MXUS 3K Turbo (V3) 45mm Direct Drive Hub Motor

[ebike11]

Hi guys
Just got the 3000w turbo
It didnt come with a freewheel sprocket. Id like to get a single speed that can be removed with a tool to compare different freewheels with different tooth counts.
Id like to stay away from the chinese ones that i see all over the place. Perhaps a Shimano. But i dont know the thread etc. specs. of the motor. What are you guys using?
Thx in advance

For a single speed, you'll want to decide which is more important: Easy Pedaling when you run out of power, or being able to pedal along with the motor at higher speeds.

For Easy Pedaling, I like the ACS Crossfire Freewheels, in a 18T or bigger.

ACS 18T.jpg

For High Speed pedaling, a 12T Freewheel is handy.

12T.b.jpg

Thx for the info..but id like to get a freewheel with notches so that i can use a removal tool to get them off easily. I seen that its a headache to get those freewheels that have those 2 dimples because you gotta baskcally destroy it, using a punch then removing the guts.
What about shimano? I read that they are quieter as well

Also guys,,what torque arms are you using with your 3k motor?

[teslanv]

Thx for the info..but id like to get a freewheel with notches so that i can use a removal tool to get them off easily. I seen that its a headache to get those freewheels that have those 2 dimples because you gotta baskcally destroy it, using a punch then removing the guts.

The ACS freewheels have 4 notches and can be removed cleanly with a removal tool.

[ebike11]

Thx for the info..but id like to get a freewheel with notches so that i can use a removal tool to get them off easily. I seen that its a headache to get those freewheels that have those 2 dimples because you gotta baskcally destroy it, using a punch then removing the guts.

The ACS freewheels have 4 notches and can be removed cleanly with a removal tool.

In the photo on the last page i dont see the notches...are they on the other side? If so..shouldnt the notches facing outwards?

[teslanv]

Six notches actually. You can see them in the photo on the inside circle.

[ebike11]

Ok.
But i dont see many options for torque arms....what are u guys using?

[ebike11]

Whats the maximum amount of Amps roughly that you can you safely give this motor?
My controller is set at 50A at the moment

[markz]

Whats the maximum amount of Amps roughly that you can you safely give this motor?
My controller is set at 50A at the moment

Depends on the turn count, the lower the turn count the more amps it can take because of the larger shorter wire. Higher turn motors have longer smaller wire, shall I say windings. Teslanv did post up what each turn could approximately take. Not feeling so generous at the moment to find it for you, but I will help you out as I am a great guy. Its in the main MXUS thread. Gotta go to bed. Chow.

[ebike11]

Whats the maximum amount of Amps roughly that you can you safely give this motor?
My controller is set at 50A at the moment

Depends on the turn count, the lower the turn count the more amps it can take because of the larger shorter wire. Higher turn motors have longer smaller wire, shall I say windings. Teslanv did post up what each turn could approximately take. Not feeling so generous at the moment to find it for you, but I will help you out as I am a great guy. Its in the main MXUS thread. Gotta go to bed. Chow.

Yes youre a great guy hahah thx for the tip
But isnt this the main MXUS thread?
Also i got the 3T

[markz]

This thread is buddy selling his, what I am saying is there is a 100+ page thread on the MXUS 3kw, and I think he put the amps and for how long on page one. I have the 4T its a V2 and I like it, dunno the KV off the top of my head think its like 10ish.

viewtopic.php?f=2&t=63142&p=1159655&hil ... w#p1159655

MXUS XF40-45H "3000W" Direct Drive Hub Motor Series:

3T:
Max. Continuous Phase Current: 55A
Overheat in 10 Minutes: 85A
Overheat in 60 seconds: 242A

4T:
Max. Continuous Phase Current: 42.6A
Overheat in 10 minutes: 66A
Overheat in 60 seconds: 186A

5T:
Max. Continuous Phase Current: 34.9A
Overheat in 10 minutes: 51.6A
Overheat in 60 seconds: 150A

6T:
Max. Continuous Phase Current: 30.3A
Overheat in 10 minutes: 47A
Overheat in 60 seconds: 132A

Generic Winding Phase Current Limits per strand:
Max. Continuous Phase Current: 2.84A per strand
Overheat in 10 minutes: 4.4A per strand
Overheat in 60 seconds: 12.4A per strand

*All data assumes a non-vented hub motor. Venting or other methods of cooling should increase these values.

MXUS XF40-45H (3000W) DD Hub motors...

21X3T Winding
Phase resistance = 0.072 Ohms
RPM at 50.2V = 597, 11.89 Kv
1.78A/89.4 Watts No Load

16X4T Winding
Phase resistance = 0.110 Ohms
RPM at 50.2V = 448.2, 8.93 Kv
1.08A/54.2 Watts No Load

12X5T Winding
Phase resistance = 0.163 Ohms
RPM at 50.2V = 359, 7.15 Kv
0.84A/42.2 Watts No Load

10X6T Winding
Phase resistance = 0.225 Ohms
RPM at 50.2V = 299.4, 5.96 Kv
0.64A/32.1 Watts No Load

All bare hub motors weigh in at right around 9.14 Kg.

[ebike11]

Anyone know where to get torque arms for this motor? And at a reasonable price?

[spinningmagnets]

The appropriate shape for a torque-arm is very dependent on the shape of the drop-outs on the bike you want to install a kit on. I have had very good luck using "big blue saw" as a water-jetting service. their proprietary CAD drawing program is very easy and intuitive to use, and once you are done, you ask for a quote before you would have to pay anything, with no obligations...

"torque arm picture thread"
https://endless-sphere.com/forums/viewto ... =2&t=26444

[teslanv]

Anyone know where to get torque arms for this motor? And at a reasonable price?

Post a picture of your bike's drop-out, and maybe we can make some recommendations.

[ebike11]

Ok ill get a pic asap.
Also im using 72V battery pack and 72v 18fet controller...phase degree 120, 50A but rated at 2000w. I experience very slight sputtering at full throttle at times but not always. Would it be because the controller is rated at a lower wattage than the motor? Thx

[markz]

Its super easy to go to a metal store, like https://www.metalsupermarkets.com/ and buy some flat stock that they can cut for you to a general dimension. You'd have to cut your own slot, with a grinder and thick cut-off wheel. Then your next concern is mounting the torque arm, which could be as simple as buying some U-bolts, or making it neat and clean with some bolts, buy a tap and dye set from Harbor Freight USA or Princess Auto Canada, Canadian Tire has cheap sales sometimes, if you in Canada.

[ebike11]

Its super easy to go to a metal store, like https://www.metalsupermarkets.com/ and buy some flat stock that they can cut for you to a general dimension. You'd have to cut your own slot, with a grinder and thick cut-off wheel. Then your next concern is mounting the torque arm, which could be as simple as buying some U-bolts, or making it neat and clean with some bolts, buy a tap and dye set from Harbor Freight USA or Princess Auto Canada, Canadian Tire has cheap sales sometimes, if you in Canada.

Yes but im in korea and there dont seem to be any places like that around here.
The mxus seems to be a popular motor..strange why there isnt a generic torque arm for it
I only see generic torque arms for M14 axles

[markz]

Oh Korea, I see. You can still do it, I bet.

www.ebikes.ca has torque arms

[ebike11]

Oh Korea, I see. You can still do it, I bet.

www.ebikes.ca has torque arms

Ok ill check ebikes.ca
Its strange that for a popular motor there arent any standard torque arms?

[teslanv]

I sell M16 x10mm universal torque arms.
https://www.westcoastelectrics.com/prod ... m16-axles/

[amberwolf]

This thread is buddy selling his, what I am saying is there is a 100+ page thread on the MXUS 3kw, viewtopic.php?f=2&t=63142&p=1159655&hil ... w#p1159655

Unfortunately only the first 8 posts of that thread, of the first page, is actually visible, because something is broken in the database pointer for it (guessing). The other posts are still there, because you can see them when searching on the title of the thread, but you can't see or read them any other place than in the search page. They won't display in the actual thread.

[Electrik]

Hello,

Can someone tell me what the dropout-width will become of the standard 142mm V3 combined with a single gear freewheel?
I would like to place it like that in a +/- 140mm swingarm.
Thanks in advance.

[amberwolf]

If it's 142mm from shoulder to shoulder on the axle, then that's what it's going to be.

[Electrik]

Thanks! Gr. Elect-Rik

[ebike11]

Hi guys..im also running a 3k turbo motor with my Cycle Analyst V3.
I am using the magnet on the spoke and pickup sensor/cable from the CA3 for the speedometer.
What is the # of poles are you guys setting your CA to? Stock firmware has it set at 23 poles but the speedometer doesnt work...stuck at 0.
Thanks

[teslanv]

Hi guys..im also running a 3k turbo motor with my Cycle Analyst V3.
I am using the magnet on the spoke and pickup sensor/cable from the CA3 for the speedometer.
What is the # of poles are you guys setting your CA to? Stock firmware has it set at 23 poles but the speedometer doesnt work...stuck at 0.
Thanks

If you are using the "DPS" version cycle analyst with the speed sensor, your poles should be set to "1" (i.e. 1 magnet signal per RPM)

[Cowardlyduck]

Not sure if anyone saw my post above....where does one buy one of these motor's these days?

The email address on the MXUS website bounces, most of the Alibaba/Aliexpress listings are dubious at best, and all the other alternatives are quite pricey.

Anyone?

Cheers