Externally Excited Synchronous Machine
Externally excited synchronous machines (EESM) are free of rare-earth elements and thus minimize cost and supply chain risks with an optimized CO2e footprint. Thanks to flexible excitation, EESM rotors can handle rapid changes in speed and torque, making them suitable for dynamic applications, e. g. in industrial systems or electric vehicles. The Schaeffler EESM portfolio covers a performance range from 15 kW up to 300 kW.
Highlights
- No dependence on rare earth elements
- High power density
- Adaptable rotor field
Advantages
- High efficiency at WLTC and highway driving
- Minimized cost and supply chain risk
- Increased sustainability by optimized CO₂e-footprint
- Enhanced operational safety
Features
- The rotor operates through electric excitation typically using slip rings or a contactless transmission for excitation
- Scalable performance due to variable excitation current and rotor winding number
- Fast safety concepts ensures minimal thermal stress on power electronics and motor