On Investigating the Effect of DC Biased Ripple Voltages over the Insulation of Bus Capacitor of Power Inverters: Possibility and Limitations

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Autoren

Externe Organisationen

  • K.N. Toosi University of Technology
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU Erlangen-Nürnberg)
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Details

OriginalspracheEnglisch
Seiten (von - bis)997-1002
Seitenumfang6
FachzeitschriftIEEE Transactions on Dielectrics and Electrical Insulation
Jahrgang31
Ausgabenummer2
Frühes Online-Datum5 Jan. 2024
PublikationsstatusVeröffentlicht - Apr. 2024

Abstract

With growing advances in semiconductor technologies and the introduction of new topologies in power networks, the implementation of power converters has dramatically increased. Such variations may impose additional electrical stresses and lead to failures in insulation systems. In this regard, understanding the behavior of insulation is of paramount importance. Conventionally, spectroscopy of insulations is performed under sinusoidal voltage waveforms, while there are certain conditions where the insulation is subjected to a non-sinusoidal voltage waveform with a possible DC bias. A good example of this situation could be the bus capacitor of power converters, where the capacitor on the DC voltage side provides a low-impedance loop for current ripple originating from the converter topology or load behavior. In this paper, the complex permittivity of the insulation was extracted under DC-biased sinusoidal and non-sinusoidal voltage waveforms. The challenges associated with such measurements have been addressed, and finally, the results over a typical sample are presented and discussed.

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On Investigating the Effect of DC Biased Ripple Voltages over the Insulation of Bus Capacitor of Power Inverters: Possibility and Limitations. / Sargazi, Reza; Werle, Peter; Akbari, Asghar et al.
in: IEEE Transactions on Dielectrics and Electrical Insulation, Jahrgang 31, Nr. 2, 04.2024, S. 997-1002.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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AU - Akbari, Asghar

AU - Apelsmeier, Andreas

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KW - Current measurement

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KW - Dielectrics

KW - Impedance

KW - Insulation

KW - Permittivity measurement

KW - ripple voltage

KW - variable speed drives

KW - Voltage measurement

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