Vibration control for a variable speed cooling system
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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Abstract
A vibration control system for a variable speed cooling system includes a programmable controller in communication with a variable frequency drive (VFD). The programmable controller is programmed to command the VFD to operate at frequencies only outside of one or more frequency lockout bands automatically calculated by the programmable controller based on a comparison of newly acquired variable speed cooling system vibration data with previously stored variable speed cooling system vibration specification data.
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Citations
20 Claims
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1. A variable speed cooling and vibration control system, comprising:
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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, and a 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, and commands the VFD to operate the at least one variable speed motor at one or more frequencies outside the one or more frequency lockout bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A variable speed cooling and vibration control system, comprising:
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a variable speed cooling 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 a programmable controller in communication with the VFD; one or more vibration sensors mounted at one or more predetermined locations on the variable speed cooling system; and a vibration data acquisition system configured to acquire vibration level data associated with at least one vibration sensor, and in communication with the programmable controller, wherein the programmable controller; directs a VFD frequency sweep wherein the at least one variable speed motor sweeps through a range of frequencies; polls the vibration data acquisition system to retrieve newly acquired vibration level data, determines one or more frequency lockout bands, based on the newly acquired vibration level data from the vibration data acquisition system and variable speed cooling system vibration specification data, and commands the VFD to operate the at least one variable speed motor at one or more frequencies outside the one or more frequency lockout bands. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of automatically determining variable frequency drive (VFD) frequency lockout bands for vibration control of a variable speed cooling system, the method comprising:
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adjusting the speed of at least one variable speed motor to perform a frequency sweep over a desired frequency band by a variable speed cooling system VFD in response to commands from a programmable controller integrated with the variable speed cooling system; acquiring vibration amplitude data via a data acquisition system during the frequency sweep from one or more vibration sensors mounted at predetermined locations on the variable speed cooling system; calculating, via the programmable controller, frequency lockout bands based on the acquired vibration amplitude data and previously stored vibration amplitude limits; and operating the variable speed cooling system in response to commands from the programmable controller such that at least one variable speed motor of the variable speed cooling system operates at frequencies only outside the calculated frequency lockout bands. - View Dependent Claims (20)
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Specification
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Current AssigneeTrane International Inc. (Trane Technologies plc)
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Original AssigneeTrane International Inc. (Trane Technologies plc)
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InventorsMeeuwsen, Gregory L
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Primary Examiner(s)Ali, Mohammad
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Assistant Examiner(s)Booker, Kelvin
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Application NumberUS14/447,100Publication NumberTime in Patent Office1,203 DaysField of SearchNoneUS Class CurrentCPC Class CodesF16F 15/002 characterised by the contro...G05D 19/02 characterised by the use of...G06F 30/00 Computer-aided design [CAD]
