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Several unusual problems involving lateral vibration and torsional vibration have been seen recently in systems equipped with variable frequency drives and different types of driven equipment. The drives and motors are from different manufacturers and vary widely in size. The vibrations seem to be consistent in that there is a vibration frequency that remains constant as the shaft speed of the motor changes. Sometimes the vibrations are seen in accelerometer readings, but more consistently, the vibrations are torsional. Changes in the VFD control system have helped achieve satisfactory operating conditions in systems that originally could not run without experiencing failures. Field testing and modeling have been essential to diagnose and solve the problems.
Your Price $195.00
List Price $195.00