Leaf / leafmotor / leafbike high efficiency 1500w motor

Electric Motors and Controllers
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madin88
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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by madin88 » Sep 20, 2017 11:34 am

there are three different types of controllers:

- trapezoidal
- sinewave
- sinewave with FOC

FOC is the most efficient at low RPM (high torque) and also at high RPM.

AlanB has attached a pdf here if you like to read more: https://endless-sphere.com/forums/viewt ... 6#p1319953

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by markz » Sep 26, 2017 4:02 am

The post about the Sinewave Silence Silent being More Torque
Been kicking around my brain

Justin_le has got a post about that
https://endless-sphere.com/forums/viewt ... e#p1197760

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Ecky » Dec 06, 2017 12:04 pm

If I wanted to achieve ~45mph @ 72v nominal with a 20 inch rim, that would be approximately 730RPM loaded, right? What would that be, 4T?

EDIT: This is a big thread to read, but what do I need to do to make sure I get a version which can take a freewheel cassette?

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by amberwolf » Dec 06, 2017 2:04 pm

Do you want a freewheel, or a cassette? They're two different things.

Freewheel ahs threads, cassette has splines.

Ask the vendor for a good picture of that side of the motor before you order, since they won't likely have a clue which is which.

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Ecky » Dec 06, 2017 2:08 pm

My apologies, I saw a post ealier in the thread which mentioned they had a "freewheeling cassette", and thought to ask about it. It appeared they were shipping retrofits for putting cassettes onto older cassette-less motors?

Cassette is definitely preferable. I'll make sure to clarify. Seems to me they would benefit from having some "options" on their ordering page, rather than making every motor a one-off.

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by cycborg » Dec 06, 2017 2:29 pm

Ecky wrote:
Dec 06, 2017 2:08 pm
My apologies, I saw a post ealier in the thread which mentioned they had a "freewheeling cassette", and thought to ask about it. It appeared they were shipping retrofits for putting cassettes onto older cassette-less motors?

Cassette is definitely preferable. I'll make sure to clarify. Seems to me they would benefit from having some "options" on their ordering page, rather than making every motor a one-off.
Splined version for cassette

Threaded version for freewheel

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Ecky » Dec 06, 2017 2:31 pm

It appears to not be specified when ordering an already-built wheel, so I guess I'll reach out via email.

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Dumsterdave » Apr 11, 2018 6:04 am

Anyone have experience work the "new 2018" hub?

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by cwah » Apr 11, 2018 7:04 am

Dumsterdave wrote:
Apr 11, 2018 6:04 am
Anyone have experience work the "new 2018" hub?
Link?
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Dumsterdave » Apr 11, 2018 7:55 am

cwah wrote:
Apr 11, 2018 7:04 am
Dumsterdave wrote:
Apr 11, 2018 6:04 am
Anyone have experience work the "new 2018" hub?
Link?
http://m.leafbike.com/mobile/products_d ... ?ProId=998

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by cwah » Apr 11, 2018 1:41 pm

Thanks. Looks like efficiency didn't increase with the new hub
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by flat tire » Apr 18, 2018 8:03 pm

So I burned one of these Leafs out after a few hundred miles of 200 phase amps max, 80 amps @ 80 volts battery. Not sure which winding but it went 60 mph. Running a second motor but of course it's different KV and doesn't go 50+ so it will be necessary to really turn down the phase current unless I want to throw away another $350. :(

Anyone else burn one of these out lately?

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by spinningmagnets » Apr 18, 2018 9:08 pm

200 phase amps max, 80 amps @ 80 volts battery. Not sure which winding but it went 60 mph
For 60-MPH and 80A X 80V = 6400W, I would go straight to the QS 205/50H V3. It would provide more torque at those input watts, and I suspect it might last the rest of your life...

Even the MXUS Turbo3K would do better than the Leafbike. Here are the widths of the stators (and indicator of magnet power and copper mass)

35mm___Leafbike
45mm___MXUS
50mm___QS 205

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by Cowardlyduck » Apr 18, 2018 9:48 pm

I push my poor little Leaf motor at about 6KW, but I have active fan forced air cooling, Ferro Fluid, and Heat-sinks to shed all the heat when I do crank it up and I do regularly hit 140C before it rapidly cools off.
Most of the time it's cruising at 2-3KW though which the cooling can keep up with and keep temps well below 80C.

If you gonna push a '1500W' motor at 6KW you better be prepared to cool it well. :)

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by flat tire » Apr 19, 2018 5:14 pm

Yeah I have a QS205 running at 120 volts 150 amps battery. It's faster than the leaf :D

The phase current + low speed trail riding over obstacles is what killed my Leaf not the 6kw. I would rarely use the 6kw anyway. Just in short bursts.

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Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Post by markz » Apr 24, 2018 2:20 am

spinningmagnets wrote:
Apr 18, 2018 9:08 pm

35mm___Leafbike
45mm___MXUS
50mm___QS 205
MXUS has the 5kw motor it is 55H, just another one to check the pricing on is all.

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