Help with Q128 36V500W geared hub motor throttle heistation

[masserin]

I recently obtained a rear geared hubmotor kit from bmsbattery.
http://www.bmsbattery.com/ebike-kits/383-250w350w-q-85100sx-motor-bike-conversion-kit.html
There is a very significant hesitation/delay when you apply the throttle. Is this the nature of the beast since it is a freewheeling geared hub motor?

All of my other builds use direct drive motors with hall sensors which do not have any hesitation.

Is it appropriate to add resistance to the ground of the throttle? Would this modification decrease the hesitation?

Thanks in advance for any guidance.

 

[dogman dan]

When I've had gearmotors, there might be a very slight hesitation if you are already at speed. The motor will have to spin up to your traveling rpm before the clutch engages. But it's not a long hesitation at all.

Could it be your motor's clutch is sticky? That would be my best guess, your clutch (the internal freewheel) is not engaging immediately.

 

[DAND214]

Is it with halls or not?

I hade a few of the 128's with thier controllers. There was no hesatation. All had halls.

Dan

 

[masserin]

Thanks for the replys.

Yes, the motor and controller have hall sensors. I added an 120 ohm resistor to the ground of the throttle. The throttle response is acceptable but there is still a slight lag from when you press throttle to when the motor engages from a stop. When rolling there is a lag as well, but as dogman pointed out that is to be excepted.

 

[Eujangles]

Hi masserin,

any progress with this? I am having the same issue with the Q100 from bmsbattery.

Cheers

 

[d8veh]

If you're using one of the KU series controllers from BMSbattery, throttle hesitation is normal. It comes from the software in the controller. I'm not sure of the algorythm because I noticed that it's not always the same, but comes mainly if you don't use the throttle for a while.