Results 301 to 310 of about 344,639 (341)

Field-weakening performance of brushless synchronous AC motor drives

IEE Proceedings - Electric Power Applications, 1994
The paper examines the theoretical and practical limitations to the field-weakening performance of surface permanent magnet, synchronous reluctance and interior permanent magnet motors when driven from an inverter with a limited volt-ampere rating. It is shown that the 'optimal' field-weakening performance consists of an infinite constant-power speed ...
W.L. Soong, T.J.E. Miller
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Motor re-rating for traction applications - field weakening revisited

IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03., 2003
The conventional wisdom in traction applications is to use machines in their field-weakening regime. Here, an alternative approach is given in which field weakening is avoided in an AC drive traction system. Instead, the motor's performance is extended through a reduced voltage re-rate procedure.
P.L. Chapman, P.T. Krein
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Linear control of DC motor drive with field weakening

2010 3rd International Symposium on Electrical and Electronics Engineering (ISEEE), 2010
This paper considers a linear control design of separately excited DC motor system (SEDCM) operated in the field weakening high speed regime. Nonlinear multiple input — multiple output (MIMO) feedback linearization is applied and a linear controller schema is proposed.
Romeo Paduraru, Emil Rosu, Marian Gaiceanu, Traian Munteanu, Teodor Dumitriu, Cristinel Dache   +5 more
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High performance induction motor drive in field weakening region

2015 International Conference on Control Communication & Computing India (ICCC), 2015
Induction motor field weakening control which maximizes the power factor and output torque capability in steady state and transient condition is presented in this paper. By considering both voltage limit and current limit of the system, the optimal torque equation can be obtained in the field weakening region.
null Aswathy M S, M Waheeda Beevi
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Coulomb Potential Weakened by Self-Field of Electron

Journal of the Physical Society of Japan, 1992
Self-field method suggested by the present author in the previous work is applied to the electron in the Coulomb potential. Effectively weakened Coulomb potential are found due to the self-field of the electron. The form of the weakened Coulomb potential between two electrons is U ( r )=( e 2 /4π r )[1- exp(- r /2 R c ) cos( r /2 R c )].
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Field weakening implementation in AC induction machine predictive control

2011 IEEE Ninth International Conference on Power Electronics and Drive Systems, 2011
AC induction motors become very popular for motion control applications due to their simple and reliable construction. Control of drives based on AC induction motors is a quite complex task. In most high-performance applications classical vector control is currently used.
Pavel Vaclavek, Petr Blaha
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Field weakening performance of a linear brushless AC machine

IEEE Transactions on Magnetics, 1996
The use of field weakening in the control of linear brushless AC machines is investigated using finite element modelling and is shown to be viable. The results are validated using a practical machine.
J.S. Moghani, J.F. Eastham
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Consequent pole permanent magnet machine with field weakening capability

IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485), 2002
The electromagnetic design procedure and laboratory test results are presented in this paper for a consequent pole permanent machine (CPPM) with field weakening capability. Due to its particular configuration, the CPPM allows one to easily control the air-gap flux in a wide range so that the speed range of the machine is increased.
J.A. Tapia, F. Leonardi, T.A. Lipo
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Field Weakening in Buried Permanent Magnet AC Motor Drives

IEEE Transactions on Industry Applications, 1985
The usual uncoupled d - q model of salient pole synchronous machines (Park's model) may be insufficient for accurate modeling of buried magnet permanent magnet machines. The addition of a nonbilateral coupling between the direct and quadrature axis equivalent circuits is shown to improve the steady-state model greatly.
Brigette Sneyers, Donald W. Novotny, Thomas A. Lipo   +2 more
openaire   +1 more source

Mechanical Field Weakening Techniques for an Axial Flux Machine

2019 International Conference on Sustainable Energy Engineering and Application (ICSEEA), 2019
The electric machine for automotive applications should have a wide speed range. This paper describes the mechanical techniques to weaken the magnetic field of an axial flux permanent magnet machine in order to increase the machine’s speed range as well as reduce the iron losses. Three different techniques have been simulated and analyzed in this paper
Muhammad Kasim, John Fletcher
openaire   +1 more source