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Large rolling synchronous motor damper bar Failure Analysis and Countermeasures

Author: XueTao
Tutor: ZhangYingWeiï¼›ShenGuoFang
School: Northeastern University
Course: Control Engineering
Keywords: Rolling Synchronous motors Damper bar Failure Analysis Failure Countermeasures
CLC: TM341
Type: Master's thesis
Year: 2009
Downloads: 66
Quote: 0
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Abstract


Hot rolling mill main drive motor of a Siemens AC-AC inverter salient pole synchronous motor . Motor power 12000kW, is currently the single largest capacity of the mill . In conventional open the motor cover inspection, found that the presence of the rotor damper winding damping of loosening and fracture failure , and there are growing signs of poor , so that the motor is running situation is very grim. Synchronous motor damping are very few examples of fracture failure occurs , treatment experience are more poor. Research projects for the protection of the normal production of hot-rolled , to ensure the safe operation of large motors , avoiding unplanned downtime and maintenance , has important significance. Summed up through the practice of the damping characteristics of failure and repair technology point for the design and manufacture of these motors provide a reference experience . The topics, large rolling synchronous motor failure problems of damper bar . This article describes the performance of the motor failures and similar domestic motor fault conditions , analysis of the electrical characteristics of the damping of failure . Damping of the generation mechanism of defects , analyze the root causes damping of fracture , right damper bar fault trends reasoning . According to the fault development mechanism , by monitoring the motor operating parameters, including motor voltage , current, temperature, etc. External Representation amount of damping of the motor development of fault detection, and the body of the motor vibration dynamics testing and analysis , the development of quantitative evaluation index damper bar defects , at different stages of an accurate assessment of the motor running, predictive failure development. Meanwhile , according to the big motor symptoms and characteristics of synchronous motor damper bars defect treatment targeted rehabilitation program , elaborated repair process , summarize the main points of restoration techniques .

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Synchronous motor
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