摘要
内置式永磁同步电机具有高效率、高功率密度等优势,被广泛应用在各类驱动领域。本文以某用途48槽8极内置式永磁同步电机为研究对象,推导了径向电磁力波公式,分析了其影响电机电磁噪声的主要阶次,采用转子表面开圆弧形辅助槽的方法来削弱电磁噪声。通过有限元计算分析了优化前后电机的气隙磁场和电磁力密度变化,基于Workbench平台,仿真分析了电机的振动噪声。结果表明采用开辅助槽的转子结构减少了气隙磁场谐波,降低了全工况范围内影响电机电磁噪声的主要阶次电磁力密度,削弱了电机的振动噪声。
Because of the advantages of high efficiency and high power density,interior permanent magnet synchronous motor is widely used in various drive fields.This article takes a 48-slot 8-pole interior permanent magnet synchronous motor for a certain purpose as the research object.The radial electromagnetic force formula is derived,and the main orders that affect the electromagnetic noise of the motor are analyzed,an optimization method with arc-shaped auxiliary slots on the rotor surface to weaken electromagnetic noise.The air gap magnetic field and electromagnetic force density changes of the motor before and after optimization are analyzed by finite element calculation.Based on the workbench platform,the vibration and noise of the motor are simulated and analyzed.The results show that the use of the rotor structure with auxiliary slots reduces the air gap magnetic field harmonics and the main order electromagnetic force density that affects the electromagnetic noise of the motor in the full range of working conditions,and the electromagnetic noise has been reduced.
出处
《日用电器》
2021年第5期11-14,19,共5页
ELECTRICAL APPLIANCES
关键词
内置式永磁同步电机
径向电磁力波
电磁振动噪声
辅助槽
interior permanent magnet synchronous motor
radial electromagnetic force wave
electromagnetic vibration and noise
auxiliary slot
