Username1
100 W
- Joined
- Nov 26, 2013
- Messages
- 170
I have been learning about various kinds of motors including switched reluctance. It seems like they could make the ideal direct drive hub motor...
Their advantages over pm motors include:
- 0 drag when off/coasting
- high efficiency over a much broader speed range (great for low rpm)
- no magnets to overheat
- motor itself is extremely simple and cheap to construct (controller excluded)
Downsides include:
- noisy (not sure if this can be fixed or not)
- needs sophisticated controller (doesn't pm also need this?)
- possibly a little lower torque (altough maybe in low speed high torque dd scenarios this wouldn't apply)
Why aren't these being sold for ebikes etc. or why hasn't someone attempted to build one? What's your opinion on this kind of motor used for dd hubs?
Their advantages over pm motors include:
- 0 drag when off/coasting
- high efficiency over a much broader speed range (great for low rpm)
- no magnets to overheat
- motor itself is extremely simple and cheap to construct (controller excluded)
Downsides include:
- noisy (not sure if this can be fixed or not)
- needs sophisticated controller (doesn't pm also need this?)
- possibly a little lower torque (altough maybe in low speed high torque dd scenarios this wouldn't apply)
Why aren't these being sold for ebikes etc. or why hasn't someone attempted to build one? What's your opinion on this kind of motor used for dd hubs?