Results 211 to 220 of about 2,899 (264)

Permanent Magnet Machines

1991
Permanent magnet excited machines have always featured strongly in the application of magnets, and forecasts indicate that they will continue to do so. Compared to other machine formats, such as those based on induction or switched reluctance principles, permanent magnet excited types provide considerable flexibility in design, and many different ...
D. Howe, T. S. Birch
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On the Speed Limits of Permanent-Magnet Machines

IEEE Transactions on Industrial Electronics, 2010
Permanent-magnet (PM) machines are considered the most suitable machine type for very high speed applications. Still, due to the growing demand for the ever higher rotational speeds, PM machines are approaching their limits. The focus of this paper is the different factors that lie behind the inherent speed limitations of PM machines.
Aleksandar Borisavljevic, Henk Polinder, Jan Abraham Ferreira   +2 more
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Permanent Magnet Machines

1995
In permanent magnet excited rotating field machines the structure is broadly the same as the synchronous machine, i.e. there is a stator with the symmetrical three phase winding system and a rotor, which in this case has a permanent magnet instead of the excitation winding.
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Pole-changing permanent-magnet machines

IEEE Transactions on Industry Applications, 2002
Electric drives in which discrete speed control is required are today equipped exclusively with squirrel-cage induction motors, due to the property of the squirrel cage to always have the same number of poles as the stator winding. Conventional permanent-magnet (PM) machines have a constant number of poles and can be operated from a constant frequency ...
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Flux Guides for Permanent-Magnet Machines

IEEE Power Engineering Review, 2001
A study for the enhancement of effective flux of permanent magnet (PM) machines using flux guides is presented. An intrinsic demagnetization curve that considers the leakage flux is introduced. On the basis of a higher effective flux the stator winding can be more compact; consequently, a lighter stator and a higher efficiency PM machine can be ...
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Permanent Magnet Machine Optimization

2003
The paper presents electrical machine design considerations introduced by exploiting new magnetic material characteristics. The materials considered are amorphous alloy ribbons as well as Neodymium alloy permanent magnets involving very low eddy current losses.
Georgios D. Kalokiris, Antonios G. Kladas, John A. Tegopoulos   +2 more
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Dynamic Permanent Magnet Flux Estimation of Permanent Magnet Synchronous Machines

IEEE Transactions on Applied Superconductivity, 2010
This paper deals with rotor flux estimation in permanent magnet synchronous motor(PMSM). In most application, the rotor flux linkage is treated as a known constant. However a high operation temperature or a stator winding current impulse may cause magnet flux ripple or demagnetization which has direct impact on machines performance.
null Xi Xiao, null Changming Chen, null Meng Zhang   +2 more
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Permanent-Magnet Machines

2015
Being fueled by continual development of permanent-magnet (PM) materials and machine structures, PM machines are becoming attractive for a wide range of applications. In this article, the magnet-materials that have been used for PM machines are first introduced. Then, the classification of various PM machines is discussed.
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Permanent magnet synchronous machines

1983
These Ecole polytechnique federale de Lausanne EPFL, n° 443 (1982)Laboratoire d'actionneurs integres Reference doi:10.5075/epfl-thesis-443Print copy in library catalog Record created on 2005-03-16, modified on 2017-05 ...
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A Review of Thermal Monitoring Techniques for Radial Permanent Magnet Machines

Machines, 2022
Pinjia Zhang
exaly