Understandable Electric Circuits
There are many 'Electric Circuits' books on the market but this unique Understandable Electric Circuits book provides an understandable and effective introduction to the fundamentals of DC/AC circuits. It covers current, voltage, power, resistors, capacitors, inductors, impedance, admittance, dependent/independent sources, the basic circuit laws/rules (Ohm's law, KVL/KCL, voltage/current divider rules), series/parallel and wye/delta circuits, methods of DC/AC analysis (branch current and mesh/node analysis), the network theorems (superposition, Thevenin's/Norton's theorems, maximum power transfer, Millman's and substitution theorems), transient analysis, RLC circuits and resonance, mutual inductance, transformers, and more. This book presents material in a clear and easy-to-understand manner. All important concepts, rules and formulas are highlighted after the explanation and are also summarised at the end of each chapter, making it easy to locate important facts and to study more effectively. The laboratory experiments at the end of each chapter are convenient for doing hands-on practice. These will motivate readers to master the circuit theory, especially college and university students or self-learners in this field. The English version of this book continues in the spirit of its successful Chinese version, which was published by Higher Education Press (the largest and most prominent publisher of educational books in China) in 2005 and reprinted in 2009.
Inspec keywords: voltage dividers; RLC circuits; resistors; electric admittance; transient analysis; circuit theory; capacitors; transformers; inductors
Other keywords: Ohm law; DC-AC circuits; Thevenin theorem; substitution theorem; maximum power transfer; Norton theorem; transient analysis; mesh-node analysis; Millman theorem; basic circuit rules; mutual inductance; RLC resonance; inductor; parallel circuits; KVL; current divider rules; KCL; voltage divider rules; electric circuits; capacitor; DC-AC analysis; admittance; branch current; series circuits; transformers; RLC circuits; resistor; impedance; superposition; wye-delta circuits; basic circuit laws; independent sources; network theorems
Subjects: General circuit analysis and synthesis methods; Capacitors; Resistors; Other analogue circuits; Inductors and transformers
- Book DOI: 10.1049/PBCS023E
- Chapter DOI: 10.1049/PBCS023E
- ISBN: 9780863419522
- e-ISBN: 9781849191142
- Page count: 384
- Format: PDF
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Front Matter
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1 Basic concepts of electric circuits
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This chapter is divided into 6 parts. The first part deals with the Introduction. The second part covers electric circuits and schematic diagrams. The third part talks about electric current. The fourth part talks about electric voltage. The fifth part deals with resistance and Ohm's law. The sixth part discusses reference direction of voltage and current.
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2 Basic laws of electric circuits
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This chapter is divided into 5 parts. The first part deals with power and energy. The second part covers Kirchhoff's voltage law (KVL). The third part talks about Kirchhoff's current law (KCL). The fourth part discusses voltage source and current source. The fifth part talks about international units for circuit quantities.
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3 Series-parallel resistive circuits
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After completing this chapter, you will be able to: 1) identify series circuits, parallel circuits and series-parallel circuits 2) know how to determine the equivalent resistance for series, parallel and series-parallel resistive circuits 3) calculate the resistance, voltage, current and power for series, parallel and series-parallel resistive circuits 4) understand and apply the voltage-divider (VDR) and current-divider (CDR) rules 5) identify the wye (Y) and delta (Δ) circuits 6) know the method of wye (Y) and delta (Δ) conversions 7) apply the method of Δ-Y conversions to simplify bridge circuits 8) understand the method for measuring the unknown resistance of a balanced bridge circuit.
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4 Methods of DC circuit analysis
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This chapter discusses the conversion of voltage source to an equivalent current source and vice versa. Know the methods of voltage sources in series and parallel operation and also current sources. Understand the branch current analysis method, mesh analysis method and node voltage analysis method applied to circuit analysis.
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5 The network theorems
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The scientists working in the field of electrical engineering have developed more simplified theorems to analyse these kinds of complex circuits (the com plicated circuit is also called the network). This chapter presents several theo rems useful for analysing such complex circuits or networks. These theorems include the superposition theorem, Thevenin's theorem, Norton's theorem, Millman's theorem and the substitution theorem. In electrical network analysis, the fundamental rules are still Ohm's law and Kirchhoff s laws.
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6 Capacitors and inductors
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This chapter discusses the basic structure of the capacitor and inductor. Explain the charging and discharging behaviours of a capacitor. Presents the storing and releasing energy of an inductor, the meaning and factors affecting capacitance and inductance. The relationship between voltage and current in capacitive and inductive circuits, and also calculates the energy stored in capacitors and inductors. Shows the equivalent capacitance and inductance in series, parallel and series-parallel configurations. Both of these electric elements can store energy that has been absorbed from the power supply, and release it to the circuit. A capacitor can store energy in the electric field, and an inductor can store energy in the magnetic field. This is different with a resistor that consumes or dissipates electric energy.
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7 Transient analysis of circuits
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After completing this chapter, you will be able to: 1) understand the first-order circuits and concepts of the step response and source-free response of the circuits 2) understand the initial conditions in the switching circuit 3) understand the concepts of the transient and steady states of RL and RC circuits 4) determine the charging/discharging process in an RC circuit 5) determine the energy storing/releasing process in an RL circuit 6) understand the concepts of time constants for RL and RC circuits 7) plot the voltages and currents verse time curves for RL and RC circuits 8) understand the relationship between the time constant and the charging/ discharging in an RC circuit 9) understand the relationship between the time constant and the energy storing/releasing in an RL circuit.
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8 Fundamentals of AC circuits
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After completing this chapter, you should be able to: understand the difference between DC and AC; understand the definitions of AC phase shift, period, frequency, peak to peak, peak, RMS values, phasor, etc.; understand the relationship of period and frequency; understand and define three important components of sinusoidal waveform; define the phase difference between sinusoidal voltage and current; convert sinusoidal time-domain quantities to phasor-domain forms, and vice versa; analyse the sinusoidal AC circuits using phasors; and study the effect of resistive, inductive, and capacitive elements in AC circuits.
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9 Methods of AC circuit analysis
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After completing this chapter, you will be able to: understand concepts and characteristics of the impedance and admittance of AC circuits; define the impedance and admittance of resistor R, inductor L and capacitor C; determine the impedance and admittance of series and parallel AC circuits; apply the voltage divider and current divider rules to AC circuits; apply KCL and KVL to AC circuits understand the concepts of instantaneous power, active power, reactive power, apparent power, power triangle and power factor; and apply the mesh analysis, node voltage analysis, superposition theorem and Thevinin's and Norton's theorems, etc. to analyse AC circuits.
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10 RLC circuits and resonance
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After completing this chapter, you will be able to: understand concepts and characteristics of series and parallel resonance; determine the following quantities of series and parallel resonant circuits: resonant frequency, resonant current, resonant voltage, resonant impedance, bandwidth and quality factor; plot the frequency response curves of current, voltage and impedance for series and parallel resonant circuits; understand characteristics of the selectivity in series and parallel of resonant circuits; understand the actual parallel resonant circuits; and understand the applications of the resonant circuits.
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11 Mutual inductance and transformers
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This chapter will introduce the mutual inductance and transformer. A transformer is a device that is built based on the principle of mutual inductance and can be used to increase or decrease the voltage or current, and transfer electric energy from one circuit to another. It also can be used for impedance matching. Transformers have a very wide range of applications in power systems, tele communications, radio, instrumentation and many other electrical and electronics fields.
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12 Circuits with dependent sources
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The circuits we will analyze in this chapter have dependent (or controlled) sources, in which the source voltage or current is a function of other voltage or current in the circuit. Dependent sources are a useful concept in modelling and analysing electronic components, such as transistors, amplifiers, filters, etc.
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Back Matter
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