Author Topic: Tesla coil in FEMM  (Read 149 times)

Offline Simranjit

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Tesla coil in FEMM
« on: July 08, 2024, 03:46:49 AM »
Hi, I have a few questions about FEMM and Tesla coil in general.
1) How to mirror axissymmetric in FEMM ( to get full view rather than just half view, I will attach some pictures) ?
2) Is it possible to test effect of primary coil on secondary coil (and possibly toroid also) ? Currently I'm testing only one coil at a time.
3) Is it possible to link it with LTSPICE (I know it sounds farfetched) to test primary coil with capacitor ?
4) Is it possible to test Tesla coil in FEMM with some frequency (currently I'm using 0 Hz) ?

Offline davekni

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Re: Tesla coil in FEMM
« Reply #1 on: July 08, 2024, 04:06:53 AM »
Quote
1) How to mirror axissymmetric in FEMM ( to get full view rather than just half view, I will attach some pictures) ?
2) Is it possible to test effect of primary coil on secondary coil (and possibly toroid also) ? Currently I'm testing only one coil at a time.
3) Is it possible to link it with LTSPICE (I know it sounds farfetched) to test primary coil with capacitor ?
4) Is it possible to test Tesla coil in FEMM with some frequency (currently I'm using 0 Hz) ?
1) No way I'm aware of within FEMM.  Perhaps I've missed an option.
2) Yes.  Make primary and secondary separate circuits.  Top load's effect on magnetic field is modeled too.  (Top load is a shorted turn.)  Resonance cannot be modeled in FEMM.  Transfer to LTSpice for that.  (FEE can model top load capacitance to provide input to LTSpice.)
3) Not directly.  Manually transfer inductances and coupling factor.
4) Yes.  Set problem to AC with specified frequency.
JavaTC is easier for most TC designing.  FEMM is useful for unusual geometries or other specific cases, induction heating, ...
If continuing with FEMM, read tutorial and manual.  FEMM user interface is somewhat awkward, but well documented.
David Knierim

Offline Simranjit

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Re: Tesla coil in FEMM
« Reply #2 on: July 08, 2024, 04:28:43 AM »
Quote
1) How to mirror axissymmetric in FEMM ( to get full view rather than just half view, I will attach some pictures) ?
2) Is it possible to test effect of primary coil on secondary coil (and possibly toroid also) ? Currently I'm testing only one coil at a time.
3) Is it possible to link it with LTSPICE (I know it sounds farfetched) to test primary coil with capacitor ?
4) Is it possible to test Tesla coil in FEMM with some frequency (currently I'm using 0 Hz) ?
1) No way I'm aware of within FEMM.  Perhaps I've missed an option.
2) Yes.  Make primary and secondary separate circuits.  Top load's effect on magnetic field is modeled too.  (Top load is a shorted turn.)  Resonance cannot be modeled in FEMM.  Transfer to LTSpice for that.  (FEE can model top load capacitance to provide input to LTSpice.)
3) Not directly.  Manually transfer inductances and coupling factor.
4) Yes.  Set problem to AC with specified frequency.
JavaTC is easier for most TC designing.  FEMM is useful for unusual geometries or other specific cases, induction heating, ...
If continuing with FEMM, read tutorial and manual.  FEMM user interface is somewhat awkward, but well documented.
I was also looking at Ansys Maxwell and ZWSoft as well. I know you can link circuits with models in one of them. For now, I will stick with FEMM Its pretty close to JAVATC when comparing results.
« Last Edit: July 08, 2024, 04:35:35 AM by Simranjit »

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Re: Tesla coil in FEMM
« Reply #2 on: July 08, 2024, 04:28:43 AM »

 


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