I’m fascinated by Koenigsegg and YASA.Both push motor density differently.
- Murali krishna
- 4 hours ago
- 1 min read
Koenigsegg’s Dark Matter caught my attention.
It delivers 600 kW peak power.
And 1,250 Nm peak torque.
All from just 39 kg.
That means roughly 15.4 kW/kg. 🚀
I also came across the YASA motor recently.
Its motor reportedly delivers 750 kW.
The motor weighs only 12.7 kg.
That means 59 kW/kg peak power density.
But the numbers aren't everything.
The architecture is equally interesting.
YASA uses an axial-flux design.
Dark Matter combines axial and radial flux.
Dark Matter's motor uses a six-phase winding.
Two three-phase systems work together.
They improve torque delivery and redundancy.
Carbon-fiber structures reduce mass further.
The compact package also saves space.
This matters far beyond hypercars.
Think humanoid joints and robotic actuators.
Every gram directly affects robot efficiency.
Higher torque density enables smaller actuators.
It can also reduce gearbox requirements.
For me, this is fascinating.
Motor design is moving toward integration.
Power density is becoming a key metric.
YASA: 59 kW/kg peak
Dark Matter: ~15.4 kW/kg peak
Here’s how I look at it.
YASA’s axial-flux design is
Highly mass-optimized.
Its large rotor radius enables
Higher torque density.
Dark Matter’s Raxial design balances
Power, cooling, stiffness, and packaging.
So topology matters, but mass, speed,
Cooling, and electromagnetic loading matter more.
But I have something interesting to discuss and debate.
Why can two advanced motor architectures
Have such different power densities?
Picture source: Hackernoon.
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