近幾年來,世界對清潔和可持續(xù)能源的需求不斷增加,隨之而來的是對低成本小型風力發(fā)電系統需求的增加,因為小型風力發(fā)電機被視為一種經濟和靈活的發(fā)電解決方案。小型風力發(fā)電機的優(yōu)點是在負荷中心附近發(fā)電,因此不需要運行高壓輸電線路,這非常適合風資源豐富的偏遠地區(qū)。永磁同步發(fā)電機（PMSG）具有轉矩大、無需外加勵磁電流、具有變速運行能力等優(yōu)點,因此永磁同步發(fā)電機是小型風力發(fā)電機的理想選擇。此外,外轉子永磁同步發(fā)電機是直接驅動運行的,它消除了系統中的齒輪箱,從而降低了成本和噪聲,提高了系統的整體發(fā)電效率。本文主要研究直驅式小型外轉子表面嵌裝式永磁同步風力發(fā)電機的設計與優(yōu)化。本文首先介紹了常用的風力發(fā)電系統,包括PMSG的類型和結構、永磁體的配置和定子繞組的布置。然后,建立了分析模型以確定小型永磁同步發(fā)電機永磁體基本電磁特性、主要尺寸、槽參數、槽數、極數和繞組結構。利用所建立的分析模型,在Matlab中開發(fā)了一套優(yōu)化程序,根據給定的設計準則來尋找最優(yōu)的發(fā)電機幾何參數。根據優(yōu)化結果設計了永磁同步發(fā)電機的結構。利用有限元法對所建立的模型進行了驗證。采用Maxwell 2D有限元法分析了永磁同步發(fā)電機的詳細特... 

【文章來源】：大連海事大學遼寧省 211工程院校

【文章頁數】：89 頁

【學位級別】：碩士

【文章目錄】：
摘要
Abstract
Glossary of Symbols
1 Introduction
    1.1 Background and significance
    1.2 Generators for wind energy systems
        1.2.1 DC generators
        1.2.2 Induction generators
        1.2.3 Doubly fed induction generators
        1.2.4 Synchronous generators
    1.3 Research status of permanent magnet wind turbines abroad and in China
        1.3.1 Research status abroad
        1.3.2 Research status in China
    1.4 Objectives and outline of the thesis
2 Structure of PMSG for Wind Energy Systems
    2.1 Classification of PMSG
        2.1.1 Radial flux machines
        2.1.2 Axial flux machines
        2.1.3 Inner-rotor and outer-rotor PM machines
    2.2 Configurations of Permanent magnets
        2.2.1 Surface-mounted magnets
        2.2.2 Surface-inset magnets
        2.2.3 Buried magnets
    2.3 Stator winding in PMSG
        2.3.1 Distributed winding
        2.3.2 Concentrated winding
    2.4 Structure of outer-rotor surface-inset magnet generator
    2.5 Summary
3 Analytic Modeling of PMSG
    3.1 Introduction and Assumptions
    3.2 Geometrical modeling
    3.3 Magnetic flux density modeling
        3.3.1 Flux density in the air gap
        3.3.2 Flux density in stator teeth
        3.3.3 Flux density in stator and rotor yokes
    3.4 Electric modeling
        3.4.1 Resistance of one phase of the stator winding
        3.4.2 Inductances
        3.4.3 Induced phase voltage
        3.4.4 Current density
        3.4.5 Angle β
    3.5 Efficiency and power loss
    3.6 Combination of pole and slot number
    3.7 Summary
4 Structure Optimization Design of PMSG
    4.1 Objective of the optimization design
    4.2 The design procedure and objective function
        4.2.1 The design procedure
        4.2.2 Objective function
    4.3 Design variables and their ranges
    4.4 Given constants and Constraints
        4.4.1 Given constants
        4.4.2 Constraints
    4.5 Design results
    4.6 Summary
5 Finite Element Analysis and Experimental Test of PMSG
    5.1 Finite element simulation of PMSG
        5.1.1 Finite element analysis model
        5.1.2 Magnetic flux density distribution
        5.1.3 Magnetic flux line distribution
        5.1.4 Induced phase voltage waveform
        5.1.5 Torque analysis
    5.2 Influence of stator slot opening on flux density in the air gap
    5.3 Influence of stator slot shape on the performance of the PMSG
    5.4 Influence of permanent magnet parameters on the performance of the PMSG
        5.4.1 Influence of the thickness of permanent magnet on the no-load back EMF ofPMSG
        5.4.2 Influence of pole arc coefficient on the no-load back EMF of PMSG
        5.4.3 Influence of pole arc coefficient on the cogging torque of PMSG
    5.5 Coupling of FEM model with Simplorer and verification
    5.6 Surface-mounted PMSG and Surface-inset PMSG performance comparison
    5.7 Experimental test
    5.8 Summary
Conclusion and Future Works
參考文獻
Appendix
Acknowledgement



本文編號：3162355