Qspice does not correctly read the input no-load current (transformer without load) of the transformer. LTspice counts according to the theory.
And here is an example of a transformer model to understand what inductances are in it:
- Trace Elliot 15W output transformer, 8k primary, 16/8 ohm sec.
- Part no. 73 TRAN 15W OP
- [1] Red —. ||
-
) || .--- Green (16 ohm) [4] -
) || ( -
) || ( - [2] White —. || .— Yellow (8 ohm) [5]
-
) || ( -
) || ( -
) || .--- Brown [6] - [3] Blue —. ||
.SUBCKT trace15 1 2 3 4 5 6
*
- Primary
Lleak1 1 20 2mH
Lpri1 20 21 150H
Rpri1 21 2 186
Cpri1 1 2 120p
Lleak2 2 22 2mH
Lpri2 22 23 150H
Rpri2 23 3 201
Cpri2 2 3 120p
*
- Secondary
Lleak3 5 24 10uH
Lsec1 24 25 0.6H
Rsec1 25 6 0.8
Lleak4 4 27 10uH
Lsec2 27 28 0.3H
Rsec2 28 5 0.4
Kcoup Lpri1 LPri2 Lsec1 Lsec2 1.0
.ENDS
