Foreword
Chapter 1 Introduction
1.1 Brushless DC motor is the most promising mechatronic motor
1.2 None Technical advantages of brush DC motors
1.3 The 21st century is the century of widespread promotion and application of permanent magnet brushless DC motors
1.4 The main factors promoting the vigorous development of brushless DC motor technology and market
1.5 Brushless DC motor technology development trends
1.6 Summary
References
Chapter 2 Principles and principles of square wave drive and sine wave drive Comparison
2.1 Brushless DC motor (BLDC) and permanent magnet synchronous motor (PMSM)
2.2 Torque generation principles of square wave drive and sine wave drive
2.3 Comparison of the structure and performance of brushless DC motors and permanent magnet synchronous motors
2.4 Summary
References
Chapter 3 Windings of Brushless DC Motors Connection and conduction methods and their selection
3.1 Common winding connection and conduction methods
3.1.1 Two-phase winding motor connection and conduction methods
3.1 .2 Four-phase winding motor connection and conduction methods
3.1.3 Three-phase winding motor connection and conduction methods
3.1.4 Five-phase star winding motor connection and conduction methods Mode
3.1.5 Summary
3.2 Analysis and comparison of two-phase, three-phase and four-phase different winding connection and conduction modes
3.3 Winding utilization and Analysis of the optimal conduction angle
3.3.1 Bridge circuit closed winding and star winding
3.3.2 Optimum conduction angle of non-bridge m-phase brushless DC motor Analysis
3.3.3 Summary
3.4 Analysis and selection of the △ and Y connection methods of the three-phase windings of bridge commutation
3.4.1 Three-phase brushless DC motor Ya and △ winding connections and their conversion relationships
3.4.2 Comparison of delta and star connections for the same motor
3.4.3 3rd harmonic circulation and delta connection conditions
3.4.4 Application examples
3.4.5 Summary
3.5 Several types of conditions under the same copper loss conditions Comparison of motor torques with different numbers of phases and different conduction angles
References
Chapter 4 Mathematical Model, Characteristics and Parameters of Brushless DC Motors
4.1 Simplified model and basic characteristics of brushless DC motor
4.1.1 Basic assumptions and basic equivalent circuit of simplified model
4.1.2 Unified expression of mechanical characteristics of brushless DC motor
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4.1.3 The ideal no-load point average current is not equal to zero
4.1.7 A three-phase brushless DC motor characteristics and coefficient calculation example
4.2 Winding inductance vs. Influence of brushed DC motor characteristics
4.3 Non-bridge type 120.
Analysis of nonlinear operating characteristics of a three-phase brushless DC motor during conduction
4.4 Mathematical model and basic characteristics of a three-phase brushless DC motor taking winding inductance into account
4.4.1 Commutation Process analysis and analytical expressions of transient three-phase current
4.4.2 Expressions of average current and average electromagnetic torque
4.4.3 Concise expressions of average current and average electromagnetic torque Formula and function diagram
4.4.4 Approximate calculation formula
4.4.5 Torque coefficient KT and back electromotive force coefficient KE
4.4.6 Taking into account the winding Mechanical characteristics of brushless DC motors with inductance
4.4.7 Graphical method to calculate motor characteristics and practical verification
4.4.8 Effect of changes in winding resistance and inductance values ??on motor characteristics
4.4.9 Summary,
4.5 Single-circuit equivalent circuit of brushless DC motor and apparent resistance R
4.6 Calculation of power and efficiency, copper loss and current effective value
4.7 Calculation of winding resistance and inductance
4.7.1 Calculation of resistance
4.7.2 Calculation of inductance
4.7.3 An example of inductance calculation
References
Chapter 5 Brushless DC Motor Fractional Slot Windings and Polyphase Windings
5.1 Brushless DC Motor Stator and Windings Structure
5.2 Fractional slot winding of brushless DC motor
5.2.1 Advantages of fractional slot winding
5.2.2 Number of slot poles of fractional slot winding z. /p. Combination constraints
5.2.3 Fractional slot concentrated winding z with three-phase winding pitch y=1. /p. Combination conditions
5.2.4 Calculation of winding coefficients for three-phase fractional slot windings
5.2.5 Combinations of slot pole numbers appearing in pairs
5.2.6 / Summary
5.3 Selection and application of slot number combinations for fractional slot concentrated winding
5.3.1 Single-layer winding and double-layer winding
5.3.2 Stator magnet Momentum harmonics and rotor eddy current losses
5.3.3 The relationship between the LCM value of the cogging combination and the cogging torque
5.3.4 The cogging combination with an odd number of z and UMP Questions
5.3.5 Ripple torque under load
5.3.6 Selection of paired slot-pole combinations and slot-pole ratio
5.3. 7 Concentrated winding motor with large and small tooth structure
5.3.8 Summary
5.4 Fractional slot winding electromotive force phasor diagram and winding expansion diagram
5.4.1 Phasor Diagram and winding electromotive force phasor star diagram
5.4.2 Fractional slot concentrated winding electromotive force phasor star diagram
5.4.3 Three-phase fractional slot concentrated winding motor winding expansion drawing Method steps
5.5 Polyphase winding
5.5.1 Symmetry conditions of multi-phase fractional slot winding
5.5.2 Number of slot poles of five-phase fractional slot concentrated winding Combination z. /(2P.
) analysis
5.5.3 Z is an odd number of slot pole combinations and UMP problems
5.5.4 Calculation of winding coefficients of five-phase fractional slot concentrated winding motors
5.5.5 An example of five-phase winding connection and Hall sensor position
5.5.6 Summary
5.6 Analysis of a six-phase brushless DC motor winding structure
5.6.1 Main advantages of six-phase brushless DC motor system
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Chapter 6 Magnetic Circuit and Back Electromotive Force
Chapter 7 Determination of the rotor position sensor and its position
Chapter 8 Armature Reaction of Permanent Magnet Brushless DC Motor
Chapter 9 Torque Ripple of Brushless DC Motor
Chapter 10 Cogging torque of permanent magnet brushless DC motor and its weakening method
Chapter 11 Selection of motor design elements and determination of main dimensions
Chapter 12 None Basic Control Technology of Brush DC Motor
Chapter 13 Position Sensorless Control of Brushless DC Motor
Chapter 14 Low-Cost Positive Wave Drive Control of Brushless DC Motor
Chapter 15 Single-phase brushless DC motor and control