Featured Awesome axial flux motor

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by bwilson4web, May 20, 2026 at 7:00 PM.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Finally a video showing that axial flux motors serpentine the magnetic field between the external magnetic rotors … offset between the magnetic field conductive material pads that are not permanent magnets. Truly brilliant design.

    Bob Wilson
     
    #1 bwilson4web, May 20, 2026 at 7:00 PM
  2. austingreen

    austingreen Senior Member

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    What is cost and efficiency versus say the switched reluctance motors?
     
    #2 austingreen, May 21, 2026 at 12:23 PM
  3. bisco

    bisco cookie crumbler

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    does it cut down on rare earth's?
     
    #3 bisco, May 21, 2026 at 1:41 PM
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Back if envelope, 1/3d material and closer to 99%.

    Although the magnetic conductivity material was not described, I suspect little to no expensive rare earths.

    This is the best motor architecture since induction motors. Perfect for aviation.

    Bob Wilson
     
    #4 bwilson4web, May 21, 2026 at 2:08 PM
    bisco likes this.
  5. austingreen

    austingreen Senior Member

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    Couldn't find any information but seeing as it is oil cooled itis doubtful that it is 99%, there is friction and heat from exciting the motor. The switched relcutance tesla motor has peak efficiency of 97% over a large rpm range. YASA seems to be saying lhigher power density in terms of power to weight and power to size, means it is more efficent as a system. That maybe. It currently is only going into super cars, which looks like maybe high costs, but perhaps low volumes and if volumes come then costs could come down. Would love some more information. Seems like a good choice for a motorcycle hub motor if costs can come down.


    YASA says it uses less magnetic material than PM, but this is similar to claims by most hybrid motors like the switched reluctance.
     
    #5 austingreen, May 21, 2026 at 7:10 PM
  6. Isaac Zachary

    Isaac Zachary Senior Member

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    Axial flux motors can be made with or without permanent magnets.

    If you want to get rid of the rare earth magnetic material you need either excited field-rotor motors (serial, shunt, etc), induction motors, or pure reluctance motors. Of those reluctance motors are the most efficient but would likely need a transmission and multiple gears. The permanent-magnet-reluctance motors used in Teslas and Toyota hybrids (and perhaps others) have the advantage of having good torque over a large RPM range.
     
    #6 Isaac Zachary, May 21, 2026 at 7:45 PM
  7. bwilson4web

    bwilson4web BMW i3 and Model 3

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    A three disc system, the stator is in the middle with the outer two, magnetic field puck discs on either side that rotate.

    The each stator field goes out into the nearest puck, bridges the gap to the front and following puck edges and dives back from those adjacent pucks into the other pole ends of the stator completing the magnetic loop.

    Missing are laminations which means energy wasting eddy currents are gone or greatly reduced. As for oil cooling, it is for the stator winding, ohmic heating and they use thick bar windings. No measurable eddy current heating.

    This is truly an amazing motor for light weight, high power, and high efficiency. Best of all, it scales!

    Bob Wilson
     
    #7 bwilson4web, May 22, 2026 at 12:57 PM
  8. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    Nice concept. But who has licensed it? No press releases on their web site. Capacity of producing 25k units per year?

    An idea/patent is proven good when it is making $$$$.
     
    #8 mikefocke, May 22, 2026 at 1:38 PM
  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    My understanding is Mercedes owns them. The video has more details.

    Bob Wilson
     
    #9 bwilson4web, May 22, 2026 at 2:07 PM
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