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[SOLVED] SMPS transformer testing

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anand003

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Dear Folks,

I want to test smps transformer (230v to 20v). Can I test it by giving 230v AC directly to the primary???.. (In fact I have tested it connecting to 230v AC but the MCB trips when it is tested, is it possible to test a SMPS transformer to connect directly to the AC ??) . Is the SMPS transformer is like normal step down transformer.. ???

As I am not a hardware expert please advice..
 

FvM

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is it possible to test a SMPS transformer to connect directly to the AC
No, as already found out by trial.

Is the SMPS transformer is like normal step down transformer
It's a step down transformer operating at several 10 kHz. Your question suggests, that you don't have the means to test it, possibly except for measuring winding resistances and isolation.
 

liteon

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The smps transformer is not normal step down transformer. Generally they operate at higher frequencies.The frequency of AC power is 50Hz/60HZ. Thats why in SMPS the AC power is first synchronized and converter to DC voltage and fed to the transformer along with some driver chip.
Putting a Pure SMPS transformer directly to AC power source may fry it almost immediately.
 
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