![](http://u.dianyuan.com/bbs/u/72/2972601229680469.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20)
R g = Internal resistance of the driving source
R P = DC Resistance of the primary winding
R S = DC Resistance of the secondary winding
R L = Load Resistance on the secondary winding
R C = Core losses expressed as a shunt resistance in parallel with the primary windings
C P = Primary shunt and distributed capacitance
C S = Secondary shunt and distributed capacitance
C PS = Primary-to-Secondary inter winding capacitance.
L P = Primary inductance that is mutually coupled to the Secondary
L S = Secondary inductance that is mutually coupled to the primary
L P1 =Primary leakage inductance.
L S1 = Secondary leakage inductance
N P = Number of turns on the primary(主线圈圈数)
N S = Number of turns on the secondary(次级线圈圈数)