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PROJECT TITLE :

Acoustic Noise Analysis of a High-Speed High-Power Switched Reluctance Machine: Frame Effects

ABSTRACT:

This paper examines the effect of frame on the acoustic noise and vibration of a high-speed and high-power switched reluctance machine (SRM). 5 sorts of frame/ribs are investigated, where different frame thicknesses, types of cooling ribs, and frame shapes have been analyzed. For this purpose, a 12/8 SRM has been designed at twenty two 00zero r/min and a hundred and fifty kW and 2 stages are applied. In the first stage, a replacement equivalent stiffness of the frame is utilised so as to estimate the resonant frequencies for different frame shapes. The paper provides a mathematical calculation method and evaluates its effectiveness with finite-component simulations. The results indicate an improvement between 4percent and twenty fivep.c in the estimation natural frequencies. The second stage includes the vibration and acoustic noise analysis using three-D finite-part methodology. Considerations for acoustic noise reduction in high-speed SRM using completely different frame varieties and cooling ribs are mentioned. Notably, radial and screw-kind configurations represent a better resolution to decrease the sound pressure level up to 12 dB.


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