JPH0257069U

JPH0257069U -

Info

Publication number: JPH0257069U
Application number: JP8628388U
Authority: JP
Priority date: 1988-06-28
Filing date: 1988-06-28
Publication date: 1990-04-25

Description

[Brief explanation of drawings]

第１図は、本考案実施例の電流検出器回路図。
第２図は、従来の電流検出器回路図。第３図ａは
、第１図及び第２図に於ける、ＶＲ２トリミング
時の(2)式右辺第１項の増幅度フアクタ変動概略
図。ｂは、第１図に於ける、ＶＲ３トリミング時
の(2)式右辺第１項の増幅度フアクタ変動概略図
。第４図は、(1)式及び(2)式それぞれの第１項の
値を一定に押えるためのＶＲ２及びＶＲ２，ＶＲ
３の分布概略図である。１…磁気ギヤツプ。２…閉磁路形磁気コア。３
…感磁素子。４…リニアＩＣ。５…コイル。 FIG. 1 is a circuit diagram of a current detector according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of a conventional current detector. FIG. 3a is a schematic diagram of the amplification factor variation of the first term on the right side of equation (2) during VR2 trimming in FIGS. 1 and 2. b is a schematic diagram of the amplification factor variation of the first term on the right side of equation (2) during VR3 trimming in FIG. 1; Figure 4 shows VR2 and VR2,VR for keeping the value of the first term of each of equations (1) and (2) constant.
FIG. 3 is a schematic distribution diagram of No. 3. 1...Magnetic gap. 2...Closed magnetic circuit magnetic core. 3
...Magnetic sensing element. 4...Linear IC. 5...Coil.

補正平１．１１．３０図面の簡単な説明を次のように補正する。明細書第９頁第１０行目以下に「第５図は電流
検出器を形成する素子の配置を示す構成図」と追
加する。Amendment 1.11.30 Hei 1. The brief description of the drawing is amended as follows. On page 9, line 10 of the specification, the following is added: ``Figure 5 is a configuration diagram showing the arrangement of elements forming the current detector.''

Claims

[Scope of utility model registration request]

A current consisting of a closed magnetic path type magnetic core with a magnetic gap in a part, a magnetic sensing element provided in the magnetic gap, a linear IC that amplifies the induced voltage by the magnetic sensing element, and a resistor that adjusts the degree of amplification. In the detector,
Two trimming resistors are connected in series between the output terminal of the linear IC and the ground, and one is connected to the magnetic sensing element output terminal and one is connected to the linear IC input terminal through a fixed resistor between them. A current detector comprising a function of increasing and decreasing the amplification degree of the detection output by respectively increasing the resistance value of the trimming resistor.