| Title |
A Study of Rotor Fault Detection for the Induction Motor Using Axial Leakage Magnetic Flux |
| Authors |
Dae-Chul Shin ; Young-Hwan Kim |
| Keywords |
Flux coil ; Axial leakage flux measurement ; Rotor bar failure ; Rotor bar passing frequency |
| Abstract |
The second part of paper related rotor failure is to evaluate that the axial magnetic flux measurement could be used as a tool of the condition monitoring system for the induction motor and to develope the diagnostic algorithm for the various fault in the electric motors. The magnetic leakage flux signal is captured by the flux coil located at the end of motor without the disturbance of the operation. And the signal is analyzed both time and frequency domain to detect the failure of the motor. Specific signature can be described in time and frequency domain for each fault of the motor. The experimental test found that the rotor failures - broken rotor bar, broken end ring and rotor eccentricity, could be detected from the spectrum with high resolution. The method of detecting the rotor fault was found by analysing the specific frequency and the sideband of the rotor bar pass frequency from axial leakage flux spectrum. In addition the optimal flux coil and measuring equipment for the axial leakage flux measurement was verified and the diagnostic method for the detection of the rotor related failure was developed. |