Hello.

I have rewind a transformer to get differents voltages. What I have done is every some turns, I got a cable. I show it here









But I have just realised that when a transformer have differents outputs use this configuration










I mean, different windings for each output. In mine, since I only going to use only 1 output each time, should be no problem right?

But I suposse I won't be able to use 2 outputs simultaneously right? I mean, I wanted to run a induction heater with 2 independents power supplies, one for the main circuit (24V) and the other for the gates of the MOSFETs (19V).

I really appreciate any advice.

Best regards

 

You can use two separate bridge rectifiers to make your PSUs.

 

Thanks for your answer.










So I could use the bridge A to give current to the gates of the mosfets and bridge B to the rest of the circuit and they behave like 2 independent power supplies right?

 

Careful, you cannot have a common ground between the two voltages.

You don’t need a separate 19V supply the gates, there are other ways to handle it.

 

Ah ok. The question is that I have already made the induction heater. I´ll use another power supply for the gates then

 

I mean, different windings for each output. In mine, since I only going to use only 1 output each time, should be no problem right?

But I suposse I won't be able to use 2 outputs simultaneously right? I mean, I wanted to run a induction heater with 2 independents power supplies, one for the main circuit (24V) and the other for the gates of the MOSFETs (19V).

To use both windings you require the Va size of the TXMR or an close estimation, based on Primary wire size and and core size.

 

Ah ok. The question is that I have already made the induction heater. I´ll use another power supply for the gates then

Why not just add a voltage regulator to get 19V from the 24V supply?

We need to see your actual circuit. Perhaps you are talking about using an N channel MOSFET, which is a different issue.

 

Here is the diagram.


I cut in point A to put a independent power supply. I was said that is important that the gates have current before the rest of the circuit. Because the power suppli for the gates is 19volts, the 470ohms resisors was changed for 100ohm

 

The best solution seems to be that of starting over and doing it “right”. Then you are not working with a compromise

 

Ok. So what should I do?

 

First decide what you want to do, then
Undo what you did, then
Redo it the way you want it.

 

Here is the diagram.


I cut in point A to put a independent power supply. I was said that is important that the gates have current before the rest of the circuit. Because the power suppli for the gates is 19volts, the 470ohms resisors was changed for 100ohm

This is an Induction heating circuit, it just uses one psu 12-15V.

 

Thanks for your answers