潜油螺杆泵直驱永磁同步电机的设计与温度场分析

发布时间：2018-02-26 11:09

  本文关键词： 潜油电机 电机设计 MATLAB电磁计算程序 电磁场有限元仿真 温度场仿真　出处：《沈阳工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国石油开采的进行,潜油螺杆泵采油系统应用越来越多。潜油螺杆泵采油系统在开采稠油,高含气油,高含沙油等油井时具有其他采油设备无可比拟的优势。潜油电机作为潜油螺杆泵采油系统的动力装置,对潜油螺杆泵的高效稳定运行至关重要。传统潜油电机一般转速较高,需要加减速器才能来驱动潜油螺杆泵工作,这就降低了采油系统的效率和稳定性。针对这种情况,研究开发低转速的潜油电机就非常有必要。本文首先介绍了潜油螺杆泵驱动电机的结构特点,提出设计一台16极潜油永磁同步电机样机。根据电机的设计要求,初步确定了电机的主要尺寸,定子槽数,槽型大小,绕组排列和永磁体尺寸大小;针对切向式励磁方式的漏磁情况,设计了空气隔磁结构;为减小电机齿槽转矩,设计了不均匀气隙磁路结构。为验证所设计电机的工作性能,基于解析法用MATLAB语言编写了电机的电磁计算程序,并对空载漏磁系数的计算进行了详细分析,选出了合适的隔磁桥宽度。作为对比,又利用Maxwell仿真软件,对电机的空载和负载时的电磁场进行了仿真分析。空载时,对比分析了均匀气隙结构和不均匀气隙结构时电机的空载反电动势,空载气隙磁密和齿槽转矩,并选出了合适的不均匀气隙的尺寸设计。负载时,分析了所设计电机在不同负载下的各项工作性能。针对潜油电机工作环境密闭,散热困难的问题,本文对所设计的电机进行了温度场有限元仿真分析。对90℃油井温度时电机的各部分损耗进行了计算,通过流体力学知识确定了电机稳态运行时各表面的等效散热系数,建立了一个齿距范围的三维仿真模型,对电机的温度场进行了仿真计算。通过以上仿真计算,证明了所设计电机的合理性,能够适应潜油螺杆泵电机的工作环境要求。
[Abstract]:With the development of oil production in China, the application of submersible screw pump system is more and more. The oil recovery system of submersible screw pump is producing heavy oil with high gas content. Oil wells with high sand content have unparalleled advantages over other oil recovery equipment. As a power device of oil recovery system of submersible screw pump, submersible motor is very important to the efficient and stable operation of submersible screw pump. A reducer is needed to drive the submersible screw pump, which reduces the efficiency and stability of the oil recovery system. It is necessary to study and develop submersible motor with low rotational speed. This paper first introduces the structural characteristics of submersible screw pump driven motor, and puts forward the design of a 16-pole submersible permanent magnet synchronous motor prototype. The main dimensions of the motor, stator slot number, slot size, winding arrangement and permanent magnet size are preliminarily determined. The air magnetic insulation structure is designed for the tangential excitation mode. The non-uniform air-gap magnetic circuit is designed. In order to verify the working performance of the designed motor, the electromagnetic calculation program of the motor is compiled with MATLAB language based on analytic method, and the calculation of no-load flux leakage coefficient is analyzed in detail. The suitable width of magnetic isolation bridge is selected. By using Maxwell simulation software, the electromagnetic field of the motor under no load and load is simulated and analyzed. In this paper, the no-load back EMF, air-gap magnetic density and slot torque of the motor with uniform air gap structure and non-uniform air gap structure are compared and analyzed, and the appropriate size design of non-uniform air gap is selected. The working performance of the designed motor under different loads is analyzed. Aiming at the problem that the working environment of the submersible motor is closed and the heat dissipation is difficult, In this paper, the temperature field of the motor is simulated by finite element method. The loss of every part of the motor is calculated at 90 鈩，

本文编号：1537764