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Proceedings ArticleDOI

Modeling and performance analysis of switched reluctance generator

01 Nov 2014-pp 1-4
TL;DR: A Finite Element Analysis (FEA) model is developed for the existing machine geometry using MagNet 7.1 and solved to obtain parameters like flux linkage, inductance and torque to develop model of SRG in the MATLAB/Simulink environment.
Abstract: This paper deals with modeling and performance analysis of Switched Reluctance Generator (SRG). A Finite Element Analysis (FEA) model is developed for the existing machine geometry using MagNet 7.1.1 and solved to obtain the parameters like flux linkage, inductance and torque. The data obtained from FEA Model is utilized to develop model of SRG in the MATLAB/Simulink environment. The performance of SRG is analyzed at various operating conditions and operating variables are identified to control the output power. The model of SRG is developed with Regulator Circuit (RC) to regulate the output power irrespective of the load change and source voltage variations.
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Reference BookDOI
R. Krishnan1
28 Jun 2001
TL;DR: In this article, the authors present an analytical method for the computation of machine characteristics, such as Inductance and Rotor Position vs. Excitation Current Comparison of Measured, Analytic and Finite Element Results.
Abstract: PRINCIPLE OF OPERATION OF THE SWITCH RELUCTANCE MOTOR (SRM) Introduction Background Elementary Operation of the Switch Reluctance Motor Principle of Operation of the Switched Reluctance Motor Derivation of the Relationship Between Inductance and Rotor Position Equivalent Circuit SRM Configurations Linear Switched Reluctance Machines References DERIVATION OF SRM CHARACTERISTICS Introduction Data for Performance Computation Analytic Method for the Computation of Machine Characteristics Computation of Unaligned Inductance Computation of Aligned Inductance Computation of Inductance vs. Rotor Position vs. Excitation Current Comparison of Measured, Analytic and Finite Element Results References DESIGN OF SRM Introduction Derivation of Output Equation Selection of Dimensions Design Verification Operational Limit Selection of Number of Phases Selection of Poles Ratio of Pole-Arc to Pole-Pitch Selection of Pole Base Selection of Pole-Arcs Measurement of Inductance Calculation of Torque Design of Linear Switched Reluctance Machine (LSRM) References CHAPTER 4: CONVERTERS FOR SRM DRIVES Converter Configurations Asymmetric Bridge Converter Asymmetric Converter Variation Single Switch per Phase Converters m Switches and 2m Diodes m Switches and 2m Diodes with Independent Phase Current Control (m+1) Switch and Diode Configurations One Common Switch Configuration Minimum Switch Topology With Variable DC Link Variable DC Link Voltage with Buck Boost Converter Topology 1.5m Switches and Diodes Configuration Comparison of Some Power Converters Two Stage Power Converter Resonant Converter Circuits for Switched Reluctance Motor Drives References CONTROL OF SRM DRIVE Introduction Control Principle Closed Loop Speed Controlled SRM Drive Design of Current Controllers Flux Linkage Controller Torque Control Design of the Speed Controller References MODELING AND SIMULATION OF SRM DRIVE SYSTEM Introduction Modeling Simulation References ACOUSTIC NOISE AND ITS CONTROL IN SRM Introduction Sources of Acoustic Noise in Electrical Machines Noise Sources Noise Mitigation Qualitative Design Measures to Reduce Noise Measurement of Acoustic Noise and Vibrations Future Directions Appendix-1: Derivation of First Mode Frequency of SRM References SENSORLESS OPERATION OF SRM DRIVES Introduction Current Sensing Rotor Position Measurement Methods Rotor Position Estimation References APPLICATION CONSIDERATIONS AND APPLICATIONS Introduction Review of SRM Drive Features for Application Consideration Applications Emerging applications References

1,457 citations


"Modeling and performance analysis o..." refers background in this paper

  • ...The phase winding of the SRG is electrically and magnetically independent from other windings, which makes the machine highly fault tolerant under open-coil fault and external faults [2]....

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Book
01 Aug 1993
TL;DR: This paper presents a meta-modelling framework for computer-aided design of the power-electronic controller and some examples show how this approach can be applied to motor design.
Abstract: Introduction 1. Energy conversion principles 2. Motor design 3. Dynamic operation 4. Computer-aided design 5. The power-electronic controller 6. Control strategies 7. Losses and cooling 8. Applications 9. Example design 10. Tests and measurements References Index

1,263 citations


"Modeling and performance analysis o..." refers background in this paper

  • ...The machine and the power converter are very robust and the low inertia of the rotor allows the machine to respond to rapid variations in the load [1]....

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Journal ArticleDOI
TL;DR: How the switched reluctance generator (SRG) converts energy as directed by a controller is discussed, and the implications of the energy conversion process on how the SRG is controlled are identified.
Abstract: This paper discusses how the switched reluctance generator (SRG) converts energy as directed by a controller. Beginning with a review of the electromechanics of generation, the paper identifies the implications of the energy conversion process on how the SRG is controlled. The structure of the SRG controller for speed-control and power-control applications is discussed. Practical implementation details for commutation of the SRG are reviewed. Concepts are illustrated with a 6-kW SRG designed to serve as a starter/alternator in automotive applications.

332 citations


"Modeling and performance analysis o..." refers background in this paper

  • ...During generation, SRG produces negative torque that tends to oppose rotation, thereby extracts energy from the wind turbine [4]....

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Book
09 Nov 2005
TL;DR: WOUND ROTOR INDUCTION GENERATORS (WRIGs): STEADY STATE Introduction Construction Elements Steady-State Equations Equivalent Circuit Phasor Diagrams Operation at the Power Grid Autonomous operation of WRIG operation in the Brushless Exciter Mode Losses and Efficiency ofWRIG.
Abstract: WOUND ROTOR INDUCTION GENERATORS (WRIGs): STEADY STATE Introduction Construction Elements Steady-State Equations Equivalent Circuit Phasor Diagrams Operation at the Power Grid Autonomous Operation of WRIG Operation of WRIG in the Brushless Exciter Mode Losses and Efficiency of WRIG Summary References WOUND ROTOR INDUCTION GENERATORS: TRANSIENTS AND CONTROL Introduction The WRIG Phase Coordinate Model The Space-Phasor Model of WRIG Space-Phasor Equivalent Circuits and Diagrams Approaches to WRIG Transients Static Power Converters for WRIGs Vector Control of WRIG at Power Grid Direct Power Control (DPC) of WRIG at Power Grid Independent Vector Control of Positive and Negative Sequence Currents Motion-Sensorless Control Vector Control in Stand-Alone Operation Self-Starting, Synchronization, and Loading at the Power Grid Voltage and Current Low-Frequency Harmonics of WRIG Summary References WOUND ROTOR INDUCTION GENERATORS (WRIGs): DESIGN AND TESTING Introduction Design Specifications: An Example Stator Design Rotor Design Magnetization Current Reactances and Resistances Electrical Losses and Efficiency Testing of WRIGs Summary References SELF-EXCITED INDUCTION GENERATORS Introduction The Cage Rotor Induction Machine Principle Self-Excitation: A Qualitative View Steady-State Performance of Three-Phase SEIGs Performance Sensitivity Analysis Pole Changing SEIGs for Variable Speed Operation Unbalanced Operation of Three-Phase SEIGs One Phase Open at Power Grid Three-Phase SEIG with Single-Phase Output Two-Phase SEIGs with Single-Phase Output Three-Phase SEIG Transients Parallel Connection of SEIGs Connection Transients in Cage Rotor Induction Generators at Power Grid More on Power Grid Disturbance Transients in Cage Rotor Induction Generators Summary References STATOR CONVERTER CONTROLLED INDUCTION GENERATORS (SCIGs) Introduction Grid Connected SCIGs: The Control System Grid Connection and Four-Quadrant Operation of SCIGs Stand-Alone Operation of SCIG Parallel Operation of SCIGs Static Capacitor Exciter Stand-Alone IG for Pumping Systems Operation of SCIGs with DC Voltage Controlled Output Dual Stator Winding for Grid Applications Summary References AUTOMOTIVE CLAW-POLE-ROTOR GENERATOR SYSTEMS Introduction Construction and Principle Magnetic Equivalent Circuit (MEC) Modeling Three-Dimensional Finite Element Method (3D FEM) Modeling Losses, Efficiency, and Power Factor Design Improvement Steps The Lundell Starter/Generator for Hybrid Vehicles Summary References INDUCTION STARTER/ALTERNATORS (ISAs) FOR ELECTRIC HYBRID VEHICLES (EHVs) EHV Configuration Essential Specifications Topology Aspects of Induction Starter/Alternator (ISA) ISA Space-Phasor Model and Characteristics Vector Control of ISA DTFC of ISA ISA Design Issues for Variable Speed Summary References PERMANENT-MAGNET-ASSISTED RELUCTANCE SYNCHRONOUS STARTER/ALTERNATORS FOR ELECTRIC HYBRID VEHICLES Introduction Topologies of PM-RSM Finite Element Analysis The d-q Model of PM-RSM Steady-State Operation at No Load and Symmetric Short-Circuit Design Aspects for Wide Speed Range Constant Power Operation Power Electronics for PM-RSM for Automotive Applications Control of PM-RSM for EHV State Observers without Signal Injection for Motion Sensorless Control Signal Injection Rotor Position Observers Initial and Low Speed Rotor Position Tracking Summary References SWITCHED RELUCTANCE GENERATORS AND THEIR CONTROL Introduction Practical Topologies and Principles of Operation SRG(M) Modeling The Flux/Current/Position Curves Design Issues PWM Converters for SRGs Control of SRG(M)s Direct Torque Control of SRG(M)s Rotor Position and Speed Observers for Motion-Sensorless Control Output Voltage Control in SRG Summary References PERMANENT MAGNET SYNCHRONOUS GENERATOR SYSTEMS Introduction Practical Configurations and Their Characterization Airgap Field Distribution, emf and Torque Stator Core Loss Modeling The Circuit Model Circuit Model of PMSG with Shunt Capacitors and AC Load Circuit Model of PMSG with Diode Rectifier Load Utilization of Third Harmonic for PMSG with Diode Rectifiers Autonomous PMSGs with Controlled Constant Speed and AC Load Grid-Connected Variable-Speed PMSG System The PM Genset with Multiple Outputs Super-High-Speed PM Generators: Design Issues Super-High-Speed PM Generators: Power Electronics Control Issues Design of a 42 Vdc Battery-Controlled-Output PMSG System Methods for Testing PMSGs Note on Medium-Power Vehicular Electric Generator Systems Summary References TRANSVERSE FLUX AND FLUX REVERSAL PERMANENT MAGNET GENERATOR SYSTEMS Introduction The Three-Phase Transverse Flux Machine (TFM): Magnetic Circuit Design TFM: The d-q Model and Steady State The Three-Phase Flux Reversal Permanent Magnet Generator: Magnetic and Electric Circuit Design Summary References LINEAR MOTION ALTERNATORS (LMAs) Introduction LMA Principle of Operation PM-LMA with Coil Mover Multipole LMA with Coil Plus Iron Mover PM-Mover LMAs The Tubular Homopolar PM Mover Single-Coil LMA The Flux Reversal LMA with Mover PM Flux Concentration PM-LMAs with Iron Mover The Flux Reversal PM-LMA Tubular Configuration Control of PM-LMAs Progressive-Motion LMAs for Maglevs with Active Guideway Summary References INDEX

252 citations


"Modeling and performance analysis o..." refers methods in this paper

  • ...Asymmetric Half Bridge Converter with dedicated buses for source and load is used to avoid fault associated with the use of same bus for source and load [9]....

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Journal ArticleDOI
TL;DR: In this paper, the establishment and control for a switched-reluctance generator (SRG) are presented, and the power circuit components are properly designed to minimize the DC-link voltage ripples caused by commutation and pulsewidth modulation switching.
Abstract: The establishment and control for a switched-reluctance generator (SRG) are presented in this paper. First, the switching behavior and the DC-link ripple characteristics of a SRG are studied. Accordingly, its circuit and control models are established. And the power circuit components are properly designed to minimize the DC-link voltage ripples caused by commutation and pulsewidth modulation switching. Second, the quantitative voltage feedback control of the SRG system considering the effects of voltage ripples is made. In this issue, a unified approach is developed to estimate the plant dynamic model parameters from measurements. Then conversely, the feedback controller is designed according to the prescribed regulation voltage control specifications. Third, a dynamic commutation shift controller (DSC) is devised to enhance the voltage control performance of a SRG. As the voltage feedback control is failed when winding current becomes single-pulse mode, the proposed DSC is actuated automatically. The turn-on and turn-off angles are dynamically and automatically shifted to assist voltage feedback regulation control. More stable and better regulation control performance can be obtained. Finally, the energy conversion efficiency improvement via static commutation shift under static operation is evaluated experimentally. Theoretical bases of the proposed control approaches are derived, and their effectiveness is demonstrated by some simulation and measured results.

106 citations


"Modeling and performance analysis o..." refers background in this paper

  • ...– Flux linkage R – Resistance of the phase winding The flux linkage ( ) is a function of current (i) and rotor position ( ), therefore the voltage equation can be rewritten as [5] di dL v iR L i dt d w q = + + (2) Considering one phase of the converter, during magnetization period both switches S1 and S2 connect the DC bus to the winding, thus the phase current increases....

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