There are two well known basic concepts for achieving magnetic levitation of vehicles: one is based on electromagnetic attraction (EMA); and the second method is based on electrodynamic repulsion (EDR). This paper presents a description of a lesser known third form of magnetic levitation which in the former USSR is called the dc circuit Magnetic Potential Well (MPW) effect, developed by Kozoriz. (1)1 This magnetic levitation effect is based on the fact that the energy of magnetic interaction between two magnets shows a null minimum, as a function of the separating interval between the magnets, before the distance approaches zero. The existence of this magnetic energy null minimum contradicts the classic Earnshaw principle and the Braunbeck theory by which the existence of such a magnetic energy minimum depends on the presence of a diamagnetic material. However, it should be emphasized that the MPW system in the following discussion does not contain diamagnetic material(2).
