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Automatic EMI filter design for three-phase PWM inverter used in automotive transmission

Automatisierte EMI-Filterauslegung von dreiphasigen PWM-Wechselrichtern für den Einsatz in Fahrzeuggetrieben

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Abstract

Over the last few years, the automotive industry has been moving toward pollutant-free and economically sustainable alternatives due to increased regulations concerning CO2 emissions. The hybrid and pure electric transmissions have been proposed to not violate these constraints.

The use of new electrical and electronic components has led to new challenges in terms of space optimisation. Various synthesis tools have been developed over the years for electric and hybrid transmissions to analyse these new solutions thoroughly and effectively.

At times, the components are calculated through databases and are standardised and not developed for the specific case which causes an oversize of the parts.

The size of the Electro-Magnetic Interference Suppression Filter (EMI filter) can contribute up to 30% of the inverter’s total size and weight. Therefore, designing a filter with high-power density and small volume is fundamental. The purpose of this paper is to create an algorithm capable of evaluating the physical and geometric characteristics of an EMI filter, varying the conditions of use. Furthermore, the algorithm can consider geometric constraints.

Zusammenfassung

Aufgrund der immer strenger werdenden gesetzlichen Rahmenbedingungen bezüglich CO2-Emissionen befindet sich die Automobilindustrie im Wandel. Um diese gesetzlichen Vorgaben zu erfüllen, werden die Fahrzeuge zunehmend elektrifiziert.

Der damit einhergehende Anteil elektrischer und elektronischer Komponenten im Antrieb führt zu neuen Herausforderungen im Bereich der geometrischen Integration. Um den sich hierbei ergebenden Lösungsraum effizient und vollständig bewerten zu können, wurden in den letzten Jahren verschiedene Algorithmen zur Auslegung dieser Komponenten entwickelt.

Diese Auslegungsroutinen bedienen sich standardisierter Datenbanken, um die Komponenten zu dimensionieren, was dazu führt, dass diese überdimensioniert sind.

Die Größe des Filters zur Unterdrückung elektromagnetischer Interferenz (EMI) kann bis zu 30% des Umrichtergewichts und –volumen ausmachen. Aus diesem Grund ist eine Leistungsdichte und kompakte Auslegung des Filters unabdingbar. In diesem Paper wird ein Algorithmus vorgeschlagen, der es ermöglicht, die physikalischen und geometrischen Eigenschaften eines EMI-Filters unter Berücksichtigung frei wählbarer Anforderungen zu bewerten. Zusätzlich können geometrische Randbedingungen berücksichtigt werden.

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Authors and Affiliations

  1. Industrial and Automotive Drivetrains, Ruhr-University of Bochum, Bochum, Germany

    Giovanni Filomeno, Bastian Krüger & Peter Tenberge

  2. Advanced Development Transmission and Powertrain Simulation, BMW-Group, Munich, Germany

    Giovanni Filomeno, Bastian Krüger & Dirk Dennin

Authors
  1. Giovanni Filomeno
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  2. Bastian Krüger
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  3. Peter Tenberge
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  4. Dirk Dennin
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Filomeno, G., Krüger, B., Tenberge, P. et al. Automatic EMI filter design for three-phase PWM inverter used in automotive transmission. Elektrotech. Inftech. 138, 110–116 (2021). https://doi.org/10.1007/s00502-021-00870-9

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