Int. J. of Vehicle Noise and Vibration   »   2017 Vol.13, No.2

 

 

Title: Influence of the symmetric structure of a wheel hub drive on the vibro-acoustic behaviour of electric vehicles due to magnetic forces

 

Authors: Dominik Stretz; Dominik Nees; Frank Gauterin; Johannes Kolb; Matthias Kurch

 

Addresses:
Institute of Vehicle System Technology, Division of Vehicle Technology, Karlsruhe 76131, Germany
Institute of Vehicle System Technology, Division of Vehicle Technology, Karlsruhe 76131, Germany
Institute of Vehicle System Technology, Division of Vehicle Technology, Karlsruhe 76131, Germany
Schaeffler Technologies AG & Co. KG, Herzogenaurach 91074, Germany
Schaeffler Technologies AG & Co. KG, Herzogenaurach 91074, Germany

 

Abstract: Magnetic forces in electrical machines cause vibrations on the structure and its connected components. This leads to undesired noise and vibration in the total system. This paper deals with explanation and reduction of alternating force generation at the connection point of a motor due to radial forces acting on the stator teeth with an electric wheel hub drive being used as example. These alternating forces have a disturbing effect on the driver in the form of noise or vibrations. In our research, we developed a multi-physical simulation of the system which is compared with an operational vibration analysis from an experiment. The simulation shows that the main cause is the axially asymmetric structure of the housing. We reduced the alternating forces at the connection point by using an axially symmetric structure. An axially symmetric design also of other electric machines is to be expected to significantly improve the vibro-acoustic behaviour.

 

Keywords: magnetic force; structure; acoustic; vibration; wheel hub drive; symmetry; transfer function; eigenforms; excitation; electric drive.

 

DOI: 10.1504/IJVNV.2017.10008788

 

Int. J. of Vehicle Noise and Vibration, 2017 Vol.13, No.2, pp.164 - 186

 

Submission date: 16 Nov 2016
Date of acceptance: 11 Apr 2017
Available online: 02 Nov 2017

 

 

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