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Old Aug 27, 2011, 12:01 PM
homo ludens modellisticus
Ron van Sommeren's Avatar
near Nijmegen, Netherlands
Joined Feb 2001
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Quote:
Originally Posted by BoomStriker View Post
Thanks. I must be getting old, Louis and Christo too, but mostly me
http://groups.yahoo.com/group/lrk-to.../message/12138
http://www.rcgroups.com/forums/showthread.php?t=1011712

Quote:
Originally Posted by Skylar View Post
I think that it's very fitting to mention here where the SPS (LRK) winding scheme comes from. ...
See also
http://www.aerodesign.de/peter/2001/...0_Wroclaw.html

Vriendelijke groeten Ron
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Old Aug 27, 2011, 02:07 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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Originally Posted by Skylar View Post
Jack

I've added the meaning of SPS to the first post - for the benefit of new readers of this thread. Thanks for pointing this out.

Christo
I've been lurking on the thread because it is interesting, I didn't mean criticize you for not have explained a term that everyone else seemed to understand.

But I'm sure other lurkers and future readers will be smarter for you having added it. Thanks for doing it.

Jack
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Old Aug 28, 2011, 08:13 AM
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Skylar's Avatar
South Africa, GP, Pretoria
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Emetor Kv

Hi Louis

I assume you managed to sort out the input errors in Emetor.

Do perhaps know how one can calculate or otherwise determine the Kv of a design in Emetor. I don't think they give Kv in the results.

Christo
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Old Aug 28, 2011, 12:53 PM
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Fourdan's Avatar
Antony (France)
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Quote:
Originally Posted by Skylar View Post
Hi Louis

I assume you managed to sort out the input errors in Emetor.

Do perhaps know how one can calculate or otherwise determine the Kv of a design in Emetor. I don't think they give Kv in the results.

Christo
Hi Christo
Presently I am busy in testing a lot of motors (Dualsky EA series)
Could be 2 weeks to recover some time to learn Emetor
Louis
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Old Aug 29, 2011, 04:34 AM
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No problem Louis

It should be possible to calculate Kv using the torque constant, Kt (Nm/A) which is equal to Ke (generator constant) V/(rad/sec).

Good luck with your motor testing.

Christo
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Old Aug 31, 2011, 04:07 PM
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Hi,
Intresting discusion.
Powerst kV with SPS Windung As all Wind of a Phase will See magnetic flux at the Same Time .dLRK has the Windung of a Phase on naberhod teeth where the magnetic flux has a Time Delay wirft result in a lower Induction but wirft a more rectangular Design .The Design of SPS has longer endturns by Windung the Same Count of turn As with dLRK witch result in litle higher coil résistance belobt to the lenght of the stator.
Christo:if you would like the Best you have to Wind two separate LRK or SPS motors on One Stator .First from tooth 1,3,5,7,9,11 the Second start from teeth 2,4,6,8,10,12 for a 12N stator.
The Windung Factor says how good ist the Windung used to produce magnetic Force As higher the Number As better .
some wordes spell silly but i wrote this with a ipad witch correct me with german dictionary,crasy thing.

happy amps Christian
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Old Aug 31, 2011, 04:40 PM
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South Africa, GP, Pretoria
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Originally Posted by Christian Lucas View Post
Christo:if you would like the Best you have to Wind two separate LRK or SPS motors on One Stator .First from tooth 1,3,5,7,9,11 the Second start from teeth 2,4,6,8,10,12 for a 12N stator.
Hi Christian
OK, this concept is new to me. How should the 2 windings be terminated? Joined as for one motor or separately as for 2 motors and connected to 2 speed controllers?

Quote:
some wordes spell silly but i wrote this with a ipad witch correct me with german dictionary,crasy thing.

happy amps Christian
Don't worry, I understand you perfectly. Thanks for the advice.

Gruss
Christo
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Old Aug 31, 2011, 05:43 PM
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Yes,correct ,two controler.It is than a real 6 phase motor.The SPS is like a semi 6 phase with the 3 phase using the 6 phase magnetsystem.
Best over all is to use a 2 phase controler for each coil. example 11 slot 12 Pole using 11 2 phase controler. Siemens does it in the German Fuelcell powered Submarine.
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Old Dec 09, 2012, 04:49 AM
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Hi All,

I intend to try the " 2 LRK motors on one stator with 2 controllers" approach. I'm not sure how to get a similar motor to my DD LRK though. Both motors are Scorpion S4020 12N 14P kits, the "original" LRK has 14 turns/Tooth, but coils are in parallel, not in series, about 1000RPM/V. Not sure how to achieve the same easily with 2 LRK motors...I want to see if there's a noticeable difference...

Wanted to do this a long time, I now have 2 identical YGE 100A controllers that should be ok with this config.
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Old Dec 09, 2012, 06:01 AM
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Originally Posted by WimH View Post
Hi All,

I intend to try the " 2 LRK motors on one stator with 2 controllers" approach. I'm not sure how to get a similar motor to my DD LRK though. Both motors are Scorpion S4020 12N 14P kits, the "original" LRK has 14 turns/Tooth, but coils are in parallel, not in series, about 1000RPM/V. Not sure how to achieve the same easily with 2 LRK motors...I want to see if there's a noticeable difference...

Wanted to do this a long time, I now have 2 identical YGE 100A controllers that should be ok with this config.

Hi Wim

I'd be interested in the results. Please post it here when you've succeeded.

Groetjes
Christo
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Old Dec 23, 2012, 05:00 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
near Nijmegen, Netherlands
Joined Feb 2001
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Quote:
Originally Posted by Skylar View Post
Hi Wim, I'd be interested in the results. ...
Keep an eye on this thread Christo
www.modelbouwforum.nl/.....scorpion-hk3026-hk4225-hk4020-hk4025-hk4035-buitenloper-wikkelen-42.html#post2804304

And Ralph is up to it again, iron-cobalt core
http://www.helifreak.com/showthread.php?t=481901

Met vriendelike groete Ron
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Old Dec 23, 2012, 07:14 AM
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ah , yes, forgot Skylar is from South Africa and might understand Dutch
hmm, cobalt lams were given to me by Christian Lucas once, Ralph got them in the end after Torcman butchered them up a bit, I wonder if they are the same...
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Old Dec 23, 2012, 04:57 PM
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Hello Wim,

my Holländisch is not that good ,i understand nothing .But nice to read from you.

Sorry Wim , plates are from unknowen distributor

Ron, Wim and all motorwire enthusiast worldwide.
I wish you a merry xmas .let wish come true build your owen engine.
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Old Dec 25, 2012, 11:46 AM
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Hi Christian, Merry Christmas to you and your family as wel. Basically I'm trying to (have somebody) build 2 nearly identical 1000KV Scorpion 4020 14p LRK motors, one 'true' LRK with 14 turns per tooth, DD connection (to replace my damaged selfwound 13 turns LRK) and the same motor , but 7 turns/tooth LRK*2 on 2 separate YGE100 controllers, to see if the difference is noticeable.

Wim
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Old Dec 29, 2012, 05:01 AM
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This is the last "news" I got from the "rewinder" :



about 21.5mm2 copper fill, not bad at all...
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