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Opera 18

Opera 18


Version 18 & 18R1 & 18R2 of Opera introduce the following significant new features:




  • The Winding Tool
  • Tabbed Menu Interface customisation
  • Material Database




  • Upgraded Geometry kernel and CAD interfacing
  • Multiphysics Analysis Setup Tool
  • Multi-core (Parallel) GUI operations
  • New 3D Mesher
  • Transient Surface Impedance Boundary Condition (SIBC) with loss calculations
  • Thin Plate Boundary Condition
  • Prism Gap Meshing
  • Space Charge solution process improvements




  • Additional analysis types




  • Additional standard features




  • Additional Support Knowledgebase (ASK) extension


For the list of supported hardware for Opera 18 click here.


For information on installing & upgrading click here.


To access the download site click here*.


*To download the software you will need your customer number, license number and access code. Please contact us if you do not have this information.





The Winding Tool

winding-toolThe Winding Tool is a new analytical tool that is a separately licensed option which is available both within Opera-2d/PP and Opera-3d/Modeller.


The Winding Tool is dedicated to electrical machine design within Opera FEA software. The main purpose of this tool is to help users assess feasibility and optimality of different winding configurations.


The Winding Tool will provide users with the following output:


  • Optimal winding layout (circular and linear representation)
  • Stars of Slots representation
  • Winding factor harmonics
  • Winding mmf harmonics
  • GÖrges Diagram


Tabbed Menu Interface customisation


The position of the Tabbed Menu Interface (TMI) can be customised to appear at the top of the screen, or on the left-hand side. The graphical user interfaces can be now used with keyboard shortcuts which have been defined for some of the more commonly used functions. The full list of shortcuts is available in the New Features document.



Permanent Magnet Material data


Material data, in the form of BH and Demagnetization data is now provided for a range of Magnequench MQ1 Materials.




Improved Geometry Kernel and Interfacing


The geometric modelling software used in Opera-3d/Modeller has been upgraded to the latest release, ACIS R25. This provides interoperability with additional CAD formats (licensed) and updates the surface mesh generator. When importing CAD models, if material and part numbers exist in the file, Opera will label the resulting Opera geometry with the references.


Modeller Analysis Setup Tool


Analysis settings

A new graphical tool has been included in the Opera 3d/Modeller to prepare data for analysis. The Analysis Setup Tool provides an interface to the ANALYSISDATA, DBCASEDATA and MULTIPHYSICS commands to prepare a single analysis, or sequence of analyses as part of a multiphysics analysis.


The tool consists of 3 panels:

  1. On the left is a list of the analysis types. These can be dragged onto the central panel to be added into the sequence of analyses at any position in the list.
  2. The central panel contains the sequence of analyses. This sequence can be altered by dragging additional analysis parts into the sequence (they can be dropped either at the end or earlier in the sequence), or an existing sequence can be altered by deleting analysis parts or SHIFT+dragging them to another location.
  3. If an analysis in the central panel is selected, its properties and parameters can be adjusted using the property sheet which shows in the panel on the right.

When the Analysis Setup Tool is closed, the commands necessary to create the analyses with their parameters will be run in the Modeller.

Transient Surface Impedance Boundary Condition (SIBC) with loss calculations


The Surface Impedance Boundary Condition (SIBC) is now available in Transient EM analysis, including Demagnetization and Motional Analysis. Transient Surface Impedance Boundary Condition (SIBC) with loss calculationsSIBC simplifies the modelling of materials with very small skin depths compared to the size of the model. It avoids the need to create very small elements on the surfaces of such materials.


The power loss calculated in a harmonic or transient analysis using the Surface Impedance Boundary Condition can now be used as the heat input into a thermal analysis in an automated multiphysics sequence.


Thin Plate Boundary Condition


The Opera-3d Magnetostatics solver has a new boundary condition which can be used to represent thin plates of soft magnetic material. When analysing certain applications such as ship signatures and magnetic shields the geometry can lead to aspect ratio problems in the mesh, whereby the area of a feature can be much greater than its depth. Representing this with standard volume elements can lead to either numerical problems in solution or meshing problems in pre-processing. Using the Thin plate boundary condition the feature is represented in the Modeller as a surface. This simplifies the modelling process and provides much faster solution times.


Thin Plate Boundary Condition


Prism Gap Meshing


Prism Gap MeshingThe Rotating Motional Electromagnetic solver has been updated with an improved automated remeshing algorithm. A new automated meshing technique creates prism elements in any prism shaped cells in the air gap. Meshing with prisms is fast and robust; the result is a big increase in solution speed.


3D Meshing


Mesh Type DialogThere is now a choice of mesh generators in the Opera-3d Modeller. Mesh generator Type II can create tetrahedral meshes in a wide variety of geometries. If the traditional mesher strategy encounters issues during the meshing process, the Type II generator can be used.


There are some special cases (e.g. filametrary conductors in circuits and multiple periodicities) for which the new mesh generator cannot yet be used. Mesh generator Type I can handle all those special cases and can also create mixed meshes including hexahedra, prisms and pyramids.

Space charge solution process improvements


Langmuir-Fry V-I tabulations are now stored in a local database file so that they can be re-used in other analysis runs or other cases in a single analysis. Once a tabulation has been calculated for a particular set of emitter parameters it will not be re-calculated for that emitter type. This can significantly speed up analyses where multiple models are run with identical emitter definitions.


Multi-core (Parallel) GUI operations


The Opera-3d CAD model import (with the LOAD command) now uses multiple threads.


In the Post-Processor multiple threads are used in two types of calculations:


  • Fields from conductors
  • Fields by integration




3D Machines Environment

Torque vs. Speed Analysis -

A new analysis has been added that evaluates the torque vs. speed profile of permanent magnet and synchronous reluctance machines. The existing analysis for Induction Machines has been extended to capture the complete torque characteristic of an Induction Machine.

Iron Loss calculations for SRMs

The existing iron loss calculations for synchronous machines have been adapted for SRMs in order to accurately account for losses in the machine.

Wound Synchronous Machines -
The generator- open circuit (Static) analysis provides a relationship between field current and induced voltage for all load conditions.
The generator- short circuit analysis provides a relationship between the armature current and the field current.
The generator - load analysis provides information about the generator operating point position in relation to the stability limit.






The existing Opera-2d Direct Sparse Solver option is now unlicensed. This entitles all supported users of Opera-2d to benefit from a shorter analysis time.


The interface to Simulink from Opera-2d and Opera-3d is no longer a separately licensed feature. All supported users of Opera on Windows systems now have access to the Simulink interface.


Documentation Update


The Reference Manuals have been updated to give details of the new commands and options within the software.


The Addition Support Knowledgebase (ASK)


The ASK has several new articles:


  • Calculation Time of Trajectories
  • Comi-Script with User Interactions
  • Converting $Const-$String-$Const
  • Debugging of Control-Comi-Files
  • Maximum Distance between Sample Rays
  • Parallel Solvers.
  • Conductors - Create your own Shapes
  • Eddy Current Losses in 3d
  • Measured Signals used in Circuit Editor
  • Parallel Solvers
  • Patch method to calculate Forces in 3d
  • Picking by Position
  • Replicating a 3-phase PWM Current Source
  • Using Opera to control Matlab®



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