FR2409625A1 - Sampling circuit monitoring voltage across smoothing capacitor - is connected at static inverter DC input to produce switching signal - Google Patents

Sampling circuit monitoring voltage across smoothing capacitor - is connected at static inverter DC input to produce switching signal

Info

Publication number
FR2409625A1
FR2409625A1 FR7832289A FR7832289A FR2409625A1 FR 2409625 A1 FR2409625 A1 FR 2409625A1 FR 7832289 A FR7832289 A FR 7832289A FR 7832289 A FR7832289 A FR 7832289A FR 2409625 A1 FR2409625 A1 FR 2409625A1
Authority
FR
France
Prior art keywords
smoothing capacitor
input
sampling circuit
switching signal
static inverter
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
FR7832289A
Other languages
French (fr)
Other versions
FR2409625B3 (en
Inventor
Ekkehart Von Renesse
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2409625A1 publication Critical patent/FR2409625A1/en
Application granted granted Critical
Publication of FR2409625B3 publication Critical patent/FR2409625B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the input circuit, e.g. transients in the DC input

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)

Abstract

The sampling circuit, for e.g. locomotives, samples the voltage across the smoothing capacitor connected to a static inverter DC input. The smoothing capacitor(1) is shunted by the series combination of a discharge registor(6), a zener diode(7) and a variable resistor(8). A voltage divider(10, 11) is connected across the zener diode and variable resistor and its tapping is connected to the non-inverting input of an operational amplifier(9) whose inverting input is connected to the junction between the zener diode and the variable resistor. The operational amplifier drives the LED in an optoelectronic coupler and acts as a switch with hysteresis the phototransistor output voltage is the switch's output.
FR7832289A 1977-11-19 1978-11-15 Sampling circuit monitoring voltage across smoothing capacitor - is connected at static inverter DC input to produce switching signal Granted FR2409625A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2752158 1977-11-19

Publications (2)

Publication Number Publication Date
FR2409625A1 true FR2409625A1 (en) 1979-06-15
FR2409625B3 FR2409625B3 (en) 1981-08-14

Family

ID=6024353

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7832289A Granted FR2409625A1 (en) 1977-11-19 1978-11-15 Sampling circuit monitoring voltage across smoothing capacitor - is connected at static inverter DC input to produce switching signal

Country Status (3)

Country Link
BE (1) BE872056A (en)
FR (1) FR2409625A1 (en)
IT (1) IT1102332B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033368A2 (en) * 1980-01-31 1981-08-12 ANT Nachrichtentechnik GmbH Method of protecting a D.C. converter against excessive voltages
WO1994011747A1 (en) * 1992-11-06 1994-05-26 General Electric Company Auto-self test of ac motor system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033368A2 (en) * 1980-01-31 1981-08-12 ANT Nachrichtentechnik GmbH Method of protecting a D.C. converter against excessive voltages
EP0033368A3 (en) * 1980-01-31 1981-10-21 Ant Nachrichtentechnik Gmbh Method of protecting a d.c. converter against excessive voltages
US5363039A (en) * 1990-12-20 1994-11-08 General Electric Company Auto self test of AC motor system
WO1994011747A1 (en) * 1992-11-06 1994-05-26 General Electric Company Auto-self test of ac motor system

Also Published As

Publication number Publication date
FR2409625B3 (en) 1981-08-14
BE872056A (en) 1979-03-16
IT7829868A0 (en) 1978-11-16
IT1102332B (en) 1985-10-07

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Legal Events

Date Code Title Description
ST Notification of lapse