Holding Magnets
Holding magnets produce a magnetic field between the North and South poles on the holding surface.
Types of holding magnet:
1. Electromagnetic holding magnets:
The ferromagnetic part is held in place on the holding magnet’s attraction surface when power is supplied to the coil. When the holding magnet is not powered, the electromagnetic force is removed and the ferromagnetic part is released.
2. Electro-permanent holding magnets with integrated permanent magnet
A ferromagnetic part is held in place on the holding magnet thanks to a permanent magnet that is integrated in the holding magnet and continues to hold the part when no current is applied.
The magnetic field created when the coil is powered is opposite to that of the permanent magnet and cancels out its action. This releases the ferromagnetic part located on the attraction surface.
The force induced by the permanent magnet is present again when the supply voltage is interrupted, thus attracting the ferromagnetic part.
MacMillan Dictionary https://www.macmillandictionary.com/dictionary/british
Technical explanations for holding magnets // Binder-Magnetic https://www.binder-magnetic.com/documentation/technical-explanations-for-holding-magnets/?lang=en