jimseko@yahoo.com
10 µW
- Joined
- Oct 7, 2017
- Messages
- 6
I'd like to share a little about myself before getting into this topic. I have hip pain and can't peddle a bicycle. I have not ridden a bicycle for six years until I put a 750 Watt mid drive Bafang motor on my son's mountain bike. I had so much fun riding my son's ebike, I wanted one for myself. I'm building a custom trike using carbon fiber/foam composite for the frame and 20" rear wheels. This bike will have no crank set because I have no use for pedals.
I plan to use this motor https://hobbyking.com/en_us/assault-700-series-530kv-brushless-outrunner-helicopter-motor.html?___store=en_us .
It's a 530 kV, 4500 Watt motor. The two stage gear reduction will include a HTD3m belt with 20:120 tooth pulleys followed by #219 chain with 12:90 tooth sprockets for an overall gear reduction of 45 to 1. Speed at 80% of unloaded max RPM will be about 27 MPH which is fast enough for me. I'm more interested in hill climbing ability and acceleration than top speed. I plan to use the open source VESC controller and take advantage of regenerative braking.
I'm a retired electrical engineer but I've never tackled a project like this. I'd love to have some input and suggestions before I purchase a motor and controller. Right now I'm spending my time building the carbon fiber frame and wheels.
I plan to use this motor https://hobbyking.com/en_us/assault-700-series-530kv-brushless-outrunner-helicopter-motor.html?___store=en_us .
It's a 530 kV, 4500 Watt motor. The two stage gear reduction will include a HTD3m belt with 20:120 tooth pulleys followed by #219 chain with 12:90 tooth sprockets for an overall gear reduction of 45 to 1. Speed at 80% of unloaded max RPM will be about 27 MPH which is fast enough for me. I'm more interested in hill climbing ability and acceleration than top speed. I plan to use the open source VESC controller and take advantage of regenerative braking.
I'm a retired electrical engineer but I've never tackled a project like this. I'd love to have some input and suggestions before I purchase a motor and controller. Right now I'm spending my time building the carbon fiber frame and wheels.