Presentation Information
[15p-PB1-42]Development of a Permanent-Magnet Magnetic Levitation Device with a Pseudo-Halbach Array
〇(M1)Hayato Toeda1, Yasuhiro Ikezoe1 (1.NIT)
Keywords:
diamagnetism magnetic levitation,magnetic field simulation,permanent magnet
The diamagnetic levitation device that we previously developed [1] has the advantages of being fabricated at very low cost using permanent magnets and of enabling continuous levitation of objects with nearly zero energy consumption under static, room-temperature conditions. The device consists of two pairs of rectangular permanent magnets assembled by utilizing the attractive force between the magnets, and levitation of droplets with diameters of approximately 0.3 mm has been demonstrated. In this experimental system, water droplets are formed by collecting fine mist droplets generated by a humidifier into the experimental chamber. However, to broaden the range of applications, it is desirable to develop a system in which larger droplets, with diameters of around 1 mm, can be directly transferred into the levitation region and levitated using experimental tools such as a micropipette.
For example, the use of a Halbach array, which is well known as a magnet configuration that enhances magnetic fields, is expected to enable the generation of much stronger magnetic fields and thereby allow the levitation of larger liquid droplets. Motivated by this idea, we undertook the development of a magnetic levitation device incorporating a pseudo-Halbach array and succeeded in levitating a droplet with a diameter of approximately 700 μm, which is the largest droplet successfully produced to date. Although the inability to form a 1-mm-diameter droplet may be attributed to slight misalignments in the magnet configuration, the present results demonstrate that a pseudo-Halbach array can bring about significant advances in the development of magnetic levitation devices.
For example, the use of a Halbach array, which is well known as a magnet configuration that enhances magnetic fields, is expected to enable the generation of much stronger magnetic fields and thereby allow the levitation of larger liquid droplets. Motivated by this idea, we undertook the development of a magnetic levitation device incorporating a pseudo-Halbach array and succeeded in levitating a droplet with a diameter of approximately 700 μm, which is the largest droplet successfully produced to date. Although the inability to form a 1-mm-diameter droplet may be attributed to slight misalignments in the magnet configuration, the present results demonstrate that a pseudo-Halbach array can bring about significant advances in the development of magnetic levitation devices.