Hello all. This is my first post, having chosen this forum as having the most smart cheapskates! I'm not an electrical guru, but like to think I'm smart enough to learn and not afraid of research. DIY type too...even if I had the moolah for a kit. Thank you all in advance for any help with my project!
The bike:
A steel cruiser...old, strong, and heavy. IDK what brand, but it was distributed out of Seattle, WA. I'll likely keep coaster brakes rear, mod front disc, and maybe implement a motor brake too.
I want this bike to be a hot rod for "drag racing" my buds. Likely a single speed 66cc china girl, for one.
The motor:
Undecided, but leaning toward an alternator motor. 100A high output to match the other components. I'll add hall sensors or something for high torque, but NOT spend over $100 on a PM rotor! I've toyed with the idea of an auto. starter too. It would have the best torque of the two, but I'm not a welder so I'd have to outsource attaching a pulley or sprocket to the shaft.
The tranny:
Single speed direct drive on the left. Jackshaft, if neccesary.
The fuel:
(2) 12V SLA/UPS wired in series for 24V. These are meant for fast discharge rates, at 130A for 5 seconds. They'd need not last for more than a couple drag races. They're cheap, not nearly as heavy as a single car battery, and lipos can't match the amp draw from my understanding.
Speed control:
Brushless ESC/6s/100A to power the altermotor. 24V ebike throttle. I'd probably first try to power the field with the 5A BEC output. That could provide good torque, albeit lower rpms, but I'm not looking for high top speed here...40-45 mph at the most. All in the gearing, I hope! When that fails, maybe I'll use an Arduino to contoll the current, or switch to sensored and use halls.
There's the game plan...whatcha think? Inefficient...yes, but if the cells last 2-3 races, don't care.
Heat problems...I hope not for 15-30 seconds at a time. Other motors/setup suggestions encouraged!
The bike:
A steel cruiser...old, strong, and heavy. IDK what brand, but it was distributed out of Seattle, WA. I'll likely keep coaster brakes rear, mod front disc, and maybe implement a motor brake too.
I want this bike to be a hot rod for "drag racing" my buds. Likely a single speed 66cc china girl, for one.
The motor:
Undecided, but leaning toward an alternator motor. 100A high output to match the other components. I'll add hall sensors or something for high torque, but NOT spend over $100 on a PM rotor! I've toyed with the idea of an auto. starter too. It would have the best torque of the two, but I'm not a welder so I'd have to outsource attaching a pulley or sprocket to the shaft.
The tranny:
Single speed direct drive on the left. Jackshaft, if neccesary.
The fuel:
(2) 12V SLA/UPS wired in series for 24V. These are meant for fast discharge rates, at 130A for 5 seconds. They'd need not last for more than a couple drag races. They're cheap, not nearly as heavy as a single car battery, and lipos can't match the amp draw from my understanding.
Speed control:
Brushless ESC/6s/100A to power the altermotor. 24V ebike throttle. I'd probably first try to power the field with the 5A BEC output. That could provide good torque, albeit lower rpms, but I'm not looking for high top speed here...40-45 mph at the most. All in the gearing, I hope! When that fails, maybe I'll use an Arduino to contoll the current, or switch to sensored and use halls.
There's the game plan...whatcha think? Inefficient...yes, but if the cells last 2-3 races, don't care.
Heat problems...I hope not for 15-30 seconds at a time. Other motors/setup suggestions encouraged!