Results 191 to 200 of about 836 (238)
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Permanent magnetic excitation of rotating and linear synchronous machines
Journal of Magnetism and Magnetic Materials, 1978Abstract Selected controlled permanent magnet arrangements for active guideway linear synchronous propulsion with integrated magnetic levitation and guidance are presented. A comparison between permanent magnet and dc excited magnet control characteristics is given.
H. Weh, H. May
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Linear permanent magnet synchronous machine for high acceleration applications
2017 IEEE International Electric Machines and Drives Conference (IEMDC), 2017In this work, a linear permanent magnet machine design is presented for applications that require high acceleration. This design uses aluminum as a supporting material for the moving secondary to reduce mass. Force production is maintained through the use of a quasi-Halbach array of permanent magnets. Aluminum, however, is conductive and the additional
William R. Jensen +2 more
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Direct and quadrature inductances measurement of the permanent magnetic linear synchronous machines
Energy Conversion and Management, 2011Permanent magnetic linear synchronous machines (PMLSMs) are playing a more important role either in transportation systems or magnetic launch systems, for the excellent advantages. It is indispensable to high performance controllers that some machine parameters are known such as the direct axis (d-axis) and quadrature axis (q-axis) inductances. In this
Liyi Li +4 more
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Characteristics of a disc permanent magnet linear synchronous machine with back iron
IEEE Transactions on Magnetics, 2000A disc permanent magnet linear synchronous machine (DPMLSM) with back iron is presented in this paper. The proposed machine is to fulfil the requirements of high efficiency and large torque for electric vehicle (EV) applications. The back iron plays an important role in enhancing flux linkage and reducing flux leakage so that the designed machine has ...
null Cheng-Tsung Liu +2 more
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IEEE Transactions on Magnetics, 2015
A kind of arc-linear permanent-magnet synchronous machine (AL-PMSM) used for scanning system, which requires high positioning accuracy, high response performance, and wide scanning range, is proposed and researched. Due to the finite length of stator core and rotor core, the AL-PMSM suffers from stator end effect and rotor end effect.
Jing Zhao +4 more
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A kind of arc-linear permanent-magnet synchronous machine (AL-PMSM) used for scanning system, which requires high positioning accuracy, high response performance, and wide scanning range, is proposed and researched. Due to the finite length of stator core and rotor core, the AL-PMSM suffers from stator end effect and rotor end effect.
Jing Zhao +4 more
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Design and dynamic analysis of permanent magnet linear synchronous machine for servoapplication
Journal of Applied Physics, 2006In servosystem demanding precision dynamic characteristics, application of the permanent magnet linear synchronous machines (PMLSMs) has an advantage of analysis convenience by simple geometry and thrust ripple reduction from the sinusoidal back electromotive force and excited stator.
Seok-Myeong Jang +3 more
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Investigation on an arc-linear axial flux permanent-magnet synchronous machine
2017 20th International Conference on Electrical Machines and Systems (ICEMS), 2017A kind of arc-linear axial flux permanent-magnet synchronous machine (AL-AF-PMSM) used for scanning system is researched in this paper. Due to the characteristics of the three-dimensional (3-D) magnetic field, 3-D finite element method (FEM) is usually required to analyze the AF-PMSM. However, 3-D FEM is generally too time consuming.
Jing Zhao +5 more
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Analytical modeling of a new disc permanent magnet linear synchronous machine for electric vehicles
IEEE Transactions on Magnetics, 1999This paper develops an analytical approach based on a qd0 reference frame model to analyze dynamic and steady state characteristics of disc permanent magnet linear synchronous machines (DPMLSMs). The established compact mathematical model can be more easily employed to analyze the system behavior and to design the controller. Superiority in operational
null Cheng-Tsung Liu +2 more
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Fault-Tolerance Performance Analysis of a Five-Phase Permanent-Magnet Linear Synchronous Machine
IEEE Transactions on Magnetics, 2021A fault-tolerance control strategy based on the constant magnetomotive force (MMF) is proposed for a five-phase permanent-magnet linear synchronous machine (FP-PMLSM) under one-phase fault condition in this article, which aims to keep steady operation during a short time.
Qian Jiang +3 more
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Design of a disc permanent magnet linear synchronous machine for electric vehicle application
2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002This paper presents a new disc permanent magnet linear synchronous machine (DPMLSM) for application to electric vehicles. The windings and permanent magnets of the proposed machine are well-arranged to fulfil requirements of large torque density and high efficiency for electric vehicle application.
null Cheng-Tsung Liu, null Jyh-Wei Chen
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