CN206432691U - Over-pressure safety device and electric power system - Google Patents
Over-pressure safety device and electric power system Download PDFInfo
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- CN206432691U CN206432691U CN201720162342.2U CN201720162342U CN206432691U CN 206432691 U CN206432691 U CN 206432691U CN 201720162342 U CN201720162342 U CN 201720162342U CN 206432691 U CN206432691 U CN 206432691U
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Abstract
The utility model provides a kind of over-pressure safety device and electric power system, is related to the technical field of safe power supply, effectively can protect transmission line of electricity when occurring overvoltage, improve the security of transmission line of electricity.The over-pressure safety device, including induction coil, rectification circuit and protection chip；The induction coil is used for the secondary iron core for being wrapped in transformer, and produces alternating current impression signal；The rectification circuit is connected between the induction coil and the protection chip, and the alternating current impression signal rectification is direct current induced signal by the rectification circuit；The protection chip receives the direct current induced signal, and when the direct current induced signal exceeds preset value, the protection chip exports power-off signal.
Description
Technical field
The utility model is related to safe power supply technical field, is more particularly, to a kind of over-pressure safety device and power supply
System.
Background technology
With the development of power technology, industrial-frequency alternating current (i.e. civil power) has spread all over each family and unit, electricity consumption
Security also becomes more and more important.
Current civil power is generally powered by two output lines, wherein one is live wire, another is zero line, live wire and zero line
Between voltage be line voltage.In actual power supply process, it is impossible to be completely secured and worked under rated voltage, but
An operated within range near rated voltage.If output voltage is higher by the 15% of rated voltage, generally just it was identified as
Press phenomenon.Zero line is stolen, ageing equipment, technical failure, man-made fault, natural calamity, the reason such as send a telegram here again that has a power failure are likely to
Cause over-pressed phenomenon, overvoltage can use electric equipment to generate heat, puncture, burn out, or even cause fire, therefore it is ten to take precautions against over-pressed phenomenon
Divide necessary.
Current overvoltage protector is typically using modes such as air switch or relays, to the electricity of the outlet line of civil power
Pressure is monitored.When the voltage of outlet line is excessive, using the mode such as air switch or relay disconnection, outlet line is cut off
Power supply, to realize the protection of circuit and electrical equipment.But, the sensitivity of existing overvoltage protector is relatively low, is occurring
Effectively circuit can not be protected during pressure.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of over-pressure safety device and electric power system, Neng Gou
Generation effectively protects transmission line of electricity when over-pressed, improves the security of transmission line of electricity.
In a first aspect, the utility model embodiment provides a kind of over-pressure safety device, including induction coil, rectification circuit
With protection chip；
The induction coil is used for the secondary iron core for being wrapped in transformer, and produces alternating current impression signal；
The rectification circuit is connected between the induction coil and the protection chip, and the rectification circuit is handed over described
The rectification of influenza induction signal is direct current induced signal；
The protection chip receives the direct current induced signal, described when the direct current induced signal exceeds preset value
Protect chip output power-off signal.
With reference in a first aspect, the utility model embodiment provide first aspect the first possible embodiment, its
In, the rectification circuit is rectifier bridge.
With reference in a first aspect, the utility model embodiment provide first aspect second of possible embodiment, its
In, the over-pressure safety device also includes the filter circuit being connected between the rectification circuit and the protection chip and amplification electricity
Road.
With reference in a first aspect, the utility model embodiment provide first aspect the third possible embodiment, its
In, the protection chip includes comparing unit and trigger element；
The comparing unit receives the direct current induced signal, and the direct current induced signal and the preset value are carried out
Compare；
When the direct current induced signal exceeds preset value, the trigger element exports power-off signal.
With reference in a first aspect, the utility model embodiment provide first aspect the 4th kind of possible embodiment, its
In, multistable trigger is provided with the trigger element；
When the direct current induced signal exceeds preset value, the multistable trigger exports power-off signal.
Second aspect, the utility model embodiment also provides a kind of electric power system, including transformer and above-mentioned overvoltage
Protection device；
The primary coil connection power network of the transformer, secondary coil connection ac output end；
Induction coil in the over-pressure safety device is wrapped in the secondary iron core of transformer.
With reference to second aspect, the utility model embodiment provides the first possible embodiment of second aspect, its
In, the electric power system also includes the first relay；
The output end of the protection chip connects the control end of first relay.
With reference to second aspect, the utility model embodiment provides second of possible embodiment of second aspect, its
In, the first output end of the protection chip connects the control coil of first relay by bidirectional triode thyristor；
Second output end of the protection chip connects the control end of the bidirectional triode thyristor by current-limiting resistance.
With reference to second aspect, the utility model embodiment provides the third possible embodiment of second aspect, its
In, the electric power system also includes the second relay；
The output end of first relay is connected with the control coil of second relay, second relay
Output end is connected with the primary coil.
With reference to second aspect, the utility model embodiment provides the 4th kind of possible embodiment of second aspect, its
In, first relay is closed type relay, and second relay is normal-open type relay.
The utility model embodiment brings following beneficial effect：
In the over-pressure safety device that the utility model embodiment is provided, including induction coil, rectification circuit and protection chip.
Wherein, induction coil is used for the secondary iron core for being wrapped in transformer, passes through the changes of magnetic field feelings of the primary iron core of sensor transformer
Condition, produces alternating current impression signal.Rectification circuit is connected between induction coil and protection chip, for alternating current impression signal is whole
Flow for direct current induced signal.Protect chip to receive direct current induced signal, when direct current induced signal exceeds preset value, protect chip
Power-off signal is exported, the power supply of transmission line of electricity is disconnected.The over-pressure safety device that the utility model embodiment is provided, utilizes the line of induction
Enclose and electromagnetic induction carried out to the primary iron core of transformer, and using the size of current of the induction coil as overvoltage protection condition,
Therefore, it is possible to improve the sensitivity of circuit protection, more efficient protection transmission line of electricity, so as to improve the security of transmission line of electricity.
Other feature and advantage of the present utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are in explanation
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Coordinate appended accompanying drawing, be described in detail below.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram for the over-pressure safety device that the utility model embodiment one is provided；
Fig. 2 is the schematic diagram for the over-pressure safety device that the utility model embodiment one is provided；
Fig. 3 is the schematic diagram of protection chip in the over-pressure safety device that the utility model embodiment one is provided；
Fig. 4 is the schematic diagram for the electric power system that the utility model embodiment two is provided.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this
The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of the utility model protection.
Current overvoltage protector is typically using modes such as air switch or relays, to the electricity of the outlet line of civil power
Pressure is monitored.When the voltage of outlet line is excessive, using the mode such as air switch or relay disconnection, outlet line is cut off
Power supply, to realize the protection of circuit and electrical equipment.But, the sensitivity of existing overvoltage protector is relatively low, is occurring
Effectively circuit can not be protected during pressure.
Based on this, the purpose of this utility model is to provide a kind of over-pressure safety device and electric power system, can be in hair
Transmission line of electricity effectively is protected during raw overvoltage, the security of transmission line of electricity is improved.
Embodiment one：
The utility model embodiment provides a kind of over-pressure safety device, can be applied to the power supply field such as family, office, factory
Scape.As depicted in figs. 1 and 2, the over-pressure safety device includes induction coil L1, rectification circuit and protection chip.
Wherein, induction coil is used for the secondary iron core for being wrapped in transformer, passes through the magnetic of the primary iron core of sensor transformer
Field situation of change, produces alternating current impression signal.Rectification circuit is connected between induction coil L1 and protection chip, for that will sense
The alternating current impression signal rectification that coil L1 is sensed is direct current induced signal.Protect chip to receive direct current induced signal, work as direct current
When induced signal exceeds preset value, protection chip output power-off signal disconnects the power supply of transmission line of electricity.
The over-pressure safety device that the utility model embodiment is provided, is entered using induction coil L1 to the primary iron core of transformer
Row electromagnetic induction, and using induction coil L1 size of current as overvoltage protection condition, therefore, it is possible to provide circuit protection
Sensitivity, more efficient protection transmission line of electricity, so as to improve the security of transmission line of electricity.
In the present embodiment, rectification circuit is realized in the form of rectifier bridge, rectifier bridge specifically by four diode D1, D2,
D3, D4 are constituted in the way of bridge-type is connected.By setting rectifier bridge, you can realize the alternating current impression sensed to induction coil L1
Signal carries out rectification, and shape is periodically direct current induced signal.
The utility model embodiment provide over-pressure safety device in, in addition to be connected to rectification circuit with protection chip it
Between filter circuit.Filter circuit is made up of two filter capacitors C1, C2 and filter resistance R1, by filter capacitor C1, C2 with
And filter resistance R1 is filtered to direct current induced signal, the voltage of direct current induced signal is set to limit within limits.
In addition, the output end of filter circuit also protects power end V+, V- of chip by connecting, electricity is provided for protection chip
Source.
Further, in the over-pressure safety device that the utility model embodiment is provided, in addition to filter circuit and guarantor are connected to
The amplifying circuit protected between chip.Amplifying circuit is mainly made up of the first variable resistor W1 and PNP type triode T1, direct current sensing
Signal can generate larger current signal by triode T1 amplification, and the current signal is converted to after resistance R3
Induced voltage signal, and input the first input end a1 of protection chip.The voltage-regulator diode D5 connected with the first variable resistor W1
With resistance R2, voltage stabilizing and the effect of current limliting are each served as.
In addition, also including the second adjustable resistance W2 in the amplifying circuit, the second adjustable resistance W2, which is used to sense direct current, to be believed
Number be converted to reference voltage signal, the second input a2 of input protection chip.
In the present embodiment, variable resistor W1, W2 resistance can be adjusted 0 between 5.1k Ω, variable resistor W1, W2 tool
Setting can be adjusted according to the voltage of application scenarios, current conditions when dispatching from the factory in the resistance of body.
Protection chip is mainly monitored to the first input end a1 induced voltage signals received, and according to induced voltage
The change output power-off signal of signal.Meanwhile, the reference voltage signal that protection chip can also be received to the second input a2
It is monitored, power-off signal can also be exported when reference voltage signal occurs abnormal.
As shown in figure 3, specifically including comparing unit and trigger element in protection chip in the present embodiment.Comparing unit connects
Receive direct current induced signal (i.e. induced voltage signal and reference voltage signal), and by induced voltage signal and reference voltage signal and
Corresponding preset value is compared.When induced voltage signal exceeds corresponding preset value, or reference voltage signal beyond phase
During corresponding preset value, trigger element will export power-off signal, disconnect the power supply of transmission line of electricity.
As a preferred scheme, multistable trigger is provided with trigger element, when direct current induced signal is beyond default
During value, multistable trigger output power-off signal.Multistable trigger is also referred to as n steady state triggers, is entering for bistable state tentaculum
One step develops.If having dc-couple between the input of every one-level of n amplifying stage and remaining output end at different levels, certain
N stable state is can obtain under bar, and there was only one-level conducting in each stable state, and remaining is turned off.In nonbinary meter
In number circuit, the quick response under a variety of different conditions can be realized using polymorphic trigger, therefore than flip and flop generator
Response speed is faster.
By using with highly sensitive comparing unit and trigger element in the utility model embodiment, and in triggering
Multistable trigger is set in unit, protection chip was responded within 0.1 second, is supplied so as to be disconnected within the extremely short time
Power supply, effectively protection electrical equipment and supply line.
The over-pressure safety device that the utility model embodiment is provided, is entered using induction coil L1 to the primary iron core of transformer
Row electromagnetic induction, and using induction coil L1 size of current as overvoltage protection condition, therefore, it is possible to provide circuit protection
Sensitivity, more efficient protection transmission line of electricity, so as to improve the security of transmission line of electricity.
Embodiment two：
As shown in figure 4, the utility model embodiment provides a kind of electric power system, including transformer TB and above-described embodiment
One over-pressure safety device provided.Wherein, transformer TB primary coil L3 connection power networks, secondary coil L2 connections exchange is defeated
Go out to hold b, d, as ac output end, AC power is provided for electrical equipment.Induction coil L1 windings in over-pressure safety device
In the secondary iron core of transformer.
In the electric power system that the utility model embodiment is provided, in addition to the first relay J1, protect the output end of chip
Connect the first relay J1 control end.
Specifically, the protection chip in the present embodiment has two output ends b1, b2.Wherein, the first of protection chip is defeated
Go out to hold b1 to pass through bidirectional triode thyristor BG the first relays of connection J1 control coil；The second output end b2 of chip is protected to pass through limit
Leakage resistance R4 is connected to bidirectional triode thyristor BG control end.
Controllable silicon BG is also referred to as IGCT (Silicon Controlled Rectifier, abbreviation SCR), with volume
The features such as small, structure is relatively easy, function is strong, is one of the more commonly used semiconductor devices.Controllable silicon BG in the present embodiment
For bidirectional thyristor, bidirectional thyristor is a kind of device of bi directional conductibility as bilateral diode, and difference is many one
Control section, this just makes it have the working characteristics entirely different with diode.When the control end incoming level to bidirectional thyristor
During signal, negative electrode and anode can just be turned on.
The level of the second output end b2 outputs of protection chip is transmitted to bidirectional triode thyristor BG control end, is made two-way controllable
Silicon BG conducting.Meanwhile, protection chip the first output end b1 output level by bidirectional triode thyristor BG export to first after
Electrical equipment J1 control coil, disconnects the first relay J1 output ends, so as to realize the protection of supply line.
In addition, being also in series with resistance R5 and light-emitting diodes between the second output end b2 and bidirectional triode thyristor BG of protection chip
Pipe D6, when protecting chip failure, fault current can make light emitting diode D6 send alarm light, remind user to arrange in time
Except failure.
Further, the electric power system that the utility model embodiment is provided also includes the second relay J2.First relay J1
Output end connected with the second relay J2 control coil, the second relay J2 output end and transformer TB primary coil
L3 connects.
As a preferred scheme, when the first relay J1 is closed type relay, i.e. control coil no power first after
Electrical equipment J1 output is in closure state.Meanwhile, when the second relay J2 is normal-open type relay, i.e. control coil no power
First relay J1 output end is off.
In the case of electric power system normal power supply, the first relay J1 control coil no power, the first relay J1
Output in closure state, therefore control power supply can be supplied by the first relay J1 to the second relay J2 control coil
Electricity.Second relay J2 control coil is in the case of energization, and its output is in closure state, to maintain transformer TB's
Primary coil L3 continued powers.Meanwhile, protect the first output end b1 and the second output end b2 of chip to be exported without level signal.
When protecting the trigger element in chip to send power-off signal, the first relay J1 control coil is powered, and makes the
One relay J1 output end disconnects.Because the first relay J1 output end disconnects, therefore the second relay J2 control line
Circle power-off, disconnects the second relay J2 output end, so that the connection of power network and transformer TB primary coil L3 is cut off, with
The power supply of electric power system is cut off, the protection of supply line is realized.
In the present embodiment, the first relay J1 uses closed type relay, and the second relay J2 uses normal-open type relay
Have further the advantage that：In actual electric power system, can the first relay J1 output end with the second relay J2's
The relay for multiple different purposes of being connected between control coil, such as the relay of relay, overvoltage protection for arc protection
Device, and the relay for short-circuit protection.These relays also all use closed type relay, and each relay is defeated
Go out control coil of the end all with the second relay J2 connect, then wherein the disconnection of any one relay when, can make second after
Electrical equipment J2 control coil power-off, so as to cut off the power supply of power system.
The electric power system that the utility model embodiment two is provided, the over-pressure safety device provided with above-described embodiment one, tool
There is identical technical characteristic, so can also solve identical technical problem, reach identical technique effect.
In addition, in the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the utility model.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying phase
To importance.
Finally it should be noted that：Embodiment described above, embodiment only of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, protection domain of the present utility model are not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
The technical staff in art field is in the technical scope that the utility model is disclosed, and it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model described should be wanted with right
The protection domain asked is defined.
Claims (10)
1. a kind of over-pressure safety device, it is characterised in that including induction coil, rectification circuit and protection chip；
The induction coil is used for the secondary iron core for being wrapped in transformer, and produces alternating current impression signal；
The rectification circuit is connected between the induction coil and the protection chip, and the rectification circuit feels the exchange
Induction signal rectification is direct current induced signal；
The protection chip receives the direct current induced signal, when the direct current induced signal exceeds preset value, the protection
Chip exports power-off signal.
2. over-pressure safety device according to claim 1, it is characterised in that the rectification circuit is rectifier bridge.
3. over-pressure safety device according to claim 1, it is characterised in that also including being connected to the rectification circuit and institute
State the filter circuit and amplifying circuit between protection chip.
4. over-pressure safety device according to claim 1, it is characterised in that the protection chip include comparing unit and
Trigger element；
The comparing unit receives the direct current induced signal, and the direct current induced signal and the preset value are compared
Compared with；
When the direct current induced signal exceeds preset value, the trigger element exports power-off signal.
5. over-pressure safety device according to claim 4, it is characterised in that multistable is provided with the trigger element and is touched
Send out device；
When the direct current induced signal exceeds preset value, the multistable trigger exports power-off signal.
6. a kind of electric power system, it is characterised in that the overvoltage guarantor including transformer and as described in any one of claim 1 to 5
Protection unit；
The primary coil connection power network of the transformer, secondary coil connection ac output end；
Induction coil in the over-pressure safety device is wrapped in the secondary iron core of transformer.
7. electric power system according to claim 6, it is characterised in that also including the first relay；
The output end of the protection chip connects the control end of first relay.
8. electric power system according to claim 7, it is characterised in that the first output end of the protection chip passes through two-way
Controllable silicon connects the control coil of first relay；
Second output end of the protection chip connects the control end of the bidirectional triode thyristor by current-limiting resistance.
9. electric power system according to claim 8, it is characterised in that also including the second relay；
The output end of first relay is connected with the control coil of second relay, the output of second relay
Connected with the primary coil at end.
10. electric power system according to claim 9, it is characterised in that first relay is closed type relay, institute
The second relay is stated for normal-open type relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162342.2U CN206432691U (en) | 2017-02-22 | 2017-02-22 | Over-pressure safety device and electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720162342.2U CN206432691U (en) | 2017-02-22 | 2017-02-22 | Over-pressure safety device and electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206432691U true CN206432691U (en) | 2017-08-22 |
Family
ID=59590243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720162342.2U Active CN206432691U (en) | 2017-02-22 | 2017-02-22 | Over-pressure safety device and electric power system |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786354A (en) * | 2017-02-22 | 2017-05-31 | 中领世能（天津）科技有限公司 | Over-pressure safety device and electric power system |
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
-
2017
- 2017-02-22 CN CN201720162342.2U patent/CN206432691U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786354A (en) * | 2017-02-22 | 2017-05-31 | 中领世能（天津）科技有限公司 | Over-pressure safety device and electric power system |
| WO2018153000A1 (en) * | 2017-02-22 | 2018-08-30 | 中领世能（天津）科技有限公司 | Over-voltage protection apparatus and power supply system |
| CN108599348A (en) * | 2018-07-10 | 2018-09-28 | 广东电网有限责任公司 | Substation ground network electric energy recovering system |
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