EMI Filter Design

NOTE EDITORE

With today’s electrical and electronics systems requiring increased levels of performance and reliability, the design of robust EMI filters plays a critical role in EMC compliance. Using a mix of practical methods and theoretical analysis, EMI Filter Design, Third Edition presents both a hands-on and academic approach to the design of EMI filters and the selection of components values. The design approaches covered include matrix methods using table data and the use of Fourier analysis, Laplace transforms, and transfer function realization of LC structures. This edition has been fully revised and updated with additional topics and more streamlined content. New to the Third Edition Analysis techniques necessary for passive filter realization Matrix method and transfer function analysis approaches for LC filter structure design A more hands-on look at EMI filters and the overall design process Through this bestselling book’s proven design methodology and practical application of formal techniques, readers learn how to develop simple filter solutions. The authors examine the causes of common- and differential-mode noise and methods of elimination, the source and load impedances for various types of input power interfaces, and the load impedance aspect of EMI filter design. After covering EMI filter structures, topologies, and components, they provide insight into the sizing of components and protection from voltage transients, discuss issues that compromise filter performance, and present a goal for a filter design objective. The text also includes a matrix method for filter design, explains the transfer function method of LC structures and their equivalent polynomials, and gives a circuit design example and analysis techniques. The final chapter presents packaging solutions of EMI filters.

SOMMARIO

EMI FiltersIntroductionTechnical ChallengesTypes of EMI FiltersNo Such Thing as Black MagicIt Is All in the MathematicsWhy Call EMI Filters Black Magic?What Is EMI?Regular Filters versus EMI FiltersSpecifications: Real or ImaginedThe Inductive Input for the 220-A Test MethodThe 400-Hz Filter Compared with the 50- or 60-Hz FilterCommon Mode and Differential Mode: Definition, Cause, and EliminationDefinition of Common and Differential ModesThe Origin of Common-Mode NoiseGeneration of Common-Mode Noise—LoadElimination of Common-Mode Noise—Line and LoadGeneration of Differential-Mode Noise?Three-Phase Virtual GroundEMI Filter Source Impedance of Various Power LinesSkin EffectApplying Transmission Line Concepts and ImpedancesApplying Transmission Line Impedances to Differential and Common ModeDifferences among Power Line MeasurementsSimple Methods of Measuring AC and DC Power LinesOther Source ImpedancesThe Various AC Load ImpedancesThe Resistive LoadOff-Line Regulator with Capacitive LoadOff-Line Regulator with an Inductor ahead of the Storage CapacitorThe Power Factor Correction CircuitTransformer LoadThe UPS LoadDC Circuit—Load and SourceVarious Source ImpedanceSwitcher LoadDC Circuit for EMI Solutions or RecommendationsSome Ideas for the Initial Power SupplyOther Parts of the SystemLossy ComponentsRadiated EmissionsTypical EMI Filters—Pros and ConsThe p FilterThe T FilterThe L FilterThe Typical Commercial FilterThe Cauer FilterThe RC ShuntThe Conventional FiltersFilter Components—the CapacitorCapacitor SpecificationsCapacitor Construction and Self-Resonant FrequencyVeeing the CapacitorMargins, Creepage, and Corona—Split Foil for High VoltageCapacitor Design—Wrap-and-Fill TypeFilter Components—the InductorInductor Styles and SpecificationsCore TypesHigh-Current InductorsInductor DesignConverting from Unbalanced to BalancedCommon-Mode ComponentsThe Capacitor to GroundVirtual GroundZ for ZorroCommon-Mode InductorCommon-Mode CalculationDifferential Inductance from a Common-Mode InductorCommon-Mode Currents—Do They All Balance?The Transformer’s Addition to the EMI FilterTransformer AdvantagesIsolationLeakage CurrentCommon ModeVoltage Translation—Step Up or DownThe Transformer as a Key Component of the EMI PackageSkin EffectReviewElectromagnetic Pulse and Voltage TransientsUnidirectional versus BidirectionalThe Three TheoriesInitial High-Voltage InductorThe Arrester LocationHow to Calculate the ArresterThe Gas TubeWhat Will Compromise the Filter?Specifications—TestingPower Supplies—Either as Source or Load9- and 15-Phase AutotransformersNeutral Wire Not Part of the Common-Mode InductorTwo or More Filters in Cascade—the Unknown CapacitorPoor Filter GroundingThe "Floating" FilterThe Unknown Capacitor in the Following EquipmentFilter Input and Output Too Close TogetherGasketsWaves as Noise SourcesThe SpikeThe PulseThe Power Spectrum—dB µA/MHzMIL-STD-461 CurveInitial Filter Design RequirementsDifferential-Mode Design GoalsThe Differential-Mode Filter Input ImpedanceThe Differential-Mode Filter Output ImpedanceThe Input and Output Impedance for a DC FilterCommon-Mode Design GoalsEstimation of the Common-Mode Source ImpedanceMethods of Reducing the Inductor Value due to High CurrentMatrices, Transfer Functions, and Insertion LossSynthesis, Modeling, and AnalysisReview of the A MatrixTransfer FunctionsReview of Matrix TopologiesThe p FilterThe L MatrixThe T FilterThe Cauer or Elliptic MatrixThe RC ShuntFilter Applications and ThoughtsSingle-Phase AC FilterThree-Phase FiltersLow-Current WyeHigh-Current WyeThe Single InsertThe Low-Current DeltaHigh-Current DeltaTelephone and Data FiltersPulse Requirements—How to Pass the PulseThe DC-DC FilterLow-Current FiltersMatrix Applications: A Continuation of Chapter 16The Impedance of the Source and LoaddB Loss Calculations of a Single p FilterExample of the Calculations for a Single p FilterDouble p Filter: Equations and dB LossTriple p Filter: Equations and dB LossNetwork Analysis of Passive LC StructuresLossless NetworksNetwork Impedances Using Z ParametersNetwork Admittances Using Y ParametersTransfer Function Analysis—H(j?)Transfer Function Analysis—H(s)Coefficient-Matching TechniqueEMI Filter StabilityFilter Design Techniques and Design ExamplesFilter Design RequirementsDesign TechniquesFilter Design SummaryEMI Filter Design ExampleFour-Pole LC StructurePackaging InformationThe LayoutEstimated VolumeVolume-to-Weight RatioPotting CompoundsAppendix A: K Values of Different Topologies Appendix B: LC Passive Filter DesignAppendix C: Conversion FactorsIndex

AUTORE

Richard Lee Ozenbaugh is a consultant of EMI filter design and magnetics engineering for such companies as Hughes Aircraft Corporation, Parker Hannifin Aerospace, Franklin Electric, McDonnell Douglas, and Cirrus Logic. Involved in the electrical and electronics industries since the early 1950s, he has worked as a radar specialist for the U.S. Navy as well as an engineer for Hopkins Engineering and RFI Corporation. Timothy M. Pullen is a principal electrical engineer at Rockwell Collins. He has over 25 years of experience in the research, design, and development of electronic systems for commercial and military applications, including power electronics, motor control, and full authority digital engine control technology. His areas of expertise include model-based design and control, analog circuit design, and filter design.

ALTRE INFORMAZIONI

• Condizione: Nuovo
• ISBN: 9781138074071
• Dimensioni: 9.25 x 6.25 in Ø 1.00 lb
• Formato: Brossura
• Illustration Notes: 148 b/w images, 10 tables and 282
• Pagine Arabe: 272