MXUS 3000 Hub Motor - V1 V2 V3

[teslanv]

i think with 50A you have limited top speed. would be interested to see what speed you get without running into this limit.

Probably. I'm getting up to 50 MPH with this set-up. And honestly, that is fast enough for me.
More can be had, I am sure. I am looking forward to evolutiongts' results with a Sabvoton sine wave controller.

 

[arkmundi]

http://endless-sphere.com/forums/viewtopic.php?f=2&t=63142&start=1025#p1013682 ...

Getting the Programming dialed in on the 3T & Lyen 18X4110 controller. Acceleration and control are quite pleasant, now...

Thanks for the post of your parameter set... will be useful

 

[Hube-]

I have a Specialized Big Hit (135mm dropout) and MXUS laced in the stock P35D 24" wheel. After installing the wheel, I noticed a bit disturbing wheel offset of 8mm from the center line to the derailleur side. The tire has only a few mm space between the side of the swing arm. How much offset is acceptable? I have a single freewheel.

 

[teslanv]

This offset is normal. On a 26" rim it generally works out better. I have not seen the motor laced in a 24" rim, though. And I do the same with the 17" and 19" moped rims I sell.
135mm drop-outs are pretty tight for this motor, too. The detail drawings for the motor call for a 142mm drop-outs width.

 

[mauimart]

I have a Specialized Big Hit (135mm dropout) and MXUS laced in the stock P35D 24" wheel. After installing the wheel, I noticed a bit disturbing wheel offset of 8mm from the center line to the derailleur side. The tire has only a few mm space between the side of the swing arm. How much offset is acceptable? I have a single freewheel.

I too am installing the MXUS into a Big Hit with 24" wheel. I am not using the stock rim but an Alienation Blacksheep 24" rim. It's laced such that the rim is directly centered on the hub (no offset) and this also puts the tire very close to dead center within the swing arm. The dropout width allowed for the motor to easily drop in with maybe an additional 1mm of spreading.

 

[Samd]

People do tend to worry a bit too much about the width of these.

But you could swap the rear disc rotor to 203mm and I reckon you will find the caliper will clear the MXUS' shoulder, so you won't need any extra spacer, 135mm results.

 

[Allex]

Mxus V2 4t@13kW 160A DC/400A phase
Stock phase wires!

[youtube]THdZZbQUTLY[/youtube]

 

[teslanv]

Mxus V2 4t@12kW 160A DC/400A phase
Stock phase wires!

[youtube]THdZZbQUTLY[/youtube]

Video is private

 

[Allex]

Fiixed

 

[teslanv]

Top speed run?

 

[Allex]

Haha, you read my mind,
Here is a speedrun.
First is with OVS 0, second run is OVS at 7
20S14p LG DBHEII batteries
Same controller settings, same Phase stock wires, 160A/400A so around 13kW. Basically Maximum settings that I can dial in on a Locked max-e
Sorry, just did a fast cut, no fancy stuff here, on top of that youtube does a hard compression so you dont see small figures on the display during a ride.
Oh and, it actually wheelies a bit as seen in the video, I had to apply throttle gradually to keep it down.
24" wheels btw.

[youtube]XybF15eNKtI[/youtube]

 

[Doctorbass]

Haha, you read my mind,
Here is a speedrun.
First is with OVS 0, second run is OVS at 7
20S14p LG DBHEII batteries
Same controller settings, same Phase stock wires, 160A/400A so around 13kW. Basically Maximum settings that I can dial in on a Locked max-e
Sorry, just did a fast cut, no fancy stuff here, on top of that youtube does a hard compression so you dont see small figures on the display during a ride.
Oh and, it actually wheelies a bit as seen in the video, I had to apply throttle gradually to keep it down.
24" wheels btw.

[youtube]XybF15eNKtI[/youtube]

13.2kW on a MXUS 3000 3T or 4T with stock phase wires! you are crazy Allezx! but i like that !!

Acceleration look to be better than with the 5403 tests you did.

Look like the normal max speed with that motor and 20s is before power slope drop is at around 60kmh and max at 70km/h... Bot the OVS give you 32 more km/h! that's about 45% faster with the OVS.


So with 20s and a MAX-E you can get crazy acceleration and still be able to top to 102km/h! without any worrie to blow the controller

That Motor-Controller match look like awsome!

Doc

 

[Brake]

Damn! Didn't know the display only went to 99!!![SMILING FACE WITH OPEN MOUTH] [SMILING FACE WITH OPEN MOUTH]

Just wondering if that was rc7?

 

[Allex]

Those phase wires are heating up pretty quickly. I dont think they will hold during hot summer days, haha.
Yes, the 4t mxus has more torque at start compared to 5403, much easier to do power wheelies with it at start up. The torque then starts to disappear at around 50km/h. While 5403, has just begun its spin-up and just keeps going faster with about the same torque.
And yes I only accept rc7b all the above firmwares feels like a slow-motion in comparison =)

 

[macribs]

Those phase wires are heating up pretty quickly. I dont think they will hold during hot summer days, haha.
Yes, the 4t mxus has more torque at start compared to 5403, much easier to do power wheelies with it at start up. The torque then starts to disappear at around 50km/h. While 5403, has just begun its spin-up and just keeps going faster with about the same torque.
And yes I only accept rc7b all the above firmwares feels like a slow-motion in comparison =)

Would you consider swapping the mxus 3000 for a few more ponies from a cromtor? Or consider this, would you do the swap for about 4 more kw of power and an added 4 kilo's of added unsprung mass? Or do you think the mxus is at a sweetspot in terms of performance and weight ratio?

Will you do mods to the mxus 3K, like changing phase wires and do something for extra cooling. Seems that you are pushing hard enough so that mod's might be in place.

 

[Allex]

This video is only for a show. You would not want to run those power levels during normal operations, this is because overheating is just a few minutes away.
Both Cro and Mxus are not capable of doing those power levels during a long sustainable time. They are what they are, hub motors and not mid drives. So you have to keep the power down with those big wheels.
If I had to pick, I would choose mxus for doing offroading/jumps and cromotor for street riding(if I would want all the power). There is no perfect hub motor so you have to choose one after your riding conditions.

The mods I would do is swapping out the phase wires, and try with oil cooling I am very curious on what that might do. And order custom covers from factory, similar to these, but with real cooling fins to maximize the cooling area, instead of this star shaped design thing.

 

[madin88]

The mods I would do is swapping out the phase wires, and try with oil cooling I am very curious on what that might do. And order custom covers from factory, similar to these, but with real cooling fins to maximize the cooling area, instead of this star shaped design thing.

nice find Allex! does MXUS offer these covers or from where can we get them?
I want them

btw:
i'm working on a custom axle for these motors and will offer it soon here as a set incl. sidecover with larger bearing flange and bearings as request.
its made of strong 42CrMo4 steel, M16 flat to flat, 150mm dropout width. enough space for 8mm² phase wires and separate wire for halls.

 

[striker54]

nice find Allex! does MXUS offer these covers or from where can we get them?
I want them

http://e4bike.ru/

 

[teslanv]

OK. For all those curious to know how these MXUS motors truly stack up to the competition, I delivered four of the 3000W V2 motors to Justin at Grin Tech on Saturday.

Justin said he hopes to get these motors dyno tested within the next couple of weeks.

He has one of each of the four winding options to test.

3T (~12 Kv)
4T (~9Kv)
5T (~7.2Kv)
6T (~6Kv)

I may also send Justin a 4T of the V1 Stator so he can model the difference in stator design. (Lamination thickness and thermal mass of the stator)

Exciting times.

 

[Doctorbass]

OK. For all those curious to know how these MXUS motors truly stack up to the competition, I delivered four of the 3000W V2 motors to Justin at Grin Tech on Saturday.

Justin said he hopes to get these motors dyno tested within the next couple of weeks.

He has one of each of the four winding options to test.

3T (~12 Kv)
4T (~9Kv)
5T (~7.2Kv)
6T (~6Kv)

I may also send Justin a 4T of the V1 Stator so he can model the difference in stator design. (Lamination thickness and thermal mass of the stator)

Exciting times.

This is awsome!

I'm impatient to get the results.

Would be also great if he could finally test one of these Cromotor... so we could see the diff wityh larger stator and other light differences..

Doc

 

[madin88]

excellent news teslanv
yes, a cro needs to be shipped to justin as well..

 

[macribs]

Maybe Zombiess can help out with cromotor to dyno if has motors in stock?
It would be totally awesome to finally see cromotor and mxus 3K neck to neck. And that dyno would make it much easier for people to do calculations in the great simulator and also to make the right decisions before purchase.

If zombiess can't contribute maybe we can start a collect to get together the money needed for a cromtor shipped to testing?

 

[Doctorbass]

Maybe Zombiess can help out with cromotor to dyno if has motors in stock?
It would be totally awesome to finally see cromotor and mxus 3K neck to neck. And that dyno would make it much easier for people to do calculations in the great simulator and also to make the right decisions before purchase.

If zombiess can't contribute maybe we can start a collect to get together the money needed for a cromtor shipped to testing?

If it would be a recent version V3 or V4 I would be welling to buy one and get it shipped to Justin before to get it shipped to me.

Doc

 

[teslanv]

If it would be a recent version V3 or V4 I would be welling to buy one and get it shipped to Justin before to get it shipped to me.

Doc

per the ebikes.ca page:

Doing a full characterization of a hub motor takes a lot of our time and also requires destructive testing to understand the thermal limits. To add a new motor we require a) that it is readily available as a motor only and without an integrated controller (so no BionX), and b) that we are given for keeping two samples of said motor, one for destructive test and the other to keep on hand as reference should we ever need to repeat tests, and c) that it is sufficiently popular amongst DIY ebike conversions to be of value to have listed.

However, Justin Noted to me that he no longer requires destructive tests to determine the thermal limits of a motor, and that, for a series of motors, such as the MXUS, he would only need to keep one or two versions on hand for re-testing as needed.

I think the problem is that no one wants to "donate" a Cromotor...

With a little bit of financial help from a few forum members, I donated the MXUS motors so that their performance could be documented by an independent engineer.

 

[Allex]

So donate a QS motor, 260bucks of worth, will be cheaper than a cro =)