View Dr. Chris Riley's Presentation on Magnetising Systems

Bunting is a world-leading supplier and designer of magnets, magnet assemblies and magnetisers, Bunting is involved in the design and development of key components and new manufacturing techniques for the aerospace and automotive sectors.

With the aim of simplifying the manufacturing process and improving safety, Bunting’s technical engineering team developed technology for post-assembly magnetisation. Subsequently, a complex magnet assembly is constructed unmagnetized and then charged.

There are many advantages to post-assembly magnetisation. Constructing the magnet assembly is easier and the time taken is shorter. There is also a reduced risk of mistakes occurring during assembly (e.g., incorrect polarity orientation). Post-magnetisation means that the polarity and magnetic field are exactly as required for every magnetic component. This type of component consistency is ideal for the aerospace sector.

The associated Magnetising technology enabling post-assembly magnetisation comprises of a complex control and power supply with a magnetising fixture. Such Magnetisers enable post-assembly magnetisation of magnet assemblies including Halbach Arrays, Surface Mounted Magnet Rotors, and IPM Motors.

Bunting’s range of Magnetisers include bench-top and laboratory scale models (BMLC Series) for lower volume batches of magnets and magnet assemblies, with Industrial Magnetisers (BMC Series) for higher energy demands of the some of the more complex industrial applications (such as the 150kJ multi-cabinet 5kV system). All the Magnetisers are PLC-controlled with fixture temperature monitoring and HMI interfaces.

The Bunting engineering team also design bespoke magnetising fixtures for specific customer applications. In a typical application, the magnetising fixture enables the production of high homogeneity bonded-neodymium magnetic fields for applications including rotating field measurement and multipole sensors. The range of magnetising fixtures is extensive to suit the diverse types of magnetic fields, magnets and magnet assemblies. Designs include Internal Radial Multipole Fixtures which produce a multipole radial field on the internal diameter of a ring magnet or magnet assembly such as the rotor of an exterior rotor permanent magnet machine, permanent magnet stators or flywheels.

Related Technical Articles

· An Introduction to the Halbach Array

· Post Assembly Magnetisation

Bunting designs and manufactures a wide range of magnets and magnetic assemblies. Many are bespoke for specific applications. For further information on any of the products mentioned in this review, or for bespoke magnet assemblies and magnet designs, please contact us via:

Phone: +44 (0) 1442 875081

Email: sales.berkhamsted@buntingmagnetics.com

Via the Bunting-Berkhamsted website for specialist magnets, magnetic assemblies and magnetising equipment

Via Bunting-eMagnets for online purchase of Magnets and Magnetic Technology

Session Four - Q&A/Discussion Panel One - Electric & Hybrid Aircraft Design and Case Studies

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