Re: Aw: Re: [EVGRAY] Most lightning active point on planet

Body

Hi DougIt is so good that you have access to our collective memorry banks.My poor brain needs all the coddling, and urging, to keep on track, it can get.I appreciate your records, as collectively, we can only improve our knowledge if we get accurate information to begin with.I now have an oscilloscope, thanks to the support from electrical engineer, and Tesla experimenter, here, Steve Jackson, who knows how I can tighten up my measurements.I have found that most permanent magnet DC motors can handle a lot more voltage than stated on the case.The big limitation seems to be the little wimpy shafts, being only 5/8".A "chopped" 600 volts, into a 24 volt motor, can twist off the shaft, when suddenly changing direction, from experience. The diode full wave rectifier at the brushes seems to eliminate arc welder quality sparks from the armature, that normally cause a rapid motor melt down, destroying the copper commutators under the brushes, which then can fly off causing shrapnel if there is an opening in the case, at the brushes.For the most part, these heavy duty permanent magnet motors tolerate a lot of abuse.I wish there was a way that Ole could get some surplus ones in Germany.I can't believe that obsolete equipment does not exist there, that needs to be disposed of, that contains permanent magnet dc electric motors.We need more fat people, who are offended by their loved ones, giving them electric tread mills, which end out at the curb in the garbage, like here in Canada. Scrapped powered wheel chairs? My motor surplus was from main frame computer tape drives as used in banks, and insurance companies, using those room filling IBM's. Indiana General motors, made in Mexico, and also Daton, made in USA.All of these motors can be used. Baldor makes nice ones. I am not famiiliar with German supply networks, and how they get rid of obsolete technology, like I am, here, in Canada.This is a series of experiments that should be replicated.Cheers Warren
Sent from Yahoo Mail on Android 
 
  On Mon, Dec 11, 2017 at 7:37 AM, [email protected] [EVGRAY]<[email protected]> wrote:       


Hi Warren

I was sure I read that your amperage stayed constant as you added the daisy chain of DC motors, so I did a search of old postings, and found this from you posted may 30 2014 talking about your DC motor FWBR connected daisy chain:

Also I read in the back postings,  that eventually you got up to 10 motors but maybe you were thinking six packs of talls for all your friends there haha




"After about 7 of them, the voltage clearly grew from the initial 35 volts to nearly 90, while the 1.5 input amps stayed constant"




Also even better than shottkys, (I think) are the ultra-fast or "hyper-fast" diodes they make now that can handle 25A and 600V like the HFA25PB60, which is called an "ultra fast" one, and they have now those "hyper fast" ones for sale, that handle same power, but even faster - mcannot remember the model number but should be in any search if you do hyper fast diode 25A 600V

Who knows maybe you could have 180V at end of the string of motors and problem now is those motors rated at 96VDC tops usually...

I think the voltage rating of 96VDC can be exceeded if you bridge with FWBR the brushes, and put the DC into a cap or something else so that you are extracting that spark flash as those "destructive transients" are what eat up the brushes and commutators and are the real voltage-limiters...

ciao

Kone

  #yiv9343814235 #yiv9343814235 -- #yiv9343814235ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv9343814235 #yiv9343814235ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv9343814235 #yiv9343814235ygrp-mkp #yiv9343814235hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv9343814235 #yiv9343814235ygrp-mkp #yiv9343814235ads {margin-bottom:10px;}#yiv9343814235 #yiv9343814235ygrp-mkp .yiv9343814235ad {padding:0 0;}#yiv9343814235 #yiv9343814235ygrp-mkp .yiv9343814235ad p {margin:0;}#yiv9343814235 #yiv9343814235ygrp-mkp .yiv9343814235ad a {color:#0000ff;text-decoration:none;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ygrp-lc {font-family:Arial;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ygrp-lc #yiv9343814235hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ygrp-lc .yiv9343814235ad {margin-bottom:10px;padding:0 0;}#yiv9343814235 #yiv9343814235actions {font-family:Verdana;font-size:11px;padding:10px 0;}#yiv9343814235 #yiv9343814235activity {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}#yiv9343814235 #yiv9343814235activity span {font-weight:700;}#yiv9343814235 #yiv9343814235activity span:first-child {text-transform:uppercase;}#yiv9343814235 #yiv9343814235activity span a {color:#5085b6;text-decoration:none;}#yiv9343814235 #yiv9343814235activity span span {color:#ff7900;}#yiv9343814235 #yiv9343814235activity span .yiv9343814235underline {text-decoration:underline;}#yiv9343814235 .yiv9343814235attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;}#yiv9343814235 .yiv9343814235attach div a {text-decoration:none;}#yiv9343814235 .yiv9343814235attach img {border:none;padding-right:5px;}#yiv9343814235 .yiv9343814235attach label {display:block;margin-bottom:5px;}#yiv9343814235 .yiv9343814235attach label a {text-decoration:none;}#yiv9343814235 blockquote {margin:0 0 0 4px;}#yiv9343814235 .yiv9343814235bold {font-family:Arial;font-size:13px;font-weight:700;}#yiv9343814235 .yiv9343814235bold a {text-decoration:none;}#yiv9343814235 dd.yiv9343814235last p a {font-family:Verdana;font-weight:700;}#yiv9343814235 dd.yiv9343814235last p span {margin-right:10px;font-family:Verdana;font-weight:700;}#yiv9343814235 dd.yiv9343814235last p span.yiv9343814235yshortcuts {margin-right:0;}#yiv9343814235 div.yiv9343814235attach-table div div a {text-decoration:none;}#yiv9343814235 div.yiv9343814235attach-table {width:400px;}#yiv9343814235 div.yiv9343814235file-title a, #yiv9343814235 div.yiv9343814235file-title a:active, #yiv9343814235 div.yiv9343814235file-title a:hover, #yiv9343814235 div.yiv9343814235file-title a:visited {text-decoration:none;}#yiv9343814235 div.yiv9343814235photo-title a, #yiv9343814235 div.yiv9343814235photo-title a:active, #yiv9343814235 div.yiv9343814235photo-title a:hover, #yiv9343814235 div.yiv9343814235photo-title a:visited {text-decoration:none;}#yiv9343814235 div#yiv9343814235ygrp-mlmsg #yiv9343814235ygrp-msg p a span.yiv9343814235yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;}#yiv9343814235 .yiv9343814235green {color:#628c2a;}#yiv9343814235 .yiv9343814235MsoNormal {margin:0 0 0 0;}#yiv9343814235 o {font-size:0;}#yiv9343814235 #yiv9343814235photos div {float:left;width:72px;}#yiv9343814235 #yiv9343814235photos div div {border:1px solid #666666;min-height:62px;overflow:hidden;width:62px;}#yiv9343814235 #yiv9343814235photos div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}#yiv9343814235 #yiv9343814235reco-category {font-size:77%;}#yiv9343814235 #yiv9343814235reco-desc {font-size:77%;}#yiv9343814235 .yiv9343814235replbq {margin:4px;}#yiv9343814235 #yiv9343814235ygrp-actbar div a:first-child {margin-right:2px;padding-right:5px;}#yiv9343814235 #yiv9343814235ygrp-mlmsg {font-size:13px;font-family:Arial, helvetica, clean, sans-serif;}#yiv9343814235 #yiv9343814235ygrp-mlmsg table {font-size:inherit;font:100%;}#yiv9343814235 #yiv9343814235ygrp-mlmsg select, #yiv9343814235 input, #yiv9343814235 textarea {font:99% Arial, Helvetica, clean, sans-serif;}#yiv9343814235 #yiv9343814235ygrp-mlmsg pre, #yiv9343814235 code {font:115% monospace;}#yiv9343814235 #yiv9343814235ygrp-mlmsg * {line-height:1.22em;}#yiv9343814235 #yiv9343814235ygrp-mlmsg #yiv9343814235logo {padding-bottom:10px;}#yiv9343814235 #yiv9343814235ygrp-msg p a {font-family:Verdana;}#yiv9343814235 #yiv9343814235ygrp-msg p#yiv9343814235attach-count span {color:#1E66AE;font-weight:700;}#yiv9343814235 #yiv9343814235ygrp-reco #yiv9343814235reco-head {color:#ff7900;font-weight:700;}#yiv9343814235 #yiv9343814235ygrp-reco {margin-bottom:20px;padding:0px;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ov li a {font-size:130%;text-decoration:none;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ov li {font-size:77%;list-style-type:square;padding:6px 0;}#yiv9343814235 #yiv9343814235ygrp-sponsor #yiv9343814235ov ul {margin:0;padding:0 0 0 8px;}#yiv9343814235 #yiv9343814235ygrp-text {font-family:Georgia;}#yiv9343814235 #yiv9343814235ygrp-text p {margin:0 0 1em 0;}#yiv9343814235 #yiv9343814235ygrp-text tt {font-size:120%;}#yiv9343814235 #yiv9343814235ygrp-vital ul li:last-child {border-right:none !important;}#yiv9343814235