Revision history for ReadMe42
Additions:
{{image url="/wiki/Images/files.xml?action=download&file=anim.gif" title="text" alt="text"}}
{{image url="/wiki/Images/files.xml?action=download&file=TorqueBenchmarkAnim.gif" title="text" alt="text"}}
{{image url="/wiki/Images/files.xml?action=download&file=TorqueBenchmarkAnim.gif" title="text" alt="text"}}
Deletions:
{{image url="http://www.femm.info/wiki/Images/files.xml?action=download&file=TorqueBenchmarkAnim.gif" title="text" alt="text"}}
Additions:
- Adds "incremental permeability" AC solver. An example application for this functionality is the analysis of the frequency-dependent impedance of speaker drivers about the DC operating point established by the speaker's permanent magnet. The DC operating point specified as the "Previous Solution" in the problem definition or via the mi_setprevious(filename,1) command in Lua.
Deletions:
Additions:
* Updated materials library for heat flow problems (thanks to Daniel Gheorghe). A detailed explanation of the updated values and their sources is at the [[SpecificHeat]] page.
Deletions:
Additions:
* Updated materials library for heat flow problems (thanks to Daniel Gheorghe). A detailed explanation of the updated values and their sources is at [[SpecificHeat]].
Deletions:
Additions:
**21Apr2019**
**06Oct2018: (Test Build)**
**06Oct2018: (Test Build)**
Deletions:
dmeeker@ieee.org
21Apr2019:
06Oct2018: (Test Build)
Additions:
==From 25Feb2018 Release==
Deletions:
Additions:
* Updated hard magnetic materials in magnetics materials library (thanks to Mike Devine). Includes new definitions for Sintered NdFeB, Bonded NdFeB, Sintered SmCo, and Alnico. See the explanatory web page [[HardMagneticMaterials]] for sources and rationale.
Deletions:
Additions:
* Start from previous solution for magnetics problems. To use this, specify a file name in "Previous Solution" edit box in the Problem Definition dialog. Specify the "Prev Type" to be "None". This works if the mesh has not changed from the last solution, for example, rotating problems using the "sliding band" boundary connecting the rotor and stator. These problems often involve consideration of a sequence of problems with slightly different rotor angles and currents. The "sliding band" approach lets the rotor move without modifying the mesh.
Deletions:
Additions:
* Start from previous solution for magnetics problems. To use this, specify a file name in "Previous Solution" edit box in the Problem Definition dialog. Specify the "Prev Type" to be "None". This works if the mesh has not changed from the last solution. Good rotating problems with the "sliding band" boundary connecting the rotor and stator. These problems often involve consideration of a sequence of problems with slightly different rotor angles and currents. The "sliding band" approach lets the rotor move without modifying the mesh.
Deletions:
boundary connecting the rotor and stator. These problems often involve consideration of a sequence of problems with slightly different rotor angles and currents. The "sliding band" approach lets the rotor move without modifying the mesh.
Additions:
=====FEMM 21Apr2019=====
FEMM 4.2 21Apr2019
dmeeker@ieee.org
21Apr2019:
* Start from previous solution for magnetics problems. To use this, specify a file name in "Previous Solution" edit box in the Problem Definition dialog. Specify the "Prev Type" to be "None". This works if the mesh has not changed from the last solution. Good rotating problems with the "sliding band"
boundary connecting the rotor and stator. These problems often involve consideration of a sequence of problems with slightly different rotor angles and currents. The "sliding band" approach lets the rotor move without modifying the mesh.
* Updated materials library for heat flow problems (thanks to Daniel Gheorghe)
* Updated hard magnetic materials in magnetics materials library (thanks to Mike Devine). Includes new definitions for Sintered NdFeB, Bonded NdFeB, Sintered SmCo, and Alnico. See explanatory webpages on femm.info for sources and rationale.
* Fixed precision in exported DXF so that no precision is lost in DXF exports.
* Changed the algorithm that identifies limits for plotting flux density so that exterior regions (both Kelvin Transformation and IABC) are not considered. These exterior regions can have high flux densities that mask the flux density variations in the interior region of interest.
06Oct2018: (Test Build)
* Fixed the cause of an occasional error that happens running many runs in Mathematica. Fkn.exe occasionally could not open a *.ans file to write over older results. The fix adds a retry if the file can't be opened.
* Fixed a bug with the computation of the "sliding band" incremental torque integral. The "previous solution" used to calculate the integral was not obtained correctly.
* For incremental runs, mesh temporary files never got deleted, leaving extra, spurious files hanging around. Code has been added to get rid of these files when they're not needed any more.
===From 25Feb2018 Release===
FEMM 4.2 21Apr2019
dmeeker@ieee.org
21Apr2019:
* Start from previous solution for magnetics problems. To use this, specify a file name in "Previous Solution" edit box in the Problem Definition dialog. Specify the "Prev Type" to be "None". This works if the mesh has not changed from the last solution. Good rotating problems with the "sliding band"
boundary connecting the rotor and stator. These problems often involve consideration of a sequence of problems with slightly different rotor angles and currents. The "sliding band" approach lets the rotor move without modifying the mesh.
* Updated materials library for heat flow problems (thanks to Daniel Gheorghe)
* Updated hard magnetic materials in magnetics materials library (thanks to Mike Devine). Includes new definitions for Sintered NdFeB, Bonded NdFeB, Sintered SmCo, and Alnico. See explanatory webpages on femm.info for sources and rationale.
* Fixed precision in exported DXF so that no precision is lost in DXF exports.
* Changed the algorithm that identifies limits for plotting flux density so that exterior regions (both Kelvin Transformation and IABC) are not considered. These exterior regions can have high flux densities that mask the flux density variations in the interior region of interest.
06Oct2018: (Test Build)
* Fixed the cause of an occasional error that happens running many runs in Mathematica. Fkn.exe occasionally could not open a *.ans file to write over older results. The fix adds a retry if the file can't be opened.
* Fixed a bug with the computation of the "sliding band" incremental torque integral. The "previous solution" used to calculate the integral was not obtained correctly.
* For incremental runs, mesh temporary files never got deleted, leaving extra, spurious files hanging around. Code has been added to get rid of these files when they're not needed any more.
===From 25Feb2018 Release===
Deletions:
===Additions to Latest Release===
Additions:
=====FEMM 25Feb2018=====
Deletions:
Additions:
=====FEMM=====
Deletions:
Additions:
===Additions to Latest Release===
==Rotor Motion Model==
In the 25Feb2018 version, a rotor motion model was added to FEMM. The rotor motion model is described in detain on the [[SlidingBand]] page. This functionality makes it possible to analyze a rotating machine at different rotor angles without changing the mesh. Smooth torque and voltage vs. rotor angle can be obtained from relatively coarsely meshed models.
//Rotor Motion Example 1//
An example application of the rotor motion model (animated in Figure 1 below) is given on the [[RotorMotion]] page. Performance is compared to a benchmark problem from the literature, and performance appears to be similar to that of a moving band approach with high-order elements inside the moving band.
{{image url="http://www.femm.info/wiki/Images/files.xml?action=download&file=anim.gif" title="text" alt="text"}}
Figure 1: Animation of rotor motion model example.
//Rotor Motion Example 2//
A second example is provided by the [[TorqueBenchmark]] page. Torque results from FEMM are compared to exact results for the case of torque on a bar magnet in a constant magnetic field. Agreement with the analytical solution is good.
{{image url="http://www.femm.info/wiki/Images/files.xml?action=download&file=TorqueBenchmarkAnim.gif" title="text" alt="text"}}
Figure 2: Solution for torque bench mark with a rotor angle of 45 degrees.
//Rotor Motion Example 3//
A reworked version of the script for computing loss in the laminations, magnets, and coils of a surface mount permanent magnet machine are now at the end of [[SPMLoss]]. In the reworked script, the mesh is the same for every time step, which eliminates a source of numerical noise in the original calculation. The script also no longer has to rotate the locations of the rotor elements, since the rotor is always pictured in a reference frame where the rotor looks stationary.
==Frozen Permeability / Incremental Permeability Solvers==
A 23Jun2016 test build is available with support for "Frozen Permeability" and "Incremental Permeability" formulations in DC Magnetics problems.
To link a problem to an existing solution (//i.e.// to automatically use the element-by-element permeabilities determined in a previous DC solution in a new DC solution), specify the name of the problem in the "Previous Solution" edit box in the problem properties. Pick "Incremental" or "Frozen" in the associated drop list, depending on what sort of problem is desired.
[[FrozenBenchmark Frozen Permeability Benchmark]] and [[FrozenTorqueSeparation Torque Separation]] examples are available.
The "incremental permeability" solution type essentially implements the hooks necessary to do transient problems using the methods described in:
E. Lange, F. Henrotte, and K. Hameyer, "[[http://134.130.107.200/uploads/bibliotest/2009ELLinearization.pdf An Efficient Field-Circuit Coupling Based on a Temporary Linearization of FE Electrical Machine Models]]", IEEE Transactions on Magnetics, 45(3):1258-1261, Mar 2009.
First, a nonlinear problem is solved at a particular nonlinear operating point (//i.e.// a particular set of instantaneous currents at a particular rotor orientation) Then, a linear, incremental problem based on the incremental permeabilities gleaned from the nonlinear operating point is solved for each phase where the phase of interest has a current of 1A and all other excitation is turned off. For each solution, the self inductance and the mutual inductances with all other phases are computed to generate one row of the incremental inductance matrix. Then, the "interaction torque" with the full nonlinear solution is computed to determine the back EMF voltage seen by the phase of interest. The development build contains a new torque integral that evaluates this interaction torque using the "weighted stress tensor" paradigm for good accuracy.
Looking at it another way, linearizing for small changes in current, \(i\), a very general equation that describes most rotating machines is: \[ L_{inc} \frac{di}{dt} + \omega \frac{d \psi}{d\theta} + R i = v \] where \(L_{inc}\) is the incremental inductance matrix gleaned by evaluation of inductance from the incremental permeability solutions; \(\frac{d \psi}{d\theta}\) is the change in flux linkage with respect to the change in rotor orientation gleaned by the evaluation of interaction force from the incremental permeability solutions; \(\theta\) represents the rotor orientation; and \(\omega\) is the change in \(\theta\) with respect to time. Matrix \(R\) is the phase resistance matrix (which is not necessarily evaluated by FEA and should contain resistance contributions from the end turns), and \(v\) is an externally applied voltage vector.
It should then be possible to include a direct link to FEMM in various transient simulation engines, by wrapping the above generalized model in in the "right way". In particular, I am interested in making a full transient simulation of a rotating electric machine that couples FEMM directly to Simulink. The Simscape Power Systems toolbox could be used for modeling the associated drive electronics.
==Visual Studio 2017==
The source code for FEMM development builds now compiles with either Visual Studio 2008 or Visual Studio 2017. Solution files are included in the source code distribution for both versions of Visual Studio (##femm43_VS2008.sln## and ##femm43_VS2017.sln##). To compile with Visual Studio Community 2017, you need to specify the optional Visual C""++"" and MFC components when you install Visual Studio.
===Release Notes===
==Rotor Motion Model==
In the 25Feb2018 version, a rotor motion model was added to FEMM. The rotor motion model is described in detain on the [[SlidingBand]] page. This functionality makes it possible to analyze a rotating machine at different rotor angles without changing the mesh. Smooth torque and voltage vs. rotor angle can be obtained from relatively coarsely meshed models.
//Rotor Motion Example 1//
An example application of the rotor motion model (animated in Figure 1 below) is given on the [[RotorMotion]] page. Performance is compared to a benchmark problem from the literature, and performance appears to be similar to that of a moving band approach with high-order elements inside the moving band.
{{image url="http://www.femm.info/wiki/Images/files.xml?action=download&file=anim.gif" title="text" alt="text"}}
Figure 1: Animation of rotor motion model example.
//Rotor Motion Example 2//
A second example is provided by the [[TorqueBenchmark]] page. Torque results from FEMM are compared to exact results for the case of torque on a bar magnet in a constant magnetic field. Agreement with the analytical solution is good.
{{image url="http://www.femm.info/wiki/Images/files.xml?action=download&file=TorqueBenchmarkAnim.gif" title="text" alt="text"}}
Figure 2: Solution for torque bench mark with a rotor angle of 45 degrees.
//Rotor Motion Example 3//
A reworked version of the script for computing loss in the laminations, magnets, and coils of a surface mount permanent magnet machine are now at the end of [[SPMLoss]]. In the reworked script, the mesh is the same for every time step, which eliminates a source of numerical noise in the original calculation. The script also no longer has to rotate the locations of the rotor elements, since the rotor is always pictured in a reference frame where the rotor looks stationary.
==Frozen Permeability / Incremental Permeability Solvers==
A 23Jun2016 test build is available with support for "Frozen Permeability" and "Incremental Permeability" formulations in DC Magnetics problems.
To link a problem to an existing solution (//i.e.// to automatically use the element-by-element permeabilities determined in a previous DC solution in a new DC solution), specify the name of the problem in the "Previous Solution" edit box in the problem properties. Pick "Incremental" or "Frozen" in the associated drop list, depending on what sort of problem is desired.
[[FrozenBenchmark Frozen Permeability Benchmark]] and [[FrozenTorqueSeparation Torque Separation]] examples are available.
The "incremental permeability" solution type essentially implements the hooks necessary to do transient problems using the methods described in:
E. Lange, F. Henrotte, and K. Hameyer, "[[http://134.130.107.200/uploads/bibliotest/2009ELLinearization.pdf An Efficient Field-Circuit Coupling Based on a Temporary Linearization of FE Electrical Machine Models]]", IEEE Transactions on Magnetics, 45(3):1258-1261, Mar 2009.
First, a nonlinear problem is solved at a particular nonlinear operating point (//i.e.// a particular set of instantaneous currents at a particular rotor orientation) Then, a linear, incremental problem based on the incremental permeabilities gleaned from the nonlinear operating point is solved for each phase where the phase of interest has a current of 1A and all other excitation is turned off. For each solution, the self inductance and the mutual inductances with all other phases are computed to generate one row of the incremental inductance matrix. Then, the "interaction torque" with the full nonlinear solution is computed to determine the back EMF voltage seen by the phase of interest. The development build contains a new torque integral that evaluates this interaction torque using the "weighted stress tensor" paradigm for good accuracy.
Looking at it another way, linearizing for small changes in current, \(i\), a very general equation that describes most rotating machines is: \[ L_{inc} \frac{di}{dt} + \omega \frac{d \psi}{d\theta} + R i = v \] where \(L_{inc}\) is the incremental inductance matrix gleaned by evaluation of inductance from the incremental permeability solutions; \(\frac{d \psi}{d\theta}\) is the change in flux linkage with respect to the change in rotor orientation gleaned by the evaluation of interaction force from the incremental permeability solutions; \(\theta\) represents the rotor orientation; and \(\omega\) is the change in \(\theta\) with respect to time. Matrix \(R\) is the phase resistance matrix (which is not necessarily evaluated by FEA and should contain resistance contributions from the end turns), and \(v\) is an externally applied voltage vector.
It should then be possible to include a direct link to FEMM in various transient simulation engines, by wrapping the above generalized model in in the "right way". In particular, I am interested in making a full transient simulation of a rotating electric machine that couples FEMM directly to Simulink. The Simscape Power Systems toolbox could be used for modeling the associated drive electronics.
==Visual Studio 2017==
The source code for FEMM development builds now compiles with either Visual Studio 2008 or Visual Studio 2017. Solution files are included in the source code distribution for both versions of Visual Studio (##femm43_VS2008.sln## and ##femm43_VS2017.sln##). To compile with Visual Studio Community 2017, you need to specify the optional Visual C""++"" and MFC components when you install Visual Studio.
===Release Notes===
No Differences
Additions:
- Added an "air gap boundary condition" that allows the rotor to be continuously moved without the mesh changing with rotor position. A number of new scripting functions have been added to calculate forces, torques, and field values of associated with an analytical solution in the air gap between the rotor and stator. Detailed examples to follow.
- Added file-by-file smartmesh attribute along with scripting commands for each input file type (mi_smartmesh, ei_smartmesh, hi_smartmesh, ci_smartmesh) to turn smartmesh on or off for a particular file. The global smartmesh scripting function still works to turn smartmesh on or off across all problem types for a particular session.
- Changed to Triangle 1.6 instead of Triangle 1.3. Version 1.6 is more robust and usually does not hang / crash if there are small angles in the input geometry.
- In cases where Triangle previously hung (displaying an error message) when an error occured, the program now terminates and indicates that an error has occured. This is especially useful for Matlab/Octave scripts, which now get passed the error indication rather than having the script hang on the meshing error.
- Fixed the problem of focus-stealing during script execution. This makes it possible to do other things while FEMM is running a long (Matlab/Octave or Mathematica) script.
- Added a new optional parameter to openfemm in Matlab/Octave/Mathematica and Scilab scripting. openfemm(1) starts FEMM fully minimized.
- Calls to the analysis (mi_analyze and friends) assume the state of the main window. For example, if a scripting run is started minimized with openfemm(1), subsequent mi_analyze() calls will also be run minimized automatically.
- Fixed SciFEMM interface so that it works with Scilab 6.0.0
- Fixed mi_attachdefault, ei_attachdefault, hi_attachdefault, and ci_attachdefault functions, which didn't work correctly.
- Added a "frozen permeability" problem type that can be used to split up field contributions between various excitation sources for nonlinear DC problems. Also extends the "incremental permeability" formulation to DC problems. The DC incremental results can be used as part of a general time-transient solver, essentially providing the derivatives of flux linkage with respect to incremental changes in current and with respect to small changes in position / orientation of moving parts.
- Dropped support for versions of Mathematica before version 5.0. Versions prior to 5.0 do not include .NET/Link for interprocess communications.
- Added file-by-file smartmesh attribute along with scripting commands for each input file type (mi_smartmesh, ei_smartmesh, hi_smartmesh, ci_smartmesh) to turn smartmesh on or off for a particular file. The global smartmesh scripting function still works to turn smartmesh on or off across all problem types for a particular session.
- Changed to Triangle 1.6 instead of Triangle 1.3. Version 1.6 is more robust and usually does not hang / crash if there are small angles in the input geometry.
- In cases where Triangle previously hung (displaying an error message) when an error occured, the program now terminates and indicates that an error has occured. This is especially useful for Matlab/Octave scripts, which now get passed the error indication rather than having the script hang on the meshing error.
- Fixed the problem of focus-stealing during script execution. This makes it possible to do other things while FEMM is running a long (Matlab/Octave or Mathematica) script.
- Added a new optional parameter to openfemm in Matlab/Octave/Mathematica and Scilab scripting. openfemm(1) starts FEMM fully minimized.
- Calls to the analysis (mi_analyze and friends) assume the state of the main window. For example, if a scripting run is started minimized with openfemm(1), subsequent mi_analyze() calls will also be run minimized automatically.
- Fixed SciFEMM interface so that it works with Scilab 6.0.0
- Fixed mi_attachdefault, ei_attachdefault, hi_attachdefault, and ci_attachdefault functions, which didn't work correctly.
- Added a "frozen permeability" problem type that can be used to split up field contributions between various excitation sources for nonlinear DC problems. Also extends the "incremental permeability" formulation to DC problems. The DC incremental results can be used as part of a general time-transient solver, essentially providing the derivatives of flux linkage with respect to incremental changes in current and with respect to small changes in position / orientation of moving parts.
- Dropped support for versions of Mathematica before version 5.0. Versions prior to 5.0 do not include .NET/Link for interprocess communications.
Deletions:
Added file-by-file smartmesh attribute along with scripting commands for each input file type (mi_smartmesh, ei_smartmesh, hi_smartmesh, ci_smartmesh) to turn smartmesh on or off for a particular file. The global smartmesh scripting function still works to turn smartmesh on or off across all problem types for a particular session.
Moved to console version of Triangle 1.6 made from directly compiling Triangle source rather than wrapping it with a dialog. Sometimes the dialog-wrapped version of Triangle 1.6 will not close properly, and it was easiest to fix by reverting to the console version.
03Dec2017: (Test Build)
Fixed one more focus-stealing hole that took away focus during Lua script execution. As noted at https://tinyurl.com/y9uggja3 the OnInitDialog functions of triangle.exe, fkn.exe, belasolv.exe, csolv.exe, and hsolve.exe must return FALSE instead of TRUE, or else focus might be stolen.
24Nov2017: (Test Build)
Changed to Triangle 1.6 instead of Triangle 1.3. Version 1.6 is more robust and usually does not hang / crash if there are small angles in the input geometry.
In cases where Triangle previously hung (displaying an error message) when an error occured, the program now terminates and indicates that an error has occured. This is especially useful for Matlab/Octave scripts, which now get passed the error indication rather than having the script hang on the meshing error.
Fixed a number of additional instances of focus-stealing during script execution. This makes it possible to do other things while FEMM is running a long (Matlab/Octave or Mathematica) script.
Added a new optional parameter to openfemm in Matlab/Octave/Mathematica and Scilab scripting. openfemm(1) starts FEMM fully minimized.
Calls to the analysis (mi_analyze and friends) assume the state of the main window. For example, if a scripting run is started minimized with openfemm(1), subsequent mi_analyze() calls will also be run minimized automatically.
Fixed SciFEMM interface so that it works with Scilab 6.0.0
24Sep2017: (Test Build)
Fixed mi_attachdefault, ei_attachdefault, hi_attachdefault, and ci_attachdefault functions, which didn't work correctly.
23Jun2016: (Test Build)
Fixed sign error with off-diagonal term in permeability tensor for incremental permeability problems.
14Jun2016: (Test Build)
Added a "frozen permeability" problem type that can be used to split up field contributions between various excitation sources for nonlinear DC problems. Also extends the "incremental permeability" formulation to DC problems. The DC incremental results can be used as part of a general time-transient solver, essentially providing the derivatives of flux linkage with respect to incremental changes in current and with respect to small changes in position / orientation of moving parts.
Dropped support for versions of Mathematica before version 5.0. Versions prior to 5.0 do not include .NET/Link for interprocess communications.
Additions:
**FEMM 4.2 25Feb2018**
Added an "air gap boundary condition" that allows the rotor to be continuously moved without the mesh changing with rotor position. A number of new scripting functions have been added to calculate forces, torques, and field values of associated with an analytical solution in the air gap between the rotor and stator. Detailed examples to follow.
Added file-by-file smartmesh attribute along with scripting commands for each input file type (mi_smartmesh, ei_smartmesh, hi_smartmesh, ci_smartmesh) to turn smartmesh on or off for a particular file. The global smartmesh scripting function still works to turn smartmesh on or off across all problem types for a particular session.
Moved to console version of Triangle 1.6 made from directly compiling Triangle source rather than wrapping it with a dialog. Sometimes the dialog-wrapped version of Triangle 1.6 will not close properly, and it was easiest to fix by reverting to the console version.
03Dec2017: (Test Build)
Fixed one more focus-stealing hole that took away focus during Lua script execution. As noted at https://tinyurl.com/y9uggja3 the OnInitDialog functions of triangle.exe, fkn.exe, belasolv.exe, csolv.exe, and hsolve.exe must return FALSE instead of TRUE, or else focus might be stolen.
24Nov2017: (Test Build)
Changed to Triangle 1.6 instead of Triangle 1.3. Version 1.6 is more robust and usually does not hang / crash if there are small angles in the input geometry.
In cases where Triangle previously hung (displaying an error message) when an error occured, the program now terminates and indicates that an error has occured. This is especially useful for Matlab/Octave scripts, which now get passed the error indication rather than having the script hang on the meshing error.
Fixed a number of additional instances of focus-stealing during script execution. This makes it possible to do other things while FEMM is running a long (Matlab/Octave or Mathematica) script.
Added a new optional parameter to openfemm in Matlab/Octave/Mathematica and Scilab scripting. openfemm(1) starts FEMM fully minimized.
Calls to the analysis (mi_analyze and friends) assume the state of the main window. For example, if a scripting run is started minimized with openfemm(1), subsequent mi_analyze() calls will also be run minimized automatically.
Fixed SciFEMM interface so that it works with Scilab 6.0.0
24Sep2017: (Test Build)
Fixed mi_attachdefault, ei_attachdefault, hi_attachdefault, and ci_attachdefault functions, which didn't work correctly.
23Jun2016: (Test Build)
Fixed sign error with off-diagonal term in permeability tensor for incremental permeability problems.
14Jun2016: (Test Build)
Added a "frozen permeability" problem type that can be used to split up field contributions between various excitation sources for nonlinear DC problems. Also extends the "incremental permeability" formulation to DC problems. The DC incremental results can be used as part of a general time-transient solver, essentially providing the derivatives of flux linkage with respect to incremental changes in current and with respect to small changes in position / orientation of moving parts.
Dropped support for versions of Mathematica before version 5.0. Versions prior to 5.0 do not include .NET/Link for interprocess communications.
Added an "air gap boundary condition" that allows the rotor to be continuously moved without the mesh changing with rotor position. A number of new scripting functions have been added to calculate forces, torques, and field values of associated with an analytical solution in the air gap between the rotor and stator. Detailed examples to follow.
Added file-by-file smartmesh attribute along with scripting commands for each input file type (mi_smartmesh, ei_smartmesh, hi_smartmesh, ci_smartmesh) to turn smartmesh on or off for a particular file. The global smartmesh scripting function still works to turn smartmesh on or off across all problem types for a particular session.
Moved to console version of Triangle 1.6 made from directly compiling Triangle source rather than wrapping it with a dialog. Sometimes the dialog-wrapped version of Triangle 1.6 will not close properly, and it was easiest to fix by reverting to the console version.
03Dec2017: (Test Build)
Fixed one more focus-stealing hole that took away focus during Lua script execution. As noted at https://tinyurl.com/y9uggja3 the OnInitDialog functions of triangle.exe, fkn.exe, belasolv.exe, csolv.exe, and hsolve.exe must return FALSE instead of TRUE, or else focus might be stolen.
24Nov2017: (Test Build)
Changed to Triangle 1.6 instead of Triangle 1.3. Version 1.6 is more robust and usually does not hang / crash if there are small angles in the input geometry.
In cases where Triangle previously hung (displaying an error message) when an error occured, the program now terminates and indicates that an error has occured. This is especially useful for Matlab/Octave scripts, which now get passed the error indication rather than having the script hang on the meshing error.
Fixed a number of additional instances of focus-stealing during script execution. This makes it possible to do other things while FEMM is running a long (Matlab/Octave or Mathematica) script.
Added a new optional parameter to openfemm in Matlab/Octave/Mathematica and Scilab scripting. openfemm(1) starts FEMM fully minimized.
Calls to the analysis (mi_analyze and friends) assume the state of the main window. For example, if a scripting run is started minimized with openfemm(1), subsequent mi_analyze() calls will also be run minimized automatically.
Fixed SciFEMM interface so that it works with Scilab 6.0.0
24Sep2017: (Test Build)
Fixed mi_attachdefault, ei_attachdefault, hi_attachdefault, and ci_attachdefault functions, which didn't work correctly.
23Jun2016: (Test Build)
Fixed sign error with off-diagonal term in permeability tensor for incremental permeability problems.
14Jun2016: (Test Build)
Added a "frozen permeability" problem type that can be used to split up field contributions between various excitation sources for nonlinear DC problems. Also extends the "incremental permeability" formulation to DC problems. The DC incremental results can be used as part of a general time-transient solver, essentially providing the derivatives of flux linkage with respect to incremental changes in current and with respect to small changes in position / orientation of moving parts.
Dropped support for versions of Mathematica before version 5.0. Versions prior to 5.0 do not include .NET/Link for interprocess communications.
Additions:
**FEMM 4.2 12Jan2016**
- Fixes bug added in 01Nov2015 that messed up the reported permeability and field intensity for nonlinear time harmonic problems.
- Fixes bug added in 01Nov2015 that messed up the reported permeability and field intensity for nonlinear time harmonic problems.
Additions:
- Change to ""InTriangle"" test to fix the issues that could occur if a specified point is exactly on the line between two elements
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named ""SmartMesh"" in the Mathematica implementation
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of ""MathLink""). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named ""SmartMesh"" in the Mathematica implementation
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of ""MathLink""). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
Deletions:
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named SmartMesh in the Mathematica implementation
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
Additions:
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named SmartMesh in the Mathematica implementation
- Fixed bug where "mo_zoom", "eo_zoom", etc. didn't work right
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
- Fixed bug where "mo_zoom", "eo_zoom", etc. didn't work right
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
Deletions:
- Fixed bug where "mo_zoom", "eo_zoom", etc. didn't work right
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
Additions:
- Fixed an issue where the right energy / flux linkage was not reported for wound coils in AC magnetic problems if the frequency is very small (e.g. <1μHz)
Deletions:
Additions:
**FEMM 4.2 01Nov2015**
- Adds "incremental permeability" AC solver. An example application for this functionality is the analysis of the frequency-dependent impedance of speaker drivers about the DC operating point established by the speaker's permanent magnet. The DC operating point specified as the "Previous Solution" in the problem definition or via the mi_setprevious(filename) command in Lua.
- Adds 10% and 15% Copper Clad Aluminum magnet wire material types. The material definition is intended to provide accurate estimates of proximity and skin effect losses across a wide range of frequencies with a bulk wire model (i.e. not every turn has to be individually modeled).
- Change to InTriangle test to fix the issues that could occur if a specified point is exactly on the line between two elements
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named SmartMesh in the Mathematica implementation
- Fixed bug where "mo_zoom", "eo_zoom", etc. didn't work right
- Fixed an issue where the right energy / flux linkage was not reported for wound coils in AC magnetic problems if the frequency is very small (e.g. <1μHz)
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
- Adds "incremental permeability" AC solver. An example application for this functionality is the analysis of the frequency-dependent impedance of speaker drivers about the DC operating point established by the speaker's permanent magnet. The DC operating point specified as the "Previous Solution" in the problem definition or via the mi_setprevious(filename) command in Lua.
- Adds 10% and 15% Copper Clad Aluminum magnet wire material types. The material definition is intended to provide accurate estimates of proximity and skin effect losses across a wide range of frequencies with a bulk wire model (i.e. not every turn has to be individually modeled).
- Change to InTriangle test to fix the issues that could occur if a specified point is exactly on the line between two elements
- Lua command to programmatically turn off "smart mesh" with the smartmesh(state) Lua command. State is 0 for no "smart mesh" and 1 for "smart mesh". Function has the same name in the Matlab interface and is named SmartMesh in the Mathematica implementation
- Fixed bug where "mo_zoom", "eo_zoom", etc. didn't work right
- Fixed an issue where the right energy / flux linkage was not reported for wound coils in AC magnetic problems if the frequency is very small (e.g. <1μHz)
- For increased compatibility with Mathematica 10, the Mathematica interface has been changed to use .NET/Link when it is available (instead of MathLink). .NET/Link invokes FEMM as an out-of-proc ActiveX server (the same way that FEMM communicates with Matlab).
Additions:
- Fixed instances of ""GetWindowLong"" and ""SetWindowLong"" which caused the x64 build to crash when running on Linux via Wine. (see [[http://bugs.winehq.org/show_bug.cgi?id=34868 http://bugs.winehq.org/show_bug.cgi?id=34868]])
Deletions:
Additions:
- Changed the way that errors are trapped in Matlab/Octave and Scilab implementations so that errors that would normally display as message boxes in a normal GUI session instead get returned as errors to Matlab/Octave or Scilab. Errors can then be trapped, e.g. by using a try/catch block.
- Fixed instances of GetWindowLong and SetWindowLong which caused the x64 build to crash when running on Linux via Wine. (see [[http://bugs.winehq.org/show_bug.cgi?id=34868 http://bugs.winehq.org/show_bug.cgi?id=34868]])
- Fixes to eo_blockintegral and co_blockintegral functions. Previously wouldn't allow integration (e.g. for Weighted Stress Tensor force) if the only selected area was a conductor surface.
- Fixed instances of GetWindowLong and SetWindowLong which caused the x64 build to crash when running on Linux via Wine. (see [[http://bugs.winehq.org/show_bug.cgi?id=34868 http://bugs.winehq.org/show_bug.cgi?id=34868]])
- Fixes to eo_blockintegral and co_blockintegral functions. Previously wouldn't allow integration (e.g. for Weighted Stress Tensor force) if the only selected area was a conductor surface.
Deletions:
Additions:
**FEMM 4.2 15Nov2013**
- Incorporates Resizablelib version 1.3 to address [[http://bugs.winehq.org/show_bug.cgi?id=34868 http://bugs.winehq.org/show_bug.cgi?id=34868]]
- Incorporates Resizablelib version 1.3 to address [[http://bugs.winehq.org/show_bug.cgi?id=34868 http://bugs.winehq.org/show_bug.cgi?id=34868]]
Additions:
- Added new "Improvised Asymptotic Boundary Condition" button, and mi_makeABC and friends Lua functions, analogous Octave/Matlab, Mathematica, and Scilab functions, as an alternate way of solving unbounded problems.
Deletions:
Additions:
**FEMM 4.2 25Aug2013**
- Added mi_selectcircle, mi_selectrectangle and friends to programmatically select regions.
- Changed .dxf import so that objects assigned to layers are imported as being in the same group.
- Added new "Improvised Asymptotic Boundary Condition" button and mi_makeABC and friends Lua funtions as an alternate way of solving unbounded problems.
- Added mi_selectcircle, mi_selectrectangle and friends to programmatically select regions.
- Changed .dxf import so that objects assigned to layers are imported as being in the same group.
- Added new "Improvised Asymptotic Boundary Condition" button and mi_makeABC and friends Lua funtions as an alternate way of solving unbounded problems.
Additions:
**FEMM 4.2 11Apr2012** with installer fix
Deletions:
Additions:
**FEMM 4.2 11Apr2012** with 10May2012 installer fix
Deletions:
Additions:
- Functionally identical to 11Apr2012, but fixes a bug in the installer where registry keys the ActiveX interface (part of the infrastructure for Matlab, Octave, and Scilab) were not created properly. I'd inadvertently re-introduced [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=14 Bug 14]].
Deletions:
Additions:
**FEMM 4.2 10May2012**
- Functionally identical to 11Apr2012, but fixes a bug in the installer where registry keys the ActiveX interface (part of the infrastructure for Matlab, Octave, and Scilab) were not created properly. I'd inadvertently re-introduced [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=14 Bug 14]]--whoops!
- Functionally identical to 11Apr2012, but fixes a bug in the installer where registry keys the ActiveX interface (part of the infrastructure for Matlab, Octave, and Scilab) were not created properly. I'd inadvertently re-introduced [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=14 Bug 14]]--whoops!
Additions:
- Fixed problem with running with 64-bit Scilab described as [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=16 Bug 16]] in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]]. Now, FEMM 32-bit works with Scilab 32-bit on ""Win7"" 32-bit, and FEMM 64-bit works with Scilab 64-bit on ""Win7"" 64-bit.
Deletions:
Additions:
- Fixed problem with running with 64-bit Scilab described as [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=16 Bug 16]] in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]]. Now, FEMM 32-bit works with Scilab 32-bit on Win7 32-bit, and FEMM 64-bit works with Scilab 64-bit on Win7 64-bit.
Deletions:
Additions:
- Fixed mi_readdxf problem described as [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=18 Bug 18]] in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]].
Deletions:
Additions:
- Fixed problem with running with 64-bit Scilab described as [[http://www.femm.info/fireant/index.php?page=bug_show&bug_id=16 Bug 16]] in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]].
Deletions:
Additions:
- Fixed problem with running with 64-bit Scilab described as Bug 18 in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]].
Additions:
**FEMM 4.2 11Apr2012**
- Can turn off "smart meshing" via a Preferences selection on the "General Attributes" tab by unchecking "use smart meshing"
- Fixed a newly introduced bug where an erroneous resistive loss is computed for AC problems in regions where conductivity = 0
- Fixed mi_readdxf problem described as Bug 18 in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]].
- Can turn off "smart meshing" via a Preferences selection on the "General Attributes" tab by unchecking "use smart meshing"
- Fixed a newly introduced bug where an erroneous resistive loss is computed for AC problems in regions where conductivity = 0
- Fixed mi_readdxf problem described as Bug 18 in the [[http://www.femm.info/wiki/BugTracker Bug Tracker]].
Additions:
**FEMM 4.2 01Oct2011**
- Fixed error in reported flux linkage. Flux linkage for stranded regions carrying zero current is not reported correctly for AC problems.
- The Lua "format" command did not work properly with complex number--it stripped off the imaginary part of the number. This is now fixed.
- The units reported for some heat flow block integral results were erroneous. This has now been rectified.
- 64-bit version of FEMM 4.2 is now available.
- FEMM has been modified to allow multiple instance of FEMM to run at the same time via ActiveX. For example, This allows multiple instance of FEMM to be controlled by one instance of Matlab or Octave.
- FEMM 42 09Nov2010 asks for Mathematica integration when using the silent install method. The installer script has been modified so that the silent install assumes that Mathematica is not available, letting the installation complete without requiring operator intervention.
- Default material. A feature has been added which allows one block label to be designated as the default block label. Any unlabeled blocks are then assumed to be tagged by the default block label.
- In the current flow problem type, line plots of quantities normal and tangential to a user-define contour were messed up because the normal and tangential directions were computed incorrectly. This is now fixed.
- The "default" mesh size has been changed. In previous builds, using the default mesh size nearly always resulted in a mesh that was too coarse to give accurate results. The default mesh size has been changed so that specifying the default mesh size is adequate for most applications. Note: can use the <F3> and <F4> keys to uniformly refine and coarsen the mesh for the entire model with one keystroke.
- Added automatic refinement of the mesh near corners. This refinement improves convergence of results like force, stored energy, etc.
- Changed the way that the maximum flux density is computed for flux density plotting purposes. With the automatic refinement of corners, small elements with high flux densities can appear in corners. The modified algorithm discounts these small corner elements when picking a maximum for the purposes of picking plot contours.
- Changed the key that is used to break out of Lua scripts to ESC from BREAK. Many keyboards don't have a BREAK key anymore, so it made sense to make this change.
- Changed the selection rectangle to a dotted line so that it would render faster.
- Modified the DXF import to understand closed POLYLINE entities. Previously, only open POLYLINE entities were supported.
- Fixed problem with functionality that creates rounded corners (i.e. the functionality invoked by mi_createradius) where the program would not allow a radius to be created if the intersection was between a line segment and an arc segment if the line segment laid along a ling that passed through the center of the circle associated with the arc segment.
- Default install directory changed to c:\femm42 to avoid directory permissions problems in Windows 7.
- Fixed error in reported flux linkage. Flux linkage for stranded regions carrying zero current is not reported correctly for AC problems.
- The Lua "format" command did not work properly with complex number--it stripped off the imaginary part of the number. This is now fixed.
- The units reported for some heat flow block integral results were erroneous. This has now been rectified.
- 64-bit version of FEMM 4.2 is now available.
- FEMM has been modified to allow multiple instance of FEMM to run at the same time via ActiveX. For example, This allows multiple instance of FEMM to be controlled by one instance of Matlab or Octave.
- FEMM 42 09Nov2010 asks for Mathematica integration when using the silent install method. The installer script has been modified so that the silent install assumes that Mathematica is not available, letting the installation complete without requiring operator intervention.
- Default material. A feature has been added which allows one block label to be designated as the default block label. Any unlabeled blocks are then assumed to be tagged by the default block label.
- In the current flow problem type, line plots of quantities normal and tangential to a user-define contour were messed up because the normal and tangential directions were computed incorrectly. This is now fixed.
- The "default" mesh size has been changed. In previous builds, using the default mesh size nearly always resulted in a mesh that was too coarse to give accurate results. The default mesh size has been changed so that specifying the default mesh size is adequate for most applications. Note: can use the <F3> and <F4> keys to uniformly refine and coarsen the mesh for the entire model with one keystroke.
- Added automatic refinement of the mesh near corners. This refinement improves convergence of results like force, stored energy, etc.
- Changed the way that the maximum flux density is computed for flux density plotting purposes. With the automatic refinement of corners, small elements with high flux densities can appear in corners. The modified algorithm discounts these small corner elements when picking a maximum for the purposes of picking plot contours.
- Changed the key that is used to break out of Lua scripts to ESC from BREAK. Many keyboards don't have a BREAK key anymore, so it made sense to make this change.
- Changed the selection rectangle to a dotted line so that it would render faster.
- Modified the DXF import to understand closed POLYLINE entities. Previously, only open POLYLINE entities were supported.
- Fixed problem with functionality that creates rounded corners (i.e. the functionality invoked by mi_createradius) where the program would not allow a radius to be created if the intersection was between a line segment and an arc segment if the line segment laid along a ling that passed through the center of the circle associated with the arc segment.
- Default install directory changed to c:\femm42 to avoid directory permissions problems in Windows 7.
Additions:
- There are no changes to the FEMM binaries vs. 11Oct2010, but a set of Scilab functions for interfacing with FEMM has been added. These functions were tested using Scilab 5.2.2. The descriptions of these functions are identical to those described in the OctaveFEMM documentation. Example Scilab scripts are in the femm42/examples directory of the FEMM distribution and have a .sce file extension and can be run by typing: ""<p><tt>exec('examplename.sce',-1)</tt></p>"" at the Scilab command line. If you did not install FEMM to the default c:\Program Files\femm42 directory, you'll need to change the first line of the *.sce files that loads the FEMM library so that it points to the correct library location.
- Incorporates ComplexLua, a modified version of the Lua scripting language in which the default number type is complex (rather than double). Modifications resulting from this change are:
- Incorporates ComplexLua, a modified version of the Lua scripting language in which the default number type is complex (rather than double). Modifications resulting from this change are:
Deletions:
- Incorporates ComplexLua, a modified verison of the Lua scripting language in which the default number type is complex (rather than double). Modifications resulting from this change are:
Revision [413]
Edited on 2010-11-09 19:10:33 by DavidMeeker [Updated for 09Nov2010 build w/ Scilab support]Additions:
The distribution also includes the OctaveFEMM, SciFEMM, and MathFEMM toolboxes for interfacing Octave/Matlab, Scilab, and Mathematica to FEMM. See the documentation in FEMM 4.2 folder of your Start menu for more details.
**FEMM 4.2 09Nov2010**
- There are no changes to the FEMM binaries vs. 11Oct2010, but a set of Scilab functions for interfacing with FEMM has been added. These functions were tested using Scilab 5.2.2. The descriptions of these functions are identical to those described in the OctaveFEMM documentation. Example Scilab scripts are in the femm42/examples directory of the FEMM distribution and have a .sce file extension and can be run by typing: ""<p><tt>exec('examplename.sce',-1)</tt></p>"" at the Scilab commandline. If you did not install FEMM to the default c:\Program Files\femm42 directory, you'll need to change the first line of the *.sce files that loads the FEMM library so that it points to thecorrect library location.
**FEMM 4.2 09Nov2010**
- There are no changes to the FEMM binaries vs. 11Oct2010, but a set of Scilab functions for interfacing with FEMM has been added. These functions were tested using Scilab 5.2.2. The descriptions of these functions are identical to those described in the OctaveFEMM documentation. Example Scilab scripts are in the femm42/examples directory of the FEMM distribution and have a .sce file extension and can be run by typing: ""<p><tt>exec('examplename.sce',-1)</tt></p>"" at the Scilab commandline. If you did not install FEMM to the default c:\Program Files\femm42 directory, you'll need to change the first line of the *.sce files that loads the FEMM library so that it points to thecorrect library location.
Deletions:
Revision [404]
Edited on 2010-10-15 23:13:39 by DavidMeeker [Release notes for 11Oct2010 build added to ReadMe]Additions:
**FEMM 4.2 11Oct2010**
- Fixed bug in values of |H| reported in the Output Window for time harmonic magnetic problems.
- Fixed bug where in some plots, units of H given as A/m^2 instead of A/m
- Fixed error in mo_showvectorplot Matlab/Octave function. Also fixed similar errors in co_showvectorplot, ho_showvectorplot, eo_showvectorplot
- Fixed messed-up definitions of the Lua functions ei_defineouterspace, ei_attachouterspace, and ei_detachouterspace
- Installer now prompts for whether or not Mathetmatica support is to be included. If Mathematica support is selected, a version of FEMM is installed that assumes the availability of ML32I2.DLL, a DLL installed by Mathematica. Otherwise, a version of FEMM is installed that doesn't need the Mathlink DLL.
- Re-wrote the ""GetIntersection"" routine that finds intersections between two line segments. In some uncommon circumstances, the routine could create extra points when the geometry was moved or rotated.
- Added extra Lua functions mi_getmaterial, ei_getmaterial, hi_getmaterial, and ci_getmaterial to fetch material definitions from the materials library on disk. Analogous functions were also added to the Matlab/Octave and Mathematica interfaces.
- Fixed bug in values of |H| reported in the Output Window for time harmonic magnetic problems.
- Fixed bug where in some plots, units of H given as A/m^2 instead of A/m
- Fixed error in mo_showvectorplot Matlab/Octave function. Also fixed similar errors in co_showvectorplot, ho_showvectorplot, eo_showvectorplot
- Fixed messed-up definitions of the Lua functions ei_defineouterspace, ei_attachouterspace, and ei_detachouterspace
- Installer now prompts for whether or not Mathetmatica support is to be included. If Mathematica support is selected, a version of FEMM is installed that assumes the availability of ML32I2.DLL, a DLL installed by Mathematica. Otherwise, a version of FEMM is installed that doesn't need the Mathlink DLL.
- Re-wrote the ""GetIntersection"" routine that finds intersections between two line segments. In some uncommon circumstances, the routine could create extra points when the geometry was moved or rotated.
- Added extra Lua functions mi_getmaterial, ei_getmaterial, hi_getmaterial, and ci_getmaterial to fetch material definitions from the materials library on disk. Analogous functions were also added to the Matlab/Octave and Mathematica interfaces.
Revision [338]
Edited on 2009-11-02 20:51:51 by DavidMeeker [Release notes for 11Oct2010 build added to ReadMe]Additions:
**FEMM 4.2 02Nov2009**
- Added the Lua commands mi_setgroup, ei_setgroup, hi_setgroup, ci_setgroup that assign all selected items to the group number specified by the argument to the function.
- Fixed a bug that caused an incorrect permeability to be reported for nonlinear materials at points where the flux density is less than 10nT.
- Fixed bugs with ci_addconductor and ci_modifyconductor Lua functions.
- Fixed bug with ""CIAddMaterial"" function in MathFEMM
- Added the Lua commands mi_setgroup, ei_setgroup, hi_setgroup, ci_setgroup that assign all selected items to the group number specified by the argument to the function.
- Fixed a bug that caused an incorrect permeability to be reported for nonlinear materials at points where the flux density is less than 10nT.
- Fixed bugs with ci_addconductor and ci_modifyconductor Lua functions.
- Fixed bug with ""CIAddMaterial"" function in MathFEMM