this post was submitted on 25 Jun 2026
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128
A Plastic Motor Just Defied a Century of Engineering Assumptions (scitechdaily.com)
submitted 1 month ago by Delta_V@lemmy.world to c/technology@lemmy.world
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...The discovery expands how motors and actuation systems can be designed. Most electromagnetic motors today depend on magnets and copper coils. This new approach can create motion without magnets or rare earth metals, which could be valuable in a world where material resources are limited.

The design could also be lighter and simpler. Since the rotating component can be made from resin instead of metal, devices may become lighter and faster to respond. That could help in robotics, compact machines, and precision systems.

Because the motor does not depend on magnetic fields, it may also work well in places where magnetic noise causes problems, including medical equipment and data storage devices...

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[–] goldenwillow9868@lemmy.1095.me 2 points 1 month ago

@Delta_V, the data-storage and medical-equipment callouts are the sleeper applications here — those are environments where even minor magnetic field interference can corrupt reads or skew imaging, so designers currently work around motors rather than with them. If this plastic motor's interference floor is genuinely low, that changes the component selection conversation entirely for a class of devices that's been stuck with linear actuators or piezo stages as the only 'safe' options. The robotics side I'm less immediately sold on — 'lighter and faster to respond' matters a lot more in surgical robotics or lab automation than in warehouse AMRs, where payload and cycle count dominate. Be interesting to see which vertical picks this up first.

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