Kunteng Controller and compatible torque sensor

Electric Motors and Controllers
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Pegazus   10 mW

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Joined: May 18 2019 8:40am

Kunteng Controller and compatible torque sensor

Post by Pegazus » Sep 17 2019 3:45am

Hi,

I have a nice Kunteng controller but I'm struggling with the pedal assist.

I first bought a KT-V12L but as described by many people the feeling is not really good.

https://fr.aliexpress.com/item/32866352633.html

I would like to move on a real torque sensor like the sempu T4.

https://fr.aliexpress.com/item/32952233498.html

Could anyone tell my what are the compatible torque sensors that could work with the KT controller ? I'm interested in references even if it is not plug and play. :thumb:

Thanks

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stancecoke   100 kW

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Re: Kunteng Controller and compatible torque sensor

Post by stancecoke » Sep 17 2019 6:57am

I recommend the e-rider sensor

https://www.aliexpress.com/item/3303013 ... b201603_53

The working principle and pinout is the same as the Sempu T4, but the geometry of the turning shaft is better, no groove for the circlip.

It works perfectly with our open source firmware for the Kuntengs, see my signature.

regards
stancecoke
Last edited by stancecoke on Sep 17 2019 9:10am, edited 1 time in total.

Pegazus   10 mW

10 mW
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Joined: May 18 2019 8:40am

Re: Kunteng Controller and compatible torque sensor

Post by Pegazus » Sep 17 2019 7:17am

I don't understand the wiring.

On my KT controller input I have :
- 1 red wire : +5V
- 1 black wire : GND
- 1 white wire : PAS signal

On the other side, on the e-rider or sempu, I have 4 wires :
- 1 red wire : +8-12V
- 1 black wire : GND
- 1 white wire : torque signal
- 1 green wire : speed signal

The is 1 wire in excess and the required voltage power which is too high.

How is it possible to manage that ?

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stancecoke   100 kW

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Re: Kunteng Controller and compatible torque sensor

Post by stancecoke » Sep 17 2019 7:32am

36v --> DC/DC step down --> 12V --> red wire (supply)

gnd --> black wire (gnd)

PAS signal --> green wire (speed)

throttle signal --> white wire (torque)

If you want to use a throttle in parallel, you have to use pad X4.

regards
stancecoke

Pegazus   10 mW

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Re: Kunteng Controller and compatible torque sensor

Post by Pegazus » Sep 17 2019 7:43am

It definitely make more sense using the throttle signal wire !

But what is a pad x4 ?

john61ct   1.21 GW

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Re: Kunteng Controller and compatible torque sensor

Post by john61ct » Sep 17 2019 8:26am

How does the above option compare to using CAv3 ?

Setting cost aside, assuming you already plan to buy one for other features?

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stancecoke   100 kW

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Re: Kunteng Controller and compatible torque sensor

Post by stancecoke » Sep 17 2019 9:07am

Pegazus wrote:
Sep 17 2019 7:43am
But what is a pad x4 ?
That's a solder pad on the pcb for an additional analogue input.
Image
john61ct wrote:
Sep 17 2019 8:26am
How does the above option compare to using CAv3 ?
Pros:
--> No additional hardware (and no quite ugly display :-))
--> completly free configurable
--> bluetooth + cellphone app available

Cons:
--> just a hobby project, no professional support

regards
stancecoke

Powerhour   100 mW

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Re: Kunteng Controller and compatible torque sensor

Post by Powerhour » Sep 22 2019 2:38pm

The fact this eliminates the need for a ca3 kicks so much ass

john61ct   1.21 GW

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Re: Kunteng Controller and compatible torque sensor

Post by john61ct » Sep 22 2019 3:36pm

Except with the CAv3, the torque sensing PAS is just one feature out of dozens, in fact one that's probably use much les frequently than the others.

Pegazus   10 mW

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Re: Kunteng Controller and compatible torque sensor

Post by Pegazus » Sep 23 2019 2:25am

Thank you very much for the explanation ! :thumb:

Powerhour   100 mW

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Re: Kunteng Controller and compatible torque sensor

Post by Powerhour » Sep 23 2019 4:38pm

john61ct wrote:
Sep 22 2019 3:36pm
Except with the CAv3, the torque sensing PAS is just one feature out of dozens, in fact one that's probably use much les frequently than the others.
This is actually one of the CA3's main selling points, because it has a wide range of presets for torque sensors along with the ability to configure any sensor with any controller, and I don't think there's really many other options out there for that besides this firmware. Other than that the CA3 is a throttle hacker and output monitor on a dot matrix screen. With this firmware, I can see that I can also edit the gains and ramps etc as well. Plus a graphic interface for monitoring, including phase patterns, back emf etc? Pretty kickass stancecoke nice work I'm stoked about it

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