How to test a flyback transformer ? thanks

How to test a flyback transformer ?

thanks

Dear danishdeshmuk
Hi
It is very simple. do you have oscilloscope and function generator? you should get an square wave with your switching frequency( with function generator) across the primary winding of transformer and then with oscilloscope check the ratio of change of transformer and its phase ( with xy mode ) . (dual channel ).
Best Wishes
Goldsmith

what should be the ratio of change of transformer & its phase ?

Can't be checked with DMM ?

thanks

What do you mean by " yo get a square wave with your switching frequency " ?

means by changing the frequency via function generator or what ?

Connect oscilliscope to the secondary winding & apply the function generator (frequency) to the primary side ?

What should be the range of the frequency ?

Don't we need to apply the voltage ?

Ample amount of thanks to you guyz

Hey Gentleman!
Hi
For example , suppose that the frequency of switch is about 120KHZ , if your switch become on -off , the current of transformer will be triangle wave(approx) and the voltage across it will be square wave . ok? so , you can use a function generator to make this square wave with 120KHZ frequency for testing the behavior of your transformer . is your transformer multi secondary? **************(it is important to know for me to answer about phase)
And at first step you don't need to use DC voltage for testing your transformer.
And about ratio of change: consider that you designed transformer with 1.2 ratio of change ( if you give to it a 120KHZ 100 volt , it will give to you a 120KHZ 50volt as well as) with the oscilloscope and function generator, try to know that , is the real behavior of transformer like your calculations?
Best Wishes
Goldsmith