Hi my friends,
I hope all of you are doing well.
Kindly I was wondering why there are multiple transformers in some SMPS.
And can I test the primary and secondary winding if there is a short with the LCR meter model DER EE 5000? and how?
thanks in advance to all of you.
kind regards

 

There's usually 1 main one and possibly a small driver , the others will be chokes for mains input smoothing.

Why do you think the capacitor is faulty?

 

There's usually 1 main one and possibly a small driver , the others will be chokes for mains input smoothing.

Why do you think the capacitor is faulty?

no no my friend I'm not asking for the capacitors and the black arrows it was just from the original picture I just took this picture as an example.
I'm just focusing on the transformer and how I test it with LCR meter

 

Using a transformer to generate a gate drive signal is one possible explanation for multiple transformers.

 

Using a transformer to generate a gate drive signal is one possible explanation for multiple transformers.

thanks sir

 

Many switch-mode power supplies have, in addition to the main energy storage inductor, an incoming power filter choke, and at least one filter device. Not everything that looks like a transformer IS a transformer.
I suggest examining the circuits of some actual switcher supplies to learn more.

 

Here is a typical Atx circuit diagram, I've marked the transformers and filter. The small driver transformer is to isolate the chip from the mains .

 

Many switch-mode power supplies have, in addition to the main energy storage inductor, an incoming power filter choke, and at least one filter device. Not everything that looks like a transformer IS a transformer.
I suggest examining the circuits of some actual switcher supplies to learn more.

thanks sir

 

Here is a typical Atx circuit diagram, I've marked the transformers and filter. The small driver transformer is to isolate the chip from the mains .

View attachment 304601

thanks sir really I appreciate your help
I suggest examining the circuits of some actual switcher supplies to learn more.