Introduction
1. Characteristics of Electric Motors
1.1 Introduction
1.2 Characteristics of DC Motors
1.3 Characteristics of a Three-phase Induction Motor
1.4 Characteristics of Synchronous Motors
1.5 Braking of Electric Motors
1.6 Starting of Electric Motors
Worked Examples
Problems
Multiple-Choice Questions
References
2. Dynamics of Electric Drives
2.1 Introduction
2.2 Classifi cation of Electric Drives
2.3 Basic Elements of an Electric Drive
2.4 Dynamic Conditions of a Drive System
2.5 Stability Considerations of Electrical Drives
Worked Examples
Problems
Multiple-Choice Questions
References
3. Converters for Feeding Electric Motors
3.1 A General Survey of Converters for Feeding Electric Motors
3.2 Phase Controlled Line Commutated Converters
3.3 DC Choppers
3.4 Inverters
3.5 Cycloconverters
3.6 AC Voltage Controller
Worked Examples
Problems
Multiple-Choice Questions
References
4. Control of Electric Motors
4.1 Induction Motor Drives
4.2 Synchronous Motor Drives
4.3 DC Drives
4.4 Permanent Magnet Synchronous Motor
4.5 Classifi cation of Permanent Magnet Synchronous Motors
4.6 Cycloconverter-fed Synchronous Motor
Worked Examples
Problems
Multiple-Choice Questions
References
5. Rating and Heating of Motors
5.1 Requirements of a Drive Motor
5.2 Power Losses and Heating of Electric Motors
5.3 Heating and Cooling of an Electric Motor
5.4 Classes of Duty and Selection of Motor
Worked Examples
Problems
Multiple-Choice Questions
References
6. Control Techniques for Electrical Drives
6.1 Introduction
6.2 Basic Features of an Electric Drive
6.3 Block Diagram Representation of Drive Systems
6.4 Signal Flow Graph Representation of the Systems
6.5 Transfer Functions
6.6 Transient Response of Closed Loop Drive Systems
6.7 Frequency Response Approach
6.8 Stability of Controlled Drives
6.9 Compensation and the Use of Controllers to Improve the Performance
Worked Examples
Problems
Multiple-Choice Questions
References
7. Drives for Specifi c Applications
7.1 Drive Considerations for Textile Mills
7.2 Steel Rolling Mills
7.3 Cranes and Hoist Drives
7.4 Cement Mills
7.5 Sugar Mills
7.6 Machine Tools
7.7 Paper Mills
7.8 Coal Mines
7.9 Centrifugal Pumps
7.10 Turbocompressors
7.11 Summary of Thyristorised AC and DC Drives
Multiple-Choice Questions
References
8. Microprocessors and Control of Electrical Drives
8.1 Introduction
8.2 Dedicated Hardware Systems versus Microprocessor Control
8.3 Application Areas and Functions of Microprocessors in Drive Technology
8.4 Control of Electric Drives Using Microprocessors
8.5 Some Aspects of Control System Design of Microprocessor Based Variable Speed Drives
8.6 Stepper Motors
Multiple-Choice Questions
References
Appendix A
Appendix B
Index