取向硅钢片对近极槽永磁力矩电机性能影响的研究

发布时间：2018-09-06 11:58

【摘要】：随着国防、军工、航空航天、汽车等行业的产品不断呈现出复杂的形态,其对加工设备尤其是其中的驱动电机的要求也越来越高。而饱和是设计高性能电机时所遇到的主要问题,提高电机的饱和工作点,以及电机在发生饱和时准确计算电机的性能参数意义重大,本课题是在国家自然科学基金项目“取向硅钢片近极槽永磁力矩电机磁场特性与转矩性能的研究”(5160070739)的支撑下进行的。首先,对有取向硅钢片作为电机定子的可行性进行了分析。然后根据近极槽永磁力矩电机的结构特点,设计一款有取向硅钢片定子结构的近极槽永磁力矩电机。并对其进行电磁场有限元分析,与相同拓扑结构的采用常规无取向硅钢片定子结构的电机的电磁场分析结果进行对比。分别对两电机的空载磁场、空载气隙磁密、空载反电动势,及负载磁场进行分析。其次,在相同拓扑结构下分析两电机的电流-转矩线性度曲线。在考虑负载时定子磁导率的情况下研究两电机的“齿槽转矩”,由于电机在负载运行时由于定子齿部局部饱和现象引起整个定子磁路分布不再对称,因此在考虑负载时定子磁导率所计算的“齿槽转矩”和常规计算所得的结果不同。并对两电机转矩及转矩脉动进行研究。最后从极弧系数、定子齿宽等角度对电机进行优化。最后,根据磁路欧姆定律,永磁体在气隙中产生的磁链会随着电机饱和程度的不同而发生变化,采用冻结磁导率法研究负载运行时两电机的磁链,并与常规方法所得的磁链进行对比,通过研究磁链来研究电机的饱和状态。并根据电机饱和与电感参数的相关性,研究两电机电感与电流的非线性关系。通过对比两电机在空载、额定负载及三倍额定负载下电机的电感参数,研究两电机的饱和特性。
[Abstract]:With the development of national defense, military industry, aerospace, automobile and other industries, the products of the industry are becoming more and more complex, and the requirements of the processing equipment, especially the driving motor, are becoming higher and higher. Saturation is the main problem in designing high performance motor. It is of great significance to improve the saturation point of motor and calculate the performance parameters of motor accurately when saturation occurs. This subject is carried out under the support of the National Natural Science Foundation of China, "the study of magnetic field characteristics and torque performance of oriented silicon steel subpolar groove permanent magnet torque motor" (5160070739). Firstly, the feasibility of using oriented silicon steel as motor stator is analyzed. Then according to the structure characteristics of the near pole groove permanent magnet torque motor, a near pole groove permanent magnet torque motor with the stator structure of oriented silicon steel sheet is designed. The finite element analysis of electromagnetic field is carried out, and the results of electromagnetic field analysis of the motor with the same topology are compared with that of the motor with conventional non-oriented silicon steel stator structure. The no-load magnetic field, no-load air-gap magnetic density, no-load backEMF and load magnetic field of the two motors are analyzed respectively. Secondly, the current-torque linearity curves of the two motors are analyzed under the same topology. The "slot torque" of the two motors is studied when the stator permeability is taken into account. The distribution of the whole stator magnetic circuit is no longer symmetrical due to the local saturation of the stator teeth when the motor is running under the load. Therefore, when the load is considered, the "slot torque" calculated by the stator permeability is different from that obtained by the conventional calculation. The torque and torque ripple of two motors are studied. Finally, the motor is optimized from the angle of pole arc coefficient and stator tooth width. Finally, according to the Ohm law of magnetic circuit, the flux produced by permanent magnet in air gap will change with the saturation degree of motor. Compared with the conventional method, the saturation state of the motor is studied by studying the flux chain. The nonlinear relationship between inductance and current of two motors is studied according to the correlation between saturation and inductance parameters. The saturation characteristics of the two motors were studied by comparing the inductance parameters of the two motors under no-load, rated load and triple rated load.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM359.6

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