Version 4
SHEET 1 880 680
WIRE 208 -224 -224 -224
WIRE 336 -224 208 -224
WIRE -224 -160 -224 -224
WIRE -224 -64 -224 -80
WIRE 16 -64 -224 -64
WIRE 16 -48 16 -64
WIRE 16 16 16 0
WIRE 336 64 336 -224
WIRE 16 96 16 64
WIRE 208 112 208 -224
WIRE 16 192 16 160
WIRE 128 192 16 192
WIRE 160 192 128 192
WIRE 16 240 16 192
WIRE 128 240 128 192
WIRE -224 256 -224 -64
WIRE 16 368 16 352
WIRE -224 384 -224 336
WIRE 16 384 16 368
WIRE 16 384 -224 384
WIRE 128 384 128 320
WIRE 128 384 16 384
WIRE 208 384 208 208
WIRE 208 384 128 384
WIRE 336 384 336 144
WIRE 336 384 208 384
FLAG 336 384 0
SYMBOL voltage 336 48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1_Solar
SYMATTR Value 319
SYMBOL res 112 224 R0
SYMATTR InstName R1
SYMATTR Value {R1}
SYMBOL Misc\\NIGBT 160 112 R0
SYMATTR InstName Z2
SYMATTR Value IRGBC20F
SYMBOL zener 0 96 R0
WINDOW 0 40 31 Left 2
WINDOW 3 -100 34 Left 2
SYMATTR InstName D1
SYMATTR Value KDZ12B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 32 304 R180
WINDOW 0 -35 26 Left 2
WINDOW 3 41 24 Left 2
SYMATTR InstName D2
SYMATTR Value KDZ12B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 32 16 R180
WINDOW 0 -37 27 Left 2
WINDOW 3 41 30 Left 2
SYMATTR InstName D5
SYMATTR Value KDZ18B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 32 64 R180
WINDOW 0 -37 29 Left 2
WINDOW 3 42 30 Left 2
SYMATTR InstName D3
SYMATTR Value KDZ18B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 32 368 R180
WINDOW 0 -37 31 Left 2
WINDOW 3 40 31 Left 2
SYMATTR InstName D4
SYMATTR Value KDZ18B
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -240 -176 R0
SYMATTR InstName R3
SYMATTR Value 91k
SYMBOL res -240 240 R0
SYMATTR InstName R4
SYMATTR Value 30k
TEXT 304 408 Left 2 !.tran 10m
TEXT -112 440 Left 2 !.option gmin=1e-10
TEXT 480 72 Left 2 !.MODEL IRGBC20F NIGBT\n+ TAU=263.96E-9\n+ KP=.82992\n+ AREA=32.000E-6\n+ AGD=4.0000E-6\n+ VT=5.6227\n+ KF=1.8345\n+ CGS=1.2212E-9\n+ COXD=5.4740E-9\n+ VTD=-6.4920
TEXT -32 -336 Left 2 ;https://www.mikrocontroller.net/topic/408553#new
TEXT -32 -376 Left 2 ;LTSpice IGBT Problem
TEXT -96 488 Left 2 !.step param R1 50 100k 10k