Study on Electromagnetic Noise of Alternator at High-Speed Rotation

Abstract

Reduction of the noise emitted from the automobile alternator has recently become a serious issue, and tangible especially concerning with improvement of the engine noise. In order to design a quiet automobile alternator, a designer needs to anticipate all important resonant frequencies. We simulated the electromagnetic vibration behavior of the rotor using experimental modal analysis and finite element method analysis. The results obtained are applicable to alternator design for reduction.