JPS6061670U

JPS6061670U - current-voltage converter

Info

Publication number: JPS6061670U
Application number: JP15473483U
Authority: JP
Inventors: 俊一小林
Original assignee: 東京電力株式会社; 株式会社東芝
Priority date: 1983-10-05
Filing date: 1983-10-05
Publication date: 1985-04-30

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は電子式電力量計のブロック構成図、第２図およ
び第３図は第１図に示す電力量計に用いられる補助変流
器の構成図、第４図は本考案に係る電流−電圧変換器の
第１の実施例を示す構成図、第５図は第４図の電圧−電
流変換回路の回路構成図、第６図は本考案に係る電流−
電圧変換器の第２の実施例を示す構成図である。２０・・・フィルタ回路、３０・・・電圧−電流変換回
路、ＲＢ、ＲＣ・・・抵抗、Ｃ１，Ｃ２・・・コンデン
サ、ＡＩ、　Ａ２．　Ａ３・・・演算増幅器、Ｔ、　　
Ｉ・・・変流トランス。Fig. 1 is a block diagram of an electronic watt-hour meter, Figs. 2 and 3 are block diagrams of an auxiliary current transformer used in the watt-hour meter shown in Fig. 1, and Fig. 4 shows the current according to the present invention. - A block diagram showing the first embodiment of the voltage converter, FIG. 5 is a circuit block diagram of the voltage-current conversion circuit of FIG. 4, and FIG. 6 is a current diagram according to the present invention.
It is a block diagram which shows the 2nd Example of a voltage converter. 20... Filter circuit, 30... Voltage-current conversion circuit, RB, RC... Resistor, C1, C2... Capacitor, AI, A2. A3... operational amplifier, T,
I...Current transformer.

Claims

[Scope of utility model registration request]

(1) A current transformer that converts the load current into a current of a predetermined magnitude, a voltage converter circuit that converts the current from the current transformer into a voltage value corresponding to the magnitude of the current, and a voltage from the voltage converter circuit. 1. A current-voltage converter comprising: an error correction circuit for erasing an error voltage included in a signal.

(2) The error correction circuit includes a filter circuit that extracts the error voltage from the voltage signal from the voltage conversion circuit, and a voltage that converts the error voltage from the filter circuit into a current and applies it to the input side of the voltage conversion circuit. A current-voltage converter according to claim (1), which is comprised of a current converter circuit.

(3) The error correction circuit is a negative feedback amplifier in which a filter circuit for extracting the error voltage is connected to a feedback loop inputting the voltage signal from the voltage conversion circuit, as described in claim (1) of the utility model registration. current-to-voltage converter.