Results 141 to 150 of about 467 (182)
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Brushless excitation systems for synchronous machines
Electronics and Power, 1975This article gives a simple approach to the various commonly used systems of brushless excitation for synchronous machines. The systems described have been designed for medium and large-size motors and generators of the salient-pole type operating at 50 or 60 ...
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Exciting System Selection for Brushless Synchronous Machine
8th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MEDPOWER 2012), 2012The paper deals with the special brushless synchronous electrical machine (SBSM) working with an extensive variable load. It's exciting systems usually keep cosφ ≈ 1. Among them are unmanned deep-well oil pumps drives, wind renewable energy SBSM, etc. The SBSMs usually works in harsh climate conditions, where thyristor or IGBT exciting systems are not ...
O. Ustun +4 more
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Performance of Brushless Induction Excited Synchronous Generator
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2019This paper reports a brushless induction excited synchronous generator. An induction machine (IM) and a synchronous machine (SM) are embedded in the same machine frame. To avoid the magnetic interaction between these two machines, they are configured for different numbers of poles. However, rotor windings of both machines are electrically coupled using
Chandan Chakraborty, Yalla Tirumala Rao
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Model development and validation of brushless exciters
2015 IEEE Eindhoven PowerTech, 2015This paper describes the process of performing site tests and model development of brushless exciters. Brushless exciters are often a source for model inaccuracy when studying synchronous machines and excitation system, which may lead to incorrect stabiliser design and poor performance.
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Excitation Control of a Brushless Synchronous Motor
IEEE Transactions on Industry Applications, 1984A simple system is presented for controlling the excitation of a brushless synchronous motor independently of the motor speed or load angle. The system comprises a pulsewidth modulated (PWM) inverter provided with controllable pulsenumber. Experimental measurements of the induced rotor excitation shows that a wide range of excitation control is ...
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Nonlinear behavior for periodically excited brushless motor
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2019Purpose Due to the coupling between the direct-axis current, quadrature-axis current and rotor speed, the dynamic response could be strongly nonlinear. Besides, if the working condition is severe, the loading is no longer constant and multiple harmonics could be introduced.
Jianzhe Huang, Xingzhong Xiong
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Brushless and self-excited single-phase alternator
Proceedings of the Institution of Electrical Engineers, 1967The paper describes a brushless, self-excited alternator in which the reverse-rotation component of the armature m.m.f. is used to increase the excitation current as the load is increased. The excitation scheme is power-factor sensitive, since the increase is greater as the load becomes more inductive, and the voltage regulation is within that normally
I.R. Smith, J.M. Raven, S.K. Tso
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A Self-Excitation Scheme for a Brushless Synchronous Generator
2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), 2019This paper proposes a self-excitation scheme for a brushless wound rotor synchronous generator. The proposed generator excitation scheme uses thyristor switches to control zero-sequence third harmonic current flow to the neutral wire of the three-phase armature winding.
Ghulam Jawad Sirewal +2 more
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Design of Brushless Electric Excitation Synchronous Machine
Advanced Materials Research, 2012Brushless electric excitation synchronous machine is a new kind of AC machine. There are two sets of windings with different pole numbers on the stator. It eliminates the brushes and slip rings. The air gap magnetic density of brushless electric excitation synchronous machine is achieved based on Ansoft.
Feng Ge Zhang +2 more
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A High Initial Response Brushless Excitation System
IEEE Transactions on Power Apparatus and Systems, 1971A high initial response excitation system retaining the advantages of the absence of commutators, collectors and brushes while responding with the speed of an electronic exciter has been developed. Calculated performance of this system has been firmed by factory tests.
T. Dillman +4 more
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