Title :
Efficiency in the detection of three important faults in induction motors through external magnetic field
Author :
Constantin, Alexandru-Ionel ; Fireteanu, Virgiliu
Author_Institution :
EPM-NM Lab., Politeh. Univ., Bucharest, Romania
Abstract :
This paper studies three types of faults in induction motors - a short circuit in the stator winding, a broken bar in the rotor squirrel-cage and a dynamic eccentricity of the rotor. The efficiency of faults detection, expressed through the ratio of the two rms values of the output voltage of coil sensors, or through the ratio of the two amplitudes of particular harmonics of this voltage for faulty, respectively healthy motor operation, is evaluated for no-load and for loaded motor operation. Low harmonics, with frequency between 0.5 Hz and the supply frequency 50 Hz and high harmonics, with the frequency in the range (12.5 .... 1500) Hz were considered.
Keywords :
fault diagnosis; finite element analysis; induction motors; magnetic fields; rotors; stators; broken bar; coil sensors; external magnetic field; fault detection; induction motors; loaded motor operation; rotor dynamic eccentricity; rotor squirrel-cage; short circuit; stator winding; Circuit faults; Fault detection; Harmonic analysis; Induction motors; Magnetic fields; Rotors; Sensors; coil sensors; external magnetic field; fault; fault detection; finite element; harmonics; induction motor;
Conference_Titel :
Advanced Topics in Electrical Engineering (ATEE), 2015 9th International Symposium on
Conference_Location :
Bucharest
DOI :
10.1109/ATEE.2015.7133843
