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System and Method of Integrated Vibration Monitoring in Motor Drives

  • US 20190310130A1
  • Filed: 06/24/2019
  • Published: 10/10/2019
  • Est. Priority Date: 04/10/2017
  • Status: Active Grant
First Claim
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1. A method for monitoring vibration in a motor connected to a motor drive, the method comprising the steps of:

  • generating a torque reference signal with the motor drive, wherein the torque reference signal corresponds to desired operation of the motor connected to the motor drive;

    determining an estimated torque signal in a condition monitor module executing on the motor drive, wherein the estimated torque signal corresponds to a load present on the motor;

    storing at least one frequency at which the motor drive monitors vibration in a memory device of the motor drive;

    generating a frequency response of the estimated torque signal with the controller, wherein the frequency response includes a magnitude of vibration at the at least one frequency;

    reading at least one threshold from the memory device, wherein each threshold corresponds to one of the at least one frequencies;

    comparing the magnitude of vibration in the frequency response to the threshold for each of the at least one frequencies; and

    setting a status flag on the motor drive when the magnitude of vibration in the frequency response is greater than the threshold of the corresponding frequency stored in the memory device.

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