Samd
10 MW
I suspect more people read this forum in China than we give credit...
MXUS 3000 Hub Motor - V1 V2 V3
- Thread starter Allex
- Start date
ridethelightning
1 MW
- Joined
- Jul 21, 2013
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- 2,010
https://m.facebook.com/story.php?story_fbid=569647379806222&id=166107346826896&fs=5
ok so heres the REAL mini cro, guys. just incase anyone wants to find one...
ok so heres the REAL mini cro, guys. just incase anyone wants to find one...
Ebikebert
100 W
Hey guys, does anyone know the spoke count for this motor? as well how thick they can be, 12 gauge? What is the diameter of this motor. I am trying to use this calculator to see what spokes I need for a 17 inch rim. Any help would be much appreciated. Thanks!
http://www.ebikes.ca/tools/spoke-calc.html
http://www.ebikes.ca/tools/spoke-calc.html
teslanv
1 MW
Samd
10 MW
The real minicro sure is interesting, and I've been getting in quite a lather over it.
But with the mammoth 273mm radius and narrower stator, I'm not sure now that it's going to be an order of magnitude better.
From memory, torque is linear to magnet width, and proportional to the square of the radius from memory. It should have a lot of pull with that radius, but making it remotely discrete is going to be like hiding a corpse under the front doormat
It is about a kilo lighter though...
I'm thinking I will keep pushing on with the Mxus. A bargain for the money.
But with the mammoth 273mm radius and narrower stator, I'm not sure now that it's going to be an order of magnitude better.
From memory, torque is linear to magnet width, and proportional to the square of the radius from memory. It should have a lot of pull with that radius, but making it remotely discrete is going to be like hiding a corpse under the front doormat
It is about a kilo lighter though...
I'm thinking I will keep pushing on with the Mxus. A bargain for the money.
Ebikebert
100 W
Speaking of comparing motors do we have a solid kv rating for the four turn version of the mxus motor? Thanks again.
teslanv
1 MW
Willow said:
I noticed the error also. The Cables do indeed come out of the axle near the bearing.
stepan
100 mW
Yes, v2 prototype received. But the winter came in October in Moscow this year. It is rather cold driving 70-75kmh for a long time now so we can't make such test. So the hill test is all we managed to do. I hope it will be a bit warmer this week.
I noticed a much better cooling. That is what we wanted with Al stator.
I noticed a much better cooling. That is what we wanted with Al stator.
sacko
10 kW
That looks nice, shame it isn't the one most of us have bought on the groupbuy.
Hopefully it will be available in the next 6 months.
Hopefully it will be available in the next 6 months.
stepan
100 mW
Have you changed the amount of copper inside? I can't find now but I've seen somewhere it is now 16x4t, not 15x4t. Is this correct?e4bike.ru said:
stepan
100 mW
@e4bike.ru
The problem I see on the axle is that it's flat part which going through the cover bearings has very small diameter = 16mm. This makes 2 problems:
1. only 1mm edge around the axle. So you have to put 3mm thick or larger steel washer between this edge and the dropout. Otherwise aluminum frame or smaller washer would not withstand. This adds to minimum dropout width at least 6mm, so 135mm+6mm=141mm...
2. hole for the cables is too small for bigger phase wires for the same reason, they can't drill large hole in small diameter axle
If you only could make the flat axle diameter 20mm or more it would solve those 2 problems easily. How you think of this change?
The problem I see on the axle is that it's flat part which going through the cover bearings has very small diameter = 16mm. This makes 2 problems:
1. only 1mm edge around the axle. So you have to put 3mm thick or larger steel washer between this edge and the dropout. Otherwise aluminum frame or smaller washer would not withstand. This adds to minimum dropout width at least 6mm, so 135mm+6mm=141mm...
2. hole for the cables is too small for bigger phase wires for the same reason, they can't drill large hole in small diameter axle
If you only could make the flat axle diameter 20mm or more it would solve those 2 problems easily. How you think of this change?
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MAGICPIE3FOCUSPOWER
10 kW
stepan said:
More prictures?
Thanks 8)
stepan
100 mW
e4bike.ru said:
It's not even a problem of usage of torque arms. Axle would be pulled throught dropouts by tightening wheel nuts, and 1mm edge for the aluminum is nothing to be stripped by sharp steel edge.
If you put torque arms between motor axle and dropout - then yes, I agree, because it would be used as both huge washer and torque arm itself. But then you need 150mm dropouts...
Even if 2.5mm2 phase wires are not melting instantly out of 180 Amps it gives you a voltage drop of around 7-10% and compareable heat losses... Which brings down effectiveness of the motor significantly, not even talking about reliability...
MAGICPIE3FOCUSPOWER
10 kW
e4bike.ru said:
Outside is the same as v1. What else would you like to see?
Every angle of the motor and covers I would like see hahaha :lol:
Thanks
I agree this would fix 2 of the biggest problems for hot rodders,# 1 axle breakage/ twisting and # 2 phase wires melting... having a big enough channel to upgrade to 10 awg phase wires would be a dream come true, what is the axle steel grade.stepan said:
stepan
100 mW
That would be great!e4bike.ru said:
For example, hallomotor and conhismotor have 1500W motor with 20mm diameter axle
BTW, this motor has 35mm magnets and suits into 135mm dropouts, also 2.5mm2 phase wires. Too bad it has very high kv and overheat pretty easily inside my 26inch wheel.
Attached some of my pictures of the hallomotor insides
Attachments
e4bike.ru said:
If you really think of an axle and cover mod, do it perfect and make a second outlet for water cooling tubes.
maybe it is possible to still install a brake rotor with the second outlet.
What about M18 on the chain side for torque transfer and M14 on the wire (and water cooling tubes) side?
Allex
100 MW
So cromotor mini 10kg and big brother is 11kg.
Almost no difference. :9 Might as well get the big one =)
Almost no difference. :9 Might as well get the big one =)
Allex said:
the 10kg was with strong rim and big spokes.
the difference to V1 was stated to be +300g, so the motor only should weight about 8,3kg.
thats would be 3kg less than cromotor which is not bad..
@ e4bike.ru
what is the max RPM of this V2 motor before eddy losses become to big?
e4bike.ru said:
yes it should be similar to original cromotor.
as far as i know its mainly about comparing no-load power consumption at different voltages (only motor without wheel). if its low and linear to volts (im not dead sure if linear?), its ok. if it starts to get bigger and bigger than usual, its bad. that voltage point or RPM would be interesting.
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