Inductors in Power Supplies

Samuel Jayaraj · 20th November 2001, 01:25 PM

Can someone suggest as to how to construct inductors using EI cores of CRGO/CRNGO laminations, capable of handling >6Amps to be used in CLC type of power supplies?

Any help will be much appreciated.

Many thanks,

AudioFreak · 20th November 2001, 01:48 PM

i see you are trying to construct a pi filter for your power supply ...... the best inductors for this are film air core inductors...... Alpha-Core make inductors that fit the bill nicely.

Samuel Jayaraj · 21st November 2001, 02:17 PM

Thanks AudioFreak. I am aware that there might be a few manufacturers like the one that you mention. But obtaining them will pose problems with import restriction in my country. Hence, my idea to build them locally using EI core.

Any ideas?

walker · 21st November 2001, 10:06 PM

Samuel, I've had good results using secondary windings of old transformers with suitable VA ratings. Rewind them if you like.
Look out for high voltages on the primaries.

Regards WALKER

Super_BQ · 21st November 2001, 10:15 PM

Why not just try making your own air core inductors?
I had to make my own for my amp below

http://www.geocities.com/super_bq/soz3.html

20th November 2001, 01:25 PM	#1
Samuel Jayaraj diyAudio Member Join Date: May 2001 Location: Bangalore, India	Can someone suggest as to how to construct inductors using EI cores of CRGO/CRNGO laminations, capable of handling >6Amps to be used in CLC type of power supplies? Any help will be much appreciated. Many thanks, __________________ Sam

21st November 2001, 02:17 PM	#3
Samuel Jayaraj diyAudio Member Join Date: May 2001 Location: Bangalore, India	Thanks AudioFreak. I am aware that there might be a few manufacturers like the one that you mention. But obtaining them will pose problems with import restriction in my country. Hence, my idea to build them locally using EI core. Any ideas? __________________ Sam

21st November 2001, 10:15 PM	#5
Super_BQ diyAudio Member Join Date: Sep 2001 Location: New Zealand / Canada	Air Core Why not just try making your own air core inductors? I had to make my own for my amp below http://www.geocities.com/super_bq/soz3.html

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20th November 2001, 01:48 PM	#2
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	i see you are trying to construct a pi filter for your power supply ...... the best inductors for this are film air core inductors...... Alpha-Core make inductors that fit the bill nicely.

21st November 2001, 10:06 PM	#4
walker diyAudio Member Join Date: Nov 2001 Location: Perth West Australia	Samuel, I've had good results using secondary windings of old transformers with suitable VA ratings. Rewind them if you like. Look out for high voltages on the primaries. Regards WALKER

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