Optimum Noise Levels in Induction Motors Design Measures, Testing Norms and Assessment

摘要

A case study on a high-voltage motor has clearly established that the major reason fo magnetic noise is the slot combination. Change in the number of rotor slot with the same cross section had given rise to the noise level reduction of 10.5 -12 dB(A). No attempt was made to reduce the air- borne noise,rnThis paper has described salient features of noise generation and controlling the same in a rotatingrnelectrical machine. The fact that the design of electric machine has to evolve the methodology to look for noise-worthiness, in addition to electromagnetic and thermal aspects.