<span style=" font-size:10pt;font-family:Arial">Hello everyone</span><br><br><span style=" font-size:10pt;font-family:sans-serif">I currently try
enlarge the machine model to include external connections. On of the aims
is to model a 3-phased diode rectifier (B6-Bridge) which uses 6 diodes
to rectify the incoming waveforms.</span><br><span style=" font-size:10pt;font-family:sans-serif">In the example
file </span><span style=" font-size:12pt"><b>Lib_Magnetodynamics2D_av_Cir.pro</b> </span><span style=" font-size:10pt;font-family:sans-serif">(</span><a href=https://gitlab.onelab.info/getdp/getdp/blob/master/templates/Lib_Magnetodynamics2D_av_Cir.pro><span style=" font-size:10pt;color:blue;font-family:sans-serif">https://gitlab.onelab.info/getdp/getdp/blob/master/templates/Lib_Magnetodynamics2D_av_Cir.pro</span></a><span style=" font-size:10pt;font-family:sans-serif">),
there's a hint/comment to use nonlinear resistors to simulate diodes.</span><br><span style=" font-size:10pt;font-family:sans-serif">Unfortunately
I coudln't find an exact example how to implement it.</span><br><br><span style=" font-size:10pt;font-family:sans-serif">Following three
lines are basically those related to the diodes out of the above example:</span><br><br><tt><span style=" font-size:12pt">Diode_Cir = Region[{}] ;</span></tt><span style=" font-size:12pt"></span><br><br><tt><span style=" font-size:12pt">GlobalTerm { NeverDt[ Dof{Uz} , {Iz}
]; In Diode_Cir; }<br>GlobalTerm { NeverDt[ Resistance[{Uz}] * Dof{Iz} , {Iz} ]; In Diode_Cir;
}<br></span></tt><br><span style=" font-size:10pt;font-family:sans-serif">According to my
understanding, the definition of such a resistance is missing. I simplified
the example to one diode.</span><br><span style=" font-size:10pt;font-family:sans-serif">I added the regions
and allocated it to the Diode_Cir.</span><br><br><tt><span style=" font-size:12pt">R_DIODE_1_A0 = Region[{1000012}];</span></tt><br><br><tt><span style=" font-size:12pt">Diode_Cir += Region[{R_DIODE_1_A0}];</span></tt><br><br><span style=" font-size:10pt;font-family:sans-serif">In the last step,
I set the dynamic resistance. In that case it's just the input voltage.</span><br><br><tt><span style=" font-size:12pt">Resistance[Region[{R_DIODE_1_A0}]]
= $1</span></tt><br><br><span style=" font-size:10pt;font-family:sans-serif">The program itself
successfully finishes. But basically all values are -nan, so something
runs badly wrong. When I replace $1 in the line above, through a fix number
(e.g. 10 ), the program behaves as it should.</span><br><span style=" font-size:10pt;font-family:sans-serif">So there's probably
still a mistake in the dynamic resistance calculation.</span><br><br><span style=" font-size:10pt;font-family:sans-serif">Any help is highly
appreciated. Thank you very much.</span><br><br><span style=" font-size:10pt;font-family:Arial">Mit freundlichen Grüssen</span><br><br><span style=" font-size:10pt;font-family:Arial">Andreas Eckert</span><br><span style=" font-size:10pt;font-family:Arial">Forschung und Entwicklung
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