Noise-Vibration-Harshness simulation of ultralight vehicle traction drives based on a universal modelling approach

Operating Point Adaptation for NVH-Optimization of Induction Machines

“…In general, the procedure introduced in this paper relates to reduce force excitation. Reducing high amplitudes of force harmonics, which occur in the range of natural frequencies of the structural dynamic, have the highest potential to reduce the noise emissions of induction machine [5,6,8].…”

“…Since the sound pressure level is mainly explained in the spatial and temporal time domain α and t, the radial surface velocity v r is transformed back with an 2-dimensional Fast Fourier transform (FFT) [3,5,6]. …”

“…To receive accurate results, the surface velocity of the induction machine is recorded, using an acceleration sensor on the surface of the induction machine. In general, the radial surface velocity v r shows a direct impact on the sound pressure level with the sound power P [6,8], where…”

“…The electromagnetic force excitation behavior is influenced in order to subsequently reduce noises. This paper shows these operating strategies, explains the theoretical background of the machine behavior changing the operating strategy and draws a comparison between the simulation of a vibration synthesis model [1][2][3][4][5][6] and measurements on the surface of the electrical drive. …”