Results 191 to 200 of about 6,999 (231)

Design of Brushless Electric Excitation Synchronous Machine

Advanced Materials Research, 2012
Brushless 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, Guang Long Jia, Xiu Ping Wang   +2 more
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Nonlinear behavior for periodically excited brushless motor

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2019
Purpose 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 EXCITATION SYSTEM ELECTROMAGNETIC DESIGN AND ANALYSES

Journal of Energy - Energija, 2022
The brushless synchronous generator (SG) excitation system consists of a main exciter, a permanent magnet generator (PMG) of consequent rotor poles type, and an automatic voltage regulator (AVR). Both exciter machines have been properly designed and analysed.
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Brushless excitation systems for synchronous machines

Electronics and Power, 1975
This 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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Brushless and current-compounded frequency-convertor exciter

IEE Proceedings B Electric Power Applications, 1986
The paper describes a frequency-convertor AC exciter for use with a synchronous generator to produce a unit which is brushless, self-excited and current compounded. The stator contains a shunt winding fed from the output voltage of the generator and a series winding carrying the output current.
I.R. Smith, J.G. Kettleborough, T.C. Kok
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Brushless and self-excited single-phase alternator

Proceedings of the Institution of Electrical Engineers, 1967
The 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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Brushless rotating exciter conversion to main field static exciter system

Conference Record of 2013 Annual IEEE Pulp and Paper Industry Technical Conference (PPIC), 2013
In the 1960s, many generator manufacturers began providing large scale brushless rotating exciters for use on a variety of turbine generator applications. The brushless exciters became increasingly popular in the 1970s through the present. Prior to brushless excited generators, rotating exciters were all rotating brush type which required brushes and ...
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Brushless D-C excited synchronous motor

Electrical Engineering, 1960
SILICON RECTIFIERS have been used for several years to make brushless d-c excited rotating-field synchronous generators. The induced field current and voltage during starting have made similar brushless synchronous motors impractical. The operation and performance of a new brushless synchronous motor, made practical by the development of high-current ...
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Excitation Control of a Brushless Synchronous Motor

IEEE Transactions on Industry Applications, 1984
A 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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Exciting System Selection for Brushless Synchronous Machine

8th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MEDPOWER 2012), 2012
The 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, P.G.A. Zade, R.N. Tuncay, S.B. Ozturk, O.C. Kivanc   +4 more
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