IMBALANCE CORRECTION METHOD AND IMBALANCE CORRECTION AMOUNT CALCULATION DEVICE FOR ROTOR

摘要

An imbalance correction method by which imbalance of a rotator is corrected measures the vibration state of the rotator before provisional correction and the vibration state of the rotator after the provisional correction in a plurality of rotational speeds within a determination rotational speed range in order to make vibration values within the determination rotational speed range below the standard (S1, S3). A range of set of the terminal points of correction vectors for obtaining a vibration value which satisfies a vibration standard is calculated for each of the rotational speeds from vibration vectors in the rotational speeds (S4). A definite correction vector is selected from correction vectors having the terminal points in a region in which the ranges of set calculated for each of the rotational speeds overlap one another among a plurality of the correction vectors. A definite correction amount and a definite correction phase are set on the basis of the definite correction vector (S5). The imbalance of the rotator is corrected on the basis of the definite correction amount and the definite correction phase (S6).