書????名 | 電機原理及驅動 | 作????者 | 查普曼 (Stephen J.Chapman) |
---|---|---|---|
類????型 | 科技 | 出版日期 | 2013年6月1日 |
語????種 | 英語, 簡體中文 | ISBN | 9787302322481 |
品????牌 | 清華大學出版社 | 外文名 | Electric Machinery Fundamentals(Fifth Edition) |
譯????者 | 滿永奎 | 出版社 | 清華大學出版社 |
頁????數 | 534頁 | 開????本 | 16 |
定????價 | 69.00 |
Chapter 1 Introduction to Machinery Principles
1.1 Electrical Machines, Transformers, and Daily Lite
1.2 Rotational Motion, Newton's Law, and Power Relationships Angular Position θ / Angular Velocity ω / Angular Acceleration α / Torque τ / Newton's Law of Rotation / Work W/Power P
1.3 The Magnetic Field
Production of a Magnetic Field / Magnetic Circuits / Magnetic Behavior of Ferromagnetic Materials / Energy Losses in a Ferromagnetic Core
1.4 Faraday's Law——Induced Voltage from a Time—Changing Magnetic Field
1.5 Production of Induced Force on a Wire
1.6 Induced Voltage on a Conductor Moving in a Magnetic Field
1.7 Real, Reactive, and Apparent Power in Single—Phase AC Circuits Alternative Forms of the Power Equations / Complex Power / The Relationships between Impedance Angle, Current Angle, and Power / The Power Triangle
1.8 Summary
Questions
Problems
References
Chapter 2 Transformers
2.1 Why Transformers Are Important to Modern Life
2.2 Types and Construction of Transformers
2.3 The Ideal Transformer
Power in an Ideal Transformer/Impedance Transformation through a Transformer / Analysis of Circuits Containing Ideal Transformers
2.4 Theory of Operation of Real Single—Phase Transformers The Voltage Ratio across a Transformer / The Magnetization Current in a Real Transformer / The Current Ratio on a Transformer and the Dot Convention
2.5 The Equivalent Circuit of a Transformer The Exact Equivalent Circuit of a Real Transformer / Approximate Equivalent Circuits of a Transformer / Determining the Values of Components in the Transformer Model
2.6 The Per—Unit System of Measurements
2.7 Transformer Voltage Regulation and Efficiency The Transformer Phasor Diagram / Transformer Efficiency
2.8 Transformer Taps and Voltage Regulation
2.9 The Autotransformer
Voltage and Current Relationships in an Autotransformer / The Apparent Power Rating Advantage of Autotransformers / The Internal Impedance of an Autotransformer
2.10 Three—Phase Transformers
Three—Phase Transformer Connections / The Per— Unit System for Three—Phase Transformers
2.11 Transformer Ratings and Related Problems
The Voltage and Frequency Ratings of a Transformer / The Apparent Power Rating of a Transformer / The Problem of Current Inrush / The Transformer Nameplate
2.12 Instrument Transformers
2.13 Summary
Questions
Problems
References
Chapter 3 AC Machinery Fundamentals
3.1 A Simple Loop in a Uniform Magnetic Field The Voltage Induced in a Simple Rotating Loop / The Torque Induced in a Current—Carrying Loop
3.2 The Rotating Magnetic Field Proof of the Rotating Magnetic Field Concept / The Relationship between Electrical Frequency and the Speed of Magnetic Field Rotation / Reversing the Direction of Magnetic Field Rotation
3.3 Magnetomotive Force and Flux Distribution on AC Machines
3.4 Induced Voltage in AC Machines
The Induced Voltage in a Coil on a Two—Pole Stator / The Induced Voltage in a Three—Phase Set of Coils / The RMS Voltage in a Three—Phase Stator
3.5 Induced Torque in an AC Machine
3.6 Winding Insulation in an AC Machine
3.7 AC Machine Power Flows and Losses
The Losses in AC Machines / The Power—Flow Diagram
3.8 Voltage Regulation and Speed Regulation
3.9 Summary
Questions
Problems
References
Chapter 4 Synchronous Generators and Motors
4.1 Synchronous Generator Construction
4.2 The Speed of Rotation of a Synchronous Generator
4.3 The Internal Generated Voltage of a Synchronous Generator
4.4 The Equivalent Circuit of a Synchronous Generator
4.5 The Phasor Diagram of a Synchronous Generator
4.6 Power and Torque in Synchronous Generators
4.7 Measuring Synchronous Generator Model Parameters
The Short—Circuit Ratio
4.8 Synchronous Generator Ratings
The Voltage, Speed, and Frequency Ratings / Apparent Power and Power—Factor Ratings / Synchronous Generator Capability Curves / Short—Time Operation and Service Factor
4.9 Basic Principles of Motor Operation
The Equivalent Circuit of a Synchronous Motor / The Synchronous Motar from a Magnetic Field Perspective
4.10 Steady—State Synchronous Motor Operation
The Synchronous Motor Torque—Speed Characteristic Curve / The Effect of Load Changes on a Synchronous Motor / The Effect of Field Current Changes on a Synchronous Motor / The Synchronous Motor and Power—Factor Correction / The Synchronous Capacitor or Synchronous Condenser
4.11 Starting Synchronous Motors
Motor Starting by Reducing Electrical Frequency / Motor Starting with an External Prime Mover / Motor Starting by Using Amortisseur Windings / The Effect of Amortisseur Windings on Motor Stability
4.12 Synchronous Generators and Synchronous Motors
4.13 Synchronous Motor Ratings
4.14 Summary
Questions
Problems
References
Chapter 5 Induction Motors
5.1 Induction Motor Construction
5.2 Basic Induction Motor Concepts
The Development of Induced Torque in an Induction Motor / The Concept of Rotor Slip / The Electrical Frequency on the Rotor
5.3 The Equivalent Circuit of an Induction Motor
The Transformer Model of an Induction Motor / The Rotor Circuit Model / The Final Equivalent Circuit
5.4 Power and Torque in Induction Motors
Losses and the Power—Flow Diagram / Power and Torque in an Induction Motor / Separating the Rotor Copper Losses and the Power Converted in an Induction Motor's Equivalent Circuit
5.5 Induction Motor Torque—Speed Characteristics
Induced Torque from a Physical Standpoint/The Derivation of the Induction Motor Induced—Torque Equation / Comments on the Induction Motor Torque—Speed Curve / Maximum (Pullout) Torque in an Induction Motor
5.6 Variations in Induction Motor Torque—Speed Characteristics
Control of Motor Characteristics by Cage Rotor Design / Deep—Bar and Double—Cage Rotor Designs / Induction Motor Design Classes
5.7 Trends in Induction Motor Design
5.8 Starting Induction Motors
Induction Motor Starting Circuits
5.9 Speed Control of Induction Motors
Induction Motor Speed Control by Pole Changing / Speed Control by Changing the Line Frequency / Speed Control by Changing the Line Voltage / Speed Control by Changing the Rotor Resistance
5.10 Solid—State Induction Motor Drives
Frequency (Speed) Adjustment / A Choice of Voltage and Frequency Patterns / Independently Adjustable Acceleration and Deceleration Ramps / Motor Protection
5.11 Determining Circuit Model Parameters
The No—Load Test / The DC Test for Stator Resistance / The Locked—Rotor Test
5.12 The Induction Generator
The Induction Generator Operating Alone / Induction Generator Applications
5.13 Induction Motor Ratings
5.14 Summary
Questions
Problems
References
……
Chapter 6 DC Machinery Fundamentals
Chapter 7 DC Motors and Generators
Chapter 8 Single—Phase and Special—Purpose Motors
Appendix A Tables of Constants and Conversion Factors
Appendix B Glossary
Chapter 1 Introduction to Machinery Principles
Chapter 2 Transformers
Chapter 3 AC Machinery Fundamentals
Chapter 4 Synchronous Generators and Motors
Chapter 5 Induction Motors
Chapter 6 DC Machinery Fundamentals
Chapter 7 DC Motors and Generators
Chapter 8 Single-Phase and Special-Purpose Motors
Appendix A Three-Phase Circuits
Appendix B Coil Pitch and Distributed Windings
Appendix C Salient-Pole Theory of Synchronous Machines
Appendix D Tables of Constants and Conversion Factors2100433B
《電機原理及驅動:電機學基礎(第5版)》為了便于讀者理解,編譯者增加了“詞匯”和“導讀”部分。在“詞匯”部分,側重點是專業(yè)詞匯,給出了相對應的漢語術語。盡管穿插在書中各節(jié)列出了一些詞匯,但是,為了讀者查閱方便,在最后附錄中,還按字母順序列出了總的漢英對照詞匯表。《電機原理及驅動:電機學基礎(第5版)》可以作為高等學校電氣工程和自動化專業(yè)本科生的專業(yè)基礎課雙語教材和研究生教材,也可以作為電氣工程和自動化領域工程技術人員的技術參考書。
作者:(美國)查普曼(Stephen J.Chapman) 譯者:滿永奎
雙速電動機屬于異步電動機變極調速,是通過改變定子繞組的連接方法達到改變定子旋轉磁場磁極對數,從而改變電動機的轉速。根據公式;n1=60f/p可知異步電動機的同步轉速與磁極對數成反比,磁極對數增加一倍,...
伺服電機的定子和轉子由永磁體或鐵芯線圈構成。永磁體產生磁場,而鐵芯線圈通電后也會產生磁場。定子磁場和轉子磁場相互作用產生力矩,使電機帶動負載運動,從而通過磁的形式將電能轉換為機械能。電機的基本運動方程...
電機與拖動:了解電機的工作原理,研究如何控制電機的啟動、穩(wěn)速、調速和制動等電 機 學:研究電機的工作原理、設計和制造工藝等
《電機原理及驅動:電機學基礎(第4版)》可供各大專院校作為教材使用,也可供從事相關工作的人員作為參考用書使用。
格式:pdf
大?。?span id="sbauine" class="single-tag-height">575KB
頁數: 3頁
評分: 4.6
1.繞組從單星形改接成雙星形,如下圖(左)所示。當用這種接線方式時,電動機由 Y接改 為 YY連接,每相的繞組均由串聯改為并聯,這樣使磁極對數較少了一般。利用這種換接法, 電動機在變極調速后,其額定轉矩基本上保持不變,所以適合與拖動恒轉矩性質的負載,力 圖起重機和皮帶傳輸機等。 2.繞組從三角形改成雙星形( Y形),如上圖(右)所示三角形改為雙星形,也使磁極對數 減小一半,而得到調速效果。這種變極調速后,電動機的額定功率基本上不變,但是額定轉 矩幾乎要減小一半,所以這種接法適合用于拖動恒功率性質的負載,如各種金屬切削機床。 當利用磁極對數的變換對三相 異步電動機 進行調速時,由于改接后繞組旋轉磁場的旋轉方向 不會改變,在改變極數時,應把接到電動機進線端子上的 電源的相序變一下。 雙速電機雙星接線圖 你數每極每相有多少個槽就可以了, 再用總槽數除以相數, 再除以剛才數的每極每相的槽數, 就是
格式:pdf
大小:575KB
頁數: 10頁
評分: 4.6
第 3 章 3.1 三相變壓器組和三相心式變壓器在磁路結構上各有什么特點? 答:三相變壓器組磁路結構上的特點是各相磁路各自獨立, 彼此無關;三相 心式變壓器在磁路結構上的特點是 各相磁路相互影響 ,任一瞬間某一相的磁通均 以其他兩相鐵心為回路。 3.2三相變壓器的聯結組是由哪些因素決定的? 答:三相變壓器的 聯結組是描述高、低壓繞組對應的線電動勢之間的相位差 , 它主要與( 1)繞組的極性(繞法)和首末端的標志有關; (2)繞組的連接方式 有關。 3.4 Y,y接法的三相變壓器組中,相電動勢中有三次諧波電動勢,線電動勢 中有無三次諧波電動勢?為什么? 答:線電動勢中沒有三次諧波電動勢, 因為三次諧波大小相等, 相位上彼此 相差 00 3601203 ,即相位也相同 。當采用 Y,y 接法時,線電動勢為兩相電 動勢之差,所以線電動勢中的三次諧波為零。 以 BA, 相為例,三次諧波電動勢表
《自動化專業(yè)系列教材:電機學與拖動基礎(第2版)》取材豐富、結構嚴謹、重點突出、系統(tǒng)性強;各章相對獨立,便于讀者取舍。每章配有例題,附有足夠數量的思考題與習題。
《自動化專業(yè)系列教材:電機學與拖動基礎(第2版)》第一版是自控、船電類專業(yè)本科《電機學與拖動基礎》課程用的“九五”規(guī)劃部委級重點教材?!蹲詣踊瘜I(yè)系列教材:電機學與拖動基礎(第2版)》為第二版,內容有增刪,部分內容的安排作了調整,可供新專業(yè)目錄的高等學校本科自動化專業(yè)、電氣工程及其自動化專業(yè)、機械電子工程專業(yè)和其他相關專業(yè)使用,亦可作職業(yè)技術學院、專科、成人高等教育同類專業(yè)的教材,還可供有關工程技術人員參考。
電工與電機學基礎定 價:¥32.00
作 者:林文孚 主編
出 版 社:水利水電出版社
出版時間:2011-8-1
開 本:16開
I S B N:9787508489674
全書共分五章,即直流電機(含直流電動機的拖動) 、變壓器、交流旋轉電機的共同問題、異步電機(含異步電動機的拖動)和同步電機。每一章分若干節(jié),內容主要是各種電機的原理、結構、特性和應用以及拖動基礎,每章分基本知 識點、重點與難點、典型題解析和自我檢測題四部分。附錄中收錄了西安交通大學近年來本科生的電機學期末考試題、碩士研究生入學考試題以及練習題的答案(部分習題有解題過程 )?!峨姍C學(含拖動基礎)學習指導典型題解》可作為大學本科生、??粕鷮W習電機學(含拖動)課程的輔導教材;其基本內容作為 高等教育自學考試以及成人高等教育的該課程的自學指導書也很適合;也可作為有關碩士研 究生報考相關專業(yè)的復習參考書。