Design of a Hybrid Common - Mode EMI Filter for Traction Inverters in Electrical Vehicles

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 5Sprache: EnglischTyp: PDF

Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt

Mueller, Denis; Beltle, Michael; Tenbohlen, Stefan (University of Stuttgart, Germany)
Spanos, Konstantin (Robert Bosch GmbH, Germany)

Higher power density due to silicon carbide switches, rising battery voltages up to 800 V and the mechanical benefits of unshielded battery cables require bigger EMI filters necessary for traction inverters in electrical vehicles. In order to counteract this trend, hybrid EMI filters, which are a combination of passive and active components, represent a promising opportunity to reduce the size of inductive filter elements. This paper presents a design approach and a first prototype of a hybrid filter for an automotive traction inverter. Different filter topologies are discussed in order to find the best match for the use case. Finally, the prototype’s attenuation is evaluated in a CISPR 25 standard test setup.