ron v. sommeren
05-29-2002, 07:53 PM
Do-it-yourself designing and building brushless outrunner electric motor. The motors built to date, range from 20Watt to 2kiloWatt. People are working on 3kW versions. Efficiency *can* be in the 85-90% range and there are no gear-box losses. They can be made using a relatively simple lathe (http://www.torquemax.de/Drehbank.htm).
To subscribe to the homebuilt brushless outrunner e-mail discussion group, goto
www.yahoogroups.com/group/lrk-torquemax
click 'Join' in right upper hand corner or send an empty message to
lrk-torquemax-subscribe@yahoogroups.com .
The homebuilt brushless outrunner e-motor FAQ (Word document):
---> www.yahoogroups.com/group/lrk-torquemax/
---> files
---> lrk-torquemax_FAQ.doc (Word, 93kByte)
or direct:
http://groups.yahoo.com/group/lrk-torquemax/files/lrk-torquemax_FAQ.doc
The SPS principle used (every other tooth empty of windings) features a high torque at lower rpm, compared to a conventional brushless layout. There is no need for a gearbox, which means less weight, less losses, less $$$'s, no gear noise and no gear losses. The motor can swing a bigger prop resulting in an even higher overall system efficiency. The builder can tailor the motor to the application by choosing the best number of windings. The SPS/LRK is an inside-out motor, the coils are stationary, housing and Neodym magnets ( 1.1-1.3 Tesla) rotate. This has the additional benefit of good magnet cooling and the coils are not stressed by centrifugal forces.
Met vriendelijke groet ;) Ron van Sommeren, Nijmegen, the Netherlands
• homebuilt e-motor discussion group (http://www.yahoogroups.com/group/lrk-torquemax/)
• E-fly-in & lrk-meet (http://home.hetnet.nl/~ronvans), June 23rd, Nijmegen, the Netherlands
To subscribe to the homebuilt brushless outrunner e-mail discussion group, goto
www.yahoogroups.com/group/lrk-torquemax
click 'Join' in right upper hand corner or send an empty message to
lrk-torquemax-subscribe@yahoogroups.com .
The homebuilt brushless outrunner e-motor FAQ (Word document):
---> www.yahoogroups.com/group/lrk-torquemax/
---> files
---> lrk-torquemax_FAQ.doc (Word, 93kByte)
or direct:
http://groups.yahoo.com/group/lrk-torquemax/files/lrk-torquemax_FAQ.doc
The SPS principle used (every other tooth empty of windings) features a high torque at lower rpm, compared to a conventional brushless layout. There is no need for a gearbox, which means less weight, less losses, less $$$'s, no gear noise and no gear losses. The motor can swing a bigger prop resulting in an even higher overall system efficiency. The builder can tailor the motor to the application by choosing the best number of windings. The SPS/LRK is an inside-out motor, the coils are stationary, housing and Neodym magnets ( 1.1-1.3 Tesla) rotate. This has the additional benefit of good magnet cooling and the coils are not stressed by centrifugal forces.
Met vriendelijke groet ;) Ron van Sommeren, Nijmegen, the Netherlands
• homebuilt e-motor discussion group (http://www.yahoogroups.com/group/lrk-torquemax/)
• E-fly-in & lrk-meet (http://home.hetnet.nl/~ronvans), June 23rd, Nijmegen, the Netherlands