Magnet Solutions at Engineering Design Show

09 October 2018

The ability to design bespoke magnetising fixtures for post assembly magnetising of magnetic assemblies will be the focus for Bunting Magnetics on stand C22 at the Engineering Design Show (Ricoh Arena, Coventry, UK, 17-18 October 2018).

The ability to design bespoke magnetising fixtures for post assembly magnetising of magnetic assemblies will be the focus for Bunting Magnetics on stand C22 at the Engineering Design Show (Ricoh Arena, Coventry, UK, 17-18 October 2018).

Bunting Magnetics is a world leader in the supply of Magnetisers (Chargers) and Fixtures, Bespoke Technical Magnetic Assemblies and Magnets . The European manufacturing and design headquarters are based in Berkhamsted in Hertfordshire.

Permanent magnets and magnetic assemblies are fundamental to the operation of electric motors, wind turbines, computers, and cars. There is a rise in the product design of new technology that replies on high intensity magnetic forces. However, very strong permanent magnets, such as Neodymium, are difficult and dangerous to handle.

Post-assembly magnetisation of permanent magnet assemblies offers many advantages in the design and manufacturing process. There are considerable savings in assembly time due to the difficulties of handling charged magnets. Handling magnetised parts can also be difficult with considerable thought needed for health and safety of the workforce. Equally, it is easier to safely store a magnet assembly if it has not been magnetised.

The ability to model magnets after magnetisation during the design phase is an invaluable tool in assessing the feasibility of post assembly magnetisation. Bonded isotropic permanent magnetic rotors and sintered Halbach permanent magnet rotors are both ideal for post assembly magnetisation.

There are a number of key design criteria to consider when magnetising sintered Neodymium Iron Boron (NdFeB) magnet rotors. The design process must include consideration of saturating the pole transition regions. Equally, the right energy required to saturate the whole rotor is fundamental to the design. In order to post-assemble magnetise a compromise in system design may be needed.

In all projects, the method of magnetisation should be considered as early as possible in the design phase.

Bunting’s engineering team, based at their UK headquarters in Berkhamsted, are tasked with designing magnet assemblies that can then be magnetised post-assembly. Using onsite magnetisers and modelling, the engineers are able to determine the optimum configuration for a specific application. This UK-based expertise is unique.

On stand C22 at the Engineering Design Show, Bunting’s engineers will be on hand to discuss and offer advice specific magnet applications.

For additional information on the technology mentioned in this article please contact Paul on 07909 103789 or press@buntingeurope.com or visit www.buntingeurope.com.

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