JPS5722383A - Detecting circuit for open-phase voltage - Google Patents

Detecting circuit for open-phase voltage

Info

Publication number
JPS5722383A
JPS5722383A JP9725580A JP9725580A JPS5722383A JP S5722383 A JPS5722383 A JP S5722383A JP 9725580 A JP9725580 A JP 9725580A JP 9725580 A JP9725580 A JP 9725580A JP S5722383 A JPS5722383 A JP S5722383A
Authority
JP
Japan
Prior art keywords
voltage
open
comparator
resistors
circuit
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
JP9725580A
Other languages
Japanese (ja)
Other versions
JPS6332154B2 (en
Inventor
Junji Matsumura
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9725580A priority Critical patent/JPS5722383A/en
Publication of JPS5722383A publication Critical patent/JPS5722383A/en
Publication of JPS6332154B2 publication Critical patent/JPS6332154B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Power Conversion In General (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To enhance stability and reliability of a device by a method wherein a open-phase voltage detecting circuit having simple circuit constitution using a resistor, a full-wave rectifying circuit, step-down resistors, a capacitor, a comparator, is used. CONSTITUTION:When respective phases R, S, T of the device is normal, the wave- form of the voltage rectified in the full-wave rectifying circuit 1 has a little lipple components, the voltage of noncut part being DC component thereof cut by a voltage regulating element DZ charges the capacitor C through the resistor R3, and the voltage thereof is divided by the resistors R1, R2. Moreover the voltage of the capacitor C is divided by the resistors R4, R5. The voltage at both ends of the resistors R2, R5 are compared by the comparator 2. When the respective phases of the voltage is normal, no output is generated from the comparator 2, and a switching circuit 3 does not operate. While when open-phase is generated, the lipple components in the rectified wave-form of the full-wave rectifying circuit 1 increase, and a compared output is generated from the comparator 2. Accordingly the switching circuit 3 operates to inform open-phase by a relay RY.
JP9725580A 1980-07-15 1980-07-15 Detecting circuit for open-phase voltage Granted JPS5722383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9725580A JPS5722383A (en) 1980-07-15 1980-07-15 Detecting circuit for open-phase voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9725580A JPS5722383A (en) 1980-07-15 1980-07-15 Detecting circuit for open-phase voltage

Publications (2)

Publication Number Publication Date
JPS5722383A true JPS5722383A (en) 1982-02-05
JPS6332154B2 JPS6332154B2 (en) 1988-06-28

Family

ID=14187447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9725580A Granted JPS5722383A (en) 1980-07-15 1980-07-15 Detecting circuit for open-phase voltage

Country Status (1)

Country Link
JP (1) JPS5722383A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6180226A (en) * 1984-09-28 1986-04-23 Toshiba Corp Active matrix driving device
JPH01231616A (en) * 1988-03-11 1989-09-14 Hitachi Ltd Line condition detector and electric device using the same
JPH04156222A (en) * 1990-10-17 1992-05-28 Daikin Ind Ltd Inverter device
US5359206A (en) * 1989-08-14 1994-10-25 Hitachi, Ltd. Thin film transistor substrate, liquid crystal display panel and liquid crystal display equipment
JP2019158858A (en) * 2018-03-07 2019-09-19 日新電機株式会社 Voltage abnormality detection device and voltage abnormality detection method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5060078U (en) * 1973-09-29 1975-06-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5060078U (en) * 1973-09-29 1975-06-03

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6180226A (en) * 1984-09-28 1986-04-23 Toshiba Corp Active matrix driving device
JPH01231616A (en) * 1988-03-11 1989-09-14 Hitachi Ltd Line condition detector and electric device using the same
US5359206A (en) * 1989-08-14 1994-10-25 Hitachi, Ltd. Thin film transistor substrate, liquid crystal display panel and liquid crystal display equipment
US5672523A (en) * 1989-08-14 1997-09-30 Hitachi, Ltd. Thin film transistor substrate, manufacturing method thereof, liquid crystal display panel and liquid crystal display equipment
US5889573A (en) * 1989-08-14 1999-03-30 Hitachi, Ltd. Thin film transistor substrate, manufacturing method thereof, liquid crystal display panel and liquid crystal display equipment
JPH04156222A (en) * 1990-10-17 1992-05-28 Daikin Ind Ltd Inverter device
JP2019158858A (en) * 2018-03-07 2019-09-19 日新電機株式会社 Voltage abnormality detection device and voltage abnormality detection method

Also Published As

Publication number Publication date
JPS6332154B2 (en) 1988-06-28

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