EMI filter arrangement

DE102024000321A1Pending Publication Date: 2025-08-07MERCEDES BENZ GROUP AG
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Patent Information

Application Number
DE102024000321
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-02-01
Publication Date
2025-08-07

AI Technical Summary

Technical Problem

Existing EMI filters in electrically driven vehicles face challenges such as high-voltage safety limitations on Y capacitance, increased space requirements for larger CM chokes, and the need for frequent adaptations due to changing interference emissions during vehicle development and model maintenance.

Method used

Incorporating an adjustable CM-mode filter with variable capacitance diodes, such as varactor diodes, to dynamically adjust filter properties based on vehicle driving profiles, reducing Y capacitances during charging, and eliminating the need for contactor disconnection.

Benefits of technology

Enables intelligent filter adaptation without additional development loops, reduces the need for physical space, and maintains compliance with EMC requirements by dynamically adjusting to changing interference emissions.

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Abstract

The invention relates to an EMI filter arrangement (6), in particular for an electrically driven vehicle, comprising an EMI filter (1). According to the invention, the EMI filter (1) is coupled to at least one adjustable CM mode filter (7).
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Citation Information

Patent Citations

  • Filtering device for electromagnetic interference

    CN108566081A

  • Traction network

    DE102017220982A1

  • Filter device for an electrical power converter, electrical power converter and method for controlling a filter device for an electrical power converter

    DE102018204230A1

  • Common mode filter with y-capacitors and separating switch for decoupling same from the reference potential

    WO2022184293A1

  • CN000108566081A