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Title: Condition monitoring and fault diagnosis of three-phase induction motors
Author: Liang, Bo
ISNI:       0000 0001 3609 6110
Awarding Body: University of Manchester : University of Manchester
Current Institution: University of Manchester
Date of Award: 2001
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It is well known there are three main approaches to maintenance of machinery, namely breakdown maintenance, scheduled maintenance and preventive maintenance. Breakdown maintenance is practised when machines are operated until they fail before maintenance is carried out. This out-of-date maintenance policy is slowly being abandoned by industry. Scheduled maintenance relates to interrupting machinery at regular intervals for the purposes of maintenance and this policy is still being used in many areas even though it is expensive one. The third maintenance policy is that of preventive maintenance. This approach aims to perform machinery maintenance just before a fault occurs and therefore is used to optimise the maintenance function. The basis of this approach is fault detection, severity assessment and fault diagnosis collectively referred to as condition monitoring. The objective of machinery condition monitoring is to obtain the earliest possible warning of incipient damage or malfunction and to assist in the diagnosis of the subsequent cause. There are many books that focus on condition monitoring and fault diagnosis [1-3]. According to Matthew [4], machine condition monitoring is concerned with obtaining data that would aid in evaluating machinery mechanical and electrical integrity. It is the measurement of various parameters related to the mechanical and electrical condition of the machinery such as vibration, acoustic emission, temperature, oil pressure, oil debris, voltage, current, conductivity and corrosion which make it possible to determine whether the machine is healthy. In addition machinery models can be established for simulating and predicting the trend of changing parameters. These are parameters such as vibration, temperature, pressure, current and voltage that change as a result of differing operating condition, thus providing the maintenance engineer with prior knowledge that may be used for maintenance or improving the performance of the machine. It is generally accepted that condition monitoring offers many advantages.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available