Guide to Hall Sensor Throttle operation, testing, and modification.

[Tommycat]

This has been my go-to thread for trying to understand PAS verses torque sensing for ebikes. It does include some typical voltage outputs.

https://ebikes.ca/learn/pedal-assist.html

T.C.

[Tommycat]

Hi akom,
And welcome to the forum!

Looks like an awesome project! Thank you for contributing and sharing it. Adding bookmark now. :-)

Best regards,
T.C.

[akom]

I tried the beatiful schematics listed in https://electricbike.com/forum/forum...0588#post70588 and was not entirely happy with the results. Everything seemed like a compromize, I was either not getting the smoothing or losing top speed.

I gave up and used an Arduino to smooth my jumpy throttle, remove deadband, and add a knob-adjustable speed limit. If that helps anyone, here is the project:

https://github.com/akomakom/arduino-throttle-smoother

[Tommycat]

I'd P.M'd Leon about his interesting project with questions, but as of today he is just a one and done.
Reminder to just post in the "troubleshooting" section for best results... ;-)..

[Tommycat]

Hi angelovola80,
And welcome to the forum! :-)

As your throttle voltages are good, my gut intuition would be a change in battery voltages or perhaps a damaged throttle cable. I recommend that you re-post this problem issue in the "troubleshooting" section seen here... https://electricbike.com/forum/forum...ouble-shooting
With full disclosure of your previous battery, and it's replacement. Model, type, voltages, homebuilt? Cell type? ECT... Details and wiring diagrams of your controller, throttle assembly, and other information of your system will be helpful and eliminate guesswork. The more the better!

See you over there!

Regards,
T.C.

[angelovola80]

Hello. I have a problem with my bike. Following a total discharge of the lead acid battery (now replaced with a lithium), the accelerator no longer works. I measured the voltages and they are all correct (0.8V-4.3V). The engine runs at maximum if I press the button with the cables of the same throttle sheath (cruis controll?). I have no way of analyzing software controller settings. What may have happened?

[Leon]

Hi Thommycat, I have read your very interesting article on the throttle of the bldc engine. I want to make a cable car from an Electric wheelbarrow wheel, BLDC motor. I want to replace the throttle with a 10k potentiometer. the engine should start up slowly. I want to extend your schematic with the transistor capacitor and potentiometer with a 10 k potentiometer. to set the forward speed. I place a switch in the 5 volt line so as not to have to turn the potentiometer to zero all the time. do you think this will work?

[AZguy]

Didn't know there was a double post

Double posts suck

I'll bow out

[Tommycat]

Hey fellas, how 'bout keeping everything in one spot... Thanks.

https://electricbike.com/forum/forum/main-forum/trouble-shooting/146394-e-scooter-throttle-response-issue

[jakesontap]

Hey AZguy!! I was thinking the same thing but I replaced both the controllers and the throttle and it’s still doing the same thing…? Checked the motors halls with a tester and they checked good.

[AZguy]

If the throttle is working properly the lag would almost certainly be a controller issue

If the throttle isn't working properly then replace the throttle

If you have a reasonably fast responding voltmeter you should be able to see whether the throttle is working properly when released - only connect the power wires to the throttle and watch the throttle output with the meter

[jakesontap]

Do you think if I add a 50k resistor between the signal and ground wire it will drop the signal voltage faster but keep the current pull low? Just trying to figure out how to remove the throttle lag when releasing throttle.
thanks!!!!

[jakesontap]

Hey Tommycat!! Thanks for the wonderful information!!!
was wondering if you may have a solution or have seen this issue in the past. I have a hall type throttle (LH-100) on a 60v setup. When I release the throttle I have a good second lag where the motors are still getting power before the power is released and she starts decelerating. I have replaced both the throttle display and the motor controllers but problem is still there. Any thoughts? Thanks!!!!!!

Also, if I hit the brake right as I release the throttle the power does stop. This is pretty scary when you are going 40+ mph!! Lol

[RadoBG]

I did a resurch. Cant I use a mickrokontroler like arduino mega2560 to convert the output and I can also ad some other features:) then you can do what ever you want. You have a fooly programable throtel

[Tommycat]

Hi RadoBG,
And welcome to the forum! :-)

I have found that resistance alone is not capable of producing the voltages/current you desire. But AZguy came up with a solution that uses a MCP6041 Opamp circuit that will do exactly what you want!
See the diagram for it here...
AZguy's Opamp Hall throttle (.08 to 3.6vdc) to Pot throttle output (0 to 5vdc) Mod.

Note: I have not yet personally tried this, but it sounds like it has been very successful. When I do I will add it to this thread.

Regards,
T.C.