Programmable magnets , or polymagnets are magnetic structures that combine magnetic patterns correlated with alternating polarities, designed to achieve desired behavior and provide stronger local strength. By varying the magnetic field and strength, different mechanical behavior can be controlled.
The correlated magnetic pairs can be programmed to draw or reject with the specified strength and spacing of engagement, or, to withdraw or reject on a particular spatial orientation. Correlated magnets can be programmed to interact only with other magnetic structures that have been coded to respond. The correlated magnet can even be programmed to pull and deny at the same time. Compared with conventional magnets, correlated magnets provide stronger holding forces to targets and stronger shear resistance. The programmable behavior is achieved by creating a multipole structure consisting of several magnetic elements (maxels) of different sizes, locations, orientations, and saturations. Maxels size ranges from 1 mm to 4 mm. With overlapping of these maxels, very complicated magnetic fields can be produced. There are four main functions that a correlated magnet can perform: align, install, lock, and spring.
Programmable magnets can be programmed, or encoded, by varying the polarity and/or field strength of each source of the magnetic source array composing each structure. The resulting magnetic structure can be one dimensional, two dimensional, three dimensional, and even four dimensional if produced using electromagnetic arrays.
The associated magnetic structures can be developed from ferrites, rare-earth materials (eg Neodymium magnets, Samarium-cobalt magnets), ceramics, and electromagnets, and their correlation effects can be increased from very large permanent magnets to nanometer-scale devices. The multipole magnetic device can be constructed from a discrete permanent magnet, or by exposing a heated magnetized material to a coded magnetic field.
The correlated magnet science was invented in 2008 by Larry W. Fullerton in his laboratory at Cedar Ridge in North Alabama. Correlated Magnetics Research (CMR) was formed to pursue the research and development of Codet Magnets technology and to license the technology to business entities throughout the industry. More than 65 patents have been filed for technology in the US and around the world. Correlation Magnet Research uses the term "polymagnet" for this technology. The coding theory used to design radio frequency signals in communications and radar is applied to form a correlated magnetic magnetic region. The discovery was announced during a press conference in October, 2009, in Huntsville, Alabama. The world's first 3D magnetizing printer was developed by CMR, called MagPrinter. This printer consists of a magnetizing coil in a cabinet with a motion control system. A polymagnet can be easily made from reprogramming a conventional magnetic material within minutes.
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Apps
The correlated magnet is an enabling technology that can produce a very strong but safe industrial magnet. For small size applications, correlated magnets can be used in positioning devices, consumer electronics, magnetic coupling, and vehicle attachments. Potential applications include attaching and releasing work-holding mechanisms, magnetic separators, liquid seals and valves, motors and motion controls, factory automation, prosthetics, security devices, and power plants. The associated magnet is a relatively new technology in history. More applications and research opportunities will be explored.
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References
Source of the article : Wikipedia
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