Color Index Transformation for Time-Frequency Analysis
The transformation of color indexes is proposed for time-frequency analysis. The functions are to transform the colors results from the STFT of stator phase plotting. The equations can be divided into functions for rotor faults and stator faults. For rotor fault detection, the function can be expressed here as (7) And for stator fault detection, the function can be expressed here as (8) where f is any specific frequency, fe is electrical frequency or main frequency, s is frequency slip calculated from mechanical frequency and electrical frequency. Hence Eq (7) and Eq. (8) are a proposed function of color index transformation (TRANS)