CN103346552B - A kind of reverse-connection preventing circuit - Google Patents
A kind of reverse-connection preventing circuit Download PDFInfo
- Publication number
- CN103346552B CN103346552B CN201310255734.XA CN201310255734A CN103346552B CN 103346552 B CN103346552 B CN 103346552B CN 201310255734 A CN201310255734 A CN 201310255734A CN 103346552 B CN103346552 B CN 103346552B
- Authority
- CN
- China
- Prior art keywords
- pin
- double
- power supply
- pins
- pole
- 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.)
- Expired - Fee Related
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本发明涉及一种防反接电路，它包括：双刀双掷继电器K、保护二极管D1和反向二极管D2；其中双刀双掷继电器K的管脚K1与电源输入端Ⅰ相连接，管脚K4与电源输入端Ⅱ相连接，管脚K7与反向二极管D2的正极相连，管脚K8与电源输入端Ⅱ相连接；反向二极管D2的负极与电源输入端Ⅰ相连接；保护二极管D1的负极与双刀双掷继电器K的管脚K7相连接，保护二极管D1的正极与双刀双掷继电器K的管脚K8相连接；双刀双掷继电器K的管脚K2和管脚K6均与电源正输出端相连接；双刀双掷继电器K的管脚K3和管脚K5均与电源负输出端相连接。使用时，无论电源如何接入输入端，电路都可以通过转换保证输出电压的极性，即保证输出端的正负极性不随电源的正反接而改变。
The invention relates to an anti-reverse connection circuit, which includes: a double-pole double-throw relay K, a protection diode D1 and a reverse diode D2; wherein the pin K1 of the double-pole double-throw relay K is connected to the power input terminal I, and the pin K4 is connected to the power input terminal II, the pin K7 is connected to the anode of the reverse diode D2, and the pin K8 is connected to the power input terminal II; the negative pole of the reverse diode D2 is connected to the power input terminal I; the protection diode D1 The negative pole is connected to the pin K7 of the double-pole double-throw relay K, the positive pole of the protection diode D1 is connected to the pin K8 of the double-pole double-throw relay K; the pin K2 and the pin K6 of the double-pole double-throw relay K are both connected to The positive output terminal of the power supply is connected; the pin K3 and the pin K5 of the double-pole double-throw relay K are both connected with the negative output terminal of the power supply. When in use, no matter how the power supply is connected to the input terminal, the circuit can ensure the polarity of the output voltage through conversion, that is, to ensure that the positive and negative polarity of the output terminal does not change with the positive and negative connection of the power supply.
Description
技术领域 technical field
本发明属于电路保护技术领域，涉及一种防反接电路。 The invention belongs to the technical field of circuit protection and relates to an anti-reverse connection circuit.
背景技术 Background technique
在所有的电子设备或者产品的开发过程中，电源是必不可少的组成部分，也是使用频率最高的成分，尤其在开发与测试阶段，频繁的通断电源是必不可少的过程。在频繁的连接电源和拆除电源的过程中，不可避免的会出现电源线反接的情况，即误将电源线的正负极接反，如果电路没有足够的保护措施，就会烧毁后级电路或电源，或者出现电源与后级电路同时烧毁，造成器件与时间的浪费，延长开发时间，提高开发成本，有时候甚至会造成安全隐患。 In the development process of all electronic equipment or products, the power supply is an essential component, and it is also the most frequently used component. Especially in the development and testing stage, frequent power on and off is an essential process. In the process of frequently connecting and removing the power supply, it is inevitable that the power line will be reversed, that is, the positive and negative poles of the power line will be reversed by mistake. If the circuit does not have sufficient protection measures, the subsequent circuit will be burned Or the power supply, or the power supply and the subsequent circuit are burned at the same time, resulting in waste of devices and time, prolonging development time, increasing development costs, and sometimes even causing safety hazards.
现在常用的防止电源反接的方法主要有以下几种：1、防反接插件；这种方法是最简单成本最低也最常用的方法，但是一般是作为成品来使用，因为这种接插件咬合后难以分开，对于需要经常拆分的开发场所是不方便的；2、电源输入口的反接二极管；这种方法是开发中经常用的方法，但是这种保护电路只能保护后级电路，设计思想是选择牺牲电源，没有明显的报警装置，容易烧毁电源；3、保险管；虽然可以在很大程度上保护电路，但是更换起来麻烦，同时对于敏感器件，保护效果不明显；4、自保护电路；这种电路一般设计在电源端，防短路状况切断电源输出，一般是做电路的自保护电路。 The commonly used methods to prevent reverse connection of power supply are as follows: 1. Anti-reverse connector; this method is the simplest and most commonly used method with the lowest cost, but it is generally used as a finished product, because this kind of connector bites Difficult to separate, it is inconvenient for the development site that needs to be split frequently; 2. The reverse connection diode of the power input port; this method is often used in development, but this protection circuit can only protect the subsequent circuit. The design idea is to choose to sacrifice the power supply, there is no obvious alarm device, and it is easy to burn the power supply; 3. The fuse; although it can protect the circuit to a large extent, it is troublesome to replace, and for sensitive devices, the protection effect is not obvious; 4. Automatic Protection circuit; this kind of circuit is generally designed at the power supply end to cut off the power supply output in case of short circuit, and is generally used as a self-protection circuit for the circuit.
这些电路保护方法各有自己的应用领域，但是都存在一个问题就是，发生电源反接之后只有报警或者切断电源保护电路，只有用户在纠正电源接口之后才能使电路工作。 These circuit protection methods each have their own application fields, but there is a problem that after the power reverse connection occurs, only the alarm or power supply protection circuit is cut off, and the circuit can only be operated after the user corrects the power interface.
发明内容 Contents of the invention
本发明的目的在于设计一种防反接电路，当电源反接时，不是简单的出现报警，而是自动纠正电路，保证输出端的电源极性，从而可以使用户不再需要考虑电源反接的问题，极大的方便开发。 The purpose of the present invention is to design an anti-reverse connection circuit. When the power supply is reversed, it does not simply alarm, but automatically corrects the circuit to ensure the polarity of the power supply at the output end, so that the user no longer needs to consider the reverse connection of the power supply. problem, which greatly facilitates development.
本发明的技术方案是：一种防反接电路，其特征在于包括：双刀双掷继电器K、保护二极管D1和反向二极管D2；其中双刀双掷继电器K的管脚K1与电源输入端Ⅰ相连接，管脚K4与电源输入端Ⅱ相连接，管脚K7与反向二极管D2的正极相连，管脚K8与电源输入端Ⅱ相连接；反向二极管D2的负极与电源输入端Ⅰ相连接；保护二极管D1的负极与双刀双掷继电器K的管脚K7相连接，保护二极管D1的正极与双刀双掷继电器K的管脚K8相连接；双刀双掷继电器K的管脚K2和管脚K6均与电源正输出端相连接；双刀双掷继电器K的管脚K3和管脚K5均与电源负输出端相连接。 The technical solution of the present invention is: an anti-reverse connection circuit, which is characterized in that it includes: a double-pole double-throw relay K, a protection diode D1 and a reverse diode D2; wherein the pin K1 of the double-pole double-throw relay K is connected to the power input Phase I is connected, pin K4 is connected to the power input terminal II, pin K7 is connected to the anode of the reverse diode D2, pin K8 is connected to the power input terminal II; the negative pole of the reverse diode D2 is connected to the power input terminal I Connection; the negative pole of the protection diode D1 is connected to the pin K7 of the double-pole double-throw relay K, and the positive pole of the protection diode D1 is connected to the pin K8 of the double-pole double-throw relay K; the pin K2 of the double-pole double-throw relay K Both pin K3 and pin K6 of the double-pole double-throw relay K are connected to the positive output end of the power supply; both pins K3 and pin K5 of the double-pole double-throw relay K are connected to the negative output end of the power supply.
所述的双刀双掷继电器K有八个管脚，即：管脚K1、管脚K2、管脚K3、管脚K4、管脚K5、管脚K6、管脚K7、管脚K8，其中管脚K7和K8为控制管脚，管脚K7为第一控制引脚，管脚K8为第二控制引脚；当双刀双掷继电器K不工作时，即管脚K7和K8之间没有电压时，管脚K1与K2连通，管脚K4与K5连通；当双刀双掷继电器K工作时，管脚K1与K3连通，管脚K4与K6连通。 The DPDT relay K has eight pins, namely: pin K1, pin K2, pin K3, pin K4, pin K5, pin K6, pin K7, pin K8, wherein Pins K7 and K8 are control pins, pin K7 is the first control pin, and pin K8 is the second control pin; when the double-pole double-throw relay K is not working, that is, there is no relay between pins K7 and K8 When the voltage is high, the pins K1 and K2 are connected, and the pins K4 and K5 are connected; when the DPDT relay K is working, the pins K1 and K3 are connected, and the pins K4 and K6 are connected.
所述的反向二极管D2的反向耐压值高于电源输入电压。 The reverse withstand voltage of the reverse diode D2 is higher than the input voltage of the power supply.
本发明的工作原理是：当电源的正端接入电路的电源输入端Ⅰ，电源的负端接入电路的电源输入端Ⅱ时，由于反向二极管的存在，双刀双掷继电器的控制管脚K7与K8之间没有电压，从而没有电流流过，继电器不工作，即处于静态状态，此时电源的正端通过管脚K1与K2连接到电源正输出端，电源的负端通过管脚K4与K5连接到电源负输出端； The working principle of the present invention is: when the positive terminal of the power supply is connected to the power input terminal I of the circuit, and the negative terminal of the power supply is connected to the power input terminal II of the circuit, due to the existence of the reverse diode, the control tube of the double pole double throw relay There is no voltage between pins K7 and K8, so there is no current flowing, the relay does not work, that is, it is in a static state. At this time, the positive terminal of the power supply is connected to the positive output terminal of the power supply through pins K1 and K2, and the negative terminal of the power supply is connected to the positive output terminal of the power supply through pins K4 and K5 are connected to the negative output terminal of the power supply;
当电源的正端接入电路的电源输入端Ⅱ，电源的负端接入电路的电源输入端Ⅰ时，反向二极管正向接入电路，反向二极管导通，从而双刀双掷继电器的控制管脚K7与K8之间有电压，从而有电流流过，继电器启动，吸合开关，即将管脚K1与K3连接，管脚K4与K6连接，从而，使电源的正端通过管脚K4与K6连接到电源正输出端，电源的负端通过管脚K1与K3连接到电源负输出端； When the positive terminal of the power supply is connected to the power input terminal II of the circuit, and the negative terminal of the power supply is connected to the power input terminal I of the circuit, the reverse diode is connected to the circuit in the forward direction, and the reverse diode is turned on, so that the double pole double throw relay There is a voltage between the control pins K7 and K8, so that a current flows, the relay is started, and the switch is pulled in, that is, the pins K1 and K3 are connected, and the pins K4 and K6 are connected, so that the positive end of the power supply passes through the pin K4 Connect to the positive output terminal of the power supply with K6, and connect the negative terminal of the power supply to the negative output terminal of the power supply through pins K1 and K3;
所以，无论电源如何接入电路输入端，电路输出端的极性保持不变，电源输出端输出正极，电源输出端输出负极。 Therefore, no matter how the power supply is connected to the input terminal of the circuit, the polarity of the output terminal of the circuit remains unchanged, the output terminal of the power supply outputs the positive pole, and the output terminal of the power supply outputs the negative pole.
本发明的优点是：适用于各种模拟数字电路电源输入口的保护电路，本发明结构简单，成本低廉，无需区分电源正负极均可保证电路的正常工作，使开发者完全不用担心电源反接的问题，使用方便。 The advantage of the present invention is that it is suitable for the protection circuit of various analog and digital circuit power input ports. Answer the question, easy to use.
附图说明 Description of drawings
下面结合设计图对本发明作进一步说明： Below in conjunction with design drawing, the present invention will be further described:
图1是本发明一种防反接电路的电路图； Fig. 1 is the circuit diagram of a kind of anti-reverse connection circuit of the present invention;
图1中：1、电源输入端Ⅰ；2、电源输入端Ⅱ；3、电源正输出端；4、电源负输出端；K、双刀双掷继电器；D1、保护二极管；D2、反向二极管。 In Figure 1: 1. Power input terminal Ⅰ; 2. Power input terminal Ⅱ; 3. Power supply positive output terminal; 4. Power supply negative output terminal; K, double-pole double-throw relay; D1, protection diode; D2, reverse diode .
具体实施方式 detailed description
如图1所示是本发明一种防反接电路，由双刀双掷继电器K、保护二极管D1和反向二极管D2；其中双刀双掷继电器K的管脚K1与电源输入端Ⅰ１相连接，管脚K4与电源输入端Ⅱ２相连接，管脚K7与反向二极管D2的正极相连，管脚K8与电源输入端Ⅱ２相连接；反向二极管D2的负极与电源输入端Ⅰ１相连接；保护二极管D1的负极与双刀双掷继电器K的管脚K7相连接，正极与双刀双掷继电器K的管脚K8相连接；双刀双掷继电器K的管脚K2和管脚K6均与电源正输出端3相连接；双刀双掷继电器K的管脚K3和管脚K5均与电源负输出端4相连接。 As shown in Figure 1 is an anti-reverse connection circuit of the present invention, which consists of a double-pole double-throw relay K, a protection diode D1 and a reverse diode D2; wherein the pin K1 of the double-pole double-throw relay K is connected to the power input terminal I1 , the pin K4 is connected with the power input terminal Ⅱ2, the pin K7 is connected with the anode of the reverse diode D2, the pin K8 is connected with the power input terminal Ⅱ2; the negative pole of the reverse diode D2 is connected with the power input terminal Ⅰ1; the protection The negative pole of the diode D1 is connected to the pin K7 of the double-pole double-throw relay K, and the positive pole is connected to the pin K8 of the double-pole double-throw relay K; the pin K2 and the pin K6 of the double-pole double-throw relay K are both connected to the power supply The positive output terminal 3 is connected; the pins K3 and pin K5 of the double-pole double-throw relay K are both connected to the negative output terminal 4 of the power supply.
双刀双掷继电器K有八个管脚K1、K2、K3、K4、K5、K6、K7和K8，其中管脚K7和K8为控制管脚，管脚K7为第一控制引脚，管脚K8为第二控制引脚；当双刀双掷继电器K不工作时，即管脚K7和K8之间没有电压时，管脚K1与K2连通（常闭触点），管脚K4与K5连通；当双刀双掷继电器K工作时，管脚K1与K3连通（开关触点），管脚K4与K6连通。 Double pole double throw relay K has eight pins K1, K2, K3, K4, K5, K6, K7 and K8, wherein pins K7 and K8 are control pins, pin K7 is the first control pin, pin K8 is the second control pin; when the DPDT relay K is not working, that is, when there is no voltage between the pins K7 and K8, the pins K1 and K2 are connected (normally closed contacts), and the pins K4 and K5 are connected ; When the DPDT relay K works, the pins K1 and K3 are connected (switch contacts), and the pins K4 and K6 are connected.
反向二极管D2的反向耐压值高于电源输入电压，保证不被电源击穿。 The reverse withstand voltage value of the reverse diode D2 is higher than the input voltage of the power supply, ensuring that it will not be broken down by the power supply.
使用时，将电源的正负端分别接在电路的电源输入端Ⅰ１和电源输入端Ⅱ２即可，无需考虑电路的极性，电路能保证输出端的极性。 When in use, just connect the positive and negative terminals of the power supply to the power input terminal I1 and power input terminal II2 of the circuit respectively, without considering the polarity of the circuit, the circuit can guarantee the polarity of the output terminal.
当电源的正端接入电路的电源输入端Ⅰ１，电源的负端接入电路的电源输入端Ⅱ２时，由于反向二极管D2的存在，双刀双掷继电器K的控制管脚K7与K8之间没有电压，从而没有电流流过，双刀双掷继电器K不工作，即处于静态状态，此时电源的正端通过管脚K1与K2连接到电源正输出端3，电源的负端通过管脚K4与K5连接到电源负输出端4； When the positive terminal of the power supply is connected to the power input terminal I1 of the circuit, and the negative terminal of the power supply is connected to the power input terminal II2 of the circuit, due to the existence of the reverse diode D2, the control pin K7 and K8 of the double-pole double-throw relay K There is no voltage between them, so there is no current flowing, the double-pole double-throw relay K does not work, that is, it is in a static state. At this time, the positive terminal of the power supply is connected to the positive output terminal 3 of the power supply through pins K1 and K2, and the negative terminal of the power supply is connected to the positive output terminal 3 of the power supply through the tube Pins K4 and K5 are connected to the negative output terminal 4 of the power supply;
当电源的正端接入电路的电源输入端Ⅱ２，电源的负端接入电路的电源输入端Ⅰ１时，反向二极管D2正向接入电路，反向二极D2管导通，从而双刀双掷继电器K的控制管脚K7与K8之间有电压，从而有电流流过，双刀双掷继电器K启动，吸合开关，即将管脚K1与K3连接，管脚K4与K6连接，从而，使电源的正端通过管脚K4与K6连接到电源正输出端3，电源的负端通过管脚K1与K3连接到电源负输出端4。 When the positive terminal of the power supply is connected to the power input terminal II2 of the circuit, and the negative terminal of the power supply is connected to the power input terminal I1 of the circuit, the reverse diode D2 is connected to the circuit in the forward direction, and the reverse diode D2 is turned on, so that the double pole There is a voltage between the control pins K7 and K8 of the double-throw relay K, so that a current flows, the double-pole double-throw relay K starts, and the pull-in switch is about to connect the pins K1 and K3, and the pins K4 and K6, so that , so that the positive terminal of the power supply is connected to the positive output terminal 3 of the power supply through the pins K4 and K6, and the negative terminal of the power supply is connected to the negative output terminal 4 of the power supply through the pins K1 and K3.
所以，无论电源如何接入电路输入端，电路输出端的极性保持不变，电源输出端3输出正极，电源输出端4输出负极。 Therefore, no matter how the power supply is connected to the input terminal of the circuit, the polarity of the output terminal of the circuit remains unchanged, the output terminal 3 of the power supply outputs the positive pole, and the output terminal 4 of the power supply outputs the negative pole.
本发明针对现有技术的缺点，所提供的一种防反接电路，使用时，无论电源如何接入输入端，电路都可以通过转换保证输出电压的极性，即保证输出端的正负极性不随电源的正反接而改变，从而可以起到防止因电源反接对后级电路及前端电源造成损伤，同时电路可以正常工作。本发明结构简单，成本低廉，无需区分电源正负极均可保证电路的正常工作，使开发者完全不用担心电源反接的问题，使用方便。 Aiming at the shortcomings of the prior art, the present invention provides an anti-reverse connection circuit. When in use, no matter how the power supply is connected to the input terminal, the circuit can ensure the polarity of the output voltage through conversion, that is, ensure the positive and negative polarity of the output terminal. It does not change with the positive and negative connection of the power supply, so as to prevent damage to the rear-stage circuit and front-end power supply due to the reverse connection of the power supply, and the circuit can work normally at the same time. The invention has simple structure and low cost, and can ensure the normal operation of the circuit without distinguishing the positive and negative poles of the power supply, so that developers do not have to worry about the problem of reverse connection of the power supply at all, and are convenient to use.
以上实施例仅是对本发明的参考说明，并不构成对本发明内容的任何限制，显然在本发明的思想下，可做出不同形式的结构变更，但这些均在本发明的保护之列。 The above embodiment is only a reference description of the present invention, and does not constitute any limitation to the content of the present invention. Obviously, different forms of structural changes can be made under the concept of the present invention, but these are all included in the protection of the present invention.
本实施例没有详细叙述的部分和英文缩写属本行业的公知常识，在网上可以搜索到，这里不一一叙述。 The parts and English abbreviations that are not described in detail in this embodiment belong to the common knowledge in this industry and can be searched on the Internet, so they will not be described one by one here.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255734.XA CN103346552B (en) | 2013-06-25 | 2013-06-25 | A kind of reverse-connection preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255734.XA CN103346552B (en) | 2013-06-25 | 2013-06-25 | A kind of reverse-connection preventing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103346552A CN103346552A (en) | 2013-10-09 |
| CN103346552B true CN103346552B (en) | 2016-04-13 |
Family
ID=49281335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310255734.XA Expired - Fee Related CN103346552B (en) | 2013-06-25 | 2013-06-25 | A kind of reverse-connection preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103346552B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617773A (en) * | 2013-11-04 | 2015-05-13 | 深圳市海洋王照明工程有限公司 | Positive-negative automatic conversion circuit and power output module |
| CN104333319B (en) * | 2014-11-10 | 2017-12-22 | 许继电气股份有限公司 | Input reverse-connection protection circuit for photovoltaic combining inverter |
| CN107332229A (en) * | 2017-08-10 | 2017-11-07 | 珠海经济特区金品电器有限公司 | A kind of display protection circuit for external battery |
| CN108281996A (en) * | 2017-12-29 | 2018-07-13 | 西安睿维申电子科技有限公司 | A kind of battery positive-negative connected circuit for rectifying |
| CN111722691A (en) * | 2020-06-20 | 2020-09-29 | 苏州浪潮智能科技有限公司 | A power supply correction circuit and server |
| CN116345639B (en) * | 2023-05-16 | 2023-10-27 | 深圳市高斯宝电气技术有限公司 | Automatic reverse connection preventing circuit based on operational amplifier control relay |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1137145A2 (en) * | 2000-03-17 | 2001-09-26 | Alps Electric Co., Ltd. | Anti-reverse connection circuit for power supply |
| CN101394078A (en) * | 2007-09-21 | 2009-03-25 | 东莞市京翼电子有限公司 | Automatic switching device for power supply potential |
| CN102570840A (en) * | 2010-12-13 | 2012-07-11 | 深圳市金威源科技股份有限公司 | Voltage anode and cathode polarity switching circuit |
-
2013
- 2013-06-25 CN CN201310255734.XA patent/CN103346552B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1137145A2 (en) * | 2000-03-17 | 2001-09-26 | Alps Electric Co., Ltd. | Anti-reverse connection circuit for power supply |
| CN101394078A (en) * | 2007-09-21 | 2009-03-25 | 东莞市京翼电子有限公司 | Automatic switching device for power supply potential |
| CN102570840A (en) * | 2010-12-13 | 2012-07-11 | 深圳市金威源科技股份有限公司 | Voltage anode and cathode polarity switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103346552A (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103346552B (en) | A kind of reverse-connection preventing circuit | |
| CN203850812U (en) | Load short circuit protection circuit | |
| CN106569015A (en) | AC load detection circuit | |
| CN103336165B (en) | A kind of alternating current-direct current over-current detection circuit | |
| CN205509491U (en) | DC power supply prevents reverse -connection protective circuit | |
| CN104779577A (en) | Over-current protection circuit | |
| CN205231727U (en) | Switching power supply output connects battery to join conversely protection automatic control circuit | |
| CN102857177B (en) | Control and protection circuit for solid-state microwave power amplifier | |
| CN209119488U (en) | A kind of socket device with indicating fault and record storage | |
| CN205123687U (en) | Power protection circuit | |
| CN206442113U (en) | A kind of reverse-connection preventing circuit for DC electric apparatus | |
| CN103337849A (en) | Power source reverse connection protection circuit | |
| CN201946965U (en) | Loop system for clearing overloading fault or short circuiting fault | |
| CN206340954U (en) | A kind of LED drive power and its output end short-circuit protection circuit | |
| CN104122481A (en) | Multifunction cable detection device | |
| CN206180561U (en) | A current foldback circuit for boiler system | |
| CN103529374B (en) | Simple and easy pick-up plate of silicon controlled rectifier | |
| CN204947581U (en) | A kind of station service cuts decision logic circuit soon | |
| CN204302354U (en) | Current detection circuit, measure voltage & current system and traffic lights detection architecture | |
| CN102854436B (en) | A kind of power polarity detection circuit | |
| CN103855702B (en) | The protection circuit and plant-grid connection test device of a kind of anti-impacting with high pressure | |
| CN203909781U (en) | CPU (Central Processor Unit) protection circuit | |
| CN206834742U (en) | A kind of electronic circuit of self-identifying zero line | |
| CN206225986U (en) | A kind of voltage protection system on camera | |
| CN204258605U (en) | The negative and positive dual power control device of Hall current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20180625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |