|Electrical machine||Squirrel cage induction motor (SCIM)|
|Supply condition||Run up under sinusoidal current at no load|
|Noise sources||Electromagnetic, aerodynamic, mechanical|
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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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.