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I simulated this circuit but got an unexpected signal. The result appears on the graph. enter image description here But I expected this result:

enter image description here

These pictures show my transformer and lamp settings: enter image description here

enter image description here

The schematic and oscilloscope picture are taken from this link: https://www.youtube.com/watch?app=desktop&v=urKi9OLDdCA

I mean, I don't understand. What's my mistake?

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    \$\begingroup\$ What is the voltage reference of the P1 graph? To measure voltage, you need to measure voltage between 2 points, yet it only seems to use 1 point \$\endgroup\$
    – Ferrybig
    Commented Mar 28 at 21:51
  • \$\begingroup\$ @Ferrybig I tried, but got a similar result \$\endgroup\$
    – Serkan Kaya
    Commented Mar 28 at 21:59
  • \$\begingroup\$ Please show a full and proper schematic of the design that you believe works. Also, explain what the coupling factor and turns ratio is for the transformer along with its primary inductance. \$\endgroup\$
    – Andy aka
    Commented Mar 28 at 22:40
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    \$\begingroup\$ You should look at the primary waveforms to confirm the transformer is being driven correctly. I expect that the extra pulses are due to back emfs \$\endgroup\$
    – Andy aka
    Commented Mar 29 at 9:53
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    \$\begingroup\$ Try using a resistor for the load and, not one of value 100 kohm. Maybe 1 kohm \$\endgroup\$
    – Andy aka
    Commented Mar 29 at 10:01

2 Answers 2

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enter image description here

The load was just too high in value and, back-emfs from the flux in the transformer are masking the true power output voltage waveform. From comments: -

Try using a resistor for the load and, not one of value 100 kohm. Maybe 1 kohm – Andy aka

> @Andy aka Thanks, it works now – Serkan Kaya

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seems like discarge part of coil as in this transformer/circuit phase shifting is not used... circuit use half phase of coil then leawes it to discharge itself... so simulator simulates discharge phase generated voltage mostlikely or sister coil generated shadow voltage or watewer its called. there is in reality 2 coils on 12 volts side...

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  • \$\begingroup\$ how can I simulate this circuit? \$\endgroup\$
    – Serkan Kaya
    Commented Mar 29 at 8:51

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