An Investigation into the Dependence of Electric Motor Noise on Design Parameters

Kurzfassung

With the planned increased use of electric motors in commercial aviation, noise management is becoming an increasingly important issue. The research presented in this paper aims to analyze the effect of a limited number of design parameters (e.g. Pole number, Stator Diameter, Slot Width, etc.) on the noise level of surface mounted permanent magnet electric motors. An open source analytical tool was used to design several machines and to establish a database. These machines were then simulated using a commercial electric machine design tool to verify the results of the analytical method and to obtain sound power levels. Using a Random Forrest Model, a sensitivity study was performed on the resulting data to investigate the dependence of the noise level on the design parameters mentioned above. The results of this study are helpful for the development of better noise reduction measures and contribute to an improved understanding of the noise generation mechanisms of electric motors.