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  • Users: TN1981
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  1. TN1981

    Shaft rotational speed harmonics and cogging torque.

    To whom it may concern: I am investigating potential causes of some shaft speed related tones in a 3-phase 6 pole electric motor. Using a laser vibrometer, one of the recent motors tested showed signs of elevated 3X, 5X, and 11X shaft speed tones (1X = 240 Hz). This blower was further...

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