【作者】 周竞捷；

【导师】 杨善水； 张卓然；

【作者基本信息】 南京航空航天大学 ， 电力系统及其自动化， 2009， 硕士

【摘要】 混合励磁同步电机是永磁同步电机与电励磁同步电机两种电机形式的有机结合。混合励磁同步电机(HESM)继承了永磁同步电机的优点,同时又具有气隙磁场调节能力。本文针对新型结构的并列结构混合励磁无刷直流发电机,在电机的结构原理、有限元分析、设计规律和整流电路的工作特性等方面开展深入的研究,并进行实验验证与分析。对所研究的并列结构HESM通过三维有限元仿真计算得到电机内的磁场分布特点和调磁特性,对比分析不同铁心长度的仿真模型,总结出铁心长度的设计原则。指出并列结构HESM中存在着轴向漏磁现象,并通过三维有限元静磁场分析揭示双向励磁作用下的轴向漏磁通变化规律,为并列结构HESM内永磁及电励磁两部分之间轴向距离的选择提供了理论依据。永磁同步发电机采用新型的共阳极12相零式整流输出以构成12相永磁无刷直流发电机。系统地对比研究了六相双Y整流和12相零式整流两种不同整流方式输出的整流二极管电流应力、发电机损耗和容错能力等特性,验证了12相零式整流输出相比六相双Y整流输出在低压直流电源系统中的应用优势。完成了并列结构混合励磁无刷直流发电机的三维有限元场路耦合分析和实验验证,表明该并列结构HESM继承了永磁电机电压调整率低的优点,且励磁电流能实现良好的双向电压辅助调节功能。更多还原

【Abstract】 Hybrid excitation synchronous machine is an organic combination of permanent magnet excitation synchronous machine and electric excitation synchronous machine. While maintaining the advantage of permanent magnet synchronous machine (PMSM), hybrid excitation synchronous machine (HESM) also combines the regulation capacity of air gap magnetic field. A novel coordinate structure hybrid excitation brushless DC generator is proposed. In-depth study into structure, finite element analysis, design principles, rectifier circut are presented and verified by experiments and analysis.Internal magnetic field distribution features and magnetic field regulation characteristics are studied by 3D finite element calculation and. Principles of iron core length are reached by comparison analysis. Axial flux leakage, a problem unique to coordinate structure HESM is pointed out and variation principle of axial flux linkage under bi-directional excitation is revealed by 3D static magnetic field analysis, providing theoretical references for determining the axial distance between permanent magnet and electric excitation.A BLDC generator structure is proposed consisted of a synchronous generator with common-anode 12-phase half-wave rectified output. Systematic comparison of features such as generator losses, rectifier diode current stresses are carried out under 6-phase double-star rectified output and 12-phase zero-type rectified output structures, which demonstrate the advantage of 12-phase zero-type rectified output BLDC generator in low voltage DC power system. 3D field-circuit coupled analysis and experiment verification of coordinate structure hybrid excitation BLDC generator are presented, which shows that the generator inherits permanent magnet generator advantages of low voltage regulation ratio and good complementary regulation capacity of excitation current.更多还原