Author: John R. GrosserPublisher:
ISBN:
Category : Electric motors, Induction
Languages : en
Pages : 140
Book Description
A Study of Starting Current in a Three-phase Induction Motor
Author: John R. GrosserPublisher:
ISBN:
Category : Electric motors, Induction
Languages : en
Pages : 140
Book Description
Induction Motor Fault Diagnosis
Author: Subrata KarmakarPublisher: Springer
ISBN: 9811006245
Category : Technology & Engineering
Languages : en
Pages : 182
Book Description
This book covers the diagnosis and assessment of the various faults which can occur in a three phase induction motor, namely rotor broken-bar faults, rotor-mass unbalance faults, stator winding faults, single phasing faults and crawling. Following a brief introduction, the second chapter describes the construction and operation of an induction motor, then reviews the range of known motor faults, some existing techniques for fault analysis, and some useful signal processing techniques. It includes an extensive literature survey to establish the research trends in induction motor fault analysis. Chapters three to seven describe the assessment of each of the five primary fault types. In the third chapter the rotor broken-bar fault is discussed and then two methods of diagnosis are described; (i) diagnosis of the fault through Radar analysis of stator current Concordia and (ii) diagnosis through envelope analysis of motor startup current using Hilbert and Wavelet Transforms. In chapter four, rotor-mass unbalance faults are assessed, and diagnosis of both transient and steady state stator current has been analyzed using different techniques. If both rotor broken-bar and rotor-mass unbalance faults occur simultaneously then for identification an algorithm is provided in this chapter. Chapter five considers stator winding faults and five different analysis techniques, chapter six covers diagnosis of single phasing faults, and chapter seven describes crawling and its diagnosis. Finally, chapter eight focuses on fault assessment, and presents a summary of the book together with a discussion of prospects for future research on fault diagnosis.
Induction Motor Practice
Author: Adolphus Mansfield DudleyPublisher:
ISBN:
Category : Electric motors
Languages : en
Pages : 260
Book Description
Study of a Three Phase Induction Motor
Author: Geo. W. CarterA Study of the Field of a Three Phase Induction Motor
Author: Jesse W. ShumanTorque and Efficiency Conditions in a Three-phase Induction Motor with the Primary Star and Delta Connected
Author: Gilbert Maxey ThomasPublisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Three-phase Motors
Author: Steven D. DevinePublisher:
ISBN:
Category : Electric motors
Languages : en
Pages : 174
Book Description
A Study of the Effects on the Starting Characteristics by Connecting Capacitors in Series with a Three Phase Induction Motor
Author: Maoling LiuPublisher:
ISBN:
Category : Electric motors, Induction
Languages : en
Pages : 110
Book Description
Induction Motor Computer Models in Three-Phase Stator Reference Frames: A Technical Handbook
Author: Mikhail PustovetovPublisher: Bentham Science Publishers
ISBN: 9815124315
Category : Technology & Engineering
Languages : en
Pages : 193
Book Description
This book is a compilation of knowledge about computer models in the three-phase stator reference frame. Chapters explore several aspects of the topic and build upon research previously presented by contributors. The book aims to provide interesting solutions to problems encountered in the design of railway and analysis in railway motors. The modeling approaches proposed by the authors in this book may become an incentive for readers and researchers to develop their ‘lifehacks’ to solve new problems in induction motor design and testing. Key topics presented in the book: - Approximate calculations of induction motor equivalent T-shaped circuit parameters with the use of catalogue data - Simulations of different types of shaft load, including fluid coupling - Receiving static characteristics of an electric machine during simulation by means of dynamic model - Simulation of the electric drive’s specific applications with three-phase induction motors building - Direct start of an induction motor as part of an auxiliary drive of an AC electric locomotive, containing a capacitor phase splitter, starting with different types of shaft loads (fan or compressor). Special attention has been given to the description of the thermal model of an induction motor with a squirrel-cage rotor, which makes it possible to simulate operating modes when powered by an unbalanced voltage, as well as with squirrel cage defects. The thermal model is presented as a detailed superstructure to the model of electromechanical processes of an induction electric machine. Other key features of the book include references for further reading, an appendix for the parameters of the equivalent thermal circuit of an NVA-55 induction motor. The material presented in the book is of interest to railway motor engineers, specialists in electromechanics and electric drives who use SPICE-compatible CAD applications in their work.
Comparative Performance Analysis of Thyristor and IGBT Based Induction Motor Soft Starters
Author: Ajay SinghPublisher: GRIN Verlag
ISBN: 3668577064
Category : Science
Languages : en
Pages : 56
Book Description
Bachelor Thesis from the year 2012 in the subject Engineering - Power Engineering, grade: 10.0, Tribhuvan University (Institute of Engineering), course: Electrical Engineering, language: English, abstract: In this project, the performance of split-phase motor and three-phase induction motor drives for soft starting is evaluated. The pre systematically investigates and compares the characteristics of a variable voltage fed induction motor drive for two different types of soft starters; one based on IGBT and another based on Thyristor. The novelty of the work lies in the development of simple and flexible models for simulation purpose. This project investigates the influence of the parameters of the machine and of the soft starter on the dynamics of the induction machine start. The situations may reproduce actual situations occurred in practice, for example, the variation of initial voltage Vi, modification of the start time and load value. In this project we have investigated the relation between Total Harmonic Distortion and Power Factor of the IGBT and Thyristor based soft starter. Using an already predefined fire angle characteristic the influence of the initial voltage was also evaluated. Discussion of these results and conclusions as to the near-optimum types of profiles are delineated based on voltage and current profile fed to induction motor, starting times, and distortion in current with change in firing angle.