Simcenter 3D Low Frequency EM是由Siemens西门子公司推出的一款低频电磁学工具，可实现低频电磁场仿真的最大性能，并具有强大的瞬态求解器功能，包括运动。 基于有限元Simcenter MAGNET求解器，西门子收购的Infolytica有着几十年的专业知识，低频解决方案专为希望改进设计并实现最高性能和效率的电机工程师和电磁工程师而设计在他们的机电系统中。

Simcenter 3D独特的仿真环境可帮助实现比传统CAE工具更快的CAE流程，帮助工程师减少建模时间和花费更多时间进行实际工程的能力。为了使灵活的管道配置恰到好处，工程师经常对连接器位置进行许多更改，而且每次配置更改都需要等待几分钟才能完成非线性模拟。在Simcenter 3D中，工程师现在可以在设计更改后立即更新管道配置。工程师不再需要在每次手动更改之间等待。这有助于工程师以前所未有的速度获得正确的配置。

File size: 2.3 GB

Simcenter 3D Low Frequency Electromagnetics (Low Frequency EM) is part of Simcenter 3D Electromagnetics, which also includes high frequency Electromagnetics.

Simcenter 3D Low Frequency EM offers insight into the performance of electromechanical and energy conversion devices. These include utility and electronic transformers, motors, generators, linear machines (e.g. maglev), actuators, shakers, speakers, solenoids, relays, circuit breakers, induction heating, bus bars, winding systems, ignition coils, etc.

It is based on Simcenter MAGNET that is built on several decades of expertise. In addition, it leverages the multidiscipline CAE capabilities, and being geometry-centric, leverages as well, the CAD modeling of Simcenter 3D, which is built-on the NX foundation. Let us now look at some of its capabilities.

Extending Multidiscipline Analysis

The embedding of Simcenter MAGNET in Simcenter 3D extends the latter analysis Simcenter 3D CAD Modelling Interface.jpgFigure 1: Simcenter 3D CAD modeling interfacecapabilities to cover low-frequency EM performance in addition to the high-frequency EM, NVH, structural integrity, durability, and thermal modeling disciplines in one platform, from the same model.

This will permit the holistic analysis of electromechanical and energy conversion devices. The specific benefits include:

Leveraging Simcenter 3D CAD capabilities to eliminate CAD bottlenecks, by supporting the import of any CAD format, modeling of complex devices, defeaturing, tracking of modifications, etc.

Support for multiple disciplines in one integrated platform.

Analysis and Solution Types

Simcenter 3D Low Frequency EM supports both 2D (translational and axisymmetric) and 3D electromagnetic analyses, whose solution type can be static, harmonic and transient with motion capability. It has an integrated 1D circuit tool that supports the customization of current and voltage sources. Its extensive EM material library eases the initial EM model setup. The materials are customizable to account for variation in properties resulting in realistic simulations.

These electromagnetic and thermal analysis modules can simulate steady-state and transient electromagnetic and temperature fields. Some of the resulting user benefits are:

Support for linear, rotary, 6 degrees of freedom motion and multiple moving parts, supporting the simulation of complex motion like magnetic levitation, EM catapults, and robotic joints.

Increasing the efficiency and reliability of electromechanical devices by accurately considering both the EM and thermal aspects.

Validating models at extreme operating and fault conditions for reliability analysis (torque, efficiency, demagnetization, temperature hotspots, etc).

Fast solves, that are adapted and optimized for applications, e.g., transformer analysis that uses the time-harmonic solver and unary binary conditions meant to reduce the solving time.

Smart Boundary Conditions

Large models like power transformers, wind and hydro generators and heavy industry motors, are not only large but have very thin parts relative to the model’s size. This Unary SIBC and Binary BC.jpgFigure 2: Unary (SIBC) and binary boundary conditions applied to a partial transformer modellikely results in large simulation models. In addition to structured meshing, Simcenter Low Frequency EM offers binary and unary boundary conditions. Unary boundaries negate the need for a volume mesh, which significantly reduces the solution time. An example is the surface impedance boundary condition (SIBC) that is applied to conductive permeable parts, like the transformer tank, clamps, and other mechanical support structures. Binary boundary conditions permit the use of partial models.

Advanced Material Modelling

The confidence of low-frequency EM simulations is influenced by material modeling. Core nonliDemag Fields.jpgFigure 3: Demagnetization fields in a PM traction motornearities, temperature dependencies, demagnetization of permanent magnets, anisotropic and hysteresis core effects, conductor eddy-currents and proximity effects, should be taken into account depending on the study to balance the need for accuracy and speed. Besides the confidence in the results, this capability can be leveraged for:

Assessing the risk of demagnetization of permanent magnets to ensure robustness at peak or fault conditions, at elevated temperatures particular for EV/HEV traction PM motors.

Analysis of frequency-dependent losses in winding systems such as utility and electronic

Nonlinearity core approximation in the time-harmonic solver that is inherently linear for transformer analysis.

The consideration of hysteresis loss during solving is critical for applications where energy balance is important like in small devices like micro, MEMs, sensors and actuators.

Therefore, electromechanical and energy conversion devices performance and reliability can be ensured by leveraging the multidiscipline CAE capabilities of Simcenter 3D, which now includes both low and high frequency electromagnetics.