Redesigned hubmotor for mid drive

Electric Motors and Controllers
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Linukas
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Redesigned hubmotor for mid drive

Post by Linukas » Feb 11, 2018 6:48 am

for some time I'm working for liquid cooled hubmotors (mxus analogue), and their performance looks good, so now I'm trying to make something different from that motor.
Main thing is to make it for mid drive use, but with more power, thinking about it design something like big rc motors/emrax motor.
at first need to rewind it for 1T to get more rpm, expecting for 36kv:
Image

and some work with rotor:
Image
--
Linas
EV parts and service:
http://www.4motus.com
Product and Design:
http://www.neematic.com

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macribs
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Re: Redesigned hubmotor for mid drive

Post by macribs » Feb 11, 2018 7:50 am

Subscribed.

What controller do you plan to run? 1T motor will have very low inductance so can be hard on controllers. 1T motor should have maximum copper fill and thereby ability to take even more peak phase current. Unless you will experience unexpected problems with eddy current or that the low inductance cause FET burns that motor should punch out even more torque and if you use it as mid drive with reduction. And you could use reduction to about 400-500-600 max RPM for rear wheel. That should give reduction about 6:1 from motor to rear sprocket. You will have great torque both by motor alone and even more by reduction, and that motor should spin up under load like crazy fast.......torque monster

I root for you mate. This I look forward to see completed and tested.

Buk___
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Re: Redesigned hubmotor for mid drive

Post by Buk___ » Feb 11, 2018 9:12 am

Linukas wrote:
Feb 11, 2018 6:48 am
at first need to rewind it for 1T to get more rpm, expecting for 36kv:
Slightly off-topic for your thread, but I hope you'll indulge me.

From what I can see, your motor appears to be 56 pole-48 slot (I may have miscounted), could you explain how you arrived at your expectation of 36kv from that and 1T?

Thanks. Buk.

litespeed
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Re: Redesigned hubmotor for mid drive

Post by litespeed » Feb 11, 2018 9:54 am

Very cool. I'd like to see this one.

Tom
I'm married so you know I'm no stranger to pain!

Linukas
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Re: Redesigned hubmotor for mid drive

Post by Linukas » Feb 11, 2018 10:32 am

Buk___ wrote:
Feb 11, 2018 9:12 am
Linukas wrote:
Feb 11, 2018 6:48 am
at first need to rewind it for 1T to get more rpm, expecting for 36kv:
Slightly off-topic for your thread, but I hope you'll indulge me.

From what I can see, your motor appears to be 56 pole-48 slot (I may have miscounted), could you explain how you arrived at your expectation of 36kv from that and 1T?

Thanks. Buk.
it is 51 slot, 46 pole motor, similar to mxus 3000.
--
Linas
EV parts and service:
http://www.4motus.com
Product and Design:
http://www.neematic.com

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