School of Electrical and Computer Engineering Georgia Institute of Technology
Title: Health Monitoring and Fault Detection of Claw-pole Generators
The ‘claw-pole’ type synchronous generator is the heart of virtually all automotive electric power systems. The failure of such a generator is considered to be a so-called “walk-home” incident leaving a motorist stranded. Timely and accurate detection of generator problems will not only decrease “walk-home” incidences but will also significantly decrease misdiagnoses, thereby resulting in significant warranty cost savings for US auto manufacturers. This seminar will present methods to detect common incipient faults of claw-pole generator using only sensors that are already available in the automotive electric power system. A commercial claw-pole generator has been reverse-engineered and modeled with finite-element software. Spectral analyses are performed on the measured generator voltages and currents. Several important fault signatures in the voltage and current spectra are identified and discussed. Incipient faults that are successfully detected include: serpentine belt slip, serpentine belt defect, stator turn-to-turn fault, rotor eccentricity, and worn bearing. Although the proposed condition monitoring technique is originally designed for claw-pole generators, it may be extended to other synchronous generators with a rectified DC link.
Files: [ Abstract ]