# Elements of Power Electronics

## Krein, Phillip T.

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Power electronics is an enabling technology for almost all electrical applications. The field is growing rapidly because electrical devices need electronic circuits to process their energy. Elements of Power Electronic, the first book to discuss this subject in a conceptual framework, provides comprehensive coverage of power electronics at a level suitable for novices in the field. It aims to establish a fundamental engineering basis for power electronics analysis, design, and implementation. More than 160 examples and 350 chapter problems support the presented concepts. An extensive World Wide Web site http://power.ece.uiuc.edu/krein_text includes additional examples, laboratory materials, and author contact.

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Contenuti:

• Part I: PRINCIPLES
• 1: Background
• 1.1: The energy basis of electrical engineering
• 1.2: What is Power Electronics?
• 1.3: The need for electrical conversion
• 1.4: History
• 1.5: Goals and methods of electrical conversion
• 1.6: Recap
• 1.7: Problems
• 1.8: References
• 2: Organizaing and Analyzing Switches
• 2.1: Introduction
• 2.2: the switch matrix
• 2.3: the reality of Kirchoff's Voltage and Current Laws
• 2.4: The switch state matrix and switching functions
• 2.5: Overview of switching devices
• 2.6: Analyzing diode switch circuits
• 2.7: The significance of Fourier analysis
• 2.8: Review of Fourier Series
• 2.9: Power and average power in Fourier Series
• 2.10: Fourier Series representation of switching functions
• 2.11: Summary and recap
• 2.12: Problems
• 2.13: References
• 3: Converter Concepts
• 3.1: Introduction
• 3.2: Source conversion
• 3.3: Distortion
• 3.4: Regulation
• 3.5: Equivalent sources
• 3.6: Introduction to power filtering
• 3.7: Power filter examples
• 3.8: Power factor
• 3.9: Recap
• 3.10: Problems
• 3.11: References
• Part II: CONVERTERS AND APPLICATIONS
• 4: DC-DC Converters
• 4.1: Introduction
• 4.2: Why not voltage dividers?
• 4.3: Linear methods and direct dc-dc converters
• 4.3.1: Linear regulators
• 4.3.2: The buck converter
• 4.3.3: The boost converter
• 4.4: Indirect dc-dc converters
• 4.4.1: The buck-boost converter
• 4.4.2: The boos-buck converter
• 4.4.3: The flyback converter
• 4.4.4: Other indirect converter
• 4.5: Forward converters
• 4.5.1: Basic transformer operation
• 4.5.2: General considerations in forward converters
• 4.5.3: Catch-winding forward converters
• 4.5.4: Ac link forward convecters
• 4.5.5: Boost-derived forward converters
• 4.6: Bidirectional converters
• 4.7: Dc-dc converter design examples
• 4.8: Recap
• 4.9: Problems
• 4.10: Reference
• 5: Diode-Capacitor Circuits and Rectifiers
• 5.1: Introduction
• 5.2: Rectifier overview
• 5.3: The classical rectifier - operation and analysis
• 5.4: The classical rectifier - regulation
• 5.5: Inductive filtering
• 5.6: Charge pumps
• 5.7: Ac-dc switching power converters
• 5.7.1: Introduction
• 5.7.2: Controlled bridge and midpoint rectifiers
• 5.7.3: The complementary midpoint rectifier
• 5.7.4: The multi-input bridge rectifier
• 5.8: Effects of line inductance
• 5.9: Recap
• 5.10: Problems
• 5.11: References
• 6: Inverters
• 6.1: Introduction
• 6.2: Inverter considerations
• 6.3: Voltage-sourced inverter control
• 6.4: Pulse-width modulation
• 6.4.1: Introduction
• 6.4.2: Creating PWM waveforms
• 6.4.3: Drawbacks of PWM
• 6.4.4: Multi-level PWM
• 6.4.5: Inverter input current under PWM
• 6.5: Pulse-width modulated rectifiers
• 6.6: Current-source inverters
• 6.7: A short introduction to converters for ac drives
• 6.8: Inverter design examples
• 6.9: Recap
• 6.10: Problems
• 6.11: References
• 7: Ac-Ac Converters
• 7.1: Introduction
• 7.2: Frequency matching conditions
• 7.3: Direct-switching frequency changers
• 7.3.1: Slow-switching frequency changers
• 7.3.2: The choice fswitch = fin + fout
• 7.3.3: Unifying the direct switching methods
• 7.4: The cycloconverter
• 7.5: Other nonlinear phase modulation methods
• 7.6: PWM ac-ac conversion
• 7.8: Ac regulators
• 7.9: Integral cycle control
• 7.10: Recap
• 7.11: Problems
• 7.12: References
• 8: Introduction to Resonance in Converters
• 8.1: Introduction
• 8.2: Review of resonance
• 8.2.1: Characteristic equations
• 8.2.2: Step function excitation
• 8.2.3: Phasor analysis of series-resonant filters
• 8.3: Parallel resonance
• 8.4: Soft-switching techniques -introduction
• 8.4.1: Soft-switching principles
• 8.4.2: Basic configurations
• 8.4.3: Parallel capacitor as a dc-dc soft switching element
• 8.5: Soft switching in dc-dc converters
• 8.5.1: Description of quasi-resonance
• 8.5.2: ZCS transistor action
• 8.5.3: ZVS transistor action
• 8.6: Resonance used for control - forward convecters
• 8.7: Recap
• 8.8: Problems
• 8.9: References
• 9: Discontinuous Modes
• 9.1: Introduction
• 9.2: Dc-dc converters acting in discontinuous mode
• 9.2.1: The nature of discontinuous mode
• 9.2.2: Discontinuous mode relationships for dc-dc converters
• 9.2.3: Critical inductance
• 9.2.4: Critical capacitance
• 9.3: Rectifiers and other converters in discontinuous mode
• 9.3.1: Rectifiers
• 9.3.2: Ac regulators revisited
• 9.4: Recap
• 9.5: Problems
• 9.6: References
• Part III: REAL COMPONENTS AND THEIR EFFECTS
• 10: Real Sources and Loads
• 10.1: Introduction
• 10.3: Wire inductance
• 10.4: Critical values and examples
• 10.5: Real sources and interfaces for them
• 10.5.1: Impedance behavior of sources
• 10.5.2: Dc source interfaces
• 10.5.3: Interfaces for ac sources
• 10.6: Recap
• 10.7: Problems
• 10.8: References
• 11: Capacitors and Resistors
• 11.1: Introduction
• 11.2: Capacitors - types and equivalent circuits
• 11.2.1: Major types
• 11.2.2: Equivalent circuit
• 11.2.3: Impedance behavior
• 11.2.4: Simple dielectric types and materials
• 11.2.5: Electrolytics
• 11.2.6: Double-layer capacitors
• 11.3: Effects of ESR
• 11.4: Wire resistance
• 11.5: Resistors
• 11.6: Recap
• 11.7: Problems
• 11.8: References
• 12: Magnetics concepts for power electronics
• 12.1: Introduction
• 12.2: Maxwell's equations
• 12.3: Materials and properties
• 12.4: Magnetic circuits
• 12.4.1: The circuit analogy
• 12.4.2: Inductance
• 12.4.3: Ideal and real transformers
• 12.5: The hysteresis loop and losses
• 12.6: Saturation as a design constraint
• 12.6.1: Saturation limits
• 12.6.2: General design considerations
• 12.7: Design examples
• 12.7.1: Core material and geometry
• 12.7.2: Design checks and capacity
• 12.7.3: Losses
• 12.8: Recap
• 12.9: Problems
• 12.10: References
• 13: Power Semi-Conductors in Converters
• 13.1: Intoduction
• 13.2: Switching device states
• 13.3: Static models
• 13.4: Switch energy losses and examples
• 13.4.1: General analysis of losses
• 13.4.2: Losses during commutation
• 13.4.3: Examples
• 13.5: Simple heat transfer models for power semiconductors
• 13.6: The PN Junction as a Power Device
• 13.7: PN junction diodes and alternatives
• 13.8: The thyristor family
• 13.9: Bipolar power transistors
• 13.10: field-effect transistors
• 13.11: Insulated gate bipolar transistors
• 13.12: Snubbers
• 13.12.1: Introduction
• 13.12.2: Lossy turn-off snubbers
• 13.12.3: Turn-on snubbers
• 13.12.4: Combined snubbers
• 13.12.5: Lossless snubbers
• 13.13: Dc-dc converter design example
• 13.14: Recap
• 13.15: Problems
• 13.16: References
• 14: Interfacing With Power Semiconductors
• 14.1: Introduction
• 14.2: Gate drives
• 14.2.1: Overview
• 14.2.2: Voltage-controlled gates
• 14.2.3: Current-controlled gates
• 14.2.4: Pulsed gate drives
• 14.2.5: Other thyristors
• 14.3: Isolation
• 14.4: P-channel applicatins and shoot through
• 14.5: Sensors for power electronic switches
• 14.5.1: Resistive sensing
• 14.5.2: Integrating sensing functions with the gate drive
• 14.5.3: Non-electrical sensing
• 14.6: Recap
• 14.7: Problems
• 14.8: References
• Part IV: CONTROL ASPECTS
• 15: Overview of Feedback Control for Converters
• 15.1: Introduction
• 15.2: The regulation and control problem
• 15.2.1: Introduction
• 15.2.2: Defining the regulation problem
• 15.2.3: The control problem
• 15.3: Review of feedsback control principles
• 15.3.1: Open loop and closed loop control
• 15.3.2: Block diagrams
• 15.3.3: System gain
• 15.3.4: Transient response
• 15.3.5: Stability
• 15.4: Converter models for feedback
• 15.4.1: Basic converterdynamics
• 15.4.2: Fast switching
• 15.4.3: Piecewise-linear models
• 15.4.4: Discrete-time models
• 15.5: Voltage-mode and current-mode control for dc-dc converters
• 15.5.1: Votage mode control
• 15.5.2: Current mode control
• 15.5.3: Large-signal issues in voltage-mode and current-mode control
• 15.6: Comparator-based controls for rectifier systems
• 15.7: Proportional and proportional-integral control applications
• 15.8: Recap
• 15.9: Problems
• 15.10: References
• 16: Approximate Methods for Control Design
• 16.1: Introduction
• 16.2: Averaging methods and models
• 16.2.1: Formulation of averaged models
• 16.2.2: Averaged circuit models
• 16.3: Small-signal analysis and linearization
• 16.3.1: The need for small-signal models
• 16.3.2: Obtaining models
• 16.3.3: Generalizing the process
• 16.4: Control and control design based on linearization
• 16.4.1: Transfer functions
• 16.4.2: Control design C Introduction
• 16.4.3: Compensation and filtering
• 16.4.4: Compensated feedback examples
• 16.4.5: Challenges for control design
• 16.5: Recap
• 16.6: Problems
• 16.7: References
• 17: Boundary Control
• 17.1: Introduction
• 17.2: Hysteresis control
• 17.2.1: Definition and basic behavior
• 17.2.2: Hysteresis control in dc-dc converters
• 17.2.3: Power factor corrector
• 17.2.4: Inverters
• 17.2.5: Design approaches
• 17.3: General boundary control
• 17.3.1: Behavior near a boundary
• 17.3.2: Possible behavior
• 17.3.3: Choosing a boundary
• 17.4: Other classes of boundaries
• 17.5: Recap
• 17.6: Problems
• 17.7: References
• APPENDIX
• A.: Trigonometric identities
• B.: Unit systems
• C.: Computer analysis of problems
• C.1: Mathematica listings
• C.3: SPICE listings
• D.: Reference Materials
• D.1: Fourier series of certain waveforms
• D.2: Three-Phase Graph Paper
• INDEX

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