电机的噪声源分为以下几类:磁噪声、通风噪声和轴承噪声。1.噪声源1.1磁噪声在旋转电机中,感应噪声起源于空气隙中的谐波磁场。由于气隙中产生麦克斯威尔拉力招致铁芯迭片径向振荡,这些振荡经过机壳传递到周围空气。为了计算激发力,唯一要考虑的是谐波磁场,也就是在定 Motor noise sources are divided into the following categories: magnetic noise, ventilation noise and bearing noise. 1. Noise Sources 1.1 Magnetic Noise In rotating electrical machines, induced noise originates from the harmonic magnetic field in the air gap. As the Maxwell force generated in the air gap causes core lamination to oscillate radially, these oscillations are transmitted through the casing to the surrounding air. In order to calculate the excitation force, the only thing to consider is the harmonic magnetic field, which is fixed