新型混合转子无刷双馈电机的电磁特性分析与实验研究

发布时间：2018-03-19 08:15

本文选题：无刷双馈电机　切入点：混合转子　出处：《沈阳工业大学》2014年博士论文　论文类型：学位论文

【摘要】：无刷双馈电机是一种运行可靠的通用交流电机，在变速恒频恒压发电和大容量变频调速系统中具有广泛应用前景。本文以国家自然科学基金和辽宁省科技攻关项目为研究背景，以新型混合转子无刷双馈电机为研究对象，进行电机的电磁特性分析与实验研究。主要研究工作包括以下几方面内容：基于无刷双馈电机的转子演变历程和磁场调制机理，针对无刷双馈电机转子耦合能力弱制约电机推广应用的瓶颈问题，提出了具有强耦合能力的隔磁磁障与短路笼条相结合的新型混合转子结构。采用解析法和有限元分析法进一步揭示了新型混合转子的磁场调制机理。通过对不同类型转子结构无刷双馈电机磁场调制能力对比分析，证明了提出的混合转子在磁场调制能力方面具有突出优势。为使提出的新型混合转子具有最佳的磁场调制作用，，首次系统地对该种转子的结构参数进行了优化。采用有限元法，计算和分析了转子极弧系数、导磁层数目、导磁层与非导磁层宽度比、有无公共笼条、短路笼条组数、短路笼条层数等结构参数对电机磁场调制能力的影响，确定了获得最佳耦合能力的电机结构参数方案，为新型混合转子的设计和研制提供了理论基础。为研究和分析该种新型电机的静、动态特性，对新型混合转子无刷双馈电机进行了电磁分析和动态特性仿真。对无刷双馈电机电磁设计的几个关键问题进行分析；基于能量摄动法，对混合转子无刷双馈电机的电感参数进行了计算；对电动机和发电机运行时无刷双馈电机的特性进行了动态仿真，对比分析了磁障转子和混合转子的运行性能。针对无刷双馈电机气隙磁场谐波可能引起的径向不平衡电磁力，进行了理论分析与仿真研究。推导了气隙磁密的解析表达式，据此分析了气隙磁场的影响因素；采用解析分析和有限元分析法，研究了极数配合对气隙谐波磁场和径向电磁力的影响，得出了极数配合的选择依据。有助于在电机设计时避免电机产生大的单边磁拉力，减少电机的振动和噪声。在国内外首次设计、研制了新型混合转子和磁障转子共用同一定子的两台无刷双馈电机试验样机，对两种不同转子结构电机进行了全面的对比实验研究。用电感参数的“静测法”对两种转子电机的电感参数进行了测试和分析；对磁障和混合转子无刷双馈电机分别进行了电动和发电机空载和负载的性能试验，对不同运行方式进行全面的性能测试。对比分析两种转子的实验结果，证明了提出的新型混合转子具有强的磁场调制作用和带负载运行能力，具有良好的运行性能，进一步验证了理论分析和研究方法的正确性和有效性。
[Abstract]:The brushless doubly fed machine is a kind of universal AC motor is reliable, and has wide application prospect in the variable speed constant frequency power and large capacity VVVF system. Based on the National Natural Science Fund and Liaoning province science and technology research project as the background, the new hybrid rotor brushless doubly fed machine as the research object, electromagnetic characteristic analysis and experimental study of motor. The main research work includes the following aspects:
The history and evolution of the magnetic field modulation mechanism of rotor BDFM based on brushless doubly fed motor rotor coupling ability weak bottleneck restricting the application of the motor, the strong coupling ability of magnetic barrier and short circuit cage combination of new hybrid rotor structure. By using analytic method and finite element analysis to further reveal the magnetic field modulation mechanism of a new type of hybrid rotor. Through the different types of rotor structure of brushless doubly fed motor magnetic field modulation analysis ability, proved that the proposed hybrid rotor has advantages in magnetic field modulation capability.
In order to make the new hybrid rotor has the best effect of magnetic field modulation, systematically for the first time on the structural parameters of the rotor were optimized. Using the finite element method, the calculation and analysis of rotor pole arc coefficient, magnetic layer number, magnetic layer and non magnetic layer width ratio, there is no public cage short circuit cage group, the number of short cage layers and the structure parameters on the magnetic field modulation capability, and determine the motor structure parameters to get the best coupling scheme, provides a theoretical basis for the design and development of new hybrid rotor.
As the research and analysis of the new motor of the static, dynamic characteristics of new hybrid rotor BDFM simulation of electromagnetic analysis and dynamic characteristics of brushless doubly fed motor electromagnetic design. Several key problems are analyzed; the energy perturbation method based on inductance parameters of brushless doubly fed motor for hybrid rotor calculate; characteristics of motor and generator operation of brushless doubly fed machine for dynamic simulation, comparative analysis of the performance of magnetic barrier rotor and hybrid rotor.
The radial brushless doubly fed motor air gap magnetic field harmonics caused by the unbalanced electromagnetic force, through theoretical analysis and simulation study. Analytical expressions of air gap flux density is deduced, then analyzes the influencing factors of the air gap magnetic field; by theoretical analysis and finite element analysis method, research the influence on the pole match the air gap harmonic magnetic field and radial electromagnetic force, the choice basis of pole number combination. To help avoid large unilateral magnetic force generated by the motor in the motor design, reduce the vibration and noise of motor.
The design for the first time at home and abroad, to develop a new type of hybrid rotor and magnetic barrier rotor share the same stator two BDFM prototype, two different kinds of rotor structure are compared comprehensive experimental research. The inductance parameters of inductance with the "static method" on the two rotor motor is tested and analysis; on the magnetic barrier and mixed rotor brushless double fed motor and electric generator respectively, no-load and load performance test, performance test of different operation modes. Comprehensive analysis of experimental results of two kinds of rotor contrast, proved that the new hybrid rotor provided with magnetic field modulation and high load operation ability, good performance, to further verify the correctness and validity of the theoretical analysis and research methods.

【学位授予单位】：沈阳工业大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TM301

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