[Regia-NA] Electrical advice needed
J. K. Siddorn
list-regia-na@lig.net
Wed, 12 Jun 2002 02:30:36 +0100
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=20
Erm, AC motors without brushes are called Squirrel Cage motors and are =
quite common - my washing machine has one and its regulated by varying =
the voltage and current in the field coils.=20
Single phase AC generators can be built on the same principal - or at =
least, so I'm told by Tim Pullin.
I'm moving towards the capacitor solution, I think, as they are =
otherwise too simple to fail without doing so catastrophically
Regards,
Kim Siddorn.
The early bird may get the worm -
but the second mouse gets the cheese!=20
----- Original Message -----=20
From: Hrolf Douglasson=20
To: list-regia-na@lig.net=20
Sent: Tuesday, June 11, 2002 11:43 PM
Subject: Re: [Regia-NA] Electrical advice needed
Hmmm.....the capacitor may have gone, they do this sometimes, with no =
obvious signs of having done so. But it's unlikely.=20
No brushes??? Be it an AC genny, with slip rings, or a DC with a =
commutator ( or is it the other way round on a generator?), it should =
have carbon brushes in it somewhere, or it really ain't gonna work!
The other thing to do is put your multimeter onto AC Volts, put =
the probes into the output socket and fire it up, then measure the =
output voltages. If you have voltage under this no-load condition, then =
reconnect your load (known good power tool, etc), and measure again with =
that switched on. If there is no voltage, then you may have a problem in =
the windings, in which case- bin it.
Good Luck
hrolf
----- Original Message -----=20
From: J. K. Siddorn=20
To: Regia UK E-group ; list-regia-na@lig.net=20
Sent: Tuesday, June 11, 2002 4:44 PM
Subject: [Regia-NA] Electrical advice needed
I have just bought another 240/110V generator. It was cheap because =
the generator doesn't. Haverhill generators appear to have departed this =
life, so I can't ask them. It is a 2 KVA unit.=20
The engine (5hp Briggs and Stratton) works fine, fires up and runs =
straight away, but almost nothing comes out of the genny. I plugged a =
power tool into it and it just turns very slowly and intermittently. I =
don't have any 110V power tools, so I can't check that side.
I've checked the connections inside the plastic cover with a multi =
meter, getting continuity everywhere and no current going to earth. =
There are no brushes fitted (no slip ring) and there is a big capacitor =
under the plastic cover (5" x 1")=20
There appears to be no damage either physical or electrical.
Any ideas what I should check next???
Regards,
Kim Siddorn.
The early bird may get the worm -
but the second mouse gets the cheese!=20
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<BODY bgColor=3D#ffffff>
<DIV>
<P class=3DMsoNormal>Erm, AC motors without brushes are called Squirrel =
Cage=20
motors and are quite common - my washing machine has one and its =
regulated by=20
varying the voltage and current in the field coils. <SPAN=20
style=3D"FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=3DMsoNormal> Single phase AC generators can be built on =
the same=20
principal - or at least, so I'm told by Tim Pullin.<o:p></o:p></P>
<P class=3DMsoNormal> <SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Garamond; =
mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times =
New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; =
mso-bidi-language: AR-SA">I'm=20
moving towards the capacitor solution, I think, as they are otherwise =
too simple=20
to fail without doing so catastrophically</SPAN></P>
<P class=3DMsoNormal><SPAN=20
style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Garamond; =
mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times =
New Roman'; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; =
mso-bidi-language: AR-SA"></SPAN><BR>Regards,</P></DIV>
<DIV> </DIV>
<DIV><BR>Kim Siddorn.</DIV>
<DIV> </DIV>
<DIV>The early bird may get the worm -<BR>but the second mouse gets the =
cheese!=20
</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3DHrolf@btinternet.com =
href=3D"mailto:Hrolf@btinternet.com">Hrolf=20
Douglasson</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dlist-regia-na@lig.net=20
href=3D"mailto:list-regia-na@lig.net">list-regia-na@lig.net</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, June 11, 2002 =
11:43=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [Regia-NA] =
Electrical advice=20
needed</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Hmmm.....the capacitor may have gone, =
they do=20
this sometimes, with no obvious signs of having done so. But it's =
unlikely.=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> No brushes??? Be =
it an AC=20
genny, with slip rings, or a DC with a commutator ( or is it the other =
way=20
round on a generator?), it should have carbon brushes in it somewhere, =
or it=20
really ain't gonna work!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> The other thing to =
do is put=20
your multimeter onto AC Volts, put the probes into the output socket =
and fire=20
it up, then measure the output voltages. If you have voltage under =
this=20
no-load condition, then reconnect your load (known good power tool, =
etc), and=20
measure again with that switched on. If there is no voltage, then you =
may have=20
a problem in the windings, in which case- bin it.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2> Good =
Luck</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2> hrolf</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dkim.siddorn@blueyonder.co.uk=20
href=3D"mailto:kim.siddorn@blueyonder.co.uk">J. K. Siddorn</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dregia@yahoogroups.com=20
href=3D"mailto:regia@yahoogroups.com">Regia UK E-group</A> ; <A=20
title=3Dlist-regia-na@lig.net=20
href=3D"mailto:list-regia-na@lig.net">list-regia-na@lig.net</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, June 11, 2002 =
4:44=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [Regia-NA] =
Electrical advice=20
needed</DIV>
<DIV><BR></DIV><FONT face=3DGaramond>
<DIV> I have just bought another 240/110V generator. It was =
cheap=20
because the generator doesn't. Haverhill generators appear to have =
departed=20
this life, so I can’t ask them. It is a 2 KVA unit.=20
<P class=3DMsoNormal> The engine (5hp Briggs and Stratton) =
works fine,=20
fires up and runs straight away, but almost nothing comes out of the =
genny.=20
I plugged a power tool into it and it just turns very slowly and=20
intermittently. I don’t have any 110V power tools, so I =
can’t check that=20
side.</P>
<P class=3DMsoNormal> I’ve checked the connections inside =
the plastic=20
cover with a multi meter, getting continuity everywhere and no =
current going=20
to earth. There are no brushes fitted (no slip ring) and there is a =
big=20
capacitor under the plastic cover (5” x 1”) </P>
<P class=3DMsoNormal> There appears to be no damage either =
physical or=20
electrical.</P>
<P class=3DMsoNormal> Any ideas what I should check =
next???<SPAN=20
style=3D"FONT-FAMILY: 'Times New =
Roman'"><o:p></o:p></SPAN></P><BR>Regards,</DIV>
<DIV> </DIV>
<DIV><BR>Kim Siddorn.</DIV>
<DIV> </DIV>
<DIV>The early bird may get the worm -<BR>but the second mouse gets =
the=20
cheese! </DIV>
<DIV> </DIV>
<DIV></FONT> </DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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