Modern Permanent Magnet Electric Machines
Theory and Control
- 312 pages
- English
- ePUB (mobile friendly)
- Available on iOS & Android
About This Book
The late 1980s saw the beginning of the PM brushless machine era, with the invention of high-energy density permanent magnets (PM) and the development of power electronics. Although induction motors are now the most popular electric motors, the impact of PM brushless machines on electromechanical drives is significant. Today, PM machines come second to induction machines. Replacement of electromagnetic field excitation systems by PMs brings the following benefits:
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- No electrical energy is absorbed by the field excitation system and thus there are no excitation losses, causing substantial increase in efficiency
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- Higher power density (kW/kg) and/or torque density (Nm/kg) than electromagnetic excitation
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- Better dynamic performance than motors with electromagnetic excitation (higher magnetic flux density in the air gap)
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- Simplification of construction and maintenance
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- Less expensive for some types of machines
Modern Permanent Magnet Electric Machines: Theory and Control serves as a textbook for undergraduate power engineering students who want to supplement and expand their knowledge in the fundamentals of magnetism, soft magnetic materials, permanent magnets (PMs), calculation of magnetic circuits with PMs, modern PM brushed DC machines and their controls, modern PM brushless DC motors and drive control, and modern PM generators. The book can help students learn more about electrical machines and can serve as a prescribed text for teaching elective undergraduate courses such as modern permanent magnet electrical machines. Since the book is written in a simple scientific language and without redundant mathematics, it can also be used by practicing engineers and managers employed in electrical machinery or electromagnetic device industries.
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Table of contents
- Cover Page
- Half-Title Page
- Title Page
- Copyright Page
- Contents
- Preface
- 1 Fundamentals of Magnetism
- 2 Soft Magnetic Materials
- 3 Permanent Magnets
- 4 Calculation of Magnetic Circuits With PMs
- 5 PM Brush DC Machines and Their Control
- 6 PM Brushless DC Motors and Drive Control
- 7 PM Synchronous Motors and Drive Control
- 8 Axial and Transverse Flux Motors
- 9 High-Speed PM Brushless Machines
- Appendix A Conversion of units
- Appendix B Lenz's law
- Appendix C Right-handed cork-screw rule
- Appendix D The right-hand grip rule
- Appendix E Left-hand and right-hand rules
- Symbols and Abbreviations
- References
- Index