Permanent magnet motor works catalog

Preface

Chapter I Introduction

Section I. Overview of the Development and Application of Permanent Magnetic Materials

I. Classification of Permanent Magnetic Materials

II. History of the Development of Permanent Magnetic Materials

III. Overview of the Development of Permanent Magnetic Materials Industry

IV. Application Fields of Permanent Magnetic Materials

Section II. Permanent Magnetic Motors and Their Development Overview

I. Development History of Permanent Magnet Motors

II. Classification and Characteristics of Permanent Magnet Motors

III. Applications of Permanent Magnet Motors

Chapter II Permanent Magnet Materials

Section I. Magnetic Properties and Classification of Materials

I. Sources of Magnetic Properties

II. Classification of Ferromagnetic Materials

III. Commonly Used Magnetic unit system

Section 2, the main performance parameters of permanent magnetic materials

I. Hysteresis loop of ferromagnetic materials

II. Demagnetization curve and endowment demagnetization curve of permanent magnetic materials

III. Stability

Second, the stability of the treatment method

Section IV, the main permanent magnet materials and their characteristics

One, martensitic permanent magnets

Two, ferronickel-cobalt-based permanent magnets

Three, machinable permanent magnets

Quarterly, ferrite permanent magnets

Five, rare-earth cobalt permanent magnets

Sixth, neodymium-iron-boron permanent magnets

VII, bonded permanent magnets

VII.

VII. Bonded permanent magnets

VIII. Comprehensive comparison of permanent magnet materials commonly used in electric motors

Section V. Production process of permanent magnet materials

I. Typical process

II. Orientation technology of permanent magnet materials

Section VI. Magnetization of permanent magnet materials

I. Saturated magnetizing strength

II.

Third, the magnetization method

Section 7, the test of magnetic properties of permanent magnet materials

I, the measurement of magnetic flux

II, the measurement of magnetic density

III, the measurement of demagnetization curve

Chapter 3, the design and calculation of the magnetic circuit of the permanent magnet motor

Section 1, the magnetic field and the magnetic circuit

I, the magnetic induction intensity, magnetic field strength and magnetic permeability

II. Magnetic flux, magnetic pressure, and magnetic dynamic potential

III. Magnetic circuit parameters

IV. Classification of magnetic circuits

Section II. Magnetic circuit structure of permanent magnet motors

Section III. Calculation of magnetic circuits of permanent magnet motors

I. Equivalent magnetic circuits of permanent magnets

II. External magnetic circuit of permanent magnet motor

III, Calculation of the main magnetic circuit of a permanent magnet motor

IV. Calculation of the characteristics of the external magnetic circuit of a permanent magnet motor

V. Calculation of the leakage permeability

VI. Equivalent magnetic circuit of a permanent magnet motor

Section IV. Working diagram method of permanent magnets

I. Approximate calculation of demagnetization curves

II. Approximate calculation of the relative restitution permeability

III, Permanent magnet working diagram method

IV. Solving permanent magnet working diagram by computer

Section V. Magnetic circuit analysis method

I. Calculation of no-load working point

II. Calculation of load working point

Section VI. Magnetic circuit design of permanent magnet motor

I. Selection of permanent magnet

II.

III. Determination of permanent magnet size

IV. Estimation of air-gap magnetic density of surface-type permanent magnet motors

Chapter IV: Magnetic field analysis of permanent magnet motors

Section I: Differential equation of the magnetic field Marginal value problem

I. Partial differential equations satisfied by the bit function

II. Determination of boundary conditions

III. Marginal problems

Section II: Fundamentals of the finite element method

I. Conditional variational problems

II. Sectional interpolation

III. Unitary analysis

IV. Overall synthesis

V. Handling of imposed boundary conditions

VI. System of equations

Section III: Equivalence of permanent magnets

II. Equivalent surface current method

III. Equivalence of tile-shaped pole

Section IV: Eddy current field analysis based on field-circuit coupling

I. Finite-element model of eddy current field analysis and its discretization

II. Some problems of eddy current field analysis

III. Coupling with external circuits

Section V: Finite-element model and its discretization

VII. p>Section V. Parameter Calculation Based on Finite Element Analysis

I. Calculation of Flux and Magnetic Chain

II. Distribution of Radial Component of Air Gap Magnetic Density

III. Calculation of Inductance

IV. Calculation of Losses

V. Calculation of Electromagnetic Torque

Section VI. Handling of Certain Problems in Finite Element Analysis of Electric Motors

I, Treatment of laminated cores

II. Determination of the first type of boundary conditions

III. Treatment of slot currents

IV. Application of periodic boundary conditions

V. Treatment of kinematic boundaries

Section VII. Solving magnetic field inverse problems in permanent magnet motors

I. Introduction to commonly used global optimization algorithms

II. Permanent magnet pole optimization of starter motors

Chapter 5: Cogging torque of permanent magnet motors

Section 1: Methods for analyzing the cogging torque of surface-type permanent magnet motors based on the energy method

I. Mechanisms for generating the cogging torque

II. Analytical analysis of the cogging torque

III. Cogging torque weakening methods of surface-type permanent magnet motors

IV. Combination of the pole number and slots, slant poles and slant slots on cogging torque

Section 2: Cogging torque weakening method based on pole-arc coefficient selection

I. Cogging torque analysis of parallel magnetized tile-shaped pole permanent magnet motor

II. Cogging torque weakening method based on pole-arc coefficient selection

Section 3: Cogging torque weakening method based on unequal slot width fit of permanent magnet motor

Section 4: Cogging torque weakening method of surface-type permanent magnet motor

V. Cogging torque weakening method based on unequal slot width fits

I. Analytical expression of cogging torque when unequal slot width fits are used

II. Cogging torque weakening method based on unequal slot width fits

III. Calculation example

Section IV. Cogging torque weakening method based on magnetic pole offset

I. Expression of cogging torque when the magnetic pole is offset

II. Determination of magnetic pole offset angle

Section 5: Cogging torque weakening method based on unequal thickness of permanent magnet poles

I. Unequal thickness of magnetic pole structure

II. torque expression for different combinations of polar arc coefficients

II. Determination of the combination of polar arc coefficients

Section VII: Cogging torque weakening method based on auxiliary slots

I. Cogging torque expression with auxiliary slots

II. Selection of auxiliary slots

Section VIII: Influence of the static eccentricity of the rotor on cogging torque of a surface-type permanent-magnet motor

I. Influence of the eccentricity of the rotor on the Effect of rotor eccentricity on air gap density distribution

II. Analytical analysis of cogging torque in rotor eccentricity

III. Effect of eccentricity on cogging torque

Section IX. Cogging torque of asynchronous starting permanent magnet synchronous motor

I. Analytical analysis of cogging torque

II. Characteristics of cogging torque

III. Effect of slanting slot on cogging torque

Section X. Cogging torque and its weakening of internal rotor permanent magnet brushless motor

I. Cogging torque and its weakening of surface-type internal rotor brushless motor

II. Cogging torque and its weakening of built-in-type internal rotor permanent magnet brushless motor

Chapter VI Permanent Magnet Direct Current Motors

Section I. Structure of Permanent Magnet Direct Current Motors

Section III. p>I. Magnetic pole structure

II. Armature structure

Section 2: Basic equations of permanent magnet DC motor

I. Voltage balance equation

II. Induced electromotive force

III. Electromagnetic torque

IV. Electromagnetic power

V. Power balance equation

VI. p>

VII. Electromagnetic Parameters

Section III: Operating Characteristics of Permanent Magnet DC Motor

I. Speed Characteristics

II. Torque Characteristics

III. Mechanical Characteristics

IV. Efficiency Characteristics

Section IV: Armature Reaction of Permanent Magnet DC Motor

I. Magnetokinetic Momentum in the Air Gap and Magnetic Field under Load

II. p>

Second, the alternating-axis armature reaction and straight-axis armature reaction

Third, the effect of armature reaction on the operation of the motor

Fourth, the armature reaction of the maximum demagnetization of the working point of the permanent magnets

Second, the permanent magnet dc motor speed regulation

One, the armature circuit series resistance speed regulation

Third, the change of the main magnetic flux speed regulation

three Changing voltage speed regulation

Section 6: Permanent magnet DC motor with auxiliary pole

I. Structure and working principle of permanent magnet DC motor with auxiliary pole

II. Performance characteristics of permanent magnet DC motor with auxiliary pole

III. Practical application

Section 7: Electromagnetic design of permanent magnet DC motor

I. DC motor rated data and performance indicators

II. Determination of the main dimensions

III. Determination of the size of the permanent magnets

IV. Selection of the number of poles

V. Design of armature punches

VI. Commutator and brushes

VII. Checking of commutation conditions

Section VIII of the PMDC motor calculation examples

VII. p>

Chapter VII Permanent Magnet Brushless DC Motor

Section 1 Working Principle and Structure of Permanent Magnet Brushless DC Motor

I. Working Principle

II. Structure of Permanent Magnet Brushless DC Motor

Section 2 Conventional Calculation Methods of Working Characteristics of Permanent Magnet Brushless DC Motor

I. Calculations of Characteristics of Permanent Magnet Brushless DC Motor Based on Square Wave

I. Calculations of Characteristics of Permanent Magnet Brushless DC Motor based on Square Wave

I. Characteristic calculation of permanent magnet brushless DC motor based on sine wave

Section 3: Analytical calculation of air gap magnetic field of permanent magnet brushless DC motor

I. Analytical calculation model of air gap magnetic field of surface-type permanent magnet brushless DC motor

II. Example of analytical calculation of permanent magnet field

III. Calculation of no-load electromotive force

Section 4: Calculation of armature reactive magnetic field and phase winding inductance parameters

I. Analytical calculation of armature reactive magnetic field

II. Calculation of winding inductance parameters

Section 5: Field-circuit coupling model of permanent magnet brushless DC motor

I. Field-circuit coupling model of permanent magnet brushless DC motor

II. Example of calculating the field-circuit coupling of permanent magnet brushless DC motor

Section 6: Electromagnetic Performance Calculation of Permanent Magnet Brushless DC Motor Based on Field-Circuit Coupling

I. Calculation Method of Electromagnetic Performance of Permanent Magnet Brushless DC Motor Based on Field-Circuit Coupling

II. Characterization Calculation

III. Calculation Example

Section 7: Torque Fluctuation of Permanent Magnet Brushless DC Motor

I. Overview of Torque Fluctuation of Permanent Magnet Brushless DC Motor

II. Analysis of commutation torque fluctuation

Section VIII: Design features of permanent magnet brushless DC motor

I. Determination of operating mode

II. Selection of electromagnetic load

III. Determination of the number of poles and slots

Section IX: Controller of permanent magnet brushless DC motor

I, Inverter switching circuit

II. Driving circuit

III. Control circuit

IV. Examples of controllers

Section X. Position-sensor-less control of permanent magnet brushless DC motor

I. Position detection method of position-sensor-less control technology

II. Position-sensor-less brushless DC motor based on special chip Control

Three, five position sensor permanent magnet brushless DC motor control schematic diagram

Chapter VIII asynchronous starting permanent magnet synchronous motor

Section 1, the structure and characteristics of asynchronous starting permanent magnet synchronous motor

I, the structure of the asynchronous starting permanent magnet synchronous motor

Two, rotor pole structure of the asynchronous starting permanent magnet synchronous motor

Third, the rotor magnetic circuit structure selection principle

Fourth, the characteristics of asynchronous starting permanent magnet synchronous motor

Section two of the asynchronous starting permanent magnet synchronous motor of the basic electromagnetic relations

One, the speed of rotation

Two, the coefficient related to the magnetic field of the air gap

Three, the alternating shaft armature reaction reactance

Three, the induced Electric potential

V. Phase diagram of permanent magnet synchronous motor

VI. Electromagnetic torque of permanent magnet synchronous motor

VII. V-curve of permanent magnet synchronous motor

Section III. Calculation of operating characteristics of asynchronous starting permanent magnet synchronous motor

I. Calculation of losses

II. The starting process and starting performance calculation of permanent magnet synchronous motor

I. Magnetic field in the starting process

II. Torque analysis in the starting process

III. Calculation of average torque in the starting process

IV. Simulation of the starting process

V. Definition and determination of starting torque

Section V. Technical measures to improve the performance of permanent magnet synchronous Technical Measures to Improve the Performance of Permanent Magnet Synchronous Motors

I. Measures to Improve the Starting Torque

II. Measures to Improve the Power Factor

III. Measures to Improve the Efficiency and to Expand the Range of Economical Operation

Section VI: Sensitivity Analysis of Permanent Magnet Synchronous Motors Performance

I. Influence of Applied Voltage

II. Influence

III. Influence of ambient temperature

Section VII. Electromagnetic design of asynchronous starting permanent magnet synchronous motor

I. Rated data and main performance indexes of asynchronous starting permanent magnet synchronous motor

II. Determination of size of stator punches and length of air gap

III. Design of stator winding

IV. Design of permanent magnet synchronous motor for oilfield pumping machine

I. Characteristics of motor for oilfield pumping machine

II. Design guidelines for permanent magnet synchronous motor for oilfield pumping machine

III. Synchronous motor calculation examples

Chapter 9 speed-regulating permanent magnet synchronous motor

Section 1, the basic structure and mathematical model of speed-regulating permanent magnet synchronous motor

I. Basic structure of speed-regulating permanent magnet synchronous motor

II. mathematical model of speed-regulating permanent magnet synchronous motor

Section 2, speed-regulating permanent magnet synchronous motor vector control

I. Principle of vector control

II. Current control strategy of permanent magnet synchronous motor

III. Vector control system of speed-regulating permanent magnet synchronous motor

Section III. Power characteristics of vector-controlled permanent magnet synchronous motor and analysis of the weak magnetic speed expansion ability

I. Analysis of vector-controlled speed-regulating permanent magnet synchronous motor's performance

Third, the power characteristics of permanent magnet synchronous motor maximum input power weak magnetic control

Fourth, the improvement of permanent magnet synchronous motor weak magnetic speed expansion ability

Fifth, the influence of other factors on the power characteristics and weak magnetic speed expansion ability

Section 4 speed control permanent magnet synchronous motor Calculation method of inductance parameters of motor

I. Calculation method of inductance of alternating and direct axis

II. Influence of alternating and direct axis currents on inductance of alternating and direct axis

Section V. Realization of vector control operation of speed-regulated permanent magnet synchronous motor

I. Overview of the drive system

II. Selection and mounting of position sensors

III, Sampling of position and speed

IV. Software design of permanent magnet synchronous motor control system

Section VI: Direct torque control of speed-regulated permanent magnet synchronous motor

I. Overview

II. Torque equations of permanent magnet synchronous motor in the M-T coordinate system

III. Stator magnetic chain control based on stator phase voltage vector

IV. Implementation of direct torque control system for permanent magnet synchronous motor

Section VII: Design of speed-regulated permanent magnet synchronous motor

I. Selection of main dimensions and air gap

II. Selection of rotary magnetic circuit structure

III. Selection and design of permanent magnets

IV. Optimization of the air gap magnetic density waveform

V. Suppression of cogging torque and improvement of low-speed Improvement of smoothness

Chapter 10: Permanent magnet motors with special structure

Section I: Transverse flux permanent magnet motor

I: Structure and working principle of transverse flux permanent magnet motor

II: Characteristics of transverse flux permanent magnet motor

III: Classification of transverse flux permanent magnet motor

IV: Typical examples of transverse flux permanent magnet motor

The second section is the following

Section 2: HALBACH Magnet Structure Permanent Magnet Motors

I. HALBACH Magnet Structure

II. Comparison of Magnetic Fields between HALBACH Magnet Structure Motors and Conventional Magnet Structure Motors with Conducting Magnet Core

III. Comparison

Fourth, HALBACH magnet structure permanent magnet motor test

Fifth, other forms of HALBACH magnet structure

Fifth, HALBACH magnet structure motor applications

Third section of the permanent magnet high-speed motors

One, permanent magnet high-speed motor structure and design characteristics

Second, high-speed Motor Examples

Section IV Memory Motors

I. Variable Flux Memory Motors

II. Variable Pole Memory Motors

Section V Double Convex Pole Permanent Magnet Motors

I. Structural Characteristics

II. Operating Principle

III. Permanent magnet synchronous motor

I. Structure

II. Basic working principle

III. Steering control

IV. Application examples

Section VII. Write-pole motors

I.

Four, single-phase write-pole motor

Appendix

Appendix A wire specification table

Appendix B magnetization curve of the magnetizing material and loss curve chart

Appendix C commonly used stator, rotor slot ratio of the leakage of magnetic permeability calculation