A unique approach to sensorless control and regulator design of electric drives
Based on the author's vast industry experience and collaborative works with other industries, Control of Electric Machine Drive Systems is packed with tested, implemented, and verified ideas that engineers can apply to everyday problems in the field. Originally published in Korean as a textbook, this highly practical updated version features the latest information on the control of electric machines and apparatus, as well as a new chapter on sensorless control of AC machines, a topic not covered in any other publication.
The book begins by explaining the features of the electric drive system and trends of development in related technologies, as well as the basic structure and operation principles of the electric machine. It also addresses steady state characteristics and control of the machines and the transformation of physical variables of AC machines using reference frame theory in order to provide a proper foundation for the material.
The heart of the book reviews several control algorithms of electric machines and power converters, explaining active damping and how to regulate current, speed, and position in a feedback manner. Seung-Ki Sul introduces tricks to enhance the control performance of the electric machines, and the algorithm to detect the phase angle of an AC source and to control DC link voltages of power converters. Topics also covered are:
Vector controlControl algorithms for position/speed sensorless drive of AC machinesMethods for identifying the parameters of electric machines and power convertersThe matrix algebra to model a three-phase AC machine in d-q-n axes
Every chapter features exercise problems drawn from actual industry experience. The book also includes more than 300 figures and offers access to an FTP site, which provides MATLAB programs for selected problems. The book's practicality and realworld relatability make it an invaluable resource for professionals and engineers involved in the research and development of electric machine drive business, industrial drive designers, and senior undergraduate and graduate students.
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To visit this book's FTP site to download MATLAB codes, please click on this link: ftp://ftp.wiley.com/public/sci-tech-med/electric-machine/
MATLAB codes are also downloadable from Wiley Booksupport Site at http://booksupport.wiley.com
Seung-Ki Sul, PhD, serves as the director of Electrical Engineering and Science Research Center at Seoul National University in Korea. A well-known world authority on the subject of electrical drives, Dr. Sul has lectured on this topic at Seoul National University for the last seventeen years. Previously, he served as the acting director and consultant at Yaskawa Electric Company in Japan. An IEEE Fellow since 2000, Dr. Sul holds fifteen domestic patents and eight international patents.
Preface. 1 Introduction. 1.1 Introduction. 1.2 Basics of Mechanics. 1.3 Torque Speed Curve of Typical Mechanical Loads. 2 Basic Structure and Modeling of Electric Machines and Power Converters. 2.1 Structure and Modeling of DC Machine. 2.2 Analysis of Steady-State Operation. 2.3 Analysis of Transient State of DC Machine. 2.4 Power Electronic Circuit to Drive DC Machine. 2.5 Rotating Magnetic Motive Force. 2.6 Steady-State Analysis of a Synchronous Machine. 2.7 Linear Electric Machine. 2.8 Capability Curve of Synchronous Machine. 2.9 Parameter Variation of Synchronous Machine. 2.10 Steady-State Analysis of Induction Machine. 2.11 Generator Operation of an Induction Machine. 2.12 Variation of Parameters of an Induction Machine. 2.13 Classification of Induction Machines According to Speed Torque Characteristics. 2.14 Quasi-Transient State Analysis. 2.15 Capability Curve of an Induction Machine. 2.16 Comparison of AC Machine and DC Machine. 2.17 Variable-Speed Control of Induction Machine Based on Steady-State Characteristics. 2.18 Modeling of Power Converters. 2.19 Parameter Conversion Using Per Unit Method. 3 Reference Frame Transformation and Transient State Analysis of Three-Phase AC Machines. 3.1 Complex Vector. 3.2 d q n Modeling of an Induction Machine Based on Complex Space Vector. 3.3 d q n Modeling of a Synchronous Machine Based on Complex Space Vector. 4 Design of Regulators for Electric Machines and Power Converters. 4.1 Active Damping. 4.2 Current Regulator. 4.3 Speed Regulator. 4.4 Position Regulator. 4.5 Detection of Phase Angle of AC Voltage. 4.6 Voltage Regulator. 5 Vector Control. 5.1 Instantaneous Torque Control. 5.2 Vector Control of Induction Machine. 5.3 Rotor Flux Linkage Estimator. 5.4 Flux Weakening Control. 6 Position/Speed Sensorless Control of AC Machines. 6.1 Sensorless Control of Induction Machine. 6.2 Sensorless Control of Surface-Mounted Permanent Magnet Synchronous Machine (SMPMSM). 6.3 Sensorless Control of Interior Permanent Magnet Synchronous Machine (IPMSM). 6.4 Sensorless Control Employing High-Frequency Signal Injection. 7 Practical Issues. 7.1 Output Voltage Distortion Due to Dead Time and Its Compensation. 7.2 Measurement of Phase Current. 7.3 Problems Due to Digital Signal Processing of Current Regulation Loop. Appendix A Measurement and Estimation of Parameters of Electric Machinery. A.1 Parameter Estimation. A.2 Parameter Estimation of Electric Machines Using Regulators of Drive System. A.3 Estimation of Mechanical Parameters. Appendix B d q Modeling Using Matrix Equations. B.1 Reference Frame and Transformation Matrix. B.2 d q Modeling of Induction Machine Using Transformation Matrix. B.3 d q Modeling of Synchronous Machine Using Transformation Matrix. Index.