Gentleman, First, let's remember that we are discussing hobby motors here. Second, we (I work as a Motor Design Engineer with a large aerospace company)have...
Thanks Guys I appreciate all the input. That settles it (for me). And I'm not only referring to Tom's message; also others' like Herbert's, etc. I've been...
Here is another question to "those that are in the know". For the purpose of calculating motor constants: Should the no-load (Io) current be measured: 1. At...
building high-torque brushless e-motorsI can't remember the original question exactly - but maybe the it (or the response of NOT using various thickness...
Mark I don't see your point. All strands are wound together (as if a single wire), so they are all the same length. If you've wound with more than one wire...
I'm sorry but i don't agree with your conclusions as there are as much saying it's not good as are saying it is? also remember we are not talking about DC...
Hi Phil I just said that "I'm convinced". If you come to a different conclusion, then it's fine. :-) It's a bit like the "mode wars" on some forums... ;-)...
Theories as much as members. As well as novelphobia. I like new ideas. At that very easy to try. Needs only ("only" ;-) to build two identical motors. One...
Hi actually none of them is right. I0 in the motor euation is not the I0 you can measure at the motorwires. In fact I made measurements and it turned out that...
Hi christo i did not mean my post to come across like that, i meant only that i would like to get to the truth of this matter for the better knowledge of us...
building high-torque brushless e-motors Christo, Somehow my message got a bit screwed up. My point being that if you have equal lengths and wind equal turns of...
Hi Peter I tend to agree with you, although, not entirely. Since in a brushless motor, Io or "no load" loss, is made up of i.e. bearing friction loss,...
Im stranded wire guy, but have to admit that brotherhood from Solid Wire School - they are made great things too - Hereby 36 slot 12 pole one turn overlapped...
Schön, Herbert - very fine proposition! As the total current * turns makes up for the torque you will have a lower resistive voltage drop with the larger...
Schön, Herbert - very fine proposition! As the total current * turns makes up for the torque you will have a lower resistive voltage drop with the larger...
Hi yes all the measurements should be done when the motor is warm or hot (operating temeperature). I measure these values from no load to the point where...
Not with the wire form those guys but i did try some square enamelled wire and i found it a pain to get close enough to the teeth when turning round the dead...
Hi If you tolerate approximations, OK. Only one figure CONSTANT for Io and Rm (like D-Calc) If you want a "refined" prediction you have to change Io and Rm by...
Hi Christo Better Io function of rpm and iron temperature Louis ... De : Christo van der Merwe <skylar@...> À : lrk-torquemax@yahoogroups.com Envoyé...
Hi yes you are right, if you go deeper you would need more complicated equations than using a model of only few constants: Rm, Io, ns, kns. However I tried to...
Hi yes, in big machines (electric power generators) they have temperature sensors right in the windings at different locations. This could be done, but for...
Hi Yes but applications could be different 1) Gliders = often short climbing (8-12 seconds) 2) Planes = 6-15 minutes not 100% full throttle 3) Helicos = full...
Goedendag peekay ;-) ... http://en.wikipedia.org/wiki/Bifilar_coil Vriendelijke groeten ;-) Ron van Sommeren near Nijmegen, the Netherlands -- I am using the...
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