WO-2026095299-A1 - ALTERNATING MAGNETIC FIELD GENERATING DEVICE USING HALBACH ARRAY MAGNET

Abstract

The present invention relates to an alternating magnetic field generating device using a Halbach array magnet, and the alternating magnetic field generating device using a Halbach array magnet, according to one aspect of the present invention, comprises: a ring gear which has a plurality of teeth formed on the outer circumferential surface thereof and rotates by receiving rotational power from an external motor; and a rotating body which has a hollow portion formed at the center and is composed of a plurality of permanent magnets that are fixedly installed on the inner circumferential surface of the ring gear and are arranged in a Halbach array, so as to generate an alternating magnetic field at the center of the hollow portion while rotating together with the ring gear.

Inventors

• HWANG, YOUNG JIN
• SEO, JEONG WOO
• YOON, JI YOUNG
• CHOI, WON TAE
• SO, SOON HO
• SON, BYUNG HUN

Assignees

• 국립한국해양대학교 산학협력단

Dates

Publication Date

20260507

Application Date

20250828

Priority Date

20241030

Claims (6)

1. A ring gear having multiple teeth formed on its outer surface and rotating by receiving rotational power from an external motor; and An alternating magnetic field generating device using a Halbach array magnet, comprising: a rotating body that is fixedly installed on the inner circumference of the ring gear and is composed of a plurality of permanent magnets having a Halbach array, has a hollow formed in the center, rotates together with the ring gear, and generates an alternating magnetic field at the center of the hollow.
2. In paragraph 1, The above permanent magnet is Those that have different magnetization directions, but have the same magnetization direction when facing each other. Alternating current magnetic field generator using a Halbach array magnet.
3. In paragraph 1, An alternating magnetic field generating device using a Halbach array magnet, further comprising: a pair of iron cores installed facing each other on the inner circumference of the rotating body, having a predetermined shape according to a preset waveform so that the alternating magnetic field generated in the hollow according to the rotation of the rotating body has a preset waveform.
4. In paragraph 3, The above iron core is The end extending from the inner circumference of the above-mentioned rotating body toward the center of the above-mentioned hollow is formed in a horn shape having a vertex, thereby causing the waveform of the above-mentioned alternating magnetic field to become a triangular wave. Alternating current magnetic field generator using a Halbach array magnet.
5. In paragraph 3, The above iron core is The end extending from the inner circumferential surface of the above-mentioned rotating body toward the center of the above-mentioned hollow is formed in a shape having a curved surface corresponding to the inner circumferential surface of the above-mentioned rotating body. Alternating current magnetic field generator using a Halbach array magnet.
6. In paragraph 5, The above iron core is Making the waveform of the alternating magnetic field a square wave or a regular wave according to the height from the inner circumference of the rotating body toward the center of the hollow Alternating current magnetic field generator using a Halbach array magnet.

Description

Alternating current magnetic field generator using Halbach array magnets The present invention relates to alternating magnetic field generation technology. A Halbach array magnet refers to a magnet array structure that strengthens the magnetic field in some directions and weakens it in others, thereby concentrating the magnetic field in a specific direction. Because Halbach array magnets can increase magnetic flux density, they are used in situations requiring strong magnetic fields, such as in electric motors or magnetic levitation systems. Conventional alternating current (AC) magnetic field generation technology is primarily achieved by applying alternating current to a coil. Due to the nature of this technology, which generates an AC magnetic field based on the AC current while other conditions such as the coil shape remain fixed, there are limitations in finely controlling the magnitude and frequency of the magnetic field, and it is difficult to change the waveform of the AC magnetic field into various forms. In other words, conventional AC magnetic field generation technology suffers from a lack of flexibility in changing magnetic field characteristics to meet user requirements. Furthermore, strong magnetic fields are required for various applications in science and industry, but existing alternating magnetic field generation technologies face the problem of high costs in implementing such fields. FIG. 1 is a conceptual diagram of an alternating magnetic field generating device using a Halbach array magnet according to a first embodiment of the present invention. FIG. 2 is a graph showing the waveform of an alternating magnetic field generated by an alternating magnetic field generating device using a Halbach array magnet according to the first embodiment of the present invention. FIG. 3 is a conceptual diagram of an alternating magnetic field generating device using a Halbach array magnet according to a second embodiment of the present invention. FIG. 4 is a graph showing the alternating magnetic field waveform generated by an alternating magnetic field generating device using a Halbach array magnet according to a second embodiment of the present invention. FIG. 5 is a conceptual diagram of an alternating magnetic field generating device using a Halbach array magnet according to a third embodiment of the present invention. FIG. 6 is a graph showing the alternating magnetic field waveform generated by an alternating magnetic field generating device using a Halbach array magnet according to the third embodiment of the present invention. FIG. 5 is a conceptual diagram of an alternating magnetic field generating device using a Halbach array magnet according to the fourth embodiment of the present invention. FIG. 6 is a graph showing the alternating magnetic field waveform generated by an alternating magnetic field generating device using a Halbach array magnet according to the fourth embodiment of the present invention. An alternating magnetic field generating device using a Halbach array magnet according to one aspect of the present invention for achieving the aforementioned purpose comprises a ring gear having a plurality of teeth formed on its outer surface and rotating by receiving rotational power from an external motor, and a rotating body composed of a plurality of permanent magnets having a Halbach array fixedly installed on the inner surface of the ring gear and having a hollow formed in the center, which rotates together with the ring gear and generates an alternating magnetic field at the center of the hollow. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the claims. Meanwhile, the terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The present invention relates to a technology for generating an alternating magnetic field through the rotation of a Halbach array magnet. In particular, the present invention is characterized by the technical feature that the frequency, intensity, and waveform of the alternating magnetic phase can be flexibly adjusted according to the rotational speed of the Halbach array magnet and the shape of the iron core installed on the inner surface of the Halbach array magnet. Hereinafter, an alternating current magnetic field generating device using a Halbach array magnet according