Difference between revisions of "Transformers"

From Steak Wiki
Jump to navigationJump to search
 
(2 intermediate revisions by the same user not shown)
Line 8: Line 8:
 
breakdown voltage of the windings. For 120V mains transformers it's around 1200V (maybe i think 1500V). See https://www.youtube.com/watch?v=NhWkxIBGkCM Lots of youtube videos on hi pot testing. /archive /2023_03.
 
breakdown voltage of the windings. For 120V mains transformers it's around 1200V (maybe i think 1500V). See https://www.youtube.com/watch?v=NhWkxIBGkCM Lots of youtube videos on hi pot testing. /archive /2023_03.
  
 +
===Faraday Shields===
 +
They can be built different ways, connected to different windings
 +
* https://canadatransformers.com/faraday-shield
 +
* http://web.archive.org/web/20240228180910/https://canadatransformers.com/faraday-shield/
  
 
+
===Disassembly Should Not Destroy Them===
 +
separating them, then reassembling should not destroy them if done properly.
 +
Use a proper measuring tool (calipers, micrometer) to get the before disassembly
 +
and after disassembly distance between the cores.
 +
* https://www.eevblog.com/forum/projects/heated-ferrite-useless-ferrite/
 +
* https://electronics.stackexchange.com/questions/497489/temperature-degradation-of-ferrite-cores
 +
Mention of diodes gone wild. When in doubt of the before / after performance, make some measurements.
  
 
[[Category:online notes]]
 
[[Category:online notes]]

Latest revision as of 22:57, 29 April 2024

Tips/Techniques

Measuring Capacitance between Windings

There are expected values. Consider the capacitance may differ based on frequency per Capacitors. See: https://www.eevblog.com/forum/chat/custom-r-core-transformers-on-ebay/ This thread also links to a few places where you can buy custom made ones.

Hi Pot testing

breakdown voltage of the windings. For 120V mains transformers it's around 1200V (maybe i think 1500V). See https://www.youtube.com/watch?v=NhWkxIBGkCM Lots of youtube videos on hi pot testing. /archive /2023_03.

Faraday Shields

They can be built different ways, connected to different windings

Disassembly Should Not Destroy Them

separating them, then reassembling should not destroy them if done properly. Use a proper measuring tool (calipers, micrometer) to get the before disassembly and after disassembly distance between the cores.

Mention of diodes gone wild. When in doubt of the before / after performance, make some measurements.