CN106711922A - Electrical shock protection device and power supply system - Google Patents
Electrical shock protection device and power supply system Download PDFInfo
- Publication number
- CN106711922A CN106711922A CN201710088169.0A CN201710088169A CN106711922A CN 106711922 A CN106711922 A CN 106711922A CN 201710088169 A CN201710088169 A CN 201710088169A CN 106711922 A CN106711922 A CN 106711922A
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- China
- Prior art keywords
- output end
- relay
- electrical shock
- signal
- protective device
- Prior art date
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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 invention provides an electrical shock protection device and a power supply system and relates to the technical field of safety power supply. The electrical shock protection device can effectively prevent electric shock harms resulted from various reasons. The electrical shock protection device comprises a sensing circuit and a protecting chip; the sensing circuit is used for sensing a current signal at an alternating current output end, generating a sensing signal and transmitting the sensing signal to the protecting chip; and the protecting chip is used for generating a safety carrier signal according to the sensing signal, outputting the safety carrier signal to the alternating current output end and causing the alternating current output end to output the grounding reactive power.
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. 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.Because circuit is old
Change or damaged, live wire can be caused exposed outside with the part metals line of zero line, human body directly or indirectly touches exposed metal
During line, when particularly touching live wire, loop will be formed with ground by human body, cause to get an electric shock and injure.In addition, in electrical equipment
During use, due to the internal fault of electrical equipment, also can be powered using the surface of electric equipment, if now human contact arrives
The electrical equipment, will also result in electric shock injury.
Current anti-electric shock socket on the market, by setting on-off circuit in socket, can be in the energized state, it is ensured that
Each jack is without electricity before appliance plug is not inserted into.The anti-electric shock socket can recognize whether insert is electrical equipment
Plug, only two jacks can just be powered when inserting appliance plug simultaneously, so conductor is inserted separately into any pole all without tactile
Electricity.
But, existing anti-electric shock socket can only be prevented due to being mistakenly inserted the electric shock that conductor is caused at socket, and for
The electric shock that the electric leakage reason such as metal wire is exposed, electrical equipment surface is powered is caused does not have prevention effect.Therefore, for electric leakage etc.
The electric shock injury that many reasons are caused, prior art is difficult to effectively prevention.
The content of the invention
In view of this, it is an object of the invention to provide a kind of electrical shock protective device and electric power system, can be effectively pre-
The electric shock injury that anti-a variety of causes is caused.
In a first aspect, a kind of electrical shock protective device is the embodiment of the invention provides, including sensor circuit and protection chip；
The sensor circuit senses the current signal of ac output end, generates induced signal, and the induced signal is passed
Transport to the protection chip；
The protection chip generates safe carrier signal according to the induced signal, and the safe carrier signal is exported
To ac output end, ac output end is set to export reactive power over the ground.
With reference in a first aspect, the embodiment of the invention provides the first possible implementation method of first aspect, wherein, should
Electrical shock protective device also includes rectification circuit；
The input connection ac output end of the rectification circuit, the output end of the rectification circuit connects the protection core
The power end of piece.
With reference in a first aspect, the embodiment of the invention provides second possible implementation method of first aspect, wherein, institute
Rectification circuit is stated for rectifier bridge.
With reference in a first aspect, the embodiment of the invention provides the third possible implementation method of first aspect, wherein, institute
Stating protection chip includes N-channel technotron, comparator and carrier generator；
The grid of the N-channel technotron connects the sensor circuit, source ground, the drain electrode connection comparing
The input of device；
The output end of the comparator connects the input of the carrier generator, and the output end of the carrier generator is led 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 in a first aspect, the embodiment of the invention provides the 4th kind of possible implementation method of first aspect, wherein, institute
State protection chip in also include trigger；
The input of the trigger connects the output end of the comparator；
When the comparison signal exceeds preset value, the trigger exports power-off signal.
With reference in a first aspect, the embodiment of the invention provides the 5th kind of possible implementation method of first aspect, wherein, institute
Stating sensor circuit includes inductive reactance, and the inductive reactance is connected between the protection chip and ac output end.
With reference in a first aspect, the embodiment of the invention provides the 6th kind of possible implementation method of first aspect, wherein, institute
Stating sensor circuit also includes the inductance capacitance being of coupled connections with the inductive reactance.
Second aspect, the embodiment of the present invention also provides a kind of electric power system, including transformer and above-mentioned electrical shock protection
Device；
The primary coil connection power network of the transformer, the connection ac output end of the secondary coil of the transformer.
With reference to second aspect, the first possible implementation method of second aspect is the embodiment of the invention provides, wherein, should
Electric power system also 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 end of the trigger, the output end of first relay
Control coil with second relay is connected, and the output end of second relay is connected with the primary coil.
With reference to second aspect, second possible implementation method of second aspect is the embodiment of the invention provides, wherein, institute
The first relay is stated for closed type relay, second relay is normal-open type relay.
The embodiment of the present invention brings following beneficial 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 induced signal, and induced signal is transmitted to protection chip.Protection chip according to
Induced 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 induced signal and send to protection chip.Protection chip root
According to the intensity of induced signal, the safe carrier signal of corresponding amplitude is generated, make alternating current steady with the formal systemization of safe carrier wave
Fixed output, makes ac output end export reactive power over the ground, can play security isolation effect, ac output end is not led to
Cross human body and form loop with ground.Therefore, electrical shock protective device provided in an embodiment of the present invention, can effectively prevent a variety of causes to make
Into electric shock injury.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or 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 obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art, below will be to specific
The accompanying drawing to be used needed for implementation method or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the electrical shock protective device that the embodiment of the present invention one is provided；
Fig. 2 is another schematic diagram of the electrical shock protective device that the embodiment of the present invention one is provided；
Fig. 3 is the schematic diagram of protection chip in the electrical shock protective device that the embodiment of the present invention one is provided；
Fig. 4 is the schematic diagram of the electric power system that the embodiment of the present invention two is provided.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Current anti-electric shock socket can only be prevented due to being mistakenly inserted the electric shock that conductor is caused, and for metal at socket
The electric shock that the electric leakage reason such as line is exposed, electrical equipment surface is powered is caused does not have prevention effect.Therefore, it is various for electric leakage etc.
The electric shock injury that reason is caused, prior art is difficult to effectively prevention.
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 to make
Into electric shock injury.
Embodiment one：
A kind of electrical shock protective device is the embodiment of the invention provides, the electricity consumption scene such as family or unit is can be applied to.Such as Fig. 1
With shown in Fig. 2, the electrical shock protective device includes sensor circuit and protection chip.The electric current letter of sensor circuit sensing ac output end
Number, induced signal is generated, and induced 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.
Protection chip generates safe carrier signal according to induced signal, and safe carrier signal is exported by diode D0
To ac output end, make ac output end b and ac output end d outputs reactive power over the ground.
Sensor circuit in the present embodiment includes that inductive reactance R, inductive reactance R are connected to protection chip and ac output end
Between.It is further also to include inductance capacitance C1, C2 for being of coupled connections with inductive reactance R in sensor circuit.
Current signal on ac output end b, by the coupling effect between inductive reactance R and inductance capacitance C1, C2,
Induced signal is generated, and reacts circuit and transmit to protection chip the induced signal.
In the present embodiment, inductance capacitance C1, C2 are adjustable condenser, in order to be applied to a variety of environment, sense
Answer the specific size of electric capacity C1, C2 can when dispatching from the factory, voltage, current conditions according to application scenarios be adjusted set.
It is further also to include rectification circuit in electrical shock protective device provided in an embodiment of the present invention.Rectification circuit
Two inputs connect ac output end b, d, the power end of the output end connection protection chip of rectification circuit, so as to will hand over respectively
The rectification of stream output end b, d is direct current, and for protection chip provides dc source.
Used as a preferred scheme, 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, commutation diode D1 is connected with the anode of commutation diode D3, commutation diode D2 with it is whole
The negative electrode of stream diode D4 is connected, and the anode of the negative electrode of commutation diode D1 connection commutation diode D2, commutation diode D3
Negative electrode connection commutation diode D4 anode.Within each work period of rectifier bridge, the same time only has two diodes
It is operated, 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 FET T, comparator and carrier generator, its midfield
Effect pipe T is specially N-channel technotron.The drain electrode d of the input connection FET T of comparator, comparator it is defeated
Go out the input of end connection carrier generator, the output end of carrier generator connects ac output end by diode.
The grid g connection sensor circuits of FET T, source electrode s ground connection, drain electrode d connects the input of comparator.Junction type
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 for constituting, is common one kind in monopole FET, and junction field is brilliant
It can be divided to two kinds of N-channel and P-channel to body pipe, and N-channel technotron is used in the present embodiment.
In the present embodiment, the source electrode s ground connection of FET 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 FET T receive negative voltage induced signal.Grid g is in source electrode s
Between voltage Vgs negative value increase, the resistance of raceway groove will be made increase, and drain current Id reduction.Because N-type semiconductor
Internal electronics is repelled by the electric field that grid negative potential is formed, and thicker depletion layer is produced around P areas, N-type semiconductor
Conducting channel narrows, and drain electrode to the electric current between source electrode reduces.Due to this kind of characteristic, drain current Id can be subject to gate-source voltage
The control of Vgs.
With the change of the induced signal that sensor circuit is exported, the drain current Id of FET T can also change.Leakage
Electrode current Id is input into comparator, you can current power network current is detected using comparator.
After comparator receives the drain current Id of FET 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 the way of carrier wave
Alternating current.When human body directly or indirectly touches exchange output line, comparator meeting output intensity (exception) very high compares
Signal, carrier generator exports the safe carrier signal of corresponding amplitude according to the intensity of comparison signal, alternating current is carried with safety
The formal systemization stabilization of ripple is exported, and ac output end is exported reactive power over the ground, can play security isolation effect, is made
Ac output end will not form loop by human body with ground.Therefore, electrical shock protective device provided in an embodiment of the present invention, Neng Gouyou
The electric shock that effect prevention a variety of causes is caused is injured.
It is further to protect chip also to include trigger in the embodiment of the present invention.The input connection of trigger is compared
The output end of device.When supply line is short-circuited or overloads etc. phenomenon, the preset value that comparison signal can exceed 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 induced signal and send to comparator, and comparator is according to different
Normal induced signal life intensity (exception) comparison signal very high, and the abnormal comparison signal is sent to protection chip.
Protection chip generates the safe carrier signal of corresponding amplitude according to the intensity of comparison signal, makes alternating current with the shape of safe carrier wave
Formula systematization stabilization is exported, and ac output end is exported reactive power over the ground, can play security isolation effect, makes exchange defeated
Going out end will not form loop by human body with ground.In addition, be still active power between ac output end b, d, therefore, it is possible to
While pre- protection against electric shock is injured, 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 for being provided.Wherein, the primary coil connection power network of transformer TB, the two ends of the secondary coil of transformer TB
Connection ac output end d and ac output end b, exports alternating current respectively.
It is further that the electric power system that the present embodiment is provided also includes the first relay J1 and the second relay J2.The
The output end of the protection chip in the control coil connection electrical shock protective device of one relay J1, the output end of the first relay J1
With the control coil and control power sources in series, the output end of the second relay J2 and the primary line of transformer of the second relay J2
Circle series connection.
As a preferred scheme, the first relay when the first relay J1 is closed type relay, i.e. coil no power
The output of J1 is in closure state.Meanwhile, the first relay when the second relay J2 is normal-open type relay, i.e. coil no power
The output end 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
Go out end be in closure state, therefore control power supply can by coil power supply from the first relay J1 to the second relay J2.Second
In the case of energization, its output is continued the coil of relay J2 in closure state with the primary coil for maintaining transformer
Power supply.Meanwhile, protect the output end of chip to be exported without power-off signal.
When protect chip in trigger element send power-off signal when, the coil electricity of the first relay J1, make first after
The output end of electrical equipment J1 disconnects.Due to the first relay J1 output end disconnect, therefore the second relay J2 coil blackout, make
The output end of the second relay J2 disconnects, so that the connection of power network and the primary coil of transformer is cut off, to cut off electric power system
Power supply, so as to realize the protection of supply line.
In the present embodiment, the first relay J1 uses closed type relay, the second relay J2 to use normal-open type relay
Have further the advantage that：In actual electric power system, can be in the output end of the first relay J1 with the second relay J2's
The relay of multiple difference purposes of being connected between coil, such as the relay of relay, overvoltage protection for overload protection, with
And for the relay of short-circuit protection.These relays also all use closed type relay, and each relay output end
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 power system.
Electric power system provided in an embodiment of the present invention, the electrical shock protective device provided with above-described embodiment one has identical
Technical characteristic, so can also solve identical technical problem, reaches identical technique effect.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify describe, rather than indicate imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, 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, specific embodiment only of the invention, is used to illustrate the present invention
Technical scheme, 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 within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of embodiment of the present invention technical scheme, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of electrical shock protective device, it is characterised in that including sensor circuit and protection chip；
The sensor circuit senses the current signal of ac output end, generates induced signal, and by the induced signal transmit to
The protection chip；
The protection chip generates safe carrier signal according to the induced signal, and the safe carrier signal is exported into best friend
Stream output end, makes ac output end export reactive power over the ground.
2. electrical shock protective device according to claim 1, it is characterised in that also including rectification circuit；
The input connection ac output end of the rectification circuit, the output end connection protection chip of the rectification circuit
Power end.
3. electrical shock protective device according to claim 2, it is characterised in that the rectification circuit is rectifier bridge.
4. electrical shock protective device according to claim 1, it is characterised in that the protection chip includes N-channel junction type
Effect pipe, comparator and carrier generator；
The grid of the N-channel technotron connects the sensor circuit, and source ground, drain electrode connects the comparator
Input；
The output end of the comparator connects the input of the carrier generator, and the output end 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.
5. electrical shock protective device according to claim 4, it is characterised in that also include trigger in the protection chip；
The input of the trigger connects the output end of the comparator；
When the comparison signal exceeds preset value, the trigger exports power-off signal.
6. electrical shock protective device according to claim 1, it is characterised in that the sensor circuit includes inductive reactance, institute
Inductive reactance is stated to be connected between the protection chip and ac output end.
7. electrical shock protective device according to claim 6, it is characterised in that the sensor circuit also includes and the sensing
The inductance capacitance that resistance is of coupled connections.
8. a kind of electric power system, it is characterised in that the electric shock including transformer and as described in any one of claim 1 to 7 is protected
Protection unit；
The primary coil connection power network of the transformer, the connection ac output end of the secondary coil of the transformer.
9. electric power system according to claim 8, it is characterised in that also including 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 end of the trigger, the output end of first relay and institute
The control coil series connection of the second relay is stated, the output end of second relay is connected with the primary coil.
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 (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 true CN106711922A (en) | 2017-05-24 |
| CN106711922B 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) |
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| WO2018149063A1 (en) * | 2017-02-17 | 2018-08-23 | 中领世能（天津）科技有限公司 | Isolation protection apparatus and power supply system |
| WO2018149066A1 (en) * | 2017-02-17 | 2018-08-23 | 中领世能 (天津) 科技有限公司 | Electric shock protection device and power supply system |
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| WO2018149066A1 (en) * | 2017-02-17 | 2018-08-23 | 中领世能 (天津) 科技有限公司 | Electric shock protection device and power supply 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 |
| WO2018214189A1 (en) * | 2017-05-26 | 2018-11-29 | 中领世能（天津）科技有限公司 | Power supply system, and multi-stage protection device for same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018149066A1 (en) | 2018-08-23 |
| CN106711922B (en) | 2018-06-08 |
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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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