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Arc Magnets
Arc magnets can be made from powerful neodymium. They are often used in electric motors, alternators and generators or to create renewable energy from wind, solar and hydro power sources. Stators and Rotors inside electric motors use permanent magnets in the shape of an arc.
The arc magnet segments enable rotational movement by arranging the magnets with alternating negative and positive poles on the inside and outside diameters. This creates the attractive and repelling magnetic force inside the cylindrical motor body that is required to generate rotational movement at the driveshaft. The magnetic force and rotational speed is controlled by increasing or decreasing the electromagnetic field strength inside the windings. Magnetic fields that are generated by Permanent magnets to drive DC electric motors help conserve battery life. This makes cordless power tools convenient and provides a viable option to mains powered electric tools and appliances.
Other Arc Magnets are made from the significantly lower strength Alnico alloy which is widely used to produce typical Horseshoe-style magnets. Horseshoe shaped magnets are essentially a curved Bar magnet that has the North and South poles in much closer proximity. This increases the strength of the magnetic field and gives the magnet more holding power. It also reduces the level of demagnetisation that is a common problem with Alnico magnetic products and a metal keeper plate is also required for this purpose.
FAQ
What are arc magnets and what are they used for?
Arc magnets are curved magnets, often made from Neodymium, and are widely used in Direct Current (DC) motors, speakers and magnetic couplings. Despite their specialised appearance, Arc magnets are among the most commonly used magnets, particularly where circular or rotational magnetic fields are needed, such as in electric motors and pumps.
Why are arc magnets ideal for DC motors?
Arc magnets are shaped to fit the curved interior of a motor housing, where they create a consistent magnetic field that helps convert electrical current into mechanical motion. The powerful magnetic properties of Neodymium Arc magnets make them essential in DC motors, which are used in power tools, home appliances and portable devices, especially where it is important to have strength, durability and efficiency.
How are Arc magnets used in non-motor applications?
Besides motors, Arc magnets are used in magnetic couplings, where they help regulate or transfer power without direct contact, such as in liquid pumps or propeller systems. Neodymium Arc magnets sometimes found in audio speaker systems to improve sound quality by enhancing the signal-to-noise ratio.
What makes Neodymium Arc magnets better than other types?
Neodymium arc magnets are preferred because of their high magnetic strength in a surprisingly compact size and also for their ability to withstand repeated use in mechanical and electronic systems. The durability and precision fit of Neodymium Arc magnets make them highly effective in both industrial and consumer-level applications, from high-performance tools to everyday appliances.
Alnico Horseshoe Magnet - 75mm x 38mm x 9mm
Code: 49011
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Alnico Horseshoe Magnet - 5.08cm x 2.54cm x 6.35mm | Pull Force 1.36kg
Code: MCT07225
Pull Force: 1.36kg
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Alnico Horseshoe Magnet - 51mm x 41mm x 16mm
Code: 49015
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Alnico Horseshoe Magnet - 100mm x 85mm x 33.5mm
Code: 49017
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