CN103208793A - Reverse connection prevention circuit for direct current power supply - Google Patents
Reverse connection prevention circuit for direct current power supply Download PDFInfo
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- CN103208793A CN103208793A CN2013101345993A CN201310134599A CN103208793A CN 103208793 A CN103208793 A CN 103208793A CN 2013101345993 A CN2013101345993 A CN 2013101345993A CN 201310134599 A CN201310134599 A CN 201310134599A CN 103208793 A CN103208793 A CN 103208793A
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- power supply
- direct current
- contactor
- current power
- detection module
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- 230000002265 prevention Effects 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 238000004146 energy storage Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a reverse connection prevention circuit for a direct current power supply. The circuit comprises a polarity detection module, a relay and a contactor, wherein the polarity detection module is connected between the positive and negative input ends of the direct current power supply, and is used for detecting the normal connection or reverse connection of the direct current power supply, and outputting a corresponding signal; one end of a coil of the relay is connected with the output end of the polarity detection module, and a contact of the relay is connected in series with a coil of the contactor; and a main contact of the contactor is connected in series between the positive input end of the direct current power supply and a load. The circuit is safe, reliable and particularly effective to a high-power direct current system, and can be directly applied to an energy bidirectional flowing direct current power system to solve the problem of reverse polarity connection of the system, and the loss of system efficiency is avoided.
Description
Technical field
The present invention relates to a kind of anti-reverse connection circuit of direct current power supply.
Background technology
Traditional photovoltaic DC-to-AC converter all is connected DC power supply with the input of systems such as energy storage inverter; in order to improve system safety and reliability; often need increase the anti-reverse structure of DC power supply at dc power output end; with reference to Figure 1 shows that anti-reverse connection circuit of direct current power supply of the prior art; it adopts in the dc power output end circuit serial connection diode and then prevents because the DC power supply both positive and negative polarity is caused the electronic component damage by reversal connection; Udc+ among the figure; Udc-just is being respectively DC power supply; negative input end; D1 is diode; power conversion module is that the core texture of photovoltaic DC-to-AC converter and energy storage inverter is as the load of DC power supply; this mode cost height; loss on the diode D1 is bigger; the heat dissipation capacity height; increase system power dissipation and unsteadiness factor; system effectiveness and reliability are low; and the circuit that connects photovoltaic DC-to-AC converter or energy storage inverter for the direct current system that the electric energy two-way flow is arranged such as DC power supply; then adopt the mode of this anti-reverse diode can't solve the problem of DC power supply error-polarity connection; simultaneously under the applicable cases of big electric current; be difficult to find single capacity and parameter to satisfy the diode (led) module of system power requirement; it is a difficult problem in the current counnter attack protection; so the anti-reverse measure of a kind of brand-new DC power supply is extremely urgent, in particular for solving the anti-reverse problem of energy two-way flow DC power supply.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of reliably efficient, convenient and practical anti-reverse connection circuit of direct current power supply.
Technological means of the present invention is as follows:
A kind of anti-reverse connection circuit of direct current power supply comprises:
Be connected between the positive and negative input of DC power supply, just connecing or the polarity detection module of reversal connection and output corresponding signal for detection of DC power supply;
Relay; Described relay coil one end connects polarity detection module output, connects with contactor coil in the contact of this relay;
Contactor; The main contacts of described contactor is serially connected between DC power supply positive input terminal and the load;
In addition, also comprise connecting polarity detection module output, be used for the main contacts closure of control contactor or the CPU module that disconnects;
As preferably, described polarity detection module is the output high level when detecting DC power supply and just connecing, output low level when detecting the DC power supply reversal connection; Described relay coil other end ground connection, the contact is normally opened contact;
As preferably, described polarity detection module is output low level when detecting DC power supply and just connecing, output high level when detecting the DC power supply reversal connection; Described relay coil other end ground connection, the contact is normally-closed contact;
As preferably, the main contacts of described contactor is normally opened contact;
As preferably, when described polarity detection module detected the DC power supply reversal connection, described CPU module controls contactor main contacts disconnected.
Owing to adopted technique scheme; anti-reverse connection circuit of direct current power supply provided by the invention; by the polarity detection module to DC power supply just; whether negative input end connects anti-the detection; simultaneously according to the different corresponding level signals of DC power supply polarization state output; this level signal drives relay; relay contact joining is in the wire loop of contactor; switch as the contactor coil power supply; when the polarity detection module detects the DC power supply reversal connection; then relay is not closed; contactor coil can't be powered so; the contactor main contacts that then is serially connected between DC power supply positive input terminal and the load can not be closed; and then realize that the DC power supply output voltage can't arrive load-side when the DC power supply reversal connection; thereby the electronic component of protection load-side is not damaged; the loss that has also solved on the diode that available technology adopting serial connection diode causes is bigger; the heat dissipation capacity height; increase system power dissipation and unsteadiness factor; the problem that system effectiveness and reliability are low; and can directly apply in the system of energy two-way flow DC power supply in order to solve the error-polarity connection problem of this system; utilize the level signal of CPU module receiving polarity detection module output simultaneously; the closed and disconnected of the direct control contactor of this CPU module; so when the polarity detection module detects the DC power supply reversal connection; the direct control contactor main contacts of CPU module disconnects; realized the effect of further duplicate protection; safe and reliable; and the present invention can loss system efficient, and is especially effective for powerful direct current system.
Description of drawings
Fig. 1 is the structural representation of the anti-reverse connection circuit of direct current power supply of prior art;
Fig. 2 is the structural representation of the anti-reverse connection circuit of direct current power supply that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
A kind of anti-reverse connection circuit of direct current power supply as shown in Figure 2 comprises: be connected between the positive and negative input Udc+ of DC power supply, the Udc-, just connecing or the polarity detection module of reversal connection and output corresponding signal for detection of DC power supply; Relay K 1; Described relay K 1 coil one end connects polarity detection module output, connects with contactor KM1 coil in the contact of this relay K 1; Contactor KM1; The main contacts of described contactor KM1 is serially connected between DC power supply positive input terminal Udc+ and the load; In addition, also comprise connecting polarity detection module output, be used for the main contacts closure of control contactor KM1 or the CPU module that disconnects; As preferably, described polarity detection module is the output high level when detecting DC power supply and just connecing, output low level when detecting the DC power supply reversal connection; Described relay K 1 coil other end ground connection, the contact is normally opened contact; As preferably, described polarity detection module is output low level when detecting DC power supply and just connecing, output high level when detecting the DC power supply reversal connection; Described relay K 1 coil other end ground connection, the contact is normally-closed contact; As preferably, the main contacts of described contactor KM1 is normally opened contact; As preferably, when described polarity detection module detected the DC power supply reversal connection, described CPU module controls contactor KM1 main contacts disconnected.
When practical application is of the present invention; polarity detection module wherein can be single-chip microcomputer or electronic circuitry involved; the CPU module can be by control contactor KM1 the switch of coil power reach the closed and disconnected of control contactor KM1 main contacts; wherein coil power connects contactor KM1 coil and the two ends, relay K 1 contact of series connection mutually by input Uac; contactor KM1 main contacts closure when DC power supply just connects; disconnect during the DC power supply reversal connection; load is energy storage inverter or the included power conversion module of photovoltaic DC-to-AC converter among Fig. 2; the contactor KM1 coil of series connection is connected contactor KM1 coil power supply power supply with two ends, relay K 1 contact by input Uac mutually; anti-reverse connection circuit of direct current power supply provided by the invention; by the polarity detection module to DC power supply just; negative input end Udc+; whether Udc-connects anti-the detection; simultaneously according to the different corresponding level signals of DC power supply polarization state output; this level signal drives relay K 1; relay K 1 contact is serially connected in the wire loop of contactor KM1; switch as contactor KM1 coil power; when the polarity detection module detects the DC power supply reversal connection; then relay K 1 is not closed; contactor KM1 coil can't be powered so; the contactor KM1 main contacts that then is serially connected between DC power supply positive input terminal and the load can not be closed; and then realize that the DC power supply output voltage can't arrive load-side when the DC power supply reversal connection; thereby the electronic component of protection load-side is not damaged; the loss that has also solved on the diode that available technology adopting serial connection diode causes is bigger; the heat dissipation capacity height; increase system power dissipation and unsteadiness factor; the problem that system effectiveness and reliability are low; and can directly apply in the system of energy two-way flow DC power supply in order to solve the error-polarity connection problem of this system; utilize the level signal of CPU module receiving polarity detection module output simultaneously; the closed and disconnected of the direct control contactor of this CPU module; so when the polarity detection module detects the DC power supply reversal connection; the direct control contactor main contacts of CPU module disconnects; as shown in Figure 2; the closed and disconnected that adopts the CPU module to be serially connected in the relay K 2 of contactor KM1 wire loop by control reaches the purpose of the closed and disconnected of control contactor; during use; can will utilize the control of polarity detection module outputs level signals to be serially connected in the technical scheme of the relay of contactor coil electric power loop; use separately respectively with the technical scheme by the direct control contactor of CPU module controls; also can use simultaneously; realize the effect of further duplicate protection; safe and reliable; and the present invention can loss system efficient; especially effective for powerful direct current system; be applicable to the anti-reverse problem of various DC power supply that solves; especially be applied to the energy two-way flow as with photovoltaic DC-to-AC converter; the energy storage inverter; in the DC power supply that is connected based on the Related product of PWM four-quadrant rectifier principle, significant for the reliability that improves whole system.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (6)
1. anti-reverse connection circuit of direct current power supply is characterized in that comprising:
Be connected between the positive and negative input of DC power supply, just connecing or the polarity detection module of reversal connection and output corresponding signal for detection of DC power supply;
Relay; Described relay coil one end connects polarity detection module output, connects with contactor coil in the contact of this relay;
Contactor; The main contacts of described contactor is serially connected between DC power supply positive input terminal and the load.
2. a kind of anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that also comprising connecting polarity detection module output, is used for the main contacts closure of control contactor or the CPU module that disconnects.
3. a kind of anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that described polarity detection module output high level when detecting DC power supply and just connecing, output low level when detecting the DC power supply reversal connection; Described relay coil other end ground connection, the contact is normally opened contact.
4. a kind of anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that described polarity detection module output low level when detecting DC power supply and just connecing, output high level when detecting the DC power supply reversal connection; Described relay coil other end ground connection, the contact is normally-closed contact.
5. according to claim 3 or 4 described a kind of anti-reverse connection circuit of direct current power supply, the main contacts that it is characterized in that described contactor is normally opened contact.
6. a kind of anti-reverse connection circuit of direct current power supply according to claim 1 is characterized in that when described polarity detection module detects the DC power supply reversal connection, and described CPU module controls contactor main contacts disconnects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310134599.3A CN103208793B (en) | 2013-04-17 | 2013-04-17 | Anti-reverse connection circuit of direct current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310134599.3A CN103208793B (en) | 2013-04-17 | 2013-04-17 | Anti-reverse connection circuit of direct current power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103208793A true CN103208793A (en) | 2013-07-17 |
| CN103208793B CN103208793B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310134599.3A Expired - Fee Related CN103208793B (en) | 2013-04-17 | 2013-04-17 | Anti-reverse connection circuit of direct current power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631011A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of battery connecting apparatus |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| CN109390928A (en) * | 2017-08-04 | 2019-02-26 | 台达电子企业管理（上海）有限公司 | Auxiliary power supply and its method of supplying power to |
| CN109546642A (en) * | 2019-01-02 | 2019-03-29 | 阳光电源股份有限公司 | A kind of inverter direct current input reverse-connection protective module and device |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| CN113933737A (en) * | 2020-07-09 | 2022-01-14 | 中车兰州机车有限公司 | Train power supply test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519559A (en) * | 1994-07-11 | 1996-05-21 | Aerospatiale Societe Nationale Industrielle | Electronic connection device with reverse polarity protection |
| US20010024108A1 (en) * | 2000-03-17 | 2001-09-27 | Alps Electric Co., Ltd. | Anti-reverse connection circuit for power supply |
| CN201312124Y (en) * | 2008-12-09 | 2009-09-16 | 黄敬党 | Protection circuit for preventing accumulator charging and reversal connection |
| CN201717802U (en) * | 2010-07-05 | 2011-01-19 | 常熟开关制造有限公司(原常熟开关厂） | Reverse connection protection inverter circuit |
| CN201893729U (en) * | 2010-11-26 | 2011-07-06 | 比亚迪股份有限公司 | Photovoltaic power generation device |
| CN102369644A (en) * | 2011-06-08 | 2012-03-07 | 华为技术有限公司 | Control circuit for preventing battery group from being reversely connected and power supply system for base station |
-
2013
- 2013-04-17 CN CN201310134599.3A patent/CN103208793B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519559A (en) * | 1994-07-11 | 1996-05-21 | Aerospatiale Societe Nationale Industrielle | Electronic connection device with reverse polarity protection |
| US20010024108A1 (en) * | 2000-03-17 | 2001-09-27 | Alps Electric Co., Ltd. | Anti-reverse connection circuit for power supply |
| CN201312124Y (en) * | 2008-12-09 | 2009-09-16 | 黄敬党 | Protection circuit for preventing accumulator charging and reversal connection |
| CN201717802U (en) * | 2010-07-05 | 2011-01-19 | 常熟开关制造有限公司(原常熟开关厂） | Reverse connection protection inverter circuit |
| CN201893729U (en) * | 2010-11-26 | 2011-07-06 | 比亚迪股份有限公司 | Photovoltaic power generation device |
| CN102369644A (en) * | 2011-06-08 | 2012-03-07 | 华为技术有限公司 | Control circuit for preventing battery group from being reversely connected and power supply system for base station |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| CN108631011A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of battery connecting apparatus |
| CN108631011B (en) * | 2017-03-24 | 2023-01-03 | 中兴通讯股份有限公司 | Battery connecting device |
| CN109390928A (en) * | 2017-08-04 | 2019-02-26 | 台达电子企业管理（上海）有限公司 | Auxiliary power supply and its method of supplying power to |
| CN109546642A (en) * | 2019-01-02 | 2019-03-29 | 阳光电源股份有限公司 | A kind of inverter direct current input reverse-connection protective module and device |
| CN113933737A (en) * | 2020-07-09 | 2022-01-14 | 中车兰州机车有限公司 | Train power supply test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103208793B (en) | 2016-08-10 |
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