Transverse Flux Motor topology

[eP]

http://www.eocycle.com/EN/technology/ICEM2006 PAPER412 DUBOIS.pdf
What you guys think about it ?

If you what find more so type in google: transverse flux.

 

[Drunkskunk]

interesting. But i don't realy see what the advantage is. a conventional brushless motor can already aproach the efficancy of its coper windings, so there isn't much room for improvement there. maybe torque?

But using Silicon and SMC, what ever that actualy is, in place of Iron in the core would only cause it to need more watts to produce torque, and result in higher over all losses.

Maybe its a power density thing? low efficancy but high output? there are plenty of applications for small, high power motors running short duty cycles were efficancy isn't much of a concern.

 

[Miles]

Ref: http://books.google.co.uk/books?id=u_NiSnZeLQQC&pg=PA379&lpg=PA379&dq=transverse+flux+motors&source=web&ots=ipQYuIxWqV&sig=d8ns9nAB5cfOihC80-yPIlFfStw&hl=en&sa=X&oi=book_result&resnum=3&ct=result

 

[Miles]

http://www.appliancedesign.com/CDA/Articles/Motors/BNP_GUID_9-5-2006_A_10000000000000078938

 

[Miles]

http://www.awstechnology.dk/7.htm

 

[eP]

http://www.appliancedesign.com/CDA/Articles/Motors/BNP_GUID_9-5-2006_A_10000000000000078938

The transverse flux motor is an emerging motor technology that should be closely watched by appliance designers because it offers many design features that allow for extremely efficient manufacturing techniques (i.e. powdered metals), excellent material utilization, and the promise of high motor efficiencies.

 

[Miles]

http://www.awstechnology.dk/7.htm

The potential of the ETFM is very interesting, because the new mechanical design makes it possible to integrate the ETFM in applications, where the axial length of the machine must be short. An example is the indoor cycle, eTenzor, developed by AWS Technology. The ETFM, with integrated gearbox, is placed directly between the pedals, which make the design homogeneous.

 

[eP]

http://www.awstechnology.dk/7.htm

The winding scheme as above is not what i'm looking for.
Transverse machines allow for much more efficient winding scheme than that.

Attachment source document once again:
http://www.eocycle.com/EN/technology/ICEM2006 PAPER412 DUBOIS.pdf

 

[spinningmagnets]

This thread was started in 2008, but...why start new one?

Hoganas has been working on transverse flux for a while, in combination with stator sections made from "Somaloy" powdered metal (which allows for ultra-high RPMs with extremely low eddy current heat). Hoganas is actually in production now and making direct drive hubmotors for Ohm in Canada and Matra in France (the M750).

Here is a graphic of a two-stator inrunner Transverse-Flux, but the Hoganas is actually a three-stator outrunner, however...it appears they are using this topography for their motor (the closest representation I could find):

Here is a graphic that looks more exact in the way a single stator of the Hoganas motor is configured, permanent magnets on an outrunner rim (facing inwards, of course), a single loop of wire (with several wraps) inline with the wheel, which energizes stator projections on either side of the loop.

_________________________________________________________________

I've been Googling "transverse flux", and a new company showed up. ETM/Electronic Torque Machines is promoting a TFM for scooters.

http://etmpower.com/e-scooters/

Diameter (magnetics), mm 210
Width (magnetics), mm 65
Weight (magnetics), kg 8.9
R (line-line), mΩ 40
Peak Torque, Nm 67
Stall Torque (continuous), Nm 39
Peak Power, Watts 2800
Continuous Power, Watts 1400
Kt, N-m/Arms 1.33
Voltage 50V (amps, 28A cont, 56A peak?)

 

[Miles]

See also: http://endless-sphere.com/forums/viewtopic.php?f=30&t=23109

 

[Miles]

On The Design And Construction Of Modulated Pole Machines - Edwin Pinguey

This is a great introduction to the subject......

 

[Punx0r]

Looks a doddle to wind. Poor fill factor, though