Why can't we build this motor?

Skalabala

Skalabala

1 kW
Joined
Feb 5, 2014
Messages
416
Location
South Africa
Hi members :D

Is there a reason why this motor could not be built? In a smaller scale for a E-Bike? :twisted:

[youtube]6m_iIbX0gmA[/youtube]
 
Because we don't own the rights?

Perhaps you could ask Yasa if they have one in the works. I would guess that they don't because they don't see the market just yet. Maybe someday.
 
Miles. Do the core plates need to be coated with a non conducting material? Using clean metal laminations will act as a solid block?

There are more than enough potential on this forum to make a motor with the same KW/KG :twisted:
We need to work on it :p
That YASA motor will be cool in an E-Bike!
 
Personally, I've no interest in replicating the YASA motor. I want to find my own solution using that topology (which, after all, is just a NS type torus design with the redundant yoke removed).
 
That Yasa car motor looks great. Good luck to them.
I doubt they will make an ebike version because the premium money is in cars by probably many multiples.
Of course there is a demon in me thinking about some chinese group pulling apart this lovely motor and stealing their ideas for an ebike version and seeing it on ebay for $150 would be nice :)
 
TheBeastie said:
That Yasa car motor looks great. Good luck to them.
I doubt they will make an ebike version because the premium money is in cars by probably many multiples.
Of course there is a demon in me thinking about some chinese group pulling apart this lovely motor and stealing their ideas for an ebike version and seeing it on ebay for $150 would be nice :)
Click to expand...

Great idea! We need the chinese to see this motor! :D
 
Hillhater said:
Skalabala said:
.... We need the chinese to see this motor! :D
Click to expand...
I would be very surprised if they havent already seen & copied at least some part of it. !
Click to expand...

Theft of intellectual property? By the CHINESE??????

The only question is, will it work properly?
 
I think Miles can build it... Lets sponsor him :mrgreen:
Where do you guys think the secret is in this motor?
Lamination material?
 
Skalabala wrote:
Where do you guys think the secret is in this motor?
Lamination material?
Click to expand...

At a guess very efficient active cooling of the stator to allow for the high current and halbach array to minimise rotor weight would be my 2cents.

Cheers

Mark
 
I think Lebawsky has something close to this :D
Can't wait to get time to play!! The lathe and mill is rusting! :oops:
Water cooling looks easy to me but I like something that has good torque and efficiency.
Can I cut up a ceiling fan stator and loosen lams from each other and "re-seal" them? Think the no core motors are something to think about.
Where can one buy time? The chinese must have gotten an idea by now to sell time :p
 
I looked into the coolant port on one of these motors.
They use non-conducting coolant and that is circulated around the coils.
One could actually see the coils through the coolant port.
SO thats the cooling part of it.

I'll see if I can dig up the pictures I took of it.
The company I saw it at was using a sevcon gen5 controller to run it.
I guess with help both from YASA and Sevcon.

This is the company I visited.
http://www.electroengine.com/

They have their own version of the YASA on some kind of licence production.
But I'm not shure if they have produced more than a couple of test examples.

They were heavily involved in the SAAB electric car program before NEVS bought SAAB.
They used prismatic cells from EIG.


Regards
/Per
 
Sounds awesome pm_dawn! :D
Dig deep for those pictures! :)
 
has anyone ever seen ( out of utube !!) these motor runing full load on car or plane or truck or on what so ever :?:

I have read the pattent twice and , I got some doubs about the all things , it looks like a nice business fake , especially when you look at the numbers they claims out :roll:

they may have some torque , but 750 Nm its somethings serious :shock:

in my way to build my own AFPM with "only" 200 Nm , I have seen many try around , but not many real "torquey" motors

I may be wrong , after all I am not a real specialist :mrgreen:
 
I think there figures are realistic, in fact I think I can do better. Not at the weight they are managing but I don't see the problem with an extra 10 or even 20 kilo when its intended for a car.

The high torque is gained by a large area of magnets at a large radius. The torque is proportional th the area of the magnets but increases with the square of the radius. Axial motors have a greater radius than similarly sized radial motors but because of the power density the problem becomes cooling.

You can also reach a limit with the saturation of the coil cores. YASA are using a soft magnetic composite for the cores which is not practical for a DIY so I am going to use the lamentations from the "I" bar of a transformer and cast them inside magnetite to to get as high field as I can but this will be the limiting factor in my motor as my cooling should be more than adequate. As my cooling is so good the continuous power should be very high with with the peak only a little higher due to the saturation limit.

Have a play with my calculator if you want to see what torque can be produced with an axial motor.
http://endless-sphere.com/forums/viewtopic.php?f=30&t=59526
 
I will start the various test I plan for my motor in two weeks ( which is very close o the Yasa dimensions ) , i will tell you after that what torque , efficiency , losses , and so on I got :wink:
 
I met the guys from YASA at the Niche Vehicle Network Symposium in the UK a couple of months back.

There were lots of others there with far greater knowledge of electric motors and electronics than I and it didn't seem as if their opinion of YASA was anything less than first class.

Not only that but the head guy on the day there from YASA said that they weren't averse to selling to the individual, but they wanted to know that that individual knew what they were doing as they didn't want any bad press due to purchaser mess ups.
 
you may be right , the fact is that I like facts and évidences , and I did'nt see any so far , it's up to them to show us somes :mrgreen:
 
I think the main barrier with the Yasa motor is the price. IIRC it was circa £5k when a friend made enquiries a year ago.
 
Punx0r said:
I think the main barrier with the Yasa motor is the price. IIRC it was circa £5k when a friend made enquiries a year ago.
Click to expand...

I don't understand why the EV community expects to be able to buy the latest technology for peanuts.

If this was an ICE forum, would we be complaining about a McLaren engine costing $5k??
 
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