LCC串并联谐振转换器的滑模控制研究

发布时间：2020-09-27 19:58

　　 Elements such as high-efficiency optimization have seen switching power converters gradually replace the role of linear power converters.High frequency power supplies and high voltage are used considerably in high voltage applications,namely industry applications,X-ray high voltage applications,electrostatic precipitation,atmospheric pressure plasma processing,diagnostics in medicine,etc.The LCC criteria however presents a reliable option incorporated in its topology,making upmost use of leakage inductance convoluting capacitance to remove the negative effects of converter operation.The LCC Series-Parallel Resonant Converter adopts the desirable properties of both the Parallel and Series Resonant Converter which include reduced peak currents,miniature variations in switching frequency and high efficiency.This renders it a viable choice in most power and energy applications.Although there are several models and control schemes in literature,in this paper a Sliding Mode Control approach for the enunciated LCC-type converter is employed.Sliding Mode Control(SMC)is a satisfactory robust control technique suitable for a specific array of nonlinear systems.The sliding surface or hyperplane,which allows a control signal to direct trajectory points,in this paper is based on current-mode control.The configuration of the SMC controller is robust-amplitude modulated.Sliding Mode Control(SMC)though effective boasts of certain control constraints,PI(Proportional-Integral)control to sliding function is utilized against Zero Output Voltage Steady-State Error.Integration of protection circuit and hysteresis band remove current limitation and constant switching frequency.The small-signal modelling analysis was done to equalize and mathematically derive the system parameters and criterion due to its non-linearities.Its aided in the clear and concise representation of the system including its relevant state-space approximations.The main process of the SMC algorithm is to capture power stage parameters and simulate them towards the desired system operation point(SMC sliding surface)via Averaging,Steady State,Linearization and Iteration.Sliding mode approach is able to disregard certain anomalies and irregularities in converter topology thereby achieving good results.
【学位单位】：华南理工大学
【学位级别】：硕士
【学位年份】：2019
【中图分类】：TM46
【文章目录】：
ABSTRACT
Chapter1 Introduction
    1.1 Background
    1.2 Brief History of Switched Mode Power Supply
    1.3 Drawbacks,Harmonic Distortions& Industrial applications
    1.4 Literature Review
        1.4.1 Resonant converter
        1.4.2 Classes of Resonant Converters
    1.5 Proposed Model& Illustrations
    1.6 Motivation
    1.7 Research Objectives
    1.8 Thesis Organization
    1.9 Chapter Summary
Chapter2 DC/DC Power Supply Fundamentals
    2.1 Switched Power Supply
    2.2 Switched-Mode Power Supply Topologies
        2.2.1 Non-Isolated Topologies
        2.2.2 Isolated Topologies
        2.2.3 Multiple-Switched Topologies
        2.2.4 Switched Mode Topology Applications& Classifications
    2.3 DC-DC Resonant Converter
        2.3.1 Classes of DC/DC Resonant Converter Topologies
        2.3.2 Modes of Operation of the DC/DC Resonant Converter
    2.4 Control Methods& Techniques
        2.4.1 Introduction
        2.4.2 Linear vs Non-Linear Control Systems
    2.5 Sliding Mode Control
    2.6 Chapter Summary
Chapter3 Modelling,Control Design and Implementation
    3.1 Sliding Mode Control
        3.1.1 Introduction
        3.1.2 Review of the theory of Sliding Mode Control(SMC)
    3.2 Sliding Mode Control for DC/DC Converters
    3.3 Sliding Mode Control Researches and Applications in Electrical& Mechanical Systems
    3.4 Proposed SMC Controller for the DC/DC Resonant Converter
    3.5 State-Space Small Signal Modelling Technique Overview
        3.5.1 Small Signal Modelling& Approximation
        3.5.2 State-Space Modelling
        3.5.3 Transfer Function Analysis
    3.6 Harmonic Approximation
    3.7 Synchronous Rectification
    3.8 Entire System Representation
    3.9 Chapter Summary
Chapter4 Experimental Results and Simulation
    4.1 Experiment Basis
    4.2 Hardware Parts
    4.3 Experimental Flow Graph
    4.4 Simulation Circuit Diagram Representation
    4.5 Algorithm description
    4.6 Experimental Description
    4.7 Simulation,Results& Verification
Chapter5 Conclusion and Future Work
    5.1 Conclusion
    5.2 Future Work
References
攻读硕士学位期间取得的研究成果
Glossary
Appendix
Acknowledgement
附件

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