By Subrata Karmakar, Surajit Chattopadhyay, Madhuchhanda Mitra, Samarjit Sengupta
This ebook covers the analysis and overview of a few of the faults that could ensue in a 3 part induction motor, specifically rotor broken-bar faults, rotor-mass unbalance faults, stator winding faults, unmarried phasing faults and crawling.
Following a quick advent, the second one bankruptcy describes the development and operation of an induction motor, then stories the diversity of recognized motor faults, a few present thoughts for fault research, and a few necessary sign processing strategies. It contains an in depth literature survey to set up the learn tendencies in induction motor fault analysis.
Chapters 3 to seven describe the review of every of the 5 basic fault varieties. within the 3rd bankruptcy the rotor broken-bar fault is mentioned after which tools of prognosis are defined; (i) analysis of the fault via Radar research of stator present Concordia and (ii) prognosis via envelope research of motor startup present utilizing Hilbert and Wavelet Transforms. In bankruptcy 4, rotor-mass unbalance faults are assessed, and prognosis of either temporary and regular country stator present has been analyzed utilizing assorted options. If either rotor broken-bar and rotor-mass unbalance faults take place concurrently then for id an set of rules is supplied during this bankruptcy. bankruptcy 5 considers stator winding faults and 5 various research suggestions, bankruptcy six covers analysis of unmarried phasing faults, and bankruptcy seven describes crawling and its diagnosis.
Finally, bankruptcy 8 makes a speciality of fault review, and offers a precis of the e-book including a dialogue of clients for destiny examine on fault diagnosis.
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Additional resources for Induction Motor Fault Diagnosis : Approach through Current Signature Analysis
B) Mechanical-related faults: Faults under this classiﬁcation are broken rotor bar, mass unbalance, air gap eccentricity, bearing damage, rotor winding failure, and stator winding failure. (c) Environmental-related faults: Ambient temperature as well as external moisture will affect the performance of induction motor. , also will affect the performance. 3 are in broad sense; stator fault may be of different kinds, and different types of faults may occur in rotor itself. For identiﬁcation, faults in induction motors may be listed as follows—(i) broken bar fault, (ii) rotor mass unbalance fault, (iii) bowed rotor fault, (iv) bearing fault, (v) stator winding fault, (vi) single phasing fault, etc.
This technique is being widely used in industry and its validity has been veriﬁed in  by Stone et al. The stator winding maintenance can be monitored with online partial discharge analyzer (PDA) test . 7 33 Vibration Analysis Induction motor generates vibration and this vibration depends on the radial forces due to the air gap flux. f. wave and permeance. f. wave varies if rotor asymmetries occur and permeance varies with the variation of the air gap. All these variations occur if any fault especially mechanical faults occur in the motor.
It can provide information as the vibration analysis can provide . Moreover sensor required for all other analysis techniques being costlier this MCSA is gaining much importance and researches around this are growing fast. Using MCSA there have been ample research works [6, 17, 36, 40–48]. Data for MCSA may be either steady-state current of motor or the starting current which is transient in nature. Steady-state current is easily available and may be captured from a running motor at any stage.