Torsional Vibration Problems and Analyses of Cement Industry Drives

Mayer, Charles B.

doi:10.1109/tia.1981.4503903

Cited by 43 publications

(10 citation statements)

References 5 publications

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“…Shaft cracks, instability, and further serious damages are also possible. Such a situation may induce a high repair cost and a decrease in the factory production as mentioned in [22] and in [54]- [57].…”

Section: B Backlash Phenomenamentioning

confidence: 99%

Detection of Backlash Phenomena Appearing in a Single Cement Kiln Drive Using the Current and the Electromagnetic Torque Signature

Bogiatzidis

Safacas

Mitronikas

2013

IEEE Trans. Ind. Electron.

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Fault diagnosis in electromechanical drives has been widely investigated over the last decades, and many diagnostic methods have been proposed based on the reported faults. Additionally to already published works which have dealt with gear faults inside low reduction ratio gearboxes, this paper aims to present a simple and effective method for the early diagnosis of evolving faults in a high reduction ratio gear transmission system used in cement kiln drives. The under study system basically consists of a three-phase induction motor mechanically connected to a gearbox. The output shaft of the gearbox drives a gear pinion which, in turn, rotates a girth gear rim surrounding the cement kiln. The identification of mechanical vibrations due to backlash phenomena appearing between the pinion gear and the girth gear rim of the kiln is realized using the motor current signature analysis and processing the motor electromagnetic torque. The proposed diagnostic method is presented, analyzing the experimental results from an under-scale laboratory simulating system.

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Section: B Backlash Phenomenamentioning

confidence: 99%

Detection of Backlash Phenomena Appearing in a Single Cement Kiln Drive Using the Current and the Electromagnetic Torque Signature

Bogiatzidis

Safacas

Mitronikas

2013

IEEE Trans. Ind. Electron.

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“…Interaction has been observed in a range of systems, for example sub-synchronous resonance in land based power generation [7,8] causing early fatigue of mechanical components [9], challenges for wind power generation [10,11] causing gearbox failure [12], unpredicted faults in industrial processes such as mills [13], excessive vibration in electric and hybrid-electric vehicle drivetrains [2,14] increasing wear [4], and wave induced instability in marine propulsion systems [15]. Methods for mitigating electro-mechanical interaction include minimising gearbox backlash [16], control scheme disturbance rejection [17] and repositioning of resonant modes through design [18].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Feehally

Damian

Apsley

2016

IEEE Trans. on Ind. Applicat.

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Abstract-The supply of electrical power is usually achieved by a generator, driven from a prime mover, by some form of mechanical drivetrain. Such an electro-mechanical system will have natural resonant modes in both the electrical and mechanical subsystems. The electrical generator provides a coupling between the subsystems, transferring not only useful power but also disturbances between electrical and mechanical domains: these disturbances may excite resonances resulting in cross-domain (electro-mechanical) interaction. This can lead to lifetime reduction in the mechanical components and instability in the electrical network, resulting in poor reliability for the wider system, and potentially catastrophic component failure. Electro-mechanical interaction is particularly critical in power generation systems onboard aircraft, because the generator is driven by a gas turbine via an inherently low-stiffness drive train. It is then critical to identify electro-mechanical interaction at the design stage so that these issues can be avoided. However, predicting the occurrence of interaction, through simulation, is challenging, requiring multi-domain models, operating with different time scales. This paper analyses an aircraft auxiliary power offtake to produce a reduced-order mechanical drivetrain model, allowing the modal frequencies to be predicted and crossdomain interactions to be modelled. A purpose-built electromechanical test platform is used to validate the model and demonstrate how electrical disturbances are passed through the generator to the mechanical system and affect the electrical network. Future research will use the test bed to demonstrate strategies for avoiding or suppressing unwanted interactions.

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“…This gives s × f s = 23.6 Hz, which is the same as the natural torsional frequency of the mechanical system calculated by Eq. (5) [3,7]. However, as the motor speed continues to grow, the slip frequency departs from the natural frequency and the shaft torque starts to decay.…”

Section: Sinusoidal Supplymentioning

confidence: 99%

Cost-Effective Control Scheme for Reduction of Torsional Torque Oscillations in Starting Large Induction Motors

Abdel-Rahim

Shaltout

2006

Electric Power Components and Systems

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This article presents a cost-effective variable frequency drive for starting and operating large three-phase squirrel cage induction motors. The proposed drive employs the constant V/F control scheme, which regulates the rotor frequency such that it is always kept below a predetermined value. This has the effect of drastically reducing the motor shaft torque oscillations and significantly limiting the maximum value of the motor line current. In addition to its simplicity and hence cost-effectiveness, the proposed scheme is shown to be capable of (i) reducing the shaft torque oscillations to approximately 22% of that of the direct on-line start of the large motor, and (ii) limiting the motor line current to approximately 36% of that of the direct on-line start value.

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Torsional Vibration Problems and Analyses of Cement Industry Drives

Cited by 43 publications

References 5 publications

Detection of Backlash Phenomena Appearing in a Single Cement Kiln Drive Using the Current and the Electromagnetic Torque Signature

Detection of Backlash Phenomena Appearing in a Single Cement Kiln Drive Using the Current and the Electromagnetic Torque Signature

Analysis of Electromechanical Interaction in Aircraft Generator Systems

Cost-Effective Control Scheme for Reduction of Torsional Torque Oscillations in Starting Large Induction Motors

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