DC Motor & Control Problem Detection Using Vibration Analysis (29 page booklet)
Highlights:
This comprehensive paper summarizes how to detect problems not only within DC motors, but also with the controls serving them (SCR's, SCR firing cards, comparitor cards, grounding problems, fuse failures, loose connections, etc.).
It also addresses a significant problem occurring in many DC motors caused by electrical current passage through DC motor bearings causing fluting and premature failure of such bearings.
It also includes real-world case histories on DC motor and control problems which have been detected by vibration analysis and then corrected (then following up with vibration analysis to ensure the diagnosed problems were corrected and that no new problems were introduced).
