Throttle voltage range

[ebikeFan1234]

I am new to controller programming (Sabvoton 72150) and curious about throttle voltages. basically

1. How does the throttle voltage affect motor power or torque?
2. What is the connection between "responsiveness" of throttle and voltage
3. Suppose the throttle min voltage is increased by a bit, what would it do?
4. Normally throttle range is about 5v. What would reducing the range do, suppose make it 4v. does that make the throttle more jumpy since it has a narrower range to affect motor performance

These are all newbie questions. Would appreciate a detailed explanation of the concept and the specific queries

 

[E-HP]

Comprehensive info on hall based throttles:

Guide to Hall Sensor Throttle operation, testing, and modification. - Electricbike.com Ebike Forum

***** 8-16-2018 Welcome to the Hall Sensor Throttle Thread! If there is something you'd like to add, correct, needs better explanation, or have a question about... feel free to Private Message me. Better yet, open a new thread in the "Trouble Shooting...

electricbike.com

Most of your questions are controller related (and what the controller does with the throttle signal) rather than throttle, although you can tune the physical throttle to eliminate dead zones. At 20S, you wouldn't want to reduce the throttle range; you'd want to maximize it.

 

[ebikeFan1234]

Thanks @E-HP !!

For my case (Sabvoton 72150 controller, paired with QS 273 2.5T motor), I understand from your referenced article that increasing the low end throttle voltage in MQCon app will make the bike more responsive, i.e a stronger acceleration from standstill.

in addition, the strategy to increase phase amps will further the effect
Plus raising the mid-throttle current will also add to responsiveness

Does this sound about right?

 

[TommyCat]

understand from your referenced article that increasing the low end throttle voltage in MQCon app will make the bike more responsive, i.e a stronger acceleration from standstill.

In the article, the low end voltage adjustment has more to do with eliminating the dead-band between the throttle’s home position and when the motor is first energized on twisting throttle. The closer you can be, the more control, stroke, and less hesitation.
Not necessarily a stronger accelleraton.

The low end throttle voltage setpoint in the app on the other hand. Seems to me to do the same. Yet in the opposite direction. You want to set it a little above the throttle’s home position of typically around .8vdc. Increasing it would add more unwanted dead-band instead of less.

in addition, the strategy to increase phase amps will further the effect
Plus raising the mid-throttle current will also add to responsiveness

These sound like the way to go for more get up and go.

Referenced manual…
http://www.mqcontroller.com/upfile/202108/2021083061461253.pdf



Regards,
T.C.

 

[ebikeFan1234]

I am going to try these settings out, hopefully soon.

Btw check out this video -

I am looking to tune my bike like his, so that it delivers strong acceleration from the get go. Not into wheelies but I appreciate his bike's performance. Apparently its K5 8 KW version. I haven't seen such a performance from other SB frame bikes. Can you take a guess what his settings are (motor turn, phase amps etc)? Several people have asked him in the comments but he hasn't answered.