CN103208793B - Anti-reverse connection circuit of direct current power supply - Google Patents
Anti-reverse connection circuit of direct current power supply Download PDFInfo
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- CN103208793B CN103208793B CN201310134599.3A CN201310134599A CN103208793B CN 103208793 B CN103208793 B CN 103208793B CN 201310134599 A CN201310134599 A CN 201310134599A CN 103208793 B CN103208793 B CN 103208793B
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- 239000003054 catalyst Substances 0.000 claims abstract description 26
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
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Abstract
The invention discloses a kind of anti-reverse connection circuit of direct current power supply, including: it is connected between the positive and negative input of DC source, is just connecing or the Check up polarity module of reversal connection output corresponding signal for detecting DC source；Relay；Described relay coil one end connects Check up polarity module outfan, connects with contactor coil in the contact of this relay；Catalyst；The main contacts of described catalyst is serially connected between DC source positive input terminal and load；The present invention is safe and reliable, and will not lose system effectiveness, is particularly effective for powerful straight-flow system, it is possible to directly apply in the system of energy in bidirectional flow DC source to solve the error-polarity connection problem of this system.
Description
Technical field
The present invention relates to a kind of anti-reverse connection circuit of direct current power supply.
Background technology
The input of the systems such as traditional photovoltaic DC-to-AC converter and energy storage inverter is all connected with DC source, in order to carry
High security of system and reliability, generally require and increase preventing reverse connection for DC power source structure at DC power output end,
Showing anti-reverse connection circuit of direct current power supply of the prior art with reference to Fig. 1, it uses at DC power output end
Series diode and then prevent owing to DC source both positive and negative polarity is caused electronic component to damage by reversal connection in circuit,
In figure, Udc+, Udc-are respectively the positive and negative input of DC source, and D1 is diode, power conversion module
It is the core texture load as DC source of photovoltaic DC-to-AC converter and energy storage inverter, this mode cost height,
Loss on diode D1 is relatively big, heat dissipation capacity is high, increases system power dissipation and unstability factor, system effectiveness
Low with reliability, and for there being the straight-flow system such as DC source of realizing bidirectional electric energy flow to connect photovoltaic inversion
Device or the circuit of energy storage inverter, then use the mode of this anti-reverse diode cannot solve unidirectional current source electrode
Property reversal connection problem, simultaneously under the applicable cases of big electric current, be difficult to find single capacity and parameter to meet system
The diode (led) module of system current requirements, is a difficult problem in current counnter attack protection, therefore a kind of brand-new direct current
Power supply reverse connection protection measure is extremely urgent, asks in particular for solving the anti-reverse of energy in bidirectional flow DC source
Topic.
Summary of the invention
The present invention is directed to the proposition of problem above, and develop a kind of the most efficient, convenient and practical DC source
Reverse-connection preventing circuit.
The technological means of the present invention is as follows:
A kind of anti-reverse connection circuit of direct current power supply, including:
It is connected between the positive and negative input of DC source, is used for detecting DC source and is just connecing or reversal connection exporting
Check up polarity module to induction signal；
Relay；Described relay coil one end connects Check up polarity module outfan, the contact of this relay
Connect with contactor coil；
Catalyst；The main contacts of described catalyst is serially connected between DC source positive input terminal and load；
It addition, also include connect Check up polarity module outfan, for control contactor main contacts close or
The CPU module disconnected；
As preferably, described Check up polarity module is output high level when detecting that DC source just connects, and works as inspection
Output low level when measuring DC source reversal connection；Described relay coil other end ground connection, contact is normally opened touching
Point；
As preferably, described Check up polarity module is output low level when detecting that DC source just connects, and works as inspection
Output high level when measuring DC source reversal connection；Described relay coil other end ground connection, contact is normally closed touching
Point；
As preferably, the main contacts of described catalyst is normally opened contact；
As preferably, when described Check up polarity module detects DC source reversal connection, described CPU module control
Catalyst main contacts processed disconnects.
Owing to have employed technique scheme, the anti-reverse connection circuit of direct current power supply that the present invention provides, passes through polarity
Whether detection module connects anti-detection to the positive and negative input of DC source, simultaneously according to different direct currents
The level signal that electric power polarity State-output is corresponding, this level signal drives relay, relay contact joining
In the wire loop of catalyst, as the switch of contactor coil power supply, when Check up polarity module detects
DC source reversal connection, then relay does not closes, then contactor coil cannot be powered, then be serially connected in unidirectional current
Catalyst main contacts between source positive input terminal and load can not close, and then realizes when DC source reversal connection
DC power output voltage cannot arrive load-side, thus protects the electronic component of load-side without damage, also
Solve and prior art uses the loss on the diode that causes of series diode is relatively big, heat dissipation capacity is high, increase
Adding system power consumption and the low problem of unstability factor, system effectiveness and reliability, and can directly apply to
To solve the error-polarity connection problem of this system in the system of energy in bidirectional flow DC source, utilize simultaneously
The level signal of CPU module receiving polarity detection module output, the Guan Bi of the direct control contactor of this CPU module
And disconnection, then when Check up polarity module detects DC source reversal connection, the direct control contactor of CPU module
Main contacts disconnects, it is achieved that the further effect of duplicate protection, safe and reliable, and the present invention will not lose
System effectiveness, is particularly effective for powerful straight-flow system.
Accompanying drawing explanation
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 the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
A kind of anti-reverse connection circuit of direct current power supply as shown in Figure 2, including: it is connected to DC source positive and negative defeated
Enter and hold between Udc+, Udc-, just connecing or the polarity inspection of reversal connection output corresponding signal for detecting DC source
Survey module；Relay K 1；Described relay K 1 coil one end connects Check up polarity module outfan, this relay
The contact of device K1 and catalyst KM1 coils connected in series；Catalyst KM1；The main contacts string of described catalyst KM1
It is connected between DC source positive input terminal Udc+ and load；It addition, also include connecting the output of Check up polarity module
End, the CPU module that the main contacts for control contactor KM1 closes or disconnects；As preferably, described pole
Property detection module output high level when detecting that DC source just connects, defeated when DC source reversal connection being detected
Go out low level；Described relay K 1 coil other end ground connection, contact is normally opened contact；As preferably, described
Check up polarity module is output low level when detecting that DC source just connects, when DC source reversal connection being detected
Output high level；Described relay K 1 coil other end ground connection, contact is normally-closed contact；As preferably, institute
The main contacts stating catalyst KM1 is normally opened contact；As preferably, when described Check up polarity module detects directly
During stream reverse power connection, described CPU module control contactor KM1 main contacts disconnects.
During the actual application present invention, Check up polarity module therein can be single-chip microcomputer or associated electronic circuits,
CPU module can reach control contactor KM1 master by the switch of the coil power of control contactor KM1 and touch
The closed and disconnected of point, wherein coil power connects the catalyst KM1 line being serially connected by input Uac
Circle and two ends, relay K 1 contact, catalyst KM1 main contacts closes when DC source just connects, DC source
Disconnect during reversal connection, load power conversion module included by energy storage inverter or photovoltaic DC-to-AC converter in Fig. 2,
The catalyst KM1 coil being serially connected and two ends, relay K 1 contact connect catalyst KM1 by input Uac
Coil power supply power supply, the anti-reverse connection circuit of direct current power supply that the present invention provides, by Check up polarity module to direct current
Whether positive and negative input Udc+, Udc-of power supply connects anti-detection, simultaneously according to different DC sources
The level signal that polarization state output is corresponding, this level signal drives relay K 1, and relay K 1 contact concatenates
In the wire loop of catalyst KM1, as the switch of catalyst KM1 coil power, when Check up polarity mould
Block detects DC source reversal connection, then relay K 1 does not closes, then catalyst KM1 coil cannot be powered,
The catalyst KM1 main contacts being then serially connected between DC source positive input terminal and load can not close, Jin Ershi
Now when DC source reversal connection, DC power output voltage cannot arrive load-side, thus protects the electricity of load-side
Sub-element is without damage, also solves the loss on the diode using series diode to cause in prior art
The problem that relatively big, heat dissipation capacity height, increase system power dissipation and unstability factor, system effectiveness and reliability are low,
And can directly apply in the system of energy in bidirectional flow DC source so that the polarity solving this system is anti-
Connecing problem, utilize the level signal that CPU module receiving polarity detection module exports simultaneously, this CPU module is straight
Connect the closed and disconnected of control contactor, then when Check up polarity module detects DC source reversal connection, CPU
Module direct control contactor main contacts disconnects, as in figure 2 it is shown, use CPU module to be serially connected in by control
The closed and disconnected of the relay K 2 of catalyst KM1 wire loop reaches the closed and disconnected of control contactor
Purpose, during use, can control to be serially connected in contactor coil by utilizing Check up polarity module outputs level signals
The technical scheme of the relay of electric power loop, and the technical side of direct control contactor is controlled by CPU module
Case is individually applied, it is also possible to apply simultaneously, it is achieved the further effect of duplicate protection, safe and reliable,
And the present invention will not lose system effectiveness, powerful straight-flow system is particularly effective, it is adaptable to solve each
Kind of preventing reverse connection for DC power source problem, is particularly applied to energy in bidirectional flow as inverse with photovoltaic DC-to-AC converter, energy storage
In the DC source that change device, Related product based on PWM four-quadrant rectifier principle are connected, for improving
The reliability of whole system is significant.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office
Being limited to this, any those familiar with the art is in the technical scope that the invention discloses, according to this
The technical scheme of invention and inventive concept thereof in addition equivalent or change, all should contain the protection in the present invention
Within the scope of.
Claims (4)
1. an anti-reverse connection circuit of direct current power supply, described DC source is energy in bidirectional flow device, its feature
It is to include:
It is connected between the positive and negative input of DC source, is used for detecting DC source and is just connecing or reversal connection exporting
Check up polarity module to induction signal；
Relay；Described relay coil one end connects Check up polarity module outfan, the contact of this relay
Connect with contactor coil；Described relay coil other end ground connection；
Catalyst；The main contacts of described catalyst is serially connected between DC source positive input terminal and load；
Described reverse-connection preventing circuit also includes connecting Check up polarity module outfan, and the master for control contactor touches
Point Guan Bi or the CPU module disconnected；
When described Check up polarity module detects DC source reversal connection, described CPU module control contactor master
Contact disconnects；
By Check up polarity module whether the positive and negative input of DC source is connect anti-detection, and according to
The level signal that different DC power polarity State-outputs is corresponding, this level signal drives relay, works as pole
Property detection module detects DC source reversal connection, then relay does not closes, and then the coil of catalyst cannot supply
Electricity, then the main contacts being serially connected in the catalyst between DC source positive input terminal and load can not close, direct current
Electric power output voltage cannot arrive load-side, utilizes the electricity that CPU module receiving polarity detection module exports simultaneously
Ordinary mail number, the closed and disconnected of the direct control contactor of this CPU module, when Check up polarity module detects directly
During stream reverse power connection, CPU module direct control contactor main contacts disconnects.
A kind of anti-reverse connection circuit of direct current power supply the most according to claim 1, it is characterised in that described polarity
Detection module is output high level when detecting that DC source just connects, and exports when DC source reversal connection being detected
Low level；The contact of described relay is normally opened contact.
A kind of anti-reverse connection circuit of direct current power supply the most according to claim 1, it is characterised in that described polarity
Detection module is output low level when detecting that DC source just connects, and exports when DC source reversal connection being detected
High level；The contact of described relay is normally-closed contact.
4. according to a kind of anti-reverse connection circuit of direct current power supply described in Claims 2 or 3, it is characterised in that described
The main contacts of catalyst is normally opened contact.
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 CN103208793A (en) | 2013-07-17 |
| CN103208793B true CN103208793B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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Families Citing this family (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 |
| WO2016123305A1 (en) | 2015-01-28 | 2016-08-04 | Abb Technology Ag | Energy panel arrangement shutdown |
| EP3259841B1 (en) | 2015-02-22 | 2020-10-07 | MARICI Holdings The Netherlands B.V. | Photovoltaic string reverse polarity detection |
| CN115832472A (en) * | 2017-03-24 | 2023-03-21 | 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 |
| CN109546642B (en) * | 2019-01-02 | 2021-04-13 | 阳光电源股份有限公司 | Inverter direct-current input reverse connection protection 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 |
| CN112689340A (en) * | 2020-12-02 | 2021-04-20 | 深圳市氢蓝时代动力科技有限公司 | Reverse connection control circuit and heating device |
Citations (4)
| 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 |
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001268784A (en) * | 2000-03-17 | 2001-09-28 | Alps Electric Co Ltd | Inverse connection preventing circuit of power source |
| CN201893729U (en) * | 2010-11-26 | 2011-07-06 | 比亚迪股份有限公司 | Photovoltaic power generation device |
-
2013
- 2013-04-17 CN CN201310134599.3A patent/CN103208793B/en not_active Expired - Fee Related
Patent Citations (4)
| 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 |
| 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 |
| 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 |
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| CN103208793A (en) | 2013-07-17 |
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