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Re: Rif: [femm] torque computation
Thanks Giovanni,
i'll try this¡¡
Diego Pérez
-------Original Message-------
From: femm@xxxxxxxxxxxxxxx
Date: viernes, 18 de enero de 2002 15:35:51
To: femm@xxxxxxxxxxxxxxx
Subject: Rif: [femm] torque computation
To achieve a better approximation in non-linear harmonic computation I
perform two steps.
1- Run at frequency 0 and verify mur in the main areas (yokes, tooths)
and establish a mean value (generall between 50 and 300),
2- Insert this new mur in material's properties, open small saturated
area (as David suggested) and re-run at your frequency.
If saturation is very different between areas, two or more different
marerials may be used with the same B-H curve, but with different mur.
Anyway it remains an approximation, and only a test can allow you to know
how far your risult is from reality.
bye
_______________________________
ing. G.Bortolan
Sincro srl
via Tezze, 3 loc. Cereda
36073 Cornedo Vicentino (VI)
Tel: (++39) 0445 450 500
Fax: (++39) 0445 446 222
e-mail: Giovanni.Bortolan@xxxxxxxxxxxxx
tecnico.sincro@xxxxxxxxxxxxx
REA 194515/VI
Reg. Imp. 20968/VI 116
P.IVA 01925820241
"Diego Perez
Lara" Per: "David Meeker, Ph.D." <dmeeker@xxxxxxxxxxxxxxxxx>,
<diego.perez.lar <femm@xxxxxxxxxxxxxxx>
@terra.es> Cc:
Oggetto: [femm] torque computation
17/01/2002 20:13
Per favore,
rispondere a
femm
Dear all,
I have some problems calculating torque of an induction motor. When i'm
doing a harmonic
analisys, femm doesn't take into account B-H curve and i put a linear mu,
but i can't
achieve a valid result. i'm simulating a quarter of the motor but if i rise
up mu, induction
is huge. Do you have any clue to solve problem?
i'm calculating torque from stress maxwell's tensor across a centered curve
round the airgap
with a fine mesh in it.
Thank you
Diego Pérez
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<DIV>Thanks Giovanni,</DIV>
<DIV>i'll try this¡¡</DIV>
<DIV> </DIV>
<DIV>Diego Pérez</DIV>
<DIV> </DIV>
<DIV id=IncrediOriginalMessage><I>-------Original Message-------</I></DIV>
<DIV> </DIV>
<DIV id=receivestrings>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>From:</B></I> <A
href="mailto:femm@xxxxxxxxxxxxxxx";>femm@xxxxxxxxxxxxxxx</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>Date:</B></I> viernes,18 de
enero de 2002 15:35:51</DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>To:</B></I> <A
href="mailto:femm@xxxxxxxxxxxxxxx";>femm@xxxxxxxxxxxxxxx</A></DIV>
<DIV dir=ltr style="FONT-SIZE: 11pt" <i><B>Subject:</B></I> Rif: [femm]
torque computation</DIV></DIV>
<DIV> </DIV><BR>To achieve a better approximation in non-linear
harmonic computation I<BR>perform two steps.<BR>1- Run at frequency 0and
verify mur in the main areas (yokes, tooths)<BR>and establish a mean value
(generall between 50 and 300),<BR>2- Insert this new mur in material's
properties, open small saturated<BR>area (as David suggested) and re-run
at your frequency.<BR>If saturation is very different between areas, two
or more different<BR>marerials may be used with the same B-H curve, but
with different mur.<BR>Anyway it remains an approximation, and only atest
can allow you to know<BR>how far your risult is from
reality.<BR><BR>bye<BR>_______________________________<BR>ing.
G.Bortolan<BR><BR>Sincro srl<BR>via Tezze, 3 loc. Cereda<BR>36073 Cornedo
Vicentino (VI)<BR>Tel: (++39) 0445 450 500<BR>Fax: (++39) 0445 446
222<BR>e-mail: <A
href="mailto:Giovanni.Bortolan@xxxxxxxxxxxxx";>Giovanni.Bortolan@xxxxxxxxxxxxx</A><BR><A
href="mailto:tecnico.sincro@xxxxxxxxxxxxx";>tecnico.sincro@xxxxxxxxxxxxx</A><BR><BR>REA
194515/VI<BR>Reg. Imp. 20968/VI 116<BR>P.IVA
01925820241<BR><BR><BR><BR><BR>"Diego Perez <BR>Lara" Per: "David Meeker,
Ph.D." &<A
href="mailto:lt;dmeeker@xxxxxxxxxxxxxxxxx";>lt;dmeeker@xxxxxxxxxxxxxxxxx</A>>,
<BR><diego.perez.lar &<A
href="mailto:lt;femm@xxxxxxxxxxxxxxx";>lt;femm@xxxxxxxxxxxxxxx</A>>
<BR><A href="mailto:@terra.es";>@terra.es</A>> Cc: <BR>Oggetto: [femm]
torque computation <BR>17/01/2002 20:13 <BR>Per favore, <BR>rispondere a
<BR>femm <BR><BR><BR><BR><BR><BR><BR>Dear all, <BR><BR>I have some
problems calculating torque of an induction motor. When i'm doing a
harmonic <BR>analisys, femm doesn't take into account B-H curve and iput
a linear mu, but i can't <BR>achieve a valid result. i'm simulating a
quarter of the motor but if i rise up mu, induction <BR>is huge. Do you
have any clue to solve problem? <BR>i'm calculating torque from stress
maxwell's tensor across a centered curve round the airgap <BR>with a fine
mesh in it. <BR><BR>Thank you <BR><BR>Diego Pérez
<BR><BR><BR><BR><BR><BR><BR><BR><BR><BR><BR>____________________________________________________<BR>(Embedded
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