Jul 25, 2011, 11:54 AM Registered User Joined Mar 2011 97 Posts Discussion Permanent magnet motors effective winding? I want to know about that is there any effective winding calculation for permanent magnet motors. -Is there any coefficient between gauge of wire and turns? single winding or doubled winding? Forexample I estimate that one of my motor can be winding between 0.35-0.55 mm gauged wire. And i can how can i realize that which gauged wire is the most suitable for me? and what kind of winding technic is the most suitable for me?
Jul 25, 2011, 07:05 PM
just look at it smokin'
Joined Dec 2005
1,233 Posts
Quote:
 Originally Posted by mir_as82 I want to know about that is there any effective winding calculation for permanent magnet motors. -Is there any coefficient between gauge of wire and turns? single winding or doubled winding? Forexample I estimate that one of my motor can be winding between 0.35-0.55 mm gauged wire. And i can how can i realize that which gauged wire is the most suitable for me? and what kind of winding technic is the most suitable for me?
yes, more current requires larger conductor cross-section, but you get higher Kv because less turns will fit.
 Jul 26, 2011, 01:28 AM Registered User Joined Mar 2011 97 Posts I understand it. But is there any formulization? Illustrated with motor size?motor magnets? or etc.
 Jul 28, 2011, 05:25 AM Registered User Antony (France) Joined Sep 2003 3,166 Posts Hi The best is to look at Scorpion catalog Every motor is indicated with Stator size (example S3014 means stator 30mm x 14mm stack height) Turns Wires (strands number and diameter) Kv Weight Slots, poles .. Max current Max Power For predicting you have free Scorpion Calc to play with Voltage Prop ... You get rpm, amps, thrust, pitch speed Then you have a complete design reference to make your own kit on any stator lams Louis
Jul 28, 2011, 06:28 AM
homo ludens modellisticus
Netherlands, GE, Nijmegen
Joined Feb 2001
12,055 Posts
Quote:
 Originally Posted by mir_as82 I want to know about that is there any effective winding calculation for permanent magnet motors. -Is there any coefficient between gauge of wire and turns? single winding or doubled winding? Forexample I estimate that one of my motor can be winding between 0.35-0.55 mm gauged wire. And i can how can i realize that which gauged wire is the most suitable for me? and what kind of winding technic is the most suitable for me?
See this sticky

Vriendelijke groeten Ron
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 Jul 29, 2011, 11:42 AM Scratch builder USA, PA, Telford Joined Apr 2004 1,362 Posts Yes formuli exist. It takes many calculations to determine windings. Testing and revising is the most reliable and will be necessary anyway to verify the formuli results. The number of turns determine speed, use the biggest gauge (lowest resistance) wire to fill the slot, as full as your winding machines will allow. Only resort to double wind if your gauge is too thick to wind properly. Comm fusing becomes more difficult too. Hand winding is a last resort for production quantities.
 Jul 29, 2011, 11:58 AM homo ludens modellisticus Netherlands, GE, Nijmegen Joined Feb 2001 12,055 Posts As Ken wrote. Kv x #winds = constant, Kv x Kt = 1 (in SI units, not in Burmese/Nigerian units). Now do a quick and dirty 10 (or 20) wind with thin wire. Determine Kv_10 using drill press / generator method. Number of winds needed to get desired Kv can now be calculated: #winds_desired = Kv_10 / Kv_desired x 10 (20). Manual V's turn calculator, most recent version in one of the last posts: http://www.rcgroups.com/forums/showthread.php?t=1062406 Motor forumulas, sticky in this subforum http://www.rcgroups.com/forums/showthread.php?t=587549 Prettig weekend Ron • diy motor tips • Drive Calculator • • diy motor group • Cumulus MFC • Last edited by Ron van Sommeren; Jul 29, 2011 at 12:09 PM.
 Jul 30, 2011, 05:29 AM Registered User Portugal, Aveiro Joined Aug 2010 88 Posts Good topic
 Jul 30, 2011, 08:06 AM Jack USA, ME, Ellsworth Joined May 2008 18,108 Posts This link is directly to the download for the zip file with TC5: Turn Calculator 5 - http://www.rcgroups.com/forums/showa...5&d=1278349768 And Manuel just put a file with a new simple turn calculator there too: Simple Turn Calculator - http://www.rcgroups.com/forums/showa...5&d=1311639725 Wonderful stuff, I couldn't imagine not having those to get you close on the first wind. I find working in the SI units to be a little vapid, I suppose it is OK for those that have trouble with numbers or remembering details and don't mind taking orders from the French or other people as to what numbers to use. None of our languages are perfect, why should any one of the prevailing math systems be considered to be? Jack