Results 211 to 220 of about 2,829 (264)
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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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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, 2010Permanent-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 +2 more
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Flat Magnets in Surface-Mounted Permanent Magnet Machines
2008 IEEE Industry Applications Society Annual Meeting, 2008The influence of flat magnets (FM) in surface- mounted permanent magnet machines (PMM) is analyzed taking the conventional single curved magnet (SCM) configuration as reference. The flat shape of magnets and the air gap between them increase the magnetic circuit reluctance and distort air gap flux density. As a consequence, the back electromotive force
Imanol Egaña +4 more
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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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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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Flux Guides for Permanent-Magnet Machines
IEEE Power Engineering Review, 2001A 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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Pole-changing permanent-magnet machines
IEEE Transactions on Industry Applications, 2002Electric 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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Permanent Magnet Machine Optimization
2003The 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 +2 more
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Permanent magnet synchronous machines
1983These 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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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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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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Magnetic Direction Analysis of Permanent Magnet in a Permanent Magnet Synchronous Machine
2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), 2022Bastian Zollet +2 more
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