Multicriteria diagnosis of synchronous machines — Rotor-mounted sensing system. Rotor signal collector construction

Abstract

As part of an extended research on synchronous machines, a new technique applied to a rotor-mounted sensing system will be introduced. The capabilities of sensing the physical variables over the rotor are quite promising. A 7.5 kW 4 salient-pole synchronous machine with configurable fault scenarios is available for this research. The measurements in the rotor are taken through two sets of 25 slip-rings expressly mounted for this purpose. The sensors installed are four thermocouples, one on each pole; the shaft voltage is measured referred to the ground. The last capability of this system is to measure the current flowing over the damping cage bars. Having more reliable and precise condition monitoring systems will make it possible to define the assessment of the machine with more accuracy. Consequently, making this information available for the operation and maintenance scheduling of industrial plants will lead to more efficient processes through improved operation schemes according to the actual status of the system.