore, the development of low-speed and high-torque permanent magnet synchronous submersible motor (PMSSM) for screw pump has become one of the currently significant tasks.PMSSM for screw pump is a vertical three-phase induction motor. It adopts lathy structure of subsection of stator and rotor: each subsection of stator combines with non-magnetic substance and each subsection of rotor combines with rotor bearing. There is full of appropriative lubricating oil between stator and rotor. And there are permanent magnets in the PMSSM rotor.This paper researches on the influence of PMSSM characteristic which is subsection of stator and rotor and filled with the lubricant upon motor performances according to its special structure. The prototype has ten poles and thirty-six stator slots and adopts fractional winding slot. Stator inner diameter dimension of the motor is difficult to define because the range of slenderness ratio is very large. A new method is adopted to calculate stator inner diameter dimension in this paper. And how temperature influences the performance of the motor is presented. Through analysis, how to calculate the motor end leakage is obtained. Simple method of mechanical loss is gained by traditional experiential calculation formula. In this paper, how to select and arrange permanent magnets are discussed. Moreover, The MATLAB is used to program and design the prototype. And, the computer simulation results, such as wave shape of air-gap magnetic field and wave shape of no-load back electromotive force are shown by ANSOFT according to its model. Besides, the isolated magnetic bridge width influences on the motor performance parameters are given. Experiment data approves that the prototype has high performance. The prototype efficiency is higher 12.4% than induction submersible motor’s for screw pump. And, the maximum torque multiple of the prototype increases to 2.42 from 1.67 of original induction motor. Contrasting experiment data and design calculation results show that the method and program developed in this paper are correct and feasible convenient in use as well. The research work in this paper is very important to improve the design method of permanent magnet synchronous motor.