CN206389097U - A kind of circuit protection device and powersupply system circuit - Google Patents
A kind of circuit protection device and powersupply system circuit Download PDFInfo
- Publication number
- CN206389097U CN206389097U CN201621272170.6U CN201621272170U CN206389097U CN 206389097 U CN206389097 U CN 206389097U CN 201621272170 U CN201621272170 U CN 201621272170U CN 206389097 U CN206389097 U CN 206389097U
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- China
- Prior art keywords
- circuit
- protection device
- load
- circuit protection
- super capacitor
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- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
A kind of circuit protection device and powersupply system circuit disclosed in the present application; wherein circuit protection device includes DC/DC converters, super capacitor; voltage stabilizing overload protecting circuit; super capacitor is connected in parallel on DC/DC converter output ends; voltage stabilizing overload protecting circuit is connected in parallel with super capacitor again, and the DC/DC converters include DC/AC converting units, transformer and AC/DC converting units.After the protective tube fuse failure for causing series connection is broken down in load, the electric energy stored using super capacitor, the rated voltage of load is continued to output by DC/DC converters, so as in load short circuits or failure, avoid chaser accident caused by voltage dip, simultaneously, DC/DC converters are made up of DC/AC converting units, transformer and AC/DC converting units, so that the load circuit where each load is mutually isolated, avoid when short circuit or failure occur for a certain load, protective tube fuse failure causes other load circuits to occur chaser accident caused by voltage dip.Disclosed herein as well is a kind of powersupply system circuit, with foregoing circuit protection device identical technique effect.
Description
Technical field
The utility model is related to circuit protection technical field, more particularly to a kind of circuit protection device and powersupply system
Circuit.
Background technology
The equipment such as controller, I/O modules, the telecommunications modules of computer control system (DCS or PLC) are powered frequently with direct current
Power supply, voltage class has 12V, 24V, 48V etc., wherein, it is the most frequently used for 24V, to ensure reliability that power supply is powered, set up meter
Redundancy electric power supply system is realized by the coupling of two poles into two-way 24V power supplys, as shown in Figure 1.
The shortcoming of this power supply is that, when short circuit or overload fault occur for certain load-side, fuse Fn fusing needs certain
Time, the decline of busbar voltage can be caused during this, if busbar voltage decrease beyond certain value, time more than a timing,
Controller can be caused to restart, the failure such as I/O fixture block sampling distortions, this failure can cause false protection chaser.Existing multiple electricity
Factory is due to certain fastener short trouble, and cause reduces excessive and cause chaser false tripping under some rack 24VDC power supply transient voltages
Accident.
Therefore, how when short circuit or overload fault occur for load, it is that those skilled in the art need solution to prevent chaser
Technical problem.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of circuit protection device and powersupply system circuit,
With when short circuit or overload fault occur for load, the technique effect of chaser is prevented.Its concrete scheme is as follows：
A kind of circuit protection device, including DC/DC converters, super capacitor, voltage stabilizing overload protecting circuit, the super electricity
Appearance is connected in parallel on the DC/DC converter output ends, and the voltage stabilizing overload protecting circuit is connected in parallel with the super capacitor, its
In, the DC/DC converters include DC/AC converting units, transformer and AC/DC converting units.
It is preferred that, the circuit protection device also includes the indicator lamp for being used to remind overload.
It is preferred that, the circuit protection device also includes the SR for being used to be resetted, wherein, the SR
Including manual reset button and push button.
It is preferred that, the voltage stabilizing overload protecting circuit includes the adjustment element of adjustment output signal, for according to information carrying excessively
Number carry out the protection circuit of voltage limitation, the sample circuit for obtaining sampled signal, reference power supply, for the sampling to be believed
Number comparison amplifying circuit being compared and enlarged with the reference power supply.
It is preferred that, the transformer is coupling transformer.
Circuit protection device disclosed in the utility model, including DC/DC converters, super capacitor, voltage stabilizing overload protection electricity
Road, the super capacitor is connected in parallel on the DC/DC converter output ends, the voltage stabilizing overload protecting circuit and the super capacitor
It is connected in parallel, wherein, the DC/DC converters include DC/AC converting units, transformer and AC/DC converting units.Work as load
Break down after the protective tube fuse failure for causing to be connected before the circuit protection device input, the electricity stored using super capacitor
Can, the rated voltage of load is continued to output by DC/DC converters, so that in load short circuits or failure, it is to avoid voltage is rapid
Chaser accident caused by drop, meanwhile, DC/DC converters are made up of DC/AC converting units, transformer and AC/DC converting units,
So that the load circuit where each load is mutually isolated, it is to avoid when short circuit or failure occur for a certain load, protective tube melts
Silk fusing causes other load circuits to occur chaser accident caused by voltage dip.
The invention also discloses a kind of powersupply system circuit, including input power, load and be connected on described
Diode and protective tube between input power and the load, in addition to the circuit protection device described in any of the above-described, its
In, between the circuit protection device series connection and the protective tube and the load, with identical with foregoing circuit protection device
Technique effect.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is the connection diagram of powersupply system circuit of the prior art；
Fig. 2 is a kind of module diagram of circuit protection device disclosed in the utility model embodiment；
Fig. 3 is voltage stabilizing overload protecting circuit in a kind of specific circuit protection device disclosed in the utility model embodiment
Module connection diagram；
Fig. 4 is a kind of connection diagram of powersupply system circuit disclosed in the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Shown in Figure 2, this practical information discloses a kind of circuit protection device, including DC/DC converters 11, super
Electric capacity 12, voltage stabilizing overload protecting circuit 13, super capacitor is connected in parallel on DC/DC converter output ends, voltage stabilizing overload protecting circuit with
Super capacitor is connected in parallel, wherein, above-mentioned DC/DC converters 11 include DC/AC converting units 111, transformer 112 and AC/DC
Converting unit 113.Because circuit protection device is mainly protected to load, therefore, super capacitor is connected in parallel on DC/DC converters
Output end is common knowledge, is repeated no more again.
The AC power that the DC/AC converting units of input convert direct current into high frequency by high-frequency chopper is defeated
Go out to transformer coupled isolation and direct current output is converted into by output terminals A C/DC converting units again, because AC power is height
Frequency power, the efficiency high of conveying electric energy, therefore the volume very little of transformer.It is understood that transformer it is also possible to use single-phase change
Depressor.
AC/DC converting units are in parallel with super capacitor, to store certain electric energy.In practical operation, it can be needed by user
The capacity of super capacitor is determined, for example, super capacitor needs to provide the rated voltage of 1 second for load, i.e. super capacitor storage
Have can supply the nominal load voltage of 1 second, when connect with circuit protection device input protective tube fusing, protective tube melt
Silk fusing time≤200 millisecond, in this fuse blowing process, dc bus has≤200 milliseconds of voltages to decline phenomenon, i.e. circuit
The input voltage of protection device input declines without disappearing at once, but due to there is the energy storage of super capacitor, can guarantee that 1 second
Reliable power supply, this fluctuation that can be prevented effectively from DC bus-bar voltage causes the failure of control system.
The approximate formula of super capacitor capacity at work：Energy=super capacitor reduces energy needed for keeping
Energy needed for during holding
Electrochemical capacitance reduces energy
Wherein, I is operating current, and t holds time, and C is the capacity of electric capacity.
For example, the voltage exported through stabilizing circuit is 24V, and electric current 1A, the capacity of electric capacity is 0.25 farad.Stabilizing circuit is defeated
The operating voltage range for entering end is 36V~27V, and super capacitor can provide all amounts of electric energy of 1 second, substitute into upper two formula：
It can be seen that, after the protective tube fuse failure for causing to be connected before the circuit protection device input is broken down in load,
The electric energy stored using super capacitor, the rated voltage of load is continued to output by DC/DC converters, thus in load short circuits or
During failure, it is to avoid chaser accident caused by voltage dip, meanwhile, DC/DC converters by DC/AC converting units, transformer and
AC/DC converting units are constituted so that the load circuit where each load is mutually isolated, it is to avoid occur short circuit in a certain load
Or during failure, protective tube fuse failure causes other load circuits to occur chaser accident caused by voltage dip.
In one embodiment, shown in Figure 3, above-mentioned voltage stabilizing overload protecting circuit includes the tune of adjustment output signal
Whole element, the protection circuit for carrying out voltage limitation according to overload signal, the sample circuit for obtaining sampled signal, benchmark
Power supply, the comparison amplifying circuit for above-mentioned sampled signal and said reference power supply to be compared and enlarged.
It is understood that in order to obtain more intuitive effect, circuit protection device also includes the finger for being used to remind overload
Show lamp, red is indicated during output overloading, be green when normal.
Circuit protection device disclosed in the embodiment of the present invention also includes the SR for being used to be resetted, wherein, it is above-mentioned
SR includes one or both of manual reset button and push button.
In another specific embodiment, SR includes manual reset button and push button.It is multiple manually
Position button only has depressed action after failture evacuation, and circuit could recover normal output.After push button is pressed, electricity
Sub-loop periodically automatically resets, such as is once resetted within every 1 second, recover normal power supply if failure has disappeared, if failure
Still suffer from, be then again introduced into guard mode.
It is shown in Figure 4 the invention also discloses a kind of powersupply system circuit, including A roads and the input of B roads
The cathode output end of power supply, A roads and B roads input power is distinguished after series diode D1 and D2, then connected with protective tube Fn, passes through
Connect after the circuit protection device n connected accordingly with load n, n is positive integer more than 0, can be with using circuit protection device
The characteristics of isolating respective load and protective tube so that the powersupply system circuit has and circuit protection device phase above
Same technique effect, i.e., when short circuit or overload fault occur for load, can effectively prevent chaser accident.
The foregoing description of the disclosed embodiments, enables those skilled in the art to realize or use the utility model.
A variety of modifications to these embodiments will be apparent for a person skilled in the art, general original as defined herein
Reason can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Therefore, this practicality is new
Type is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase
Consistent most wide scope.
Claims (6)
1. a kind of circuit protection device, it is characterised in that including DC/DC converters, super capacitor, voltage stabilizing overload protecting circuit,
The super capacitor is connected in parallel on the DC/DC converter output ends, and the voltage stabilizing overload protecting circuit and the super capacitor are simultaneously
Connection connection, wherein, the DC/DC converters include DC/AC converting units, transformer and AC/DC converting units.
2. circuit protection device according to claim 1, it is characterised in that also including the indicator lamp for reminding overload.
3. circuit protection device according to claim 2, it is characterised in that also including for the circuit protection device
The SR resetted, wherein, the SR includes manual reset button and push button.
4. circuit protection device according to claim 3, it is characterised in that the voltage stabilizing overload protecting circuit includes adjustment
The adjustment element of output signal, for according to overload signal carry out voltage limitation protection circuit, for obtaining sampled signal
Sample circuit, reference power supply, the comparison amplifying circuit for the sampled signal and the reference power supply to be compared and enlarged.
5. circuit protection device according to claim 4, it is characterised in that the transformer is coupling transformer.
6. a kind of powersupply system circuit, including input power, load and be connected on the input power and the load it
Between diode and protective tube, it is characterised in that also including the circuit protection device described in claim any one of 1-5, wherein,
Between the circuit protection device series connection and the protective tube and the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621272170.6U CN206389097U (en) | 2016-11-24 | 2016-11-24 | A kind of circuit protection device and powersupply system circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621272170.6U CN206389097U (en) | 2016-11-24 | 2016-11-24 | A kind of circuit protection device and powersupply system circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206389097U true CN206389097U (en) | 2017-08-08 |
Family
ID=59486813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621272170.6U Expired - Fee Related CN206389097U (en) | 2016-11-24 | 2016-11-24 | A kind of circuit protection device and powersupply system circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206389097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111384707A (en) * | 2018-12-28 | 2020-07-07 | 中核核电运行管理有限公司 | Supplementary trip device and method for ultrahigh-voltage combined switching station of nuclear power plant |
-
2016
- 2016-11-24 CN CN201621272170.6U patent/CN206389097U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111384707A (en) * | 2018-12-28 | 2020-07-07 | 中核核电运行管理有限公司 | Supplementary trip device and method for ultrahigh-voltage combined switching station of nuclear power plant |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170808 |