Electric Drive is Now!

The large number of automobiles in use around the world has caused and continues to cause serious problems of environment and human life.

Air pollution, global warming, and the rapid depletion of the earth’s petroleum resources are now serious problems.

Electric Vehicles (EVs), Hybrid Electric Vehicles (HEVs) and Fuel Cell Electric Vehicles (FCEVs) have been typically proposed to replace conventional vehicles in the near future.

Most electric and hybrid electric configurations use two energy storage devices, one with high energy storage capability, called the “main energy system” (MES), and the other with high power capability and reversibility, called the “rechargeable energy storage system” (RESS).

MES provides extended driving range, and RESS provides good acceleration and regenerative braking. Energy storage or supply devices vary their output voltage with load or state of charge and the high voltage of the DC-link create major challenges for vehicle designers when integrating energy storage / supply devices with a traction drive.

DC/DC converters can be used to interface the elements in the electric power train by boosting or chopping the voltage levels. Due to the automotive constraints, the power converter structure has to be reliable, lightweight, small volume, with high efficiency, low electromagnetic interference and low current/voltage ripple.

Engineering teams must consider DC/DC converters topologies such as

  • Conventional step-up dc-dc converter,
  • Interleaved 4-channels step-up dc-dc converter with independent inductors and
  • Full-Bridge step-up dc-dc converter

The engineers carry out simulations – of  30KW DC/DC converter —  which take into account the weight, volume, current and voltage ripples, Electromagnetic Interference (EMI) and the efficiency of each converter topology as input for the AUTOSAR (AUTomotive Open System Architecture) architecture integration.

These are key when providing the technical solutions, the plans for implementation and setup of teams that handle the work packages.

Technical focus

AUTOSAR, Functional Safety, Cybersecurity

Technical framework

Embedded C, Vector Tools, VectorCAST, DaVinci Tools, Lauterbach Trace32, CAN, SVN, Jira with Confluence

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