Self-calibrating control methods and systems for refrigeration systems
A self-calibrating method is described for protecting a motor driving a refrigerant compressor in a refrigeration system which is cycled ON and OFF during operation. The method comprises: determining a compressor motor reference loading at a relatively early time during a compressor ON cycle by allowing a stabilization interval to elapse during which the refrigeration system stabilizes and the compressor motor is still lightly loaded, and then sensing and storing at least a representation of compressor motor loading as the reference loading; and thereafter, during each ON cycle, at least periodically sensing at least a representation of prevailing compressor motor loading, comparing the prevailing loading to the reference loading, and de-energizing the compressor motor if the prevailing loading exceeds a high load threshold loading established as a predetermined function of the reference loading.
- Assignee:
- General Electric Co., Louisville, KY
- Patent Number(s):
- US 4653285
- OSTI ID:
- 6874379
- Resource Relation:
- Patent File Date: Filed date 20 Sep 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BUILDINGS
REFRIGERATORS
COMPUTERIZED CONTROL SYSTEMS
CALIBRATION
COMPRESSORS
ELECTRIC MOTORS
REFRIGERANTS
TIME DEPENDENCE
CONTROL SYSTEMS
FLUIDS
MOTORS
WORKING FLUIDS
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)