本文選題：磁場強度 + 氣隙長度��； 參考：《吉林大學》2017年碩士論文

【摘要】：近幾年來,隨著電工技術和電工設備的不斷發(fā)展革新,越來越多的電氣元件被應用在各大電網中,而電感線圈是最基本的元件,應用范圍極其廣泛。鐵芯材料的高磁導率特性大大提高了線圈的利用效率,因此,大多數電感元件含鐵芯。氣隙可以在不改變鐵芯電感最大磁場強度及矯頑力等基本特性的基礎上,改變鐵芯電感的飽和特性,提高電感線圈及鐵芯的利用率,減小電感體積,降低成本。本文主要研究氣隙長度、位置對鐵芯電感參數的影響,為最優(yōu)電感設計和參數計算提供參考。通過分析鐵芯材料的基本特性,研究含不同長度氣隙的鐵芯電感的磁通分布以及氣隙位置等對鐵芯電感特性的影響,對比空芯電感和鐵芯電感,利用ANSYS軟件分別對空芯電感和鐵芯電感進行三維仿真,改變勵磁電流的大小,得到仿真數據和三維仿真圖形,通過對圖形的分析,得出氣隙位置、長度對電感的變化的影響情況。以一種小型電感為例,用LCR測試儀對電感線圈參數進行儀器測量,用Matlab軟件對實驗數據進行曲線擬合,得到擬合公式和擬合誤差。然后設計實驗電路,以氣隙長度作為主要的實驗變量,對電感參數進行帶電測量,把儀器測量結果與帶電實驗測量結果進行對比分析,進而對計算空芯和含氣隙的鐵芯的經驗公式進行了修正,以帶電測量的數據為準,對電感參數隨氣隙變化的趨勢進行了分析和總結。最后在實驗電路中串聯開關K,控制開關K的開斷得到階躍響應信號,算出階躍響應時間常數,對經驗公式的修正系數進行進一步的驗證。本文詳細闡述了氣隙對鐵芯電感特性的影響,得出氣隙的位置和長度會影響電感的變化率,并給出了計算空芯和含氣隙的鐵芯電感修正的經驗公式,進一步提高了電感計算的準確性,對降低變壓器損耗和提升電網安全穩(wěn)定運行有著重大的指導意義。
[Abstract]:In recent years, with the continuous development and innovation of electrical technology and electrical equipment, more and more electrical components have been applied in various power grids, and inductance coil is the most basic component, which has a wide range of applications. The high permeability characteristics of the core material greatly improve the efficiency of the coil utilization, therefore, most of the inductance elements contain iron core. The air gap can change the saturation characteristic of the core inductor without changing the maximum magnetic field intensity and coercivity of the core inductor, improve the utilization ratio of the inductor coil and iron core, reduce the volume of the inductor and reduce the cost. The influence of air gap length and position on the parameters of the core inductor is studied in this paper, which provides a reference for the design and calculation of the optimum inductor. By analyzing the basic characteristics of the core material, the effects of flux distribution and air gap position on the core inductance characteristics of the core inductor with different length air gap are studied, and the comparison between the hollow core inductance and the iron core inductance is made. Using ANSYS software to simulate air core inductor and iron core inductor respectively, change the magnitude of excitation current, get the simulation data and 3D simulation figure, get the air gap position by analyzing the figure. The effect of length on the inductance. Taking a small inductor as an example, the parameters of inductor coil are measured with LCR tester, and the curve fitting of experimental data is carried out by Matlab software, and the fitting formula and fitting error are obtained. Then the experimental circuit is designed, the air gap length is taken as the main experimental variable, the inductance parameters are measured in charge, and the results of the instrument measurement and the live experiment are compared and analyzed. Furthermore, the empirical formula for calculating hollow core and iron core with air gap is modified, and the variation trend of inductance parameters with air gap is analyzed and summarized based on the data of live measurement. Finally, the step response signal is obtained by controlling the switch K in series switch K in the experimental circuit, and the step response time constant is calculated, and the correction coefficient of the empirical formula is further verified. In this paper, the influence of air gap on the inductance characteristics of iron core is discussed in detail. It is concluded that the position and length of air gap will affect the change rate of the inductor, and the empirical formula for calculating the correction of the inductance of the core and the iron core with air gap is given. The accuracy of inductance calculation is further improved, and it is of great significance to reduce transformer losses and enhance the safe and stable operation of power grid.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM55

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本文編號：2052312