Yeah the csiro motors are Ironless axial motors. Great development and IMO it's only the "in-between-results", on load and without load is there room for any improvement. To build takes 40 hours to wind.
Those specs are going to be difficult to achieve on a normal bike in any case due to wind resistances, with the Iron motor one could expect some losses on say an MP due to the iron losses and stray EM with eddy currents.
The beauty with the axial designs is they make most of the projected EM from the core and work on a semi toroid effect around the stator to increase inductance per wind , this decreases the EM foot print allowing sharp focus upon the permanent-magent rings on either sides of the stator.
IMO is youre using ceramic, an interesting idea to play with is to use an Iron powderd core, semi iron cores, even a fairy sprinkle of iron will increase inductance, anything that can gain reactance will allow one to decrease winding resistance further, hopfully without losing too much in the core, this just may sqeeze a little more out of the axial designs for the mainstream legal bike motor market. Required voltages over 48v are not desirable so lowering winding resistance and getting as much reactance/voltage/resistance is crucial.
The CSRIO motors measured up to 95-98% efficiency. This was aided by a very low resistance over the controller fets and careful PWM current limiting control, ommiting shunts where possible, ultra low mechanical resistance and very good aero dynamics wheel and tire designs.. The less mechanical and external resistance one can place upon a motor, the better the all round results. Even the weight of the motor chasis, and spokes reaction to wind resistance will lose you some points on efficiency in some tests.
Now with the speed 1200 watts @ 120 km/h, A man can peddal a bike @ 130kph, and reason this is, is the bike has extremely good aero dynamics.
That said, an MP probably with the right voltages and most importantly on the right bike and controller could push that speed using + 10%-15% power. Maybe even 1500-1600 watts.
http://www.youtube.com/watch?v=jQwpGLCAMm4&feature=fvwrelIf that guy can pedal 132 kph imagine if he had some high voltage motor assistance?
Anyway nice challenge, and I think if anyone can make these designs available to the mainstream it will be the chinese.
BTW GM already have a pancake motor. Havent been here for a year now so I'm not sure if the still have them available. Not sure about it's performances.
A tweaked, software current controlled, no shunt , high voltage, with a larger low internal restance LI battery may just get you up to 90% effieciency. That's getting closer.
