JPS643568A - Current detector - Google Patents

Current detector

Info

Publication number
JPS643568A
JPS643568A JP62160264A JP16026487A JPS643568A JP S643568 A JPS643568 A JP S643568A JP 62160264 A JP62160264 A JP 62160264A JP 16026487 A JP16026487 A JP 16026487A JP S643568 A JPS643568 A JP S643568A
Authority
JP
Japan
Prior art keywords
double
frequency
detection
winding
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62160264A
Other languages
Japanese (ja)
Other versions
JPH0711541B2 (en
Inventor
Tomiyasu Sagane
Michimasa Ohara
Yoshinao Iwamoto
Shoroku Takeda
Kazuo Namito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
KDDI Corp
Asaka Co Ltd
Original Assignee
Fujitsu Ltd
Kokusai Denshin Denwa KK
Asaka Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd, Kokusai Denshin Denwa KK, Asaka Co Ltd filed Critical Fujitsu Ltd
Priority to JP62160264A priority Critical patent/JPH0711541B2/en
Publication of JPS643568A publication Critical patent/JPS643568A/en
Publication of JPH0711541B2 publication Critical patent/JPH0711541B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Amplifiers (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To execute normal detection of a DC power supply by providing a gain limiter for limiting a frequency near a double-wave frequency to a band- pass filter part of a selective amplifier. CONSTITUTION:The output voltage of a detection winding 43 increases excessively if excessive DC current flows to the input windings of troidal cores 40a, 40b and, therefore, the selective amplifier 5 which selectively amplifies the double-wave component among the same limits the frequency near the frequency of the double-wave component by the gain limiter in the band-pass filter of a twin T type, thereby suppressing the inversion of a phase error at the time of the phase detection of the double-waves from the detection winding 43 by a phase detector 6. The negative feedback to a feedback winding 44 is so prevented as not to become a positive feedback. The dynamic range of the input/output characteristics of the current detector are thereby widely maintained. The excess input at the frequency near the double-wave frequency is limited and the negative feedback operation is, therefore, maintained at all times and the normal detection of the DC current is realized.
JP62160264A 1987-06-26 1987-06-26 Current detector Expired - Fee Related JPH0711541B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62160264A JPH0711541B2 (en) 1987-06-26 1987-06-26 Current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62160264A JPH0711541B2 (en) 1987-06-26 1987-06-26 Current detector

Publications (2)

Publication Number Publication Date
JPS643568A true JPS643568A (en) 1989-01-09
JPH0711541B2 JPH0711541B2 (en) 1995-02-08

Family

ID=15711244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62160264A Expired - Fee Related JPH0711541B2 (en) 1987-06-26 1987-06-26 Current detector

Country Status (1)

Country Link
JP (1) JPH0711541B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008519269A (en) * 2004-11-05 2008-06-05 ダンフィシク アクティーゼルスカブ Detection circuit for current measurement
JP2013124875A (en) * 2011-12-13 2013-06-24 Japan Aviation Electronics Industry Ltd Current sensor
WO2014080609A1 (en) * 2012-11-21 2014-05-30 パナソニック株式会社 Current detecting device
CN110676038A (en) * 2018-07-02 2020-01-10 福迪威（上海）工业仪器技术研发有限公司 Current transformer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100968633B1 (en) * 2008-06-27 2010-07-06 김장수 Current sensor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008519269A (en) * 2004-11-05 2008-06-05 ダンフィシク アクティーゼルスカブ Detection circuit for current measurement
JP4842275B2 (en) * 2004-11-05 2011-12-21 リエゾン エレクトロニク・メカニク レム ソシエテ アノニム Detection circuit for current measurement
JP2013124875A (en) * 2011-12-13 2013-06-24 Japan Aviation Electronics Industry Ltd Current sensor
US9383392B2 (en) 2011-12-13 2016-07-05 Japan Aviation Electronic Industry, Limited Current sensor
WO2014080609A1 (en) * 2012-11-21 2014-05-30 パナソニック株式会社 Current detecting device
JP2014122879A (en) * 2012-11-21 2014-07-03 Panasonic Corp Current detector
US9841442B2 (en) 2012-11-21 2017-12-12 Panasonic Intellectual Property Management Co., Ltd. Current detecting device
CN110676038A (en) * 2018-07-02 2020-01-10 福迪威（上海）工业仪器技术研发有限公司 Current transformer
JP2021530683A (en) * 2018-07-02 2021-11-11 フルークコーポレイションFluke Corporation Current transformer

Also Published As

Publication number Publication date
JPH0711541B2 (en) 1995-02-08

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees