CN106711922B - Electrical shock protective device and electric power system - Google Patents
Electrical shock protective device and electric power system Download PDFInfo
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- CN106711922B CN106711922B CN201710088169.0A CN201710088169A CN106711922B CN 106711922 B CN106711922 B CN 106711922B CN 201710088169 A CN201710088169 A CN 201710088169A CN 106711922 B CN106711922 B CN 106711922B
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- Prior art keywords
- relay
- signal
- protection chip
- output terminal
- output end
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
Abstract
The present invention provides a kind of electrical shock protective device and electric power systems, are related to safe power supply technical field, can effectively prevent injury of getting an electric shock caused by a variety of causes.The electrical shock protective device includes sensor circuit and protection chip；The current signal of the sensor circuit sensing ac output end, generates inductive signal, and the inductive signal is transmitted to the protection chip；The protection chip generates safe carrier signal, and the safe carrier signal is exported to ac output end according to the inductive signal, makes the reactive power of ac output end output over the ground.
Description
Technical field
The present invention relates to safe power supply technical field, more particularly, to a kind of electrical shock protective device and electric power system.
Background technology
With the development of power technology, industrial-frequency alternating current (i.e. alternating current) has spread all over each family and unit, electricity consumption
Safety also becomes more and more important.
Current alternating current is usually powered by two output lines, wherein one is firewire, another is zero curve.Since circuit is old
Change or damaged, the part metals line that can cause firewire and zero curve is exposed outside, and human body directly or indirectly touches exposed metal
During line, it when particularly touching firewire, will be formed into a loop by human body and ground, cause to get an electric shock and injure.In addition, in electrical equipment
During use, due to the internal fault of electrical equipment, also the surface of electric equipment can be used to charge, if human contact arrives at this time
The electrical equipment will also result in electric shock injury.
Anti-electric shock socket on the market at present, can be in the energized state by setting switching circuit in socket, it is ensured that
Each jack is without electricity before appliance plug is not inserted into.The anti-electric shock socket can identify whether insert is electric appliance
Plug can just be powered when being only inserted into appliance plug simultaneously there are two jack, so conductor is inserted separately into any pole and will not all touch
Electricity.
But existing anti-electric shock socket can only prevent from getting an electric shock caused by due to being mistakenly inserted conductor at socket, and for
It gets an electric shock caused by the electric leakage reasons such as metal wire is exposed, the electrification of electrical equipment surface and does not have prevention effect.Therefore, for electric leakage etc.
It gets an electric shock and injures caused by many reasons, the prior art is difficult to effectively prevent.
Invention content
In view of this, the purpose of the present invention is to provide a kind of electrical shock protective device and electric power systems, can be effectively pre-
It gets an electric shock and injures caused by anti-a variety of causes.
In a first aspect, an embodiment of the present invention provides a kind of electrical shock protective device, including sensor circuit and protection chip；
The current signal of the sensor circuit sensing ac output end, generates inductive signal, and the inductive signal is passed
Transport to the protection chip；
The protection chip generates safe carrier signal, and the safe carrier signal is exported according to the inductive signal
To ac output end, make the reactive power of ac output end output over the ground.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, it should
Electrical shock protective device further includes rectification circuit；
The input terminal connection ac output end of the rectification circuit, the output terminal of the rectification circuit connect the protection core
The power end of piece.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein, institute
Rectification circuit is stated as rectifier bridge.
With reference to first aspect, an embodiment of the present invention provides the third possible embodiment of first aspect, wherein, institute
It states protection chip and includes N-channel technotron, comparator and carrier generator；
The grid of the N-channel technotron connects the sensor circuit, source electrode ground connection, and drain electrode connects the comparison
The input terminal of device；
The output terminal of the comparator connects the input terminal of the carrier generator, and the output terminal of the carrier generator leads to
Cross diode connection ac output end；
The comparator exports comparison signal according to the N-channel technotron drain current, and the carrier wave occurs
Device is according to the comparison signal outgoing carrier signal.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiment of first aspect, wherein, institute
It states in protection chip and further includes trigger；
The input terminal of the trigger connects the output terminal of the comparator；
When the comparison signal exceeds preset value, the trigger exports power-off signal.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein, institute
It states sensor circuit and includes inductive reactance, the inductive reactance is connected between the protection chip and ac output end.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiment of first aspect, wherein, institute
It states sensor circuit and further includes the inductance capacitance being of coupled connections with the inductive reactance.
Second aspect, the embodiment of the present invention also provide a kind of electric power system, including transformer and above-mentioned electrical shock protection
Device；
The primary coil connection power grid of the transformer, the connection ac output end of the secondary coil of the transformer.
With reference to second aspect, an embodiment of the present invention provides the first possible embodiment of second aspect, wherein, it should
Electric power system further includes the first relay and the second relay；
Protection chip in the electrical shock protective device includes trigger；
The control coil of first relay connects the output terminal of the trigger, the output terminal of first relay
It connects with the control coil of second relay, the output terminal of second relay is connected with the primary coil.
With reference to second aspect, an embodiment of the present invention provides second of possible embodiment of second aspect, wherein, institute
The first relay is stated as closed type relay, second relay is normal-open type relay.
The embodiment of the present invention brings following advantageous effect：
In electrical shock protective device provided in an embodiment of the present invention, including sensor circuit and protection chip.Wherein, sensor circuit
Sense the current signal of ac output end, generate inductive signal, and inductive signal is transmitted to protection chip.Protect chip according to
Inductive signal generates safe carrier signal, and safe carrier signal is exported to ac output end.
Using electrical shock protective device provided in an embodiment of the present invention, when human body directly or indirectly touches exchange output line
When, sensor circuit can sense the abnormal current on circuit, and generate inductive signal and be sent to protection chip.Protect chip root
According to the intensity of inductive signal, the safe carrier signal of corresponding amplitude is generated, makes alternating current steady with the formal systemization of safe carrier wave
Fixed output makes the reactive power of ac output end output over the ground, can play the role of security isolation, ac output end is made not lead to
Human body is crossed to be formed into a loop with ground.Therefore, electrical shock protective device provided in an embodiment of the present invention can effectively prevent a variety of causes and make
Into electric shock injury.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
For the above objects, features and advantages of the present invention is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the schematic diagram of electrical shock protective device that the embodiment of the present invention one provides；
Fig. 2 is another schematic diagram of electrical shock protective device that the embodiment of the present invention one provides；
Fig. 3 is the schematic diagram that chip is protected in the electrical shock protective device that the embodiment of the present invention one provides；
Fig. 4 is the schematic diagram of electric power system provided by Embodiment 2 of the present invention.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
Current anti-electric shock socket can only prevent electric shock caused by due to being mistakenly inserted conductor at socket, and for metal
It gets an electric shock caused by the electric leakage reasons such as line is exposed, the electrification of electrical equipment surface and does not have prevention effect.Therefore, it is a variety of for electric leakage etc.
It gets an electric shock and injures caused by reason, the prior art is difficult to effectively prevent.
A kind of electrical shock protective device provided in an embodiment of the present invention and electric power system can effectively prevent a variety of causes and make
Into electric shock injury.
Embodiment one：
An embodiment of the present invention provides a kind of electrical shock protective devices, can be applied to the electricity consumptions scene such as family or unit.Such as Fig. 1
Shown in Fig. 2, which includes sensor circuit and protection chip.The electric current letter of sensor circuit sensing ac output end
Number, inductive signal is generated, and inductive signal is transmitted to protection chip.Sensor circuit is connected in two ac output ends b, d
Wherein one end, the present embodiment illustrates by taking sensor circuit connection ac output end b as an example.
Chip is protected to generate safe carrier signal according to inductive signal, and safe carrier signal is exported by diode D0
To ac output end, make the reactive power of ac output end b and ac output end d outputs over the ground.
Sensor circuit in the present embodiment includes inductive reactance R, and inductive reactance R is connected to protection chip and ac output end
Between.Further, inductance capacitance C1, the C2 being of coupled connections with inductive reactance R are further included in sensor circuit.
Current signal on ac output end b, by the coupling effect between inductive reactance R and inductance capacitance C1, C2,
Inductive signal is generated, and reacts circuit and the inductive signal is transmitted to protection chip.
In the present embodiment, inductance capacitance C1, C2 are adjustable condenser, in order to be suitable for a variety of different environment, sense
The specific size of capacitance C1, C2 is answered setting can be adjusted according to the voltage of application scenarios, current conditions in manufacture.
Further, further include rectification circuit in electrical shock protective device provided in an embodiment of the present invention.Rectification circuit
Two input terminals connect ac output end b, d, the power end of the output terminal connection protection chip of rectification circuit, so as to hand over respectively
It is direct current to flow output terminal b, d rectification, and provides DC power supply for protection chip.
As a preferred embodiment, the rectification circuit in the present embodiment is rectifier bridge.Rectifier bridge is specifically by four rectifications two
Pole pipe D1, D2, D3, D4 connection composition, rectifier diode D1 is connected with the anode of rectifier diode D3, rectifier diode D2 with it is whole
The cathode of stream diode D4 is connected, and the anode of the cathode of rectifier diode D1 connection rectifier diode D2, rectifier diode D3
Cathode connection rectifier diode D4 anode.Within each work period of rectifier bridge, the same time, only there are two diodes
It works, using the one-way conduction function of diode, strong alternating current is converted into unidirectional DC pulse voltage.
As shown in figure 3, the protection chip in the present embodiment includes field-effect tube T, comparator and carrier generator, midfield
Effect pipe T is specially N-channel technotron.The drain electrode d of the input terminal connection field-effect tube T of comparator, comparator it is defeated
Outlet connects the input terminal of carrier generator, and the output terminal of carrier generator connects ac output end by diode.
The grid g connection sensor circuits of field-effect tube T, source electrode s ground connection, the input terminal for the d connection comparators that drain.Junction type field
Effect transistor (Junction Field-Effect Transistor, abbreviation JFET) is by PN junction grid, source electrode and drain electrode
A kind of three-terminal active device with enlarging function formed, is one kind common in monopole field-effect tube, and junction field is brilliant
It can be divided to two kinds of N-channel and P-channel to body pipe, using N-channel technotron in the present embodiment.
In the present embodiment, the source electrode s ground connection of field-effect tube T, drain electrode d provide positive voltage by comparator, makes the voltage of source electrode s
Less than the voltage of drain electrode d, the grid g connection sensor circuits of field-effect tube T receive negative voltage inductive signal.Grid g is in source electrode s
Between voltage Vgs negative value increase, the resistance for making raceway groove increase, and drain current Id reduction.This is because N-type semiconductor
Internal electronics is repelled by the electric field that grid negative potential is formed, and thicker depletion layer is generated around P areas, N-type semiconductor
Conducting channel narrows, and drains to the electric current between source electrode and reduces.Due to such characteristic, drain current Id can be by gate-source voltage
The control of Vgs.
With the variation of the inductive signal of sensor circuit output, the drain current Id of field-effect tube T can also change.Leakage
Electrode current Id is input to comparator, you can current power network current is detected using comparator.
After comparator receives the drain current Id of field-effect tube T, by the benchmark electricity inside drain current Id and comparator
Stream is compared, and exports corresponding comparison signal.
Carrier generator exports corresponding carrier signal according to the situation of change of comparison signal.When the ratio of comparator output
During compared with signal in normal range (NR), the stable carrier signal of carrier generator output amplitude is exported smoothly in a manner of carrier wave
Alternating current.When human body directly or indirectly touches exchange output line, comparator meeting output intensity very high (abnormal) compares
Signal, carrier generator answer the safe carrier signal of amplitude, make alternating current to carry safely according to the intensity of comparison signal, the output phase
The formal systemization of wave stablizes output, makes the reactive power of ac output end output over the ground, can play the role of security isolation, make
Ac output end will not be formed into a loop by human body and ground.Therefore, electrical shock protective device provided in an embodiment of the present invention, Neng Gouyou
It gets an electric shock and injures caused by effect prevention a variety of causes.
Further, chip is protected to further include trigger in the embodiment of the present invention.The input terminal connection of trigger is compared
The output terminal of device.When phenomena such as supply line's generation short circuit or overload, comparison signal can exceed the preset value inside trigger,
Trigger will export power-off signal, disconnect the power supply of transmission line of electricity.
Using electrical shock protective device provided in an embodiment of the present invention, when human body directly or indirectly touches exchange output line
When, sensor circuit can sense the abnormal current on circuit, and generate inductive signal and be sent to comparator, and comparator is according to different
Very high (abnormal) comparison signal of normal inductive signal life intensity, and the comparison signal of the exception is sent to protection chip.
Chip is protected to generate the safe carrier signal of corresponding amplitude according to the intensity of comparison signal, make alternating current with the shape of safe carrier wave
Output is stablized in formula systematization, is made the reactive power of ac output end output over the ground, can be played the role of security isolation, make exchange defeated
Outlet will not be formed into a loop by human body and ground.In addition, be still active power between ac output end b, d, therefore can be
While pre- protection against electric shock injury, the normal operation of each electrical equipment in supply line is kept.
Embodiment two：
As shown in figure 4, the embodiment of the present invention also provides a kind of electric power system, including transformer TB and above-described embodiment one
The electrical shock protective device provided.Wherein, the primary coil connection power grid of transformer TB, the both ends of the secondary coil of transformer TB
Connection ac output end d and ac output end b respectively exports alternating current.
Further, electric power system provided in this embodiment further includes the first relay J1 and the second relay J2.The
The output terminal of protection chip in the control coil connection electrical shock protective device of one relay J1, the output terminal of the first relay J1
It connects with the control coil and control power supply of the second relay J2, the output terminal of the second relay J2 and the primary line of transformer
Circle series connection.
As a preferred embodiment, the first relay when the first relay J1 is closed type relay, i.e. coil no power
The output of J1 is in closed state.Meanwhile second relay J2 be normal-open type relay, i.e. coil no power when the first relay
The output terminal of device J1 is off.
In the case of electric power system normal power supply, the coil no power of the first relay J1, the first relay J1's is defeated
Outlet is in closed state, therefore controls power supply can be by the first relay J1 to the coil power supply of the second relay J2.Second
In the case of energization, output is continued the coil of relay J2 in closed state with the primary coil for maintaining transformer
Power supply.Meanwhile the output terminal of chip is protected to be exported without power-off signal.
When the trigger element in chip is protected to send out power-off signal, the coil of the first relay J1 is powered, make first after
The output terminal of electric appliance J1 disconnects.Since the output terminal of the first relay J1 disconnects, the coil blackout of the second relay J2 makes
The output terminal of second relay J2 disconnects, so as to cut off the connection of the primary coil of power grid and transformer, to cut off electric power system
Power supply, so as to fulfill the protection of supply line.
In the present embodiment, the first relay J1 uses closed type relay, and the second relay J2 uses normal-open type relay
It has further the advantage that：It, can be in the output terminal and the second relay J2 of the first relay J1 in the practical electric power system
The relay for multiple and different purposes of connecting between coil, such as the relay of overload protection, the relay of overvoltage protection, with
And the relay for short-circuit protection.These relays are also all using closed type relay, and each output terminal of relay
Coil all with the second relay J2 is connected, then when wherein any one relay disconnects, can make the second relay J2's
Coil blackout, so as to cut off the power supply of electric system.
Electric power system provided in an embodiment of the present invention has identical with the electrical shock protective device that above-described embodiment one provides
Technical characteristic so can also solve the technical issues of identical, reaches identical technique effect.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In addition, term " first ", " second ", " third " are only used for description purpose, and it is not intended that instruction or implying phase
To importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement is carried out to which part technical characteristic；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be subject to the protection scope in claims.
Claims (7)
1. a kind of electrical shock protective device, which is characterized in that including sensor circuit and protection chip；
The current signal of the sensor circuit sensing ac output end, generates inductive signal, and the inductive signal is transmitted to
The protection chip；The sensor circuit includes inductive reactance R, the inductive reactance R and is connected to the protection chip with exchanging
Between output terminal, inductance capacitance C1, the C2 being of coupled connections with the inductive reactance R are further included in the sensor circuit；
Current signal on ac output end is imitated by the coupling between the inductive reactance R and described inductance capacitance C1, C2
Should, inductive signal is generated, and react circuit and the inductive signal is transmitted to the protection chip；
The protection chip generates safe carrier signal, and the safe carrier signal is exported best friend according to the inductive signal
Output terminal is flowed, makes the reactive power of ac output end output over the ground；
The protection chip includes N-channel technotron, comparator and carrier generator；
The grid of the N-channel technotron connects the sensor circuit, source electrode ground connection, and drain electrode connects the comparator
Input terminal；
The output terminal of the comparator connects the input terminal of the carrier generator, and the output terminal of the carrier generator passes through two
Pole pipe connects ac output end；
The comparator exports comparison signal, the carrier generator root according to the N-channel technotron drain current
According to the comparison signal outgoing carrier signal.
2. electrical shock protective device according to claim 1, which is characterized in that further include rectification circuit；
The input terminal connection ac output end of the rectification circuit, the output terminal connection protection chip of the rectification circuit
Power end.
3. electrical shock protective device according to claim 2, which is characterized in that the rectification circuit is rectifier bridge.
4. electrical shock protective device according to claim 1, which is characterized in that further include trigger in the protection chip；
The input terminal of the trigger connects the output terminal of the comparator；
When the comparison signal exceeds preset value, the trigger exports power-off signal.
5. a kind of electric power system, which is characterized in that get an electric shock including transformer and such as Claims 1-4 any one of them and protect
Protection unit；
The primary coil connection power grid of the transformer, the secondary coil connection ac output end of the transformer.
6. electric power system according to claim 5, which is characterized in that further include the first relay and the second relay；
Protection chip in the electrical shock protective device includes trigger；
The control coil of first relay connects the output terminal of the trigger, the output terminal of first relay and institute
The control coil series connection of the second relay is stated, the output terminal of second relay is connected with the primary coil.
7. electric power system according to claim 6, which is characterized in that first relay be closed type relay, institute
The second relay is stated as normal-open type relay.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088169.0A CN106711922B (en) | 2017-02-17 | 2017-02-17 | Electrical shock protective device and electric power system |
| PCT/CN2017/088433 WO2018149066A1 (en) | 2017-02-17 | 2017-06-15 | Electric shock protection device and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088169.0A CN106711922B (en) | 2017-02-17 | 2017-02-17 | Electrical shock protective device and electric power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106711922A CN106711922A (en) | 2017-05-24 |
| CN106711922B true CN106711922B (en) | 2018-06-08 |
Family
ID=58911801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710088169.0A Active CN106711922B (en) | 2017-02-17 | 2017-02-17 | Electrical shock protective device and electric power system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106711922B (en) |
| WO (1) | WO2018149066A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711923B (en) * | 2017-02-17 | 2018-06-19 | 中领世能（天津）科技有限公司 | Isolating and protecting device and electric power system |
| CN106711922B (en) * | 2017-02-17 | 2018-06-08 | 中领世能（天津）科技有限公司 | Electrical shock protective device and electric power system |
| CN107086554A (en) * | 2017-05-26 | 2017-08-22 | 中领世能（天津）科技有限公司 | Electric power system and its multi-stage protection device |
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| CN106711922B (en) * | 2017-02-17 | 2018-06-08 | 中领世能（天津）科技有限公司 | Electrical shock protective device and electric power system |
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- 2017-06-15 WO PCT/CN2017/088433 patent/WO2018149066A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106711922A (en) | 2017-05-24 |
| WO2018149066A1 (en) | 2018-08-23 |
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Address after: Tianjin Beichen economic and Technological Development Zone, Tianjin city Beichen District 300400 Industrial Park in North Road No. 10 Applicant after: Who can (Tianjin) Technology Co. Ltd. Address before: 300457, Tianjin Binhai New Area, Tianjin free trade zone (Airport Economic Zone), No. 80 North River Road, airport business park, 8, building 107, 108, room S6E Applicant before: Who can (Tianjin) Technology Co. Ltd. |
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