Alabama-based firm Correlated Magnetics Research (CMR)has developed a new programmable permanent magnet that could pave the way for new applications.
CMR's new technology can magnetise a permanent magnet to give it hundreds of north and south poles on the same surface, rather than just one north and south pole. The magnetisation is carried out by a machine and is controlled by software capable of magnetising small surface areas with great precision and in a variety of patterns.
The technology can create magnets capable of novel behaviours, potentially opening up opportunities for new applications where a high degree of precision or a particular type of magnetism is required.
Given the broad range of potential applications for polymagnets, they are likely to not only drive demand for conventional permanent magnets, but also for neodymium ferrous boron (NdFeB) magnets — particularly when power and small size are essential.
The potential applications for CRM's technology range from electrical through to mechanical functions. The US Navy for example, has taken an interest in the technology's potential for creating frictionless gears which would significantly reduce maintenance needs and costs for its vessels.
While the pursuit of magnetic frictionless gears is not new, the use of polymagnets adds a new dimension to the concept.
CMR is looking to licence its technology to other firms to speed up the adoption of polymagnets. The firm has filed over 120 patents for the technology.
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