Paper Info
Title
Pulsating Torques In Pwm Multi-Megawatt Drives For Torsional Analysis Of Large Shafts
Abstract
This paper presents new, simple, and linear mathematical relationships to predict pulsating torque frequencies in industrial multi-megawatt pulse width-modulated (PWM) drives. The proposed relationships provide direct definition of possible drive operating points where the torsional resonance modes of the mechanical shaft assembly might be excited. The calculation accuracy of natural frequencies and the induction motor slip have been taken into account in the definition of a critical excitation band. Variable switching frequency PWM strategies have also been analyzed. Pulsating torque frequencies of complex load-commutated-inverter configurations have been proposed as complementary results. Several tests have been performed on an integrated-motor-compressor system operating at high-speed (3.3 kV, 6 MW at 10 000 r/min). Intensive simulation results of a higher power PWM drive for compressor applications are shown to validate the suggested approach. This paper is a key tool for electrical engineers involved in the design of multi-megawatt drive systems such as in liquefied natural gas compression and transportation, mining, or cements.
Year
DOI
Venue
2008
10.1109/TIA.2009.2036515
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Keywords
Field
DocType
High power, liquefied natural gas, load-commutated inverter (LCI), mechanical resonance, multi-megawatt, pulsating torque, pulsewidth modulation (PWM), torsional vibration
Induction motor,Torque,Torsion (mechanics),Control theory,Pulse-width modulation,Harmonic analysis,Gas compressor,Torsional vibration,Engineering,Vibration
Conference
Volume
Issue
ISSN
46
1
0093-9994
Citations 
PageRank 
References 
1
0.39
2
Authors
3
Name
Order
Citations
PageRank
Joseph Song-Manguelle131.59
Jean-Maurice Nyobe-Yome210.39
Gabriel Ekemb321.07