Bafang Ultra Discussion

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
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agedashidofu   1 W

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Bafang Ultra Discussion

Post by agedashidofu » Apr 21 2018 8:47am

Folks,

Opening up a dedicated thread for Bafang Ultra - since we don't have any yet.

Thought this would be good for folks to share / discuss any builds using the Bafang Ultra

Let me start:

Planning to get the Bafang Ultra, set up w/ Grin Phaserunner & Cycle Analyst.

1. Anyone knows if there are any foreseen issues w/ this setup?
2. Will Bafang Ultra's built-in torque sensor work w/ Cycle Analyst?
3. How much amp can the motor handle? I plan to run this w/ 60V (nominal) pack & 50A max amp

Thx!!!

tommie   10 W

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Re: Bafang Ultra Discussion

Post by tommie » Apr 21 2018 7:25pm

couple of things - where do we find frames capable of taking the Ultra motor?

and is the Ultra motor both cadence and torque or just torque only?

agedashidofu   1 W

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Re: Bafang Ultra Discussion

Post by agedashidofu » Apr 21 2018 9:43pm

Just torque, not cadence
As for the frame - I think this is relatively new, so it may take time before we see more getting released to the market. As for the frame, there are a few that offers today, but require a minimum order quantity of 50 :-(

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amberwolf   100 GW

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Re: Bafang Ultra Discussion

Post by amberwolf » Apr 22 2018 12:38am

agedashidofu wrote:
Apr 21 2018 8:47am


Opening up a dedicated thread for Bafang Ultra - since we don't have any yet.
Theres a few about it
https://endless-sphere.com/forums/searc ... mit=Search

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Daxxie   1 W

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Re: Bafang Ultra Discussion

Post by Daxxie » Apr 28 2018 3:18am

tommie wrote:
Apr 21 2018 7:25pm
couple of things - where do we find frames capable of taking the Ultra motor?
I ordered a titanium Fatbike frame for the Ultra in China.
It's almost ready to ship. Will keep you posted.

Image

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Daxxie   1 W

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Re: Bafang Ultra Discussion

Post by Daxxie » Apr 28 2018 3:29am

agedashidofu wrote:
Apr 21 2018 8:47am
Planning to get the Bafang Ultra, set up w/ Grin Phaserunner & Cycle Analyst.
1. Anyone knows if there are any foreseen issues w/ this setup?
2. Will Bafang Ultra's built-in torque sensor work w/ Cycle Analyst?
3. How much amp can the motor handle? I plan to run this w/ 60V (nominal) pack & 50A max amp

Would love to know that as well.

I have a brand new Ultra here that blew the controller after connecting the battery.
Don't know what to do with it.
Controllers don't seem available.

A Phaserunner could fit inside the casing. There is quite some room.
But only interesting when the Torque sensing function works.

Currently Luna isn't offering the 50A Ludicrous version anymore because of reliability issues.
Don't know if these issues are electrical or mechanical.

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Hillhater   100 GW

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Re: Bafang Ultra Discussion

Post by Hillhater » Apr 28 2018 3:44am

Daxxie wrote:
Apr 28 2018 3:18am
I ordered a titanium Fatbike frame for the Ultra in China.
Image
Who designed that frame ?
Im not a fan of using the "open" motor support as a key structural frame component in that design.
This forum owes its existence to Justin of ebikes.ca

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Daxxie   1 W

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Re: Bafang Ultra Discussion

Post by Daxxie » Apr 28 2018 4:20am

Hillhater wrote:
Apr 28 2018 3:44am
Daxxie wrote:
Apr 28 2018 3:18am
I ordered a titanium Fatbike frame for the Ultra in China.
Image
Who designed that frame ?
Im not a fan of using the "open" motor support as a key structural frame component in that design.
Well, we will see.
I'm hoping all being titanium it won't fall apart. :-)

How else could it be done?

agedashidofu   1 W

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Re: Bafang Ultra Discussion

Post by agedashidofu » May 05 2018 6:17pm

Anyone knows if bafang ultra and bafang max have the same mount? Found a nice carbon frame but it says for bafang max, so not sure if the mounts arr the same

Thanks

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Ivanovitch_k   10 W

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Re: Bafang Ultra Discussion

Post by Ivanovitch_k » May 06 2018 3:09pm

max & ultra mounts are not the same at all.

see Luna's Ultra motor product page, they show the differences.
BBS'ed Radon ZR Team 8:
BBS02B 750W - DPC750C - 48V 17.5Ah GA shark - 11 spd 11-40 Shimano XT, 42T N-W Precialps CW, KMC X11e chain, Gearsensor, XT RD, XTR Shifter, F Saint Brake, R XT Brake, RT99 200/160 Discs, magnetic shutoff, DT Swiss X1900 QR9 wheels, Manitou M30 air fork, 2.4" slick balloon schwalbe Super Moto X tires @2 bars, Suntour NCX suspension seatpost, ergon SFC3 saddle, ergon GP3 grips, Supernova M99 Pro + E12 Taillight

Kitaro1999   100 mW

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Re: Bafang Ultra Discussion

Post by Kitaro1999 » May 06 2018 8:20pm


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Ivanovitch_k   10 W

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Re: Bafang Ultra Discussion

Post by Ivanovitch_k » May 27 2018 6:46am

Does someone knows the purpose & pinouts of the ultra's connectors ? Also, their make/model would be useful

edit: found them, they are JST's JWPF series and are surprisingly IPX7 rated (i.e. no ingress for at least 30min under 1 meter of water) !

here is what I know so far, all viewed from motor-side.
  • 8-pin white female: main EB-bus -> throttle, ebrakes, display uart & power (programming cable attach here)
  • 2-pin blue male & female: lights connectors, 6 Vdc out, 3W max / 500mA (for both or per cable, unknown)
  • 3-pin white female: speed sensor
  • 3-pin white male: gear sensor ? to be confirmed
  • 4-pin black female: ?
What I suppose the black one does is connection to compatible BMS over UART or CAN. The motor would forward the BMS data to the display in order to populate the detailed battery info page (on dpc18 at least) :?:
BBS'ed Radon ZR Team 8:
BBS02B 750W - DPC750C - 48V 17.5Ah GA shark - 11 spd 11-40 Shimano XT, 42T N-W Precialps CW, KMC X11e chain, Gearsensor, XT RD, XTR Shifter, F Saint Brake, R XT Brake, RT99 200/160 Discs, magnetic shutoff, DT Swiss X1900 QR9 wheels, Manitou M30 air fork, 2.4" slick balloon schwalbe Super Moto X tires @2 bars, Suntour NCX suspension seatpost, ergon SFC3 saddle, ergon GP3 grips, Supernova M99 Pro + E12 Taillight

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