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D-calc@yahoogroups.com
Sep 2, 2006 10:26 am
129
Goedendag, An internet database for logging motor performance: http://www.peakeff.com/ Vriendelijke groeten ;-) Ron near Nijmegen, the Netherlands E-fly-in,...
Goedendag, An internet database for logging motor performance: http://www.peakeff.com/ Vriendelijke groeten ;-) Ron near Nijmegen, the Netherlands E-fly-in,...
I've posted this before: http://groups.yahoo.com/group/D-calc/message/61 But got no reaction at all. I've now changed the spreadsheet in such a way, that it...
Goedendag ;-) A diy electronics design by Lucien Miller for measuring motor resistance: www.rcgroups.com/forums/showthread.php?t=580151 Vriendelijke groeten...
Hello all, Drive Calculator 3.1 is now available on www.drivecalc.de This is a major update, because the database format has changed. Only the new version will...
The database update 1 includes 25 new motors and several additions to/corrections of existing records: 178x40 15Y450 227x120 9Y850 8P jw 227x50 11Y750...
Goedendag, A motor simulation with four constants: http://www.rcgroups.com/forums/showthread.php?t=674875 Vriendelijke groeten ;-) Ron -- I am using the free...
Hi yes this is true, I compared own measurements with a dynometer as well as data from Plettenberg (www.plettenberg-motoren.de). I got a wrong efficiency, i.e....
Hi yes Rm is the restistance including all and evrything, i.e. losses form motor, esc etc. The motor losses are not only because of the current running trough...
Hi the comaprison is with the german Excel version of Dcalc V221_026 (the actual one) to be downloaded: www.elektromodellflug.de, under "datenbank". Some...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the D-calc group. File : /e-motor test...
D-calc@yahoogroups.com
Jun 9, 2007 11:35 pm
148
Hi Pete, sorry, your dyno results are flawed. I. e. @49sec: 10.59V 22.63A 5636rpm Efficiency 80.4% With nsid 671.9rpm/V ideal no load rpm at 10.59V would be...
Hello Christian I can check. no-load data is not related to dyno however (torque=0) The equation set I am using is a bit different from yours, so the relations...
Hello Christian I have put the motors: Plettenberg Orbit 20-16 and 25-16 at 10V and 12V into Dcalc (Excel- version V221_026). I see there, efficiency is also...
Hi Pete, we are not talking about formulae that I have invented. It is a fundamental law that efficiency cannot exceed the relation loaded rpm/no load rpm and ...
... I have not seen any Plettenberg measurement data yet that I could feed into Drive Calculator. Remember, you have to include accurate no load data. Could...
Hi Christian In my measurements, no load is not of real relevance. So I am not looking much at it. I tried to vary the no load data in Dcalc, just to see what...
Hi Pete, no load data are most important. In fact, the no load behavior shows the amount of iron and friction loss at no load speed. That is a big part of ...
Hi Christian yes, in case you have no torque data. If you have torque-data, you do not need it. best regards Peter ... shows the ... part of ... happens. ... ...
Hi Christian I will check, respectively calibrate. The Plettenberg-Data shows in principal the same results. Waht is your opinion on the results with...
Hi Christian I checked now the dyno. The result: the precision is +-1g or 1% whatever is worse. This transfers to 0.1Ncm in torque or 1% whatever is worse. I...
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