Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Effect of unbalance in voltage supply on the detection of mixed air gap eccentricity in an induction motor by Motor Current Signature Analysis(2011) Rajalakshmi Samaga, B.L.; Vittal, K.P.; Jhunjhunwala, V.K.Condition monitoring units are employed in industries to monitor the health of the machines continuously. Air gap eccentricity fault is one of the asymmetrical faults which can result in the machine failure. Motor Current Signature Analysis and Vibration Analysis are the two most popular methods used for eccentricity fault detection in the induction motor. In this paper, a study conducted on an induction motor to analyse the effect of supply voltage unbalance on the method of eccentricity fault detection by Motor Current Signature Analysis is presented. A dynamic model of the induction motor suffering from air gap eccentricity and has the capability to take unbalance supply voltage is developed and the results obtained by simulating this model are validated by the experiments conducted on an induction motor suffering from inclined mixed eccentricity and fed with unbalance voltage supply. © 2011 IEEE.Item Inclined mixed air gap eccentricity detection method for an induction motor(IEEE Computer Society, 2014) Rajalakshmi Samaga, B.L.; Vittal, K.P.Significant number of research articles on axial uniform mixed air gap eccentricity detection methods in three phase squirrel cage induction motor are reported in literature. Most often, machines suffer from non uniform axial air gap eccentricity. In this paper, a study conducted on a three phase squirrel cage induction motor suffering from inclined mixed air gap eccentricity is presented and a new parameter is introduced to detect the inclined eccentricity fault. Experiments were conducted on 3 phase squirrel cage induction motor to show the impact of inclined mixed air gap eccentricity on dq components of stator currents. To validate the experimental results, mathematical expressions and modeling and simulation results are presented. The paper concludes with a note that an eccentricity detection unit with dq components of stator currents in synchronous reference frame as detection parameters can be embedded in the controller circuit to monitor the health of the machine. © 2014 IEEE.