Simple hall effect current transformer..?
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From: Geir Holmavatn on 9 Nov 2007 18:22 Hi, I wonder if there exist simple current transformer solutions using hall effect devices instead of bulky wound coils. I need to measure current between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The units should contain an A/D converter with output to a standard bus, like for example 1-wire etc.. Has anyone here heard about simple yet relatively accurate (+/- 3%) current sense devices / solutions with digital output..? Thanks for comments and info regards Geir
From: Jamie on 9 Nov 2007 19:21 Geir Holmavatn wrote: > Hi, > > I wonder if there exist simple current transformer solutions using hall > effect devices instead of bulky wound coils. I need to measure current > between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The > units should contain an A/D converter with output to a standard bus, > like for example 1-wire etc.. > > Has anyone here heard about simple yet relatively accurate (+/- 3%) > current sense devices / solutions with digital output..? > > Thanks for comments and info > > regards > > Geir http://www.apcs.net.au/products/niche/hct016.html something like that? -- "I'm never wrong, once i thought i was, but was mistaken" Real Programmers Do things like this. http://webpages.charter.net/jamie_5
From: Dave Plowman (News) on 10 Nov 2007 02:40 In article <5pk8e6FrpmkmU1(a)mid.individual.net>, Geir Holmavatn <geir56(a)hotmail.com> wrote: > Hi, > I wonder if there exist simple current transformer solutions using hall > effect devices instead of bulky wound coils. I need to measure current > between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The > units should contain an A/D converter with output to a standard bus, > like for example 1-wire etc.. > Has anyone here heard about simple yet relatively accurate (+/- 3%) > current sense devices / solutions with digital output..? > Thanks for comments and info Sounds like what you want is a clamp test meter. They work to that sort of accuracy. They're priced from only a few dollars - but one with a data output bus will be more. -- *Preserve wildlife - Go pickle a squirrel* Dave Plowman dave(a)davenoise.co.uk London SW To e-mail, change noise into sound.
From: isw on 10 Nov 2007 23:05 In article <5pk8e6FrpmkmU1(a)mid.individual.net>, Geir Holmavatn <geir56(a)hotmail.com> wrote: > Hi, > > I wonder if there exist simple current transformer solutions using hall > effect devices instead of bulky wound coils. Check out F. W. Bell; they used to make Hall-based units good for up to a few hundred amps. Isaac
From: ciscodsl on 11 Nov 2007 10:58
On Nov 10, 8:05 pm, isw <i...(a)witzend.com> wrote: > Check out F. W. Bell; Indeed some neat products. The OP request for a digital output may not be so immediately available but the following link points to an "easy to embed" solution for in-system use. The 0->5V output can easily be converted to a digital value by feeding the voltage into the A/D converter of your favorite microcontroller. ciscodsl |