What Type Of Magnet Is Suitable For The Electric Car Motor?

There are many applications that do not require the strength and power of rare earth magnets like Neodymium and Samarium. A popular option for both industrial and commercial use is Ferrite magnets in Brisbane that are abundant, versatile and affordable. Ferrite magnets can be the effective solution when you are looking for magnets that are highly resistant to demagnetization.

There are four main types of magnets: ceramic (ferrite magnets), Alnico magnets that consists of iron, aluminium, nickel and cobalt, Samarium Cobalt magnets and Neodymium magnets. How do car manufacturers choose the right type of magnet that is suitable for the motor of an electric car?

The powertrain of cars slightly differ from traditional internal combustion engines. Rare earth magnets are used to help power electric cars however, these types of magnets are expensive and complex to fabricate. The most common choice of car makers is usually the Neodymium magnet because it possesses all the characteristics that manufacturers require for their electric cars. Neodymium magnets are the strongest rare earth magnets and highly resistant to corrosion.

If the strength of the magnet will be the basis it is important to determine the power of the magnet based on remanence and coercive force. Remanenceis measured through the residual flux density or the amount of force that is necessary to pull it from steel or a magnet of similar size. Meanwhile, cohesive force is the effort needed to demagnetize a rare earth magnet. The Neodymium magnets excel in both remanence and cohesive force.

However, Neodymium magnets have a downside, operating temperature. Once the magnet surpasses 80oC (176oF), a reversible loss of magnetization occurs. The solution is to infuse Neodymium magnets with heavier rare earth metals to increase the temperature when they operate. But the problem is loss of strength or remanence.

If you are shopping for Ferrite magnets in Brisbane, they are available in blocks, discs, rings and pots of various sizes. Since there is an abundant stock of Ferrite magnets, they are usually cheep and highly affordable for your project. Additionally, if you buy the magnets in bulk of 10 or more magnets, you can take advantage of 30% discount.