Eng-Tips is the largest engineering community on the Internet
Intelligent Work Forums for Engineering Professionals
-
Congratulations waross on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
n+1 and n-1 excitation of crankshaft torsional vibrations
Sorry, I forgot signature...my name is Noisun. Cheers Noisun- noisun
- Post #21
- Forum: Mechanical Acoustics/Vibration engineering
-
Single phase electric motor 500Hz noise
Dear Electricpete, thank you for your thoughts...your first input was the right one (unfortunately)! I tried with an impact test (accelerometer on stator stack, hammer at about the same point, motor still) and a very sharp peak structural resonance at 520 Hz came out. Repeating the same impact...- noisun
- Post #7
- Forum: Electrical Engineering general discussion
-
Single phase electric motor 500Hz noise
Dear GregLocock, thank you for your inputs. I took my time to try what you said. I can't hear 500Hz component noise by myself (I tried, referring my ear to a pure 500Hz sine), because it isn't predominant in the overall sound pressure spectrum...more important are 49 Hz (running speed), 100Hz...- noisun
- Post #4
- Forum: Electrical Engineering general discussion
-
Single phase electric motor 500Hz noise
I'm studying the airborne noise emitted by a single-phase small (less than 100W) electric motor for dishwasher machines. It is a 2 poles motor with capacitor connected to an auxiliary (2 poles) winding very similar to the main winding (capacitor and auxiliary winding are always connected during...- noisun
- Thread
- Replies: 6
- Forum: Electrical Engineering general discussion
