Steel-geared hub motor?

Electric Motors and Controllers
Gab
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Re: Steel-geared hub motor?

Post by Gab » Jun 01, 2014 6:57 am

if you think helical makes no noticeable difference to power, their is a good example on the currie motors

https://endless-sphere.com/forums/viewto ... 6&start=25

For the older MY1018z with strait cut gears and the the newer XYD-16 with helical gears.

Both motors are the exact same size and the only difference is the gearbox teeth.
Postby veloman » Tue Sep 04, 2012 2:50 pm

What makes the newer currie motor less powerful? It's the same size I believe. I just picked up a cheap ezip ecoride on craigslist, for the quiet currie motor on it. I plan to either add it on my main 9c ebike, or do a lightweight build with it as a mid drive to the front chainrings like my old ebike builds.
Re: Currie-EZip ebike Kit $289.88 - Amazon.com

Postby DrkAngel » Fri Jul 22, 2011 1:32 pm

I finally had a chance, to take a good look at the motor on my latest EZip.
I felt it to be different for 2 reasons.
1. It seemed to have slightly less power, than earlier motors.
2. It was, comparatively, extremely quiet.

Closer inspection revealed it to be a totally different motor.
Previous models used the MY1080Z motor.
This model used the XYD-16 motor. Top speed, with the XYD-16, is approximately 10% slower, than the previous MY1080Z model.
21mph, motor only, cruising speed vs 23mph. (25.9v Li-ion w/16T modded)
by neptronix » Sat Aug 13, 2011 7:59 pm

The helical gears are what's reducing the noise, half of the noise that the older eZips produces is gear noise alone.
Helical gears are less efficient. That could be where you are losing your power
So yes helical is quiet but that comes to a bit hit in power and efficiency that is definitely noticeable.

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circuit
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Re: Steel-geared hub motor?

Post by circuit » Jun 01, 2014 9:41 am

Please stop this offtopic and bs. Not place nor time.
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crossbreak
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Re: Steel-geared hub motor?

Post by crossbreak » Jun 01, 2014 3:22 pm

after the success with delta conversion on this motor [ BIG BLOCK GNG alternative Motor ] https://endless-sphere.com/forums/viewto ... 25#p899408
The BigBlock pulls exactly the some no load Power in Delta as in WYE for the same rpm. The Bafang BPM2 did pull ~7% more in Delta which was no good sign so I switched back to WYE.


i'm willing to try it with this one now... let's see if this works in Delta as good as in WYE

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Re: Steel-geared hub motor?

Post by crossbreak » Jun 02, 2014 2:50 pm

bad news. i just climbed the local hill, before i wanted to start the Delta conversion this evening. The hill is 10-15% and ~3.5 km distance from bottom to the top. i run it 25A with the KU93 controller with 12s lipo 44.4V niminal, it still had 46V no load when the motor died. it died only 50m in front of the top :oops:

checked on motor temp in the middle of the hill...was still ok. could touch it. On top of the hill when it burned i could not touch it. Smelled only slightly

i'll have a look inside tomorrow, but i guess that at least one phase has burned

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circuit
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Re: Steel-geared hub motor?

Post by circuit » Jun 02, 2014 3:09 pm

:( damn...

Received bafang BPM motor today. Wow, have not seen so good quality chinese hub motor yet. Can't compare to this one.
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crossbreak
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Re: Steel-geared hub motor?

Post by crossbreak » Jun 02, 2014 3:21 pm

BPM is great.. best one I now. But then have a look at the CST... it even comes with temp probe wire (white one, not connected in stock) and 0.3mm lams

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Re: Steel-geared hub motor?

Post by crossbreak » Jun 15, 2015 11:28 am

i got a new one about a month later last year. It worked fine till February 2015 (sensorless, 13s 48V, 15A), then the axle twisted. I did not notice my torque arm was cracked. Replaced the axle, after 200m it broke again, since my TA was broken :oops: Bought a MAC motor the next day

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Re: Steel-geared hub motor?

Post by circuit » Jun 15, 2015 4:31 pm

I have rewound mine to 2x speed (~50km/h at 36V 24") and did not use it much... PM if anyone interested.
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Re: Steel-geared hub motor?

Post by usertogo » Nov 13, 2017 6:56 pm

wil wrote:I'm interested in these too, I'm hoping to build a 2wd drive bike, pushing about 2400 watt, so 1200 per motor, aiming for 70kmh top speed(not for long though~~ ) (https://endless-sphere.com/forums/viewto ... 28#p877728)
Me to, I don't want to use so much power on my little geared hub motor anymore, after I once burned one (without cooling oil) after a few km climb at 1500W. The precise motor is sold in Germany as a 250W 'Trio' - is that a Bafang?
I am running it limited to ~950W now and have a fine oil in it that I need to replenish frequently because it is not completely leak proof yet (and probably will never be considering it will produce pressure when heating up!)
For the front I just bought a 1500W 12" direct drive hub wheel, because I think regenerative braking is a must for long distance racing! I am interested to put metal gears in mine too, but how can I verify if a 250W 'Trio' is really a Bafang?
More info on my project here:
https://endless-sphere.com/forums/viewt ... =6&t=74437
IMG_20170927_182130viaKAwebES.jpg
Recumbent Fat Bike 2017

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Re: Steel-geared hub motor?

Post by usertogo » Nov 27, 2017 11:03 am

usertogo wrote:
Nov 13, 2017 6:56 pm
how can I verify if a 250W 'Trio' is really a Bafang?
I opened it up and it says 8Fun HD
The reason for opening it was that I thought I had stripped my gears, as I noticed liberal slipping with very limited traction! Surprise when I opened it the gears are like new!
Why might it be slipping?
IMG_20171125_172704Trio-web.jpg
36teeth planetary gear
(166.19 KiB) Not downloaded yet
IMG_20171125_172621Trio-web.jpg
8FUN housing inside

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