Andurist AC lugemine
#1
Heips!

Kasutuses voolutrafo: http://www.tme.eu/en/Document/ab947a935c...ac1010.pdf

Täitsa hästi töötab, mõõtsin 10A voolu ka tangidega, erinevus 1%.
Jama selles, et andur annab koos 100 oomise takiga AC'd, s.t 1A voolu korral on väljundis 100mVAC.
Vaja see suhtlema panna Arduinoga, s.t istutada see analoogsisendisse, mis teadupärast sööb vaid alalist.
Anduri põhitöö hakkab minu rakenduses pihta vahemikus 4A kuni 8A, s.t kontroller hakkab selles vahemikus tegema lülitusi jne.
S.t vahelduvpinge liigub mind huvitavas osas suurujärgus 0.4V kuni 0.8V. Aga võib juhtuda, et vool läbi anduri võib minna ka 60+A peale, s.t väljundisse võib tulla 6+VAC.
Andurist saab olude sunnil viia läbi juhtme vaid 1 kordselt, s.t tiire ümber anduri teha ei või. Aga see ei tohiks ka mureks olla. Antud rakenduses on 100mv/A päris hea resolutsioon.

Tagasi algusesse.
Olen leidnud, et alaldamist tehakse kahte moodi.
1 variant on sillaga, aga madalate pingete puhul kaob see dioodidesse ära ja asi mutt.
2. variant on nt. 2.5V stabiga anda referents, ja sellele liidetakse juurde tulev AC osa juurde. Mängus on ka opakas.

Tähtis pole niivõrd täpne väärtus, vaid referentsi saamine, mille põhjal edasi lülitada.

Keegi oskab täpselt õiget asja soovitada, joonistada?

Tänud,

Heldur
Vasta


Sõnumeid selles teemas
Andurist AC lugemine - Autor: W@ldur - 18-02-2013, 10:40 PM
RE: Andurist AC lugemine - Autor: madis - 18-02-2013, 11:49 PM
RE: Andurist AC lugemine - Autor: W@ldur - 19-02-2013, 12:12 AM
RE: Andurist AC lugemine - Autor: madis - 19-02-2013, 05:40 PM
RE: Andurist AC lugemine - Autor: W@ldur - 19-02-2013, 09:18 PM
RE: Andurist AC lugemine - Autor: martinr112 - 20-02-2013, 01:22 AM
RE: Andurist AC lugemine - Autor: W@ldur - 20-02-2013, 09:01 AM
RE: Andurist AC lugemine - Autor: madis - 20-02-2013, 10:49 AM
RE: Andurist AC lugemine - Autor: W@ldur - 20-02-2013, 12:06 PM
RE: Andurist AC lugemine - Autor: redart - 20-02-2013, 02:08 PM
RE: Andurist AC lugemine - Autor: martinr112 - 20-02-2013, 11:24 PM
RE: Andurist AC lugemine - Autor: madis - 20-02-2013, 11:28 PM
RE: Andurist AC lugemine - Autor: A.R. - 21-02-2013, 10:14 AM
RE: Andurist AC lugemine - Autor: W@ldur - 23-02-2013, 02:17 PM
RE: Andurist AC lugemine - Autor: A.R. - 23-02-2013, 03:35 PM
RE: Andurist AC lugemine - Autor: W@ldur - 23-02-2013, 03:40 PM
RE: Andurist AC lugemine - Autor: felch - 24-02-2013, 09:16 PM
RE: Andurist AC lugemine - Autor: A.R. - 25-02-2013, 09:45 AM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 12:34 PM
RE: Andurist AC lugemine - Autor: A.R. - 25-02-2013, 02:45 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 03:08 PM
RE: Andurist AC lugemine - Autor: andrei - 25-02-2013, 06:54 PM
RE: Andurist AC lugemine - Autor: A.R. - 25-02-2013, 06:07 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 07:23 PM
RE: Andurist AC lugemine - Autor: raivo - 25-02-2013, 09:13 PM
RE: Andurist AC lugemine - Autor: andrei - 25-02-2013, 09:48 PM
RE: Andurist AC lugemine - Autor: A.R. - 25-02-2013, 09:01 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 09:07 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 09:53 PM
RE: Andurist AC lugemine - Autor: andrei - 25-02-2013, 10:10 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 10:18 PM
RE: Andurist AC lugemine - Autor: raivo - 25-02-2013, 10:32 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 10:39 PM
RE: Andurist AC lugemine - Autor: andrei - 25-02-2013, 11:13 PM
RE: Andurist AC lugemine - Autor: W@ldur - 25-02-2013, 11:21 PM
RE: Andurist AC lugemine - Autor: madis - 26-02-2013, 12:28 AM
RE: Andurist AC lugemine - Autor: W@ldur - 26-02-2013, 12:49 AM
RE: Andurist AC lugemine - Autor: andrei - 26-02-2013, 01:33 AM
RE: Andurist AC lugemine - Autor: felch - 26-02-2013, 08:52 AM
RE: Andurist AC lugemine - Autor: A.R. - 26-02-2013, 11:09 AM
RE: Andurist AC lugemine - Autor: felch - 06-03-2013, 08:45 AM
RE: Andurist AC lugemine - Autor: A.R. - 06-03-2013, 01:02 PM
RE: Andurist AC lugemine - Autor: felch - 06-03-2013, 05:14 PM
RE: Andurist AC lugemine - Autor: A.R. - 06-03-2013, 06:51 PM
RE: Andurist AC lugemine - Autor: felch - 06-03-2013, 10:47 PM
RE: Andurist AC lugemine - Autor: W@ldur - 24-11-2013, 10:34 PM
RE: Andurist AC lugemine - Autor: martinr112 - 25-11-2013, 03:31 AM
RE: Andurist AC lugemine - Autor: W@ldur - 25-11-2013, 10:39 AM
RE: Andurist AC lugemine - Autor: martinr112 - 25-11-2013, 09:20 PM
RE: Andurist AC lugemine - Autor: madis - 26-11-2013, 12:41 AM
RE: Andurist AC lugemine - Autor: W@ldur - 08-01-2014, 12:03 PM
RE: Andurist AC lugemine - Autor: A.R. - 08-01-2014, 01:34 PM
RE: Andurist AC lugemine - Autor: W@ldur - 08-01-2014, 01:43 PM
RE: Andurist AC lugemine - Autor: A.R. - 08-01-2014, 02:38 PM
RE: Andurist AC lugemine - Autor: W@ldur - 08-01-2014, 03:21 PM
RE: Andurist AC lugemine - Autor: A.R. - 08-01-2014, 04:12 PM
RE: Andurist AC lugemine - Autor: madis - 08-01-2014, 05:39 PM
RE: Andurist AC lugemine - Autor: W@ldur - 08-01-2014, 08:20 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 11:04 AM
RE: Andurist AC lugemine - Autor: madis - 09-01-2014, 01:01 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 01:10 PM
RE: Andurist AC lugemine - Autor: A.R. - 09-01-2014, 02:32 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 02:43 PM
RE: Andurist AC lugemine - Autor: A.R. - 09-01-2014, 03:30 PM
RE: Andurist AC lugemine - Autor: madis - 09-01-2014, 05:30 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 05:40 PM
RE: Andurist AC lugemine - Autor: A.R. - 09-01-2014, 06:10 PM
RE: Andurist AC lugemine - Autor: madis - 09-01-2014, 08:01 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 09:09 PM
RE: Andurist AC lugemine - Autor: madis - 09-01-2014, 09:42 PM
RE: Andurist AC lugemine - Autor: W@ldur - 09-01-2014, 10:40 PM
RE: Andurist AC lugemine - Autor: madis - 09-01-2014, 11:24 PM
RE: Andurist AC lugemine - Autor: W@ldur - 10-01-2014, 12:00 AM
RE: Andurist AC lugemine - Autor: martinr112 - 10-01-2014, 01:56 AM
RE: Andurist AC lugemine - Autor: W@ldur - 10-01-2014, 10:37 AM
RE: Andurist AC lugemine - Autor: W@ldur - 13-01-2014, 12:31 PM
RE: Andurist AC lugemine - Autor: A.R. - 14-01-2014, 01:32 PM
RE: Andurist AC lugemine - Autor: A.R. - 21-01-2014, 10:15 AM

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