Mini IPM Motor

okashira

10 kW
Joined
Nov 17, 2014
Messages
963
Location
Houston, TX
Here is a rotor with end cap taken off of a motor we got our hands on.
My buddy has the stator and housing so no pics yet.

Looks like 0.5mm lamination's
True IPM motor with saliency

Rotor weighs like 5 lbs. 2" diameter.

This aint no made in China hobby motor
Even better then an Astroflight motor I'd guess...

Were currently modifying the housing and bearing assembly to make it more usable.

Can't wait to see what we can get out of it. :D

3JR8p6q.jpg

FhQ6LM3.jpg

z9q3bpE.jpg
 
This remind me the new Zero IPM motor!

Except that the Zero have holes to save weight in the middle of the rotor.

I wonder that motor is rated mow many kW?

Doc
 
Thanks for the pics, okashira. Look forward to seeing the stator.

Re. comparison with the Astro motors. The rotor diameter on those is 1.69" (42.8mm). See illustration below.
 

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Miles said:
The most obvious difference is that the Cyclone has (effectively) a non-salient pole rotor.
Yes this motor definitely has saliency.
It's also a little bigger.
Sorry - pics of stator asap :)
 
flathill said:
whats it out of? power steering unit?
Nope, try again :)
Some hints.. before I get pics of stator. it's very well cooled rotor and stator
Best guess.. 5-7 kW max rated power
Designed for 400V
 
Tomdb said:
AC compressor :D

Is it a Denso unit? like the chevy volt?


Hmmm.. that wold be awsome i have acces to some of those!

Doc
 
Finally... someone got it :)
It was an AC comp motor from a Spark EV
We also pulled apart the Model S ac comp. Still working on it.
I think the laminations are like 0.25mm :O

Here are quick pics of stator:
yJzrvIr.jpg

S4CDqfN.jpg


One is the Model S stator, one is the Spark EV stator.

The model S rotor (pics soon) has an uneven OD, likely to reduce torque ripple?
 
do you know if these are filled with cooling oil... I see some liquid channel around the stator...

I think i'll have acces to one of these motor soon =)

Doc
 
Altair said:
The open bearing at the bottom of the case, that's a good example of planned obsolescence... :x
Let me clarify and answer Doctorbass's question at the same time
The entire motor is cooled by the working fluid of the a/c unit. Thus, no need to seal the bearing.
 
Wouldn't having a rotating rotor immersed in cooling fluid generate a lot of drag? And then generate heat as a result and reduce motor performance?
Maybe the cooling fluid is only circulating through passages in the case?
 
Do you own a motor that isn't immersed in a fluid? I'd like to see it
 
Yes, but air has a much lower density than... what do they use for cooling fluid in AC units? freon has been removed years ago
 
When oil-cooling was a fairly new idea for ebike motors, I recall someone around here spun up a non-hub motor and then lowered it into a bucket filled with fluid (Jeremy Harris?) to measure the no-load current, and it was nowhere near as bad as it was feared.
 
Altair said:
Yes, but air has a much lower density than... what do they use for cooling fluid in AC units? freon has been removed years ago
R134 is four times the density of air, but it's not a big deal. It's good design and I bet the motor averages 98% efficiency in use.
Still a hundred times less dense then oil or water
 
Hey, did anything ever come of this? Also, how much did that Spark EV unit cost?

I built a bike with the air conditioner from a Toyota Prius. So far its been quite good. Your spark motor looks to be quite a bit bigger than the Prius motor so I'm curious on how to get my hands on one.
My bike is here: https://endless-sphere.com/forums/viewtopic.php?f=6&t=95100
 
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