Harmonic Torque and Speed Pulsations in a Rectifier-Inverter Induction Motor Drive

Lipo, T.Α.; Krause, Paul C.; Jordan, Howard E.

doi:10.1109/tpas.1969.292326

Cited by 63 publications

(10 citation statements)

References 8 publications

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“…The simulation is based on the motor control model in CRH2A EMUs, the 5th current harmonic of different dead-time are shown in Fig.2. Percentage of 5th harmonic on fundamental current The 5th and 7th current harmonics will result low-frequency harmonic torque and the pulsation frequency is six times the stator fundamental frequency [6]. …”

Section: The Low-frequency Harmonic Torque Of Traction Motormentioning

confidence: 99%

Electromechanical Coupled Vibration between Traction Motor and Bogie of High-Speed Train

Zhang¹,

Zhao²,

Li³

et al. 2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

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Abstract. In high-speed train, the harmonics generated in invertor due to control and nonlinear of switch may lead to the torque ripple in different frequency and amplitude. The driving device which consists of rotor, coupling, gear, shift and wheels of bogie has some resonance frequencies. When there are frequencies which are same or close to the resonance frequency of shifts in the torque pulsation, the shifts would be vibrated. First the paper analyzes the cause and influence of the torque pulsation. Then the author calculates the vibration frequencies of drive devices. Finally the author simulates the coupling system of driving motor and bogie driving device.

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Section: The Low-frequency Harmonic Torque Of Traction Motormentioning

confidence: 99%

Electromechanical Coupled Vibration between Traction Motor and Bogie of High-Speed Train

Zhang¹,

Zhao²,

Li³

et al. 2016

Proceedings of The6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016)

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“…This is an approximate expression since it only includes the effects of the second harmonic of the line frequency in the dc bus voltage, as shown in (7).…”

Section: Appendix Closed-form Derivationmentioning

confidence: 99%

“…This type of pulsating torque [6] is principally produced by interactions between the fundamental electromagnetic flux and the fifth and seventh harmonic currents. A method of predicting the sixth-harmonic electromagnetic torque of an induction motor caused by excitation with six-step voltage waveforms was presented in [7]. The resulting pulsating torque can have undesirable effects [8] including vibration and audible noise [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Closed-form analysis of adjustable-speed drive performance under input-voltage unbalance and sag conditions

Lee

Jahns

Berkopec

et al. 2006

IEEE Trans. on Ind. Applicat.

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Abstract-Voltage unbalance or sag conditions generated by the line excitation can cause the input rectifier stage of an adjustable-speed drive (ASD) to enter single-phase rectifier operation. This degradation of the input power quality can have a significant negative impact on the induction-machine performance characteristics. This paper provides an approximate closed-form analysis of the impact of line-voltage sags and unbalance on the induction-machine phase voltages, currents, and torque pulsations for a general-purpose ASD consisting of a three-phase diode bridge rectifier, a dc link, and a pulsewidth modulation (PWM) inverter delivering constant volts-per-hertz excitation. Attention is focused on the impact of the dominant second harmonic of the line frequency, which appears in the dc link voltage during the sag/unbalance conditions, neglecting the impact of the other higher order harmonics. In addition to the closed-form analytical results that assume constant rotor speed, both simulation and experimental results are presented, which confirm the key analytical results, including the dominance of the second harmonic in the resulting torque pulsations. The analytical results can be used as a valuable design tool to rapidly evaluate the approximate impact of unbalance/sag conditions on ASD machine performance.Index Terms-Adjustable-speed drives (ASDs), input-voltage sag and unbalance, power quality, torque pulsation.

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“…One main problem arises with the prediction of mechanical torque fluctuations at the rotating shaft due to inappropriate power converter strategies (Lipo, Krause, Jordan, 1969;Stuart, Hebbar, 1971). Moreover, a deeper knowledge about the prediction of additional losses in converter driven motors is still unsolved (Heimbrock, Seinsch, 2005;Murphy, Egan, 1983).…”

Section: Introductionmentioning

confidence: 99%

Progress report about coupled finite element calculations for squirrel cage induction motors including various control strategies of power converters

Grabner

2006

Elektrotech. Inftech.

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The continually rising technical requirements of modern industrial drive applications often demand an improved, efficient and almost reliable design process. In particular, a very accurate prediction of undesired current and torque harmonic magnitudes as well as the accuracy of the rotor shaft's true running during load within converter fed induction motors become nowadays of crucial interest. So, the complex nonlinear interaction of the converter and the squirrel cage induction motor have to be considered and analyzed with adequate numerical methods. The proposed complete system approach takes thereby implicit account of a very detailed converter circuit representation with discrete electronic devices and an extensive 3D squirrel cage induction motor modeling by the finite element method. Various control strategies of the power converter --mode or manifold pulse width modulation methods -have been established in the past and are successfully used until now. The generated respective arbitrary time-dependent output voltage waveforms of the power converter are almost directly processed within the non-linear finite element analysis of the motor in the time-domain. Such numerical analysis methods deliver novel and deep insight into an almost very sensitive and complex speed-variable drive system.Keywords: coupled finite element analysis; squirrel cage induction motor; power converter; control strategy Fortschrittsbericht zu Gekoppelten-Finite-Elemente-Berechnungen fü r Kurzschlusslä ufermotoren unter Einbeziehung von unterschiedlichen Steuerungstechniken bei Umrichtern.Die stets steigenden technischen Anforderungen an moderne Industrieantriebe fordern immer mehr einen verbesserten, effizienten und vor allem zuverlä ssigen Entwicklungsprozess. Von besonderem Interesse bei umrichtergespeisten Motoren sind dabei die mö glichst exakte Bestimmung von ungewü nschten Amplituden im Strom-und Drehmomentspektrum sowie die Genauigkeit des Rotorrundlaufs unter Last. Das komplexe nichtlineare Zusammenwirken von Umrichter und Kurzschlusslä ufermotor muss daher mittels geeigneter numerischer Methoden nachgebildet und analysiert werden. Die vorgeschlagene Systembetrachtung macht dabei implizit Gebrauch von einer sehr detailgerechten Umrichternachbildung mit diskreten Bauelementen sowie einer sehr ausfü hrlichen Darstellung des Kurzschlusslä ufermotors unter zu Hilfenahme der Finite-Elemente-Methode. Unterschiedliche Ansteuermethoden fü r den Umrichter --Steuerung oder vielfä ltige Pulsweitenmodulationsverfahren -wurden in der Vergangenheit etabliert und werden bis heute erfolgreich eingesetzt. Die jeweils erzeugten beliebig zeitabhä ngigen Verlä ufe der Ausgangsspannung des Umrichters werden dabei direkt in der nichtlinearen Finite-Elemente-Berechnung des Motors im Zeitbereich mitverarbeitet. Solche numerischen Analysemethoden liefern neuartige und sehr eingehende Einblicke in das meist sehr sensitive und komplexe Verhalten von drehzahlverä nderbaren Drehstromantrieben.

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Harmonic Torque and Speed Pulsations in a Rectifier-Inverter Induction Motor Drive

Cited by 63 publications

References 8 publications

Electromechanical Coupled Vibration between Traction Motor and Bogie of High-Speed Train

Electromechanical Coupled Vibration between Traction Motor and Bogie of High-Speed Train

Closed-form analysis of adjustable-speed drive performance under input-voltage unbalance and sag conditions

Progress report about coupled finite element calculations for squirrel cage induction motors including various control strategies of power converters

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