Electrical Networks - 1st Edition - ISBN: 9780713136371, 9781483280110

Electrical Networks

1st Edition

Authors: A. Henderson
eBook ISBN: 9781483280110
Imprint: Arnold
Published Date: 1st January 1975
Page Count: 416
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Electrical Networks focuses on the principles, methodologies, practices, and approaches involved in electrical networks, including transformers, polarity, Zobel networks, and Fourier series. The book first elaborates on d.c. currents and voltages and varying currents and voltages. Discussions focus on voltage and current sources, energy and power, voltage and current division, star-delta transformation, direction and polarity, periodical quantities, capacitors and inductors, and energy stored in capacitors and inductors. The manuscript then takes a look at some properties of networks and magnetic coupled inductors. Topics include equivalent circuits for magnetic coupled coils, voltage and the current transformer, mutual induction, impedance transformation, current direction, voltage polarity and the mode of winding, polar diagrams, resonance, and Zobel networks. The publication examines networks containing switches, complex frequency, and Fourier series. Considerations include frequency spectrum, finite Fourier series, capacitor discharges over a resistor, natural oscillations, and discontinuity. The monograph is a valuable source of information for electricians and researchers interested in electrical networks.

Table of Contents




1 D.C. Currents and D.C. Voltages

1.1 Current, Potential, Voltage and Resistance

1.2 The Voltage Source and the Current Source

1.3 Energy and Power

1.4 Connection of Resistors

1.5 Voltage and Current Division

1.6 The Solution of Larger Networks

1.7 The Mesh Method

1.8 The Node Method

1.9 The Current Law for a Cut-Set

1.10 Superposition

1.11 Tellegen’s Theorem

1.12 Two-Ports

1.13 Thévenin’s and Norton’s Theorems

1.14 Maximum Power Transfer

1.15 Star-Delta Transformation

1.16 Controlled Sources

1.17 Transactors

1.18 Special Networks

1.19 Thévenin’s Theorem in Networks with Transactors

1.20 The Operational Amplifier

1.21 Problems

2 Varying Currents and Voltages

2.1 Introduction

2.2 Direction and Polarity

2.3 Kirchhoff’s Laws and Ohm’s Law

2.4 Periodical Quantities

2.5 Average Value

2.6 Power

2.7 Effective Value

2.8 Sinusoidal Quantities

2.9 Power for Sinusoidal Voltages and Currents

2.10 The Sum of Two Sinusoidal Quantities

2.11 The Capacitor

2.12 The Inductor

2.13 Energy Stored in Capacitor and Inductor

2.14 The Passive Elements in Sinusoidal Excitation

2.15 A Larger Network in Sinusoidal Excitation

2.16 Complex Numbers

2.17 Operations with Complex Numbers

2.18 Complex Voltages and Currents

2.19 Kirchhoff’s Laws for Complex Quantities

2.20 The Complex → Time Transformation

2.21 Vector Diagrams

2.22 Complex Power

2.23 Maximum Power Transfer for Complex Quantities

2.24 Problems

3 Some Properties of Networks

3.1 Polar Diagrams

3.2 Bode Diagrams

3.3 Duality

3.4 Resonance

3.5 Lossless One-Ports

3.6 Zobel Networks

3.7 Problems

4. Magnetic Coupled Inductors, Transformers

4.1 Introduction

4.2 Mutual Induction

4.3 Current Direction, Voltage Polarity and the Mode of Winding

4.4 The Value of |M|

4.5 Hopkinson’s Formula

4.6 The Transformer

4.7 Impedance Transformation

4.8 Equivalent Circuits for Magnetic Coupled Coils

4.9 The Voltage and the Current Transformer

4.10 Problems

5 Three-Phase Systems

5.1 The Rotating Field

5.2 The Creation of a Rotating Field

5.3 The Principle of the Three-Phase Motor

5.4 The Principle of the Three-Phase Generator

5.5 The Three-Phase Supply

5.6 Complex Three-Phase Voltages

5.7 The Three-Phase Load

5.8 Power in Three-Phase Systems

5.9 Phase Compensation

5.10 Problems

6 Fourier Series

6.1 Introduction

6.2 The Infinity Series of Fourier

6.3 The Frequency Spectrum

6.4 Dirichlet’s Conditions

6.5 Gibb’s Phenomenon

6.6 The Fourier Series in Complex Form

6.7 The Finite Fourier Series

6.8 Reflections on Symmetry

6.9 The Effective Value of a Fourier Series

6.10 Problems

7 The Complex Frequency

7.1 Introduction

7.2 A Capacitor Discharges Over a Resistor

7.3 A Capacitor Discharges Over an Inductor with Series Resistor

7.4 The Complex Frequency Plane

7.5 Extension of the Meaning of Impedance

7.6 Kirchhoff’s Laws if the Frequency is Complex

7.7 Poles and Zeros

7.8 Frequency Characteristics

7.9 The Coincidence of Poles and Zeros

7.10 The Order of a Network

7.11 Natural Oscillations of a One-Port

7.12 The Location of the Poles and Zeros for an Immitance

7.13 The Number of Poles for an Immittance

7.14 Poles and Zeros on the Imaginary Axis

7.15 The Amplitude Surface

7.16 Problems

8 Two-Ports, Filters

8.1 Introduction

8.2 Two-Port Matrices

8.3 Interconnection of Two-Ports

8.4 Reciprocity

8.5 Restoring the Port Condition

8.6 Poles and Zeros of a Transfer Function

8.7 Once More the Operational Amplifier (Opamp)

8.8 The Realisation of Differential Equations

8.9 Filters

9.10 Problems

9 Networks Containing Switches

9.1 Introduction

9.2 Discontinuity

9.3 The Continuity Theorem

9.4 Initial Conditions

9.5 A Second-Order Transient Problem

9.6 Natural Oscillations

9.7 The Impulse Function

9.8 Sine and Cosine Functions with Decreasing Amplitude

9.9 Summarising Example

9.10 Conclusion

9.11 Problems

10 Computer Aided Analysis

10.1 Introduction

10.2 The NA-Matrix

10.3 The Concept ‘Stamp’

10.4 The MNA-Matrix

10.5 Outline of the Stamps

10.6 Earthing a Terminal

10.7 Connecting Two Terminals

10.8 A Terminal Becomes an Internal Node

10.9 Examples

10.10 The Solution of the Matrix Equation

10.11 Numerical Integration

10.12 Equivalent Circuits

10.13 Nonlinear Elements

10.14 Problems


Appendix I Linearity and Superposition

Appendix II Tellegen’s Theorem

Appendix III Reciprocity

Appendix IV Thévenin’s and Norton’s Theorems

Appendix V Star-Delta Transformation

Appendix VI Foster’s Theorem

Answers to Problems



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© Arnold 1990
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About the Author

A. Henderson