磁铁

感应电机斜转子的精确建模

带磁铁的电机和发电机

感应电动机是磁铁的一个特长。The induction motor analysed here is a typical three-phase motor,但是磁铁模型的改进使得包含以前被忽略的特性变得容易。感应电动机的转子往往有斜槽，以减小转矩脉动；现在可以轻松创建和精确建模。

The stator windings in this model are realistic involute shapes,created with the multi-segment sweep option,which has powerful automatic blend calculations making the creation of these and other complex coil shapes easy.精确模拟线圈意味着可以研究端部效应。

周期边界条件允许建模者利用对称性；在这种情况下，只有一个60度的截面被建模，将问题大小减少6倍。

Methods and Results

定子渐开线绕组

A picture of half of one of the stator involute windings is shown on the left.一旦在磁铁中创建此段，它的多个实例可以通过应用转换导入，以创建完整的定子绕组集。可以应用于infolytica软件包中对象的可能转换是规模化的，金宝博滚球专家旋转，mirror and shift.这些转换的任何数量或组合都可以应用到我们的软件中。金宝博滚球专家

渐开线绕组的简易设计

To facilitate the design of 3D devices in our 金宝博滚球专家software,a feature,多段扫描，增加了便于设计复杂的路径，如上面所示的渐开线。The image on the the left is a snapshot of the dialog box associated with the involute winding.

感应电机的剖视图

An exploded view of the induction motor is shown here;parts of the motor are removed in order to see the windings and skewed rotor better.

MAGNETIC FLUX DENSITY

This is an arrow and shaded plot display of the magnetic flux density.转子不显示在现场视图中，只显示一个切片。注意由于转子倾斜，磁场对定子的影响。

磁铁产生的网格

This is an arrow and shaded plot display of the magnetic flux density.转子不显示在现场视图中，只显示一个切片。注意由于转子倾斜，磁场对定子的影响。

爪极发电机VHDL-AMS模型的建立

带磁铁的电机和发电机

利用系统模型发生器建立了爪极交流发电机的VHDL-AMS模型。VHDL-AMS是一种可以被许多电路和系统模拟器读取的格式。包括来自Mentor图形的SystemVision。The System Model Generator creates a Response Surface Model (RSM) of the claw-pole by driving MagNet to execute a number of static solves at different phase currents and rotor positions.该RSM嵌入到VHDL-AMS文件中，以创建功能上等同于原始磁铁模型的组件，but which can be evaluated extremely quickly in a transient circuit simulation.

Methods and Results

系统视觉电路

The claw-pole component is shown here in the SystemVision circuit.In SystemVision it is a simple matter to create this component from the VHDL-AMS file.自动根据文件中的信息标记管脚，以及模型参数，比如绕组的匝数，可以在属性对话框中修改。

捕捉RSM中的非线性

这里显示的电流与模拟结果比较好，特别地，注意，三次谐波含量明显，表明RSM正在捕捉这些机器的一个基本特性：非线性。

DIODE SWITCHING BEHAVIOUR

这里显示的二极管电流也与完整的瞬态解进行了很好的比较。The diode switching behavior can be difficult to simulate,两个模拟结果相同的事实，与系统模拟器一样，也是对瞬态解的验证。

PHASE VOLTAGES

The phase voltages are shown here.它们比磁铁瞬态模拟中的同类产品更平滑，因为电路模拟器可以承受更小的时间步。在SystemVision中模拟这种瞬态需要几秒钟的时间，compared to many hours for the MagNet transient simulation.

蓄电池纹波电压

One of the benefits of the VHDL-AMS model is the ease with which different operating conditions can be simulated.这里显示的是1500转/分和3000转/分时的电池纹波电压。在这两种情况下，电阻负载都经过调整，使电池本身通过它的电流大约为零。

二极管电桥行为

在较低的速度（1500转/分）下，三角形连接的二极管电桥表现出此处所示的行为。This result is obtained by simply editing the speed parameter in the claw-pole's property dialog.另一个版本的爪极VHDL-AMS模型有一个单独的机械终端，允许发动机以动态变化的速度驱动交流发电机。

三相变压器

TRANSFORMERS WITH MAGNET

The model presented here is the simulated results of the ohmic losses and flux density of a 3 phase transformer with a three limbed paramagnetic core ( μ_p≈8.0412×〖10〗^(-3) N⁄A^2 ).Z轴的对称性被用来最小化问题的大小和加速解决问题的时间。The coils are made of three concentric layers of different thickness.

Methods and Results

网格

The initial 3D mesh contained 325,207 tetrahedra and 58,831 nodes for the Time-Harmonic 3D solver with second order Newton polynomials.在模拟过程中对网格进行了轻微修改，因此,建立非均匀四面体。A comparison between the initial and the final 3D mesh can be seen.

磁场

To the left is a cut section of the B-field magnitude on the XZ plane at the middle of the coils,at 0° and 90°.The B field density stays below 0.26 Tesla.

主线圈电流密度

本动画显示主线圈表面的电流密度J达到2.045 A/m2，每个线圈的相移为60°。

JXB洛伦兹力

磁场与电流密度相互作用产生的力在这里显示，达到329.5千牛的峰值。

各绕组阻抗

The impedance of each winding can easily be calculated using the results from the 3D Time-Harmonic solver.Using the complex current and voltage of the windings provided by MagNet,无论是在单独的幅度和相位，还是在真实和复杂的组成部分。

TIME AVERAGE OHMIC LOSS

The picture shows the time average ohmic loss along z-axis oriented red arrow.主绕组的欧姆功耗最高，约为51kw。中间绕组的欧姆功率损失约为31千瓦，外部绕组的欧姆平均功率损失为11千瓦。This graph was made using the Field Line Graph functionality of MagNet.The values given are time-averaged.