Magnetic Bearings and Bearingless Drives 1st Edition by Akira Chiba, Tadashi Fukao, Osamu Ichikawa, Masahide Oshima, Masatugu Takemoto, David Dorrell ISBN 978-0750657273 0750657278
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Magnetic Bearings and Bearingless Drives 1st Edition by Akira Chiba, Tadashi Fukao, Osamu Ichikawa, Masahide Oshima, Masatugu Takemoto, David Dorrell – Ebook PDF Instant Download/Delivery: 978-0750657273, 0750657278
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Product details:
ISBN 10: 0750657278
ISBN 13: 978-0750657273
Author: Akira Chiba, Tadashi Fukao, Osamu Ichikawa, Masahide Oshima, Masatugu Takemoto, David Dorrell
The application of bearingless drives is emerging as an important technique in the areas of high-speed machinery and motion-control, and this book aims to provide a thorough grounding in the principles behind this cutting-edge technology. Basic principles are described in detail with practical examples to aid understanding, and the different types of bearingless drives are introduced, along with coverage of test machines and applications.Aimed at practising electrical and mechanical engineers and advanced students, Magnetic Bearings and Bearingless Drives provides an essential guide to an area of engineering previously only fully covered by large numbers of academic papers.
· Unique and comprehensive coverage of a cutting-edge subject for electrical and mechanical engineers · A reference text and survey for designers, manufacturers and users of high-speed motors, generators and electrical drive systems · Examines the basic principles behind magnetic bearings, with key technologies and applications illustrated through examples and case studies
Table of contents:
1 Introduction
1.1 Magnetic bearing and motor drive
1.2 Bearingless drives
1.3 Definition and related technologies
1.4 Early developments
1.5 Bearingless structures
1.6 Comparisons
1.7 Winding structures
1.8 Applications
References
2 Electro-magnetics and mathematical model of magnetic bearings
2.1 Electro-mechanical structure and operating principles
2.2 Electric equivalent circuit and inductance
2.3 Stored magnetic energy and force
2.4 Radial magnetic bearing
2.5 Unbalance pull force
2.6 Block diagram and mechanical system
Reference
3 Magnetic bearing controllers
3.1 Design principles in one-axis magnetic suspension
3.2 Adjustment of PID gains
3.3 Interference in two perpendicular axes
3.4 Unbalance force and elimination
3.5 Eccentric displacement
3.6 Synchronized displacement suppression
4 Mechanical dynamics
4.1 Two-axis system
4.2 Four-axis and five-axis systems
4.3 Thrust magnetic bearing and requirement of five-axis suspension
References
5 Power electronic circuits for magnetic bearings
5.1 Structure and principles of power electronic circuits
5.2 PWM operation
5.3 Current feedback
5.4 Current driver operating area
5.5 Power devices and gate drive circuits
6 Primitive model and control strategy of bearingless motors
6.1 Principles of radial force generation
6.2 Two-pole bearingless motor
6.3 MMF and permeance
6.4 Magnetic potential and flux distribution
6.5 Inductance matrix
6.6 Radial force and current
6.7 The de excitation of the primitive bearingless motor
6.8 AC excitation and revolving magnetic field
6.9 Inductance measurements
7 Analysis in rotational coordinates and magnetic suspension strategy for bearingless drives with 2-pole and 4-pole windings
7.1 Vector control theory of electrical motors
7.2 Coordinate transformation and torque regulation
7.3 Vector control theory in bearingless motors
7.4 Coordinate transformation from de to ac bearingless machines
7.5 System block diagrams of bearingless machines
References
8 Field orientation, VA requirement and magnetic saturation
8.1 Misalignment of field orientation
8.2 VA requirement
8.3 Magnetic saturation
References
9 Cylindrical permanent magnet synchronous bearingless motors
9.1 Structure of surface permanent magnet (SPM) rotor
9.2 Radial suspension force and suspension winding current
9.3 Equations of voltage and current
9.4 Guideline for permanent magnet thickness and airgap length
9.5 Irreversible permanent magnet demagnetization and MMF limitations of stator windings
9.6 Control system configuration
References
10 Inset types of permanent magnet bearingless motor
10.1 Structure and features of an inset type of permanent magnet rotor
10.2 Mutual interference between radial suspension forces
10.3 Rotor position control strategy
10.4 Identification of suspension force parameters
References
11 Buried permanent magnet bearingless motors
11.1 ВРМ rotor structures
11.2 Suspension force for unity current and permanent magnet demagnetization
11.3 Rotor position control strategy
References
12 Synchronous reluctance bearingless motors
12.1 Torque characteristics
12.2 Radial force characteristics
12.3 Drive systems
References
13 Bearingless induction motors
13.1 Rotor structure and suspension force
13.2 Indirect type drives 13.3 Direct type drives
13.4 Two-pole motor drive
References
14 Homopolar, hybrid and consequent-pole bearingless motors
14.1 Structures and principles
14.2 Number of poles
14.3 Drive systems
References
15 Switched reluctance bearingless motors
15.1 Configuration of stator windings and principles of suspension force generation
15.2 Derivation of inductances
15.3 Assumption and calculation of permeances
15.4
Theoretical formulae of suspension force and torque
15.5
A drive system
15.6
A feed-forward compensator for vibration reduction considering magnetic attraction force
References
16 Winding arrangement variations
16.1 Modified radial magnetic bearings
16.2 Modified motors
16.3 p-Pole and (p±2)-pole windings
References
17 Mechanical structure and position regulation
17.1 Mechanical structure
17.2 Axial gap bearingless motors
References
18 Displacement sensors and sensorless operation
18.1 Principles of displacement sensor
18.2 Improvements in sensitivity
18.3 Inductive and eddy current sensors
18.4 Sensorless bearingless motor
References
19 Controllers and power electronics
19.1 Structure of digital controllers
19.2 Discrete-time systems of PID controllers with the z-transform
20 Design procedure and examples
20.1 An induction type bearingless motor
20.2 A permanent magnet type bearingless motor
References
21 Applications and test machines
21.1 Canned pumps and drives
21.2 Compact pumps, bubble bed reactor
21.3 Spindle motor and semiconductor processing
References
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Tags: Akira Chiba, Tadashi Fukao, Osamu Ichikawa, Masahide Oshima, Masatugu Takemoto, David Dorrell, Magnetic Bearings, Bearingless Drives