Featured Nissan motor analysis Munro

Discussion in 'Prius, Hybrid, EV and Alt-Fuel News' started by bwilson4web, Aug 1, 2025 at 9:32 PM.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Nissan is producing a motor using an electro-magnet rotor which eliminates the need for permanent magnets:


    The same as running an alternator as a motor, this is a brilliant solution as it also solves the problem of back-EMF that requires 'field weakening' in traditional motors. There is no free lunch as the rotor coils require power but the dynamic range of efficient power production is well worth it.

    Bob Wilson
     
    #1 bwilson4web, Aug 1, 2025 at 9:32 PM
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  2. bisco

    bisco cookie crumbler

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    does it reduce rare element usage?
     
    #2 bisco, Aug 2, 2025 at 2:39 PM
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  3. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Yes. By orders of magnitude.

    Bob Wilson
     
    #3 bwilson4web, Aug 2, 2025 at 5:57 PM
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  4. bisco

    bisco cookie crumbler

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    i wonder if they are expensive motors to build. ariya is not an inexpensive car, for what you get
     
    #4 bisco, Aug 2, 2025 at 8:58 PM
  5. T1 Terry

    T1 Terry Active Member

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    I like the rational they used, reduce the supply chain issues and make highway driving energy efficient by not needing to waste battery capacity using field weakening. As said in the video, no one really cares about town energy consumption, plenty of recharge facilities in the city, not so much out on the freeways.

    T1 Terry
     
    #5 T1 Terry, Aug 2, 2025 at 9:09 PM
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  6. bwilson4web

    bwilson4web BMW i3 and Model 3

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    It should be slightly more than an induction but significantly less expensive than a PM.

    The carbon slip rings are a wear item but having a pair of brushes for each should help. Efficiency TBD but should be on par with a quality induction motor.

    Munro makes money selling their tear-down reports. Perhaps call them Monday?

    Bob Wilson
     
    #6 bwilson4web, Aug 3, 2025 at 6:48 PM
  7. Isaac Zachary

    Isaac Zachary Senior Member

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    I'm not sure what field weekening is, but Tesla and Toyota both use a type of motor that changes from PM (low end torque) to reluctance (high end power) by changing the phase angle in relation to the rotor.
     
    #7 Isaac Zachary, Aug 3, 2025 at 8:55 PM
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  8. Gokhan

    Gokhan Senior Member

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    So, then, it will require replacement every three years/30,000 miles like alternators. It sounds like typical Nissan reliability. LOL
     
    #8 Gokhan, Aug 4, 2025 at 7:36 AM
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  9. bwilson4web

    bwilson4web BMW i3 and Model 3

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    As long as they easily replaced, like tires and wipers, a nit.

    Bob Wilson
     
    #9 bwilson4web, Aug 4, 2025 at 1:12 PM
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