Nanjing far driver controllers

Electric Motors and Controllers
MMD   1 mW

1 mW
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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 03 2022 5:16pm

Thanks for responding to my post guys I really appreciate! I know the QS138v3 is a 5 pole pair motor but for some reason I can’t get it on 5 after auto learning. It won’t save anything. Thank you for screenshots. My menu seem way different then yours is that on pc? Maybe I should give that a try?

DEHiCKA   100 mW

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Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 04 2022 4:11am

QS preprogrammed this settings for me for the same motor as yours and it run smooth and accelerates pretty fast at no load at least. So you should definitely give it a try.
It is 4 poles in the settings. I do not have a clue why, but that is the way it was set up and it works.
Also battery current limit setting works pretty well even at low values like 10A, so you will not damage anything.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

Stevebequik   100 mW

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Joined: Mar 18 2019 7:35pm

Re: Nanjing far driver controllers

Post by Stevebequik » Jan 04 2022 6:22am

I understand the Qs138 is a 3 phase, 12 slot, 4 coil pairs with 5 magnet pairs motor.
FarDriver is counting coil pairs, not magnet pairs.
4 is correct and is self detected & hence why you can’t change it.

I finally have my crf250 72530 qs138 v3 up and running.
Impressive power output.
Need to do some more testing. Seems to run quite hot compared to the nuc24 it replaced.
But It is summer in norther Oz.

MMD   1 mW

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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 04 2022 6:37am

Can you share your settings? And maybe explain to me how the ratio to speed works. Can I for example start and end with 100% or do I have to keep a end percentage in mind?

DEHiCKA   100 mW

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Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 04 2022 2:12pm

I have found actual RPM reported in android software is incorrect, it is 5/4 higher than actual RPM.
Looks like they messed up coil/magnet pair in calculation.
So to limit RPM to 7000 I have to set maxRPM to 8750.

Also plots in android app are all over the place and completely unrelated to the real time measurements.
P.S. I have figured out it is not a real time plot, but about 1 minute of data recorded at the first activation of motor since power up or reset.
The battery voltage line (black) is centered on the rated voltage setting in the motor params.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

Paulflieg   10 W

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Re: Nanjing far driver controllers

Post by Paulflieg » Jan 05 2022 12:09pm

Stevebequik wrote:
Jan 04 2022 6:22am
I understand the Qs138 is a 3 phase, 12 slot, 4 coil pairs with 5 magnet pairs motor.
FarDriver is counting coil pairs, not magnet pairs.
4 is correct and is self detected & hence why you can’t change it.

I finally have my crf250 72530 qs138 v3 up and running.
Impressive power output.
Need to do some more testing. Seems to run quite hot compared to the nuc24 it replaced.
But It is summer in norther Oz.
I'm currently working on a CRF conversion .... How did you fix the motor. Swing axle especially. A picture will inspire me.

DEHiCKA   100 mW

100 mW
Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 10 2022 6:43am

I've tested 72530 on my trials bike with the QS120 motor.
It works well with the same parameters I posted earlier for the QS138.
At a first glance it looks more effective than my old Kelly, and the throttle response is very fast.

The only problem I cannot figure out is the throttle position only limits the torque, not the max RPM.
As a result, it is much harder to control the bike in slippery conditions.
On my ten y.o. Kelly, both torque and RPM limits are proportional to the throttle position, even in torque mode.
Last edited by DEHiCKA on Jan 10 2022 9:31am, edited 3 times in total.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

MMD   1 mW

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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 10 2022 7:44am

I have the same problem. The first 2mm of the throttle is very aggressive and uncontrollable. The rest is very smooth. Asked several people about this issue but they couldn’t or wouldn’t give me a solution to this problem..

DEHiCKA   100 mW

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Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 10 2022 9:27am

Considering what they replied when I asked for torque curves I will not expect much.
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Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

MMD   1 mW

1 mW
Posts: 17
Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 10 2022 3:14pm

I know how the curves work but that’s not the problem. When twisting the throttle 2mm the rpm keeps rising until it’s reaching a certain point. From there it’s really smooth and easy to controle. But before that it’s impossible specially when using 200/250a draws.. And line and eco should be turned around I guess?

DEHiCKA   100 mW

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Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 11 2022 10:20am

ECO is slightly better, Sport is even worse as expected.
I believe it is the speed loop issue, throttle curve will not solve it.
~2000 no load RPM on 1.5% throttle is insane.

I am in contact with the engineer through aliexpress seller i have bought the controller from.
All the things he suggested so far did not help.
Last edited by DEHiCKA on Jan 11 2022 2:56pm, edited 1 time in total.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

MMD   1 mW

1 mW
Posts: 17
Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 11 2022 10:32am

Yeah exactly hope the guy can help you! And if you could share it that would be awesome! I really tried everything I’m thinking about lowering the ratio to speed at 500, 1000, 1500 to 80, 90, 100% maybe this will help? Haven’t tried it yet..

dominik h   100 W

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Joined: Jul 24 2021 2:12am

Re: Nanjing far driver controllers

Post by dominik h » Jan 11 2022 11:55am

Is this problem only with no load?
My Sabvoton is also tourqe controlled.
With no load 2% throttle is Max rpm.
On the road everything acts very Smooth.
My 96850 will arrive in a few days.
Last edited by dominik h on Jan 11 2022 2:27pm, edited 1 time in total.

MMD   1 mW

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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 11 2022 1:08pm

That could also be the case! I haven’t tried it on the road only on the bench maybe that’s it. I will give it a try this weekend and let you guys know.

DEHiCKA   100 mW

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Posts: 43
Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 11 2022 3:02pm

Yes, it is with no load or in low traction like mud or snow. If the wheel sleeps it'll spin like a mad dog.
Today I have tested it on snow, it is hell crazy comparing to the old Kelly on the same current settings.

Low RPM, Mid RPM params should provide limiting points as I was told, but it does not work.
I have set Low RPM to 1000, Mid to 2000, but it did not change anything.

Nuc also can limit torque+RPM with throttle:
Speed+torque — combined mode (as Kelly), similar to the operation of the gas pedal in a car with an internal combustion engine.
In the case of selecting the Speed+torque mode, pressing throttle to 50%, when achieved 50% speed, the current consumption will be reduced to hold speed. The acceleration current will also be proportionally lower.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

larsb   10 MW

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Location: Gothenburg, Sweden

Re: Nanjing far driver controllers

Post by larsb » Jan 13 2022 2:22am

Stevebequik wrote:
Jan 04 2022 6:22am
I understand the Qs138 is a 3 phase, 12 slot, 4 coil pairs with 5 magnet pairs motor.
FarDriver is counting coil pairs, not magnet pairs.
4 is correct and is self detected & hence why you can’t change it.

I finally have my crf250 72530 qs138 v3 up and running.
Impressive power output.
Need to do some more testing. Seems to run quite hot compared to the nuc24 it replaced.
But It is summer in norther Oz.
There is no way for a controller to identify "coil pairs" in any controller as far as i know. Where did you get this understanding? I don't see how magnet poles would be identified either as a 12 pair motor run at x rpm gives exactly the same signal output as a 6 pair motor run at 2x rpm.

What "coil pairs" are electrically will depend on if coils are connected in wye or delta and with coils in serial, parallell, half parallell connection so it is not possible in general to say that a 12 slot motor has 4 pairs.

MMD   1 mW

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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 16 2022 5:30pm

dominik h wrote:
Jan 11 2022 11:55am
Is this problem only with no load?
My Sabvoton is also tourqe controlled.
With no load 2% throttle is Max rpm.
On the road everything acts very Smooth.
My 96850 will arrive in a few days.
So I tried the Fardriver on my ktm where normally the Votol sits. This is the worst controller I every used in my life! The throttle delay is ridiculously dangerous!! When releasing the throttle the rpm keeps rising for about 0.5/1sec until it drops down. Also the power was way weaker than my votol em150. I set it to 200amps like the votol but it only gave me 174amps.. When I turned it up to 240amps it finally gave me 200amps but it still felt weaker than the votol. I removed it right after the test ride and installed the votol back right away. I will never buy a fardriver again. Maybe they work great on hub motors but on mid drive motors they are a pain in the ass!!

DEHiCKA   100 mW

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Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 18 2022 5:06am

MMD wrote:
Jan 16 2022 5:30pm
This is the worst controller I every used in my life! The throttle delay is ridiculously dangerous!!
With Throttle rate maxed out, I did not feel any delay at all on my QS120.
On throttle release it's instantly free wheeling with motor braking and recuperation turned off.
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

MMD   1 mW

1 mW
Posts: 17
Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 18 2022 5:11am

DEHiCKA wrote:
Jan 18 2022 5:06am
MMD wrote:
Jan 16 2022 5:30pm
This is the worst controller I every used in my life! The throttle delay is ridiculously dangerous!!
With Throttle rate maxed out, I did not feel any delay at all on my QS120.
On throttle release it's instantly free wheeling with motor braking and recuperation turned off.
Can you show me your settings? Because I think I tried everything to get rid of it and didn’t succeed.. It was unridable like this.

Jrbe   100 W

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Location: CT USA

Re: Nanjing far driver controllers

Post by Jrbe » Jan 18 2022 10:36am

Have you verified the throttle has a smooth voltage swing as you increase the throttle? This sounds like it could be a hardware (throttle potentiometer) or maybe a wiring issue.

MMD   1 mW

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Joined: May 29 2020 1:16pm

Re: Nanjing far driver controllers

Post by MMD » Jan 18 2022 10:54am

Jrbe wrote:
Jan 18 2022 10:36am
Have you verified the throttle has a smooth voltage swing as you increase the throttle? This sounds like it could be a hardware (throttle potentiometer) or maybe a wiring issue.
Yes I tried 3 different throttles all the same..

DEHiCKA   100 mW

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Joined: Mar 15 2015 4:16am
Location: Troy

Re: Nanjing far driver controllers

Post by DEHiCKA » Jan 21 2022 9:18am

MMD wrote:
Jan 18 2022 5:11am
Can you show me your settings? Because I think I tried everything to get rid of it and didn’t succeed.. It was unridable like this.
It the same as I have posted earlier in this thread. I have only limited the max RPM and turned on motor braking.
If Throttle rate is maxed out to 224 it is instant response.

Also found out ECO throttle curve can be tuned by ECO coeff parameter.
8 - is closest to the linear (but still very different) , 1 - furthermost (very slow rising in the first half).
Trials 49KG middrive on modified stainless LMX frame
QS120/QS138 Geared + custom 8-62T #420/ 9-60T #428
Kelly KEB 315A/450A Peak/Fardriver 530A FOC/Nuc 24f
Michelin X-Lite 21"/18" Jitsie moto trials wheels

Stevebequik   100 mW

100 mW
Posts: 36
Joined: Mar 18 2019 7:35pm

Re: Nanjing far driver controllers

Post by Stevebequik » Jan 25 2022 6:01am

Hi Larsb,
This was the chinenglish response I got from the guy at FarDriver website.
Actually doesn’t make sense, as I believe the app tachometer reads too high.
Want to get hold of a handheld tacho to check.

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trophix   10 mW

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Joined: Dec 12 2018 11:40am

Re: Nanjing far driver controllers

Post by trophix » Jan 25 2022 4:27pm

I am having trouble getting the max speed and max torque on my far driver controller. Does anyone know what "test angel" and "unfollow"buttons mean? How do I use them?
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bilkenter   100 µW

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Joined: Jan 07 2019 3:00am

Re: Nanjing far driver controllers

Post by bilkenter » Jan 26 2022 1:29am

Hello Guys, I will use fardriver controller ND 72530 with QS 138 90H 4000W mid-drive motor. It will arrive in couple of days later. I will share my experience with you.

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