LI-ghtcycle
10 MW
Ok, I am about to join the "dark side"!! :lol:
I'm wanting to see what is possible with a pretty basic mid-drive design and a little shade-tree mechanicing!
I want to make my first foray into the world of ridiculously fast E-Biking!
Here are my main concerns:
1) How to find the limits of a motor and NOT melt it!
2) How beefy do I need to make my Phase & Battery wires to keep things sound at 100V 30A?
3) How much money should I expect to budget for these kinds of up-grades?
I'm wanting to make this my first truly high-end high-power project, all silicone wire, I'm guessing I will need to use 10G starting at the exit of the motor, from the battery and to the controller for phase & battery connections?
I'm also wondering what the best way to manage heat, being an in-runner I don't know if I can ventilate like I could with a out-runner hub motor, and I know that I could make some rudimentary cooling fins of aluminum on the case, however, I'm not against an elaborate active cooling method, I'm thinking some form of water misting might be ideal?
And this motor:
http://www.goldenmotor.com/
(The one to the far right, the 800W)
Spec sheet:
http://www.goldenmotor.com/hubmotors/BLT-800W Performance Curve.jpg
From the listed specs, I am already seeing that this motor is designed to run between 24 - 60V nominal, and being such a large heavy motor, I am hoping it has a pretty good copper fill, but I have no idea about this kind of thing, and I know this isn't a well known motor, but I'm curious to get everyone's input.
Here is what I know:
The motor is listed by the manufacturer as a motor that will run at 1160 RPM's at 48V (on the spec sheet it's actually about 41V) however, at no-load, it will spin at 2800 RPM's.
I have backwards calculated the Kv's and it's a 28.4 KV motor if you go with the "working rpm's" as listed with 1160 @ 41V according to the spec sheet's efficiency rating (correct me if there is a better explanation on that spec sheet, I'm still learning about this) so my thoughts are to slowly work my way up to 100V and see what happens.
My major advantages with how the motor & controller are mounted on the bike now are that I can at a moments notice put my hand down to check the motor & controller to make sure they aren't getting too hot.
I will be building a purpose build frame with the help of my neighbor in most likely 20 inch BMX style steel with extended wheel base for the final prototype to take to the local race track, but I am hoping I can test the various voltages on my current bike and push the limits enough to know if 100V would be too much, or if say 84V or something else in between would better?
Thanks!
I'm wanting to see what is possible with a pretty basic mid-drive design and a little shade-tree mechanicing!
I want to make my first foray into the world of ridiculously fast E-Biking!
Here are my main concerns:
1) How to find the limits of a motor and NOT melt it!
2) How beefy do I need to make my Phase & Battery wires to keep things sound at 100V 30A?
3) How much money should I expect to budget for these kinds of up-grades?
I'm wanting to make this my first truly high-end high-power project, all silicone wire, I'm guessing I will need to use 10G starting at the exit of the motor, from the battery and to the controller for phase & battery connections?
I'm also wondering what the best way to manage heat, being an in-runner I don't know if I can ventilate like I could with a out-runner hub motor, and I know that I could make some rudimentary cooling fins of aluminum on the case, however, I'm not against an elaborate active cooling method, I'm thinking some form of water misting might be ideal?
And this motor:
http://www.goldenmotor.com/
(The one to the far right, the 800W)
Spec sheet:
http://www.goldenmotor.com/hubmotors/BLT-800W Performance Curve.jpg
From the listed specs, I am already seeing that this motor is designed to run between 24 - 60V nominal, and being such a large heavy motor, I am hoping it has a pretty good copper fill, but I have no idea about this kind of thing, and I know this isn't a well known motor, but I'm curious to get everyone's input.
Here is what I know:
The motor is listed by the manufacturer as a motor that will run at 1160 RPM's at 48V (on the spec sheet it's actually about 41V) however, at no-load, it will spin at 2800 RPM's.
I have backwards calculated the Kv's and it's a 28.4 KV motor if you go with the "working rpm's" as listed with 1160 @ 41V according to the spec sheet's efficiency rating (correct me if there is a better explanation on that spec sheet, I'm still learning about this) so my thoughts are to slowly work my way up to 100V and see what happens.
My major advantages with how the motor & controller are mounted on the bike now are that I can at a moments notice put my hand down to check the motor & controller to make sure they aren't getting too hot.
I will be building a purpose build frame with the help of my neighbor in most likely 20 inch BMX style steel with extended wheel base for the final prototype to take to the local race track, but I am hoping I can test the various voltages on my current bike and push the limits enough to know if 100V would be too much, or if say 84V or something else in between would better?
Thanks!