Perpetual motion: Impossible.
You know, it'll be EXTREMELY difficult to make something better than a generator. The efficiency just isn't there.
You have to produce all possible electricity from the coil, and have minimal flow resistance to the motor, just to allow for it to power itself. Creating excess energy, to power other things, is an even more difficult task...
It will have to be kick-started by something, often, in order to keep the machine producing...
+1 perpetual motion machines aren't physically possible -> entropy.
If you want to believe what they teach in college, so that we don't look for what is there and reasonably obvious.
Consider the river that powers the turbine to make electricity. We might direct the river a little, but we certainly don't cause the water to exist. The whole thing runs constantly. And if you do regular maintenance on the dam, the water keeps on flowing, all by itself. It might flow like this forever. So the turbines might make electricity forever.
Is it perpetual motion in the "pure" sense? Probably not. But we simply don't know enough about all the secrets of the universe to be able to tell for sure. Someday we might.
Yet, for all intents and purposes, in a practical sense, it IS perpetual motion. The rains have been coming, the waters have been flowing, for thousands of years. If people knew how to make turbines and generators 5,000 years ago, they could have. That's at least 5,000 years of perpetual motion!