First time on the site and would love some help on this project I've been trying to put together. In a nutshell it's a foot scooter with an motor assist. The concept is a hybrid scooter, with the primamry power being your foot and secondary power being a small electric motor that kicks on with the push of a button. I don't have much experience with battery/motor/electrical/resistance calculations, so I'm a bit lost with puttting the parts together. Here are my questions...
The Facts:
person weight: 200
Goal: To be able to use a foot scooter (specifically, a Xootr http://www.xootr.com/kick-scooter_cruz.html) in it's normal foot powered capacity, but have an electric motor on board that acts as assist when already going a full speed. Ideally, would like to maintain 3-5 mph.
Questions:
1. If I'm only using the elctric motor as an assist, how big should the motor be? Here are the sizes I'm looking at...
http://www.allelectronics.com/make-a-store/item/DCM-130/24-VDC-135W-MOTOR-W/BELT-GEAR/1.html
or
http://www.allelectronics.com/make-a-store/item/DCM-1250/24-VDC-250W-MOTOR-11-TOOTH-SPROCKET/1.html
I'm starting to realize that the size of these motors will require a lot of battery power. So I'm looking for a nice compromise that keeps the battery weight low.
2. What's the best way to calculate battery life per motor (because the motor will only be an assist it doesn't need to last very long)?
3. Will I need any resistors between the batteries/chargers/switch?
4. I'll be using a slide design to move the motor on and off the back wheel, but I'm open to suggestions because I actually need a way to lock the motor in position. I'm currently thinking of just using my back foot to hold the motor in place.
Doable? or Am I knucking futs? Any input is appreciated.
The Facts:
person weight: 200
Goal: To be able to use a foot scooter (specifically, a Xootr http://www.xootr.com/kick-scooter_cruz.html) in it's normal foot powered capacity, but have an electric motor on board that acts as assist when already going a full speed. Ideally, would like to maintain 3-5 mph.
Questions:
1. If I'm only using the elctric motor as an assist, how big should the motor be? Here are the sizes I'm looking at...
http://www.allelectronics.com/make-a-store/item/DCM-130/24-VDC-135W-MOTOR-W/BELT-GEAR/1.html
or
http://www.allelectronics.com/make-a-store/item/DCM-1250/24-VDC-250W-MOTOR-11-TOOTH-SPROCKET/1.html
I'm starting to realize that the size of these motors will require a lot of battery power. So I'm looking for a nice compromise that keeps the battery weight low.
2. What's the best way to calculate battery life per motor (because the motor will only be an assist it doesn't need to last very long)?
3. Will I need any resistors between the batteries/chargers/switch?
4. I'll be using a slide design to move the motor on and off the back wheel, but I'm open to suggestions because I actually need a way to lock the motor in position. I'm currently thinking of just using my back foot to hold the motor in place.
Doable? or Am I knucking futs? Any input is appreciated.