Electro Permanent Magnet are lifting magnets made of two different types of permanent magnet blocks which either combine their respective magnetic flows (forces) into the load during the operating mode (lifting phase) or short-circuit them into each other during the resting mode. The passage from the resting mode to the operating one and vice versa is achieved by applying a short current impulse to one of the two permanent magnets which changes its polar orientation (direction of its magnetic flow). Therefore there is no use nor need to feed the magnet with electrical current during the operating mode.
SGM Magnetics has been designing and supplying EPRs for industrial applications since 1974 and is not only the pioneer but also the world market leader in this technology.