It is easy to establish how much energy is in a magnetic field. Just see how much energy would need to be used up to establish such a magnetic field with a superconductor coil.
Even a superconductor coil requires a voltage to establish a current due to the impedance involved. As such there is a very real amount of energy invested in and recovered from a magnetic field as it collapses inducing a voltage in a coil. I doubt there is enough to turn a motor with a load for very long, but of course that depends on the load and how many magnets and how strongly they are magnetized. There should be a calculator for establishing the energy in a magnetic field floating around the internet somewhere. John On Tue, Mar 15, 2016 at 11:15 AM, H Ucar <jjam...@gmail.com> wrote: > a.ashfield wrote: > > "With known science the only way it could work is by using up the > potential energy of the permanent magnets" > > I think the energy related to permanent magnets are overstated. A NdFeB > magnet can be demagnetized easily by heating without a spectacular energy > outcome. From entropic view this process could be even endothermic, the > energy stored in magnet could be negative. > > We may ask such a question in physics stackexchange. > > I expect a detailed report from TU/e soon which contain power and energy > figures. > > >
