Being the surging detection device of the turbo reefer which has the turbo compressor

摘要

PROBLEM TO BE SOLVED: To provide a surge detector and a surge detecting method of a turbo refrigerator accurately detecting a surge while monitoring the operating current to a motor that drives a turbo compressor in the variable speed turbo refrigerator.;SOLUTION: The surge detector of the turbo refrigerator provided with the turbo compressor driven by the motor includes: a rate of change of current detecting means (a differentiation circuit 31) detecting the rate of change of the operating current to the motor; and a surge detecting means (a comparing circuit 33, an off-delay circuit 34, and an on-delay circuit 36) detecting a surge from the rate of change of current detected by the rate of change of current detecting means.;COPYRIGHT: (C)2011,JPO&INPIT