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Строительный блокнот Introduction to electronics
15.5 Summary 583 References 583 Problems 584 IV Modern Rectifiers and Power System Harmonics SS7 16 Puwer and Harmimics in Nonsinusoidal Systems S89 16.1 Average Power 590 16.2 Root-Mean-Square (RMS) Value of a Waveform 593 16.3 Power Factor 594 16.3.1 Linear Resistive Load, Nonsinnsolilal Voltage 594 16.3.2 Nonlinear Dynamic Load, Sinusoidal Voltage 595 16.4 Power Phasors in Sinusoidal Systems 598 16.5 Harmonic Currents in Three-Phase Systems 599 16.5.1 Harmonic Cnrrents in Three-Phase Four-Wire Networks 599 16.5.2 Harmonic Currents in Three-Phase Three-Wire Networks 601 16.5.3 Harmonic Current Flow in Power Factor Correction Capacitors 602 16.fi AC Line Current Flarmonic Standards 603 16.6.1 International Electrotechnical Commission Standard 1000 603 16.6.2 lEEE/ANSl Standard 519 604 Bibliography 605 Problems 605 17 Lint;-Ct>niinutted Rectifiers Ш 17.1 The Single-Phase Full-Wave Rectifier 609 17.1.1 Continuous Conduction Mode 610 17.1.2 Discontinuous Conduction Mode 611 17.1.3 Behavior when С is Large 612 17.1.4 Minimizing ГЯDwhenCis Small 613 17.2 The Three-Phase Bridge Rectifier 615 17.2.1 Continuous Conduction Mode 615 17.2.2 Discontinuous Conduction Mode 616 17.3 Phase Control 617 17.3.1 Inverter Mode 619 17.3.2 Harmonics and Power Factor 619 17.3.3 Commutation 620 17.4 Harmonic Trap Filters 622 17.5 Transformer Connections 628 17.6 Summary 630 References 631 Problems 632 18 Pulse-Width IVIodulated Rectifiers 637 18.1 Properties of the Ideal Rectifier 638 15.2 Realizationof a Neai-ldeal Rectifiei- 640 18.2.1 CCM B()().4t Converter 642 18.2.2 DCM Flyback Converter 646 15.3 Control of the Cm-rent Waveform 64S 18.3.1 Average Current Control 648 18.3.2 Current Programmed Control 654 18.3.3 Critical Conduction Mode and Hy.steretic Control 657 18.3.4 Nonlinear Carrier Control 659 15.4 Single-Phase Convetter Sy.stems Incorporating Ideal Rectifier.4 663 15.4.1 Energy Storage 663 15.4.2 Modeling the Outer Low-Bandvf idth Control System 668 15.5 RMS Values of Rectifier Waveforms 673 18.5.1 Boost Rectifier Example 674 18.5.2 Сотрагкчоп of Singie-Pliase Rectifier Topologies 676 15.6 Modeling Losses atid Efficiency in CCM High-Quality Rectifiers 678 15.6.1 Expression for Controller Dnty Cycle rf(f) 679 18.6.2 Expression for the DC Load Current 681 18.6.3 Solution for Converter Efficiency Г1 683 18.6.4 Design Example 684 18.7 Ideal Three-Phase Rectifiers 685 18.8 Summary of Key Points 691 References 692 Problems 696 V Resonant Converters 703 19 Resonant Conversion 705 19.1 Sinusoidal Analysi,4 of Resonant Converters 709 19.1.1 Controlled Switch Network Model 710 19.1.2 Modeling the Rectifier and Capacitive Filter Networks 711 19.1.3 Resonant Tank Network 713 19.1.4 St)lution of Converter Voltage Conversion Ratio M= V/V 714 19.2 Examples 715 19.2.1 Series Resonant DC~DC Converter Example 715 19.2.2 Subharmonic Modes of the Series Resonant Converter 717 19.2.3 Piiraiiel Resonant DC-DC Conveiter Example 718 19.3 St)ft Switching 721 19.3.1 Operation of the Full Bridge Below Resonance: Zero-Current Switching 722 19.3.2 Operation of the Full Bridge Above Resonance: Zero-Voltage Switching 723 19.4 Load-Dependent Properties of Resonant Converters 726 19.4.1 Inverter Output Characteri.4tics 727 19.4.2 Dependence of Tran.si.stor Current on Load 729 19.4.3 Dependence of the ZVS/ZCS Boundary on Lt>ad Resistauce 734 |
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