[rishimaze]

I'd call you a lot of things before either of those terms based on the way you interact with people here. Rude, impulsive, attention deprived... But then I also need to recognise that as part of an inclusive society we have to accept that some people don't have awareness of or control over their behavior.

Good job 57Chevy! Totally agree about Remi!

Well remi_martin, he NAILED you to the wall...Mr. Arrogant Industry Veteran! Nice to see I'm not the first person to tell you that you suck!

 

[rishimaze]

That's sounds like a normal alternator - with the cheap-to-build claw rotor configuration excited through brushes and slip rings - but with the axial coil stationary. The magnetic coupling of the stationary rotor winding with the movig claws around it would be terrible, but apparently Delco Remy offers that. The rotor is supported and driven from one end, and the winding is supported and held non-rotating within it from the other end.

The traditional configuration with separate excitation power transfer coils may only be used on larger machines.

Wait what? Did I read that right? Did you say the armature has a fixed winding in it? So does the actual armature spin around this fix winding and the fixed winding is inducing a magnetic field onto the armature...so "sort of reluctance"? Slip rings and brushes do suck and however this works with a fixed coil inside the armature (if I have that right) would probably be much more efficient.

 

[rishimaze]

The ones I have seen are much simpler, just a stationary coil of wire inside the spinning claws, rather than a spinning coil of wire as part of the claws.

Can you guys show any diagrams of these magical motors. They sound fascinating!

 

[rishimaze]

Not true
View attachment 127712

Agreed...a 3 jaw puller makes extraction and insertion very controllable. Never crashed a motor yet!

C80100:

Hub motor with 65mm x 180mm stator:

Hub motor with a 65mm x 165mm stator:

Motenergy Axial flux, dual stator 3031-001 with 7" x 2" stators.

3031-001 next to a 120mm x 90mm outrunner. It's BIG!

 

[rishimaze]

Yes, I had not heard of it before this thread, but that's what 57Chevy described and that appears to be the design of the BorgWarner unit as shown in the YouTube video attached to their product web page. The magnetic coupling between the fixed winding and the rotor surrounding it is radially through the cylindrical area at the open end of the cup-shaped rotor, and axially through the other end. That's a magnetic flux path, with as low reluctance (the magnetic equivalence to resistance) as they could manage.

This is kind of interesting...I wonder if there is a weight savings? I'd assume the armature windings are wound onto laminates. I'm betting this motor has multiple internal windings so it can essentially make several magnet poles with them. They probably rotate with the actual armature.