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Advisor(s)
Abstract(s)
This chapter focuses on the analysis and characterization of the vibrations produced by switched reluctance actuators. The emphasis stands on the linear configuration of this type of machine. The complexity of the mechanical system and the
materials is used to define the modal frequencies. Moreover, the power controller
topology, the excitation regimes, and the switching frequency used for the actuator
operation can excite the natural modes and put restrictions on its usage. The analysis
considers both numerical and experimental methodologies. The numerical technique
relies on the finite element method (FEM) using the 3D model of the actuator to find
its natural frequencies up to 1.3 kHz. The experimental characterization counts on
the operational modal responses and the acoustic noise emitted. We identify the
regions of interest to measure the local accelerations and collect data for postprocessing and record the audible noise emitted for signal analysis. The popular
discrete Fourier transform and the joint wavelet-Fourier analysis are used for signal
analysis. The reliability and the suitability of this approach are verified comparing
both the numerical and the experimental outcomes and support the identification of
the switching frequencies with high potential to excite the natural modes under the
regular operation of the machine and to choose the proper control strategy.
Description
Keywords
Linear switched reluctance drives Force ripple Vibrations Acoustic noise Numerical analysis Operational modal responses Hybrid spectrum
Citation
SALVADO, J.A.C.; CALADO, M.R.A; ESPIRÍTO-SANTO, A.E.V. (2020) - Numerical and experimental analysis of vibrations in a three-phase linear switched reluctance actuator. In ARAÚJO, R.E.; CAMACHO, J.R. eds - Modelling and Control of Switched Reluctance Machines. London; Rijeka: IntechOpen. ISBN 978-1-78984-455-9. 1-33 p.
Publisher
IntechOpen