DGoncz@aol.com
Jun25-05, 03:35 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>In recent threads in sci.electronics.design, rec.crafts.metalworking,\nand sci.physics, I have written about my attempt to convert Burden\'s\nSurplus Center #10-1134 motor into a pedal powered self-excited\ninduction generator (SEIG). The consensus is it won\'t work, and I am\ngetting ready to dispose of the evidence. :)\n\nThere are many reasons it won\'t work. The one I understand the best is\nthat when R, the winding DC resistance plus certain AC resistance\ncomponents, is greater than the square root of L*C, where L is the\nwinding inductance including the effect of the rotor, and C is an\nauxiliary capacitor across the windings to achieve self-excitation,\nthen the resonant "tank" circuit has no impedance hump, and therefore Q\n= 1.\n\nI was wondering if this is a surface to volume ratio effect. That is, R\ncomes from the cross sectional *area* of the wire selected, and L comes\nfrom the turns, in a three dimensional *volume* selected, of individual\nwires. Small objects have a higher surface to volume ratio, in general,\nthan larger ones, so for a specific design at some scale factor, R >\nsqrt(L*C).\n\nAlso, I speculate room temperature superconductors might allow small,\nslow self-excited induction generators with minimal R, and was\nwondering if anyone here agrees or disagrees with that speculation.\n\nThe motor is:\n\nhttp://surpluscenter.com/item.asp?UID=2005062415255748&catname=&qty=1&item=10-1134\n\nThe threads are:\n\nhttp://groups-beta.google.com/groups?q=author:DGoncz@+generator&start=0&scoring=d&hl=en&lr=&ie=ISO-8859-1&num=10&\n\nYours,\n\nDoug Goncz\nReplikon Research\nFalls Church, VA 22044-0394\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>In recent threads in sci.electronics.design, rec.crafts.metalworking,
and sci.physics, I have written about my attempt to convert Burden's
Surplus Center #10-1134 motor into a pedal powered self-excited
induction generator (SEIG). The consensus is it won't work, and I am
getting ready to dispose of the evidence. :)
There are many reasons it won't work. The one I understand the best is
that when R, the winding DC resistance plus certain AC resistance
components, is greater than the square root of L*C, where L is the
winding inductance including the effect of the rotor, and C is an
auxiliary capacitor across the windings to achieve self-excitation,
then the resonant "tank" circuit has no impedance hump, and therefore Q
= 1.
I was wondering if this is a surface to volume ratio effect. That is, R
comes from the cross sectional *area* of the wire selected, and L comes
from the turns, in a three dimensional *volume* selected, of individual
wires. Small objects have a higher surface to volume ratio, in general,
than larger ones, so for a specific design at some scale factor, R >
\sqrt(L*C).
Also, I speculate room temperature superconductors might allow small,
slow self-excited induction generators with minimal R, and was
wondering if anyone here agrees or disagrees with that speculation.
The motor is:
http://surpluscenter.com/item.asp?UID=2005062415255748&catname=&qty=1&item=10-1134
The threads are:
http://groups-\beta.google.com/groups?q=author:DGoncz@+generator&start=0&scoring=d&hl=en&lr=&ie=ISO-8859-1&num=10&
Yours,
Doug Goncz
Replikon Research
Falls Church, VA 22044-0394
and sci.physics, I have written about my attempt to convert Burden's
Surplus Center #10-1134 motor into a pedal powered self-excited
induction generator (SEIG). The consensus is it won't work, and I am
getting ready to dispose of the evidence. :)
There are many reasons it won't work. The one I understand the best is
that when R, the winding DC resistance plus certain AC resistance
components, is greater than the square root of L*C, where L is the
winding inductance including the effect of the rotor, and C is an
auxiliary capacitor across the windings to achieve self-excitation,
then the resonant "tank" circuit has no impedance hump, and therefore Q
= 1.
I was wondering if this is a surface to volume ratio effect. That is, R
comes from the cross sectional *area* of the wire selected, and L comes
from the turns, in a three dimensional *volume* selected, of individual
wires. Small objects have a higher surface to volume ratio, in general,
than larger ones, so for a specific design at some scale factor, R >
\sqrt(L*C).
Also, I speculate room temperature superconductors might allow small,
slow self-excited induction generators with minimal R, and was
wondering if anyone here agrees or disagrees with that speculation.
The motor is:
http://surpluscenter.com/item.asp?UID=2005062415255748&catname=&qty=1&item=10-1134
The threads are:
http://groups-\beta.google.com/groups?q=author:DGoncz@+generator&start=0&scoring=d&hl=en&lr=&ie=ISO-8859-1&num=10&
Yours,
Doug Goncz
Replikon Research
Falls Church, VA 22044-0394