I have converted my bike to 48v 500w. Which display and controller do I need to buy to be able to modify the wattage in each PAS setting? For example, 50w for PAS 1, 120w for PAS 2, etc. I have a KT- LCD3 display now, and I have bought a couple of Chinese KT controllers from Amazon, but none seen to be able to do this. There is a YouTube video showing someone doing it on a HeyBike Mars, but I can’t seem to find anything elsewhere. Any help greatly appreciated.
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Which display and controller?
- Thread starter Scott000
- Start date
What end result in ride behavior are you after?
Meaning, what exactly do you want the bike to do for you, and how do you want it to do that?
Just having a certain power level for an assist level might not be what you really need for the result.
You might be better off with a system that has a continously variable amount of assist based on your real pedal cadence, (or torque) rather than separate assist levels that are just always on at the full amount of that assist level, if you are pedalling *at all*. (this is how I use the motors on my SB Cruiser trike).
Meaning, what exactly do you want the bike to do for you, and how do you want it to do that?
Just having a certain power level for an assist level might not be what you really need for the result.
You might be better off with a system that has a continously variable amount of assist based on your real pedal cadence, (or torque) rather than separate assist levels that are just always on at the full amount of that assist level, if you are pedalling *at all*. (this is how I use the motors on my SB Cruiser trike).
The couple of controllers I have purchased seem to have set PAS power levels. With the last one, PAS 1 was about 11 mph, and then PAS 2 jumped to 21 mph. I don’t want that big of a jump. I tried to limit the total speed, but then PAS 3, 4, and 5 were the same. That is, if I did it right.
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I don’t know why they jump that far. Possibly because the ones I’m buying are cheap…l’m looking for more even PAS levels. Say, 10 mph, 14, 18, 22, 26 for example. There is a post from 2021 that mentions it when setting up a KT.
”This eliminates the relevance of the bike's speed, instead basing it solely on the amount of power going to the motor for each PAS level (which can be set to your 'druthers using C5 and C14). In PAS 1 for instance you can set the power to 50w, and no matter what your speed,”
I imagine you need a controller that will allow this? Of course if I could find a controller that was set more even, I’d just buy it.
”This eliminates the relevance of the bike's speed, instead basing it solely on the amount of power going to the motor for each PAS level (which can be set to your 'druthers using C5 and C14). In PAS 1 for instance you can set the power to 50w, and no matter what your speed,”
I imagine you need a controller that will allow this? Of course if I could find a controller that was set more even, I’d just buy it.
This described the torque simulation mode that you can set in the KT display settings.
slaphappygamer
Regular
You can set P3 to 0 for “torque imitation sensor”.
You can also change C14 to change the intensity of the assist.
KT controllers have these settings.
slaphappygamer
Regular
slaphappygamer
Regular
Yikes! Definitely not ideal. Do you have a link to where you bought the display?
KT, Kunteng, is the manufacturer of the display, regardless of who sells or relabels it.
If you’ve found a different version, please provide a link to the manual. I’ve looked at least a half dozen manuals and they are the same, so if there’s an oddball out there, I’d like to update my faq with a note.
Thanks! Very odd. The P4 and C4 seem to focus on a lot of throttle options for some reason. Maybe our resident KT expert can chime in.
Edit: oops, P3, not P4.
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slaphappygamer
Regular
Amazing! Thanks for sharing. The description for P3 is slightly different, but appear to function the same.
PAS level dictates throttle speed, when set to 0. Throttle will be speed limited depending on PAS level.
When set to 1, "the throttle independent from assist levels and will provide maximum power regardless of the PAS level chosen", meaning "imitation torque control".
From the pdf I linked...
From the pdf you linked...
PAS level dictates throttle speed, when set to 0. Throttle will be speed limited depending on PAS level.
When set to 1, "the throttle independent from assist levels and will provide maximum power regardless of the PAS level chosen", meaning "imitation torque control".
From the pdf I linked...
From the pdf you linked...
docw009
Minor legend
THe thing with KT controllers is you cannot set individual power for the five assist levels. That was preset at the factory, What you can set is the max current level between 100% and 50% with the C5 parameter, That will change the assist levels uniformly.
I believe people are thinking all the KT displays are the same for P and C settings, but they apparently are not,
-The Dillinger LCD3 manual from 2016 and Electric Bike Outfitters from 2017 both says P3 =0 sets throttle strength proportional to the PAS level, weakest for PAS 1 and max for PAS 5. These are the two manuals I refer to.
I have the LCD9 which uses P3 to set torque simulation. Also the LCD7 which I left at default as I don't understand what it does,
I believe people are thinking all the KT displays are the same for P and C settings, but they apparently are not,
-The Dillinger LCD3 manual from 2016 and Electric Bike Outfitters from 2017 both says P3 =0 sets throttle strength proportional to the PAS level, weakest for PAS 1 and max for PAS 5. These are the two manuals I refer to.
I have the LCD9 which uses P3 to set torque simulation. Also the LCD7 which I left at default as I don't understand what it does,
docw009
Minor legend
If wanting individual control of speed limit and power for each PAS level, the bafang BBS02B mid drive does a good job there, although you have to buy a USB cable interface to access the screens that do this, Maybe their hubmotor controllers can do the same.. I don't recall seeing them sold individually, Usually on commercail ebikes.
The so called KT-LCD3 display I bought was a knockoff. It only had two setup parameters, and I could only access the setup once. The KT controller got hot as soon as I tried to use it. Due to the myriad of overseas manufacturers (you know where I mean) and the quality of some, it is difficult to mix and match and get something usable. I suppose the best method would be to stick to the bikes manufacture, but mine was a conversion, and I ended up having a couple of different brands on mine. I ended up buying a controller/display/throttle set and that works fine so far.
