I tried to make a ZVS driver simulation, but I cant seem to get any output.



After removing the power supply via an inductor to the center tapped transformer, it gives me an output waveform

I tried directly connecting without an inductor, but the output remained a flatline.

 

hi ican,
Welcome to AAC.
The initial conditions are balanced so it does not oscillate.
I have add a G1 initial offset voltage.

E

 

hi ican,
Welcome to AAC.
The initial conditions are balanced so it does not oscillate.
I have add a G1 initial offset voltage.

E

Oh wow it worked tysm

 

hi ican,
It is a common problem with simulated oscillators, they are so well balanced, they will not run.
In the real circuit, the component tolerances are usually a little unbalanced, so they run OK.
Adding a .IC offset can give them a kick start.

You could also try .tran 0 10m 5m startup
E

 

hi ican,
It is a common problem with simulated oscillators, they are so well balanced, they will not run.
In the real circuit, the component tolerances are usually a little unbalanced, so they run OK.
Adding a .IC offset can give them a kick start.

You could also try .tran 0 10m 5m startup
E

ok thank you, I've been trying to get this working for a whole day now. But what does .tran 0 10m 5m startup do?
Also while I have you here may I ask what determines the oscillating frequency of the ZVS driver if I hook it up to a transformer and a capacitor in parallel with its output as shown below. Is it still determined by the LC oscillator at the primary coil, or must I factor in the values from the secondary coil?

 

hi,
Startup, starts the circuit initial power up from 0V, build up to the Vsource.
Ref the osc freq check this link.

http://www.kiblerelectronics.com/bob/app_notes/note11/note11.html

https://adammunich.com/zvs-driver/
E

 

I tried to make a ZVS driver simulation, but I cant seem to get any output.

View attachment 236556

After removing the power supply via an inductor to the center tapped transformer, it gives me an output waveform
View attachment 236557
I tried directly connecting without an inductor, but the output remained a flatline.

Use the "startup" option.

.tran 50m startup

"start' ramps all voltages sources from 0 over 20u seconds.