EMRAX Similar to a brushless AGNI motor

[c_a]

Does anybody know a small controller to run this motor at a peak power of 40kw?

I really like to use it in my www.epo-bike.de in 2012, but the controllers are to heavy :-(

 

[jonescg]

It's an outrunner:

Hello Chris,
- Yes it is.
- These motors are opened now (cooling holes) especially for aircooled motors. We also make LC motors, which are opened too, but in near future we are planning to make total encolosed motor, which will have some additional improvements inside the stator and will be cooled only with water. - 5,6kg controller I remaide it for my glider plane, so this was prototype only for my glider plane.
Best regards,
Roman

ENSTROJ
Sušnik Roman s.p.
Pod hribom 4, 1235 Radomlje
Slovenia, EUROPE
phone: 0038641 966 065
enstroj@siol.net
www.enstroj.si

From: Christopher Jones
Sent: Wednesday, July 13, 2011 10:41 AM
To: Enstroj
Subject: RE: EMRAX motor for TTX-GP bike

Hi Roman,
It just occurred to me that the entire outside of the motor is the part that spins, correct? That would explain the good air cooling! However, this is also rather dangerous for an electric motorbike as it will need to be completely enclosed for safety reasons. The enclosure will need to be build from something fairly solid in the event of a crash, it might damage the rotor.
Also, what voltage / power output was the 5.6 kg Piktronic controller capable of? It looks like an OK size, but two or three of these could be difficult.
Cheers,
CHRIS

 

[Nuts&Volts]

well ill be damned, my apologize for my worthless rants. Thanks for correcting me

 

[jonescg]

Yeah well, at least we found out now and not after we just bought four of them I wonder what the enclosed motor will look like... Still, can't beat that power to weight ratio...

 

[Nuts&Volts]

agreed, 80kW and 12kg is mind blowingly awesome

I have a single agni right now on my street bike. I am hoping to either upgrade to one of these or two colossus next summer, but the controller for either will be an issue. The colossus at a low voltage (<150) is a little easier to source at least, ie kelly

 

[c_a]

Does anybody know a controller to power this motor with ~50kW peak?

Thanks!
Christian

 

[jonescg]

There are about 4 or 5 controllers that will do the job, but like all AC motors, they are huge and heavy. PicTronik are their favourite controller for the job, but the closes you will get to a light weight option would br the WaveSculptor200 from Tritium in Australia. And it's 8.5 kg, good for 100 kW.

 

[c_a]

The piktronik is 13kg heavy, the tritium is a bit oversized, but ok.

Have you seen the price? Around 4530€ oooohhhoooo

I want a controller for ~2000€ with 50kW peak and a weight of 4-5kg...

 

[Timmey]

You might try the Unitek BAMOCAR-D3

http://www.unitek-online.com/produkte/batterie/bamocar_d3.html

http://unitek-online.com/pdf/download/Antriebe-Drive/BAMOCAR/E-BAMOCAR-D3.pdf

weight around 5.8-6.8 kg according to datasheet.

 

[jonescg]

Those UniTeks look pretty darn good actually. Right size and weight too. And now the price! ...Don't know, but sure to be a lot.

 

[Nuts&amp;Volts]

From the price sheet that I got from Roman back in February

"We research also the UNITEK GmbH controller
http://www.unitek-online.de/pdf/download/Antriebe-Drive/BAMO/BAMO-D3.pdf
which price is 3.300,00 euros (orders – direct to Unitek or to Enstroj)"

Also for those interested

"Prices for water cooled Piktronik controller SAC 41 is: 3.690,00 euros (orders direct to Piktronik or to Enstroj)"

 

[c_a]

No answer from unitek yet. :-(

 

[Benoit_Ferran]

Hi, I am using this EMRAX motor with an liquid-cooled controller from Piktronik (SAC 50) but I'm dealing with some serious problems of cooling since the temperature limitation is 40°C. Does anyone have an idea of what type/model of heat exchanger I have to use ?
Thanks,

Benoît

 

[Arlo1]

What's the actual motor prices? Edit sorry guys I found them. Wow not cheep

 

[Nuts&amp;Volts]

What's the actual motor prices? Edit sorry guys I found them. Wow not cheep

Compared to what? They are very cheap if you look at a YASA or Evo motor which both have lower power/weight and than the EMRAX. It cost our team $4500 to get the EMRAX to our door. YASA was over X3 the cost and EVO was over X2 the cost just for reference.

 

[Arlo1]

What's the actual motor prices? Edit sorry guys I found them. Wow not cheep

Compared to what? They are very cheap if you look at a YASA or Evo motor which both have lower power/weight and than the EMRAX. It cost our team $4500 to get the EMRAX to our door. YASA was over X3 the cost and EVO was over X2 the cost just for reference.

Compared to an ICE that makes 40kw continious. LOL. Thing is there is not a lot to a BLDC motor once the design is done so a few years and these should be cheep otherwise I will make my own!

 

[jonescg]

I think these motors are perfect for small aeroplanes, boats and anything with low startup torque. Base on what I can see, I don't know if they will be very good at dissipating heat. Seems high spinning speeds are needed to get good airflow, and combined with water cooling it should be OK... Kyle, you are our guinea pig!

 

[Nuts&amp;Volts]

I think these motors are perfect for small aeroplanes, boats and anything with low startup torque. Base on what I can see, I don't know if they will be very good at dissipating heat. Seems high spinning speeds are needed to get good airflow, and combined with water cooling it should be OK... Kyle, you are our guinea pig!

Yes I am indeed. We got in spinning with the Tritium, took about an hour to actually setup and about 8hrs troubleshooting phase wiring and some connections. Still need to troubleshoot the Temp sensor, but that shouldn't take too long.
http://www.youtube.com/watch?v=sEYrgT6u9pg

 

[Farfle]

Is it an outrunner?

 

[Arlo1]

They list it as Axial here http://www.enstroj.si/Electric-products/emrax-motors.html

 

[Nuts&amp;Volts]

Yep its axial flux dual rotor outrunner with surface mount PM magnets setup as a halbach array.

 

[dangerzone]

Yep its axial flux dual rotor outrunner with surface mount PM magnets setup as a halbach array.

Any idea what kind of halbach array does it have..? It would be nice to take a peek and see what's inside this motor...

 

[Nuts&amp;Volts]

Yep its axial flux dual rotor outrunner with surface mount PM magnets setup as a halbach array.

Any idea what kind of halbach array does it have..? It would be nice to take a peek and see what's inside this motor...

Well, we aren't going to open it...yet I didn't realize there were types of halbach arrays. I know that there is 10 pole pairs in the axial direction, but their are slots for 20 magnets on each rotor (appear to be bar magnets based on the shape of the rotor backplates). There is no magnetic field on the outside of the rotor backplates...

 

[jaz1902]

What became of this axial flux Halbach array thread... ?Looked like a vigorous start