The AC Permanent Magnetic Synchronous Motor Based on Cosine Inverse Proportional Air Gap 基于余弦反比气隙磁场的交流永磁同步电机
A kind of new typed permanent magnetic suspension conical spiral blood pump with rather big air gap was put forward, and the basic structure of permanent magnetic suspension blood pump was introduced. 提出了一种新型具有较大气隙的永磁体磁悬浮锥形螺旋血泵,介绍了永磁体磁悬浮血泵的基本结构。
Based on the magnetic field analysis and modeling, the distribution of magnetic force line and the variety of magnetic intensity in the air gap have been calculated with the change of the circular angle between the outer and the inner magnets. 通过磁场分析、建模,对其永磁磁场进行数值计算,结合实例计算出内外磁转子不同转角时的磁力线分布及其磁转矩、气隙内磁感应强度。
Firstly, the electromagnetic radial force of asynchronous machine is analyzed based on the traditional analysis method: the magnetic potential and the magnetic conductance law. The distribution of air gap magnetic-flux density and the radial force wave are analyzed with these methods either. 首先,基于传统的解析方法分析了研究异步电机电磁径向力波采用的近似磁势乘磁导法,用磁势和磁导的乘积来分析气隙磁通密度的分布,并以此研究径向力波。
The magnetic circuit of the generator is designed with the permeance method, and analytic expression is obtained on the magnetic induction, the permeant magnetic material thickness and length of air gap. 利用磁导法对此装置进行了磁路设计,得出了磁感应强度、磁体厚度、气隙长度三者之间的解析表达式。
It is found that magnetic flux density waveform in the air gap varies from rectangular to approximately sinusoidal waveform when the rotor position changes from direct axis at no load to quadrature axis at load with power angle and phase current increasing. 计算发现当转轴位置从空载的d轴随功率角和电流增大到负载的q轴时,气隙磁密波形逐渐从矩形变为接近正弦形。
Difference Method for Solving the Magnetic Field in the Air Gap 求解气隙磁场的差分方法
Calculation and experiment show that the view of equivalent magnetic network model analysis the air gap magnetic of motors, result directly and apply convenient, it's worth extending. 计算和实验表明,基于等效磁网络模型对电机气隙磁场进行分析,结果直观,应用方便,是一种值得推广的分析方法。
In three-phase symmetric steady state the electromagnetic forces acting on the inner surface of the water turbogenerator stator core are obtained in consideration of the radial vibration displacements with the magnetic field in air gap coupling of the stator core. 二计算了三相对称稳态运行状态下考虑定子铁心径向振动位移与气隙磁场的相互耦合时,作用于水轮发电机定子铁心内圆表面的电磁力。
The operational principles of this device, the calculation method and steps of the magnetic circuit, the magnetic field partition of working air gap, and the calculating of the magnetic circuit with magnetic leakage coefficient method are introduced. 介绍其工作原理、磁路的计算方法、步骤,以及对工作气隙进行磁场划分,用漏磁系数法计算磁路。
The adoption of hybrid magnetic circuit structure in permanent magnet motors can effectively increase air gap flux density. 永磁电机中采用混合式磁路结构能有效地提高气隙磁通密度。
End effects and eddy currents bring ill impact to air gap magnetic flux which reduce its available magnetic flux of air gap and pull coefficient. 边缘效应和涡流大小对直线电机气隙磁链产生重要影响,造成气隙有效磁通和牵引力系数降低。
In this paper, a simplified bearing model with equivalent current density distribution around the inner surface of the stator is presented first, then the analytical solutions of the magnetic field in the stator, air gap and rotor are obtained. 该文首先通过等效的面电流分布和轴承简化模型,给出了轴承、气隙和转子内电磁场的解析解,并在此基础上计算了作用在转子上的电磁力和转子内的涡流损耗。
Analysis of Magnetic Field in Air Gap Due to Permanent Magnet Motor 永磁电机气隙磁场的解析分析
A new mathematic model of the shaded pole motor with step air gap is presented which consider the magnetic field sine wave resulted from step air gap. 提出了阶梯气隙罩极电动机的一种新数学模型,这一模型考虑了由于阶梯气隙存在气隙磁场畸变而增加正弦分量所产生的影响。
The LIM has the second longitudinal end effect caused by eddy currents in secondary plate in its operation, which reduces its available magnetic flux of air gap and pull coefficient. 单边直线感应电机运行中因次级板产生涡流而存在第二类纵向边缘效应,造成气隙有效磁通和牵引力系数降低。
Analyzing Permeance Harmonic Magnetic Field in air gap of Pole-changing Salient-pole synchronous Machine and Circulating Current in Paraller Branches of Stator Winding Caused by It 变极凸极同步电机气隙磁导谐波磁场及其在定子并联支路中引起环流的分析
The influence on the maximum transmittable torque from the number of magnetic poles, air gap, permanent materials, operating temperature, demagnetization and magnetic masking is studied. 探讨了磁极数、气隙、永磁材料、工作温度、退磁和屏蔽罩对永磁齿轮传递最大转矩的影响。
Further along, the influence of harmonic wave of magnetic conductivity of air gap and saturation of motor on wave pattern of wind electric current of micro-step driving was analyzed. 进而分析了气隙磁导谐波及电机饱和对微步驱动电流波形的影响。
Analyses on Magnetic Nonlinear Coupled Oscillations in Air Gap of a Generator Rotor System 发电机转子气隙磁非线性耦合振动分析
The measurement range of current is limited by linearity range of GMM, so an adjustable air gap is set in magnetic circuit. The numerical relationship between the air gap and the measurement range of current is defined. 由于GMM工作的准线性区限制了电流检测的量程,为此在磁路系统中设置一个可调节的气隙,确定了气隙的大小和电流检测量程的数值关系。
Because of the existence of air gap between different parts of steel cores of reactor, there is edge effect in the magnetic field around the air gap. 由于电抗器两段铁心之间存在气隙,在气隙周边位置的磁场存在边缘效应。
In addition, as harmonic magnetic field move at different speeds relative rotor and stator created by harmonic magnetic potential the stator and rotor windings in the air gap, the additional losses were created in the iron core. 此外,由于定子和转子绕组在气隙中建立的谐波磁势所产生的谐波磁场以不同的速度相对转子和定子运动,在铁心中产生附加损耗。
The magnetic characteristic of annular iron core which has air gap and the open-loop characteristic of multichannel comparator for heavy direct current have studied. 本文分析了多通道直流大电流比较仪的带气隙的环形铁心的磁特性。
Finally the vibration of the stator current detection method, derived the formula of unilateral magnetic pull that the distribution of air gap asymmetry case, the rotor of the electromagnetic force multiplier cycle contains two components. 最后介绍了振动的定子电流检测法,推导出了单边磁拉力公式,指出了气隙分布不对称情形下,转子上的电磁力含有2倍频周期分量。
It shows that magnetic flux density waveform in the air gap relates to magnet configuration, current harmonics, wound distribution, the number and formation of tooth slot of stator and power angle. 计算表明气隙磁密波形与永磁体的布置方式、电流的谐波、绕组的分布形式、定子齿槽数和形状及功率角直接相关,用数值方法找到了产生轴向电磁力谐波的规律。
Under the condition of ignore the secondary factors, the equivalent magnetic circuit of large air gap U magnetic core is given in this paper. And achieve the relationship among coupling coefficient, magnetic flux and magnetic resistance. 在忽略次要因素的前提下,给出了大气隙U型磁芯等效磁路,并通过分析得到了耦合系数与磁通和磁阻间的关系。
The results of the magnetic field of the permanent magnet and the air gap magnetic field are analyzed to prove the rationality of motor design. 对结果中永磁体磁场和气隙磁场进行了分析,验证了电机设计的有效性。
Drum washing machine at work, due to the role of the load makes the asymmetry distribution of the magnetic field distribution between the drive motor stator and rotor air gap, resulting in the rotor to generate unilateral magnetic pull, allowing torque pulsation occurs. 滚筒洗衣机工作时,由于负载的作用使得驱动电机定转子之间的气隙磁场分布呈现不对称分布状态,从而在转子上产生单边磁拉力,使得转矩出现脉动。
The magnetic circuit of loosely coupled transformer is analyzed particularly. The division method is used to accurately calculate the gap magnetic resistance with air gap and magnetic core size. 接下来论文对松耦合变压器的磁路进行了十分详细的分析,通过分解法比较精确的分析了气隙和磁芯尺寸对气隙磁阻和磁芯磁阻的影响。