Opera 16: Electromagnetic & Multiphysics Software for Designers
The latest version of Vector Fields Software's
electromagnetic and multiphysics simulation software suite, Opera
16, includes many significant new capabilities and enhancements.
These are summarised briefly below. Please see the new-features
document which is distributed with the software for more
- New Graphing Capability
- Functional Capacitors and Inductors in Circuits
- Machines Environments enhancements
- Automated Multiphysics
- Deformed Mesh input
- Parallel Solution
- SCALA Plasma
- Machines Environments - Synchronous Reluctance Machine
- Machines Environments - Switched Reluctance Machine
New Graphing Capability
Opera-2d and Opera-3d now
make use of a new common graphing capability. The graphing function
now works on the concept of buffers and lines being dynamically
added/displayed on a dedicated graphing pane. Each of the graphing
objects has a right-click context-sensitive menu allowing
appropriate commands to be executed on the object. A wealth of
properties can be adjusted by the user to assemble a graph to their
exact requirements, including:
- displayed text and fonts for title, axes labels, legend and
- scale type (linear or log10) and limits for axes;
- colours for lines, grid, axes, background and border;
- styles for lines and grids;
- symbol types and their size.
The previous graphing commands have been preserved for
compatibility with previous command input files.
Functional Capacitors and Inductors in Circuits
Opera-2d and Opera-3d incorporate a Circuit Editor to allow drive
circuits to be defined and solved as part of an electromagnetic
solution. The capacitors and inductors in those circuits can now be
functional, ie the values used for capacitance and inductance are
calculated during an analysis and can be dependent upon other
values calculated during the analysis.
Machines Environments Enhancements
Enhancements have made to some of the machine types in the
Opera-2d Machines Environment, including:
- Current Density Input - During preliminary
design, users are now able to input currents in windings using a
user defined maximum realistic current density (due to thermal
constraints) and then evaluate the winding current (and voltage in
- Average Torque - The average torque is
calculated by integration over the period and presented in the
- Active Mass - The active mass of the machine
is evaluated based on the user defined material density. The mass
evaluations can be used as constraints for the optimizer run.
- Average Flux Densities in Stator and Rotor -
The purpose of this is to determine if material is being underused
or, worse, subject to severe saturation. Average flux density is
calculated for the machine for different rotor positions, and the
flux density plot for the maximum average flux density case is
saved in the results folder.
Automated (chained) Multi-physics analysis has
been introduced in Opera-3d. This means that it is now possible to
use the Modeller to set up several analyses of the same model in a
single database and solve them in sequence.
The analyses can solve different physics types: electromagnetic,
thermal or stress. The results of one analysis will be used as the
data for subsequent analyses. Data such as material properties can
be updated using the output of the preceding analysis.
The existing method of multiphysics using table & command
files is still available.
Deformed Mesh Input
The deformed mesh from a stress analysis can be automatically used
in subsequent electromagnetic and thermal analyses in a chained
multiphysics analysis. In the required electromagnetic and/or
thermal analysis merely tick "Update mesh with displacements" in
the Analysis data dialog.
Multi-core Parallel processing is available for Opera-3d solvers.
This is controlled using a setting in the batch options, and is a
licensed feature. Contact your local representative for further
details on likely throughput improvements for your particular
Sputter Magnetron Coaters
A new volume plasma
emitter has been added that can be used to simulate the steady
state ion current flow from a magnetized plasma and used to
simulate sputter magnetron coaters.
The spatial distribution of the ionized gas created by the high
energy electrons is determined and the plasma density at the plasma
surface is then calculated. The position of the plasma surface is
determined by iteration; the change in electric fields produced by
the space charge of ion and electron flow outside the plasma is
recalculated at each iteration and the modified ionization rate is
then found. A self consistent voltage, ion and electron flow is
Machines Environments - Synchronous
A new machine template was added, which allows modelling of
synchronous reluctance machines. Two basic types of rotor
geometries were added; circular and trapezoidal rotor voids.
Machines Environments - Switched Reluctance Machine
New geometric details were added to
the definition of Switched Reluctance Machines in the Opera-3d
Machines Environment. In addition, two new analysis types were
- Magnetostatic - The magnetostatic analysis for
SRMs is split into three stages: the first stage creates a series
of static jobs for range of current with rotor aligned; the second
stage creates series of static jobs for different rotor positions
between the aligned and unaligned rotor positions; and the last
stage creates series of static jobs for range of current with rotor
unaligned. The magnetostatic analysis calculates flux linkage vs.
rotor position, flux linkage vs. current for aligned and unaligned
positions and torque vs. angle.
- Dynamic - The dynamic analysis for the switch
reluctance machine uses the mechanically coupled option. Based on
the geometry of the machine and on the number of phases selected,
the switching strategy is calculated. A hysteretic speed control is
implemented as a control strategy. The dynamic analysis calculates
torque vs. angle at a given speed and advance angle. It also
estimates the iron losses in the stator and or rotor sections.
information/detail on the latest features in Opera 16 please refer
to the New Features document, which is available from the Help menu
option in the Opera Manager.