There are some terms of transformer modeling in spice simulation, like below,
.SUBCKT 1TO1#0 1 2 3 4 VISRC 9 4 DC 0V FCTRL 6 2 VISRC 1E+0 EVCVS 8 9 5 2 1E+0 RPRI 1 7 1E-1 RSEC 8 3 1E-1 LLEAK 7 5 1E-6
What meaning of the VISRC and FCTRL and EVCVS are?