Results 211 to 220 of about 59,552 (266)

AC induction machines

2010
Electrical drives are used to convert electrical energy to mechanical energy. They all use a magnetic field as the medium for energy conversion. As we will see the conversion is reversible, just as it is with hydraulic drive systems.
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Predictive control of an ac machine

2020
IV PREDICTIVE CONTROL OP AN AC MACHINE The variable speed control of ac machine, for both steady state and transient conditions, is a subject of concern for many researchers. Volt/Hertz control fullfils the requirements when the load is constant and only the steady state conditions are concerned.
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Dynamics of AC electrical machines

[1992] Record of Conference Papers Industry Applications Society 39th Annual Petroleum and Chemical Industry Conference, 1992
The concepts of natural frequency, critical speed, excitation, mechanical resonance, damping, torsional excitation, torsional critical speeds, unbalanced magnetic pull, and magnetic instability are defined and placed in context. The author seeks to encourage the use of technically justified words and phrases in the technical literature.
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Observability Property of AC Machines

2015
In many cases the implementation of control algorithms requires the knowledge of all the components of the state vector. However, because of the high cost of sensors, the reduction of the physical space inside or around the motor, the weight, or the increase of the system complexity, it is often necessary to limit the number of sensors.
Alain Glumineau, Jesús de León Morales
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Dynamical Models of AC Machines

2015
This chapter presents a detailed review of the basic concepts describing the mechanical and electrical behavior of alternative current (AC) machines, which will be used extensively in the following chapters. AC machines, specifically the permanent magnet synchronous motor (PMSM) and the induction motor (IM), will be studied.
Alain Glumineau, Jesús de León Morales
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Speed control of a doubly fed induction machine via an AC–AC converter

International Journal of System Assurance Engineering and Management, 2015
In this paper, the independent control of the doubly fed induction machine speed and stator reactive power using cycloconverter is designed and investigated. The proposed system is constituted of the doubly fed induction machine with the stator connected directly to the line grid while the rotor is connected and controlled by the cycloconverter.
Abderraouf Boumassata, Djallel Kerdoun
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Unbalanced Operations of AC Machines

IEEE Transactions on Power Apparatus and Systems, 1965
In this paper, unbalanced operations of induction and synchronous machines are discussed. The current-voltage differential equations, referred to the moving reference axes ? and s, are derived directly from the general equations of armature reaction and induced voltage.
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Practical Control of AC Machine

2020
The electric machine based on a control system with the machine model is not a simple task but requires necessary simulation tools to understand its basic operation. The complexity of their models suggests performing first simulations both in open and closed loop, without using an electric drive (VSI or DC servo stage).
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Preliminary study on AC superconducting machines

IEEE Transactions on Magnetics, 1988
Issues involved in developing AC superconducting machines are reviewed with respect to the development of a superconducting coil and the overcurrent protection system of a superconducting transformer. A 4-kVA superconducting coil using 100-A-class 50/60-Hz superconductors was made and tested.
M. Yamamoto, T. Ishigohka, T. Shimohka, N. Mizukami, M. Yamaguchi   +4 more
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Motion control with permanent-magnet AC machines

Proceedings of the IEEE, 1994
Motion control techniques have been developed to exploit the high efficiency and extremely fast dynamic response capabilities of permanent-magnet AC (PMAC) machines. Control techniques are reviewed separately for the two major classes of PMAC machines referred to as trapezoidal (i.e., brushless DC) and sinusoidal machines.
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