>"A typical SMES system includes three parts: superconducting coil, power conditioning system and cryogenically cooled refrigerator. Once the superconducting co

>"A typical SMES system includes three parts: superconducting coil, power conditioning system and cryogenically cooled refrigerator. Once the superconducting coil is charged, the current will not decay and the magnetic energy can be stored indefinitely." I wonder if this effect is in any way related to that of Ed Leedskalnin's PMH: https://www.youtube.com/results?search_query=leedskalnin+(PMH+or+%22Perpetual+Motion+Holder%22) https://www.youtube.com/results?search_query=leedskalnin+(PM... (Since the effect common to both is maintaining a current persistently (persisting a current once charged) -- until discharged...) Probably not, however... Perhaps the general terminology around this phenomena in the future will be "Magnetic Capacitor" and/or "Magnetic Capacitance"... Also, it's a well-known effect in electronics that coils AKA inductors (temporarily, not indefinitely, at least not without being recharged somehow) store electrical energy in a magnetic field... though there doesn't seem to yet exist a discrete commercially available coil/inductor electronic part -- that can store the same amount of energy that a supercapacitor can... Perhaps in the future that might change...