Book description
With countless electric motors being used in daily life, in everything from transportation and medical treatment to military operation and communication, unexpected failures can lead to the loss of valuable human life or a costly standstill in industry. To prevent this, it is important to precisely detect or continuously monitor the working condition of a motor. Electric Machines: Modeling, Condition Monitoring, and Fault Diagnosis reviews diagnosis technologies and provides an application guide for readers who want to research, develop, and implement a more effective fault diagnosis and condition monitoring scheme—thus improving safety and reliability in electric motor operation. It also supplies a solid foundation in the fundamentals of fault cause and effect.
Combines Theoretical Analysis and Practical Application
Written by experts in electrical engineering, the book approaches the fault diagnosis of electrical motors through the process of theoretical analysis and practical application. It begins by explaining how to analyze the fundamentals of machine failure using the winding functions method, the magnetic equivalent circuit method, and finite element analysis. It then examines how to implement fault diagnosis using techniques such as the motor current signature analysis (MCSA) method, frequency domain method, model-based techniques, and a pattern recognition scheme. Emphasizing the MCSA implementation method, the authors discuss robust signal processing techniques and the implementation of reference-frame-theory-based fault diagnosis for hybrid vehicles.
Fault Modeling, Diagnosis, and Implementation in One Volume
Based on years of research and development at the Electrical Machines & Power Electronics (EMPE) Laboratory at Texas A&M University, this book describes practical analysis and implementation strategies that readers can use in their work. It brings together, in one volume, the fundamentals of motor fault conditions, advanced fault modeling theory, fault diagnosis techniques, and low-cost DSP-based fault diagnosis implementation strategies.
Table of contents
- Cover Page
- Title Page
- Copyright Page
- Contents
- Preface
- 1 Introduction
- 2 Faults in Induction and Synchronous Motors
- 3 Modeling of Electric Machines Using Winding and Modified Winding Function Approaches
-
4 Modeling of Electric Machines Using Magnetic Equivalent Circuit Method
- 4.1 Introduction
- 4.2 Indirect Application of Magnetic Equivalent Circuit for Analysis of Salient Pole Synchronous Machines
- 4.3 Indirect Application of Magnetic Equivalent Circuit for Analysis of Induction Machines
- 4.4 Direct Application of Magnetic Equivalent Circuit Considering Nonlinear Magnetic Characteristic for Machine Analysis
- Appendix A: Induction Machine Parameters
- Appendix B: Node Permeance Matrices
- References
-
5 Analysis of Faulty Induction Motors Using Finite Element Method
- 5.1 Introduction
- 5.2 Geometrical Modeling of Faulty Induction Motors Using Time-Stepping Finite Element Method (TSFEM)
- 5.3 Coupling of Electrical Circuits and Finite Element Area
- 5.4 Modeling Internal Faults Using Finite Element Method
- 5.5 Impact of Magnetic Saturation on Accurate Fault Detection in Induction Motors
- References
-
6 Fault Diagnosis of Electric Machines Using Techniques Based on Frequency Domain
- 6.1 Introduction
-
6.2 Some Definitions and Examples Related to Signal Processing
- 6.2.1 Continuous versus Discrete or Digital or Sampled Signal
- 6.2.2 Continuous, Discrete Fourier Transforms, and Nonparametric Power Spectrum Estimation
- 6.2.3 Parametric Power Spectrum estimation
- 6.2.4 Power Spectrum estimation Using Higher-Order Spectra (HOS)
- 6.2.5 Power Spectrum Estimation Using Swept Sine Measurements or Digital Frequency Locked Loop Technique (DFLL)
-
6.3 Diagnosis of Machine Faults Using Frequency-Domain-Based Techniques
- 6.3.1 Detection of Motor Bearing Faults
-
6.3.2 Detection of Stator Faults
- 6.3.2.1 Detection of Stator Faults Using External Flux Sensors
- 6.3.2.2 Detection of Stator Faults Using Line Current Harmonics
- 6.3.2.3 Detection of Stator Faults Using Terminal Voltage Harmonics at Switch-Off
- 6.3.2.4 Detection of Stator Faults Using Field Current and Rotor Search Coil Harmonics in Synchronous Machines
- 6.3.2.5 Detection of Stator Faults Using Rotor Current and Search Coil Voltages Harmonics in Wound Rotor Induction Machines
-
6.3.3 Detection of Rotor Faults
- 6.3.3.1 Detection of Rotor Faults in Stator Line Current, Speed, Torque, and Power
- 6.3.3.2 Detection of Rotor Faults in External and Internal Search Coil
- 6.3.3.3 Detection of Rotor Faults Using Terminal Voltage Harmonics at Switch-Off
- 6.3.3.4 Detection of Rotor Faults at Start-Up
- 6.3.3.5 Detection of Rotor Faults in Presence of Interbar Current Using Axial Vibration Signals
- 6.3.4 Detection of Eccentricity Faults
- 6.3.5 Detection of Faults in Inverter-Fed Induction Machines
- References
-
7 Fault Diagnosis of Electric Machines Using Model-Based Techniques
- 7.1 Introduction
- 7.2 Model of Healthy Three-Phase Squirrel-Cage Induction Motor
- 7.3 Model of Three-Phase Squirrel-Cage Induction Motor with Stator Inter-Turn Faults
- 7.4 Model of Squirrel-Cage Induction Motor with Incipient Broken Rotor Bar and End-Ring Faults
- 7.5 Model of Squirrel-Cage Induction Motor with Eccentricity Faults
- 7.6 Model of a Synchronous Reluctance Motor with Stator Fault
- 7.7 Model of a Salient Pole Synchronous Motor with Dynamic Eccentricity Faults
- References
- 8 Application of Pattern Recognition to Fault Diagnosis
- 9 Implementation of Motor Current Signature Analysis Fault Diagnosis Based on Digital Signal Processors
- 10 Electric Implementation of Fault Diagnosis in Hybrid Vehicles Based on Reference Frame Theory
- 11 Robust Signal Processing Techniques for the Implementation of Motor Current Signature Analysis Diagnosis Based on Digital Signal Processors
- Index
Product information
- Title: Electric Machines
- Author(s):
- Release date: December 2017
- Publisher(s): CRC Press
- ISBN: 9781351837873
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