JPS63201314U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図は、本考案の一例を示すフエ
ライト磁心の斜視図及び構造図。第３図は、第２
図中Ａ−Ａ′線に沿う断面図。第４図は、本考案
によるフエライト磁心の直流重畳特性を表す特性
曲線図。第５図は、中央脚磁心の空隙長が１．２
mm（ＥＥ形２個重ね）磁心の空隙幅がＡ＝１０mm
，Ｂ＝６mm，Ｃ＝３mmの時のインダクタンス対ア
ンペアターンの特性曲線。第６図は、磁心中央脚
に空隙のない時（一点実線で示す）、予め１．２
mmの空隙を設けた時（破線で示す）、磁心中央脚
に磁心断面積に対し８０％の凹部空隙を設けた時
（本考案による磁心で実線で示す）のインダクタ
ンス対アンペアターン特性曲線を示す図。第７図
、第８図、第９図及び第１０図は従来のフエライ
ト磁心の例を示す斜視図である。 １……フエライト磁心、２……凹部、３……段
状の空隙部、ＡＬ……インダクタンスの値、ＮＩ
……アンペアターン、Ａ……空隙長を１．２mm、
磁心に設けた空隙の幅１０mm、Ｂ……空隙長を１
．２mm、磁心に設けた空隙の幅６mm、Ｃ……空隙
長を１．２mm、磁心に設けた空隙の幅３mm。 1 and 2 are a perspective view and a structural diagram of a ferrite magnetic core showing an example of the present invention. Figure 3 shows the second
A cross-sectional view taken along line A-A' in the figure. FIG. 4 is a characteristic curve diagram showing the DC superimposition characteristics of the ferrite magnetic core according to the present invention. Figure 5 shows that the air gap length of the central leg core is 1.2.
mm (2 EE type stacked) The air gap width of the magnetic core is A = 10 mm
, B = 6 mm, C = 3 mm, the characteristic curve of inductance versus ampere turns. In Figure 6, when there is no air gap in the center leg of the magnetic core (indicated by a solid line), 1.2
The inductance vs. ampere-turn characteristic curves are shown when an air gap of mm is provided (indicated by a broken line), and when a concave air gap is provided in the center leg of the magnetic core by 80% of the cross-sectional area of the magnetic core (indicated by a solid line in the magnetic core according to the present invention). figure. FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are perspective views showing examples of conventional ferrite magnetic cores. 1... Ferrite magnetic core, 2... Concavity, 3... Step-shaped gap, AL... Inductance value, NI
...Ampere turn, A...Gap length 1.2mm,
The width of the air gap provided in the magnetic core is 10 mm, B...the air gap length is 1
．． 2 mm, the width of the air gap provided in the magnetic core is 6 mm, C...the air gap length is 1.2 mm, and the width of the air gap provided in the magnetic core is 3 mm.

Claims (1)

【実用新案登録請求の範囲】 １ フエライト磁心に於て、磁路となる脚の突合
せ先端部を磁心側面に対して平行に凹状の形状と
する事により、此のフエライトを用い構成するイ
ンダクタのコイルに直流電流が重畳した時、電流
の値が小さい時はインダクタのインダクタンスの
値が大きく、直流重畳電流が大きい時はインダク
タンスの値が小さい、直流重畳電流の値に対し非
線形インダクタンス特性を持つインダクタ用フエ
ライト磁心。 ２ １項記載の実用新案登録請求の範囲に於て、
磁路となる脚の突合せ部に空隙部を形成する凹部
の面積を磁心突合せ部断面積の８０％以上とし、
又、空隙長さにより定格負荷電流に於けるインダ
クタンスの値を決める構造としたフエライト磁心
。[Claims for Utility Model Registration] 1. In a ferrite magnetic core, the abutting tips of the legs that form the magnetic path are shaped concavely in parallel to the side surface of the magnetic core, thereby creating an inductor coil using this ferrite. For inductors that have non-linear inductance characteristics with respect to the DC superimposed current value, when a DC current is superimposed on the DC current, the inductance value of the inductor is large when the current value is small, and the inductance value is small when the DC superimposed current is large. Ferrite magnetic core. 2 In the scope of the claim for utility model registration stated in paragraph 1,
The area of the recess that forms the gap in the abutting part of the legs that becomes the magnetic path is 80% or more of the cross-sectional area of the abutting part of the magnetic core,
In addition, the ferrite magnetic core has a structure in which the inductance value at the rated load current is determined by the air gap length.