Increasing the DC-link voltage up to 800 V brings significant advantages in automotive applications. Faster charging times, lower weight and better efficiencies are some aspects associated with these systems. In this work, a holistic system optimization for an 800 V automotive powertrain with Si-IGBTs and SiC-MOSFETs is discussed. The consideration of the specific challenges for optimizing an inverter for fast switching as well as its consequences at system level are discussed. The choice of the optimal PWM frequency as well as the impact of fast switching on bearing currents are also demonstrated. The efficiency gap between the Si and SiC solutions is derived experimentally and is shown to be very significant in cycle relevant areas. It is demonstrated that only a thorough consideration of the system tradeoffs and physical properties can lead to an optimal solution regarding efficiency, costs and reliability at system level.
System Optimization for 800 V e-drive Systems in Automotive Applications
Proceedings
International Conference on Drives and energy systems of tomorrow ; 2022 ; Berlin, Deutschland May 10, 2022 - May 11, 2022
2023-08-29
13 pages
Article/Chapter (Book)
Electronic Resource
German
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