A method for digitizing the turn-to-turn instrument based on FFT extraction of eigenvalues

According at the problem that inter-turn pressure test requires waveform and it is difficult to find the subtle difference of waveform, a method based on fast Fourier transform and inter-turn pressure test waveform is proposed. The characteristic parameters of the voltage-test waveform were obtained to evaluate the motor state. The feasibility of the method was verified by simulink simulation analysis. Compared with the traditional method, the eigenvalues obtained after the fast Fourier transform are more convenient for the observation and preservation of the results, reduce the subjective judgment of the waveform, and promote the digitization and intelligence of the instrument.