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A capacitor-clamped inverter based torsional oscillation damping method for electromechanical drivetrains


Shagar, V and Bandara, D and Jayasinghe, S and Enshaei, H, A capacitor-clamped inverter based torsional oscillation damping method for electromechanical drivetrains, MATEC Web of Conferences, 13-14 January 2016, Singapore, pp. 1-5. ISSN 2261-236X (2016) [Refereed Conference Paper]


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Copyright 2016 The authors Creative Commons Attribution Licence 4.0

DOI: doi:10.1051/matecconf/20164503001


A typical electromechanical drivetrain consists of an electric motor, connecting shafts and gears. Premature failures of these shafts and gears have been reported which are mainly due to fatigue caused by extreme loads and torsional oscillations. Overdesign and passive damping are the common approaches taken to increase the fatigue life. Nevertheless, they increase the system cost, weight and volume. Alternatively, active damping through advanced inverter control of the motor drive has been identified as a promising solution that does not require overdesign or alterations to the existing system. Even with the active damping control, oscillations propagate into the dc side of the power converter and subsequently to the upstream power bus. Generally, a large capacitor or an additional energy storage system is placed to suppress these oscillations. This paper proposes to use the clamping capacitors of the capacitor-clamped inverter as energy storage elements and thereby eliminate the need for a large dc side capacitor or an additional energy storage system. The efficacy of the proposed method has been verified with computer simulations. Simulation results show that the clamping capacitors are capable of containing torsional oscillations within the inverter without passing them to the upstream power bus.

Item Details

Item Type:Refereed Conference Paper
Keywords:azimath thrusters, capacitor-clamped inverter, stress reduction in mechanical drivetrain, torsional oscillation damping
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Dynamics, vibration and vibration control
Objective Division:Transport
Objective Group:Water transport
Objective Field:International sea freight transport (excl. live animals, food products and liquefied gas)
UTAS Author:Shagar, V (Mr Viknash Shagar)
UTAS Author:Bandara, D (Mrs Doupadi Herath Mudiyanselage)
UTAS Author:Jayasinghe, S (Dr Shantha Jayasinghe Arachchillage)
UTAS Author:Enshaei, H (Dr Hossein Enshaei)
ID Code:107863
Year Published:2016
Deposited By:Seafaring and Maritime Operations
Deposited On:2016-03-30
Last Modified:2018-04-05
Downloads:172 View Download Statistics

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