Can some one explain this to me? Axial Flux + 7 BrushlessESC

[VoKuS]

Can some one explain how a motor like the one in the picture below works?

How is he able to use so many brushless esc's to drive one motor?

The reason I am asking is because I have a bunch of 25 amp brushless esc's laying around, and I would love to try and build that motor in the pictures, but I am not even sure if the book he is selling, explains or covers that.

I am thinking of trying to use an axial flux motor with multiple brushless esc's, as mid drive type e bike setup.

Need your thoughts on this.


Source: http://www.evalbum.com/3318
Selling His Book Here: http://www.amazingdiyprojects.com/electric_motor.html

[Jeremy Harris]

All he's done is divided the motor up into several three phase BLDC motors and used a controller for each. In his case he's used a 21 winding configuration and 7 controllers, but the idea should work with any multiple slot BLDC winding pattern I think.

If you had, for example, a common 12 slot stator, then you could wind it as four separate three phase windings, either in star or delta, and use a separate controller for each. You would need to bring all the separate winding wires out to connect them to the controllers, but it would work OK. Each controller would be driving its set of windings independently of the others. One problem to overcome is that the controllers would each be driving low inductance, low resistance, windings, so would need a high peak current capability.

[VoKuS]

Thank you!