This article describes the dynamics analysis of the compressor rotor in a newly designed centrifugal chiller using commercial design software, DyRoBeS. The rated rotation speed is 6,000 rpm for the single shaft system. The first critical speed is 8,673 rpm, the second critical speed is 11,320 rpm, and the third critical speed is 14,185 rpm. The first second critical speed of the rotor is found to be 20% higher than the rated rotation speed, which completely meets the design requirement.