High torque inrunner ?

qwerkus

10 kW
Joined
Jul 22, 2017
Messages
794
Does anyone know cheap high torque inrunner suitable for ebike conversion. Ideally 8 to 10cm width max, but up to 24cm diameter. 60-70Kv for a single stage reduction. Basically a fast spin DD hub motor, but configured as an inrunner, and not an outrunner. I've seen lots of different mid drive conversions using rc motors , but those are optimized for speed and have little torque without a high reduction ratio. Even cyclone / gng / LR motors & clone seems quite big and heavy for the amount of torque they can provide. So any thoughts on a "saucer" style inrunner ?
 
Using a geared hub, you can convert it to drive it's axle, if that's what you're after. See Crossbreak's thread about that.
https://endless-sphere.com/forums/viewtopic.php?f=28&t=45245
 
amberwolf said:
Using a geared hub, you can convert it to drive it's axle, if that's what you're after. See Crossbreak's thread about that.
https://endless-sphere.com/forums/viewtopic.php?f=28&t=45245

Thanks for the reply, but definitely not what i am looking for. I don t see the point of a geared hub mid conversion - those will always be limited by the smallish outrunner and heat stacking. Better go for a dual reduction hub like the g360 or the xiongda in that case.
What i am loocking for is an inrunner motor narrow enough to fit into a bike frame without causing cowboy legs due to insane q factor, but with a magnetic field length large enough for a decent torque - ergo a large diameter.
 
Low kv versions from here are interesting:
https://alienpowersystem.com/product-category/brushless-motors/
 
Tommm said:
Low kv versions from here are interesting:
https://alienpowersystem.com/product-category/brushless-motors/

Thanks for the input, but I'm not a huge fan of alienpower. Aside from quality issues, few inrunner here - mostly outrunners, which means dust and dirt will be an issue. Only option seems to be the well know 80100, but this motor is just too wide for optimal frame fitting. Also, their numbers seem hugely inflated: 6000W in a 1.6kg motor ? Maybe for 10s - than everything is fried.... Seems like gng / cyclone / lr small blocks are the only true game in town...
 
AFAIK the Motor you are looking for doesn't exist or is super expensive.

The only pancake Motor I can think of is this DC Motor:
http://www.everything-ev.com/index.php?main_page=product_info&products_id=292

The next widest thing would be something like the Big Block or the the QS1000W Motors:
https://www.aliexpress.com/item/QSMOTOR-1000W-BLDC-Mid-Drive-Motor/32980568522.html?spm=a2g0o.cart.99999999.486.79ab3c00IBSwwt
https://www.kellycontrollers.eu/hpm5000b-5kw-72v-leghuteses
http://www.eastgem.net/d4500.html
 
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