Synchronous motor rotor winding turn-to-turn short circuit fault diagnosis method based on multi-source information

• Main Authors: LI YONGGANG, HOU YUEJIA
• Format: Patent
• Language: Chinese; English
• Published: 09.08.2022
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS; TESTING

The invention provides a synchronous motor rotor winding turn-to-turn short circuit fault diagnosis method based on multi-source information. The synchronous motor rotor winding turn-to-turn short circuit fault diagnosis method comprises the following steps: acquiring exciting current, rotor vibration and stator vibration signals of a synchronous motor working normally and under different rotor winding turn-to-turn short circuit working conditions in real time; converting the one-dimensional time sequence signal into a two-dimensional grayscale image by using a signal-image conversion method; respectively inputting the two-dimensional grayscale images of the excitation current signal, the rotor vibration and the stator vibration into the optimal two-dimensional CNN model for training to obtain a fault diagnosis loss function and diagnosis accuracy of a single signal, and determining basic trust distribution; and performing decision fusion on the fault diagnosis accuracy rates of the three evidence bodies by u