Exploring a vibration synthesis process for the acoustic characterization of electric drives

Abstract

A method to efficiently synthesize electromagnetically excited vibrations in electric drives is explored in this paper. The process integrates well into a drive system's design phase and allows to characterize the vibrations over the entire torquespeed range. The study is performed on a traction drive for a hybrid electric vehicle. The influence of different force excitation shapes on the resulting overall vibration is shown and the importance of including tangential forces in the synthesis process is highlighted. The resulting operational deflections at selected operating points are then analyzed. Finally, acoustic maps are introduced as a means to represent and compare predicted and measured acoustic characteristics of speed-variable drives. The synthesized acoustic maps are validated by comparison against their measured counterparts.

Design and Magnetic Noise Reduction of the Surface Permanent Magnet Synchronous Machine Using Complex Air-Gap Permeance

“…The Back EMF is calculated using (2) without stator-winding magnetomotive forces. The Back EMF is thus the coupling variable between the electric model (15) and the magnetic model (2).…”

“…The radial and tangential components of the air-gap magnetic flux density are calculated applying (2). For a 12-slot/ 10-pole motor (CWSPM-12s10p), several results of the hybrid model will be compared with the purely numerical simulations (Fig.…”

Study of suppression of vibration and noise of PMSM for electric vehicles

“…Zeroth‐order spatial electromagnetic force is indicated to be the dominant source of electromagnetic vibration and noise in integer slot machines with a large number of pole pairs for EVs [19–22]. In 2008, Matthias Boesing, a RWTH Aachen University scholar, confirms that zeroth‐order force wave is the main origin of electromagnetic vibration and noise of a 60‐slot‐10‐pole PMSM [12].…”

“…In 2008, Matthias Boesing, a RWTH Aachen University scholar, confirms that zeroth‐order force wave is the main origin of electromagnetic vibration and noise of a 60‐slot‐10‐pole PMSM [12]. In 2011, Matthias proved that different load levels have a great influence on the vibration caused by the zeroth‐order force wave by making use of the linearity of the drive's structural [20]. In [21], the modal superposition method through finite element analysis and experiments has been used by the author to prove that zero‐order force wave is the main source of electromagnetic vibration and noise of 48‐slot‐8‐pole PMSM.…”

Radial Force Control of IPMSM Considering Fundamental Magnetic Flux Distribution

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