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(fēng)力發(fā)電系統(tǒng)需求的增加,因?yàn)樾⌒惋L(fēng)力發(fā)電機(jī)被視為一種經(jīng)濟(jì)和靈活的發(fā)電解決方案。小型風(fēng)力發(fā)電機(jī)的優(yōu)點(diǎn)是在負(fù)荷中心附近發(fā)電,因此不需要運(yùn)行高壓輸電線路,這非常適合風(fēng)資源豐富的偏遠(yuǎn)地區(qū)。永磁同步發(fā)電機(jī)（PMSG）具有轉(zhuǎn)矩大、無需外加勵(lì)磁電流、具有變速運(yùn)行能力等優(yōu)點(diǎn),因此永磁同步發(fā)電機(jī)是小型風(fēng)力發(fā)電機(jī)的理想選擇。此外,外轉(zhuǎn)子永磁同步發(fā)電機(jī)是直接驅(qū)動(dòng)運(yùn)行的,它消除了系統(tǒng)中的齒輪箱,從而降低了成本和噪聲,提高了系統(tǒng)的整體發(fā)電效率。本文主要研究直驅(qū)式小型外轉(zhuǎn)子表面嵌裝式永磁同步風(fēng)力發(fā)電機(jī)的設(shè)計(jì)與優(yōu)化。本文首先介紹了常用的風(fēng)力發(fā)電系統(tǒng),包括PMSG的類型和結(jié)構(gòu)、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(jī)永磁體基本電磁特性、主要尺寸、槽參數(shù)、槽數(shù)、極數(shù)和繞組結(jié)構(gòu)。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(jù)給定的設(shè)計(jì)準(zhǔn)則來尋找最優(yōu)的發(fā)電機(jī)幾何參數(shù)。根據(jù)優(yōu)化結(jié)果設(shè)計(jì)了永磁同步發(fā)電機(jī)的結(jié)構(gòu)。利用有限元法對所建立的模型進(jìn)行了驗(yàn)證。采用Maxwell 2D有限元法分析了永磁同步發(fā)電機(jī)的詳細(xì)特... 

【文章來源】：大連海事大學(xué)遼寧省 211工程院校

【文章頁數(shù)】：89 頁

【學(xué)位級(jí)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(xiàn)
Appendix
Acknowledgement



本文編號(hào)：3162355