[hamdani yusuf (OP)]

NO ELECTRICITY Electromagnet?!? The Weird and Wonderful Permanent Electromagnet

Have you heard of a permanent electromagnet? Magnets are usually permanent or electro, but the magnet featured in this video is both?
How does it work and how do you make it work? What's the point of it?
So many questions for this hybrid magnet technology. Let's find out!

Perhaps we can say this is a coupling between permanent magnet and electromagnet.
I wonder how much current is needed to overcome the hysteresis and make it unmagnetized permanently.