I want to make SMPS power supply.

[zxpa]

I want to make SMPS power supply?

As a beginner I don't know are these circuits are workable?
Please if somebody who has more experience to recommend me the scheme I uploaded here?

All of these schemes are different power.

Is this scheme workable?

Is this scheme workable?

Is this scheme workable?

Is this scheme workable?
Does this EMI filter hase built in NTC resistor?
https://www.tme.eu/en/details/fyb10t1/iec-60320-connectors/yunpen-electronic/

Is this scheme workable?
There is transformer connected at 220V AC
Do I need 150W iron cored transformer for this circuit?

 

[zxpa]

I connected my multimeter to positive and negative rail and set it to measure DC voltage to max 1000V.
I have not connected transformer yet. I have not winded it yet. I am connecting and examinig the circuit step by step.
How I say use light bulb in series to secure each step.

The kickback voltage start happening when I come to step to connect the transistors.

 

[KlausST]

Unclear.

--> mark the position of the connections in a schematic.
Or upload a photo (max 100kBytes) where we can see the whole circuit and especially the connections.

Klaus

 

[zxpa]

 

[KlausST]

Hi,

at this point .... there are two 1000uF in series.
According my understanding it is impossible for "kickback" to generate voltages in the range of 1000V there.

There must be something wrong.


Klaus

 

[zxpa]

I am going to check. I think that it is related to transistors?

 

[Mehvish99]

Creating an SMPS power supply can be a complex project. It involves designing and implementing a circuit that efficiently converts AC power to DC power. If you're new to electronics, it's recommended to start with simpler projects and gradually increase the complexity.

 

[zxpa]

I checked but I cannot find the mistake?

I think I should wind the ferrite cored transformer?

I should try to connect the transformer.

Maybe it is happening because this circuit is still open wihout load of primary winding of ferrite cored transformer.

How I say I have the bulb connected in series so it prortects the circuit from hazardous effect.

Please if somebody can advice me what ferrite core should I need to buy
for power of 350 Watts?

M&G Electronic | Feritna jezgra

www.mgelectronic.rs

M&G Electronic | Feritna jezgra E

www.mgelectronic.rs

 

[Easy peasy]

you need to try to work out a design and draw it up - there is a lot of knowledge required to design a transformer - you're best bet is to read as many articles as possible from reputable sources . . .

 

[BigBoss]

Solutions Finder: Designs | Power Integrations

www.power.com

This company supplies PCB files, schematics, transformer information etc.

 

[zxpa]

I connected capacitor of 10nF/3kV and the voltage is about 300 Volts and it behaves stable.