توضیحاتی در مورد کتاب :
DELMAR، CENGAGE LEARNING و کمیته ملی کارآموزی و آموزش مشترک (NJATC) مفتخرند که سومین ویرایش از سری کتاب های متنی/مرجع آموزش کارآموزی را ارائه دهند. NJATC برای انجمن ملی پیمانکاران برق (NECA) و برادری بین المللی کارگران برق (IBEW) که بیش از 800000 کارگر را در زمینه های مختلف در سراسر آمریکای شمالی نمایندگی می کنند، آموزش ایجاد و استاندارد می کند. تمرکز تمامی برنامه های NJATC و تمرکز این مجموعه آموزشی بر مهارت ها، نگرش و دانش است.
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طراحی شده برای ارائه یک مقدمه کامل از تئوری جریان متناوب (AC) و مشخصات مدار به خوانندگان،
تئوری AC، نسخه سوم، پیچیدگیهای این نظریه الکتریکی پیشرفتهتر را با تکیه بر اصول پایهگذاری شده در نظریه DC، ویرایش سوم، بررسی میکند. این کتاب با مروری بر تئوری الکترون، مغناطیس و تولید موج سینوسی AC آغاز میشود، سپس به تدریج موضوعات پیچیدهتری مانند راکتانس القایی و خازنی در مدارهای AC موازی، سری و ترکیبی و اثرات آنها بر روابط فاز AC را معرفی میکند. و عوامل قدرت با همان رویکرد خواننده پسند و مثالهای عملی که نسخههای قبلی را بسیار موفق کرده است، این نسخه بهروز شده از جدیدترین فناوریها و گرایشها استفاده میکند تا منبعی ایدهآل برای هر کسی که به دنبال دانش بنیادی نظریه AC است ارائه کند.
فهرست مطالب :
Table of Contents
1 - Introduction to Alternating Current
Electron Theory
Conductors, Insulators, and Semiconductors
Ohm\'s Law
DC Circuit Analysis
Voltage Drop in Wire
Permanent Magnets
Magnetism, Conductors, and Movement
Summary
Review Questions
2 - Production of the AC Sine Wave
AC Generators
Instantaneous Value of a Sine Wave
AC Sine Wave Measurements
Construction of AC Generators
Revolving Armature AC Generators
Alternator Construction
Revolving Field AC Generators
Generator Excitation
Multiple-Pole Generators
Summary
Review Questions
3 - Inductors, Self-Induction, Inductive Reactance, and Impedance
Inductance
Inductors
Theory of Self-Induction
Lenz\'s Law
Henry
Physical Factors Affecting Inductance
Inductive Reactance
Lagging Current
Impedance
Summary
Review Questions
4 - Resistors and Inductors in Series
Inductors Connected in Series
Inductors with Aiding or Opposing Fields
Impedance of an Inductor
Q of a Coil
Resistors and Coils in Series
Total Z, E, and I and Component Z, E, and I in a Series Circuit
Power Factor, Phase Angle, and Watts in a Series Circuit
Types of Power
Variations in Circuit Values
Rise Time of Inductor Current
Exponential Rates and Time Constants
Summary
Review Questions
5 - Capacitors, Capacitance, and Capacitive Reactance
Capacitance
Capacitance Formulas
Capacitor Construction and Ratings
Theory of Capacitive Action
Electrostatic Charge
Voltage and Current Relationship in a Capacitor
Capacitors and Current
Voltage Ratings
Dielectric Characteristics
Number of Plate Interactions
Capacitor Types
Testing Capacitors
Charge and Discharge Rates
Capacitive Reactance
Calculating Capacitance from Capacitive Reactance
Summary
Review Questions
6 - Capacitors and Resistors in Series
Capacitors in Series
Series Capacitor Formulas
Capacitive Reactance in Series
Resistive Capacitive Series Circuits
Impedance
Calculating Voltage Drops for Series RC Components
Impedance and Voltage Triangles for RC Circuits
Power
The Effects of Changing Variables on RC Circuits
Summary
Review Questions
7 - Series RLC Circuits
Series RLC Circuit Analysis
Frequency Effects and Series Resonance
Series Circuit with Coil Resistance
Summary
Review Questions
8 - Parallel RL Circuits
Review of Parallel Circuit Laws
Inductors Connected in Parallel
Inductive Reactance in Parallel
Pure Inductors and Resistors in Parallel
Coils with Impedance in Parallel with Resistors
Current, Impedance, Voltage, and Power
Multiple Coils with Wire Resistance and Resistors in Parallel
Summary
Review Questions
9 - Parallel RC Circuits
Capacitors in Parallel
Capacitive Reactance in Parallel
Parallel RC Circuits
Circuit Values
Voltage
Power in Parallel RC Circuits
Power Factor
Angle Theta
Multiple Resistors and Capacitors in Parallel
Effects on Changing Circuit Variables
Summary
Review Questions
10 - Parallel RLC Circuits
Parallel RLC Circuits
Calculating Parallel RLC Circuit Values
Total Circuit Calculations
Power Calculations
Power Factor
Angle Theta
Determining Impedance Using the Assumed Voltage Method
Parallel Resonant Circuits
Summary
Review Questions
11 - Combination RLC Circuits
Combination RLC Circuits
Circuit Analysis: Resistance, Inductance, and Capacitance
Circuit Total Vector Addition
Voltage Drop Calculations for Combination Circuits
Power Calculations
Series Circuits in Parallel
Power Factor Correction
Complex Circuit Evaluation
Forensic Evaluation
Summary
Review Questions
12 - AC Filter Circuits
Filter Operation and Classification
Low-Pass Filters
High-Pass Filters
Band-Pass Filters
Band-Reject Filters
Complex Filters
Summary
Review Questions
13 - Generators
Induction by Magnetism
Generator Characteristics
Sine Wave Generation and Conversion to DC
Major Generator Components
Generator Connection Types
Generator Losses
Armature Reaction
Paralleling DC Generators
AC Generator Principles of Operation
Construction of AC Generators
Rotor Construction
Excitation Systems
Generator Cooling
Frequency and Output Voltage
Output Voltage, Frequency, and Power
Paralleling AC Generators
Summary
Review Questions
14 - AC Motors
Motor Action
Single-Phase AC Motors
Synchronous Speed
Induction Motor
Motor Variations
Three-Phase Motors
Three-Phase Induction Motor
Generator Effect in a Motor
Variable Frequency Drives
Summary
Review Questions
15 - Transformers
Principles of Transformation
Voltage, Current, and Power Characteristics
Calculations for Primary and Secondary Windings
Characteristics of Transformer Operation
Transformer Impedance
Transformer Lead Marking
Single-Phase Transformer Connections
Multi-Coil Transformers
Three-Phase Transformer Connections
Summary
Review Questions
Appendix A - Mathematics: Using Vectors Effectively
Glossary
Index
توضیحاتی در مورد کتاب به زبان اصلی :
DELMAR, CENGAGE LEARNING and the NATIONAL JOINT APPRENTICESHIP AND TRAINING COMMITTEE (NJATC) are proud to present the third edition of our series of apprenticeship training text/reference books. The NJATC develops and standardizes training for the National Electrical Contractors Association (NECA) and the International Brotherhood of Electrical Workers (IBEW), which represent more than 800,000 workers in a variety of fields throughout North America. The focus of all NJATC programs, and the focus of this training series, is on skills, attitude, and knowledge.
Written by education professionals to the specifications provided by NJATC's industry experts, each book in this series is carefully written to build knowledge through a wealth of illustrations, real-world situations, and step-by-step examples and procedures. NJATC-affiliated programs have trained over 300,000 electrical workers, and safety is always emphasized throughout all training materials. This series reflects the experience gained from tremendous effort.
Designed to provide readers with a thorough introduction to alternating current (AC) theory and circuit characteristics,
AC Theory, 3rd Edition explores the complexities of this more advanced electrical theory by building on the basics established in DC Theory, 3rd Edition. The book begins with an overview of electron theory, magnetism, and the production of the AC sine wave, then progressively introduces more complex subjects such as inductive and capacitive reactance in parallel, series, and combination AC circuits, and their effects on AC phase relationships and power factors. With the same reader-friendly approach and practical examples that made previous editions so successful, this updated edition uses the most current technologies and trends to provide'an ideal resource for anyone seeking a fundamental knowledge of AC theory.