Permanent Magnet Motors & Koenigsegg’s ‘Dark Matter’ Electric Motor

[Astronuc]

The thread was inspired by an article, "Here’s How Koenigsegg’s ‘Dark Matter’ Electric Motor Makes 800 HP"
https://www.thedrive.com/news/heres-how-koenigseggs-dark-matter-electric-motor-makes-800-hp
What is "raxial flux?" It's not a new genre of EDM.

Boutique Swedish automaker Koenigsegg recently unveiled the production version of its Gemera hypercar. It’s a hybrid, powered by two available combustion engines as well as a single, powerful electric motor known as the “Dark Matter.” How is it so small and so powerful? We don’t have extensive details of the device, but we can tell a lot by what Christian Von Koenigsegg, the company’s founder, has had to say about it.

The motor, which appears to be encased in forged carbon fiber, weighs under 40 kilograms. Koenigsegg claims it produces 800 horsepower and 922 lb-ft of torque. That’s about 600 kilowatts, a figure which will be more useful for our purposes. Since we know the Gemera operates at 800 volts, it’s going to take 750 amps of current to generate that peak kW figure. That’s a lot of current.

https://www.motortrend.com/features/koenigsegg-gemera-dark-matter-motor-v8-hybrid-supercar/
https://www.koenigsegg.com/dark-matter

But it's not without problems - Koenigsegg Tells All 28 Jesko Owners to Stop Driving . . . after one of their Jesko supercars burst into flames.
https://www.thedrive.com/news/koeni...rs-to-stop-driving-presumably-over-group-text

A Koenigsegg Jesko Attack “Nür Edition”—a somehow even more extreme version of what was already one of the world’s wildest performance cars—cooked down to a heap of hot trash on the side of a Greek highway on Saturday. Nobody was reported injured, but a great piece of art and engineering has been lost. The cause of the fire is under investigation, and in the meantime, the Swedish supercar company recommends all Jesko owners stop driving the cars in the interim. Thankfully, since less than 30 have been shipped, it’s not a problem too many people will have. And something tells me most of them have alternative transportation options.

https://en.wikipedia.org/wiki/Permanent_magnet_motor

This type of motor is used in GM's Chevrolet Bolt and Volt, and the rear wheel drive of Tesla's Model 3.

In the Wikipedia article, Emerging Permanent Magnetic Motor Materials

Development of non-rare earth, low cost, mechanically robust, and high strength permanent magnetic materials is a vigorous and ongoing area of research. Some notable materials systems of current interest include iron-cobalt-molybdenum ternary alloys, nanostructured cobalt-platinum alloys, and meteoric-type ordered iron-nickel alloys (Tetrataenite).

ABB leaflet on PM motors - https://library.e.abb.com/public/f6...6181_REVA_EN_HIRES_without cutting marks .pdf

https://www.sciencedirect.com/topics/engineering/permanent-magnet-motor