Electromagnets are assembly products which require an external voltage power source to provide an electric current to operate the electromagnet. Electromagnets are also called Solenoids (a solenoid is basically a wound copper coil). The electromagnets contain a wound coil of multiple turns (a solenoid) which when carrying an electric current creates a magnetic field. The magnetic field from the coil remains for as long as the current is applied as soon as the current is turned off (e.g. turning off the power supply) the generated magnetic field disappears.
Electromagnets that contain only a coil (solenoid) will clamp to ferromagnetic surfaces (such as mild steels) only when an electric current is present remove the current and the electromagnet stops clamping. They are termed Energise to Hold Electromagnets.
Electromagnets that contain a magnet plus a coil (solenoid) will clamp to ferromagnetic surfaces (such as mild steels) only when no electric current is present apply the current and the electromagnet stops clamping for as long as the current is applied (remove the current and the magnet with the electromagnet starts clamping again). They are termed Energise to Release Electromagnets but are also known as Electro-Permanent Magnets. The Energise to Release Electromagnets are always on when no current is present.
Electromagnets are also known as solenoids, electropot magnets, electromagnetic pots, and electric pot magnets. Although be aware that a solenoid is also just a simple wound copper coil, often cylindrically shaped, with nothing inside the coil that is a source of electromagnetic fields (e.g. magnetising coil fixtures).
Our electromagnets / solenoids / electro-permanent magnets are sturdy and robust, designed for demanding applications. Low electrical input power yet high holding force performance - efficient clamping with the overall heat rise kept acceptably low.
Typical applications include, amonst others, access control electromagnets, machine guard electromagnets, fire door electromagnets, security magnets, electroholding magnets, solenoids, door holding, machinery protective bay closures, assembly line fixtures, machine tooling, high force clamping applications, etc.
ENERGISE TO HOLD ELECTROMAGNETS (SOLENOIDS)
Electrical current is required to turn the magnet ON. Power is removed to turn the magnet OFF
ENERGISE TO RELEASE ELECTRO-PERMANENT MAGNETS
Electrical current is required to turn the magnet OFF. Power is removed to turn the magnet ON
ARMATURE PLATES / ELECTROMAGNET CLAMPING PLATES
The Energise to Hold and Energise to Release Electromagnets, Solenoids, Electro-holding magnets and Electro-permanent magnets require a ferrous surface to clamp onto - the Armature Plates are designed to get the best performance from the electromagnets (you can always use your own ferrous surfaces instead if you do not require the Armature Plates).
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Electromagnet energise to hold magnets overview brochure in PDF format
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Electro-permanent energise to release magnets overview brochure in PDF format