Electric propulsion systems are considered a key technology for the next generation of drones, eVTOL aircraft, and other aviation systems. As demands for range, power density, efficiency, and operational safety continue to increase, the electromagnetic core components of electric motors are receiving more attention.
The full, journalistically authored feature article has already been published in German in several renowned industry and trade media outlets:
When every gram counts
In aviation, unlike in many industrial applications, weight and energy consumption directly impact range, flight duration, and cost-effectiveness. At the same time, electric propulsion systems must reliably operate under demanding conditions and meet the highest performance standards.
High-performance electric motors form the basis for this. However, their efficiency is not determined solely by the motor design, but is significantly influenced by the quality of the stator and rotor laminated core assemblies used. These components affect the electromagnetic properties, thermal behavior, and mechanical stability—and thus the overall performance of the drive system.
Efficiency begins with the components
In electrical aviation systems, as much of the available energy as possible must be converted into usable power. Any energy loss reduces the available range and increases the need for cooling.
The precision-machined and intelligently assembled stator and rotor lamination stacks play a key role in this. Thanks to optimized geometries, minimal air gaps, and high-quality materials, it is possible to reduce electromagnetic losses while increasing power density.
Additionally, they impact the motor’s thermal stability. Lower power dissipation results in less heat generation, creating conditions that allow for higher power densities while maintaining a compact design.
Facts
- Energy efficiency vs. system weight → direct impact on range and flight duration
- Minor efficiency losses → disproportionate impact on flight performance, cooling, and fuel efficiency
- Mass production requires maximum process stability → even minimal deviations can have a critical impact on operational reliability
Materials and Manufacturing Processes as Key Success Factors
Modern drone and aviation systems have much higher demands than traditional electric motor applications. High rotational speeds, varying load conditions, and strict weight requirements necessitate precise coordination of material selection, design, and manufacturing.
High-performance drive systems are founded on thin electrical steel sheets, innovative alloys, and modern packaging technologies. It is also essential that these components can be manufactured reproducibly and cost-effectively to facilitate the transition from development to industrial mass production.
Modern manufacturing concepts enable high precision and stable processes, as well as consistent quality across large production runs. This is a critical factor for scaling future aerospace applications.
Combining performance and operational reliability
Electrical aviation systems place the highest demands on reliability and safety. In addition to sheer performance, all components must function reliably over the long term and withstand the stresses of flight operations.
This underscores the importance of a holistic approach to development and production. High-performance drive systems that are also cost-effective to produce can only be developed through the optimal interplay of design, materials, manufacturing processes, and quality assurance.
Key Technologies for the Next Generation of Aviation – Conclusion
The electrification of aviation will continue to gain importance in the coming years. As a result, the demands on the efficiency, weight, power density, and scalability of electric propulsion systems will increase.
Precision-manufactured stator and rotor laminated core assemblies are a key technological foundation. These assemblies play a crucial role in optimizing electric drive systems and paving the way for innovative concepts, such as drones, eVTOL systems, and other electric aircraft, to transition from development to industrial application.
From development to production
The industrialization of electric aircraft drives places the highest demands on precision, process stability and quality assurance.
SWD therefore supports its customers along the entire value chain – from the design of electromagnetic core components through to cost-effective series production.