JPS5446077A - 3 phase alternating current voltage detection circuit - Google Patents

3 phase alternating current voltage detection circuit

Info

Publication number
JPS5446077A
JPS5446077A JP11220777A JP11220777A JPS5446077A JP S5446077 A JPS5446077 A JP S5446077A JP 11220777 A JP11220777 A JP 11220777A JP 11220777 A JP11220777 A JP 11220777A JP S5446077 A JPS5446077 A JP S5446077A
Authority
JP
Japan
Prior art keywords
alternating current
detection
voltages
detection circuit
circuits
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.)
Pending
Application number
JP11220777A
Other languages
Japanese (ja)
Inventor
Osamu Matsuzaki
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11220777A priority Critical patent/JPS5446077A/en
Publication of JPS5446077A publication Critical patent/JPS5446077A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE: To supress ripples and enable detection of high accuracy to be performed with less time delay by synthesizing 3 phase alternating current voltages with a synthesis circuit by way of delta and star connection detection circuits, 3 phase full rectifying circuits and regulators respectively.
CONSTITUTION: The alternating current voltage of a 3 phase power source applied to input terminal 1 passes through delta connection type detection circuit 2 and star connection type detection circuit 3 and is full-wave rectified in 3 phase full-wave rectifying circuits 4, 5 respectively, after which it is converted to direct currents. These two direct currents are passed through regulators 6, 7 respectively and are adjusted so that the two direct current voltages of the phases of ripple voltages differing by 30° become equal, after which both voltages are synthesized in a synthesis circuit 8. Thereby, ripples may be suppressed to about 1/4 and filter circuits may be miniaturized or made unnecessary, thus high detection accuracy may be provided with less detection time delay
COPYRIGHT: (C)1979,JPO&Japio
JP11220777A 1977-09-20 1977-09-20 3 phase alternating current voltage detection circuit Pending JPS5446077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11220777A JPS5446077A (en) 1977-09-20 1977-09-20 3 phase alternating current voltage detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11220777A JPS5446077A (en) 1977-09-20 1977-09-20 3 phase alternating current voltage detection circuit

Publications (1)

Publication Number Publication Date
JPS5446077A true JPS5446077A (en) 1979-04-11

Family

ID=14580924

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11220777A Pending JPS5446077A (en) 1977-09-20 1977-09-20 3 phase alternating current voltage detection circuit

Country Status (1)

Country Link
JP (1) JPS5446077A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04131747A (en) * 1990-09-21 1992-05-06 Shinetsu Quartz Prod Co Ltd Atomic absorption spectro photometer and analyzing and measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04131747A (en) * 1990-09-21 1992-05-06 Shinetsu Quartz Prod Co Ltd Atomic absorption spectro photometer and analyzing and measuring method

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