本文選題：電感線圈　切入點(diǎn)：分布電容　出處：《南京師范大學(xué)》2014年碩士論文

【摘要】：隨著現(xiàn)代電力電子技術(shù)的發(fā)展,電子產(chǎn)品高頻化已成為發(fā)展趨勢,但是隨之而來的元件分布參數(shù)在高頻場合影響的突出又向人們提出了新的研究課題。在高頻時,電感線圈除了需要考慮本身的感性特征,還需要考慮其分布電容。在線圈磁芯勵磁過程中的電感量往往取其脈沖磁導(dǎo)率,而根據(jù)脈沖磁導(dǎo)率的定義可知,難以給出電感量動態(tài)的曲線,因此研究交流磁芯電感量的計算方法是有必要的。 本論文首先介紹了電感線圈分布電容及其電感的研究現(xiàn)狀。詳細(xì)闡述了什么是分布電容,分析了分布電容對電路產(chǎn)生的影響,并建立了計算電感線圈分布電容的簡化模型。等效電路分析顯示層間電容是電感線圈分布電容的主體,根據(jù)電場儲能是由空間內(nèi)電場強(qiáng)度分布決定的原理,分析了“Z型”和“U型”兩種不同的緊密排繞方式線圈的電場儲能,并由此推導(dǎo)出該兩種不同線圈的等效分布電容的具體表達(dá)式。 介紹了一些測量電感線圈分布電容的實(shí)驗(yàn)方法,然后采用“不同頻率下測有效電感的方法”對本文電感線圈分布電容求解方法的可行性進(jìn)行了驗(yàn)證,通過理論計算結(jié)果與實(shí)驗(yàn)測量結(jié)果相比較,顯示由本文所建簡化模型得到的線圈分布電容是可靠的。 推導(dǎo)出了在恒定磁場中線圈電感量的計算表達(dá)式,然后詳細(xì)討論了磁心線圈的電感量在變化的磁場中的非線性問題。從電感的定義出發(fā)推導(dǎo)出了適用于交流(或脈沖)勵磁情況下的磁芯線圈動態(tài)電感的計算公式。 本文提出的電感線圈分布電容計算表達(dá)式清晰的建立了線圈分布電容與繞組結(jié)構(gòu)等參數(shù)的關(guān)系,所以方便用于指導(dǎo)電感器和濾波器的設(shè)計,也可用于變壓器分布電容等的預(yù)估。對于磁芯線圈,在勵磁過程中的電感量往往取其脈沖磁導(dǎo)率,難以給出電感量動態(tài)的曲線,而本文給出了適用于交流(或脈沖)勵磁情況下的磁芯線圈動態(tài)電感的計算表達(dá)式。
[Abstract]:With the development of modern power electronics technology, the high frequency of electronic products has become a trend. However, the influence of component distribution parameters on high frequency occasions has brought forward a new research topic.At high frequency, the inductance coil needs to consider not only its inductive characteristics, but also its distributed capacitance.The inductance in the on-line coil core excitation process often takes its pulse permeability, but according to the definition of the pulse permeability, it is difficult to give the curve of the inductance dynamic, so it is necessary to study the calculation method of the AC core inductance.This paper firstly introduces the research status of the inductance coil distributed capacitance and its inductance.What is distributed capacitance is described in detail, and the influence of distributed capacitance on circuit is analyzed, and a simplified model for calculating the distributed capacitance of inductance coil is established.The equivalent circuit analysis shows that the interlayer capacitance is the main part of the distributed capacitance of the inductance coil. According to the principle that the electric field energy storage is determined by the distribution of the electric field intensity in the space,In this paper, the electric field energy storage of two different tight winding coils, Z type and U type, is analyzed, and the concrete expression of the equivalent distributed capacitance of the two coils is deduced.This paper introduces some experimental methods for measuring the distributed capacitance of inductance coils, and then verifies the feasibility of calculating the distributed capacitance of inductance coils by "the method of measuring effective inductance at different frequencies".By comparing the theoretical calculation results with the experimental results, it is shown that the coil distributed capacitance obtained from the simplified model in this paper is reliable.The calculation expression of coil inductance in a constant magnetic field is derived, and then the nonlinear problem of the inductance of the core coil in the changing magnetic field is discussed in detail.Based on the definition of inductance, a formula for calculating the dynamic inductance of magnetic coils suitable for AC (or pulse) excitation is derived.The calculation expression of the distributed capacitance of inductance coil clearly establishes the relationship between the distributed capacitance of coil and the structure of winding, so it is convenient to guide the design of inductor and filter, and can also be used to predict the distributed capacitance of transformer.For the core coil, the inductance in the excitation process often takes the impulse permeability, so it is difficult to give the dynamic curve of the inductance. In this paper, the calculation expression of the dynamic inductance of the core coil suitable for AC (or pulse) excitation is given.
【學(xué)位授予單位】：南京師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：O441.3

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