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WO2021190672A1 - 直流继电器 - Google Patents

直流继电器 Download PDF

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Publication number
WO2021190672A1
WO2021190672A1 PCT/CN2021/094726 CN2021094726W WO2021190672A1 WO 2021190672 A1 WO2021190672 A1 WO 2021190672A1 CN 2021094726 W CN2021094726 W CN 2021094726W WO 2021190672 A1 WO2021190672 A1 WO 2021190672A1
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WO
WIPO (PCT)
Prior art keywords
switch
control
power supply
terminal
output terminal
Prior art date
Application number
PCT/CN2021/094726
Other languages
English (en)
French (fr)
Inventor
郭桥石
刘建德
贾宝华
Original Assignee
郭桥石
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 PCT/CN2020/103480 external-priority patent/WO2021189732A1/zh
Application filed by 郭桥石 filed Critical 郭桥石
Priority to CN202180027523.3A priority Critical patent/CN115398581A/zh
Publication of WO2021190672A1 publication Critical patent/WO2021190672A1/zh

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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 relay, in particular to a DC relay suitable for DC control system applications such as locomotives, rail transit, aviation and the like.
  • DC relays are commonly used to frequently switch on and off the loads. Due to the breaking of arcs, the electrical contacts have the shortcoming of short electrical life. Traditional electronic arc extinguishing has an arc extinguishing effect. Good advantages, but there are disadvantages of large size and high cost.
  • the purpose of the present invention is to solve the problem of large volume of the existing DC relay arc extinguishing device, and provide a DC relay with an electronic arc extinguishing device with a small volume and long electrical life.
  • a DC relay includes a mechanical switch, a power supply unit, a control unit, and a control switch. It also includes a power supply terminal, a control terminal, a ground terminal, an input terminal connected to the mechanical switch and an output terminal connected to the mechanical switch.
  • the control switch is Fully-controlled semiconductor switch, the power supply unit, control switch, ground terminal, control terminal are connected with the control unit.
  • the input power of the power terminal supplies power to the power supply unit.
  • the control unit is used to detect the voltage of the output terminal, the voltage of the input power, and the mechanical switch.
  • the control signal is provided by the control unit, and the input power is connected to the output terminal through the control switch.
  • the invention is reasonable in design and has the advantages of small size and long electrical life.
  • Fig. 1 is a schematic circuit diagram of a first embodiment of a DC relay of the present invention.
  • Fig. 1 The first embodiment of the DC relay of the present invention is shown in Fig. 1:
  • a DC relay which includes a mechanical switch K (single-pole double-throw switch), a control unit A, a power supply unit B, a control switch S1, and an input terminal J1 and an output terminal J2 (J3) connected to the mechanical switch K, and a power supply terminal J4, control terminal J6, ground terminal J5, control switch S1 is a fully controlled semiconductor switch, power supply unit B, control switch S1, ground terminal J5, control terminal J6 are connected to control unit A, and the input power of power terminal J4 is the power supply unit B provides power supply.
  • Control unit A is used to detect the voltage of output terminal J2 (J3) and the voltage of input power.
  • the control signal of mechanical switch K is provided by control unit A.
  • the input power is connected to output terminal J2 (J3) through control switch S1;
  • the mechanical switch K can be a switch that does not have the breaking force under working conditions; the input power is connected to the control switch S1 through the power supply unit B; the control switch S1 provides electric pulses to the output terminal J2 (J3); the pulse width of the electric pulse is at least 20 micrometers Seconds; the mechanical switch K includes two electrical contacts; the control unit A is connected to a signal output terminal J7 for outputting the working state of the mechanical switch K.
  • the control unit A is powered on and detects the voltage of the output terminal J2 (J3) and the voltage of the input power supply of the power supply terminal J4. After the control unit A inputs the control signal, it controls the action of the mechanical switch K. When the mechanical switch K is detected The electrical contact is disconnected, and the control switch S1 is turned on to achieve the purpose of extinguishing the arc of the mechanical switch K.
  • the pulse width of the electrical pulse of the control switch is preferably between 20 microseconds and 1000 microseconds, the time interval of the electrical pulse is one time of the pulse width (1/2 duty cycle) or more, and the number of electrical pulses is at least one.
  • the total pulse width of the pulse is not less than 1 millisecond and not more than 10 milliseconds, which can effectively prevent the wrong arc-extinguishing pulse from causing the load R to act.
  • the mechanical switch K (single-pole double-throw switch) includes two electrical contacts
  • the control switch S1 consists of a fully-controlled device Q1 (transistor, field effect tube, IGBT, etc.) and an uncontrollable device D1 (diode)
  • the non-controllable device D2 is composed of a common anode (the common cathode can also be used according to the system situation, and the full control device Q1 changes the polarity together) to form a series circuit.
  • the common node of the series circuit is connected with the full control device Q1, and the series circuit
  • the two ends of the circuit are respectively connected to two electrical contacts (2, 3), and the two ends of the series circuit are respectively connected to the first output terminal J2 and the second output terminal J3.
  • the control unit A can also be connected to the display device, and at the same time provide electrical pulse signals to the load R connected to different mechanical switches K.
  • the common node of the fully-controlled semiconductor device, the uncontrollable device D1 (diode), and the uncontrollable device D2 can be connected to one Diode, the other end of the diode is grounded to suppress the reverse electromotive force of the load R.
  • This embodiment is convenient for product certification. Through the high withstand voltage characteristics of the switch input end and output end in the disconnected state, the arc extinguishing is realized for the multiple switches connected in series at the input end, and the line inductance connected to the input end is effectively suppressed. Impact on the overvoltage of the arc extinguishing control switch.
  • the patented relay of the present invention has the advantages of small size and long electrical life.

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

Abstract

本发明涉及一种直流继电器，其包括一机械开关、一电源单元、控制单元、控制开关、电源端子、控制端子、接地端子、与机械开关连接的输入端子和机械开关连接的输出端子，控制开关为全控型半导体开关，电源单元、控制开关、地端子、控制端子与控制单元连接，电源端子的输入电源为电源单元供电，控制单元用于检测输出端子的电压、输入电源的电压，机械开关的控制信号由控制单元提供，输入电源通过控制开关与输出端子连接。具有体积小、电寿命长的优点。

Description

直流继电器 技术领域
本发明涉及一种直流继电器，特别是一种适合于机车、轨道交通、航空等直流控制系统应用的直流继电器。
背景技术
目前在机车、轨道交通、航空等直流电控系统中，普遍使用直流继电器对各负载进行频繁接通和分断控制，由于分断电弧导致电接点存在电寿命短的缺点，传统电子灭弧具有灭弧效果好的优点，但存在体积大、成本高的缺点。
发明内容
本发明的目的在于解决现有直流继电器灭弧装置体积大存在的问题，提供一种带有电子灭弧装置的体积小、电寿命长的直流继电器。
实现本发明的目的是通过以下技术方案来达到的：
一种直流继电器，其包括一机械开关、一电源单元、控制单元、控制开关，还包括电源端子、控制端子、接地端子、与机械开关连接的输入端子和机械开关连接的输出端子，控制开关为全控型半导体开关，电源单元、控制开关、地端子、控制端子与控制单元连接，电源端子的输入电源为电源单元供电，控制单元用于检测输出端子的电压、输入电源的电压，机械开关的控制信号由控制单元提供，输入电源通过控制开关与输出端子连接。
工作原理：在机械开关分断过程中，在机械开关触点间产生电弧时，输入电源通过控制开关、输出端子，对与输出端子连接的负载供电，实现对机械开关灭弧。
本发明设计合理，具有体积小、电寿命长的优点。
附图说明
图1是本发明直流继电器实施例一电路原理图。
具体实施方式
本发明直流继电器的实施例一，如图1所示：
一种直流继电器，其包括机械开关K(单刀双掷开关)、控制单元A、电源单元B、控制开关S1，还包括与机械开关K连接的输入端子J1和输出端子J2(J3)、电源端子J4、控制端子J6、接地端子J5，控制开关S1为全控型半导体开关，电源单元B、控制开关S1、地端子J5、控制端子J6与控制单元A连接，电源端子J4的输入电源为电源单元B供电，控制单元A用于检测输出端子J2(J3)的电压、输入电源的电压，机械开关K的控制信号由 控制单元A提供，输入电源通过控制开关S1与输出端子J2(J3)连接；机械开关K可采用一不具备工作条件下分断力的开关；输入电源通过电源单元B与控制开关S1连接；控制开关S1提供电脉冲给输出端子J2(J3)；电脉冲脉宽至少大于20微秒；机械开关K包括两个电接点；控制单元A连接一信号输出端子J7，用于输出机械开关K工作状态。
工作原理：控制单元A上电，检测输出端子J2(J3)的电压、电源端子J4的输入电源的电压，控制单元A输入控制信号后，控制机械开关K动作，当检测到机械开关K的的电接点断开，控制控制开关S1导通，实现对机械开关K灭弧的目的。
控制开关电脉冲脉宽优选为：20微秒至1000微秒之间，电脉冲的时间间隔为脉宽的一倍(1/2占空比)或以上，电脉冲数量为至少一个以上，电脉冲的脉宽总和不小于1毫秒不大于10毫秒，可以有效防止错误灭弧脉冲引起负载R动作。
以上实施例，机械开关K(单刀双掷开关)包括两个电接点，控制开关S1由全控型器件Q1(三极管，也可以采用场效应管，IGBT等)、不可控型器件D1(二极管)、不可控型器件D2组成，共阳(根据系统情况也可采用共阴，全控型器件Q1一同改变极性)组成一串联电路，串联电路的共同节点与全控型器件Q1连接，串联电路的两端分别与两个电接点(2，3)连接，串联电路的两端分别与第一输出端子J2、第二输出端子J3连接。
控制单元A也可连接显示器件，同时给不同机械开关K连接的负载R同时提供电脉冲信号，全控型半导体器件，不可控型器件D1(二极管)、不可控型器件D2共同节点可连接一二极管，该二极管的另一端接地，用于抑制负载R的反向电动势。
本实施例，方便产品认证，通过符合安全标准，开关的输入端，输出端断开状态下的高耐压特性，对输入端串联的多路开关实现灭弧，有效抑制输入端连接的线路电感对灭弧控制开关的过电压影响。
综上所述，本发明专利继电器具有体积小、电寿命长的优点。

Claims (10)

  1. 一种直流继电器，其特征是：其包括一机械开关、一控制单元、一电源单元、控制开关，还包括电源端子、控制端子、接地端子、与所述机械开关连接的输入端子和所述机械开关连接的输出端子，所述控制开关为全控型半导体开关，所述电源单元、所述控制开关、所述地端子、所述控制端子与所述控制单元连接，所述电源端子的输入电源为所述电源单元供电，所述控制单元用于检测所述输出端子的电压、所述输入电源的电压，所述机械开关的控制信号由所述控制单元提供，所述输入电源通过所述控制开关与所述输出端子连接。
  2. 根据权利要求1所述的直流继电器，其特征是：所述机械开关为一不具备工作条件下分断力的开关。
  3. 根据权利要求1所述的直流继电器，其特征是：所述输入电源通过所述电源单元与所述控制开关连接。
  4. 根据权利要求1所述的直流继电器，其特征是：所述控制开关提供电脉冲给所述输出端子。
  5. 根据权利要求4所述的直流继电器，其特征是：所述电脉冲脉宽为20微秒至1000微秒之间。所述电脉冲的时间间隔为脉宽的一倍或以上。
  6. 根据权利要求5所述的直流继电器，其特征是：所述电脉冲数量为至少一个以上，所述电脉冲的脉宽总和不小于1毫秒不大于10毫秒。
  7. 根据权利要求1所述的直流继电器，其特征是：所述机械开关至少包括两个电接点。
  8. 根据权利要求7所述的直流继电器，其特征是：所述机械开关至少包括两个电接点，所述控制开关由一全控型器件、至少二不可控型器件组成，所述不可控型器件共阴或共阳组成一串联电路，所述串联电路的共同节点与所述全控型器件连接，所述串联电路的两端分别与两个所述电接点连接。
  9. 根据权利要求8所述的直流继电器，其特征是：所述机械开关为单刀双掷开关，所述输出端子包括第一输出端子、第二输出端子，所述串联电路的两端分别与所述第一输出端子、所述第二输出端子连接。
  10. 根据权利要求1所述的直流继电器，其特征是：所述控制单元连接一信号输出端子，用于输出所述机械开关工作状态。
PCT/CN2021/094726 2020-05-20 2021-05-19 直流继电器 WO2021190672A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
CN202010432236 2020-05-20
CN202010432236.8 2020-05-20
CN202010445206.0 2020-05-23
CN202010445206 2020-05-23
CNPCT/CN2020/103480 2020-07-22
PCT/CN2020/103480 WO2021189732A1 (zh) 2020-04-03 2020-07-22 消弧装置
CN202010764134 2020-08-01
CN202010764134.6 2020-08-01

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CN105185623A (zh) * 2014-07-30 2015-12-23 广州市金矢电子有限公司 直流电子灭弧装置
CN108962647A (zh) * 2017-07-24 2018-12-07 广州市金矢电子有限公司 直流灭弧装置

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JP6327991B2 (ja) * 2014-07-22 2018-05-23 富士電機株式会社 開閉器
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US20110222191A1 (en) * 2010-03-12 2011-09-15 Reinhold Henke Two Terminal Arc Suppressor
CN105185623A (zh) * 2014-07-30 2015-12-23 广州市金矢电子有限公司 直流电子灭弧装置
CN108962647A (zh) * 2017-07-24 2018-12-07 广州市金矢电子有限公司 直流灭弧装置

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