Magnetic "Perpetual" motion machine

Is possible to create a MAGNETIC perpetual motion machine? How do you think it can be done?

No it is by definition impossible

why ?

Why what?

Because you expend more energy alternating the electromagnets than you generate from the rotor

that doesn't explain why its impossible.

How is it not? You need more energy in than you can get out. Done, no perpetual motion

its not perpetual as in free energy out of nowhere. its as in a machine that makes use of a contraption with magnets that run with no other energy input.

By definition it is impossible because by definition perpetual motion machines are impossible, mainly due to friction. At any and every stage of any and every machine, an amount of energy, possibly small, possibly large, will be lost and converted to unusable waste heat.

Then no entropy exists and will ruin your shit.