CN208508509U - A kind of VPX cabinet with voltage protection - Google Patents
A kind of VPX cabinet with voltage protection Download PDFInfo
- Publication number
- CN208508509U CN208508509U CN201821186473.5U CN201821186473U CN208508509U CN 208508509 U CN208508509 U CN 208508509U CN 201821186473 U CN201821186473 U CN 201821186473U CN 208508509 U CN208508509 U CN 208508509U
- Authority
- CN
- China
- Prior art keywords
- oxide
- semiconductor
- triode
- metal
- capacitor
- 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.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of VPX cabinet with voltage protection; it include: the control circuit for monitoring supply voltage, the control circuit includes: first resistor, third capacitor, zener diode, the first triode, second resistance, comparator, the second triode, 3rd resistor, external power supply, the first metal-oxide-semiconductor, the 5th resistance and the second metal-oxide-semiconductor；First resistor and third capacitor are connected in series between DC supply input and ground, third capacitor both ends are connected in parallel to zener diode；By the way that control circuit is arranged, monitors the supply voltage of VPX power supply in real time, power supply is cut off in time when if generating over-voltage phenomenon, stops the power supply to VPX, to realize the power supply protection to VPX cabinet；The effect of the control circuit energy starting voltage clamper simultaneously, the precision components being effectively protected in electronic circuit, from the damage of various surge pulses；The control circuit stability is strong, monitors, is quick on the draw at any time.
Description
Technical field
The utility model belongs to VPX cabinet equipment technical field, and in particular to a kind of VPX cabinet with voltage protection.
Background technique
VPX (VME International Trade Association, VME international trade association) system platform, is adopted
With the parallel bus technology of high-speed serial bus technical substitution VME bus.VPX bus introduces current newest universal serial bus
Technology supports higher Gbps.The exchange of VPX core can provide 32 pairs of differential pairs, and each pair of differential pair can theoretically mention
For the data exchange capability of 10Gbps, highest can provide the data exchange capability of 8GByte/s in a VPX Modularity Theory.
Cabinet in VPX system uses VPX power supply, and in case of a failure, the output voltage of power supply is possible to high
In specified value or required value, in the power supply of no protection circuit, output voltage is excessively high may to make power source internal equipment damage,
Cause VPX cabinet equipment not to be available, influences the operation worked normally, therefore design a VPX cabinet with voltage protection
Be very it is necessary to.
Utility model content
To overcome technological deficiency of the existing technology, the utility model discloses a kind of VPX machine with voltage protection
Case monitors power supply voltage in real time, can timely and effectively carry out overvoltage protection to VPX cabinet.
Technical solution adopted by the utility model to solve its technical problems is a kind of VPX cabinet with voltage protection,
It include: the control circuit for monitoring supply voltage, the control circuit includes: first resistor, third capacitor, zener diode, the
One triode, second resistance, comparator, the second triode, 3rd resistor, external power supply, the first metal-oxide-semiconductor, the 5th resistance and
Two metal-oxide-semiconductors；First resistor and third capacitor are connected in series between DC supply input and ground, the both ends parallel connection of third capacitor connects
It is connected to zener diode, first resistor connects the base stage of the first triode, the hair of the first triode with the common end of third capacitor
Emitter-base bandgap grading is grounded by second resistance, and the collector of the first triode connects external power supply, and the emitter of the first triode is also connected with
The power end of the non-inverting input terminal of comparator, the external reference voltage of the inverting input terminal of comparator, comparator connects external power supply,
The ground terminal of comparator is grounded, and the output end of comparator connects the base stage of the second triode, and the emitter of the second triode is grounded,
The collector of second triode connects external power supply by 3rd resistor, and the collector of the second triode connects the first metal-oxide-semiconductor
The source electrode of grid, the grounded drain of the first metal-oxide-semiconductor, the first metal-oxide-semiconductor connects external power supply by the 5th resistance, the first metal-oxide-semiconductor
Source electrode is also connected with the grid of the second metal-oxide-semiconductor, and the drain electrode of the second metal-oxide-semiconductor connects DC supply input, and the source electrode of the second metal-oxide-semiconductor is
Power output end is load supplying.
Preferably, the DC supply input of the control circuit is also connected with ac-dc converter circuit, the alternating current-direct current
Conversion circuit includes: AC power source, first capacitor, first diode, the second diode and the second capacitor；The AC power source is logical
The cathode of first capacitor connection first diode, the plus earth of first diode are crossed, the cathode of first diode is also connected with the
The anode of two diodes, the cathode of the second diode also pass through the second capacity earth, and the cathode of the second diode is DC power supply
Input terminal.
Preferably, the 4th electricity is also connected in series between the collector of second triode and the grid of the first metal-oxide-semiconductor
Resistance.
Preferably, the 4th capacitor is also connected in series between the grid and ground of first metal-oxide-semiconductor.
Preferably, the chip model of the comparator is LM193.
The beneficial effects of the utility model are: the supply voltage of VPX power supply is monitored in real time by setting control circuit, if
Power supply is cut off in time when generating over-voltage phenomenon, stops the power supply to VPX, to realize the power supply protection to VPX cabinet；
The effect of the control circuit energy starting voltage clamper simultaneously, the precision components being effectively protected in electronic circuit, from various waves
Gush the damage of pulse；The control circuit stability is strong, monitors, is quick on the draw at any time.
Detailed description of the invention
Fig. 1 is the circuit diagram of control circuit described in the utility model.
Appended drawing reference: AC- AC power source, C1- first capacitor, D1- first diode, the second diode of D2-, C2- second
Capacitor, R1- first resistor, C3- third capacitor, DW- zener diode, the first triode of T1-, R2- second resistance, U- compare
Device, U0- reference voltage, the second triode of T2-, R3- 3rd resistor, VCC- external power supply, the 4th resistance of R4-, the 4th electricity of C4-
Hold, the first metal-oxide-semiconductor of Q1-, the 5th resistance of R5-, the second metal-oxide-semiconductor of Q2-, OUT- power output end.
Specific embodiment
More detailed description is done to the embodiments of the present invention below in conjunction with attached drawing and appended drawing reference, makes to be familiar with ability
The technology people in domain can implement accordingly after studying this specification carefully.It should be appreciated that specific embodiment described herein is only to solve
The utility model is released, is not used to limit the utility model.
A kind of VPX cabinet with voltage protection, comprising: monitor the control circuit of supply voltage, the control circuit packet
It includes: first resistor R1, third capacitor C3, zener diode DW, the first triode T1, second resistance R2, comparator U, the two or three
Pole pipe T2,3rd resistor R3, external power supply VCC, the first metal-oxide-semiconductor Q1, the 5th resistance R5 and the second metal-oxide-semiconductor Q2；DC power supply is defeated
Enter to be connected in series with first resistor R1 and third capacitor C3 between end and ground, the both ends third capacitor C3 are connected in parallel to two pole of pressure stabilizing
Pipe DW, first resistor R1 connect the base stage of the first triode T1, the transmitting of the first triode T1 with the common end of third capacitor C3
Pole is grounded by second resistance R2, and the collector of the first triode T1 connects external power supply VCC, the emitter of the first triode T1
It is also connected with the non-inverting input terminal of comparator U, the power end of the inverting input terminal of comparator U external reference voltage U0, comparator U connect
External power supply VCC is met, the ground terminal of comparator U is grounded, the base stage of the second triode T2 of output end connection of comparator U, and second
The emitter of triode T2 is grounded, and the collector of the second triode T2 is by 3rd resistor R3 connection external power supply VCC, and the two or three
The collector of pole pipe T2 connects the grid of the first metal-oxide-semiconductor Q1, and the source electrode of the grounded drain of the first metal-oxide-semiconductor Q1, the first metal-oxide-semiconductor Q1 is logical
The 5th resistance R5 connection external power supply VCC is crossed, the source electrode of the first metal-oxide-semiconductor Q1 is also connected with the grid of the second metal-oxide-semiconductor Q2, the 2nd MOS
The drain electrode of pipe Q2 connects DC supply input, and it is load supplying that the source electrode of the second metal-oxide-semiconductor Q2, which is power output end OUT,；Specifically
Ground,
DC supply input is voltage input end, and input voltage the first triode T1 and second resistance R2 by being made of
Voltage follower enter the non-inverting input terminal of comparator U, the reference voltage U0 of input voltage and comparator U inverting input terminal into
Row compares, and reference voltage U0 is the voltage threshold of overvoltage protection；
If being at this time overvoltage condition, input voltage value is greater than reference voltage U0 value, then comparator U output high level, second
Triode T2 is NPN type triode, and NPN type triode receives high level conducting, due to the ground connection of the second triode T2, first
The grid voltage of metal-oxide-semiconductor Q1 is pulled low, and the first metal-oxide-semiconductor Q1 is PMOS tube, and the grid voltage of PMOS tube receives low level after dragging down
Signal conduction, the second metal-oxide-semiconductor Q2 be NMOS tube, at this time the grid voltage of the second metal-oxide-semiconductor Q2 due to the first metal-oxide-semiconductor Q1 conducting and
It drags down, the second metal-oxide-semiconductor Q2 receives low level signal cut-off, disconnects power supply of the power supply to load at this time, realizes over-voltage to VPX cabinet
Protection；
When if voltage normal condition, input voltage value is less than reference voltage U0 value, and comparator U exports low level letter at this time
Number, the second triode T2 receives low level signal cut-off at this time, and the grid of the first metal-oxide-semiconductor Q1 receives external power supply VCC's at this time
High voltage signal cut-off, the second metal-oxide-semiconductor Q2 receive the high voltage signal conducting of external power supply VCC, and power supply is VPX to load at this time
Cabinet normal power supply；
The effect of first resistor R1 and zener diode DW starting voltage clamper, the precision member being effectively protected in electronic circuit
Device, from the damage of various surge pulses；3rd resistor R3 and the 5th resistance R5 is current-limiting resistance；External power supply value VCC etc.
In the crest voltage of DC supply input.
The DC supply input of the control circuit is also connected with ac-dc converter circuit, the ac-dc converter circuit
It include: AC power source AC, first capacitor C1, first diode D1, the second diode D2 and the second capacitor C2；The AC power source
Cathode of the AC by first capacitor C1 connection first diode D1, the plus earth of first diode D1, first diode D1's
Cathode is also connected with the anode of the second diode D2, and the cathode of the second diode D2 also passes through the second capacitor C2 ground connection, the two or two pole
The cathode of pipe D2 is DC supply input；The first capacitor C1 is the effect for being depressured current limliting, and partial pressure reduces AC power source AC
The exchange level of output, for the devices such as the lower triode of rated power supply, comparator and metal-oxide-semiconductor use, first diode D1 and
Second diode D2 is rectifier diode, and enemy's capacitor C2 is filter capacitor, is used for smooth direct current output ripple.
The 4th resistance is also connected in series between the collector of the second triode T2 and the grid of the first metal-oxide-semiconductor Q1
R4；The 4th resistance R4 is current-limiting resistance, improves circuit stability.
The 4th capacitor C4 is also connected in series between the grid and ground of the first metal-oxide-semiconductor Q1；The 4th capacitor C4 is used
In the grid voltage for stablizing the first metal-oxide-semiconductor Q1.
The chip model of the comparator U is LM193；LM193 has the advantages of low-power consumption, high sensitivity.
The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize
Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field
For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical
In novel protection scope.
Claims (5)
1. a kind of VPX cabinet with voltage protection, it is characterised in that: include: the control circuit for monitoring supply voltage, the control
Circuit processed includes: first resistor (R1), third capacitor (C3), zener diode (DW), the first triode (T1), second resistance
(R2), comparator (U), the second triode (T2), 3rd resistor (R3), external power supply (VCC), the first metal-oxide-semiconductor (Q1), the 5th electricity
Hinder (R5) and the second metal-oxide-semiconductor (Q2)；First resistor (R1) and third capacitor are connected in series between DC supply input and ground
(C3), the both ends third capacitor (C3) are connected in parallel to zener diode (DW), the public affairs of first resistor (R1) and third capacitor (C3)
The emitter of the base stage of end connection the first triode (T1) altogether, the first triode (T1) is grounded by second resistance (R2), and first
The collector of triode (T1) connects external power supply (VCC), and the emitter of the first triode (T1) is also connected with the same of comparator (U)
The power end of phase input terminal, the external reference voltage of inverting input terminal (U0) of comparator (U), comparator (U) connects external power supply
(VCC), the ground terminal ground connection of comparator (U), the base stage of the output end connection the second triode (T2) of comparator (U), the two or three
The emitter of pole pipe (T2) is grounded, and the collector of the second triode (T2) connects external power supply (VCC) by 3rd resistor (R3),
The grid of the collector connection the first metal-oxide-semiconductor (Q1) of second triode (T2), the grounded drain of the first metal-oxide-semiconductor (Q1), the first MOS
The source electrode of (Q1) is managed by the 5th resistance (R5) connection external power supply (VCC), the source electrode of the first metal-oxide-semiconductor (Q1) is also connected with second
The grid of metal-oxide-semiconductor (Q2), the drain electrode of the second metal-oxide-semiconductor (Q2) connect DC supply input, and the source electrode of the second metal-oxide-semiconductor (Q2) is electricity
Source output terminal (OUT) is load supplying.
2. a kind of VPX cabinet with voltage protection as described in claim 1, it is characterised in that: the control circuit it is straight
Stream power input is also connected with ac-dc converter circuit, and the ac-dc converter circuit includes: AC power source (AC), the first electricity
Hold (C1), first diode (D1), the second diode (D2) and the second capacitor (C2)；The AC power source (AC) passes through the first electricity
Hold the cathode of (C1) connection first diode (D1), the plus earth of first diode (D1), the cathode of first diode (D1)
It is also connected with the anode of the second diode (D2), the cathode of the second diode (D2) also passes through the second capacitor (C2) and is grounded, and the two or two
The cathode of pole pipe (D2) is DC supply input.
3. a kind of VPX cabinet with voltage protection as described in claim 1, it is characterised in that: second triode
(T2) the 4th resistance (R4) is also connected in series between the grid of collector and the first metal-oxide-semiconductor (Q1).
4. a kind of VPX cabinet with voltage protection as claimed in claim 3, it is characterised in that: first metal-oxide-semiconductor (Q1)
Grid and ground between be also connected in series with the 4th capacitor (C4).
5. a kind of VPX cabinet with voltage protection as described in claim 1, it is characterised in that: the core of the comparator (U)
Piece model LM193.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821186473.5U CN208508509U (en) | 2018-07-25 | 2018-07-25 | A kind of VPX cabinet with voltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821186473.5U CN208508509U (en) | 2018-07-25 | 2018-07-25 | A kind of VPX cabinet with voltage protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208508509U true CN208508509U (en) | 2019-02-15 |
Family
ID=65290486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821186473.5U Active CN208508509U (en) | 2018-07-25 | 2018-07-25 | A kind of VPX cabinet with voltage protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208508509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688426A (en) * | 2020-12-15 | 2021-04-20 | 重庆电子工程职业学院 | Timing monitoring circuit for Internet of things |
-
2018
- 2018-07-25 CN CN201821186473.5U patent/CN208508509U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688426A (en) * | 2020-12-15 | 2021-04-20 | 重庆电子工程职业学院 | Timing monitoring circuit for Internet of things |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102628889A (en) | Voltage sampling circuit | |
| CN201797312U (en) | Network port circuit of Ethernet power supply device | |
| CN101867168A (en) | Power protecting circuit and LED lamp | |
| CN208924207U (en) | A kind of digital simulation multiplexing input detecting circuit | |
| CN104167724B (en) | A kind of isolation type bidirectional signal of communication lightning protection device | |
| CN202503261U (en) | Protective device of input voltage fluctuation | |
| CN206389350U (en) | A kind of light-coupled isolation communicating circuit | |
| CN208508509U (en) | A kind of VPX cabinet with voltage protection | |
| CN106021166B (en) | Multi-host communication circuit based on RS485 bus | |
| CN203101558U (en) | Fault screening device for electric equipment | |
| CN204731307U (en) | AC voltage detection circuit | |
| CN105391320B (en) | Polyphase source circuit | |
| CN104360097A (en) | Rotating speed signal conditioning and isolation module | |
| CN203941243U (en) | A kind of three-phase electric power open phase testing circuit | |
| CN205864444U (en) | The POE detection output circuit of a kind of WIFI equipment and WIFI equipment | |
| CN106786391B (en) | Switch power over-voltage protection circuit and Switching Power Supply | |
| CN210693431U (en) | Simple, practical and automatic-recovery input overvoltage protection circuit | |
| CN205693558U (en) | A kind of output overvoltage protection circuit and Switching Power Supply | |
| CN204559106U (en) | A kind of convertible frequency air-conditioner and electrolytic capacitor overvoltage crowbar thereof | |
| CN209056923U (en) | Switching power circuit | |
| CN204681075U (en) | Power-down protection circuit | |
| CN210037954U (en) | Power supply voltage overvoltage and undervoltage protection indicating circuit | |
| CN110011290B (en) | Ethernet interface anti-surge circuit | |
| CN208046223U (en) | DC power supply and its output protection circuit | |
| CN207853474U (en) | A kind of energy saver absorbing mains by harmonics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |