CN208257656U - A kind of high voltage DC source protecting against shock reverse-connection preventing circuit - Google Patents
A kind of high voltage DC source protecting against shock reverse-connection preventing circuit Download PDFInfo
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- CN208257656U CN208257656U CN201820875004.8U CN201820875004U CN208257656U CN 208257656 U CN208257656 U CN 208257656U CN 201820875004 U CN201820875004 U CN 201820875004U CN 208257656 U CN208257656 U CN 208257656U
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- converter
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- normally opened
- high voltage
- protecting against
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Abstract
The utility model discloses a kind of high voltage DC source protecting against shock reverse-connection preventing circuit, it is characterized in that, it include: DC-DC converter, normally opened relay, normal open switch pipe, resistance, diode and control circuit, resistance and Diode series and the contact both ends for being connected respectively to normally opened relay, the input terminal of normally opened relay connection DC-DC converter, the output end of DC-DC converter is connected to normal open switch pipe and control circuit, high voltage direct current flows through resistance and diode arrives DC-DC converter again, DC-DC converter is started to work when reaching operating voltage and output voltage rises, after the output voltage of DC-DC converter reaches setting voltage, normally opened relay closure, and normally opened relay controls normal open switch pipe by control circuit and is closed.The utility model can prevent DC-DC converter input current impact in the input of high pressure DC DC current excessive, while realize that relay contact low voltage difference closure prevents contact from striking sparks and preventing input DC power supply reversal connection, it is ensured that the stabilization and reliability of component.
Description
Technical field
The utility model relates to field of switch power, especially a kind of high voltage DC source protecting against shock reverse-connection preventing circuit.
Background technique
In DC high voltage power supply field, since DC DC voltage is very high, the DC voltage after the rectification of 1140 normal voltages exists
1600V or so, peak value are even more super 2KV, and usual power supply device is very big in the electric current for connecting DC DC voltage moment, causes to insure
Silk or other devices damage, it is therefore necessary to input dash current be limited, but less held since input voltage is excessively high
Easily realize.It is existing to solve the problems, such as this with traditional relay mode, but power supply will take voltage from high-voltage end, be lost quite big
Cost is very high, and relay circuit the phenomenon that there are contact sparkings, especially continuous switching on and shutting down when be even more that not can avoid.In height
Under pressure condition, a contact sparking is possible to cause contact that can not restore, and cannot achieve counnter attack series thermal-sensitive resistance
Defencive function is connect, the dash current for taking and being switched under heat engine state can not be also carved.
Utility model content
In view of the foregoing drawbacks, the utility model intends to solve the technical problem by providing a kind of high voltage DC source protecting against shock counnter attacks
Circuit is connect, prevents DC-DC converter input current impact in the input of high pressure DC DC current excessive, while realizing that relay touches
Point low voltage difference closure prevents contact from striking sparks and preventing input DC power supply reversal connection, it is ensured that the stabilization and reliability of component.
In order to solve the above technical problems, the technical solution of the utility model are as follows: a kind of high voltage DC source protecting against shock is anti-reverse
Circuit, comprising: DC-DC converter, normally opened relay, normal open switch pipe, resistance, diode and control circuit, the resistance
With the Diode series and the contact both ends of the normally opened relay are connected respectively to, described in the normally opened relay connection
The input terminal of DC-DC converter, the output end of the DC-DC converter are connected to the normal open switch pipe and control electricity
Road, high voltage direct current flows through the resistance and the diode arrives the DC-DC converter again, and the DC-DC converter reaches
It starts to work when operating voltage and output voltage rises, it is described normal after the output voltage of DC-DC converter reaches setting voltage
Open relay closure, and the normally opened relay controls the normal open switch pipe by the control circuit and is closed.
Preferably, the normal open switch pipe is the relay or metal-oxide-semiconductor or IGBT or DC-DC, DC-AC for controlling output voltage
Converter.
Preferably, the normally opened relay is connect with the electrode input end of the DC-DC converter or negative input, institute
State the cathode output end or cathode output end or cathode output end and cathode output end and the normal open switch pipe of DC-DC converter
Connection.
Preferably, the control circuit includes photoelectrical coupler.
Preferably, the control circuit further includes IC or bi-directional voltage stabilizing diode.
Preferably, the control circuit includes triode, and the triode is connect with the normally opened relay.
It preferably, further include DC-DC auxiliary electric power supply.
The control principle of the utility model are as follows: the closure of normally opened relay is the output voltage control by DC-DC converter,
And the signal after the closure of normal open switch pipe is closed by normally opened relay controls, when due to DC-DC converter preliminary work
Normal open switch pipe be it is normally opened, DC-DC converter belong to light condition work, the electric current of the input terminal of DC-DC converter is very small,
Especially under high pressure, therefore resistance voltage difference of the two ends is very small, and the contact both ends pressure difference of such normally opened relay is also very small,
At this moment relay is closed, and relay disconnects when detecting that input voltage or output voltage drop into a certain value when shutdown, output
Also it is turned off, a control period completes.
Compared with prior art, the utility model has the beneficial effects that 1, by relay contact both ends series resistance
And diode, keep resistance voltage difference of the two ends very small, the contact both ends pressure difference of normally opened relay is also very small, it is therefore prevented that contact is beaten
Fire；When accessing high pressure, resistance limits maximum current, it is therefore prevented that the impact of electric current；In input voltage reverse connection, diode electricity
Stream is unable to reverse circulated, prevents reversal connection from causing component damage；2, pass through the normally opened relay of the output voltage control of DC-DC converter
The closure of device, normally opened relay closure after signal control normal open switch pipe closure, circuit structure is simple, and power consumption is smaller.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the embodiment one of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 2 is a kind of structural representation of the embodiment two of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 3 is a kind of structural representation of the embodiment three of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 4 is a kind of structural representation of the example IV of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 5 is a kind of structural representation of the embodiment five of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 6 is a kind of structural representation of the embodiment six of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 7 is a kind of structural representation of the embodiment seven of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 8 is a kind of structural representation of the embodiment eight of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure；
Fig. 9 is a kind of structural representation of the embodiment nine of high voltage DC source protecting against shock reverse-connection preventing circuit of the utility model
Figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical
Novel and its application or any restrictions used.
Embodiment one
Referring to Fig. 1, a kind of high voltage DC source protecting against shock reverse-connection preventing circuit, comprising: DC-DC converter M1, normally opened relay
Device K1, normal open switch pipe K2, resistance R1, diode D1 and control circuit, resistance R1 and diode D1 connect and are separately connected
To the contact both ends of normally opened relay K1, the input terminal of normally opened relay K1 connection DC-DC converter M1, DC-DC converter M1
Output end be connected to normal open switch pipe K2 and control circuit, high voltage direct current flows through resistance R1 and diode D1 arrives DC-DC again
Converter M1, DC-DC converter M1 start to work when reaching operating voltage and output voltage rises, when DC-DC converter M1's
Output voltage reach setting voltage after, normally opened relay K1 closure, and normally opened relay K1 controlled by control circuit it is normally opened
Switching tube K2 closure.
Normally opened relay K1 is connect with the electrode input end VIN+ of DC-DC converter M1, the anode output of DC-DC converter
End Vout+ is connect with normal open switch pipe K2.
Control circuit includes photoelectrical coupler OP1 and IC.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, and connect R1 series connection D1 and be connected to
The VIN+ of M1, M1 output voltage Vout+ connection K2.VIN+ accesses voltage through R1, D1 to M1, and the VIN+ voltage of M1 reaches normal work
M1 works after making voltage, and the Vcc power supply of M1 and Vout+ export positive voltage, and voltage OP1 after IC relatively reaches setting voltage is connected
K1 closure, K1 closure turn off OP2, and K2 closure is connected in Q2.
Embodiment two
As shown in Fig. 2, the present embodiment and embodiment one the difference is that, normally opened relay K1 and DC-DC converter
The negative input VIN- connection of M1.
Embodiment three
As shown in figure 3, the present embodiment and embodiment one the difference is that, the cathode output end of DC-DC converter
Vout- is connect with normal open switch pipe K2.
Example IV
As shown in figure 4, the present embodiment and embodiment one the difference is that, the cathode output end of DC-DC converter
Vout- and cathode output end Vout+ is connect with normal open switch pipe K2.
Embodiment five
As shown in figure 5, the present embodiment and example IV the difference is that, control circuit includes photoelectrical coupler OP1
With bi-directional voltage stabilizing diode Z1.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, and connect R1 series connection D1 and be connected to
The VIN+ of M1, M1 output voltage Vout+ connection K2.VIN+ accesses voltage through R1, D1 to M1, and the VIN+ voltage of M1 reaches normal work
M1 works after making voltage, and the Vcc power supply of M1 and Vout+ export positive voltage, and voltage is greater than OP1 conducting K1 closure after Z1 voltage value,
K1 closure turns off OP2, and K2 closure is connected in Q2.
Embodiment six
As shown in fig. 6, the present embodiment and example IV the difference is that, control circuit includes triode Q1, three poles
Pipe Q1 is connect with normally opened relay K1.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, and connect R1 series connection D1 and be connected to
The VIN+ of M1, M1 output voltage Vout+ connection K2.VIN+ accesses voltage through R1, D1 to M1, and the VIN+ voltage of M1 reaches normal work
M1 works after making voltage, and the Vcc power supply of M1 and Vout+ export positive voltage, and voltage reaches Q1 conducting K1 closure after setting voltage, K1
Closure makes Q2 conducting K2 closure.
Embodiment seven
As shown in fig. 7, the present embodiment and example IV the difference is that, normal open switch pipe K2 be control output voltage
Q3MOSFET and IGBT.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, connection R1 series connection D1 are connected to M1
VIN+, M1 output voltage Vout+ connects Q3 with Vout-.DC-VIN+ accesses voltage through R1, D1 to M1, and the VIN+ voltage of M1 reaches
M1 works after to normal working voltage, and the Vcc power supply of M1 and Vout+ export positive voltage, and voltage relatively reaches setting voltage through IC
K1 closure is connected in Q1 afterwards, and K1 closure makes Q2 conducting Q3 conducting.
Embodiment eight
As shown in figure 8, the present embodiment and example IV the difference is that, normal open switch pipe K2 be control output voltage
M2DC/DC, DC/AC converter.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, connection R1 series connection D1 are connected to M1
VIN+, M1 output voltage Vout+ connects M2 with Vout-.DC-VIN+ accesses voltage through R1, D1 to M1, and the VIN+ voltage of M1 reaches
M1 works after to normal working voltage, and the Vcc power supply of M1 and Vout+ export positive voltage, and voltage relatively reaches setting voltage through IC
K1 closure is connected in Q1 afterwards, and K1 closure makes OP2 output control signal that M2 be made to work.
Embodiment nine
As shown in figure 9, the present embodiment and embodiment eight the difference is that, further include DC-DC auxiliary electric power supply M3.
Specifically, the circuit connection principle of the present embodiment are as follows: the contact VIN+ connection K1 of M1, connection R1 series connection D1 are connected to M1
VIN+, M1 output voltage Vout+ connects M2, M3 (DC/DC auxiliary power supply) with Vout-.DC-VIN+ accesses voltage through R1, D1
To M1, M1 works after the VIN+ voltage of M1 reaches normal working voltage, and the Vout+ of M1 exports positive voltage, and M3 starts to work, when
VCC voltage reaches Q1 conducting K1 closure after setting value, and K1 closure makes OP2 output control signal that M2 be made to start to work.
Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard
For limitations of the present invention, the protection scope of the utility model should be defined by the scope defined by the claims..For
For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several
Improvements and modifications, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (7)
1. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit characterized by comprising DC-DC converter, normally opened relay,
Normal open switch pipe, resistance, diode and control circuit, the resistance and the Diode series are simultaneously connected respectively to described normal
The contact both ends of open relay, the normally opened relay connect the input terminal of the DC-DC converter, the DC-DC converter
Output end be connected to the normal open switch pipe and the control circuit, high voltage direct current flows through the resistance and the diode
The DC-DC converter is arrived again, and the DC-DC converter is started to work when reaching operating voltage and output voltage rises, and works as DC-
After the output voltage of DC converter reaches setting voltage, the normally opened relay closure, and the normally opened relay passes through institute
It states control circuit and controls the normal open switch pipe closure.
2. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that described normally opened to open
The relay or metal-oxide-semiconductor or IGBT or DC-DC, DC-DC converter of Guan Guanwei control output voltage.
3. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that it is described it is normally opened after
Electric appliance is connect with the electrode input end of the DC-DC converter or negative input, the cathode output end of the DC-DC converter
Or cathode output end or cathode output end and cathode output end are connect with the normal open switch pipe.
4. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that the control electricity
Road includes photoelectrical coupler.
5. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that the control electricity
Road further includes IC or bi-directional voltage stabilizing diode.
6. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that the control electricity
Road includes triode, and the triode is connect with the normally opened relay.
7. a kind of high voltage DC source protecting against shock reverse-connection preventing circuit according to claim 1, which is characterized in that further include DC-
DC auxiliary electric power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820875004.8U CN208257656U (en) | 2018-11-05 | 2018-11-05 | A kind of high voltage DC source protecting against shock reverse-connection preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820875004.8U CN208257656U (en) | 2018-11-05 | 2018-11-05 | A kind of high voltage DC source protecting against shock reverse-connection preventing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208257656U true CN208257656U (en) | 2018-12-18 |
Family
ID=64653698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820875004.8U Active CN208257656U (en) | 2018-11-05 | 2018-11-05 | A kind of high voltage DC source protecting against shock reverse-connection preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208257656U (en) |
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2018
- 2018-11-05 CN CN201820875004.8U patent/CN208257656U/en active Active
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