Title :
Small induction motor noise calculation
Author :
Ishibashi, Fuminori ; Kamimoto, Katsumi ; Noda, Shinichi ; Itomi, Kazunobu
Author_Institution :
Dept. of Electr. Eng., Shibaura Inst. of Technol., Tokyo, Japan
Abstract :
There has been an increasing demand for a quiet induction motor. Electromagnetic noise is jarring to the ear. Most offensive electromagnetic noise is generated when the natural frequencies of the stator coincide with or are close to the frequencies of the magnetomotive forces. In this paper, electromagnetic noise is calculated by boundary element method (BEM) program using the electromagnetic forces of Maxwell stress. The natural frequency and behavior of the stator are calculated by mechanical finite element method (FEM), considering the contact between stator core and frame. Spring elements are introduced between the stator frame and the stacked core. Vibration is calculated by mechanical FEM. Calculated and experimental noise level were within 3 dB(A) at 1200 and 4080 Hz.
Keywords :
acoustic noise; boundary-elements methods; electromagnetic forces; finite element analysis; induction motors; stators; vibrations; 1200 Hz; 2.2 kW; 200 V; 4080 Hz; 60 Hz; BEM program; Maxwell stress; boundary element method; contact condition; electromagnetic forces; electromagnetic noise; magnetomotive forces; mechanical FEM; mechanical finite element method; natural frequency; noise calculation; small induction motor; stacked core; stator core; stator frame; stator natural frequencies; vibration calculation; Boundary element methods; Ear; Electromagnetic forces; Electromagnetic interference; Frequency; Induction generators; Induction motors; Noise generators; Stator cores; Stress;
Journal_Title :
Energy Conversion, IEEE Transactions on
DOI :
10.1109/TEC.2002.808415
