نتایج جستجو برای: stator fault

تعداد نتایج: 67833  

Journal: :ISA transactions 2016
Elhoussin Elbouchikhi Vincent Choqueuse Mohamed Benbouzid

Condition monitoring of electric drives is of paramount importance since it contributes to enhance the system reliability and availability. Moreover, the knowledge about the fault mode behavior is extremely important in order to improve system protection and fault-tolerant control. Fault detection and diagnosis in squirrel cage induction machines based on motor current signature analysis (MCSA)...

2008
Jan Pedersen

fast rise-time voltage surges surges from a circuit breaker closing can lead to an electrical breakdown of the turn insulation in motor srator windings [1]. If the turn insulation is of an insuffcient thickness or has aged in service, the insulation will puncture when a short rise-time voltage surge occurs. Punctured turn insulation allows for a very high circulating current to flow into the af...

2004
J. Penman H. G. Sedding

Motors are critical components for electric utilities and process industries. A motor failure can result in the shutdown of a generating unit or production line, or require that redundant plant be utilized to circumvent the problem. One major cause of failures is breakdown of the tum insulation leading to puncture of the groundwall. Early detection of intertum shorts during motor operation woul...

Journal: :Ultrasonics 2014
V Bolborici F P Dawson M C Pugh

Piezoelectric traveling wave rotary ultrasonic motors are motors that generate torque by using the friction force between a piezoelectric composite ring (or disk-shaped stator) and a metallic ring (or disk-shaped rotor) when a traveling wave is excited in the stator. The motor speed is proportional to the amplitude of the traveling wave and, in order to obtain large amplitudes, the stator is ex...

2016
Neelam Mehala

Condition monitoring and fault diagnosis of engineering plant has increased recently because of the widespread use of automation and consequent reduction in direct human-machine interaction to supervise the motor drive system operation. With advances in digital technology in recent years, adequate data processing capability is now available on cost-effective hardware platforms, to monitor motor...

2013
Vinko Lešić Mario Vašak Nedjeljko Perić Gojko Joksimović Thomas M. Wolbank

Faults of wind turbine generator electromechanical parts are common and very expensive. This paper introduces a generator fault-tolerant control scheme for variable-speed variable-pitch wind turbines that can be applied regardless to the AC generator used. The focus is on generator stator isolation inter-turn fault that can be diagnosed and characterised before triggering the safety device. An ...

2015
Samieh Abusaad Riliang Zhang Fengshou Gu Andrew D. Ball

Observer based approaches are commonly embedded in sensorless variable speed drives for the purpose of speed control. It estimates system variables to produce errors or residual signals in conjunction with corresponding measurements. The residual signals then are relied to tune control parameters to maintain operational performance even if there are considerable disturbances such as noises and ...

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