SU830558A1 - Magnetic bias field source for magnetic cylindrical domain storage - Google Patents

Description

(54) HCTOHriHK MAGNETIC FIELD DISPLACEMENT FOR THE DRIVE ON CYLINDRICAL MAGNETIC DOMAINS

one

The invention relates to computing and. can be used in storage devices on cylindrical magnetic aomenes (CMD) to create a bias field, ensuring the stable existence of the CMD.

A source of a magnetic bias field for a CMD accumulator, containing parallelly arranged plates of magnetically soft material, magnetically fixed between the plates at their opposite sides, and a unit for adjusting the magnetic field with threaded holes to accommodate the magnetic shunt perpendicularly magnetically the surface of the magnets. the source is the presence of external magnetic fields in relation to the magnetic system, as well as the difficulty of adjusting the magnitude of the magnetic field by several shunts.

The closest technical solution to the invention is the source

magnetic bias field for a CMD accumulator, which contains a body made of ferromagnetic material, inside which two flat permanent magnets with pole tips are located opposite each other. In this source, the body acts as a magnetic conductor and serves as an electromagnetic shield. The location of the magnets inside the case leads to the elimination of external to the magnetic system of the slit fields. In addition, the shape of the magnets in the form of flat plates, their consistent arrangement in the magnetic circuit and close placement to the interpolar space provides good uniformity of the magnetic field 2.

Claims (2)

The disadvantage of this source is the absence of an uzp adjustment of the magnitude of the field in the interpolar space and the associated difficulty in obtaining a given magnetic field strength with the required accuracy (about 1%). Indeed, in a known source, in order to achieve a given magnetic field strength, magnetization and partial demagnetization need to be carried out several times, in order to pick up the magnetic induction, which provides the necessary magnetic field strength, and when working with different samples of sources of the same type, a certain geometric spread is observed and magnetic parameters, achieving a predetermined intensity is even more complicated and requires multiple magnetization and multiple particle sizes. gnichivani samples. An idle circuit is an increase in the accuracy of setting the intensity of the magnetic field of displacement. Delivered pell is achieved by the fact that the source contains a regulating ferromagnetic rod located in the gap between one of the flat permanent magnets and the body of a ferromagnetic material. The drawing shows the design of the source of the magnetic mixing field for a storage device on a CML. The source contains a body 1 of ferromagnetic material, inside which two flat permanent magnets 2 and 3 with positive tips 4 and 5 are opposite each other. One of the magnets 2 is attached to the body 1 directly and the other magnet 3 is connected to the body Lining pads 6 and 7 to form a gap A regulating ferromagnetic rod 8 is placed in the gap. Fiberglass laminate is used as the lining material 6 and 7. The rod 8 is made nz siliceous iron. K (shus, magnets, magnetic tips are connected at the source when gluing. The magnetic field strength is adjusted as follows. When the end of the rod moves; Е1 in the gap, the magnetic resistance of the gap changes, which leads to a change in the magnetic field strength of the source. In In the process of filling the gap with the rod 8, the magnetic field strength increases, and when the end of the rod ends is removed, the magnetic field strength of the source decreases. the source field in serial production, the rod 8 can be welded to the housing. Claims of the Invention The source of the magnetic mixing field for storage on cylindrical domains, comprising a housing made of ferromagnetic material, inside of which two flat permanent magnets with pole tips are located opposite each other, that, in order to improve the accuracy of the installation of the intensity: Magnetic ao l displacement, it contains a regulating ferromagnetic rod located in the gap between one of the flat gauges and magnets of ferromagnetic material body. Sources of information taken into account during the examination 1. USSR author's certificate J 577562, cl. Q 11 C 5 / OO, 1977. 2. US Patent No. 4О27298, cl. 34O-174, published. 1977 (prototype).