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Software for E-Vehicles’ ASIL-C 3-Level Inverters

Powertrain, body and chassis
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Software for E-Vehicles’ ASIL-C 3-Level Inverters

About the client

Andersen was approached by a trusted partner of automotive manufacturers, a prominent Europe-based company working in the domain of sustainable mobility and e-vehicles and cooperating with world-known car brands. They outsourced the work on low-level software layers for a 3-level inverter to our dedicated team. Andersen's specialists seamlessly integrated with their in-house engineering processes and submitted all the required deliverables in full conformity with strict safety and quality standards.

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About the project

Andersen assigned development specialists possessing relevant skills to an automotive company to engineer software for ASIL-C 3-level inverters in e-cars.

Duration18 months
EB tresos Studio


Vector CANape, TRACE32, SPI Analyzer tools (Saleae), CAN FD, LIN, SPI, Git, Jenkins, Polarion

Software layers
Software layers

Business Context

The e-vehicle niche is on the rise all over the globe. According to the International Energy Agency, the percentage of e-car sales rose from 4% in 2020 to 15% in 2022. Correspondingly, market competition is getting stiffer. Manufacturers seek to offer the best possible user experiences while meeting all industry and safety-related standards. In order to meet them, our customer in this business case participated in the implementation of a project focused on inverters – devices that convert DC power into AC power.


While working on this automotive IT project, we had the following three main tasks:

  • Assuming a pivotal role in providing the necessary expertise and workforce for orchestrating the software engineering and integration of an ASIL-C 3-level inverter for e-vehicles;
  • Becoming an integral part of the customer’s software process in this capacity;
  • Meeting the high standards of ASPICE and ISO 26262 (ASIL-C) in their entirety.


In this software development project for the prototype of an ASIL-C 800V 3-level inverter for e-vehicles, the scope of work assigned to us covered:

  • Integration and configuration of a Microcontroller Abstraction Layer;
  • Development and testing of drivers for a system basis chip.

In particular, we dealt with the implementation, documentation, and testing of the following complex device drivers:

  • Eice drivers;
  • IGBT drivers;
  • TMR position sensor drivers.

Also, the deliverables that our team was expected to submit in terms of implementing, documenting, and testing of the I/O Hardware Abstraction components for safety critical digital and analog acquisition should be mentioned:

  • AC current signal acquisition;
  • Resolver speed and position signal acquisition (TMR driver);
  • HV DC link voltage signal acquisition;
  • Electrical motor, DCB and Coolant temperature signal acquisition.

Finally, we took care of the End-2-End CAN communication safety mechanisms – both their implementation and testing.

AUTOSAR compliance
AUTOSAR compliance

Project results

The project has been successfully implemented with the following results:

  • Software low-level layers for a 3-level inverter were built, tested, and documented on time and within budget;
  • All the deliverables are 100% compliant with the Automotive SPICE and ISO 26262 processes;
  • The resulting software is reusable and modular, enabling the customer to make use of it in different subsequent projects with minimal effort.

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