Mitigation of Torsional Vibrations in a Modular Drivetrain with Interleaving Control

In order to meet requirements in machine design, modularity is often brought forward as a way to cope with load variations and adaptability of the architecture. The considered modular drivetrain consists of several identical induction motors, called motor modules, in cascade on the same shaft. Howev...

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Bibliographic Details
Published in:Machines (Basel) 2022-06, Vol.10 (6), p.429
Main Authors: van Os, David, Verkroost, Lynn, Sergeant, Peter, Vansompel, Hendrik, Stockman, Kurt
Format: Article
Language:English
Subjects:
Actuators
Analysis
Control methods
Electric vehicles
Flexibility
Induction electric motors
Induction motors
interleaving control
Load fluctuation
Modular design
modular drivetrain
Modularity
Modules
Powertrain
Pulse duration modulation
Synchronism
torsional vibration
Vibration
Waveforms
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Summary:In order to meet requirements in machine design, modularity is often brought forward as a way to cope with load variations and adaptability of the architecture. The considered modular drivetrain consists of several identical induction motors, called motor modules, in cascade on the same shaft. However, implementing a modular drivetrain design evidently has an impact on the performance of the application. New opportunities may arise, such as improved motion dynamics and tolerance to failures. However, on other aspects, e.g., torsional vibrations and synchronization, performance can be negatively influenced. By adding multiple actuators in the drivetrain, additional sources of torque ripple are introduced. The aim of this article is first to investigate the impact of using a modular design on the torsional vibrations in the drivetrain, and second to mitigate these vibrations via an interleaving strategy of the PWM (pulse-width modulation) signals. Simulations and experimental data show that the modular setup requires a proper control strategy in order to ensure that the torsional vibrations in the system remain within the range of a traditional non-modular design. Interleaving of the PWM carrier waveforms in the different motor modules is proposed as a control method to mitigate the torsional vibrations identified in the modular drivetrain. This strategy results in a drivetrain setup that slightly outperforms the benchmark in terms of torsional vibrations.
ISSN:2075-1702
2075-1702
DOI:10.3390/machines10060429