| Electric submersible pump as a kind of most advanced mechanicalequipment of oil production, have been widely used for some years, andbeing perfected and developing. Electric motor is heart of the submersiblepumping unit. When electric motor is running, there is one circumrotatoryelectromagnetic field in inner space. Electromagnetic field distribution andvariability in variety medium decided running form and behavior. As a result,studies in electromagnetic field distribution play part in the analysis anddesign of electric motor, which has a long-standing significance to the inlandoil field development.Electromagnetic field of electric motor is kind of electromagnetic fieldof engineering field. Rationale of electromagnetic field is Maxwell system ofequations. All problems of electromagnetic field equal to beginning problemand boundary problem of partial differential equation.Electromagnetic field of electric motor include of the type is a lot of, ifpress a source whether the variety can is divided into Static Magnetic andHarmonic Magnetic;Press the medium line of solving the district or not can isdivided into line, nonlinear problem;By the electromagnetism field bit functionof the dimension number can is divided into one dimension, 2-D, 3-D problem.According to the theories, using the numerical analysis can resolve anabove-mentioned problem. In reality, electric motor designer hardly everadopts finite element Method or other numerical analysis methods on basic2-D Static Magnetic problem. For the reason, first, the objective conditionlimits;besides which, subjective still have both side up: One if electric motordesigner wants to solve Electromagnetic field problem of electric motor withfinite element method or other numerical analysis methods, he must be greaton theories and process and computer language and data structure,sometimes still need to do the program modification etc.;two, because thedata preprocessor is monotonous and quantity, it is 80% of whole finiteelement analysis workload. Therefore, it is very important that the study ofengineering application on electromagnetic field of electric motor numericalcomputation. Its target is that Depart from electric motor designer, how tomake that numerical methods such as finite element method change intogeneral on progress, simpleness on operating, automation on datamanagement. Let finite element Method become electric motor designercurrent tool for solution electromagnetic field question.Because finite element theories is more complete, calculation methodand software by way of analyze calculating tool has been applied in theengineering realm. The electric motor designer more concerns how to apply afinite element Method to analyze the electromagnetic field of electric motor,namely finite element Method preprocessor and post-processing.1, finite element Method preprocessor: Is refers before the finiteelement analysis procedure movement, in view of some concrete questionmust all data preparatory work. Speaking of the electrical machineryelectromagnetic field, it mainly includes solves the region the determination,the geometry model description, the region grid cuts in half, the pitch point,the element serial number and optimized, each kind of information dataproduction and so on.2, finite element Method post-processing: letting the electric motordesigner have the clear direct-viewing understanding to the magnetic field isthe goal of doing on the electromagnetic field finite element analysis ofelectric motor, but taking one kind of numerical method, the finite elementmethod is difficult to analysis and appraisal according to vast computationresult. It is necessary for the project analysis and the design appraisal thatconverting these data to chart, the curve, the form, which is familiar withproject domains, this must use to the finite element post-processing.On the basic of analysis submersible pumping unit concrete uniquefeature, this article introduce submersible pumping system function, the basicstructure and the composition, and detail elaborate electric motor structure,the characteristic and the principle of work does in. On the basic ofinvestigation and study to research situation of domestic and foreign about inasynchronous machine electromagnetic field, did to the electrical machineryelectromagnetic field analysis method -method of difference and the finiteelement method in detail has analyzed, made the discussion in view of thedissimilar condition under electromagnetic field, the logarithm study model,solved principle and so on in region, different situation boundary condition,solution method has carried on the comprehensive description, Thecomputation has used the ANSYS analysis software.Dives in the oil electric pump unit concrete unique feature foundationin the analysis, this article to dived the oil electric pump system function, thebasic structure and the composition has carried on the introduction, andaimed at dives the oil electrical machinery structure, the characteristic andthe principle of work does in detail elaborated in to domestic and foreignabout in asynchronous machine electromagnetic field research situationinvestigation and study analysis foundation, did to the electrical machineryelectromagnetic field analysis method -method of difference and the finiteelement method in detail has analyzed, made the discussion in view of thedissimilar condition under electromagnetic field, the logarithm study model,solved principle and so on in region, different situation boundary condition,solution method carries on the comprehensive description, the computationhas used the ANSYS analysis software.The ANSYS software is a large-scale general finite element analysissoftware;it unifies the structure, the heat, the fluid, the electromagnetism andacoustics. It is widely applied in design analysis of the petroleum chemicalindustry, the aerospace, the machine manufacture, the civil engineering andso on the general industry and the scientific research domain.Calculates YQY114P using the ANSYS software to dive the oilelectrical machinery interior electromagnetic field, realized the electricalmachinery in the electrical machinery electromagnetic field computationautomatically to exert the load the function, practical, revision convenient,and the computation speed was quick. Through to electromagnetic fieldcomputed result post-processing, this article main research results as follows:1st, this article produced in the electrical machinery electromagneticfield analysis method of difference mathematical model, the differenceequation has derived, the solution, and to interrupted the error and theastringency has carried on the discussion. This article has produced in theelectrical machinery electromagnetic field analysis finite element methodmathematical model, region cutting in half, limited unit establishment.Produced the numerical analysis method physical model, solved the questionof the periodic boundary condition.2nd, this article Produced YQY114P electric motor electromagneticfield magnetic field distribution, the magnetic line of force distribution, themagnetism dense distribution, the magnetization curve of the magneticmaterial, at the same time precisely calculated the stator tooth magnetismdensity, stator yoke magnetism density.3rd, above conclusion obtained from the finite element analyticmethod, cannot be complete and realize from the traditional semi-rationalformula computational method. In the modern project technology application,must make a more accurate analysis to the equipment running condition Inorder to enhance its synthesis potency. Obviously in electric submersiblepump domain, the finite element analytic method can help to realize this goal.This article carries on the analysis and the computation in electricmotor interior electromagnetic field distribution situation for the first combiningthe finite element method and the ANSYS software in domestic. It hasovercome the tradition engineering calculation method limitation. It has thedirect-viewing guiding sense to electric motor groove model coordination andchoice of groove model;it can optimize the electric motor parameter andelectromagnetic capability;it can improve electromagnetic field calculationveracity and the entire machine design level. It has the positive significanceto oil field exploitation construction.
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