Firstly , the dissertation has analyzed the relationship between electromagnetic force and air gap , and obtained fitting formula of force and flux density using computed results 本文首先分析了电磁力与悬浮气隙磁场之间的关系,并利用计算结果得出了悬浮力与气隙磁通密度的拟合公式。
The iron core is used to maximize the coupling between the coils ( formed by conductors ) placed on the stator and rotor , to increase the flux density in the machine and to decrease the size of machine 铁芯用于使放置在转子和定子中的线圈（由导体构成）之间的耦合最大，以增加电机的磁通密度以及减小电机尺寸。
Our factory ' s soft ferrite made from good - quality iron oxide has merits of high permeability , high saturation magnetic flux density and low loss , and id widely used in electric and electronic sets of various kinds 利用本公司优质氧化铁生产的软磁铁氧体，具有高磁导率，高饱和磁通密度和低损耗的优点，它广泛的用于各类电子电器整机中。
In single magnet modeling , from the air gap magnetic - flux density , single magnet linear model which take the flux density as the state variable is obtained , and used the fitting formula which the magnetic field analysis had obtained to revise the model parameters 在对单铁的建模中,从气隙磁通密度的角度出发,得到了以磁通密度为状态变量的单铁线性模型,并采用磁场分析得出的拟合公式修正了模型参数。
And the subroutine is developed to add the periodic condition in the commercial 3d fem software . 3d electromagnetic field analysis is done to analyze the magnetic flux distribution in the tfpm . base on the field analysis , the mathematical model is given 采用简化的三维电磁场计算方法对横向磁通永磁电机内部磁通分布进行了研究,计算了各部分的磁通密度分布和漏磁通的走向,得到了电机的空载漏磁系数及空载反电动势以及主要的漏磁通分量。
The hybrid claw - pole alternators have magnetic fields contributed by permanent magnet as well as excitation coil , and the advantages are high efficiency , have good low - speed characteristics , excitation adjustable and high flux densities . for the reason of complex claw - pole construction and 3 - d magnetic field distributions , there is lack of the research on the alternators 混合励磁爪极发电机是由永磁体和励磁线圈共同产生电机磁场的一种发电机，与传统的爪极发电机相比有高效、低速性能好和集线圈励磁的电压调节性能与高磁通密度的优点，具有很好的研究前景和使用价值。
Analysis for magnetic field of srm is very complicated since the flux waveforms in different parts of the motor vary with motor phase , stator pole and rotor number , also with the winding connections , etc , which results in the srm losses , especially iron loss calculation difficult . the temperature analysis due to the losses has become a study hot spot Sr电机铁心的磁通波形不仅与电机的相数有关,还与定、转子齿极数、定子绕组连接方式等密切相关,从而使得sr电机磁场分析很复杂,复杂的磁通密度波形导致电机损耗特别是铁损的计算非常困难。电机的损耗又会引起电机的温升,因此高性能的sr电机的热分析也成为目前的研究热点。
The emcn model is set up by use of flux - tube method . in this method , the segment in which the flux density is relatively even is considered to be an element , the permeance of each element can be calculated by use of conventional method . finally the permeance network can be set up by connecting each node with permeances , then the parameters and performance can be obtained 其基本思想是通过磁通管原理，把电机内部磁通密度相对均匀的部分看作一个单元，计算出单元的磁导，最后再把各个节点用等效磁导连接起来构成一个磁导的网络图，再根据电路的基本解法求得各个节点的磁位，从而求得电机的参数和性能。
In order to realize flux feedback control , the request of air gap flux density measurement is studied . using the 3d magnetic field analysis software , how and where to install the magnetic field sensors have been discussed . then two magnetic fields measuring methods have been chosen : the hall effects measurement and the electromagnetic induction method 为实现磁通反馈控制,分析了悬浮磁场对磁通密度测量的要求,利用三维磁场分析软件对磁场测量元件的安装方式与安装位置进行了分析,选择了两种磁场测量方法:霍尔效应法与电磁感应法,并分别设计了测量及信号放大、滤波电路,实现了悬浮磁场的测量。
By magnetic field analysis for the stage , three formulas reached : one is magnetic road magnetic force calculational formula of magnetic levitation system that except flux leakage , the second is magnetic driving force calculational formula for open magnetic road dc linear motor , the third is magnetic flux density calculational formula for dc linear motor . these formulas make reference for design , analysis and control 本文对磁悬浮定位平台进行了电磁场分析，推导出磁悬浮系统不计漏磁的简单磁路、磁力计算公式和原理样机所采用的开磁路直流直线电机推力及磁通密度计算公式，为设计、分析及控制提供参考。
