Abstract
This study develops a condition monitoring system, which includes operating condition monitoring (OCM) and fault diagnosis analysis (FDA). The OCM uses a vibration detection approach based on the ISO 10816-1 and NEMA MG-1 international standards, and the FDA uses a vibration-electrical hybrid approach based on various indices. The system can acquire real-time vibration and electrical signals. Once an abnormal vibration has been detected by using OCM, the FDA is applied to classify the type of faults. Laboratory results indicate that the OCM can successfully diagnose induction motors healthy condition, and FDA can classify the various damages stator fault, rotor fault, bearing fault and eccentric fault. The FDA with the hybrid approach is more reliable than the traditional approach using electrical detection alone. The proposed condition monitoring system can provide simple and clear maintenance information to improve the reliability of motor operations.
Highlights
Taking a large power plant in Taiwan as an example, each of its large thermal generator sets relies on an auxiliary system with numerous high-voltage motors for operation
Voltage total harmonic distortion (VTHD): IEEE Std. 519 [29] was used as a reference for VTHD, which is expressed as a percentage and defined as the square root of the sum of harmonic voltages divided by the fundamental frequency voltage, as shown in Equation (4)
When the displacement is judged to be “Normal” according to NEMA MG-1, the velocity would be used to assess the level of operating condition as per IOS 10816-1; when the displacement is judged to be “Danger” as per NEMA MG-1, the operating condition would be rated as
Summary
Taking a large power plant in Taiwan as an example, each of its large thermal generator sets relies on an auxiliary system with numerous high-voltage motors for operation. As for breakdowns in other components, recent studies focused on the relatively more common eccentricity problems, which were examined in References [19,20,21,22]. The TBM is maintenance performed on equipment based on calendar resources This means that the schedules will be important for routine maintenance. 4.0, thriving developments in considerable the sensor, waste communication, and the TBM may result in over maintenance to prevent of manpower andinformation resources. CBM allows motors to which remainis reliable trend maintenance is condition-based maintenance (CBM), effectivethroughout in accident their service time [23]. Fault diagnosis using a vibration–electrical hybrid approach system for induction motors based it is critically important to develop a condition monitoring system with fault diagnosis usingon a CBM. Vibration–electrical hybrid approach system for induction motors based on CBM
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