LAST digit, so it's a '2' Series
You won't find too much 'scientific' detail in a manufacturer's description of the technology. They focus on the benefits, which are faster warm-up, less energy, less materials to build and reliability.
All induction is based on Faraday's Laws of Electromagnetism: "Whenever a conductor is placed in a varying magnetic field, an electromotive force is induced."
So let me break that down:
1) The conductor is the fuser heat roller, which is made of special nickel/iron composite which has a 'moderate resistance' to electrical flow.
2) The varying magnetic field comes from the IH (Inductive Heat) coil, which is located outside the fuser roller
3) This magnetic field is rapidly reversed, which excites the electrons in the fuser roller in a 'push-pull' fashion (electromotive force)
4) The electron motion in the nickel/iron belt meets the resistance to this motion causing friction, and thus heat.
It's basically like rubbing your hands together, only at a molecular level. This heat is instantaneous and is generated inside the belt.
Traditional 'hot bulb' fusers must radiate their heat from the source (bulb) to the fuser roller. This takes more time and uses more power than necessary. Also these fuser rollers are heavier and retain more residual heat as wasted energy.
Physics was always my favorite class. I'll never forget seeing a magnet float in the air over a superconductor bathed in liquid nitrogen. There, the super conductor has no resistance to electron flow, and creates an opposing magnetic field which suspends the magnet. Freaking wild.
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