Operating Point, Load Line and Permeability Pc of Permanent Magnet The permanent magnet works in the open circuit state. Since the magnet in the open circuit state is under the action of the demagnetization field, the magnetic induction intensity of the permanent magnet in the working state is not at the Br point in the [...]
Anisotropy of Permanent Magnet Shape and Demagnetization Field and Demagnetization Factor Make the permanent magnet into a certain shape. Take the block magnet in the following figure as an example. If you measure the magnetization curve in the open circuit state along the x, y, and z directions of the magnet, you can find that [...]
Can unmagnetized steel be magnetized? Yes, all that is necessary is to line up the free electrons in all the atoms in a sample of steel or iron in the same direction. One way of magnetizing steel is to wrap the electric wire around the steel multiple times and then run a current through the [...]
THE RISE IN COMMERCIAL USAGE OF RARE EARTH MAGNETS Rare earth magnets are solid combination magnets which were produced in the late 70’s. The remanence of the magnet is a vital variable to look at when purchasing. Dissimilar to fire or ferrite magnets, rare earth has stronger quality, up to 1.4 teslas. Furthermore, consideration must [...]
Demagnetization is the reduction or elimination of magnetization. One way to do this is to heat the object above its Curie temperature, where thermal fluctuations have enough energy to overcome exchange interactions, the source of ferromagnetic order, and destroy that order. Another way is to pull it out of an electric coil with alternating current [...]
