Saturated core transformer sim

transformer.asc

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+Version 4
+SHEET 1 1684 804
+WIRE 1200 -48 1120 -48
+WIRE 1568 -48 1488 -48
+WIRE 1120 0 1120 -48
+WIRE 1200 0 1200 -48
+WIRE 1488 0 1488 -48
+WIRE 1568 0 1568 -48
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+WIRE -32 32 -80 32
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+WIRE 816 32 640 32
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+WIRE 512 96 496 96
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+WIRE 320 528 144 528
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+WIRE 640 608 480 608
+WIRE 176 656 16 656
+WIRE 640 656 480 656
+WIRE -80 720 -80 336
+WIRE 16 720 16 656
+WIRE 16 720 -80 720
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+WIRE 320 736 320 720
+WIRE 816 736 816 720
+FLAG 320 352 0
+FLAG 320 736 0
+FLAG 816 352 0
+FLAG 816 736 0
+FLAG -224 352 0
+FLAG -80 32 Vprim
+FLAG 1120 112 0
+FLAG 1200 112 0
+FLAG 1488 112 0
+FLAG 1568 112 0
+FLAG 1200 -48 B
+FLAG 1568 -48 H
+SYMBOL g 96 64 M0
+SYMATTR InstName G1
+SYMATTR Value 1
+SYMBOL g 224 192 R0
+SYMATTR InstName G2
+SYMATTR Value 1
+SYMBOL g2 560 176 M180
+SYMATTR InstName G4
+SYMATTR Value {Ns}
+SYMBOL g2 432 304 R180
+SYMATTR InstName G5
+SYMATTR Value {Ns}
+SYMBOL res 304 32 R0
+SYMATTR InstName R1
+SYMATTR Value 10Meg
+SYMBOL ind -96 112 R0
+WINDOW 3 85 -179 Left 2
+SYMATTR InstName L1
+SYMATTR Value Hc=28.65 Bs=0.35 Br=0.22 A={A} Lm={Lm} Lg={Lg} N={N}
+SYMBOL g 96 448 M0
+SYMATTR InstName G3
+SYMATTR Value 1
+SYMBOL g 224 576 R0
+SYMATTR InstName G6
+SYMATTR Value 1
+SYMBOL g2 560 560 M180
+SYMATTR InstName G7
+SYMATTR Value {Nf}
+SYMBOL g2 432 688 R180
+SYMATTR InstName G8
+SYMATTR Value {Nf}
+SYMBOL res 304 416 R0
+SYMATTR InstName R2
+SYMATTR Value 10Meg
+SYMBOL res 800 512 R0
+SYMATTR InstName R3
+SYMATTR Value 10Meg
+SYMBOL res 800 112 R0
+SYMATTR InstName R4
+SYMATTR Value 10Meg
+SYMBOL voltage -224 128 R0
+WINDOW 3 -297 17 Left 2
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V1
+SYMATTR Value SINE(0 1 1000 0 0 0)
+SYMBOL res -96 16 R90
+WINDOW 0 0 56 VBottom 2
+WINDOW 3 32 56 VTop 2
+SYMATTR InstName R5
+SYMATTR Value 10m
+SYMBOL res 1184 -16 R0
+SYMATTR InstName R6
+SYMATTR Value 1
+SYMBOL bv 1120 -16 R0
+WINDOW 3 -72 175 Left 2
+SYMATTR InstName B1
+SYMATTR Value V=idt(v(vprim))/(A*N)
+SYMBOL res 1552 -16 R0
+SYMATTR InstName R7
+SYMATTR Value 1
+SYMBOL bv 1488 -16 R0
+WINDOW 3 -47 169 Left 2
+SYMATTR InstName B2
+SYMATTR Value V=I(L1)*(N/Le)
+TEXT -16 -184 Left 2 !.param Ns=1 Nf=1
+TEXT -16 -640 Left 2 !.tran 0 150m 100m 10u
+TEXT -16 -480 Left 2 !.param N 20
+TEXT 1152 -120 Left 2 ;B
+TEXT -16 -264 Left 2 !.param A 0.0000129
+TEXT -16 -408 Left 2 !.param Lg 0
+TEXT -16 -336 Left 2 !.param Lm 0.0295
+TEXT 392 -408 Left 2 ;Gap length
+TEXT 392 -344 Left 2 ;In core length
+TEXT 392 -264 Left 2 ;Area
+TEXT 392 -480 Left 2 ;Turns
+TEXT 1520 -120 Left 2 ;H
+TEXT 744 -688 Left 2 !.param Le={Lg+Lm}
+RECTANGLE Normal 736 384 -16 -16 2
+RECTANGLE Normal 736 800 -16 400 2
+RECTANGLE Normal 1664 208 1008 -160 2
+RECTANGLE Normal 576 -144 -80 -512 2
+CIRCLE Normal 720 16 704 0 2
+CIRCLE Normal 720 448 704 432 2
+CIRCLE Normal 16 16 0 0 2

transformer.log

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+LTspice 24.0.9 for Windows
+Circuit: * Z:\home\zychlix\projekty\Magisterka_symulacje\transformer.asc
+Start Time: Wed Apr  1 13:32:51 2026
+solver = Normal
+Maximum thread count: 12
+tnom = 27
+temp = 27
+method = modified trap
+.OP point found by inspection.
+Total elapsed time: 4.365 seconds.
+

transformer.net

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+* Z:\home\zychlix\projekty\Magisterka_symulacje\transformer.asc
+G1 0 Vprim N002 0 1
+G2 0 N002 Vprim 0 1
+G4 N003 0 N002 0 {Ns}
+G5 N002 0 N003 0 {Ns}
+R1 N002 0 10Meg
+L1 Vprim 0 Hc=28.65 Bs=0.35 Br=0.22 A={A} Lm={Lm} Lg={Lg} N={N}
+G3 0 Vprim N004 0 1
+G6 0 N004 Vprim 0 1
+G7 N005 0 N004 0 {Nf}
+G8 N004 0 N005 0 {Nf}
+R2 N004 0 10Meg
+R3 N005 0 10Meg
+R4 N003 0 10Meg
+V1 N001 0 SINE(0 1 1000 0 0 0)
+R5 Vprim N001 10m
+R6 B 0 1
+B1 B 0 V=idt(v(vprim))/(A*N)
+R7 H 0 1
+B2 H 0 V=I(L1)*(N/Le)
+.param Ns=1 Nf=1
+.tran 0 150m 100m 10u
+.param N 20
+* B
+.param A 0.0000129
+.param Lg 0
+.param Lm 0.0295
+* Gap length
+* In core length
+* Area
+* Turns
+* H
+.param Le={Lg+Lm}
+.backanno
+.end