CN106711923A - Isolation protection device and power supply system - Google Patents
Isolation protection device and power supply system Download PDFInfo
- Publication number
- CN106711923A CN106711923A CN201710088666.0A CN201710088666A CN106711923A CN 106711923 A CN106711923 A CN 106711923A CN 201710088666 A CN201710088666 A CN 201710088666A CN 106711923 A CN106711923 A CN 106711923A
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- China
- Prior art keywords
- output end
- isolating
- relay
- signal
- protecting 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 isolation protection device and a power supply system, and relates to the technical field of isolation protection devices and power supply systems, which aim at effectively preventing the influence of humidity to power lines. The isolation protection device comprises a sensing circuit and an isolation chip, wherein the sensing circuit is used for sensing a current signal of an alternating current output end, generating a sensing signal, and transmitting the sensing signal to the isolation chip; the isolation chip is used for generating an isolation carrier signal according to the sensing signal, and outputting the isolation carrier signal to the alternating current output end.
Description
Technical field
The present invention relates to safe power supply technical field, more particularly, to a kind of isolating and protecting 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.In family or list
When the electricity consumption scenes such as position are in dampness, the environment of water is particularly frequently used in toilet, kitchen etc., between live wire and zero line
It is easy to because moist or get wet and be short-circuited.When aging circuit, breakage, live wire and zero line can expose outside, as
It is moist or get wet and make to be short-circuited between live wire and zero line.
It is short-circuited between live wire and zero line, is easily caused fire, and electrical equipment and power supply unit can be caused to damage
Etc. adverse consequences.At present, for the damp-proof problem of supply line, generally using measures such as anti-blushing agent, moistureproof glue, by anti-blushing agent
Or moistureproof glue is coated in the position that circuit, socket etc. easily make moist, get wet, using the insulation of anti-blushing agent or protection against the tide glue, moisture proof,
The characteristics such as anticreep, anticorrosion, Inverter fed motor, the safety of maintenance electric line.
But, it is difficult to cover the every nook and cranny of power circuit, and anti-blushing agent or moistureproof glue using anti-blushing agent or moistureproof glue
Effect also can slowly be degenerated with the time, therefore prior art is difficult to effectively to prevent the power circuit from being influenceed by humidity.
The content of the invention
In view of this, it is an object of the invention to provide a kind of isolating and protecting device and electric power system, can effectively prevent
The only moist influence to power circuit.
In a first aspect, a kind of isolating and protecting device is the embodiment of the invention provides, including sensor circuit and isolating chip；
The sensor circuit senses the current signal of ac output end, generates induced signal, and the induced signal is passed
Transport to the isolating chip；
The isolating chip exports the isolation carrier signal according to induced signal generation isolation carrier signal
To ac output end.
With reference in a first aspect, the embodiment of the invention provides the first possible implementation method of first aspect, wherein, should
Isolating and protecting device also includes rectification circuit；
The input connection ac output end of the rectification circuit, the output end of the rectification circuit connects the isolated 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 isolating 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
Stating also includes trigger in isolating 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.
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 isolating 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 insulation blocking
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；
Isolating chip in the isolating and protecting 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 isolating and protecting device provided in an embodiment of the present invention, including sensor circuit and isolating chip.Wherein, sensor circuit
Sense the current signal of ac output end, generate induced signal, and induced signal is transmitted to isolating chip.Isolating chip according to
Induced signal generation isolation carrier signal, and isolation carrier signal is exported to ac output end.
Using isolating and protecting device provided in an embodiment of the present invention, when exchanging output line by humidity or getting wet, sensing
Circuit can sense the abnormal current on circuit, and generate induced signal and send to isolating chip.Isolating chip is according to sensing
The intensity of signal, generates the isolation carrier signal of corresponding amplitude, makes alternating current and is exported with isolating the formal systemization stabilization of carrier wave,
And play buffer action, it is to avoid it is short-circuited between two exchange output lines such that it is able to effectively prevent humidity to power circuit
Influence.
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 isolating and protecting device that the embodiment of the present invention one is provided；
Fig. 2 is another schematic diagram of the isolating and protecting device that the embodiment of the present invention one is provided；
Fig. 3 is the schematic diagram of isolating chip in the isolating and protecting 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.
At present, it is difficult to cover the every nook and cranny of power circuit, and anti-blushing agent or moistureproof glue using anti-blushing agent or moistureproof glue
Effect also can slowly be degenerated with the time, therefore prior art is difficult to effectively to prevent the power circuit from being influenceed by humidity.
A kind of isolating and protecting device provided in an embodiment of the present invention and electric power system, can effectively prevent humidity to electric power
The influence of circuit.
Embodiment one：
A kind of isolating and protecting 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 isolating and protecting device includes sensor circuit and isolating chip.The electric current letter of sensor circuit sensing ac output end
Number, induced signal is generated, and induced signal is transmitted to isolating 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.
Isolating chip is exported isolation carrier signal by diode D0 according to induced signal generation isolation carrier signal
To ac output end.
Sensor circuit in the present embodiment includes that inductive reactance R, inductive reactance R are connected to isolating 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 isolating 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 isolating and protecting device provided in an embodiment of the present invention.Rectification circuit
Two inputs connect ac output end b, d respectively, and the output end of rectification circuit connects the power end of isolating chip, so as to will hand over
The rectification of stream output end b, d is direct current, and for isolating 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, by the one-way conduction function of diode, strong alternating current is converted into unidirectional DC pulse voltage.
As shown in figure 3, the isolating 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), carrier generator output amplitude smoothly isolates carrier signal, to isolate carrier wave in the way of it is defeated
Go out stable alternating current.When exchanging output line by humidity or getting wet, comparator can output intensity (exception) ratio very high
Compared with signal, carrier generator exports the isolation carrier signal of corresponding amplitude, makes alternating current to isolate according to the intensity of comparison signal
The formal systemization stabilization of carrier wave is exported, and plays buffer action, it is to avoid be short-circuited between two exchange output lines, so as to
It is enough effectively to prevent the moist influence to power circuit.
It is further that isolating chip also includes trigger in the embodiment of the present invention.The input connection of trigger is compared
The output end of device.When the preset value that comparison signal exceeds inside trigger, trigger output power-off signal disconnects transmission line of electricity
Power supply.
Using isolating and protecting device provided in an embodiment of the present invention, when exchanging output line by humidity or getting wet, sensing
Circuit can sense the abnormal current on circuit, and generate induced signal and send to comparator, and comparator is according to abnormal sense
Induction signal life intensity (exception) comparison signal very high, and the abnormal comparison signal is sent to isolating chip.Isolated core
Piece generates the isolation carrier signal of corresponding amplitude according to the intensity of comparison signal, makes alternating current to isolate the formal system of carrier wave
Change stabilization output, and play buffer action, it is to avoid be short-circuited between two exchange output lines such that it is able to effectively prevent humidity
Influence to power circuit.
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 isolating and protecting 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 isolating chip in the control coil connection isolating and protecting 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, the output end of isolating chip is exported without power-off signal.
When the trigger element in isolating chip sends power-off signal, 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 isolating and protecting 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 isolating and protecting device, it is characterised in that including sensor circuit and isolating chip；
The sensor circuit senses the current signal of ac output end, generates induced signal, and by the induced signal transmit to
The isolating chip；
The isolation carrier signal is exported best friend by the isolating chip according to induced signal generation isolation carrier signal
Stream output end.
2. isolating and protecting 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 of the rectification circuit connects the isolating chip
Power end.
3. isolating and protecting device according to claim 2, it is characterised in that the rectification circuit is rectifier bridge.
4. isolating and protecting device according to claim 1, it is characterised in that the isolating 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. isolating and protecting device according to claim 4, it is characterised in that also include trigger in the isolating 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. isolating and protecting 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 isolating chip and ac output end.
7. isolating and protecting 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 isolation 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；
Isolating chip in the isolating and protecting 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 |
|---|---|---|---|
| CN201710088666.0A CN106711923B (en) | 2017-02-17 | 2017-02-17 | Isolating and protecting device and electric power system |
| PCT/CN2017/088119 WO2018149063A1 (en) | 2017-02-17 | 2017-06-13 | Isolation protection apparatus and power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710088666.0A CN106711923B (en) | 2017-02-17 | 2017-02-17 | Isolating and protecting device and electric power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106711923A true CN106711923A (en) | 2017-05-24 |
| CN106711923B CN106711923B (en) | 2018-06-19 |
Family
ID=58911810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710088666.0A Active CN106711923B (en) | 2017-02-17 | 2017-02-17 | Isolating and protecting device and electric power system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106711923B (en) |
| WO (1) | WO2018149063A1 (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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| CN112087245B (en) * | 2019-06-12 | 2021-12-24 | 天地融科技股份有限公司 | Power line carrier communication device and communication method |
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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 |
|---|---|
| WO2018149063A1 (en) | 2018-08-23 |
| CN106711923B (en) | 2018-06-19 |
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