I have the Rainbow with the brushless motor, as well as a Dyson DC22 Motorhead with their take on the SR motor. I guess what I mean is I'd like pics, I want to see how its set up and such, as this is the first time i've heard of them using one of these motors. I tried finding details about it on their site, but they don't really say much about the motor other than how powerful it is.
I would agree that these are the future of suction motors in vacuum cleaners. I don't know about PN or brush roll drive motors though, SR motors have far less torque than a universal (brushed motor) of the same size will, so unless they take advantage of gear reduction and a higher speed SR motor, I don't see them completely replacing brushed motors. The reason they don't have the torque is because there are no magnets on the rotor, I don't know that this would work, but I wonder if putting permanent magnets on the rotor of an SR motor would solve this issue, but there's probably some technical reason why not.
