24V 1000W power supply - autopsy (transformer, GDT, capacitors)

Channel:
Czech Republic DiodeGoneWild
Subscribers:
226,000
Published on ● Video Link: https://www.youtube.com/watch?v=62EmUhxRWFc


Game:
The Transformers (1986)
Duration: 19:25
37,359 views
0

Today, the autopsy of the important components of the 24V 41.7A 1000W switching power supply from eBay. I opened the primary smoothing capacitors, which are apparently fake Nippon Chemi-Con, actually, used relabelled capacitors desoldered from e-waste (scrapped electronics). I also opened and reverse engineered the main power transformer and the GDT (gate drive transformer). I measured the winding inductances, checked the insulation safety, counted the numbers of turns and measured the wire diameters. I checked the capacitances and ESR (impedance) of all electrolytic capacitors. I also checked whether the transformers, the output inductor and the EMI inductor use copper or just copper coated aluminium (CCA). I also reverse engineered the gate drive circuitry of the power MOSFETs, quite a questionable design.

The first episode - what's inside:
https://youtu.be/mxl7ymOSvho

The previous episode - test & measurements:
https://youtu.be/NltsnPR--RI

My DIY inductance meter:
http://danyk.cz/lmetr_en.html

Please support me on Patreon:
https://www.patreon.com/DiodeGoneWild

My Instagram:
https://www.instagram.com/savage_danyk/



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Tags:
24V
1000W
switching
power supply
SMPS
teardown
transformer


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