LTSpice / Problem with transformer

Discussion in 'General Electronics Chat' started by Shadowlord, Jun 1, 2005.

  1. Shadowlord

    Thread Starter New Member

    Jun 1, 2005
    I've build a simple transformer model with LTSpice. I works wonderful with the voltage, but I've got a problem with the current. On the secondary side i have a rectifier, current and voltage shape are ok. But on the primary side, I have a sinus shaped curren with a dc offset. Can somebody help me further ?

    P.S. The transformer is build with two inductors (coupling=1) and two resistors for the resistance
  2. mozikluv

    AAC Fanatic!

    Jan 22, 2004

    post your circuit :D
  3. Shadowlord

    Thread Starter New Member

    Jun 1, 2005
    Main circuit

    * C:\Programme\LTC\SwCADIII\examples\Jung\Test\Transformator_1.asc
    V1 Phase_In 0 SINE(0 340 50)
    X§T1 Phase_In 0 Phase_Out 0 Trafo_1P
    D1 Phase_Out DC+ MURS320
    D2 0 DC+ MURS320
    D3 DC- Phase_Out MURS320
    D4 DC- 0 MURS320
    C1 DC+ DC- 100µ
    R1 DC+ DC- 100
    .model D D
    .lib C:\Programme\LTC\SwCADIII\lib\cmp\standard.dio
    .tran 0.1
    .lib Jung_1\Trafo_1P.sub


    * 1 Phasentrafo
    * L1= 76mH
    * L2= 0.76mH
    * u= 10
    * Ohmscher Widerstand = 0.01 Ohm

    .subckt Trafo_1P P1 N1 P2 N2
    L1 N001 N1 0.076
    L2 N002 N2 7.64e-4
    R1 P1 N001 0.01
    R2 P2 N002 0.01
    K1 L1 L2 1
    .ends Trafo_1P