how to make a speed limit switch?
- Thread starter parmenps
- Start date
bowlofsalad
100 kW
Some controllers can be changed via software (usb), I think you can also modify these kinds of settings using something like the cycle analyst. There are also three speed toggle switches. I found some using the term '3 speed toggle switch ebike' on a search engine. You might contact whoever sold you the controller and ask for some recommendations or for a solution on what would and would not work.
Joe Perez
100 W
Generally, the speed limit function is a property of the controller, which is selected via an external switch as bowlofsalad describes. The key point is that the switch is merely sending a command to the controller on a dedicated set of wires, and therefore the controller itself must be capable of this function.
Judging solely by the wiring diagrams provided at the Conhis Motor website (Link), there does not appear to be a provision for this function on the controller.
You could create a power limiter simply by splicing a resistive voltage divider with a some fixed ratio into the throttle line, however this would probably not accomplish what you want. It would merely limit the maximum throttle to about 50% (or whatever ratio you build into the divider), which would limit torque severely. This would have the side-effect of limiting speed, but at the cost of acceleration and hill-climbing power.
Judging solely by the wiring diagrams provided at the Conhis Motor website (Link), there does not appear to be a provision for this function on the controller.
You could create a power limiter simply by splicing a resistive voltage divider with a some fixed ratio into the throttle line, however this would probably not accomplish what you want. It would merely limit the maximum throttle to about 50% (or whatever ratio you build into the divider), which would limit torque severely. This would have the side-effect of limiting speed, but at the cost of acceleration and hill-climbing power.
speed Limit ? try to practise control the throttle pushing more or less. for my thumb throttle, I can go all the way at the same speed say - 30km/h. Im not sure if your throttle is thumb ? or yours is a Full twist throttle ?
Im using a greentime controller has a 3 way speed, But it doesn't work very well. when come to switch SLOW, for the 1/5th throttle press has NO response.so I took out switch build , so i run 100% full speed which will be smooth speed on ground.
Im using a greentime controller has a 3 way speed, But it doesn't work very well. when come to switch SLOW, for the 1/5th throttle press has NO response.so I took out switch build , so i run 100% full speed which will be smooth speed on ground.
Joe Perez
100 W
Heh. Yeah, that would be my first answer.kentlim26 said:
Apart from whatever local laws may govern e-bike speed, I have never understood why anybody would want to install a limit switch on one (outside of extreme applications, where you're running a 144 volt battery and yet still want daily-driver controlability.)
With a 50v, 30A power system on a 10T MAC geared motor, I have no difficulty at all using the thumb throttle to achieve whatever speed I wish.
Trackman417
10 kW
http://www.methtek.com/2012/07/03/universal-3spd-switch-works-with-any-controller/
Hope this works!
I have this thing on my bike and it works beautifully. I have it set so position 1 is like a kill switch.
If you want to adjust it, get a small screw driver and start turning the pots.
Enjoy.
Hope this works!
I have this thing on my bike and it works beautifully. I have it set so position 1 is like a kill switch.
If you want to adjust it, get a small screw driver and start turning the pots.
Enjoy.
Joe Perez
100 W
That's exactly what I described in post #3 of this thread. It isn't a speed limiter, it's a voltage divider which scales down the throttle, thus limiting power.Trackman417 said:
It's a bit like installing a mechanical stop which prevents the throttle from being pushed beyond a certain point.
edit: I'm not certain that this distinction is intuitively obvious to everyone.
