The Need
Modern electric machines face significant limitations in scaling power density, especially at higher supply frequencies. Conventional designs suffer from parasitic losses due to skin and proximity effects, which worsen as machine size and current increase. Existing solutions, such as Litz wire, are impractical for high-current, megawatt-class applications. There is a pressing need for electric machines that can deliver higher efficiency and power density without prohibitive complexity or cost.

The Technology
This technology, developed by an OSU engineer, introduces a fully integrated electric machine featuring “tuned coils” with optimized conductor geometry for each turn, dramatically reducing skin and proximity effects. The stator and rotor designs are paired with advanced, multi-stage cooling systems and integrated power electronics, all housed within a compact, modular structure. The result is a scalable, high-frequency electric machine capable of megawatt-class performance, with automated fabrication and assembly processes.

Commercial Applications
• High-performance electric vehicle drivetrains
• Industrial motor systems for heavy machinery
• Aerospace propulsion and auxiliary power units
• Renewable energy generation (e.g., wind turbine generators)

Benefits/Advantages
• Achieves power densities exceeding 100 kW/kg
• Substantially reduces parasitic losses, enabling efficient high-frequency operation
• Integrated cooling and electronics minimize footprint and simplify system integration
• Automated manufacturing and modular design lower production costs and enhance scalability