These permanent electromagnets are electrically powered on / off systems. They consist of a permanent magnet and a DC excited coil to neutralize the permanent magnetic field at the poles.
These systems are used in a powerless state where a load, a workpiece or machine parts must be held reliably and safely. The housing is completely zinc plated and the coil is vacuum-stoppered.
The difference between a regular cylindrical electromagnet and a permanent electromagnet is that a permanent electromagnet always is ON (magnetic) when you don't give it power. And OFF (non-magnetic) when you give it electricity. Our Electro permanent magnets has a low ED, this means that they cannot be connected for very long. The usual time for a Connection is approx 8 seconds per minute! (ED's is a percentage measure of the connection time. If the magnet are supposed to work shorter (lower ED), you can increase voltage and get more power).
The stated forces have been determined at room temperature on a plate in polished steel (S235JR according to DIN 10 025) with a thickness of 10 mm (1kg ~ 10N). A maximum deviation of -10% compared to the specified value is possible in exceptional cases. Value is exceeded in general. Depending on the type of application (installation situation, temperatures, counter anchor etc.) the forces can be influenced enormously. The indicated values are serving as an orientation.