Application of Magnetic Fields To Aid The Detection and Diagnosis of Induction Motor Drive Faults
University of Wales
MetadataShow full item record
A novel approach to the collection of fault related data associated with induction motor drives is presented. The stator to rotor magnetic flux of an induction motor is monitored by a number of strategically positioned search coils, each wound around a single stator pole. The data collected is in the form of time records of the induced voltage in the coils and is subsequently used to form the data base for a fault detection and diagnosis strategy. Voltage waveforms obtained from a single coil and from two coils connected in series are obtained whilst the system is subjected to a range of applied electro-mechanical faults. The applied faults are applied both to the mechanical load and to the induction motor itself. A comparison is made of the efficacy of using two search coils compared to employing a single coil for fault detection. The fault related data is collected under both steady-state and accelerating running conditions. Strictly the acceleration period waveforms are non-stationary, however, since the time dependant frequency changes are relatively slow, the author applied the FFT technique to both steady-state derived data and the acceleration period derived data. Processing is carried out on both the time domain and the corresponding frequency domain data. The non-stationary nature of the acceleration period records is taken into account and the Wigner-Ville technique is employed to establish a time-frequency-distribution. Amplitude-time-frequency 3-D representations are produced, from which the amplitude versus time activity of a typical acceleration period component frequency is presented.
Showing items related by title, author, subject and abstract.
Affsect coupling in the lower extremity joints has on the consistancy of the step characteristics in the early acceleration phase of the sprint running Hatton, Josh (University of Wales Institute Cardiff, 2009)Purposes: This study was conducted to develop the understanding of the influence variability in the coordination between the lower extremity joints in the support leg have on the consistency of the step characteristics in ...
Influence of Age and Maturation on Fitness Development, Trainability And Competitive Performance In Youth Silat Shapie, Mohamad Nizam Mohamed (Cardiff Metropolitan University, 2011)Silat Olahraga, also known as Silat, is a popular combat sport, but little is known about the sports in terms of sport science of physiological demands and characteristics. This is particularly true for the adolescent ...
Collins, Joseph (Cardiff Metropolitan University, 2014)This study looked at movement patterns in elite tennis in relation to injury risk and gender difference at the US Open grand slam tennis event. The aim of the study was to identify what movement patterns that were deemed ...