Authors

S. Maxl, Höhere Technische Lehranstalt St. Pölten, D. Asch-Goiser, LeTTo GmbH, St. Pölten

Year

2026

Print Info

Production/Publication ÖVK

Summary

The global transition toward electromobility represents a significant technical challenge that requires a fundamental evolution in engineering education, shifting from isolated disciplines to a holistic understanding of complex system integration. This paper details the development of a student-led, high-performance traction inverter at HTL St. Pölten, specifically designed for the Zero Emission Challenge. A primary driver of this project’s success is the Letto STEM learning platform, which serves as the curriculum's digital backbone by utilizing randomized technical parameters to ensure individual mastery. This methodology triggers the scientifically documented Letto effect, a measurable surge in student performance and motivation substantiated through longitudinal studies. The platform facilitates a cognitive shift where students focus on the underlying logical process rather than mere results, supported by an immediate feedback loop that transforms errors into real-time learning opportunities. The technical core of the inverter utilizes industry-standard hardware, specifically the Infineon HybridPACK™ drive module featuring advanced silicon carbide MOSFET technology. By leveraging these high-performance semiconductors, the design effectively minimizes conduction losses and maximizes drivetrain efficiency. Students managed the entire engineering lifecycle, including the design of isolated gate-driver units, advanced digital signal processing control boards, and liquid-cooled thermal management systems. The software architecture implements field-oriented control with automated code generation, supporting both sensor-less models and field-weakening modes for high-speed racing scenarios. Comprehensive validation was conducted on a dedicated test bench featuring a traction motor, a DC source for safe firmware debugging, and a load motor to replicate real-world track conditions. By bridging the gap between theoretical simulation and industrial-grade output, this methodology fosters an engineering mindset, preparing graduates to lead the transition toward a zero-emission automotive future.

ISBN

978-3-9504969-5-6

DOI

https://doi.org/10.62626/tk3w-roab Copy link

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