Characterising magnetic materials and sensors
Electrical and magnetic quantities have an impact on many aspects of our everyday life. In health and safety, the magnetic field levels produced by domestic and industrial appliances, such as white goods, MRI and wireless power transfer, are carefully monitored by the manufacturers to meet EMC regulations and human exposure limits to magnetic fields.
In the automotive industry, the material properties of magnets have become very important. Most cars now contain between 70-100 magnets, many of which are in safety critical applications. To assist the development of hybrid and electric propulsion, the magnets and soft magnetic materials used in electric motors need to be characterised in typical operational conditions to enable the design, prototyping and production of novel motor topologies to limit carbon emissions.
In the aerospace industry, magnetic materials are used in harsh environments where the material properties may vary significantly from initial manufacture to the end-of-life condition. We develop bespoke measurement systems to allow these materials to be characterised, and compared against well established written standards.
The demand for traceable electrical and magnetic measurements continues to broaden as new materials and techniques have extended their use into new areas of industry. NPL continuously develops and extends its range of measurement techniques and facilities for both magnetic materials and sensors. The majority of calibration services offered are accredited by UKAS in accordance with ISO 17025.