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lrk-torquemax · building high-torque brushless e-motors

Group Information

  • Members: 4955
  • Category: Radio-Controlled
  • Founded: Apr 24, 2001
  • Language: English
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Activity within 7 days:

9 New Members - 9 New Messages - New Questions

Description

Mailing list for discussions on designing and building brushless electric motors and controllers. The motors built so far, range from 20W to 2kW. You can also build from kits. LRK and CD-ROM outrunners have different winding diagrams!

Outrunners are inside-out motors, the coils are stationary, housing and magnets rotate. They feature a high torque AND they can rev. There is no need for a gearbox, which means less weight, less $$$/€€€'s, no losses, no whining and no wear. The motor can swing a bigger prop, resulting in a higher overall system efficiency. The builder can tailor the motor to the application by adapting the number of winds. (Motor pictures by Detlev Koch)

pictures I and tips, tricks, manuals lrk construction articles and drawings assembly manuals and FAQ winding calculation and lrk 'bible' , pictures II and controller designs

Ron van Sommeren, group 'owner' falun gong china tibet dalai tiananmen square repression censorship mao zedong Charter 08 dissidents bloodbath

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Re: Some hintsa to electrify an Ultra Light aircraft
With that sort of power you probably want to get as light of components as possible, going for high-voltage will be lighter and require less wire from the
Posted - Tue Feb 9, 2010 4:56 pm
ryanbiffard
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Some hintsa to electrify an Ultra Light aircraft
Hello all, After building my own LRK's some years ago, I'm going to do a step forward. With two other friends we have bought a Lazair ultra light aircraft,
Posted - Tue Feb 9, 2010 11:21 am
roberto51it
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Re: Can anyone help me with my motor design?
The electronic commutation (ESC or electronic speed control) converts the DC to 3-phase AC, which is applied to the stator coils. Donald.
Posted - Mon Feb 8, 2010 5:51 pm
Donald H Locker
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Re: Can anyone help me with my motor design?
Here is a link to a winding calculator http://www.bavaria-direct.co.za/models/files/Winding_Scheme_Calculator.htm Lots of other useful stuff here:
Posted - Mon Feb 8, 2010 5:46 pm
ryanbiffard
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Re: Can anyone help me with my motor design?
Great thanks. It was originally 12 coils but i removed two to give more space. Seems like it was a bad idea. Im actually building an entire electric car from
Posted - Mon Feb 8, 2010 5:00 pm
codewarrior3k
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 12 9
2009 36 43 25 16 13 73 22 92 37 51 37 18
2008 100 131 94 19 26 42 6 71 5 39 12 41
2007 52 70 34 135 179 153 63 29 26 79 52 38
2006 117 103 75 50 54 63 69 47 87 44 26 111
2005 332 117 115 185 154 103 173 158 207 120 119 111
2004 326 406 269 163 144 205 172 272 426 615 465 427
2003 166 140 99 142 194 293 190 187 226 264 237 467
2002 67 98 66 43 114 70 24 58 80 94 102 240
2001 19 17 79 70 71
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