limitation for a throttle ?

[Sparfuchs]

Hello EV friend,
i need your help. My problem is that most affordable controllers are not programmable and do only have a 3 speed switch to control max. speed. As far as i know the 3 speeds are 80%, 100% and 110 %, but what if the lowest speed option is not slow enough (max. 25 kph/15,5 mph) to be legal at a police control ? Is there a way to install a hidden potentiometer or switch to limit the max speed ?

Thanks for your help
best regards
Sparfuchs, Vienna

 

[TommyCat]

Sounds like this throttle mod would work nicely for you...

With more description and explanations in it's thread seen here...
https://electricbike.com/forum/foru...on-testing-and-modification?p=70588#post70588

Please read the safety warnings first...


Regards,
T.C.

 

[stepus]

I am a little bit sceptic about this schematic, it will lower voltage for hall sensor, and it can stop working under some voltage like 3V... Better i thing is connect trim pot as voltage divider from hall output, and centre of pot connect to original wire to controller

 

[TommyCat]

I am a little bit sceptic about this schematic,

Perhaps this output graph will help you...

it will lower voltage for hall sensor, and it can stop working under some voltage like 3V...

2.7vdc to be closer... Just a hair over half throttle input.

Better i thing is connect trim pot as voltage divider from hall output, and centre of pot connect to original wire to controller

Keep in mind that this would also lower the home position voltage, creating an unwanted front end dead spot before throttle actuation.

Please take the time to read the thread...
https://electricbike.com/forum/foru...r-throttle-operation-testing-and-modification

 

[Sparfuchs]

Sounds like this throttle mod would work nicely for you...

With more description and explanations in it's thread seen here...
https://electricbike.com/forum/foru...on-testing-and-modification?p=70588#post70588

Please read the safety warnings first...


Regards,
T.C.

Thanks a lot for your reply tommycat,
the solution looks very promising and could be exactly what i was looking for. I'll try that as soon as possible and will report about my progress.