A study for on-line transfer function analysis, in realizing higher speed response adjustment, in association with variable speed rolling mill motor drive system

Tamaoki, Toshifumi; Takanezawa, Makoto; Lu, Zengjun; Xiao, Shen; Kimoto, Masahide; Morita, Noboru

doi:10.1109/ipec.2010.5542378

Cited by 3 publications

(2 citation statements)

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“…A novel descriptive method to analyze the process damping ζ P of ( 7) could be based on the sensitivity to time-delay of reference tracking transfer function F* com (s) [24][25][26][27][28]. The denominator D F (s) of this transfer function has further terms in addition to G mot (s), with the closed-loop poles characterized as in (30): If some mechanical parts are changed (e.g., higher CC size = J load , bigger motor = J mot , lifetime of the shaft = K el , C el ), they lead to different {k p ,k i } until the worst case is reached: a (ω 2 , ζ 2 ) close to (ω 1 , ζ 1 ).…”

Section: Process Damping and Characteristicsmentioning

confidence: 99%

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Adjustable Speed Control and Damping Analysis of Torsional Vibrations in VSD Compressor Systems

2021

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This paper proposes a model-based two-degree-of-freedom (2DOF) speed control for a medium voltage (MV) variable speed drive (VSD) connected to a centrifugal compressor (CC) train. Torsional mode excitations in the drive shaft due to converter switching behaviour are considered. An effective description of the harmonics transfer is proposed. The tuning strategy aims to optimize the tracking behaviour of the step and ramp command, taking care of critical speed excitations. The stability of the closed-loop dynamics against time delay and drive parameter variations are studied by means of Nyquist diagrams and time-domain simulations. A descriptive method for the process damping behaviour is proposed. The control strategy is evaluated through simulations as well as an experimental setup, based on a hardware in the loop (HIL) in a master–slave configuration.

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Section: Process Damping and Characteristicsmentioning

confidence: 99%

“…The applied torque m coupling leads to shaft failures if the maximum oscillations amplitude M m (t) exceeds the crack boundary [10]. From Table 1, it follows that this maximum value should respect (27):…”

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confidence: 99%

Adjustable Speed Control and Damping Analysis of Torsional Vibrations in VSD Compressor Systems

2021

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Torsional vibration in large variable speed drive systems: Origin and mitigation methods

Bruha¹,

Peroutka

2015

2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe)

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Torsional issues related to variable frequency control of elastic drive systems

Bruha

Byrtus

Pietiläinen

et al. 2016

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society

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Systems with variable frequency drives may experience torsional vibration. One reason is the pulsating nature of motor torque due to converter supply, another one is the electro-mechanical interaction and the effects of closed loop control. This paper deals with the speed control of elastic drive systems, mainly from torsional performance point of view. Modeling of elastic shaft string is being explored. The importance of control engineering to minimize the torsional vibration is explained. The paper also discusses different control strategies and their practical use in large resonant drive systems. Key factors in this part are complexity of the controller, its robustness and availability of required parameters. The practical aspects of the implementation in real control hardware are being considered. Attention is also paid to detection and monitoring of vibrations. Finally a verification method for correct parameterization on site is proposed. Different aspects are illustrated on simulations and calculations as well as on a real 6.1 MW compressor drive

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A study for on-line transfer function analysis, in realizing higher speed response adjustment, in association with variable speed rolling mill motor drive system

Cited by 3 publications

References 0 publications

Adjustable Speed Control and Damping Analysis of Torsional Vibrations in VSD Compressor Systems

Adjustable Speed Control and Damping Analysis of Torsional Vibrations in VSD Compressor Systems

Torsional vibration in large variable speed drive systems: Origin and mitigation methods

Torsional issues related to variable frequency control of elastic drive systems

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