Noise of a traction induction motor under sinusoidal supply at no load

Summary of e-NVH sound sample
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
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.

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