Idiots guide to water cooled mid motor making

Electric Motors and Controllers
larsb
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Re: Idiots guide to water cooled mid motor making

Post by larsb » Dec 07, 2017 7:47 am

The LRK winding is not necessarily linked to using double controllers but since LRK is only 1-layer winding (every other tooth is wound, the rest are empty) that means if you fill half of the slot with one LRK winding, then the empty teeth can have another set of windings / "another motor" wound on them.

In sensored motors it should mean there must be two sets of halls for the two motors but i really don't know how the influence of the diferent coils will be.

Maybe John in CR can support :?:

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macribs
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Re: Idiots guide to water cooled mid motor making

Post by macribs » Dec 07, 2017 10:54 am

Maybe like most other instances of dual drive rides? It seems people really fear the sync problems if going with more then 1 drive. But from people who actually done it, they seem to report back no sync issues and no need to do anything. Hook things up and it will work. Or so it seems.

larsb
100 W
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Posts: 271
Joined: Dec 10, 2014 5:12 am
Location: Gothenburg, Sweden

Re: Idiots guide to water cooled mid motor making

Post by larsb » Dec 08, 2017 9:55 am

I don't agree with some discussed theoretical dual drive limitations (as you say).

In the case of front and rear hub motors they strive to drive a big damping weight forward together, no reason for any issues.
in case of connected motors on same belt/chain it's still a large resistance to both motors. It might be more sensitive to oscillations but i don't see a high risk.

But for magnetic fields in close distance with possible induced currents it might mean trouble and bad efficiency..
Who knows without a scope and a dyno :D

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