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Progress In Electromagnetics Research C
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DIAGNOSTIC METHOD OF ROTOR CRACKS AND LOCAL DEMAGNETIZATION BY USING THE MEASURING COILS FOR THE PERMANENT MAGNET SYNCHRONOUS MACHINES

By F. R. Ismagilov, V. E. Vavilov, D. V. Gusakov, A. K. Miniyarov, and V. V. Ayguzina

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Abstract:
This paper proves that the use of conventional diagnostic methods of rotor crack and local demagnetization based on the harmonic analysis of the output voltage or counter-electromotive force is effective only with a certain ratio of the number of slots and poles. This statement was proved experimentally. The diagnostic method of the rotor cracks and local demagnetization which is universal for all types of windings and the number of slots of 2-pole synchronous electric machines with permanent magnets is proposed. The mathematical apparatus for the implementation of the proposed method is developed and verified with the help of FEM and experimental studies. All the experimental studies have been carried out for various rotor magnetic systems and a different number of stator slots.

Citation:
F. R. Ismagilov, V. E. Vavilov, D. V. Gusakov, A. K. Miniyarov, and V. V. Ayguzina, "Diagnostic Method of Rotor Cracks and Local Demagnetization by Using the Measuring Coils for the Permanent Magnet Synchronous Machines," Progress In Electromagnetics Research C, Vol. 86, 123-136, 2018.
doi:10.2528/PIERC18070205

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