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Groups > sci.electronics.design > #451969
| From | Clive Arthur <cliveta@nowaytoday.co.uk> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Choke winding question |
| Date | 2017-03-15 17:03 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <oabrvf$mv0$1@dont-email.me> (permalink) |
| References | <oabn87$5ag$1@dont-email.me> <oabr8m01dl2@drn.newsguy.com> |
On 15/03/2017 16:48, Winfield Hill wrote: > Clive Arthur wrote... >> >> I was using a Ferroxcube calculator to work out some choke windings. >> These have to be multiple RM12, about 5mH and 2.5A DC, so I was looking >> at the maximum inductance before saturation for different cores. >> >> A 400nH core means 4 series cores each with 57 turns giving 1.3uH each. >> or 3 x 250nH cores with 89 turns, 2000uH each >> or 10 x 1000nH cores with 22 turns, 500uH each. >> >> The 400nH cores are probably best, 89 turns won't fit with reasonably >> thick wire and 10 cores is painful. >> >> However - it seems that the /total/ number of turns is about constant. >> Is that a rule of thumb, just normal or just lucky? > > Did you play with the gap size? > > The three cores modelled are the same ferrite material and the same size (RM12), they have different gaps giving them different Al values... 250nH = 901um 400nH = 511um 1000nH = 171um Cheers -- Clive
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Choke winding question Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-03-15 15:42 +0000
Re: Choke winding question Winfield Hill <hill@rowland.harvard.edu> - 2017-03-15 09:48 -0700
Re: Choke winding question Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-03-15 17:03 +0000
Re: Choke winding question John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-03-15 10:29 -0700
Re: Choke winding question Winfield Hill <hill@rowland.harvard.edu> - 2017-03-15 11:37 -0700
Re: Choke winding question Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-03-15 22:02 +0000
Re: Choke winding question Winfield Hill <hill@rowland.harvard.edu> - 2017-03-15 15:16 -0700
Re: Choke winding question Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-03-15 23:36 +0000
Re: Choke winding question rickman <gnuarm@gmail.com> - 2017-03-15 21:41 -0400
Re: Choke winding question Phil Allison <pallison49@gmail.com> - 2017-03-15 19:28 -0700
Re: Choke winding question bill.sloman@ieee.org - 2017-03-15 20:12 -0700
Re: Choke winding question rickman <gnuarm@gmail.com> - 2017-03-16 00:00 -0400
Re: Choke winding question Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-03-16 09:03 +0000
Re: Choke winding question Winfield Hill <hill@rowland.harvard.edu> - 2017-03-16 05:56 -0700
Re: Choke winding question bill.sloman@ieee.org - 2017-03-16 09:42 -0700
Re: Choke winding question legg <legg@nospam.magma.ca> - 2017-03-15 19:23 -0400
Re: Choke winding question "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-15 22:56 -0500
Re: Choke winding question Phil Allison <pallison49@gmail.com> - 2017-03-15 22:30 -0700
Re: Choke winding question "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-03-16 15:08 -0500
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