【摘要】：隨著計算機技術(shù)的普及和發(fā)展,計算機輔助設(shè)計工程(Computer Aided Engineering,CAE)的應(yīng)用越來越廣泛,CAE系統(tǒng)的功能和計算精度都得到了很大的提高。電氣設(shè)備由于其工作特性,通常工作在“電-磁-熱-流體”場的多物理場耦合的工作環(huán)境,在研發(fā)設(shè)計初期,電氣設(shè)備的多物理場耦合分析至關(guān)重要,不僅能降低設(shè)計成本,還能縮短設(shè)計和分析周期。本論文選擇三種電氣設(shè)備進行多物理場耦合分析與設(shè)計:雙凸極電機,母線型MEI濾波器以及干式空心電抗器,對應(yīng)著旋轉(zhuǎn)類電氣設(shè)備、新結(jié)構(gòu)類電氣設(shè)備和靜止類電氣設(shè)備。全文按照層層推進的順序,包含如下幾部分:在電機部分,首先建立了雙凸極電機多物理耦合模型,并提出以靜制動有限元的方法來處理電機的旋轉(zhuǎn)問題,在此基礎(chǔ)上結(jié)合實驗求解出一類硅鋼片的磁滯損耗系數(shù),并且將此系數(shù)應(yīng)用于采用該類硅鋼片的電機中求解其損耗,通過電磁場與熱流場的數(shù)據(jù)雙向耦合,分析電機的熱流場分布,并通過實驗驗證該方法的有效性。在母線型EMI濾波器部分,首先闡述了母線型EMI濾波器這種新型集成式EMI濾波器的原理和制作工藝,對制得的樣品進行多物理場耦合有限元建模分析,提取新型結(jié)構(gòu)的電磁參數(shù)和濾波器在90℃時的載流量;針對該濾波器的結(jié)構(gòu)特點,提出了既能保持高頻下的計算精度又能減少計算量的準分布參數(shù)模型,并預(yù)測濾波器的高頻性能。分析該類濾波器結(jié)構(gòu)電感不足的缺點,提出了增強電感的方案,并應(yīng)用在功率變換器中。在干式空心電抗器部分,提出了多變量預(yù)處理、主輔雙約束的優(yōu)化算法,在建立電抗器多物理場耦合有限元模型的基礎(chǔ)上,提取優(yōu)化所需的各類參數(shù),在整個多物理場耦合分析中,優(yōu)化算法參與到其前處理、求解和后處理中,通過有限元模型重構(gòu)來實現(xiàn)優(yōu)化算法的迭代,實現(xiàn)了優(yōu)化算法與有限元的一體化,并通過算例驗證該方法的有效性。全文通過這樣的層層推進模式:以多物理場耦合分析為基礎(chǔ),從電氣設(shè)備的分析、設(shè)計和優(yōu)化方面分別以電機、母線型EMI濾波器和干式空心電抗器為例進行論述。為工程實際應(yīng)用提供了參考和借鑒。
[Abstract]:With the popularization and development of computer technology, the application of computer Aided engineering (CAE) is becoming more and more extensive. Because of its working characteristics, electrical equipment usually works in the working environment of "electric-magnetic-thermal-fluid" field coupling. In the early stage of development and design, the multi-physical field coupling analysis of electrical equipment is very important, which can not only reduce the design cost. It also shortens the design and analysis cycle. In this paper, three kinds of electrical equipment are selected for multi-physical field coupling analysis and design: double salient motor, bus type MEI filter and dry hollow reactor, corresponding to rotary electrical equipment, new structure electrical equipment and static electrical equipment. The whole paper consists of the following parts: in the motor part, the multi-physical coupling model of doubly salient motor is established, and the static braking finite element method is proposed to deal with the rotating problem of the motor. On the basis of this, the hysteresis loss coefficient of a kind of silicon steel sheet is solved by experiments, and the coefficient is applied to solve the loss in the motor of this kind of silicon steel sheet. The electromagnetic field and the data of the heat flow field are coupled bidirectionally. The distribution of heat flow field of motor is analyzed, and the validity of this method is verified by experiments. In the part of generatrix EMI filter, the principle and fabrication process of bus EMI filter, a new integrated EMI filter, are introduced. The electromagnetic parameters of the new structure and the carrier current of the filter at 90 鈩，

本文編號：2127387