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Vibration control for a variable speed cooling system

  • US 9,817,408 B2
  • Filed: 07/30/2014
  • Issued: 11/14/2017
  • Est. Priority Date: 07/30/2013
  • Status: Active Grant
First Claim
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1. A variable speed cooling and vibration control system, comprising:

  • at least one variable speed motor;

    a variable speed drive (VFD) for controlling the speed of at least one variable speed motor; and

    one or more vibration sensors installed at one or more predetermined locations on the variable speed cooling system;

    a vibration data acquisition system that acquires vibration level data associated with at least one vibration sensor, anda programmable controller in communication with the VFD and the vibration data acquisition system, wherein the programmable controller;

    directs a VFD frequency sweep wherein the at least one variable speed motor sweeps through a range of frequencies;

    determines one or more frequency lockout bands, based on the vibration level data from the vibration data acquisition system and variable speed cooling system vibration specification data, andcommands the VFD to operate the at least one variable speed motor at one or more frequencies outside the one or more frequency lockout bands.

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