Motor Data - test bench data for several hundred brushless motors. - Page 23 - RC Groups
 This thread is privately moderated by Dr Kiwi, who may elect to delete unwanted replies.
 Nov 24, 2010, 02:06 PM Registered User We have Murphy over here too JJ, in polite circles, Sod is a little less refined....but then to them it is just turf....so it's perfectly OK.
 Dec 01, 2010, 06:45 AM Registered User one thing I havn't seen anyone talk about is the phase beteewn I and E. In and Inductor the E otherwise known as the voltage leads the current otherwise known as I by 90 degrees. Now and in the resistance and you get even more of a phase shift. Now we know that since we are dealing with an inductor as the frequency goes up so does the impedance creating even more phase shift. Also because we are dealing with magnetic fields that are expanding an collapasing we have to look as hysteresis( residual) magnatism and eddy currents all a factor of the airgap, the material the winding are wound on and the strenght of the permanent magnet ie it's flux densisty. We also have to look at the internal z ( impedance) of the esc because it to is a factor in the phase shift beteewn I and E. Bringing the I an E into phase decrease the heat and increases power (I times E) But because this is not a dc circut any more and you cannot simply mutiply I times E because they are not in phase. You have to know the phase shift beteewn the 2 in order to get a proper wattage reading. Many manuf of large industrail motors take all this in account an add in a cap to do this with and they call this the power factor. You see a cap is exactly oppsite of an inductor there by subbtacting it's impedance. The impedance of an inductor is 2 pi fL where pi is 3.14, f is frequency and L is the inductance in henrys. the impedance of a cap is 1 over 2pifC where c is the value of the cap. So you see there are many many factors involved in our little motors Last edited by kerwin50; Dec 21, 2010 at 06:59 PM.
 Dec 08, 2010, 09:42 AM Registered User Hello everyone, I hope someone here can help me. I bought a HXM2730 1300Kv motor from Hobbyking, waited for what felt like years for it to come. When it did arrive i managed to pull one of the wires off the motor befor i even got to use it. What i need is a winding diagram for a 12 toothe stator with 16 magnets. I have never wound a motor before but now seem like as good a time as any to start learning but i cant find to right diagram anywhere. Please help.
 Dec 08, 2010, 09:43 AM Registered User sorry about the typos. i wrote the above with my feet.
 Dec 08, 2010, 11:51 AM Registered User Send a PM to "Timocharis" (Dave North)... he is one of the winding gurus on RC Groups.
 Dec 08, 2010, 02:27 PM Registered User thanks. i'll do tha.
Dec 08, 2010, 05:21 PM
Curiouser and curiouser
Quote:
 Originally Posted by mike300765 Hello everyone, I hope someone here can help me. I bought a HXM2730 1300Kv motor from Hobbyking, waited for what felt like years for it to come. When it did arrive i managed to pull one of the wires off the motor befor i even got to use it. What i need is a winding diagram for a 12 toothe stator with 16 magnets. I have never wound a motor before but now seem like as good a time as any to start learning but i cant find to right diagram anywhere. Please help.
This may be the thread you are looking for.
https://www.rcgroups.com/forums/show....php?t=1025188

Walt
 Dec 08, 2010, 05:57 PM Registered User Thanks. for the help
 Dec 16, 2010, 11:43 AM Registered User I've looked around and can't find a thread that mentions motor timing, I've always wondered if timing would help any of my motor applications as far as changing motor timing with the ESC, any help with refering me to a thread or a strait out answer from one of the knowledgable folks out there would be great. George
 Dec 16, 2010, 12:42 PM Registered User Here is a timing article that might help you http://homepage.mac.com/kmyersefo/timing/timing.htm
 Dec 16, 2010, 12:58 PM Registered User Interesting read, but I think it's way over my head! I think I'll just use the "recomended" settings and continue being in the dark! George
 Dec 18, 2010, 04:23 PM Registered User Paraphrasing the gist of Ken's fine article, if I may... "most of the time, 'low advance' works best".
 Dec 19, 2010, 07:53 PM Registered User I got that much out of it Phil! Thank you! George
 Dec 22, 2010, 02:14 PM Registered User Robert has just added a bunch of motors from my recent testing: there are now 518 motors in the database.