Halbach结构永磁电机的电磁振动与噪声分析  

Electromagnetic Vibration and Noise Analysis of Halbach Permanent Magnet Motor

作　　者：卢希浩 乔鸣忠[1] 张弛 LU Xihao;QIAO Mingzhong;ZHANG Chi(College of Electrical Engineering,Naval Engineering University,Wuhan 430000,Hubei,China)

机构地区：[1]海军工程大学电气工程学院,湖北武汉430000

出　　处：《电气传动》2023年第4期15-22,共8页Electric Drive

基　　金：国家自然科学基金(51877212)。

摘　　要：针对转子为Halbach结构的永磁电机进行额定功率下的电磁振动和噪声分析,建立了永磁电机径向力波的解析表达式,并分析了引起振动和噪声的两类主要力波,通过解析法确定了电机的主要噪声源。为了表征Halbach结构电机的电机特点及其振动噪声性能,比较了Halbach结构和普通径向充磁结构的两台电机,针对这两台电机分别进行气隙磁密的分析,以及振动和噪声的比较。对比分析结果表明,Halbach结构的永磁电机转子轭部更薄,重量更轻,气隙磁密正弦度更高。但由于径向气隙磁密3次谐波含量的不同,Halbach结构永磁电机的主要激振频率下的振动加速度幅值相比传统径向充磁结构的永磁电机高出9.56%,总声压级高出0.65 dB。分析结果为机泵一体化装备的电机选择和设计提供了研究基础。In view of the electromagnetic vibration and noise analysis of permanent magnet motor with Halbach structure at rated power,the analytical expression of radial force wave of permanent magnet motor was established,and two kinds of main force waves which cause vibration and noise were analyzed.The main noise sources of the motor were determined by analytic method.In order to characterize the motor characteristics of the Halbach structure motor and its vibration and noise performance,two motors of Halbach structure and common radial magnetization structure were compared.For these two motors,the analysis of the air gap flux density and the comparison of vibration and noise were carried out.The comparative analysis results show that the permanent magnet motor rotor yoke of Halbach structure is thinner,lighter,and the air gap flux density is more sinusoidal.However,due to the different third harmonic content of radial air gap flux density,the vibration acceleration amplitude under main excitation frequency of Halbach permanent magnet motor are 9.56%higher than those of traditional radial magnetization permanent magnet motor,and the total sound pressure level is 0.65 dB higher.The analysis results provide a research foundation for the selection and design of the motor of the integrated pump-mechanical equipment.

关 键 词：Halbach结构充磁 传统径向充磁 永磁同步电机 振动 噪声 

分 类 号：TM351[电气工程—电机]