Version 4.1
SHEET 1 2336 680
WIRE -112 -480 -144 -480
WIRE -16 -480 -112 -480
WIRE 128 -480 64 -480
WIRE 480 -464 240 -464
WIRE 512 -464 480 -464
WIRE -144 -448 -144 -480
WIRE 128 -448 128 -480
WIRE 240 -448 240 -464
WIRE 512 -448 512 -464
WIRE 240 -352 240 -368
WIRE 368 -352 240 -352
WIRE 512 -352 512 -368
WIRE 512 -352 368 -352
WIRE -144 -336 -144 -368
WIRE 48 -336 -144 -336
WIRE 128 -336 128 -368
WIRE 128 -336 48 -336
WIRE 368 -320 368 -352
WIRE 48 -304 48 -336
FLAG 48 -304 0
FLAG -112 -480 50hz_250V
FLAG 368 -320 0
FLAG 480 -464 out
SYMBOL voltage -144 -464 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -197 7 Left 2
SYMATTR Value SINE(0 353 50)
SYMATTR InstName V1
SYMBOL ind2 112 -464 R0
SYMATTR InstName L1
SYMATTR Value 10H
SYMATTR Type ind
SYMATTR SpiceLine Rser=1m
SYMBOL ind2 224 -464 R0
SYMATTR InstName L2
SYMATTR Value 10H
SYMATTR Type ind
SYMBOL res 496 -464 R0
SYMATTR InstName R1
SYMATTR Value 100R
SYMBOL res -32 -496 M90
WINDOW 0 -14 58 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R_supply_current
SYMATTR Value 1m
TEXT 640 -616 Left 3 ;instructions
TEXT 648 -584 Left 2 ;click on run\nthen click on the "50hz_250V" net\nthis should plot the voltage waveform\nthen click on the "out" net\nagain this should plot the voltage.\nclick on the plot window,\nthen click on plot settings/add plot pane.\n then click on R1 to plot the output current\nthen click on R_supply_current to plot the current\nfor this simple transformer the  the primary and secondary \nvoltages and currents are the same
TEXT 112 -560 Left 2 !K1 L1 L2 1
TEXT 104 -600 Left 2 ;Transformer
TEXT 352 -216 Left 2 ;Spice implements the transformer as 2 inductors with a coupling coefficient \nthe spiceline (black text) starting K1 defines the coupling\nlines in blue are comment, lines in black are LTspice instructions.\nthe spiceline coupling coefficient of 1 is a simplification, \nas real transformers have a slightly lower coupling.\nthe use of high inductances for the transformer means that....\nthe primary current is a close reflection of the secondary current,
TEXT 96 -664 Left 4 ;a really simple transformer circuit
TEXT -336 -336 Left 2 !.tran 100m
TEXT 344 -256 Left 3 ;circuit description
RECTANGLE Normal 288 -288 96 -608 2