电感线圈分布电容及交变磁场中其电感的研究

发布时间：2018-04-04 03:35

本文选题：电感线圈　切入点：分布电容　出处：《南京师范大学》2014年硕士论文

【摘要】：随着现代电力电子技术的发展,电子产品高频化已成为发展趋势,但是随之而来的元件分布参数在高频场合影响的突出又向人们提出了新的研究课题。在高频时,电感线圈除了需要考虑本身的感性特征,还需要考虑其分布电容。在线圈磁芯励磁过程中的电感量往往取其脉冲磁导率,而根据脉冲磁导率的定义可知,难以给出电感量动态的曲线,因此研究交流磁芯电感量的计算方法是有必要的。本论文首先介绍了电感线圈分布电容及其电感的研究现状。详细阐述了什么是分布电容,分析了分布电容对电路产生的影响,并建立了计算电感线圈分布电容的简化模型。等效电路分析显示层间电容是电感线圈分布电容的主体,根据电场储能是由空间内电场强度分布决定的原理,分析了“Z型”和“U型”两种不同的紧密排绕方式线圈的电场储能,并由此推导出该两种不同线圈的等效分布电容的具体表达式。介绍了一些测量电感线圈分布电容的实验方法,然后采用“不同频率下测有效电感的方法”对本文电感线圈分布电容求解方法的可行性进行了验证,通过理论计算结果与实验测量结果相比较,显示由本文所建简化模型得到的线圈分布电容是可靠的。推导出了在恒定磁场中线圈电感量的计算表达式,然后详细讨论了磁心线圈的电感量在变化的磁场中的非线性问题。从电感的定义出发推导出了适用于交流(或脉冲)励磁情况下的磁芯线圈动态电感的计算公式。本文提出的电感线圈分布电容计算表达式清晰的建立了线圈分布电容与绕组结构等参数的关系,所以方便用于指导电感器和滤波器的设计,也可用于变压器分布电容等的预估。对于磁芯线圈,在励磁过程中的电感量往往取其脉冲磁导率,难以给出电感量动态的曲线,而本文给出了适用于交流(或脉冲)励磁情况下的磁芯线圈动态电感的计算表达式。
[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.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：O441.3

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