Handbook of Asynchronous Machines with Variable Speed

Hubert Razik is Full Professor of electrical engineering at Claude Bernard Lyon I University in France and works with the Ampère laboratory in Villeurbanne where he integrated the RDS (Reliability - Diagnosis - Safe control) team.

• Foreword xiiiIntroduction xviiChapter 1. Sensors and Electrical Measurements 11.1. Optical encoder 21.2.The velocity measurement 71.3. The resolver 91.4. The isolated measurement 141.5. The numerical aspect 151.6. The analog to digital converter 161.7. The digital-to-analog converter 211.8. The digital output 221.9. The arithmetic logic unit 221.10. Real time or abuse language 231.11. Programming 24Chapter 2. Analog, Numerical Control 252.1. Structure of a regulator 252.2. Stability of a system 262.3. Precision of systems 302.4. Correction of systems 312.5. Nonlinear control 342.6. Practical method of identification and control 352.7. The digital correctors 362.8. Classical controllers 452.9. Disadvantages of digital controller 52Chapter 3.  Models of Asynchronous Machines 593.1. The induction motor 593.2. The squirrel cage induction motor 663.3. The static and dynamic behavior 823.4. Winding and induced harmonics 993.5. Squirrel cage 1153.6. Variation in air-gap permeance 1183.7. Noise and vibrations 1213.8. Influence of rotor frequency 1253.9. Thermal behavior 130Chapter 4. Speed Variation 1374.1. Cases of multiphase machines 1374.2. Control of asynchronous motors 1644.3. Identification of parameter aspects 2164.4. Voltage inverter converters 2274.5. Rectifiers based on thePWM 268Chapter 5. Tools of Fuzzy Logic 2735.1. Preamble 2735.2. Introduction 2745.3. Fuzzy logic 2755.4. Fuzzy logic controller 2805.5. Fuzzy and adaptive PI 2845.6. Conclusion 295Chapter 6. Diagnostics and Signals Pointing to a Change 2976.1. Signals and measurements 2986.2. Defects 2996.3. Analysis of signals 3096.4. Some considerations regarding broken bar defects 3176.5.Evaluation of the severity of broken bars 322Exercise No. 1: Fuzzy Logic 3371.1. Adaptive k and ki coefficients in function of the error 3371.2. Adaptive k and ki coefficients in function of the error and its derivative 3381.3. Answers 339Exercise No. 2: The Stator Defect 3452.1. Equations of the induction motor under stator defect 3472.2.Torque ripple due to a stator defect 3482.3. Fault current estimation 3492.4. Schematic model of three-phase induction motor under a stator defect 3502.5. Answers 351Exercise No. 3: The Control of Five-Phase Induction Motors 3573.1. The five-phase system 3583.2. Distribution of active currents 3593.3. A model for control 3623.4. Answers 364Exercise No. 4: The Control of Serial Connected Induction Motors 3734.1. Study about the serial connection of two five-phase induction motors 3744.2. Study on the serial connection of several seven-phase induction motors 3754.3. Study on the serial connection of multi-phase induction motors 3774.4. Answers 378Exercise No. 5: Fault Detection of a Three-Phase Voltage Inverter Converter 3855.1. A conducting fault 3865.2. Fault detector 3875.3. Monitoring of the DC component 3895.4. Answers 390Appendix. Some Mathematical Expressions 393Bibliography 399Index 407