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

Bruha, Martin; Peroutka, Zdeněk

doi:10.1109/epe.2015.7309169

Cited by 13 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some mitigating approaches that may be applied to reduce the amplitudes of interharmonics were discussed by Bruha and Peroutka. 31 These mitigating approaches included changing the predetermined speeds at which the pulse mode is changed, installing an output sine filter and increasing the pulse number of the inverter. According to Ellis,26 the optimisation of the DC link design can also minimise the presence of interharmonics.…”

Section: Approaches To Mitigate Polygonal Wheel Wearmentioning

confidence: 99%

Solving locomotive wheel polygonisation by reducing variable frequency drive interharmonics

Spangenberg

Fröhling

2020

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

Severe vibrations and an increase in structural component fatigue failures have been observed on a freight locomotive class operating in South Africa. The cause of the severe vibration was linked to polygonal wheel wear dominated by the 20th order. This locomotive is powered by an alternating current traction system, which is controlled by a variable frequency drive. The variable frequency drive generates interharmonics that produce torque pulsations in the torque output from the motors. Interharmonics are determined by the alternating current supply frequency ([Formula: see text]) and the fundamental frequency ([Formula: see text]) of the variable frequency drive. The interference of the torque pulsations with a coupled resonance mode is reaffirmed as the root cause of the polygonal wheel wear. An experimental investigation of this phenomenon was performed by means of on-track testing. It was found that the [Formula: see text] interharmonic excited the coupled resonance mode at approximately 42 km/h, which fixes the 20th-order polygon on the wheel. Two approaches that may eliminate the polygonal wheel wear were introduced and discussed. It was found that the forced excitation of the coupled mode by the [Formula: see text] interharmonic could be avoided by postponing the speed where the alternating current traction motor's pulse mode changed.

show abstract

Section: Approaches To Mitigate Polygonal Wheel Wearmentioning

confidence: 99%

Solving locomotive wheel polygonisation by reducing variable frequency drive interharmonics

Spangenberg

Fröhling

2020

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

show abstract

“…Therefore, torque ripple of the VFD driven motor shall be kept within certain limits. More important than the overall peak-peak torque is however the frequency spectrum of the motor torque [12,13]. The frequency content of the motor torque defines if torsional modes of the shaft string will be excited or not.…”

Section: Vfd Load Friendlinessmentioning

confidence: 99%

High Speed Electrical Drives – Perspective of VFD Manufacturer

2020

Self Cite

View full text Add to dashboard Cite

This paper deals with high-speed electrical drives utilizing power electronic converters (commonly abbreviated as ASD, VFD or VSD). Existing solutions vary mainly on the motor side while the power electronic converter is very similar for all cases. Various advantages as well as technical challenges are discussed and illustrated. At certain stages comparisons between conventional and high-speed drives are made. The paper summarizes the experience of a VFD manufacturer based on state of the art technology in medium voltage and multi-megawatt power range. The authors believe that main complexity around high-speed drives is the motor design while the VFD requires only small adaptations or can sometimes be used directly without any modifications of standard design. The technology readiness is evaluated to be on a medium to high level.

show abstract

“…Excitation of torsional resonances by the torque ripple and the interaction between the electric and mechanical elements are the main source of such vibrations [32]. Torsional vibrations in mechanical systems fed from electrical drives can be either passively or actively damped [33]. Passive cancellation can be implemented using Infinite Impulse Response (IIR) notch filters.…”

Section: Introductionmentioning

confidence: 99%

Torsional Vibration Suppression in Railway Traction Drives

et al. 2022

View full text Add to dashboard Cite

Torsional vibrations phenomena are self-excited vibrations that occur in the wheelset of railway powertrains due to the counter-phase oscillation of both wheels. Long-lasting events of this type may lead to the catastrophic failures. Therefore, torsional vibration suppression and mitigation methods have drawn significant attention from the railway industry in the recent few years. Conventional vibration suppression methods reduce motor torque once the oscillation is detected. However, this can result in trip delays. Design of methods which do not compromise the traction capability is challenging. This paper proposes a novel torsional vibration suppression method using a Proportional-Resonant (PR) controller. The proposed method is insensitive to mechanical drive-train parameter variation neither requires adding new sensors to the wheelset. The method requires previous knowledge of the natural frequency of the wheelset torsional mode but this significantly reduces the implementation complexity suffered by other anti-vibration methods. Furthermore, the method will be shown to provide reduced sensitivity to slip velocities and wheelrail conditions.INDEX TERMS Railway traction drives, torsional vibrations, slip-stick phenomenon, slip control, fieldoriented control, proportional-resonant controller.

show abstract

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

Cited by 13 publications

References 15 publications

Solving locomotive wheel polygonisation by reducing variable frequency drive interharmonics

Solving locomotive wheel polygonisation by reducing variable frequency drive interharmonics

High Speed Electrical Drives – Perspective of VFD Manufacturer

Torsional Vibration Suppression in Railway Traction Drives

Contact Info

Product

Resources

About