Results 321 to 330 of about 60,784 (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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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 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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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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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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Study on Permanent Magnet Demagnetization Characteristics in Permanent Magnet Synchronous Machines
Advanced Materials Research, 2011When Permanent Magnet Synchronous Machines (PMSM) working with rated load or overload, stator iron loss and copper loss, bearings friction loss, permanent magnet (PM) eddy-current all will cause PM temperature rise. In this condition, the PM is affected by the temperature and the stator of the reverse magnetic field generated prone to arouse ...
Ji Zhu Liu +3 more
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Interior permanent magnet machines with rare earth and ferrite permanent magnets
2017 IEEE International Electric Machines and Drives Conference (IEMDC), 2017This paper proposes a novel interior permanent magnet machine (IPMM) design in which the rotor employs U-shape magnet cavities filled with both rare earth and ferrite permanent magnets (PMs). The design aims to replace a portion of rare earth PM materials by ferrite magnets in order to minimize the material cost.
Zhentao S. Du, Thomas A. Lipo
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Effect of Side Permanent Magnets for Reluctance Interior Permanent Magnet Machines
2007 IEEE Power Electronics Specialists Conference, 2007A traditional electric machine uses two dimensional magnetic flux paths in its rotor. This paper presents the development work on the utilization of the third dimension of a rotor. As an example, the air gap flux of a radial gap interior permanent magnet motor can be significantly enhanced by additional permanent magnets (PM) mounted at the sides of ...
J. S. Hsu +5 more
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2014 17th International Conference on Electrical Machines and Systems (ICEMS), 2014
A comparative study between the novel biased flux permanent magnet machine (BFPMM) and the doubly salient permanent magnet machine (DSPMM) with the same machine size is presented in this paper. The choice of rotor pole number in BFPMM can be any integers except the phase number and its multiples, which is more flexible than that in DSPMM.
J. T. Shi, Z. Q. Zhu, D. Wu, X. Liu
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A comparative study between the novel biased flux permanent magnet machine (BFPMM) and the doubly salient permanent magnet machine (DSPMM) with the same machine size is presented in this paper. The choice of rotor pole number in BFPMM can be any integers except the phase number and its multiples, which is more flexible than that in DSPMM.
J. T. Shi, Z. Q. Zhu, D. Wu, X. Liu
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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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