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Modelling Wireless Power Transfer Using an Array of Tesla Coils

机译:使用特斯拉线圈阵列对无线功率传输进行建模

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摘要

Wireless power transmission, or WPT, is a well-demonstrated property in electrical science and physics. Coil-and-wave transmission (CWT) consists of two Tesla coils, one powered by a controlled voltage source v src and one connected across a generic load Z 0 , at a mid- to long range distance apart with spherical capacitors at each of their top loads. The literature on the different methods of WPT varies widely, but research of CWT is sparse, lacking especially in the area of computer simulation. Recently, a physical experiment was conducted by Marzolf et al. in [1], and yielded surprising resonant frequencies in the high frequency range. The goal of this research is to answer the question of whether these reosnant frequencies originate in unexplained field effects or in non-ideal circuit behavior, and establish a formal model to indicate at what frequencies the resonant peaks occur as a first approximation. By carefully constructing a simulation of the most geometrically simple, power efficient design in the work of Marzolf et al. using the scientific software Octave, we investigate these frequencies computationally: first, an ideal scenario that has no flux leakage or exterior losses is modelled mathematically and simulated, and then, a non-ideal scenario that accounts for losses in the coils and surroundings is modelled mathematically and simulated. Both models utilize a simple formula for spherical capacitance for the top loads. After running these simulations through detailed sampling up to 4 MHz, the ideal model could not account for the resonant peaks, while the non-ideal model indicated the resonant peaks near the exact frequency ranges that were observed. An unexpected characteristic of these results was that coupling coefficients between the coils of the transmitter and receiver played a noticeable part in the indication of resonant peaks. This demonstrates that unknown field effects are not the primary driver of resonance in the ideal or non-ideal construction, and raises inriguing questions about the circuit design's relationship with resonance in the locality about the coils.
机译:无线电力传输(WPT)是电气科学和物理领域的一个久经验证的特性。线圈和波传输(CWT)由两个特斯拉线圈组成,一个由受控电压源v src供电,另一个跨接在一般负载Z 0上,中距离到远距离的距离分别是球形电容器最高负荷。关于WPT的不同方法的文献千差万别,但是CWT的研究很少,尤其是在计算机仿真领域。最近,Marzolf等人进行了一项物理实验。在[1]中,并在高频范围内产生了令人惊讶的共振频率。这项研究的目的是回答这些共振频率是起源于无法解释的场效应还是源自非理想的电路行为的问题,并建立一个正式的模型来表明共振峰在什么频率下作为一阶近似值出现。在Marzolf等人的工作中,通过精心构建最简单的几何形状,最节能的设计仿真。使用科学软件Octave,我们通过计算方式研究这些频率:首先,对没有磁通泄漏或外部损耗的理想情况进行数学建模和仿真,然后对考虑线圈和环境损耗的非理想情况进行建模数学上和模拟上。两种模型都针对顶部负载采用了简单的球形电容公式。在通过高达4 MHz的详细采样进行这些模拟之后,理想模型无法说明共振峰,而非理想模型则表明共振峰在所观察到的确切频率范围附近。这些结果的意外特征是,发射器和接收器的线圈之间的耦合系数在共振峰的指示中起着重要作用。这证明了未知场效应并不是理想或非理想结构中谐振的主要驱动因素,并提出了关于电路设计与线圈局部谐振的关系的令人质疑的问题。

著录项

  • 作者

    Pierson, Casey Thomas.;

  • 作者单位

    University of Central Oklahoma.;

  • 授予单位 University of Central Oklahoma.;
  • 学科 Electromagnetics.;Alternative Energy.;Electrical engineering.
  • 学位 M.S.
  • 年度 2017
  • 页码 71 p.
  • 总页数 71
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农业经济;
  • 关键词

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