MagNet

2D/3D Electromagnetic Field Simulation Software

MagNet 2D/3D is a powerful simulation software which engineers and scientists worldwide use for the design of motors, sensors, transformers, actuators, solenoids or any component with permanent magnets or coils.
Overview
Features
Options
Overview

MagNet offers both 2D and 3D electromagnetic field simulations, all within the same user friendly interface. MagNet uses the finite element technique for an accurate and quick solution of Maxwell's equations. Each module is tailored to simulate different types of electromagnetic fields and is available separately for both 2D & 3D designs.

Magnetostatic
  • Non-linear analysis
  • Specified currents may flow through any type of conducting material, including magnetic materials
AC (Time Harmonic)
  • Analysis based on a single frequency in the complex domain
  • Eddy currents, displacement currents, skin effects & proximity effects
Transient (Time-varying)
  • Non-linear analysis
  • Second-order time stepping
  • Resume Feature: pause at a particular time step for inspection
  • Core losses, proximity effects and eddy currents
Motion
  • Supports rotational, linear and general (multiple degrees of freedom) motion
  • Velocity & load driven motion problems
  • Computes induced currents due to motion
  • Supports multiple moving components
Common Solver Features
  • Multithreaded for true multicore support
  • Symmetry for reducing solution domain
  • Parametric Module for "What if?" analysis
  • Circuit Coupling
  • Coupling with ThermNet 2D/3D
  • Optimization with OptiNet

Features

Geometric Modeller
  • Easy to use Extrusion-Based and Solid Modelling tools make even the most complicated designs quick and painless to draw.
  • 3D ACIS Modeler from Spatial, with DXF/SAT imported natively.
  • Additional filters allow CAD files to be imported efficiently, including the coils. Formats include STEP, CATIA, Pro/E, IGES
  • Coil Creator Tool - add common coil types from template or easily create custom coil types
  • Full Boolean operations and multi-sweep functions for complex geometries

Material Library
  • Pre-defined library of linear, nonlinear and anisotropic materials
  • Advanced loss computation based on Steinmetz equation
  • User-defined materials easily added with Material Editor & curve fitting utilities
  • Simple Drag-and-Drop applies a material to any part of the model, which is then stored with the model.

Circuit Modeller
  • Coils can either be created using simple inbuilt tools, or imported as CAD files.
  • External drives and loads can be added to the model and solved simultaneously (see also System Modelling).

Meshing & Adaption
  • Adaptive strategy determines where refinements are needed after each step by:
    • Subdividing elements (2D/3D)
    • Increasing the polynomial order (3D)
    • Both techniques combined (3D)
  • Mesh layers for skin depth analysis and highly anisotropic volume elements
  • Separate mesh for coupled thermal problems (with ThermNet)
  • Motion Re-mesh region for more efficient meshing process
  • Extensive manual meshing controls

Parametric Studies & What-if Analysis
  • Perform multiple experiments for "What if?" analysis
  • Any quantity can be parameterised (e.g. geometric features, materials, mesh settings) and can be varied through a user-specified range of values
  • Multi-parameter solutions, with automatic display of solution vs. Parameter values (including animations).

Customisation & Interoperability
  • Powerful scripting allows MagNet to work with any programming environment that implements ActiveX scripting and OLE Automation (such as Visual Basic Script, Java Script, Perl, etc.).
  • MagNet can then be coupled to any Active-X compliant application such as Microsoft Office, Matlab, MathCad, AutoCAD etc.

System Modelling
  • Control circuits can also be included by a co-simulation with a PSIM or Simulink model.
  • The magnetic model can be characterised by a response surface using MagNet, and exported to Simulink or SystemVision (Mentor Graphics) as a VHDL-AMS file
Scripting
  • Automate repetitive tasks
  • Link to third party software such as Excel® or MatLab®
  • Customize MagNet for your needs

Results - Quantities, Fields & Charts
  • Winding losses, eddy current and hysteresis losses
  • Demagnetization
  • Magnetic flux density (Β), Current density (J) & Lorentz Force Density
  • Energy & Flux linkage
  • Voltage & Current
  • Force & Torque
  • Impedance, Inductance & capacitance
  • And more

Post-Processing
All of the data is available in a variety of formats and easily accessible with the Post-Processing and Project toolbars:
  • Detailed field visualizations
  • Charts
  • Field probing
  • Export to Excel
  • Export to MpCCI from Fraunhofer SCAI for multiphysics analysis

System Model Generator - Create accurate component models in VHDL-AMS, Simulink or other formats for use in multi-domain system simulation software.
An electromechanical device in MagNet can be exported as an RSM in VHDL-AMS format for use in third party system simulation software.

Designing mechatronic systems requires understanding the significant interactions between the electromechanical components and the analog or digital electronics.

MagNet's automated System Model Generator can create accurate response surface models (RSM) in VHDL-AMS format for combining these two design environments.

Within minutes you can generate a VHDL-AMS model of your electric machine for use in any system simulation software which supports IEEE standard 1076.1.

Advantages
  • System integration and verification with a highly accurate model of the component
  • Reduces unanticipated complications and costly modifications in final stages of design
  • Easy to include in existing workflow
  • Optimize component performance in mechatronic systems
Trajectory Evaluator - Predicting the trajectory of a charged particle over time.
The Trajectory Evaluator is used with MagNet and ElecNet to simulate the path of one or more particles while under the influence of electromagnetic or electric fields.

Typical applications which require combining field solutions with particle trajectory calculations include: beams (electron and ion guns), filtration, precipitators, ion traps, deflector plates and more.

The particles are first characterized by specifying the following parameters:
  • Initial force and force direction
  • Charge
  • Mass
  • Energy
  • Dynamic Coefficient of Viscosity (drag force)
  • Optionally account for relativistic effects
  • Angle
Once the simulation is complete, the Trajectory Evaluator reports the following results:
  • Particle Position (chart)
  • Particle Velocity (chart)
  • Particle Acceleration (chart)
  • Position, Velocity and Acceleration at each time step (text file)
  • Trace of particle's trajectory
The Trajectory Evaluator supports the following solver modules:
  • MagNet 3D magnetostatic, time harmonic (AC) or transient solver
  • ElecNet 3D electrostatic solver
  • A combination of magnetostatic and electrostatic fields
For MagNet 3D time harmonic and transient solvers
  • Simulate the entire trajectory at a fixed phase or time instant
  • The phase or time instant can be varied at each step of the trajectory which is automatically calculated based on the trajectory time steps coupled with the frequency
MagNet Plug-in for Simulink® - Dynamic link between Simulink and MagNet for mechatronic analysis.
The MagNet Plug-in for Simulink (from The MathWorks©) combines the analysis capabilities of these two software tools, offering a powerful and efficient solution to designers of electromechanical devices with closed-loop control circuits (such as motors or actuators).

The load, voltage and current signals are transferred from Simulink to MagNet (and vice versa) during the co-simulation process. This constant data exchange links the two models and produces interdependent multi-domain results.

Quick and Easy Setup A MagNet object is selected from Simulink's library of elements and inserted into the system control circuit. The block element created links to a specified MagNet device file, with input and output ports that are used for connecting the circuit's signals to the device's coils. The setup options include:
  • MagNet time step value
  • MagNet solver to use
  • Saving of the MagNet solution (for further post processing)
  • Independent time step value for MagNet (significantly reduces co-simulation time without reducing accuracy)
Co-simulations of both the dynamic control system and the electric machine takes into account:
  • Eddy currents
  • Material non-linearity
  • Mechanical movement
  • Complex drive and control circuits
MagNet Plug-in for PSIM® - Dynamic link between PSIM and MagNet for mechatronic analysis.
The MagNet Plug-in for PSIM enables co-simulation capabilities between PSIM (from Powersim Inc.) and MagNet.

The voltage and current signals of PSIM are transferred to MagNet (and vice versa) during the co-simulation process. This constant data exchange links the two models and produces interdependent multi-domain results.

Quick and Easy Setup From PSIM, the MagNet file of the device is selected. A block element is created with input and output ports which are used for connecting the circuit's signals to the device's coils. The setup options include:
  • MagNet time step value
  • MagNet solver to use
  • Saving of the MagNet solution (for further post processing)
Allowing separate time step values for PSIM and MagNet significantly reduces the co-simulation time without affecting the accuracy of the results.

Co-simulations of both the control circuit and the electric machine take into account:
  • Eddy currents
  • Material movement
  • Complex drive and control circuits
OptiY - Use with MagNet to perform optimisation and sensitivity analysis on any electromagnetic device.
Based on a long research and development at Dresdner University of Technology in Germany from the early 1990, OptiY GmbH has been founded in 2006. The mission is to develop and promote the software OptiY® and to help all engineers making their product development better, faster and cheaper.

OptiY® is an open and multidisciplinary design environment providing most modern optimization strategies and state of the art probabilistic algorithms for uncertainty, reliability, robustness, sensitivity analysis, fatigue life prediction, data-mining and meta-modeling. The simulation system can be considered as black box with inputs and outputs. Within, it is an open platform for different kind of model classes. The adaptation to a special simulation environment takes place by a suitable interface. Collaborating different simulation systems is possible as networks, finite-element-method, rigid body dynamics, also material test bench as control optimization for drives. Use OptiY with MagNet to perform optimization and sensitivity analysis on any electromagnetic device.

Two case studies, Robust Design of Induction Motor and Tolerance Analysis of Surge Arrester, which demonstrates the linking of these products, can be viewed on OptiY's web site.

Contact Information:
Friedrich-Bergius-Ring 15
97076 Wuerzburg
Germany

E-mail
info@optiy.eu

Website
http://www.optiy.eu

Telephone
49 (93 05) 988 - 9425
Fax
49 (93 05) 988 - 9427