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Low Weight – High Torque Motors for Commercial Drones

Lowell Christensen,  Consultant • Lowell Christensen LLC

We have heard of the desire to make home deliveries using commercial drones. There are several logistic issues with drone deliveries. These issues will soon be overcome and commercial delivery drones will be a fast growing application. This will require changes in motor design to meet the requirement for high torque in a low weight motor. MORE

Extending the Limits of the Sm2Co17 System

By Steve Constantinides  | Arnold Magnetic Technologies

The 2010-2011 rare earth crisis appears over. Prices are low and adequate raw material is available. Many of the efforts initiated to find a better non-rare earth permanent magnet have ended in disappointment. Programs such as Fe-nitride, core-shell exchange coupled magnets and enhanced alnico are continuing but with limited success to-date and significant hurdles remaining. It is in this framework that revisiting one of the more significant magnet materials seems a reasonable proposition. What material, you ask? Well, the strongest permanent magnet material at and above 150°C, the one with excellent corrosion resistance and superior temperature stability – Sm2Co17. MORE

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