China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Neodymium magnets (NdFeB magnets for short) are known as the“King of Magnets” because of their high performance and wide application. When choosing neodymium magnets, the magnetic energy product is one of the most important technical indicators. This article will analyze the meaning of magnetic energy product and how to choose the right neodymium magnet according to the magnetic energy product.
The Magnetic Energy Product is a core parameter of a magnet that indicates the density of magnetic energy that a magnet can provide; the larger the value, the stronger the magnetic performance of the magnet. Specifically, the magnetic energy product is the maximum (BH) value of the magnet in the second quadrant of the hysteresis loop, i.e., BHmax. The magnetic energy product of NdFeB magnets is usually in the range of 33 MGOe to 55 MGOe, and the performance grades are expressed as N33, N42, N48, N52, N55, etc., in which the numbers represent the magnetic energy product.
Custom shaped small size trapezoidal ndfeb magnets
The significance of magnetic energy product in practical applications;
In electric motors, the magnetic energy product directly affects the efficiency and volume of the motor, and a higher magnetic energy product can significantly increase the power density and reduce the volume of the motor.
For devices that require precise positioning, such as sensors and encoders, magnets with a high magnetic energy product provide a more stable magnetic field to ensure accurate signals.
Devices such as Magnetic Resonance Imaging (MRI) require magnets with a very high magnetic energy product to ensure magnetic field strength and stability.
For wind turbines, a high magnetic energy product means higher energy conversion efficiency and lower energy losses.
How to choose neodymium magnets according to the magnetic energy product?
First of all, it is necessary to choose according to the application requirements, for small electronic equipment, you can choose low magnetic energy product magnets (such as N35). For industrial motors and automation equipments, medium magnetic energy (e.g. N45) is recommended. If there is a need for high precision and high strength: give priority to high magnetic energy product (e.g. N52).
Secondly, cost is also a consideration. Higher energy-accumulation magnets are more expensive and the choice should be weighed against budget and performance requirements.
If the working environment temperature is high, you can choose high temperature resistant magnets, such as N42H, N48SH.
Magnetic energy product is a key index when selecting NdFeB magnets, which is directly related to the performance and application effect of the magnets. By clarifying the application requirements, combining the magnetic energy product parameters and environmental conditions, the most suitable NdFeB magnets can be selected efficiently.
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