Types of lifting magnets

The permanent magnet is generally used at the job site using the control handle to connect and disconnect. And they may be used to move the flat material can also be transported round parts of less than 2,200 pounds. These lifting equipment for 'self-contained', cutting magnets can be moved to a different place of work in the machine shop at any time, but a disadvantage of the permanent magnet is limited lifting capacity.
Solenoid electrical excitation and materials to breathe on the surface of the magnet. The solenoid energization coil is wound around the core, the particles inside the iron material arranged in a common direction, the magnet thus producing a magnetic field. Electromagnet generally work with DC, so rectifiers. The different is that the permanent magnet, the electromagnet requires a constant power source, and this may be due to the purpose of the solenoid is not be regarded as a drawback is to be regarded as an advantage. Electromagnet, power failure may be catastrophic, despite the multi-power supply and battery backup system available on the market today can be used to solve these problems. The other hand, when compared with the permanent magnet, the electromagnet can be changed the ability to provide greater flexibility for the user of the energizing current.