新型低振噪容错式永磁磁通切换电机设计

发布时间：2018-06-11 19:42

本文选题：容错式永磁磁通切换电机 + 径向力　；参考：《江苏大学》2017年硕士论文

【摘要】：近年来,现代工业对永磁电机的需求越来越高。在对电机振动和噪声要求比较严格的应用场合,振动和噪声成为评价电机性能的重要指标之一,永磁电机的振动和噪声不容忽视。因此,对永磁电机振动噪声产生机理和抑制措施的研究逐渐成为热点。对于永磁电机而言,在保证电机电磁性能不变差的前提下,有效改善电机的振动和噪声具有重要意义。本文针对10槽18极容错式永磁磁通切换电机,提出并比较几种新型定转子结构对电机振动噪声以及电磁性能的影响。首先,构建容错式永磁磁通切换电机有限元模型,对电机的结构参数进行了优化设计。继而,比较新型定转子结构对电机的振动噪声以及电磁性能的影响。最后,对原电机、新型转子斜齿电机和相关硬件控制电路进行了介绍展示,并实验测量两电机的振动加速度。本文的研究成果主要包括以下几个方面:1.已有的容错式永磁磁通切换电机存在着振动噪声大、反电势波形正弦度低等缺点,为了提升电机性能,本文提出了一种新型的定子具有双容错齿结构电机。利用有限元电磁仿真软件,比较两电机的各项电磁性能,主要有空载反电势、平均转矩、转矩脉动、径向力波。对原电机和双容错齿电机进行结构力学分析和声学仿真分析,比较两电机的振动和噪声大小。通过仿真结果可知,新型定子双容错齿永磁磁通切换电机可以明显改善电机振动和噪声,同时电机的电磁性能也能得到一定程度的优化。另外,原电机定子齿局部饱和程度较高,这会使气隙主磁场分布波呈现平顶形状,这种平顶波形会产生低阶径向力波,从而加剧电机的振动和噪声。因此,本文提出一种漏斗形定子齿结构,缓解电机定子齿局部饱和,达到降低振动和噪声的目的。2.为改善已有容错式永磁磁通切换电机的振动和噪声,提出了一种新型转子斜齿结构电机,新型转子斜齿电机在顺时针转动和逆时针转动时会表现出不同的振噪特性。对原电机和转子斜齿电机进行有限元分析,比较两电机平均转矩、转矩脉动和径向力波。通过结构力学分析和声学仿真分析,比较原电机和转子斜齿电机的振动和噪声大小。仿真结果显示,转子斜齿电机在顺时针转动时可以以牺牲少量平均转矩为代价,较大幅度地改善电机的振动和噪声,而逆时针转动时则不能达到降振减噪的目的。本文还分析了两种转子模块化电机对振动和噪声的影响,其中转子齿部开槽模块化电机可以以牺牲少量平均转矩为代价,较大幅度改善电机的振动和噪声。转子轭部开槽模块化电机则不能降低电机的振动和噪声。3.在电机的实际加工和安装过程中,由于受到加工工艺以及装配精度的限制,可能做不到使得电机定转子轴线完全重合,那么转子就会存在不同程度的偏心。当容错式永磁磁通切换电机转子存在静偏心或动偏心时,对电机的振动和噪声产生影响。分析结果表明,无论转子存在静偏心还是动偏心,都会加大电机的振动和噪声,因此,在电机实际制造和安装过程中,要尽量避免转子偏心情况的发生。4.对于具有斜齿转子的容错式永磁磁通切换电机,比较了转子不同斜齿角度时的振动噪声及电磁性能。加工制造转子斜齿电机,并实验测量原电机和转子斜齿电机的振动加速度,验证了理论分析的正确性。
[Abstract]:In recent years, the demand for permanent magnet motor is getting higher and higher in modern industry. Vibration and noise become one of the most important indexes to evaluate the performance of the motor. The vibration and noise of permanent magnet motor can not be ignored. Therefore, the research on the mechanism of vibration and noise reduction of permanent magnet motor and its suppression measures As for permanent magnet motor, it is of great significance to improve the vibration and noise of the motor effectively on the premise of ensuring the constant difference between the electromagnetic performance of the motor. In this paper, the influence of several new type of rotor structure on the vibration noise and electromagnetic performance of the 10 slot 18 pole fault tolerant permanent magnetic flux switching motor is proposed and compared. The finite element model of fault tolerant permanent magnetic flux switching motor is constructed, and the structural parameters of the motor are optimized. Then, the influence of the new stator rotor structure on the vibration noise and the electromagnetic performance of the motor is compared. Finally, the original motor, the new rotor helical gear motor and the related hardware control circuits are introduced, and the experimental measurement two is carried out. The research results of this paper mainly include the following aspects: 1. the existing fault tolerant permanent magnetic flux switching motor has the disadvantages of large vibration noise and low sinusoidal anti EMF waveform. In order to improve the motor performance, a new type of stator with double fault-tolerant tooth structure motor is proposed in this paper. The real software compares the electromagnetic properties of the two motor, including the empty back EMF, the average torque, the torque ripple and the radial force wave. The structural mechanics analysis and acoustic simulation analysis of the original and double fault-tolerant teeth motor are carried out to compare the vibration and noise size of the two motor. The motor can obviously improve the vibration and noise of the motor. At the same time, the electromagnetic performance of the motor can be optimized to a certain extent. In addition, the local saturation degree of the stator teeth of the original motor is high, which will make the distribution wave of the main magnetic field of the air gap present flat top shape, and this kind of flat top waveform will produce the low order direction force wave, thus intensifying the vibration and noise of the motor. In this paper, a funnel-shaped stator tooth structure is proposed to alleviate the local saturation of the motor stator teeth and to reduce vibration and noise..2. is to improve the vibration and noise of the existing fault tolerant permanent magnetic flux switching motor. A new type of rotor helical structure motor is proposed. The new rotor helical gear motor will be table in clockwise rotation and counter clockwise rotation. The original motor and rotor helical gear motor are analyzed by finite element analysis, and the average torque, torque ripple and radial force wave of the two motor are compared. Through structural mechanics analysis and acoustic simulation analysis, the vibration and noise size of the original motor and the rotor oblique tooth motor are compared. The simulation results show that the rotor helical gear motor is clockwise in clockwise rotation. At the expense of a small amount of average torque at the expense of a small amount of torque, the vibration and noise of the motor can be greatly improved, while the anti clockwise rotation can not achieve the purpose of reducing vibration and noise reduction. In this paper, the effects of two kinds of rotor modular motors on Vibration and noise are also analyzed, in which the modular motor of the rotor tooth slotting can sacrifice a small amount of average torque. At the cost, the vibration and noise of the motor are greatly improved. The rotor yoke slotting modular motor can not reduce the vibration and noise of the motor..3. can not make the rotor axis completely coincide with the machining process and assembly precision during the actual machining and installation of the motor. Then the rotor will save. When the rotor of fault tolerant permanent magnetic flux switching motor has static eccentricity or dynamic eccentricity, it affects the vibration and noise of the motor. The results show that the vibration and noise of the motor will be increased regardless of the static eccentricity or the dynamic eccentricity. Therefore, it is necessary to avoid the vibration and noise of the motor in the process of actual manufacturing and installation. The occurrence of rotor eccentricity.4. for the fault tolerant permanent magnetic flux switching motor with a helical rotor, compared the vibration noise and electromagnetic performance of the rotor with different angle of the tooth. The rotor helical gear motor was manufactured and the vibration acceleration of the original motor and the rotor oblique tooth motor was measured experimentally, and the correctness of the theoretical analysis was verified.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM351

【参考文献】