Magnechuck also with traffic, cranes and other lifting equipment for use, both single use, but more than one combination of large steel suction operation, to overcome the disadvantages of permanent lifting and lifting magnets, and build two those advantages - to do the work with permanent magnetic suction, with power to control the charge, demagnetization. Permanent lifting the internal use of high-performance permanent magnet materials, and installation of an excitation coil. When fed instantaneous forward pulse, the constant of the permanent work force of the external display is magnetic; when momentary reverse pulse power into the permanent force in the inner magnet is closed, do not show force (demagnetization state). Magnetic magnetic lifting device (electro permanent lifting) both convenient lifting magnet permanent lifting operating characteristics, but also has a permanent lifting of security. The permanent lifting mainly in the lifting process retention plate-shaped or cylindrical workpiece ferromagnetic material, with a compact structure, convenient operation, strong retention, no power, and security and reliability features that will help improve handling Handling job working conditions, increase their labor productivity, so as an efficient, safe, energy-efficient new hoisting tool has been widely used in shipbuilding, engineering machinery, mold manufacturing and other industries. 

keywords: Magnetic crane, magnetic chuck, permanent lifting,