| Application | Railway |
| Electrical machine | Squirrel cage induction motor (SCIM) |
| Supply condition | Run up under sinusoidal current at no load |
| Noise sources | Electromagnetic, aerodynamic, mechanical |
| See also |
Measurement set-up
Noise is measured at 1 m from induction motor.
Sound file and spectrograms
Sound of a traction induction machine during run-up under sinusoidal supply
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E-NVH interpretations
This sound file illustrates the noise of an induction motor at starting in railway traction application, when fed by a sinusoidal voltage source (no effect of Pulse Width Modulation). High pitch, whining noise comes from slotting effects.