WO1998027641A1 - Circuit de protection contre les surtensions pour convertisseur abaisseur - Google Patents

Circuit de protection contre les surtensions pour convertisseur abaisseur Download PDF

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Publication number
WO1998027641A1
WO1998027641A1 PCT/JP1997/004685 JP9704685W WO9827641A1 WO 1998027641 A1 WO1998027641 A1 WO 1998027641A1 JP 9704685 W JP9704685 W JP 9704685W WO 9827641 A1 WO9827641 A1 WO 9827641A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
circuit
scr
short
converter
Prior art date
Application number
PCT/JP1997/004685
Other languages
English (en)
Japanese (ja)
Inventor
Shinichi Kono
Hajime Makita
Original Assignee
Fanuc 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 Fanuc Ltd filed Critical Fanuc Ltd
Publication of WO1998027641A1 publication Critical patent/WO1998027641A1/fr

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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
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
    • 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
    • H02H7/125—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 rectifiers
    • H02H7/1252—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 rectifiers responsive to overvoltage in input or output, e.g. by load dump
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device

Definitions

  • the present invention relates to a protection circuit for protecting an electric device connected to a step-down converter from overvoltage.
  • the step-down converter is used to reduce the input high voltage to output a low voltage, and to supply the low voltage to electric equipment connected to the step-down converter. .
  • a drive device for a feed shaft motor that drives a feed shaft of a machine tool includes a step-down converter that converts a commercial AC three-phase power supply to a DC voltage, and a converter that converts the converted DC voltage.
  • An inverter for converting the voltage into a variable voltage and variable frequency alternating current is provided to stably control the rotation of the motor to be driven.
  • the overvoltage protection circuit includes an input connected to an AC power supply.
  • a step-down converter having a power line and an output line connected to an electric device; a voltage detection circuit for detecting a voltage of the output line; and a short-circuit circuit connected to the voltage detection circuit for short-circuiting the output line.
  • a protective relay inserted into the input line.
  • the voltage detection circuit outputs a detection signal to the short circuit when detecting a voltage equal to or higher than a predetermined voltage set as an overvoltage, and the short circuit outputs when a detection signal is input from the voltage detection circuit. Is short-circuited and the protection relay is activated to cut off the input from the AC power supply.
  • a commercial AC three-phase power supply is used as the AC power supply, and a thyristor is used to short-circuit the output line of the step-down converter.
  • FIG. 1 is a main part circuit diagram of an overvoltage protection circuit according to one embodiment of the present invention.
  • FIG. 1 shows an example in which the present invention is applied to a phase angle control type thyristor bridge step-down converter.
  • the inverter M is connected to the inverter 12 and the S converter 20, and the rotation of the motor M is controlled by the inverter 12.
  • the anode of thyristor SCR1 is connected to the force source of SCR2, and the force source of SCR1 is connected to one of the converters 20 via a diode 16 connected in the forward direction.
  • the output terminal 14 of the SCR 2 is connected to the other output terminal 15 of the connector 20.
  • the force source of SCR 3 and SCR 5 and the force source of SCR 4 and SCR 6 are The SCR 3 and SCR 5 force sources are connected to the output terminal 14 via a forward connected diode 16, and the SCR 4 and SCR 6 nodes are connected to the output terminal. Connected to 1 5.
  • the R, S, and T phases of a commercial AC three-phase power supply are connected to SCR 1 and SCR 2, SCR 3 and SCR 4 and SCR 5 via fuses 9 R and 9 S 9 T as protective relays.
  • a smoothing capacitor 8 is connected between both output terminals 14 and 15.
  • the gates of SCR 1 to SCR 6 are connected to the thyristor firing control circuit 11.
  • the configuration described above is the configuration of the phase angle control type thyristor-plunger step-down converter 20.
  • the voltage between the output terminals 14 and 15 is set between the output terminals 14 and 15.
  • the voltage detection circuit 10 to be detected is connected, the anode of the SCR 7 forming a short circuit is connected to the anode of the diode 16, and the power source of the SCR 7 is connected to the output terminal 15. ing .
  • the output of the voltage detection circuit 10 is connected to the thyristor firing circuit 11, and the thyristor firing circuit 11 is connected to the gate of the SCR 7 so that the SCR 7 can be fired.
  • the sea is squatting.
  • the configuration of the step-down converter 20 is the same as the configuration of the conventional phase angle control type thyristor-bridge type buck converter, except that the SCR 7, the voltage detection circuit 10 and the thyristor firing are used.
  • the point that the SCR 7 can be fired by the circuit 11 is different from the conventional one.
  • the output terminals 14 and 15 of the converter are connected to the input terminal of the inverter 12, and the output of the inverter 12 is connected to the terminal of each phase of the motor.
  • a three-phase AC power supply of R, S, and T phases is connected to the input terminal of the converter, and the firing circuit 11 controls the firing of SCR 1 to SCR 6 by the firing circuit 11 as in the past. 6 and rectify the phase and perform phase angle control to output a predetermined DC voltage between both terminals 14 and 15.
  • the maximum A voltage of 65 V peak value of AC 46 OV is output from the inverter and applied to the inverter 12.
  • the output voltage of the converter 20 is changed according to the present invention.
  • a set voltage for example, 400 V
  • an output signal is output to the thyristor firing circuit 11 and the thyristor firing circuit 11 outputs the signal.
  • a gate current is supplied to the gate of SCR 7 to make SCR 7 conductive and short-circuit the output terminal of converter 20.
  • the elements that short-circuit the output of the converter 20 include transistors other than SCR7, IGBTs (insulated good bipolar transistors), and GTOs (gate turns). Off thyristor). You can use a worst switching element.
  • the input of the converter is immediately cut off, so that the low-voltage inverter connected to the output terminal of the converter is used. This can prevent the destruction of equipment such as data.

Abstract

L'invention porte sur un circuit de protection contre les surtensions pour convertisseur abaisseur, de conception simple, qui protège économiquement contre les surtensions l'appareil raccordé au convertisseur. Un thyristor (7) est branché entre les bornes de sortie du convertisseur. Un circuit de détection (10) détecte la tension entre les bornes de sortie, et lorsque la tension dépasse un niveau préétabli anormal, il émet un signal. Lorsque le circuit (10) émet le signal, un circuit (11) de déclenchement rend le thyristor (7) conducteur. Il en résulte que l'un des fusibles (9R-9T) saute et que l'alimentation s'interrompt, les bornes d'entrée étant mises en court circuit par deux des thyristors conducteurs (1-6).
PCT/JP1997/004685 1996-12-18 1997-12-18 Circuit de protection contre les surtensions pour convertisseur abaisseur WO1998027641A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8353722A JPH10178779A (ja) 1996-12-18 1996-12-18 降圧形コンバータにおける過電圧保護回路
JP8/353722 1996-12-18

Publications (1)

Publication Number Publication Date
WO1998027641A1 true WO1998027641A1 (fr) 1998-06-25

Family

ID=18432783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/004685 WO1998027641A1 (fr) 1996-12-18 1997-12-18 Circuit de protection contre les surtensions pour convertisseur abaisseur

Country Status (2)

Country Link
JP (1) JPH10178779A (fr)
WO (1) WO1998027641A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6355127B1 (en) * 1998-04-27 2002-03-12 The Dow Chemical Company Cure on demand adhesives and window module with cure on demand adhesive thereon
WO2004102785A1 (fr) * 2003-05-13 2004-11-25 Newage International Limited Systeme d'alimentation electrique et generateur a aimant permanent destine a un tel systeme
EP2065993A1 (fr) * 2007-11-28 2009-06-03 Siemens Schweiz AG Système de convertisseur de tension
US8369050B2 (en) 2008-04-21 2013-02-05 Aeg Power Solutions B.V. Circuit for protecting a DC network with DC loads against overvoltage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4651832B2 (ja) * 2001-03-05 2011-03-16 富士通セミコンダクター株式会社 電源システムの過電圧保護装置
JP4851814B2 (ja) * 2006-03-01 2012-01-11 株式会社東芝 電力システム
WO2010082317A1 (fr) * 2009-01-14 2010-07-22 東芝三菱電機産業システム株式会社 Circuit de protection utilisé dans un système de génération d'énergie éolienne comprenant un générateur à double résonnance
JP6773610B2 (ja) * 2017-06-26 2020-10-21 東芝三菱電機産業システム株式会社 電圧異常検出装置
JP6513293B1 (ja) * 2017-12-15 2019-05-15 三菱電機株式会社 モータ駆動システム及びインバータ装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510343U (fr) * 1978-07-03 1980-01-23
JPH02179219A (ja) * 1988-12-28 1990-07-12 Canon Inc 電源装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510343U (fr) * 1978-07-03 1980-01-23
JPH02179219A (ja) * 1988-12-28 1990-07-12 Canon Inc 電源装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6355127B1 (en) * 1998-04-27 2002-03-12 The Dow Chemical Company Cure on demand adhesives and window module with cure on demand adhesive thereon
WO2004102785A1 (fr) * 2003-05-13 2004-11-25 Newage International Limited Systeme d'alimentation electrique et generateur a aimant permanent destine a un tel systeme
US7274547B2 (en) 2003-05-13 2007-09-25 Cummins Generator Technologies Limited Electrical power supply system and a permanent magnet generator for such a system
EP2065993A1 (fr) * 2007-11-28 2009-06-03 Siemens Schweiz AG Système de convertisseur de tension
US8369050B2 (en) 2008-04-21 2013-02-05 Aeg Power Solutions B.V. Circuit for protecting a DC network with DC loads against overvoltage
DE102008020030B4 (de) 2008-04-21 2022-05-19 Aeg Power Solutions Gmbh Schaltungsanordnung mit einem Gleichrichter und einer Schaltung zum Schutz zumindest eines an die Schaltungsanordnung anschließbaren Gleichstromnetzes mit Gleichstromverbrauchern gegen Überspannung

Also Published As

Publication number Publication date
JPH10178779A (ja) 1998-06-30

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