==================== Leiteranordnung (AC) ==================== Am Beispiel einer Leiteranordnung mit einem wirbelstromführenden Massivleiter wird die magnetodynamischen Berechnung (Fall f > 0) mit FSL veranschaulicht. :: Folgende Beispiele können im Skript ausgewählt werden: -- 30 = proximity effect in open conductors -- 31 = induced current in short cicuited conductors -- 32 = skin effect in a single conductor -- 33 = skin effect in a coil case = 31 **Bemerkungen** Die Randbedingungen sind physikalisch nicht sinnvoll, dieses Skript-Beispiel dient lediglich der Verdeutlichung. Wirbelstromdichte und Feldlinienverlauf im Falle offener Sekundärleiter (case = 30) .. image:: example13_30_ecurd.png .. image:: example13_30_fieldl.png Wirbelstromdichte und Feldlinienverlauf im Falle kurzgeschlossener Sekundärleiter (case = 31) .. image:: example13_31_ecurd.png .. image:: example13_31_fieldl.png .. role:: big :big:`Skript-Datei` ---------------------------------------------------------------------- :: -------------------------------------------------------------------------------- -- Allgemeine Einstellungen ---------------------------------------------------- -------------------------------------------------------------------------------- exit_on_error = true -- Verhalten nach Fehler exit_on_end = false -- Verhalten nach Skriptausfuehrung verbosity = 2 -- Grad der Bildschirmmeldungen tts = 1 -- minimum time to sleep between change of figures -- choose type of problem ------------------------------------------------------- -- magnetodynamic with massiv conductors f!=0, v=0 -- 30 = proximity effect in open conductors -- 31 = induced current in short cicuited conductors -- 32 = skin effect in a single conductor -- 33 = skin effect in a coil case = 31 -------------------------------------------------------------------------------- -- Modellerstellung ------------------------------------------------------------ -------------------------------------------------------------------------------- new_model_force("example13","FEMAG-AC FSL Example") global_unit('mm') -- Globale Einheit (m; cm; mm) pickdist(0.001) -- Abstand für Schnappen auf Knotenpunkt cosys('polar') -- Beszugssystem bA2 = 350 RLa = 20 RLi = 20 SW1 = 160 SW2 = 60 ndt(bA2/20) -- global node distance dn = 3 -- node distance of conductors nLa = math.ceil(2*math.pi*RLa/dn)+1 nLi = math.ceil(2*math.pi*RLi/dn)+1 x1 = bA2/2; y1 = 0.0; x4 = -SW1/2; y4 = 0; x6 = SW1/2; y6 = 0; x3 = -SW2/2; y3 = 0; x5 = SW2/2; y5 = 0; nc_circle(x1,y1,-x1,y1,0) nc_circle(-x1,y1,x1,y1,0) nc_circle_m(x3,y3,RLi,nLi) nc_circle_m(x4,y4,RLa,nLa) nc_circle_m(x5,y5,RLi,nLi) nc_circle_m(x6,y6,RLa,nLa) adapt_window() create_mesh() def_bcond_vpo(x1,y1,-x1,y1) def_bcond_vpo(-x1,y1,x1,y1) if case<32 or case>33 then Nc = 100 ff = 0.6 set_dev_data("cond_fillfact",ff*100,ff*100) wk1 = def_new_wdg(x4,y4,"cyan","Spule 1",Nc,0,wi) add_to_wdg(x6,y6,wsamekey,wo,wser) if case<=30 or case==31 or case==40 or case==50 then Jc = 4.5; Ic = math.pi*RLa^2*ff/Nc*Jc def_curr_wb(wk1,Ic,0) end end wk2 = def_new_bar(x3,y3,lightgrey,"Spule 2",0,0,wi,58e6,1.0,100) if case==30 or case==33 then add_to_bar(x5,y5,wsamekey,wo,wser) -- offener Spule end if case==31 or case==40 or case==50 then add_to_bar(x5,y5,wsamekey,wi,wpar) -- kurzgeschlosses Spule end if case==32 or case==33 then Jb = 4.5; Ib = math.pi*RLi^2*Jb def_curr_wb(wk2,Ib,0) end -------------------------------------------------------------------------------- -- Berechnen ------------------------------------------------------------------- -------------------------------------------------------------------------------- f1 = 100 -- max frequency N = 5 -- number of frequency steps state_of_problem("mag_static") f = 0 calc_field_single(1,actual,0.01) post_models("draw_f_lines","b") sleep(tts) state_of_problem("mag_dynamic") for i=1,N do color_gradation(0,0,"tot","ecurd",0,0,"") f = f1*i/N if case==21 or case==40 or case==50 then set_mat_velo(x3,y3,0,f/50*2*math.pi) set_mat_velo(x5,y5,0,f/50*2*math.pi) end calc_field_single(1,actual,0.01,f) post_models("draw_f_lines","b") save_metafile("field_lines_f.eps") sleep(tts) end color_gradation(0,0,"tot","ecurd",0,0,"ecurr_dens_f.eps") sleep(tts) --save_model('close')