An electrostrictive model for polypropylene capacitors including intermediate layer polarization

In power electronics for electrical drivetrains, DC-link film capacitors are exposed to high ripple voltages. These voltages lead to electromechanical forces inside the dielectric of the capacitor which may result in acoustical noise emission. Therefore, an analytical model for calculating the elect...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2020-08, Vol.27 (4), p.1348-1353
Main Authors: Bonart, J. A. E., Herrnberger, M., Hulsebrock, M., Lichtinger, R.
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustic noise
Atomic force microscopy
Capacitors
Computer simulation
Dielectric measurement
dielectric polarization
Electrostriction
Emission analysis
Mathematical model
Mathematical models
Polarization
Polypropylene
polypropylene films
Powertrain
Strain
thin film capacitor
Vibration meters
Vibrometers
Windings
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Description
Summary:In power electronics for electrical drivetrains, DC-link film capacitors are exposed to high ripple voltages. These voltages lead to electromechanical forces inside the dielectric of the capacitor which may result in acoustical noise emission. Therefore, an analytical model for calculating the electrostrictive deformation of polypropylene including intermediate layer polarization is presented. Numerical finite-element simulations are further accomplished and are validated with laser vibrometer and atomic force microscopy measurements.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2020.008878