- Patent Title: Start-stop control systems and methods for gas foil bearing machine
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Application No.: US17009535Application Date: 2020-09-01
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Publication No.: US11644227B2Publication Date: 2023-05-09
- Inventor: Michael D. Oakley , Zheji Liu , Michael M. Perevozchikov , Matthew J. Swallow
- Applicant: Emerson Climate Technologies, Inc.
- Applicant Address: US OH Sidney
- Assignee: Emerson Climate Technologies, Inc.
- Current Assignee: Emerson Climate Technologies, Inc.
- Current Assignee Address: US OH Sidney
- Agency: Armstrong Teasdale LLP
- Main IPC: F25B49/02
- IPC: F25B49/02 ; F25B41/20 ; F25B31/02
Abstract:
An HVAC system includes an unloading device, a centrifugal compressor, a gas foil bearing, a VFD and a controller. The controller is programmed to start the centrifugal compressor from a stopped condition by operating the unloading device to remove a load from the centrifugal compressor, accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor, running the motor for a period of time, operating the unloading device to apply the load to the centrifugal compressor, and accelerating the motor to the operating speed.
Public/Granted literature
- US20220065513A1 START-STOP CONTROL SYSTEMS AND METHODS FOR GAS FOIL BEARING MACHINE Public/Granted day:2022-03-03
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