JPS57132221A - Bipolar constant current device - Google Patents

Bipolar constant current device

Info

Publication number
JPS57132221A
JPS57132221A JP1840681A JP1840681A JPS57132221A JP S57132221 A JPS57132221 A JP S57132221A JP 1840681 A JP1840681 A JP 1840681A JP 1840681 A JP1840681 A JP 1840681A JP S57132221 A JPS57132221 A JP S57132221A
Authority
JP
Japan
Prior art keywords
constant current
terminal
diodes
circuits
diode
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
JP1840681A
Other languages
Japanese (ja)
Other versions
JPH0227683B2 (en
Inventor
Tadashi Azegami
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP1840681A priority Critical patent/JPH0227683B2/en
Priority to US06/275,510 priority patent/US4387601A/en
Priority to DE19813125664 priority patent/DE3125664A1/en
Priority to FR8112976A priority patent/FR2486232B1/en
Publication of JPS57132221A publication Critical patent/JPS57132221A/en
Publication of JPH0227683B2 publication Critical patent/JPH0227683B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • G05F1/16—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To prevent the generation of a pulse current when current directions are changed by connecting two constant current circuits between one couple of terminals with the opposite polarities and by connecting diodes across those constant current circuits, respectively. CONSTITUTION:Constant current circuits 15 and 16 are connected between terminals 12 and 14 in series with the opposite polarities, and in parallel to the circuits 15 and 16, diodes 21 and 22 are so connected that the constant current directions of the constant current circuits are the forward directins of the diodes. Further, the diodes 21 and 22 have a forward barrier voltage lower than that when the constant current circuits 15 and 16 operate as forward diodes, and also have short recovery time. For example, when the terminal 12 is negative and the terminal is positive, the circuit 15 never turns on as a diode and a current flows from the terminal 14 to the terminal 12 through the circuit 16 and diode 21. When the terminal 12 is positive and the terminal 14 is negative, on the other hand, a current flows from the circuit 15 through the diode 22; when current directions are changed, the charge storage amount of the diode 21 is less and its recovery time is short, suppressing the generation of a pulse current.
JP1840681A 1980-07-01 1981-02-09 RYOKYOKUSEIGATATEIDENRYUSOCHI Expired - Lifetime JPH0227683B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1840681A JPH0227683B2 (en) 1981-02-09 1981-02-09 RYOKYOKUSEIGATATEIDENRYUSOCHI
US06/275,510 US4387601A (en) 1980-07-01 1981-06-19 Capacitance type displacement conversion device
DE19813125664 DE3125664A1 (en) 1980-07-01 1981-06-30 ADJUSTMENT DEVICE
FR8112976A FR2486232B1 (en) 1980-07-01 1981-07-01 CAPACITIVE-TYPE DISPLACEMENT CONVERSION DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1840681A JPH0227683B2 (en) 1981-02-09 1981-02-09 RYOKYOKUSEIGATATEIDENRYUSOCHI

Publications (2)

Publication Number Publication Date
JPS57132221A true JPS57132221A (en) 1982-08-16
JPH0227683B2 JPH0227683B2 (en) 1990-06-19

Family

ID=11970781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1840681A Expired - Lifetime JPH0227683B2 (en) 1980-07-01 1981-02-09 RYOKYOKUSEIGATATEIDENRYUSOCHI

Country Status (1)

Country Link
JP (1) JPH0227683B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010263628A (en) * 2009-05-07 2010-11-18 Lighting Device Technologies Corp Bi-direction constant current device and led lamp employing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010263628A (en) * 2009-05-07 2010-11-18 Lighting Device Technologies Corp Bi-direction constant current device and led lamp employing the same

Also Published As

Publication number Publication date
JPH0227683B2 (en) 1990-06-19

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