| Title |
Analysis of the Magnetic Noise for Large Power Induction Motors at Loading Operation |
| Authors |
권병훈(Hong, Gil-Dong) ; 전태원(Chun, Tae-Won) ; 이홍희(Lee, Hong-Hee) ; 김흥근(Kim, Heung-Gun) |
| Keywords |
Electromagnetic noise ; Flux density ; Induction motor ; Rotor slot |
| Abstract |
When a squirrel cage induction motor is loaded, the magnetic noise can increase depending on the load current. It is due to the variation of air gap harmonic fluxes from the rotor current induced by loading. This unfavorable noise can be anticipated by analysing the radial force waves in the air gap, the mode shapes of them, and stator core natural frequencies at each mode. With the experimental tests with the different rotor slot numbers, the variation of magnetic noise depending on the load current is studied and the method to reduce the magnetic noise is suggested with the newly developed magnetic noise analysis program. |