REFRIGERATION SYSTEM WITH MULTIPLE CENTRIFUGAL COMPRESSORS AND LOAD BALANCING CONTROL

摘要

A refrigeration system with two or more electric motor driven centrifugal gas compressors to a single common load circuit is provided with electric circuit interconnections for the respective electric controls of the movable capacity controlling means of the respective compressors such that increased current drawn by the electric motor of a more heavily loaded one of the compressors is effective to adjust the respective capacity control means and reduce the capacity of that compressor to balance the current drawn by the other motors and compressors and thus evenly divide the single load between the two or more compressors.