I'm trying to make a Zeta converter

Question

I tried to design Zeta converter to be used in an MPPT charge controller.

V_IN: 10-22 V
I_IN: 3 A
F_s: 30 kHz

I have a problem.

With my design, the voltage is not coming out so well and nothing changes if I change the duty cycle (in real, not simulation, I have made a prototype.)

I tried simulating in software with Multisim 14.3 and it works. I found out that if I send PWM to the gate with high voltage is 23 V and a low voltage is -23 V, it will work like Zeta converter.

Is it possible to do that?

Here is a link to the simulation video:

Link to the video

Edited:

I have tried with isolated supply, but this was happend

Link to video

So, when i turn on my supply for the converter, the supply voltage become not stable as you can see in the video also 0 Vout from converter

Answer 1

Please read the note I added to one of your pictures: -

With my design, the voltage is not coming out so well and nothing changes if I change the duty cycle

Given Q1's source (output) is shorted to ground, that's all you can expect. U1 needs to run from a floating supply like from an isolated DC-to-DC converter.

Edited: I have tried with isolated supply, but this was happend

That won't work. In effect you are shorting the green node to the positive terminal of battery B2 and, you are shorting the orange node to +23 volts.

Just use a regular 0 volt / ground symbol connected to the negative terminal of B1 and ditch the 0 volt / ground symbol on the negative end of B2