The Electromagnetic Vibration Analysis of an Automobile Alternator by the Substructure Synthesis Method

Abstract

To reduce the noise emitted from the automobile alternator tends to serious subject recently especially concerning with improvement of amenity of driving. This paper intends to simulate the vibration of the alternator by substructure synthesis method. This method consists of the following two stepts: (1) Division of the alternator into four substructures, i. e. a stator, two housings and a rotor, and measurement of the transfer function for each substructure by the impact testing with a FFT analyzer. (2) Synthesis of the transfer function for the total structure by using the computer. Obtained results is applicable to the alternator to estimate its noise peak frequencies.