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Old 18th January 2012, 04:20 AM   #1
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Default How to make a coupled inductor using Toroidal core?

Please give u r answers as soon as possible.
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Old 18th January 2012, 06:14 AM   #2
benb is offline benb  United States
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Wind wire round it.
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Old 18th January 2012, 10:16 AM   #3
DF96 is offline DF96  England
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Quote:
Please give u r answers as soon as possible.
Deadline for handing work in for marking?
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Old 18th January 2012, 10:42 AM   #4
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Search in google for a work from Lloyd Dixon (I believe from Texas Instrument or Unitrode). There is an example of how to calculate coupled chokes for a SEPIC.

Good luck.
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Old 19th January 2012, 06:34 AM   #5
dtproff is offline dtproff  United States
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Originally Posted by pandusambu View Post
Please give u r answers as soon as possible.
Here is a design example using mutual inductance formula from Dixon.

Tony
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File Type: pdf 150W 3A 48V Forward PQ2625-PC40.pdf (66.4 KB, 158 views)
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Old 19th January 2012, 11:23 AM   #6
AndrewT is online now AndrewT  Scotland
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I love it.
Don't spoon feed the Member, just give Him/Her the Research Resources to help them to find out for themselves.

BTW,
those 12pages will probably keep me going into the next decade to gain a full understanding.
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Old 19th January 2012, 06:43 PM   #7
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Those 12 pages are nice, but not much use to a beginner. This link has useful information. SwitchModePowerSupply.net- Magnetic Design
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Old 20th January 2012, 02:40 PM   #8
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Originally Posted by dtproff View Post
Here is a design example using mutual inductance formula from Dixon.

Tony
Excellent !
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Old 21st January 2012, 07:20 PM   #9
dtproff is offline dtproff  United States
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I will tell you why I sent it. There is a real lack of reliable information showing the true design process that a power supply engineer goes through to design a power supply. You don't just grab some wire and a transformer and go with it. So I thought I would pitch this out there and see if anyone would even take the time to wade through the math.

I have these for every topology I have ever done. If you do the math first, everything else is an exercise in execution.

Tony
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Old 21st January 2012, 09:46 PM   #10
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Tony,

I agree with your intent and issue, but there is much better Unitrode stuff available for a beginner. (I think the link I provided will be helpful.) It drives me nuts when I see a post about a transformer or inductor and the guy asking the question doesn't have a clue about what material his core has or anything else.

Rick
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