Results 321 to 330 of about 59,954 (356)
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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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Unbalanced Magnetic Pull in Permanent Magnet Machines
7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014), 2014The paper studies the unbalanced magnetic force due to rotor eccentricity in permanent magnet machines. An analytical technique is presented for predicting the magnetic field distribution in a non-uniform airgap and the resulting unbalanced magnetic pull caused by eccentricities. The method is based on a simple modification of a 2D analytical technique
M. Michon +3 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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Dynamic simulation of permanent magnet synchronous machine
Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), 2004Electric drive is increasingly gaining in importance within the general ship propulsion system. Contemporary electric propulsion mainly contains a fixed propeller, a synchronous or asynchronous propulsion engine and PWM frequency converter with an adequate drive.
Jurić, Zdeslav +2 more
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Permanent Magnet Machines: Asychronous Operation
IEEE Transactions on Power Apparatus and Systems, 1980The permanent magnet motor operating at subsynchronous speeds, as during run-up, is treated with particular emphasis placed on the role that magnet excitation plays. The torque, during run-up, is separated into components called the "cage torque", the "magnet torque" and pulsating components of double-slip-frequency and single-slip-frequency. Equations
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High-Power-Factor Vernier Permanent-Magnet Machines
IEEE Transactions on Industry Applications, 2013Vernier permanent-magnet (VPM) machines are well known for high torque density but low power factor. This paper deals with the low power factor of VPM machines. The goal is not obtained by reducing the electrical loading or adjusting current advance angle but by proposing a novel vernier topology, i.e., a dual-stator spoke-array (DSSA) VPM topology. In
Dawei Li, Ronghai Qu, Thomas Lipo
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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.
openaire +2 more sources
Current treatment and future directions in the management of anal cancer
Ca-A Cancer Journal for Clinicians, 2022Leila T Tchelebi +2 more
exaly