WO2019052458A1 - Appareil d'extinction d'arc à courant continu - Google Patents

Appareil d'extinction d'arc à courant continu Download PDF

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Publication number
WO2019052458A1
WO2019052458A1 PCT/CN2018/105181 CN2018105181W WO2019052458A1 WO 2019052458 A1 WO2019052458 A1 WO 2019052458A1 CN 2018105181 W CN2018105181 W CN 2018105181W WO 2019052458 A1 WO2019052458 A1 WO 2019052458A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
thyristor
mechanical switch
arc extinguishing
arc
Prior art date
Application number
PCT/CN2018/105181
Other languages
English (en)
Chinese (zh)
Inventor
郭桥石
Original Assignee
广州市金矢电子有限公司
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
Priority claimed from CN201810792433.3A external-priority patent/CN108962647B/zh
Application filed by 广州市金矢电子有限公司 filed Critical 广州市金矢电子有限公司
Priority to CN201880055327.5A priority Critical patent/CN111527575B/zh
Publication of WO2019052458A1 publication Critical patent/WO2019052458A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts

Definitions

  • the invention relates to a DC arc extinguishing device, in particular to a DC arc extinguishing device suitable for rapidly extinguishing a mechanical contact such as a mechanical switch, and can also be used for other breakpoints (such as a fuse of a fuse, a plug and a socket) The arc of the breakpoint, the wire breakpoint.
  • the object of the present invention is to solve the problem that the electrical life of the mechanical switch in the prior DC electric control system is short, and to provide a DC arc extinguishing device with good isolation, good arc extinguishing effect and simple circuit.
  • a DC arc extinguishing device the first mechanical switch required to extinguish the arc is connected in series with the first load, and includes a first thyristor, a first capacitor, a second capacitor; a second capacitor, a trigger pole of the first thyristor, and a first thyristor
  • the cathode constitutes a first series circuit, and the first series circuit is connected in parallel with the first mechanical switch.
  • the first capacitor forms a discharge circuit through the first thyristor and the first load, and is used for breaking the first mechanical switch. arc.
  • the invention has reasonable design and good advantages of good isolation, good arc extinguishing effect and simple circuit.
  • Embodiment 1 is a circuit schematic diagram of Embodiment 1 of a DC arc extinguishing device of the present invention.
  • Embodiment 1 of the DC arc extinguishing device of the present invention is as shown in FIG. 1:
  • a DC arc extinguishing device the first mechanical switch K1 required to extinguish the arc is connected in series with the first load R1, and includes a first thyristor SCR1, a first capacitor C1, a second capacitor C2; a second capacitor C2, and a first thyristor SCR1
  • the trigger pole, the cathode of the first thyristor SCR1 constitutes a first series circuit, the first series circuit is connected in parallel with the first mechanical switch K1;
  • the second mechanical switch K2 required to extinguish the arc is connected in series with the second load R2, and further includes a third capacitor C3, the second thyristor SCR2, the third capacitor C3, the trigger pole of the second thyristor SCR2, the cathode of the second thyristor SCR2 constitute a second series circuit, the second series circuit is connected in parallel with the second mechanical switch K2, and the second mechanical switch K2 is disconnected.
  • the first capacitor C1 forms a discharge loop through the second thyristor SCR2 and the second load R2 for the second mechanical switch K2 to break the arc extinguishing; further includes a control unit A for detecting the voltage of the first capacitor C1 After the first capacitor C1 is discharged through the first thyristor SCR1 until the first thyristor SCR1 is turned off, the control unit A is turned on, and the charging power source (input from the terminals P1 and P2) charges the first capacitor C1 through the control unit A.
  • Control unit A It comprises a voltage detecting pulse signal generator B, a first transistor Q1 (which is a triode, or a FET, or a fully controlled device such as an IGBT), a resistor R3, and a voltage detecting pulse signal generator B.
  • the voltage input terminal is connected to the first capacitor C1, and the output signal of the voltage detecting pulse signal generator B is connected to the control terminal of the first transistor Q1.
  • the charging power source is connected to the first capacitor C1 through the first transistor Q1, and the charging power source passes through the resistor R3 ( The current through the resistor R3 is smaller than the first thyristor SCR1 and the second thyristor SCR2 minimum holding current) is connected to the first capacitor C1; the operating power of the voltage detecting pulse signal generator B is provided by the charging power source (which may also be provided by an external power source),
  • the circuit of the voltage detecting pulse signal generator B can be composed of an integrated circuit such as 555 and related peripheral components.
  • the resistor R3 is beneficial for keeping the first capacitor C1 in a fully charged state, and compensating for the first capacitor C1 when the mechanical switch is in the closed bounce and arc extinguishing.
  • voltage detection pulse signal generator B can also use a built-in microcontroller circuit to facilitate the first capacitor C1
  • the AD voltage is collected, and the capacity of the first capacitor C1, the load characteristics of the first load R1 and the second load R2 can be detected by the voltage change of the first capacitor C1, and the first thyristor SCR1, the second thyristor SCR2, and the first can be detected.
  • the voltage detecting pulse signal generator B can also detect the voltage of the charging power source in the operating state (off, on, and breakdown states) of the transistor Q1.
  • the second capacitor C2 is discharged through the first mechanical switch K1.
  • the charging current of the second capacitor C2 triggers the first thyristor SCR1 to be turned on, and the first capacitor C1 passes through the first thyristor SCR1.
  • the first load R1 forms a discharge circuit, and the voltage between the two ends of the first load R1 rises, and the electric field strength between the contacts of the first mechanical switch K1 rapidly decreases, so as to achieve the purpose of bounce and extinguish the arc of the first mechanical switch K1, A capacitor C1 loses charge during the arc-extinguishing process of the first mechanical switch K1, and the charging power source maintains the charging state of the first capacitor C1 through the resistor R3, which satisfies the need to provide sufficient arc-extinguishing charge for the first mechanical switch K1 to break the arc extinguishing.
  • the voltage detecting pulse signal generator B uses a circuit with a built-in microcontroller, the resistor R3 can be omitted. According to the data collected by the voltage AD of the first capacitor C1, the voltage detecting pulse signal generator B outputs a narrow pulse signal to control the first transistor. Q1 is turned on, and the first capacitor C1 is recharged;
  • the working principle of the arc extinguishing process of the second mechanical switch K2 is the same as that of the first mechanical switch K1, and will not be repeated here.
  • the charging signal connected to the first capacitor C1 is a pulse charging signal.
  • the control unit A When the control unit A is omitted, the first capacitor C1 needs to be connected to the pulse charging signal;
  • a semiconductor device such as a Zener diode or a Zener diode having a turn-on voltage greater than 5 volts may be connected in series between the second capacitor C2 and the third capacitor C3.
  • a semiconductor device such as a Zener diode or a Zener diode
  • the first capacitor C1 starts to discharge, and the voltage of the charging power source of the first capacitor C1 can be simultaneously or separately increased, and the charging power source is charged.
  • the voltage value is in the range of 1 to 1.5 times (more than 1 time less than 1.5 times) of the main circuit voltage of the first mechanical switch K1 (second mechanical switch K2), when the contacts of the first mechanical switch K1 (second mechanical switch K2)
  • the first thyristor SCR1 second thyristor SCR2
  • a reverse voltage greater than 5 volts
  • the two mechanical switches K2) charged particles between the contacts, quickly adsorbed to the contacts, to achieve rapid arc extinguishing, to overcome the risk of arc re-ignition.
  • the control unit A may increase the discharge circuit to the first capacitor C1, in the first thyristor SCR1 or During the conduction of the second thyristor SCR2, the first capacitor C1 is discharged, so that the first thyristor SCR1 or the second thyristor SCR2 is quickly turned off.
  • the circuit shown in Figure 1 is a working principle diagram. In practical applications, technical components can be added, such as series resistor current limiting in the second capacitor C2 and the third capacitor C3, and the trigger circuits of the first thyristor SCR1 and the second thyristor SCR2.
  • the first thyristor SCR1 and the second thyristor SCR2 are unidirectional thyristors, and a bidirectional thyristor may also be used.
  • the cathode defined in the present invention may also be represented as a bidirectional thyristor equivalent electrode.
  • the mechanical switch (the first mechanical switch and the second mechanical switch) is a contactor (relay).
  • any mechanical breakpoint as an arc extinguishing target can also be defined as a mechanical switch, such as a fuse body and a connector. Wait.
  • the present invention has the following advantages:
  • the first thyristor is triggered by the second capacitive coupling, and the first capacitor stores energy to extinguish the arc.
  • the DC arc extinguishing application there is almost no leakage current of the main circuit, and the electrical isolation is good.
  • the control unit only needs to detect the voltage across the first capacitor to determine the working state of the first thyristor and the second thyristor, control the charging of the first capacitor, and provide a synchronization signal without a mechanical switch, and can have no control coil
  • the manual control switch, the travel switch and other mechanical switches perform arc extinguishing, and the application range is wide; when the multi-way mechanical switch is extinguished, the first capacitor and the control unit can be multiplexed, and the utility model has the advantages of simple circuit, low cost and fast response speed. .
  • the voltage breaking force and the current breaking force of the mechanical switch can be greatly improved, and the low cost, low current and low voltage breaking force and small volume mechanical switch can be used instead of high cost and high current. High voltage breaking force, large volume mechanical switch.
  • the first capacitor discharges the first load through the first thyristor to extinguish the arc.
  • the thyristor has the advantages of large overload capability, short conduction time, low cost, and no zero-breaking current.
  • the first thyristor When the voltage fluctuates in the state after the first mechanical opening and closing, the first thyristor is not turned on, the first thyristor has no temperature rise, and the first capacitor has a long electrical life.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

La présente invention concerne un appareil d'extinction d'arc à courant continu, en particulier un appareil d'extinction d'arc à courant continu approprié pour réaliser une extinction d'arc sur des contacts mécaniques tels qu'un commutateur mécanique. Un premier commutateur mécanique nécessitant une extinction d'arc est connecté à une première charge en série, et l'appareil comprend un premier thyristor, un premier condensateur et un second condensateur, le second condensateur, une électrode de déclenchement du premier thyristor et une cathode du premier thyristor formant un premier circuit série, le premier circuit série est connecté au premier commutateur mécanique en parallèle, et pendant la rupture du premier commutateur mécanique, le premier condensateur forme, au moyen du premier thyristor et de la première charge, une boucle de décharge utilisée pour rompre et éteindre l'arc par le premier commutateur mécanique. La présente invention est de conception raisonnable, et présente les avantages d'une bonne isolation, d'un excellent effet d'extinction d'arc et d'un circuit simple.
PCT/CN2018/105181 2017-09-14 2018-09-12 Appareil d'extinction d'arc à courant continu WO2019052458A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880055327.5A CN111527575B (zh) 2017-09-14 2018-09-12 直流灭弧装置

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN201710828462 2017-09-14
CN201710828462.6 2017-09-14
CN201810518236 2018-05-27
CN201810518236.2 2018-05-27
CN201810792433.3 2018-07-18
CN201810792433.3A CN108962647B (zh) 2017-07-24 2018-07-18 直流灭弧装置
CN201811047117.X 2018-09-08
CN201811047117 2018-09-08

Publications (1)

Publication Number Publication Date
WO2019052458A1 true WO2019052458A1 (fr) 2019-03-21

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Application Number Title Priority Date Filing Date
PCT/CN2018/105181 WO2019052458A1 (fr) 2017-09-14 2018-09-12 Appareil d'extinction d'arc à courant continu

Country Status (2)

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CN (1) CN111527575B (fr)
WO (1) WO2019052458A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114864336A (zh) * 2022-04-29 2022-08-05 河北工业大学 一种基于自然换流的无弧继电器及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100007997A1 (en) * 2008-07-11 2010-01-14 Goodwell Electric Corp. Electronic arc extinguishing device
CN105428118A (zh) * 2014-12-11 2016-03-23 广州市金矢电子有限公司 灭弧装置及无弧开关
CN106783297A (zh) * 2016-01-24 2017-05-31 广州市金矢电子有限公司 直流灭弧功率器件驱动装置及灭弧装置

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CN2197739Y (zh) * 1993-08-27 1995-05-17 惠州市夏里巴实业公司 无电弧接触器
CN101587786B (zh) * 2009-06-17 2011-07-27 沈永年 一种开关消弧电路及其控制方法
CN104392859B (zh) * 2014-03-07 2017-04-05 广州市金矢电子有限公司 电子灭弧装置
CN206432170U (zh) * 2016-01-24 2017-08-22 广州市金矢电子有限公司 灭弧功率器件驱动装置及灭弧装置
AU2017209635B2 (en) * 2016-01-24 2019-05-02 Qiaoshi Guo Arc-extinguishing power device driving apparatus and arc-extinguishing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100007997A1 (en) * 2008-07-11 2010-01-14 Goodwell Electric Corp. Electronic arc extinguishing device
CN105428118A (zh) * 2014-12-11 2016-03-23 广州市金矢电子有限公司 灭弧装置及无弧开关
CN106783297A (zh) * 2016-01-24 2017-05-31 广州市金矢电子有限公司 直流灭弧功率器件驱动装置及灭弧装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114864336A (zh) * 2022-04-29 2022-08-05 河北工业大学 一种基于自然换流的无弧继电器及其控制方法

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CN111527575A (zh) 2020-08-11
CN111527575B (zh) 2023-01-10

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