Leaf / leafmotor / leafbike high efficiency 1500w motor

Electric Motors and Controllers
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DogDipstick   100 W

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

Post by DogDipstick » Jan 23 2020 10:44am

I run a clone of this motor at 3-7Kw all day without trouble @ 80v. Gets hot but 3mm phase wires are fine.
Allota Watts @ 83.1v of raw QS power takes me everywhere on my Ironhorse DW link XC... :) Powered by Chevy. :D Broke 10 horses the other day. ( BTW; ...it will hurt you... :? )... (Currently building a battery datalogger.). :roll: Playin with (24) IRFB4115s now. :wink:

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The Toecutter   10 kW

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

Post by The Toecutter » Jan 23 2020 3:13pm

How difficult is it to change out the phase wires? Are there any guides or diagrams in this thread showing some of the process? I know there's pics located somewhere in this thread showing the motor case open, but I don't have the time to look through all of the pages to find it.

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ZeroEm   100 W

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

Post by ZeroEm » Jan 23 2020 6:58pm

I have not done it yet but there is threads on the topic, liveforphysics has a good one. In this thread neptronix talks about running bigger phase wires close to the motor to keep the smaller wires as short as possible without changing them, he states the bigger wires will help cool the small motor wires. Now not trying to talk for neptronix but you can read what he posted on it.

I will add some links on the topic and you can decide.

DIY 10awg phase leads through axle in 9C hubmotor.
viewtopic.php?f=2&t=14580&hilit=upgrade ... es#p217570

First page of this thread Neptronix talks about the phase wires that came in his motor. They used to be the same as the 1000w or the 1500w front motor. The new rear 1500w has upgraded to 3mm.
Last edited by ZeroEm on Jan 23 2020 7:13pm, edited 1 time in total.
2019 Performer E-Trike 9w/km
2013 Nissan Leaf S 8 bars 328.306w/KM

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spinningmagnets   100 GW

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

Post by spinningmagnets » Jan 23 2020 7:04pm

Here's a thread about doubling the phase wires of a BPM geared hub. Of course it's not a Leafbike 1500W, but there are a lot of similarities.

http://endless-sphere.com/forums/viewto ... 37#p758156

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The Toecutter   10 kW

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

Post by The Toecutter » Jan 26 2020 6:28pm

Thank you for sharing that link. It will come in handy soon.

Also, does anyone have figures for the hysteresis drag torque and eddy current drag torque for the Leafbike motors? I could not find these figures published anywhere, but it would be nice to calculate how much wattage I'll need to overcome the cogging losses when riding with the drive system turned off, and to also be able to compare other motors for which these figures are published.

For example, the Grin All-Axle hub motors used for front drive tadpole trikes have an eddy current drag torque of 0.0005 Nm/rpm and a hysteresis drag torque of 0.45 Nm. They are very lossy and have the thicker 0.35mm laminations.

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The Toecutter   10 kW

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

Post by The Toecutter » Feb 08 2020 8:35pm

I got a notification a bit over a week ago that my motor would have to be built. This gave me a chance to specify 3mm phase wires, with the consequence being that the protective spring could not be fit to cover the insulation of the wires bundled together through the center of the case.

The motor has not shipped yet due to the coronavirus and the resultant quarantine. I do not know when it will ship.

john61ct   100 MW

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

Post by john61ct » Feb 08 2020 9:45pm


The Toecutter wrote:torque for the Leafbike motors

Grin All-Axle hub motors
Realize OT, but anyone have a comparison for the "real world" **max torque** between these two?

I'm particularly interested in, at low rpm say standing start on a long steep hill situation.

Which dissipates heat better? I know the Grin is designed to work with statorade, is the leafbike motor?


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spinningmagnets   100 GW

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

Post by spinningmagnets » Feb 08 2020 10:14pm

The Leafbike motor responds quite well to Statorade / Ferro-Fluid

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