Version 4.1
SHEET 1 2336 680
WIRE -160 -192 -192 -192
WIRE -64 -192 -160 -192
WIRE 80 -192 16 -192
WIRE 432 -176 192 -176
WIRE 464 -176 432 -176
WIRE -192 -160 -192 -192
WIRE 80 -160 80 -192
WIRE 192 -160 192 -176
WIRE 464 -160 464 -176
WIRE 192 -64 192 -80
WIRE 320 -64 192 -64
WIRE 464 -64 464 -80
WIRE 464 -64 320 -64
WIRE -192 -48 -192 -80
WIRE 0 -48 -192 -48
WIRE 80 -48 80 -80
WIRE 80 -48 0 -48
WIRE 320 -32 320 -64
WIRE 0 -16 0 -48
FLAG 0 -16 0
FLAG -160 -192 50hz_250V
FLAG 320 -32 0
FLAG 432 -176 out
SYMBOL voltage -192 -176 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 64 -176 R0
SYMATTR InstName L1
SYMATTR Value 10H
SYMATTR Type ind
SYMATTR SpiceLine Rser=1m
SYMBOL ind2 176 -176 R0
SYMATTR InstName L2
SYMATTR Value 10H
SYMATTR Type ind
SYMBOL res 448 -176 R0
SYMATTR InstName R1
SYMATTR Value 100R
SYMBOL res -80 -208 M90
WINDOW 0 -14 58 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R_supply_current
SYMATTR Value 1m
TEXT 632 -360 Left 4 ;instructions
TEXT 632 -320 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 64 -272 Left 2 !K1 L1 L2 1
TEXT 56 -312 Left 2 ;Transformer
TEXT -56 -536 Left 2 ;Spice implements the transformer as 2 inductors with a coupling coefficient \nthe spiceline starting K1 defines the coupling\nlines in blue are comment, lines in black are LTspice instructions.\nthe coupling of 1 is a simplification real transformers have a slightly lower coupling
TEXT -8 -360 Left 4 ;transformer circuit
TEXT -384 8 Left 2 !.tran 100m
TEXT 40 -576 Left 4 ;circuit description
RECTANGLE Normal 240 0 48 -320 2