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Analysis on dynamic characteristics of hybrid stepping motor and control of its power converter.

机译：混合式步进电动机的动态特性分析及其功率变换器的控制。

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摘要

An advanced lumped parameter model (LPM) taking into account magnetic saturation is developed for the analysis of a five-phase hybrid stepping motor. The permeance of the air gap is calculated as a function of the applied magnetomotive force (MMF) and the rotor position using two-dimensional Finite Element Method (2D FEM). The LPM with 2D FEM assistance provides a fast solution for the torque characteristics in the form of a continuous function. The calculated static torque is shown accurate compared with the experimental results even in the operation range where severe saturation occurs.; For the success of the LPM the accurate permeance values at each magnetic operating condition are required, which can be obtained by 2D FEM. An accurate and reliable 2D FEM model for calculation of the permeance, therefore, plays a crucial role in the LPM. An FEM model requires not only the geometry of the teeth of the stator and rotor but also their material properties which are represented by the nonlinear magnetization curves. The FEM-computed permeance turns out very sensitive to the slope of the magnetization curve. Care must be taken in modeling the air gap region in the 2D FEM because energy conversion between the magnetic energy and the mechanical energy occurs in the air gap. The fact that the air gap length is only 50micron, not sufficient for well-shaped square elements, and the meshes of the stator side and the rotor side must match at every rotor position makes the modeling difficult. This explains why a complete 3D FEM model of a hybrid stepping motor is rare in literature. Despite its modeling difficulty 3D FEM can be used for general configurations without the limitations of the LPM, which is an advantage over the LPM. The LPM results and the 3D FEM results are both compared with the experimental results, and the pros and cons are discussed.; A five-phase can be operated under several modes including full-step, half step, and micro-step modes. Regardless of the operating mode the response of the five-phase HSM is the step response because the excitation inputs are a series of pulse trains. This is why the step response analysis has been one of the most important topics in the field of five-please HSM. In order to address this topic effectively, a linear dynamic model is established. The original dynamic model, having highly nonlinear terms, is simplified to identify the fundamentals of the dynamic characteristics of the five-phase HSM such as the resonance frequencies and damping effects. (Abstract shortened by UMI.)
机译：开发了一种考虑了磁饱和的高级集总参数模型（LPM），用于分析五相混合式步进电动机。使用二维有限元方法（2D FEM），根据所施加的磁通势（MMF）和转子位置来计算气隙的磁导率。具有2D FEM辅助功能的LPM以连续功能的形式提供了转矩特性的快速解决方案。与实验结果相比，即使在发生严重饱和的工作范围内，所显示的静扭矩也能得到准确的显示。为了成功实现LPM，需要在每个磁操作条件下获得准确的磁导率值，这可以通过2D FEM获得。因此，用于计算磁导率的准确而可靠的2D FEM模型在LPM中起着至关重要的作用。 FEM模型不仅需要定子和转子的齿的几何形状，还需要它们的材料特性，这些特性由非线性磁化曲线表示。 FEM计算的磁导率对磁化曲线的斜率非常敏感。在二维FEM中建模气隙区域时必须格外小心，因为在气隙中会发生磁能和机械能之间的能量转换。气隙长度仅为50微米，不足以容纳形状良好的方形元件，并且定子侧和转子侧的网格必须在每个转子位置都匹配，这一事实使建模变得困难。这解释了为什么混合式步进电动机的完整3D FEM模型在文献中很少见。尽管建模困难，但是3D FEM可以用于常规配置而不受LPM的限制，这是优于LPM的优点。 LPM结果和3D FEM结果都与实验结果进行了比较，并讨论了其优缺点。五阶段可以在多种模式下运行，包括全步，半步和微步模式。不管运行模式如何，由于励磁输入是一系列脉冲序列，所以五相HSM的响应是阶跃响应。这就是为什么阶跃响应分析一直是五请HSM领域中最重要的主题之一的原因。为了有效解决这个问题，建立了线性动态模型。具有高度非线性项的原始动力学模型经过简化，可以识别五相HSM动力学特性的基本原理，例如谐振频率和阻尼效应。 （摘要由UMI缩短。）

著录项

  • 作者

    Kang, Seong Gu.;

  • 作者单位

    University of California, Berkeley.;

  • 授予单位 University of California, Berkeley.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 132 p.
  • 总页数 132
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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