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Kolik polu to ma? Ja testoval tyy rotory vzdy tak, ze jsem meril
odpor mezi sousednimi poly. Musi to sedet. <br>
To same pak indukcnost, mezizavitovy zkrat zmensi indukcnost na
merenych polech.<br>
Ale vetsinou problem odhalilo uz mereni odporu.<br>
U tripoloveho rotoru, kdy kazdy pol je samostatne motany pak
funguje mnohem lepe mereni indukcnosti.<br>
U motoru se silnymi draty ( na mala napeti ) odhali mezizavitovy
zkrat spise ta jina indukcnost,<br>
U motoru na vetsi napeti pak funguje dobre mereni odporu vetsinou
je toho speceno vic, ne jen jeden zavit.<br>
<br>
Pouzival jsem nejaky poloautomaticky mustek od Tesly (BM509? ),
kde slo merit i Q vinuti. Pokud tam byl mezizavitovy zkrat, tak se
to projevilo mnohem vice nez ona indukcnost.<br>
<br>
<br>
Sveho casu jsem opravoval napr. rotory dynama u starych Java250
motorek. Kdyz byl problem jen na jednom polu, stacilo prislusne
vinuti odpojit u komutatoru,<br>
komutator "stocit" na soustruhu , protoze byl opaleny, vymenit
uhliky<br>
a dynamo vesele dynamovalo dal. Tedy uz asi ne tak dobre, ale
rozdil v nabijecim proudu byl minimalni. Cena toho rotoru byla
tenkrat 600 kč.<br>
<br>
Dne 11.2.2013 10:26, Tomáš Dresler napsal(a):<br>
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<p class="MsoNormal">Zdravim pritomne elektricky vzdelane kolegy
a mam dotaz:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jak celkem spolehlive detekovat
mezizavitovy zkrat v komutatorovem motoru?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">Vnejsi charakteristika: odpalil vykonovy
tranzistor na ridici desce behaciho pasu, po oprave vyhazuje
pojistky.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">Vnitrni charakteristika: odpor vinuti kolem
stovky Ohm, b-emf generuje v urovni stovky V, takze laickym
el. okem by “mel fungovat”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">Dekuji!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">--<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">S pozdravem<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US">Tomas Dresler<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:CS"
lang="EN-US"><a class="moz-txt-link-freetext" href="http://edisonovo.info">http://edisonovo.info</a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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