JPS6193607A - Inductance and inductance changing method - Google Patents

Abstract

PURPOSE:To perform adjusting work readily and simply and to make it possible to perform fine adjustment, by laminating a plurality of ring cores, in which gaps are provided, winding wire around the ring cores, appropriately rotating the ring cores, thereby adjusting magnetic resistance. CONSTITUTION:A part of the circumference of each ring core 1, which comprises a magnetic material, e.g., ferrite and the like, and has a specified thickness, is cut out and a gap 2 is formed. The ring cores are laminated so that the gaps 2 are not overlapped. A piece of wire 3 is wound around the ring cores 1 as specified. Both ends of the winding 3 are inserted into a through hole of a printed wiring board 4. Both ends are bonded to the boards together with other mounted parts by solder dipping and the like. The circuits units mounted on the printed wiring board 4 are adjusted. The inductance is adjusted by rotating the ring cores 1, i.e., by moving the positions of the gaps 2, and changing the magnetic resistance of the core. After the adjustment, the entire ring cores are bonded and fixed by a bonding material and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an inductance wound around a ring core with a gap and a method of varying the inductance by rotating the ring core with a gap to change the inductance.

Electronic components that make up an electronic circuit, such as inductance, are manufactured by determining the core material, type of winding, and number of turns based on design values in advance. Depending on the parts or wiring pattern,
Since the inductance value often differs from the design value and the desired characteristics cannot be obtained, there is a desire to develop a method of varying the inductance that can adjust the inductance value without changing the number of turns or the like.

[Conventional technology]

Conventionally, the method of adjusting the inductance of a high-frequency coil with a predetermined winding around a ring core was generally to increase or decrease the number of turns wound around the ring core, but since such a high-frequency coil has a small number of turns, Fine adjustment is not possible.

(Problems to be Solved by the Invention) The method for varying the inductance described above has the problem that the number of turns cannot be increased or decreased unless the mounted high-frequency coil is removed, and furthermore, fine adjustment is difficult. Therefore, there was a drawback that a large number of man-hours were required for adjustment work.

[Means for solving problems]

The present invention solves the above problems and provides an inductance and an inductance variable method that facilitates fine adjustment. In the method of varying the inductance of a wire-wound structure, the core is formed by stacking a plurality of gapped ring cores, and the gap position of the gapped ring cores is changed.

[Effect]

The above inductance variable method stacks a plurality of ring cores with gaps, winds the ring cores, and adjusts the magnetic resistance by appropriately rotating the ring cores.
After fine adjustment of the inductance is completed, the ring core is fixed with an adhesive or the like.

[Embodiments] Hereinafter, embodiments of the inductance and the inductance variable method according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a ring core for explaining an embodiment of an inductance and an inductance variable method according to the present invention.

A gap 2 is formed by cutting out a part of the circumference of a ring core l having a predetermined thickness and made of a magnetic material such as ferrite.

FIG. 2 is a perspective view for explaining an implementation example of the inductance variable method according to the present invention, and parts equivalent to those in FIG. 1 are given the same reference numerals.

The ring cores 1 explained in FIG. 1 are stacked so that their gears 2 do not overlap. After winding the ring core l in a predetermined manner, both ends of the winding 3 are inserted into the through-holes of the printed wiring board 4, and bonded together with other mounted components using solder dip, etc., and attached to the printed wiring board 4. The mounted circuit unit is adjusted.In this case, the inductance is adjusted by rotating the ring core 1, that is, moving the position of the gap 2 of the ring core 1, and changing the magnetic resistance of the core to adjust the inductance. After completion, the entire ring core is fixed with an adhesive or the like.

Although the present embodiment has been described using six ring cores 1, the number is not limited to six, and the thickness of the ring cores 1 may be adjusted depending on the degree of adjustment.

〔Effect of the invention〕

As is clear from the above description, the inductance and inductance variable method according to the present invention have the advantage that adjustment work can be easily and simply performed, and fine adjustment can be made.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a ring core for explaining an embodiment of the inductance and variable inductance method according to the present invention, and FIG. 2 is a perspective view for explaining an implementation example of the variable inductance method according to the present invention. It is. In the figure, 1 indicates a ring core, 2 a gap, 3 a winding, and 4 a printed wiring board. Figure 1 Figure 2

Claims (2)

[Claims] (1) An inductance characterized in that the core is constructed by laminating a plurality of cores with gaps. (2) In the inductance variable method in which the core is wound with a wire, the core is formed by stacking a plurality of gapped cores, and the gap position of the gapped cores is changed. and inductance variable method.