Help! KT Current Controller

RollingChunder

Pedelecer
Dec 7, 2023
93
35
Hi all, I need some help choosing a controller upgrade. I often see @saneagle recommending KT controllers and here is one I'm interested in:

48V Ebike KT Controller 35A 1500W Electric Bike Square Wave 12-FET UK | eBay

Yes, it's 35A for 1500W, yes, I have a 40A BMS. Maybe I'm using this to run a barley mill in my back garden?

I am looking for a controller specifically with current throttle control which I thought the KT controllers have. However, every listing says: Speed Setting: 1-4.2V. Which makes me think its a speed controller that just alters voltage when the throttle is turned. I have this set up already and hate how clumsy this is.

I want the feel of an analogue motorbike throttle that increases power to the, er, barley mill, not something that gives max current to a set speed/voltage then cuts out at each quarter turn.

As a side note my controller is silent and it would be nice to keep that feature.
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
5,207
2,509
Telford
We recommend KT controllers because of their excellent pedal assist function. The throttle function is the same as any other controller.

IIRC, Grin Technologies sell controllers that can be set up with current control for the throttle. Have a look at their Phaserunner programmable controller.
 

RollingChunder

Pedelecer
Dec 7, 2023
93
35
We recommend KT controllers because of their excellent pedal assist function. The throttle function is the same as any other controller.

IIRC, Grin Technologies sell controllers that can be set up with current control for the throttle. Have a look at their Phaserunner programmable controller.
Ah yes, well I'll probably leave it then as its not worth £300+ to me. Thanks for your help anyway.
 

AGS

Esteemed Pedelecer
Feb 12, 2023
563
174
Is there any particular reason you have chosen a square wave controller instead of a sine wave?

Here is an article explaining the difference between the two

 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
1,725
1,256
Hi all, I need some help choosing a controller upgrade. I often see @saneagle recommending KT controllers and here is one I'm interested in:

48V Ebike KT Controller 35A 1500W Electric Bike Square Wave 12-FET UK | eBay

Yes, it's 35A for 1500W, yes, I have a 40A BMS. Maybe I'm using this to run a barley mill in my back garden?

I am looking for a controller specifically with current throttle control which I thought the KT controllers have. However, every listing says: Speed Setting: 1-4.2V. Which makes me think its a speed controller that just alters voltage when the throttle is turned. I have this set up already and hate how clumsy this is.

I want the feel of an analogue motorbike throttle that increases power to the, er, barley mill, not something that gives max current to a set speed/voltage then cuts out at each quarter turn.

As a side note my controller is silent and it would be nice to keep that feature.
The 1 to 4.2V range is the controller's expectation of the voltage signal provided by the throttle. Using extremes that are not 0V and 5V means a variety of error conditions can be identified and handled appropriately.

This is completely separate from the control algorithm any particular controller might use.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
20,479
8,353
61
West Sx RH
36V/48V 1000W-1500W Brushless DC Torque Simulation Square ebike Electric Bicycle Hub Motor Controller with right output,Torque Simulation Square Wave controller (pswpower.com)

"Torque simulation" seems to be what I'm after. Anyone have experience with these? Will the torque simulation work on the throttle and not just PAS levels?
No , throttle is basically a thumb switch . On or off, basic speed control.
Controller isn't programmed for power graduation via a thumb throttle only via PAS for which it is excellant.
 
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saneagle

Esteemed Pedelecer
Oct 10, 2010
5,207
2,509
Telford