Inside YEESMA
Our Breakthrough Motor Technology
YEESMA is a patented rare-earth free electric machine technology which offers key benefits in comparison to the state-of-the-art available e-machine technologies in the market.
How can electric motors deliver higher torque
without increasing stator size or relying on rare-earth materials?
This question lies at the heart of next-generation motor development
—especially as industries demand more compact, efficient, and sustainable e-mobility solutions.
YEESMA Axial Flux EESM Solutions
Yokeless/Yoke Electrically Excited Synchronous Machine
At the core of YEESMA is a patented yokeless axial flux design, featuring rotor and stator made from either Laminated Steel or Soft Magnetic Composites (SMC). This innovative structure creates multiple airgaps, enabling:
- Higher rotor ampere-turns
- Significantly reduced armature reaction
- Greater torque output within a compact volum
A more stable, cost-effective, and sustainable path starts here
Unlike permanent magnet machines, YEESMA’s use of copper DC field windings enables
precise control of excitation and places the windings in direct contact with the cooling medium
—ideal for oil cooling and continuous high-power operation.
01
Higher Torque Density → Lower Material Cost
Compact yet powerful, this allows designers to use less copper and core material overall.
02
Easier Rotor Cooling → Higher Peak Ratio
Efficient thermal paths through rotors maintain performance under sustained load.
03
EESM Topology → Easier Production
No permanent magnets means no complex insertion or delicate alignment—simplifying the production line.
-45% Bill of Material
High Potential, Cost-Effective
No need for rare-earth magnet—cutting costs without cutting performance.
-25% Volume
Made for Mass Production.
Simplified structure = faster, easier assembly. Perfect for scaling production affordably.
-50% CO2 Emissions
Greener by Design
Less use of copper and no rare-earth magnet— lower CO₂ emissions and a stronger alignment with sustainability goals.
+3% Efficiency
Enable longer vehicle
Higher average efficiency in duty cycle allows longer vehicle range without the need to increase battery size.
Technology Comparison at a Glance
The absence of rare-earth materials simplifies rotor construction, eases assembly, and avoids the price volatility associated with global magnet supply chains. YEESMA offers a breakthrough in sustainable, high-performance motor solutions.
