ProductsFEA Software for Electromechanical DesignJMAG-Designer [Geometry Modeling]

Linking to CAD Systems

In addition to importing CAD models, changes can be made to the geometry within a CAD system while preserving conditions settings from JMAG. Change the geometry and immediately implement analysis calculations, skipping the step of resetting conditions. This means a dramatic improvement in the efficiency of analysis work using CAD.

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Linking to CAD Systems

Geometry Modeling Updated

A specialized geometry modeler made specifically to create JMAG analysis models. CAD-like operations enable easy geometry modeling in either 2D or 3D.

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Create a 2D geometry

Model Extension from 2D to 3D

Detecting Overdefined
Constraints

Measuring Dimensions

Create a vertical line,
a tangent line and an arc
specifying two points

Perfect Constraint

Specifying a Feature Pattern

Merging Geometry

Geometry Change of
Imported CAD Using Direct
Modeling
New

Transformer Template

Find specialized templates for compact transformers and reactors.
Easily create combinations using manufacturer-supplied core geometries, bobbins and coils.

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Create a transformer geometry

Motor Template

Select one of the default templates and define the analysis model simply by entering design parameters like the number of slots, motor diameter or coil pattern.
You can create user-defined templates.

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Create a Moter geometry

Coil End Modeling

You can create using the coil-end geometry template. Create geometries virtually identical to actual winding just by entering parameters. This enables greater accuracy in accounting for the impact of flux leakage coming from coil ends and joule loss from coils. And you can also use this for more precise coil inductance evaluations.

Coil end modeling

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Making a Coil End Geometry

Section analysis

A 2D analysis can be run directly from a 3D analysis model by automatically taking out a section from the 3D model. This feature is useful particularly for a motor analysis that uses both 2D and 3D analyses. It also allows existing 3D CAD models to be used for 2D analysis without having to manually create a separate 2D model.

Section analysis

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Cross-section Analysis Using a 3D Model

Multi-Slice Method

Enabled a high-speed calculation for 2D model incorporating 3D effect.
Re-calculation by the multi-slice method is possible based on the existing 2D data.

Multi-Slice Method Multi-Slice Method

Multi-Slice Method

Multi-Slice Method

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2D Analysis Allowing for Motor Skew

Gap / Insulation

Gap

This is a condition for doing settings without generating mesh for small magnetic spaces.
For example, when building a core from multiple divided cores, narrow spaces are produced between them. These spaces create strong magnetic resistance, so it is desirable to generate a mesh for the spaces in order to do accurate analysis. However, generating mesh in small spaces causes a huge increase in the number of mesh elements, requiring a lot of calculation time. This can also lead to a degradation of the ICCG convergence due to mesh breakdown.
Using this condition makes it possible to express the magnetic resistance without creating mesh for the spaces.
Below, for the center gap of a reactor, the coil magnetic flux is evaluated using this condition with a gap length varied from 0.1 mm to 2 mm without creating mesh in the gap. Easy magnetic flux evaluation is possible using JMAG-Designer's case control.

Relationship between gap length and magnetic flux
Relationship between gap length and magnetic flux

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Allow for a Magnetic Gap

Insulation

Similar to the Gap condition, this is a condition that expresses magnetic resistance without modeling spaces created in cores and magnets.
For example, magnets are sometimes divided in order to reduce eddy currents, but if mesh is generated for the spaces, it takes a lot of work to create the model when the number of magnet divisions has to be changed.
With this condition, just by setting the number of division planes or by checking the box for insulation in the part, electrical insulation can be modeled. Precise eddy current evaluation can be done easily because it is not necessary to change the mesh.

Evaluation of eddy current reduction by magnet division
Evaluation of eddy current reduction by magnet division

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Allow for Electrical Insulation

Eccentricity

In JMAG, simple rotation and translation motion can be used without any particular restrictions. Change things like the number of rotations or speed for each specified interval, as well as motion type and constant speed. And through the equation of motion you can define motion that changes position moment to moment from the electromagnetic force calculated in magnetic field analysis. In such cases, you can also set external loads such as load torque and friction torque at the same time. And you can also handle even more complicated forms of motion.

Motion including eccentricity
Motion including eccentricity

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Rotor Eccentricity Analysis

Geometry Model Diagnosis

Verify whether or not geometry can be used for mesh generation when geometry is created. Speed up your workflow through verifying if mesh can be generated for geometry at earlier stage.

Geometry Model Diagnosis

Geometry Scale

  • The geometry scale can be adjusted from the geometry editor window
    • The scale no longer needs to be adjusted prior to importing geometry
    • Basic shapes, regions and parts can be expanded and shrunk based on arbitrary points that include the origin

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Scaling of Geometry

Geometry Library

  • A library that has basic 2D and 3D geometries
  • Geometry can be created by simply entering geometry parameters, eliminating the need to create sketches and set features
    • Boxes, spheres, cylinders, cones, prisms, tori, and spirals for 3D geometry are supported
    • Rectangles, polygons, circles, and ellipses for 2D geometry are supported

Geometry Library

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Using Geometry Libraries to Create Basic Geometry

Wire Template

  • Wires inside a slot can be easily created for an iron loss or leakage inductance analysis by setting parameters
    • Specify the diameter, placement, skin depth, and geometry of the wire
    • Automatically calculate the fill rate

Wire Template
Example of creating a φ1mm wire

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Creating Coil Wires

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