How to increase the magnetic strength of NdFeB magnets?

How to increase the magnetic strength of NdFeB magnets?

With the continuous development of science and technology, the application of magnetic power has been continuously deepened. Many users may be curious, how do permanent  magnet manufacturer  how strengthen the magnetic force, and which are the technical methods?


There are two common methods that can strengthen the magnetic power of strong NdFeB permanent magnet: change the size and material. In terms of the size, if the contact area is large, the thickness is thin, then increasing the thickness of the magnet will have a great effect on the strengthening of the magnetic power. If the contact area is small and the thickness is relatively thick, then the increase of the contact area of the magnet will directly change magnetic force.

Speaking of changing the material, NdFeB magnetic material is divided into various material grades. If the dimensions of the magnet are strictly limited, changing the material grade will be a feasible option.

Due to varying unanticipated circumstances, strong magnets may lose their magnetic strength over time, which render the magnets not strong enough and suitable for original application. What should we do to re-enhance the magnetism of the powerful magnets? Below are methods from NdFeB magnets  manufacturer:
1. The easiest way is to re-magnetize the magnets to their full magnetized condition.
2. Using magnet circuit designing method to gather magnetic flux in the yoke to generate strong suction.
3. To concentrate the magnetic line of force: absorb an iron plate the magnets and a higher magnetic field can be generated on the edges of the iron
4. To cover the magnets with a steel housing and only expose one contact area of the magnets and concentrate all magnetic power on the contact area

Tags: How to increase the magnetic strength, NdFeB magnets, permanent magnet, magnet manufacturer, strong magnets

NdFeB Magnets Applied in Wind Power Motor 20170901

NdFeB Magnets Applied in Wind Power Motor 20170901
Penetration rate of direct drive motor has broad space of growth.
Generators of wind turbines mainly include double feeding and direct drive motors. Direct drive generator sets are driven by multi-pole NdFeB motors directly linking with impellers, without using traditional gear box. Generators will be more efficient and have smaller polar distance, if they employ rare earth permanent magnet motor technology, therefore, PM direct drive motors become major trend of technical development in the future, with gradually rising penetration rate in wind power sets.


In 2016, new installed capacity of global wind power sets reached 546.42 million kilowatts, among which penetration rate of direct drive motor was 35%. 0.67kg of NdFeB magnets were applied in installed capacity of per kilowatt. According to this calculation, 1275 million tons of neodymium magnets were globally used in wind power sets in 2016. Based on estimation, by 2021, installed capacity of newly increased wind power send will reach 750 million kilowatts; therefore, growth rate of newly increased installed capacity is 6.5% in the world. Suppose that in 2017 and 2018, penetration rate of PM direct drive motor of wind turbines rises by 1%, then 1396.7 million tons and 1528.7 million tons of sintered NdFeB permanent magnets will be used in wind power worldwide, with year-on–year growth rate of 9.54% and 9.46%.
China Rare Earth Magnet Limited manufactures many types of neodymium motor magnets, if you have such demand, welcome to contact us!
Tags: NdFeB magnet, motor magnets, permanent magnets, China magnet, magnet manufacturer