electricboard1
1 W
- Joined
- Nov 17, 2010
- Messages
- 53
I am currently building a multipurpose utility vehicle, which is an electric standup quad/scooter which can have a golf bag attachment on the back for the golf course and then doubles up as an electric powered beach cart with drop down handlebars and a cage which then bolts onto the back for hauling stuff to the beach.
My issue is..
obviously for the golf course I want it to cruise at around 18 miles an hour and have enough torque to power up slight hills but when I attach the cage onto the back and drop the handlebars for it to become a beach cart I want it to cruise along at walking pace.
I am running a 48v 1000w Brushless Escooter motor and had it geared so it would do around 15mph top end at first, however this made the acceleration far too aggressive and fast to walk along with in cart mode.
So I changed both sprockets to a 15 tooth front sprocket and a 68 tooth rear which according to the online gearing calculator says it should now do 23mph top end. (My thinking is make it faster top end to slow down the acceleration)
This new top end speed has slowed down the acceleration slightly and seems a little bit better to walk along with however the throttle still kicks in a bit too violent for me to use effectively.
After some research I found the posts regarding putting an inline trim Potentiometer in-between the black throttle cable and turn it til the motor spins then back it off slightly so the throttle is then set much closer to the start point of the trigger (so no more dead band at the beginning of the throttle) to smooth out the initial acceleration of my throttle and this seemed to work pretty good until I switch the quad off, then when I reconnect the battery to go again nothing works at all. What I have found is I then need to dial back the little potentiometer way back til it comes back to life and the motor works again, but then I have lost my setting and the throttle is aggressive again.
Am I right that maybe the speed controller isn't switching on when I have the potentiometer set so close the the beginning of the throttle band, does it maybe "think" someone is giving it a small amount of throttle and so not switching on??
Is there some kind of a throttle safety limit before the controller will power up?
As when I dial back the trim Potentiometer it then operates again but then is no good for me
Has anyone any ideas as to how I can set this trim Potentiometer close to the edge of the throttle starting point so it is smooth at slow speeds yet still be able to turn on the controller?
I used a 200ohm 10 turn trim Potentiometer as one of the posts suggests.
I'm just running out of ideas how to get this to work,
I didn't want to use a gearbox on the motor as I still want to have a bit of top end speed for the golf course yet need it to go slow speed for in cart mode
Any one have any clever ideas to get this figured out?
My issue is..
obviously for the golf course I want it to cruise at around 18 miles an hour and have enough torque to power up slight hills but when I attach the cage onto the back and drop the handlebars for it to become a beach cart I want it to cruise along at walking pace.
I am running a 48v 1000w Brushless Escooter motor and had it geared so it would do around 15mph top end at first, however this made the acceleration far too aggressive and fast to walk along with in cart mode.
So I changed both sprockets to a 15 tooth front sprocket and a 68 tooth rear which according to the online gearing calculator says it should now do 23mph top end. (My thinking is make it faster top end to slow down the acceleration)
This new top end speed has slowed down the acceleration slightly and seems a little bit better to walk along with however the throttle still kicks in a bit too violent for me to use effectively.
After some research I found the posts regarding putting an inline trim Potentiometer in-between the black throttle cable and turn it til the motor spins then back it off slightly so the throttle is then set much closer to the start point of the trigger (so no more dead band at the beginning of the throttle) to smooth out the initial acceleration of my throttle and this seemed to work pretty good until I switch the quad off, then when I reconnect the battery to go again nothing works at all. What I have found is I then need to dial back the little potentiometer way back til it comes back to life and the motor works again, but then I have lost my setting and the throttle is aggressive again.
Am I right that maybe the speed controller isn't switching on when I have the potentiometer set so close the the beginning of the throttle band, does it maybe "think" someone is giving it a small amount of throttle and so not switching on??
Is there some kind of a throttle safety limit before the controller will power up?
As when I dial back the trim Potentiometer it then operates again but then is no good for me
Has anyone any ideas as to how I can set this trim Potentiometer close to the edge of the throttle starting point so it is smooth at slow speeds yet still be able to turn on the controller?
I used a 200ohm 10 turn trim Potentiometer as one of the posts suggests.
I'm just running out of ideas how to get this to work,
I didn't want to use a gearbox on the motor as I still want to have a bit of top end speed for the golf course yet need it to go slow speed for in cart mode
Any one have any clever ideas to get this figured out?