Application Pages

Switched Reluctance Motor: Comparing FEA with RSM

This application analyses a switched reluctance motor using two different methods: the MagNet Transient 2D with Motion solver, and a circuit simulator with a response surface model (RSM) created with the System Model Generator.

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Accurately modeling the skewed rotor of an Induction Motor

The induction motor analysed here is a typical three-phase motor. The rotor is skewed; this is easily created and accurately modeled. The stator windings in this model are realistic involute shapes, created with the multi-segment sweep option; accurately modeled coils means that end effects can be studied. The periodic boundary condition allows the modeler to take advantage of symmetries; in this case, only a 60-degree section is modeled, reducing the problem size by a factor of 6.

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Cogging torque in a skewed brushless DC motor

The predicted cogging torque in a brushless DC motor is compared between two different stator geometries: a straight stator and a skewed stator. MagNet makes it easy to set up multiple problems for solution at different rotor angles. And MagNet’s Static 3D solver reports the magnetic forces and torques experienced by each body in the model, so it is easy to create a torque-angle curve.

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Simulating a Skewed Induction Machine in 2D

By definition, skewing is a three-dimensional feature and usually requires lengthy 3D simulations. Fortunately, MagNet has unique mesh capabilities which make it possible to accurately model skew using the powerful 2D solver and a multi-slice approach.

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Design Optimization of an NDT Sensor Probe

Design of the probe and its suitability for detecting particular types of defects: starting from a model based on the WFNDEC Eddy Current Benchmark Problem 2, OptiNet was used to determine the optimal coil geometry and frequency at which the inspection should be performed.

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Using the Mesh Layers feature on Nondestructive Testing Problems

For NDT problems, there is a need to model the magnetic fields and eddy currents accurately in the regions under inspection. The fields decay rather quickly to zero in the surrounding regions. Further, the fields tend to change very quickly (exponential decay) with increasing depth into the test specimen (skin depth effects), and not nearly as rapidly in the two perpendicular directions. The Mesh Layers feature allows the construction of a mesh that is optimized for these types of problems.

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Core Loss and Efficiency Calculations

Infolytica's products have adopted an advanced core loss model. This can be used to accurately determine the efficiency of a permanent magnet machine, or when coupled with ThermNet, provide a better simulation of temperature changes in a permanent magnet voice coil.

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Advanced Optimization of an IPM Machine

This example looks at the optimization of a 3-phase, 4-pole single-barrier IPM using the combined power of MagNet and OptiNet. The goal is to optimize the motor’s performance with respect to a reasonably realistic and complex objective function by changing a few simple geometric parameters (the size and position of the permanent magnets) and the advance angle.

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