MXUS 3000 Hub Motor - V1 V2 V3

[windtrader]

Well never forget any sort of bicycle rating would be for human pedalled speeds like 20mph. Using simple science - kinetic energy = mass multiplied by the square of the speed, surviving a pothole 20mph might cause catastrophic failure at 40 - 50- mph. Really? It only takes one missed pothole at 50+ and one may wish they never got on that ebike.

 

[Allex]

Got a few mxus3k v2, some picures.

Pretty good package, 24" rim. and a 12T freewheel included to the order. 12T,14T, 16T are available. I maked a special order and costs extra, they are not included by default.
Feel like a damn Toy with its 10Kg(rim, freewheel) compared to my Crystalyte 5403(15Kg!)
View attachment 11



Custom engraving. "3k4Turn250W" 1412(could be 2014 December) 0002 motor number with this engraving/customer.


Pretty wide rim at 42mm

View attachment 8


3mm Spokes, same as on my Stealth


2,5mm phase wires.


Temp sensor


Small magnet gap


A bit sloppy, look at 3 and 9 o clock. Copper is 0,5mm on both 5T and 4T


Ok time to test this on my Bomber and see how it is.

 

[Stevil_Knevil]

So, more copper fill on the higher wind motor ..nice! Did you spec that, or is this standard winding practice on the 3kW MXUS V2?

Aside from a few stray/loose windings at 3 and 9 o'clock, this looks like one of the best 'Straight Outta' China' wheel builds I have ever seen. Were you pleased with the spoke tension and overall wheel trueness?

 

[Allex]

Tentions is very firm and even. I have yet to see how true it really is.
Regarding windings I did not specify, So probably standard.

 

[Rix]

I am excited to hear about you findings. Like you said in the PM, to bad its winter for us. :|

 

[madin88]

So, more copper fill on the higher wind motor ..nice! Did you spec that, or is this standard winding practice on the 3kW MXUS V2?

3Tx21 = 63strands
4Tx16 = 64strands
5Tx12 = 60strands

allex measured the strands to be identical, therefore the 4T has the highest copper fill followed by the 3T which is now proven to be doable (got an email today)! This means flux weakening is not absolutely needed to achieve high speeds with below 90V battery..

 

[chucho]

Got a few mxus3k v2, some picures.

Pretty good package, 24" rim. and a 12T freewheel included to the order.

Love the 12T freewheel
Anyone knows were can i buy one? The smalest y could find was 16T on ebay and bought it

So, more copper fill on the higher wind motor ..nice! Did you spec that, or is this standard winding practice on the 3kW MXUS V2?

3T which is now proven to be doable (got an email today)!

It is a pity we did not know before.. i would had buy my motors with 3T (and Allex custom 250w :lol: ) as i am going to use 20" rim

 

[madin88]

Love the 12T freewheel
Anyone knows were can i buy one? The smalest y could find was 16T on ebay and bought it

you can be happy because it should be included
i think its a smaller thread with 30mm or so. BMX freewheel types should fit.

edit: sorry chucho its 35mm thread, so BMX will not fit.
though its nice to see that it is possible to have 12T on 35mm.

 

[chucho]

Love the 12T freewheel
Anyone knows were can i buy one? The smalest y could find was 16T on ebay and bought it

you can be happy because it should be included
i think its a smaller thread with 30mm or so. BMX freewheel types should fit.

I have not seen them on the photos Vampa sent from the motors... and he did say nothing about it so maybe they only came with the "V2"

Is there any mark, name on it?

Pd: i knew BMX did not work cause they where the only smaller ones i could find

 

[Allex]

Added pictures and info about freewheel to my prevous post.
12T,14T, 16T are available. I maked a special order and costs extra, they are not included by default.

 

[John in CR]

Added pictures and info about freewheel to my prevous post.
12T,14T, 16T are available. I maked a special order and costs extra, they are not included by default.

To give people the ability to determine realistic current limits of each you should measure the phase-to-phase resistance. It's quite simple using 2 multimeters and a steady low current source. I used a 12V battery with a 12V light in line to obtain a steady current of about 1.5A. I then put a multimeter set up for the 10A current limit in series to display actual current, and put the motor in series with that by having the current flow into one phase wire and out of another. Measure the voltage drop across the 2 phase wire ends and note the current reading on the other multimeter. Voltage drop / current = phase to phase resistance...probably something around 0.1 ohms (100mOhms) for the 4 turn V1 and less for the V2.

 

[madin88]

first i thought Allex did talk about turn counts, but i believe he meant the freewheel teeth :lol:

 

[John in CR]

first i thought Allex did talk about turn counts, but i believe he meant the freewheel teeth :lol:

LOL, That makes a lot more sense. I was wondering what the ungodly slow wind motors were for...some offroad wheel chair or something.

We should start pushing all motor vendors to give us no-load current at a couple of voltages or rpms, as well as the phase-to-phase resistance, in addition to the Kv now that we understand the importance of these measures. With those plus the stator diameter and width we can get to almost any performance measure of our motors other than continuous current limits, which varies significantly with conditions and is just guesswork anyway. I have a feeling that especially with the V2 and it's additional copper, the MXUS3000 will be a pleasant surprise in it's motor specs, and hopefully put the Xlyte motors in their proper place at the back of the pack, especially once price is considered. eg The legendary 5304 is grossly overrated and is barely more motor than a 9C 9x7 with the same Kv of 9 and a phase-to-phase resistance of 0.17ohm compared to the 9C's .19ohm. The stator dimensions tell us the 5304 is outclassed by the MXUS, and I'm sure the requested specs will support that view.

 

[Allex]

Haha,
Yeah but 5304 is extremely old. The only crazy person that still uses it is Doc in here
I think that performance/quality of the mxus3k should be compared to the new tc4080 from clyte. From the talks, it looks better on the paper:
"Honeywell sensors to bigger teflon phase wires to NKS bearings"
But we do not know about lamination thickness and other important stuff. And of course, tc4080 will have the clyte prices, so guessing about 600USD? You can get 3pcs of mxus3k for that.

 

[MAGICPIE3FOCUSPOWER]

And stupid spokes design....

 

[madin88]

yes, straight pull spokes are stupid but paired holes are nice. as far as i know the newer Crown motors have J-Bend spoke holes..

btw:
the latest Cromotor only has 3mm wider stator and almost same stator diamter (not dead sure if its exactly same diamter?) which would mean the MXUS3000 V2 only has about 5% less torque or power.
regarding weight the V2/V3 Cro has over 11kg (saw a pic on a scale with 12,2kg) while the MXUS V2 only has 8,9kg
If the Axle is made of good steel this motor will be a winner for sure.

 

[BoomerChomsi]

How does paired holes looks like?

Thank you!

 

[efMX Trials Electric Freeride]

the newest Crown motors now use standard L bend spokes..

http://endless-sphere.com/forums/download/file.php?id=143655
http://endless-sphere.com/forums/viewtopic.php?f=3&t=48089&start=1675#p929426

And stupid spokes design....

 

[MAGICPIE3FOCUSPOWER]

Ahh thanks! So it looks like they have learn their lessons?

L bend spokes are any good...? I don't have any experience with this kind of type spokes.

 

[madin88]

paired spokes are mainly for having better spoke angle on bicylce rim which should result in a more durable wheel (18 holes needs to be custom drilled to the motor flange).
as example MXUS in alex dx32 rim with 1-cross and 12mm hole spacing (i will do so):

 

[amberwolf]

Yeah but 5304 is extremely old. The only crazy person that still uses it is Doc in here

There's also me, and I think NeilP, probably a few others. (I'm still working on a replacement axle design so I can use a front X5304 on the rear). Though I don't think any of my controllers will really do it justice, it's still a bit better than what I already had.

 

[efMX Trials Electric Freeride]

J bend / L bend.. just standard bike spokes ..
(as opposed to the older TC proprietary spoke head bend angle)..
what do you call them??..

Ahh thanks! So it looks like they have learn their lessons?

L bend spokes are any good...? I don't have any experience with this kind of type spokes.

 

[BoomerChomsi]

Ahaaa thank you ! I mean J bend. Never heard of L bend
@Madin88 those are MXUS V2 dimensions for lacing spokes?

Thank you!

 

[\/ampa]

Sadly my Kelly controller have no auto-detect.
Can someone give me the phase + hall color combination for a Kelly controller with the MXUS 3000?

 

[madin88]

@Madin88 those are MXUS V2 dimensions for lacing spokes?

Yes, 231mm flange diameter with 49,5mm spacing. Do not choose "paired hole spacing" because this is not standard.