Recent content by Ramazan Duzgun

Thank you for your reply, but first of all I have no design data. I only have a diode and its poor datasheet. How can I specify the heatsink dimensions ?

In reference of Ned Mohan's book, I have designed a heatsink, firstly natural convection taken into account, but laboratory test results and theoretical calculations are not matching. The test results: For 40 A (means 62 W), 30 Celsius ambient temp, it raised up 51 Celsius. So, Rs-a =...

Thans! it helped.

Yes it is E section ferrite core. But I am confused with the last thing you said; should I choose a model for primary to apply a test ? Or why I can not use common transformer model which is shown below figure ? And if I apply AC test voltages from 1kHz to 10kHz, according to different...

Thanks, but I want to apply open circuit and short circuit tests. Turns ratios are known already, 21:3:3. My aim is to find its magnetizing reactances and copper reactances. I am not sure what frequency is required to not saturate the transformer. Probably, feeding by 320 V at grid frequency (50...

21 is the primary, HV side, because the cables are thinner than secondary. Cables at the tap point (mid cable) are really large in comparison to top and bottom terminals cable. But I can not reach its number of turns and cable sizes. Its input rated voltage is 320 V square wave (feeding from...

Actually I don't have entire design data. It says on the transformer " E130-500A 21: 3: 3: ". This is a high frequency power transformer, probably 30 kHz. Its core size 15 cm x 15 cm.

It is a common center-tap transformer which is electrically demonstrated as in figure (ideal one); In my opinion, open circuit and short circuit tests cannot be applied directly. How can I place secondary reactances ? And how can I test its all parameters in laboratory ?

How can you say that isn't really possible ? what do you relly on ? can you show me any proof of it..thank you btw

i consider it inside of the atmosphere, on earth. But in vacuum i guess it doesn't matter. Light can travel in both mediums, right?

is it possible, i mean can we hold it at a certain distance we want ?