本文選題：電磁設計輔助系統(tǒng)　切入點：場路結合法　出處：《沈陽工業(yè)大學》2017年碩士論文

【摘要】：實心轉子異步電機結構簡單、機械特性“軟”、制造成本低廉,應用范圍廣泛,然而其磁場分布復雜,轉子參數(shù)計算困難。電機運行時,實心轉子中感應出的渦流不但會影響磁場的分布,而且也會使轉子阻抗發(fā)生變化。單純依靠磁路法分析其磁場和運行性能,不能精確計及端部效應等因素。采用三維有限元法,可以較全面地考慮這些因素對轉子阻抗及電機性能的影響,揭示出磁場的分布規(guī)律,為電機的運行性能分析提供了理論參考。實心轉子異步電機轉子中復雜的三維非線性渦流場計算是分析電機性能的基礎。本文從實心轉子異步電機的三維磁場分析出發(fā),采用場路結合法,計算了轉子阻抗,提出了符合工程實際的端部修正系數(shù)。并依據(jù)場計算結果和此類電機的設計原理,開發(fā)了一款界面友好、計算精準的實心轉子異步電機電磁設計輔助系統(tǒng)。本文首先通過三維有限元法分析了不同工況下的磁場分布規(guī)律,并在三維磁場研究的基礎上,計算了反電勢、轉矩等數(shù)值,通過與樣機測試結果對比可知,在不忽略轉子端部效應等前提下通過三維磁場研究電機的整體性能,可得到更為準確的計算結果。其次,以三維磁場計算結果為基礎,采用場路結合法計算出轉子的阻抗、電流、電勢及損耗,并提出了符合電機實際運行狀態(tài)的端部修正系數(shù),克服了采用傳統(tǒng)磁路算法因無法考慮端部效應所帶來的誤差。最后,依據(jù)上述研究理論,基于C#編程語言,開發(fā)了一款可用于實心轉子異步電機的電磁設計輔助系統(tǒng),用實例說明了本系統(tǒng)計算的快速性和準確性,實現(xiàn)了電機電磁數(shù)據(jù)的可視化、計算結果的表格化和曲線化。
[Abstract]:Solid rotor asynchronous motor has the advantages of simple structure, soft mechanical characteristics, low manufacturing cost and wide range of application. However, its magnetic field distribution is complex, and the rotor parameters are difficult to calculate.The eddy current induced in the solid rotor will not only affect the magnetic field distribution, but also make the rotor impedance change.The magnetic field and operation performance can not be accurately taken into account by the magnetic circuit method.The influence of these factors on rotor impedance and motor performance can be considered comprehensively by using three-dimensional finite element method, and the distribution law of magnetic field is revealed, which provides a theoretical reference for the analysis of motor operating performance.The calculation of three dimensional nonlinear eddy current field in the rotor of solid rotor asynchronous motor is the basis of analyzing the performance of motor.Based on the three-dimensional magnetic field analysis of the solid rotor asynchronous motor, the rotor impedance is calculated by using the field-circuit combination method, and the end correction coefficient is put forward in accordance with the engineering practice.According to the result of field calculation and the design principle of this kind of motor, a kind of electromagnetic design assistant system of solid rotor asynchronous motor with friendly interface and accurate calculation is developed.In this paper, the distribution of magnetic field under different working conditions is analyzed by means of 3D finite element method. Based on the study of 3D magnetic field, the reverse EMF and torque are calculated, and the results are compared with the test results of the prototype.On the premise of not neglecting the rotor end effect, a more accurate calculation result can be obtained by studying the overall performance of the motor by means of three-dimensional magnetic field.Secondly, based on the results of 3D magnetic field calculation, the impedance, current, potential and loss of the rotor are calculated by using the field-circuit combination method, and the end correction coefficient in accordance with the actual running state of the motor is put forward.The error caused by the traditional magnetic circuit algorithm can not be considered.Finally, based on the above research theory and C # programming language, an electromagnetic design assistant system for solid rotor asynchronous motor is developed. The calculation speed and accuracy of the system are illustrated by an example.The visualization of the electromagnetic data of the motor is realized, and the results of calculation are tabulated and curvilinear.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM343

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