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Using Halbach Array on Magnetic Rotor Assembly

China Magnets Source Material Limited is a professional manufacturer for permanent magnets, halbach array and magnetic rotor assemblies.

Our magnetic rotor assemblies feature precision and complex, including a wide variety of permanent magnets:

  1. Samarium Cobalt (SmCo)
  2. Neodymium Iron Boron
  3. Ferrite
  4. AlNiCo

Halbach array structure is one of rotor assemblies we made for customer worldwide.

What is halbach array?

Description from Wikipedia: A Halbach array is a special arrangement of permanent magnets that augments the magnetic field on one side of the array while cancelling the field to near zero on the other side.

At present, the permanent magnet motor is developing toward high power, high function and miniaturization. The high power density and high efficiency are the common requirements for all types of permanent magnet motor design.

According to principle of motor design, the increase of magnetic loading is to increase the motor gap magnetic flux density, which can reduce motor size and improve the power density.

For permanent magnet motor, generally, there are two measures to increase air gap flux density in motor.

  1. Change magnetic material: try to use permanent rare earth magnet with higher residual magnetic flux density. But restricted by magnet material performance and price, the actual alternatives are few.
  2. Change magnet structure and arrangement

Halbach array is a new type of permanent magnet arrangement combined with radial and tangential array, which can increase the magnetic field on one side of and weakened the magnetic field on the other side.

Using Halbach array in permanent magnet motor can increase the magnetic flux in the air gap and decrease the magnetic flux in the rotor yoke, and it is most suitable for the inner rotor or outer rotor of the external permanent magnet.

In brief, its application in the permanent magnet motor has great advantages:

  1. Sine wave of air-gap magnetic field
  2. Good magnetic shielding effect
  3. High power density
  4. Light weight
  5. Small in size

Neodymium magnets play a very important role in the renewable energy market. So we believe this halbach motor could find a broad range of industrial and automation applications, from electric vehicles, aerospace, independent power generation to other occasions.

China Magnets Source Material Limited has a wealth of experience in permanent magnet industry over 20 year. Please feel free to contact us if you need permanent magnets, halbach array magnets or motor rotor assembly.

We know how to:

  1. Select the right magnets
  2. Choose the suitable coating
  3. Design optimization
  4. Magnet production
  5. Assembling components
Contact information
China Magnets Source Material Limited
Tower B, Qiongzhu Building,
Huawang Rd,Longhua District,
Tel: +86 755 28174720
Fax: +86 755 28174720