5.5kW异步起动永磁同步电机设计与仿真分析
发布时间：2018-11-20 14:58
【摘要】：异步起动永磁同步电机与感应电机整体设计相似,永磁电机是在感应电动机转子上安装永磁体,可以依靠转子导条产生的异步转矩实现自起动。与感应电机相比,异步起动永磁同步电机具有高功率因素、高效率和宽的经济运行范围等优点。相比于感应电机,异步起动永磁同步电机转子永磁体结构多样,因此永磁电机结构种类较多。永磁电机转子磁路不对称,导致传统的设计理论和分析方法已难以对永磁电机进行有效的分析,因此需要运用其他科学理论和计算机的辅助下完成电动机的结构设计和磁路设计。但是,异步起动永磁同步电机在实际应用当中仍存在一些问题,这主要是由电机的齿槽转矩和转子磁路不对称造成的。本文主要从以下三个方面进行研究,其主要研究内容如下:1.分析了异步起动永磁同步电机工作机理,主要包括了永磁电机的起动特性、功率特性、转矩特性、功角特性和齿槽转矩等,并分析了影响永磁电机磁通、转矩、功率因数和效率等的因素,为后续研究提供了理论依据。2.对5.5kW异步起动永磁同步电机进行结构和磁路设计,其中结构设计主要包括永磁电机的定转子铁心和齿槽、电枢绕组、槽数的配合、永磁体充磁方向长度、永磁体宽度以及永磁材料的选择等;磁路设计主要包括空载漏磁系数0?、气隙系数K?和计算极弧系数i?的计算等;3.以永磁体用量最少为目的,利用Ansoft仿真软件对异步起动永磁同步电机进行建模。首先分析了永磁体结构分别为W、U和V型的永磁电机空载运行时,根据永磁电机的磁力线分布、气隙磁密、漏磁系数和齿槽转矩等变化特点,从而选择了W和U型永磁电机;其次根据电机空载运行的分析,对选择的W和U型的永磁电机,进一步分析对比了它们空载起动和负载起动特性,最终选择了W型结构永磁电机;最后改变W型永磁电机永磁体的尺寸,以永磁体用量最少为优化目标,进行仿真对比得到最终结果。
[Abstract]:The asynchronous starting permanent magnet synchronous motor is similar to the induction motor. The permanent magnet motor is installed on the rotor of the induction motor and can be self-started by the asynchronous torque generated by the rotor guide bar. Compared with induction motor, asynchronous starting permanent magnet synchronous motor (PMSM) has the advantages of high power factor, high efficiency and wide economic operation range. Compared with induction motor, asynchronous starting permanent magnet synchronous motor (PMSM) has a variety of rotor permanent magnet structures, so there are many kinds of PMSM structures. Because of the asymmetry of rotor magnetic circuit of permanent magnet motor, it is difficult for the traditional design theory and analysis method to carry on the effective analysis to the permanent magnet motor. Therefore, it is necessary to use other scientific theories and computer aided to complete the structure design and magnetic circuit design of the motor. However, there are still some problems in the practical application of asynchronous starting permanent magnet synchronous motor, which is mainly caused by the slot torque of the motor and the asymmetry of the rotor magnetic circuit. This paper mainly carries on the research from the following three aspects, its main research content is as follows: 1. The working mechanism of asynchronous starting permanent magnet synchronous motor (PMSM) is analyzed, including the starting characteristic, power characteristic, torque characteristic, power-angle characteristic and grooving torque of PMSM, and the influence on flux and torque of PMSM is analyzed. The factors of power factor and efficiency provide theoretical basis for further research. 2. The structure and magnetic circuit of 5.5kW asynchronous starting permanent magnet synchronous motor are designed. The structure design mainly includes stator and rotor core and tooth slot of permanent magnet motor, armature winding, coordination of slot number, length of magnetizing direction of permanent magnet. The width of permanent magnet and the selection of permanent magnet materials; Magnetic circuit design mainly includes no-load flux leakage coefficient 0, air gap coefficient K? And calculate the polar arc coefficient I? Calculation, etc. In order to minimize the amount of permanent magnet, the Ansoft simulation software is used to model the asynchronous starting permanent magnet synchronous motor (PMSM). In this paper, we first analyze the characteristics of permanent magnet motor with WU and V type in no-load operation, according to the characteristics of magnetic force line distribution, air gap magnetic density, flux leakage coefficient and slot torque of permanent magnet motor, so W and U permanent magnet motor are selected. Secondly, according to the analysis of the no-load operation of the motor, the characteristics of no-load starting and load starting of the W and U type permanent magnet motors are further analyzed and compared. Finally, the W structure permanent magnet motor is selected. Finally, the size of the permanent magnet of the W type permanent magnet motor is changed, and the final result is obtained by comparing the size of the permanent magnet with the minimum amount of the permanent magnet.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341
本文编号：2345215
[Abstract]:The asynchronous starting permanent magnet synchronous motor is similar to the induction motor. The permanent magnet motor is installed on the rotor of the induction motor and can be self-started by the asynchronous torque generated by the rotor guide bar. Compared with induction motor, asynchronous starting permanent magnet synchronous motor (PMSM) has the advantages of high power factor, high efficiency and wide economic operation range. Compared with induction motor, asynchronous starting permanent magnet synchronous motor (PMSM) has a variety of rotor permanent magnet structures, so there are many kinds of PMSM structures. Because of the asymmetry of rotor magnetic circuit of permanent magnet motor, it is difficult for the traditional design theory and analysis method to carry on the effective analysis to the permanent magnet motor. Therefore, it is necessary to use other scientific theories and computer aided to complete the structure design and magnetic circuit design of the motor. However, there are still some problems in the practical application of asynchronous starting permanent magnet synchronous motor, which is mainly caused by the slot torque of the motor and the asymmetry of the rotor magnetic circuit. This paper mainly carries on the research from the following three aspects, its main research content is as follows: 1. The working mechanism of asynchronous starting permanent magnet synchronous motor (PMSM) is analyzed, including the starting characteristic, power characteristic, torque characteristic, power-angle characteristic and grooving torque of PMSM, and the influence on flux and torque of PMSM is analyzed. The factors of power factor and efficiency provide theoretical basis for further research. 2. The structure and magnetic circuit of 5.5kW asynchronous starting permanent magnet synchronous motor are designed. The structure design mainly includes stator and rotor core and tooth slot of permanent magnet motor, armature winding, coordination of slot number, length of magnetizing direction of permanent magnet. The width of permanent magnet and the selection of permanent magnet materials; Magnetic circuit design mainly includes no-load flux leakage coefficient 0, air gap coefficient K? And calculate the polar arc coefficient I? Calculation, etc. In order to minimize the amount of permanent magnet, the Ansoft simulation software is used to model the asynchronous starting permanent magnet synchronous motor (PMSM). In this paper, we first analyze the characteristics of permanent magnet motor with WU and V type in no-load operation, according to the characteristics of magnetic force line distribution, air gap magnetic density, flux leakage coefficient and slot torque of permanent magnet motor, so W and U permanent magnet motor are selected. Secondly, according to the analysis of the no-load operation of the motor, the characteristics of no-load starting and load starting of the W and U type permanent magnet motors are further analyzed and compared. Finally, the W structure permanent magnet motor is selected. Finally, the size of the permanent magnet of the W type permanent magnet motor is changed, and the final result is obtained by comparing the size of the permanent magnet with the minimum amount of the permanent magnet.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM341
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