I’m trying to wrap my head around electropermanent magnetism. I read this wonderful PhD Thesis by Ara Knaian as well as details the history of this concept as well as Kyle Gilpin, Ara Knaian, and Daniela Rus’ implementation with the Robot Pebbles project (also quite fascinating ).
As I naively understand, by using a neodymium magnet along side a Alnico magnet (which I believe is solely wrapped with a determined turn count of magnet wire) and sandwiched between two iron “keepers”, a positive voltage and current can be inducted through the magnet wire causing the Alnicos magnetic “polarity” to flip/change. This change can turn on or off the magnetic holding power.
First off, is my understanding of this remotely correct?
The author includes a schematic outlining the H-bridge method which I think is necessary as method for providing different power polarities?
I’d like to try to build one of these electro perm ant magnets, yet getting caught up on the h-bridge concept as well as the general current “building” concept pulsing voltage into a capacitor (which I think builds up current).
All of this I can imagine is quite elementary for you all. Thank you you any help or guidance.