Lishui Controller Modification - Firmware Flash Project

[Sparksandbangs]

As it stands these are my initial feelings on the Lishui controller compared to the KT.



Positives

- Graduated legal throttle rather than an on off switch

-Ability to increase the power on the start assist. On the old controller it always felt a bit weedy. Strangely on my other bike it felt too much.

- Power is increases the faster you pedal. At first I thought I would hate this but it makes sense when you are manoeuvring slowly through traffic. With the KT I found myself feathering the brake and slightly turning the pedals then back pedalling to achieve the same effect. It also feels more natural. Should you need a boost then the throttle can be blipped.

- Ability to manipulate the power assist levels as I see fit

- More configurable


Potential Positives

-Could put in a torque sensor should I feel the urge. Not on the radar but the potential is there.

Negatives

-It's a 48V system. I've lost the ability to use my 36V battery but thinking about it I can't see a good reason why I shouldn't try. The voltage levels would need adjusting but I can't see why not having a condition that says battery voltage below 44V means its a 36V battery and above it's a 48V couldn't be programmed in.

 

[saneagle]

I've tried controllers that give power in proportion to pedal speed, and I found them absolutely diabolical. In any gear, you start to pedal faster and faster as more power comes until you have to change up, which reduces pedal speed, which reduces power, so you don't have enough power to maintain that gear, so you change down, get a rush of power and go through the same thing again and again without ever reaching a balance of motor and pedal power. It's the sort of idea that sounds quite promising until you try it. After one ride of each, I chucked them in the bin. They were quite powerful controllers. Maybe you don't notice it so much with weak ones, like the difference between speed control and current control.

 

[Sparksandbangs]

I've tried controllers that give power in proportion to pedal speed, and I found them absolutely diabolical. In any gear, you start to pedal faster and faster as more power comes until you have to change up, which reduces pedal speed, which reduces power, so you don't have enough power to maintain that gear, so you change down, get a rush of power and go through the same thing again and again without ever reaching a balance of motor and pedal power. It's the sort of idea that sounds quite promising until you try it. After one ride of each, I chucked them in the bin. They were quite powerful controllers. Maybe you don't notice it so much with weak ones, like the difference between speed control and current control.

That's not how it felt. Maybe the torque simulation is more nuanced, who knows? Well maybe someone on the German forum but that would mean reading through 150 pages translated by Google.

I will give it a week of riding. I'll look out for the behaviour that you mentioned and report back. It does have a legal throttle. I think someone once mentioned that torque simulation and a legal throttle is best there is. ;-)

It's officially a 25A controller by the way.

 

[saneagle]

That's not how it felt. Maybe the torque simulation is more nuanced, who knows? Well maybe someone on the German forum but that would mean reading through 150 pages translated by Google.

I will give it a week of riding. I'll look out for the behaviour that you mentioned and report back. It does have a legal throttle. I think someone once mentioned that torque simulation and a legal throttle is best there is. ;-)

It's officially a 25A controller by the way.

The KT settings are P4=1 and C4 =3. It gives you a throttle that gives 4 mph without pedalling, max speed when pedalling (15.5 mph set) and maximum power when pedalling. That way, you get start assist and an instant max power over-ride for whatever pedal assist level you have set, so you can leave it on a lowish level, and every time you need a burst of power, you use the throttle, which saves going up and down the power levels all the time.

That's for a standard KT controller. I don't know how any of it relates to your software version.

 

[Sparksandbangs]

The KT settings are P4=1 and C4 =3. It gives you a throttle that gives 4 mph without pedalling, max speed when pedalling (15.5 mph set) and maximum power when pedalling. That way, you get start assist and an instant max power over-ride for whatever pedal assist level you have set, so you can leave it on a lowish level, and every time you need a burst of power, you use the throttle, which saves going up and down the power levels all the time.

That's for a standard KT controller. I don't know how any of it relates to your software version.

The legal settings are the same. 6kmph without pedalling. Pushing the throttle while pedalling gives a graduated output though. Push it all the way and you get max power, less that and you get proportionally less power.