CN205583676U - Redundant directionless DC power supply protection circuit - Google Patents
Redundant directionless DC power supply protection circuit Download PDFInfo
- Publication number
- CN205583676U CN205583676U CN201620348680.0U CN201620348680U CN205583676U CN 205583676 U CN205583676 U CN 205583676U CN 201620348680 U CN201620348680 U CN 201620348680U CN 205583676 U CN205583676 U CN 205583676U
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- protection circuit
- electric capacity
- varistor
- inductance
- directionless
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model relates to a redundant directionless DC power supply protection circuit, including one -level protection circuit, second grade protection circuit, take rectifier bridge, power indicator and nonpolarity power input certainly, the one -level protection circuit the second grade protection circuit with it is parallelly connected each other from taking the rectifier bridge, the one -level protection circuit includes fuse F1, first electric capacity CX1, second electric capacity CY1, third electric capacity CY3, a piezo -resistor RV1, the 2nd piezo -resistor RV2 and the 3rd piezo -resistor RV3, wherein the 2nd piezo -resistor RV2 with first electric capacity CX1 is earlier parallelly connected, again with second electric capacity CY1 with third electric capacity CY3's current circuit is parallelly connected, again with a piezo -resistor RV1 with the 3rd piezo -resistor RV3's current circuit is parallelly connected, the second grade protection circuit includes first inductance L1, second inductance L2 and transient -suppression diode D1, wherein first inductance L1 with second inductance L2 concatenates respectively on positive and negative polar line way, transient -suppression diode D1 connects between the circuit of the two poles of the earth, the utility model discloses have the overcurrent protection function, the residual voltage is little, stability good, power indicator luminance is unanimous and simple structure, be favorable to monitoring cost and easily realize.
Description
Technical field
This utility model is related to protection of circuit, is specifically related to a kind of redundancy directionless DC source protection circuit.
Background technology
At the industrial environment that the environment such as electric power are more severe; industrial ethernet switch itself is required have higher Electro Magnetic Compatibility degree of protection; therefore use redundant power input; and power input need to be done Electro Magnetic Compatibility protection, it is ensured that communication industry Ethernet exchanging function is properly functioning in more severe electromagnetic interference environment.
Tradition redundant power protection circuit: the protection of one-level common mode uses varistor 681KD14 and ceramic gas discharge tube series connection, varistor 820KD14 is used in differential mode protection, its main residual voltage comes from varistor 681KD14, varistor 820KD14 and ceramic gas discharge tube, second class protection uses the inductance concatenating plug-in unit 330uH on line, add the two-way Transient Suppression Diode of 1.5KE68CA between back end of line again and carry out energy absorption, connect common mode inductance again, suppression common mode disturbances, connect rectifier bridge again, meet directionless input, sample the most exactly optocoupler, because needs LED power display lamp shows, add diode, prevent voltage from pouring in down a chimney, impact sampling.
Tradition redundant power protection use substantial amounts of protection device input is protected, ignore to the requirement such as safety and cost, and use up symplectic power supply indicator carry out sampling output, easily cause LED light brightness disunity, indicate unintelligible a variety of causes of Denging.
Summary of the invention
This utility model purpose is that the one provided to overcome the deficiencies in the prior art possesses that overcurrent protection function, residual voltage be little, good stability, power supply indicator brightness is consistent and simple in construction, is conducive to controlling cost, it is easy to accomplish.
For reaching above-mentioned purpose, this utility model adopts the following technical scheme that.
nullA kind of redundancy directionless DC source protection circuit，Including first class of protection circuit、Safe secondary protection circuit、From taking rectifier bridge、Power supply indicator and the input of nonpolarity power supply，Wherein first class of protection circuit、Safe secondary protection circuit and certainly to take rectifier bridge parallel with one another，Rear end connects power supply indicator and the input of nonpolarity power supply again，Described first class of protection circuit includes electric fuse、First electric capacity、Second electric capacity、3rd electric capacity、First varistor、Second varistor and the 3rd varistor，Wherein said second varistor is the most in parallel with described first electric capacity，In parallel with the series circuit of described second electric capacity and described 3rd electric capacity again，In parallel with the series circuit of described first varistor and described 3rd varistor again，Described safe secondary protection circuit includes the first inductance、Second inductance and Transient Suppression Diode，Wherein said first inductance and described second inductance are serially connected on both positive and negative polarity circuit respectively，Described Transient Suppression Diode is connected between two-wire line.
Described electric fuse, its blowout current is chosen according to bearing power.
Described built by four SS56 Schottky diodes from taking rectifier bridge.
Described first varistor and described 3rd varistor model are 681KD14 type, and described second varistor model is 820KD14 type.
Described power supply indicator uses front end electric resistance partial pressure and LM2904DG4 type two-way operational amplifier to compare and light.
Utilization due to technique scheme, effective effect that this utility model brings: technical solutions of the utility model consider safety and cost, optimize protection circuit and the scheme of power supply indicator, realize over-current over-voltage protection, the omnibearing protections such as Electro Magnetic Compatibility, solve produced problem in traditional scheme, in scheme after improvement, the residual voltage of first class of protection comes from varistor 681KD14, the surge residual voltage of 4KV 8 μ s/20 μ s is about 1200V, the second class protection that rear end is combined by inductance and Transient Suppression Diode can effectively absorb the residual voltage come from after first class of protection, after second class protection, residual voltage can be down to back-end circuit tolerance range.Rear end uses from taking rectifier bridge mode, blood pressure lowering is 0.7V～1.0V, effectively reduces circuit to voltage loss, and uses LM2904DG4 type two-way operational amplifier to compare to light power supply indicator, no matter power supply input range 12V～36V, all can reach brightness consistent.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings technical solutions of the utility model are described further:
Accompanying drawing 1 is the circuit theory diagrams of redundancy of the present utility model directionless DC source protection circuit；
Detailed description of the invention
See Fig. 1, be the circuit theory diagrams of redundancy of the present utility model directionless DC source protection circuit.
As shown in Figure 1; a kind of redundancy directionless DC source protection circuit; including first class of protection circuit 1, safe secondary protection circuit 2, certainly take rectifier bridge 3, power supply indicator and nonpolarity power supply input; wherein first class of protection circuit 1, safe secondary protection circuit 2 and certainly to take rectifier bridge 3 parallel with one another; rear end connects power supply indicator and the input of nonpolarity power supply again; described first class of protection circuit 1 includes an electric fuse, three electric capacity and three varistors, and described safe secondary protection circuit 2 includes two inductance and a Transient Suppression Diode.
First class of protection circuit 1:F1 is electric fuse, and its blowout current can be chosen according to bearing power, can be effectively limited to by input current in specified scope, plays the effect of protection back-end circuit；Second varistor RV2 and the first electric capacity CX1 is the most in parallel, in parallel with the series circuit of the second electric capacity CY1 and the 3rd electric capacity CY3 again, in parallel with the series circuit of the first varistor RV1 and the 3rd varistor RV3 again, wherein the first varistor RV1, the 3rd varistor RV3 choose 681KD14, and the second varistor RV2 chooses 820KD14.
Safe secondary protection circuit 2: using and concatenating plug-in parameter on line is the first inductance L1 of 330uH, the second inductance L2, when there being interference to flow through on line, plays temporary cache effect；Reconnecting two-way Transient Suppression Diode D1 between back end of line, its parameter is 1.5KE68CA, plays absorption energy.
Power supply indicator: sampling uses front end electric resistance partial pressure and LM2904DG4 type two-way operational amplifier to compare, and lights power supply indicator.
From taking rectifier bridge, wherein rectifier bridge is built with 4 Schottky diodes D7, D8, D9, D10, and it is SS56 type, is used for meeting directionless input.
Below it is only concrete exemplary applications of the present utility model, protection domain of the present utility model is not constituted any limitation；The technical scheme that all employing equivalents or equivalence are replaced and formed, within the scope of all falling within this utility model rights protection.
Claims (5)
- null1. a redundancy directionless DC source protection circuit，Including first class of protection circuit、Safe secondary protection circuit、From taking rectifier bridge、Power supply indicator and the input of nonpolarity power supply，It is characterized in that: described first class of protection circuit、Described safe secondary protection circuit and described to take rectifier bridge parallel with one another，Described first class of protection circuit includes electric fuse F1、First electric capacity CX1、Second electric capacity CY1、3rd electric capacity CY3、First varistor RV1、Second varistor RV2 and the 3rd varistor RV3，Wherein said second varistor RV2 is the most in parallel with described first electric capacity CX1，In parallel with the series circuit of described second electric capacity CY1 and described 3rd electric capacity CY3 again，In parallel with the series circuit of described first varistor RV1 and described 3rd varistor RV3 again，Described safe secondary protection circuit includes the first inductance L1、Second inductance L2 and Transient Suppression Diode D1，Wherein said first inductance L1 and described second inductance L2 is serially connected on both positive and negative polarity circuit respectively，Described Transient Suppression Diode D1 is connected between two-wire line.
- A kind of redundancy directionless DC source protection circuit the most according to claim 1, it is characterised in that: the blowout current of described electric fuse F1 is chosen according to bearing power.
- A kind of redundancy directionless DC source protection circuit the most according to claim 1, it is characterised in that: described built by tetra-SS56 type Schottky diodes of D7, D8, D9, D10 from taking rectifier bridge.
- A kind of redundancy directionless DC source protection circuit the most according to claim 1, it is characterised in that: the model of described first varistor RV1 and described 3rd varistor RV3 is 681KD14 type, and described second varistor RV2 model is 820KD14 type.
- A kind of redundancy directionless DC source protection circuit the most according to claim 1, it is characterised in that: described power supply indicator uses front end electric resistance partial pressure and LM2904DG4 type two-way operational amplifier to compare and light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620348680.0U CN205583676U (en) | 2016-04-25 | 2016-04-25 | Redundant directionless DC power supply protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620348680.0U CN205583676U (en) | 2016-04-25 | 2016-04-25 | Redundant directionless DC power supply protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205583676U true CN205583676U (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620348680.0U Expired - Fee Related CN205583676U (en) | 2016-04-25 | 2016-04-25 | Redundant directionless DC power supply protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205583676U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017605A (en) * | 2017-04-07 | 2017-08-04 | 广州市晶卓照明科技有限公司 | Earth leakage protective device |
-
2016
- 2016-04-25 CN CN201620348680.0U patent/CN205583676U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017605A (en) * | 2017-04-07 | 2017-08-04 | 广州市晶卓照明科技有限公司 | Earth leakage protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20200425 |