permanent magnets

Articles About permanent magnets


Articles are sorted by RELEVANCE. Sort by Date.

1 High-Tech Motors Evolving from PM Muck (September 2014)

University lab's motor eliminates pricey rare-earth magnets.

2 Achieving High Electric Motor Efficiency (April 2012)

The use of motor structures which can concentrate magnetic flux allows ferrite PM motors to achieve performance and power densities that approach those of PM motors using rare earth magnets, but without the cost penalties and supply source concerns of rare earth magnets.

3 Book Review: Design of Permanent-Magnet Brushless Machines (October 2010)

The latest offering by machine design experts J.R. Hendershot and T.J.E. Miller is an 822-page brushless permanent-magnet (PM) machine design book that serves as a worthy follow-up to their 1994 work.

4 Brushless PM-Motors Speed Ahead (June 2014)

There are more brushless PM motors being made every day. These brushless PM motors are smaller in size -- i.e., less than 50 watts in power output found in hard-disk drives, CD and DVD players and many portable medical devices. Servo systems with brushless PM motors ranging from 50 watts to 50 kilowatts are now challenging the larger electric motor applications. A few manufacturers have pushed brushless PM motors above 200 kW.