CN103795045B - Protection device - Google Patents
Protection device Download PDFInfo
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- CN103795045B CN103795045B CN201210426131.7A CN201210426131A CN103795045B CN 103795045 B CN103795045 B CN 103795045B CN 201210426131 A CN201210426131 A CN 201210426131A CN 103795045 B CN103795045 B CN 103795045B
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- Prior art keywords
- isolator
- power supply
- protection
- protector
- protection device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/613—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in parallel with the load as final control devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present embodiments relate to a kind of protection device, the device includes：Derailing switch and the first isolator；One end of derailing switch is connected with the negative pole of power supply or is connected with the positive pole of power supply；One end of first isolator is concatenated with the other end of derailing switch；When one end of derailing switch is connected with the negative pole of power supply, the other end of the first isolator is connected with the positive pole of power supply；When one end of derailing switch is connected with the positive pole of power supply, the other end of the first isolator is connected with the negative pole of power supply；When there is negative pole surge voltage or electric current in power supply, the conducting of the first isolator, and surge current is shunted with derailing switch, prevent surge current from entering by protection equipment.Therefore, the protection device realizes the differential mode protection for the power supply of larger magnitude, improves long wave lightning protection capability, the protection circuit area reduced.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of protection device.
Background technology
The power supply of communication equipment is often disturbed by overvoltage, and the overvoltage is produced by direct lightning strike or induced lightening,
Or power-frequency overvoltage, the switching overvoltage of inside generation of electric power system etc..The harmfulness of overvoltage is very big, directly threatens people
The safety of body and communication equipment, therefore, uses the protection device of overvoltage to be very crucial in the power supply of communication equipment, so that
So that overvoltage is reduced to the voltage range that communication equipment is allowed.
At present, the power supply of communication equipment is protected according to the differential mode of low amounts level, and the differential mode protection circuit of its low amounts level is one
Level protection circuit.Increase a piezo-resistance between the positive and negative electrode of the power supply of communication equipment（Metal Oxide
Varistor, MOV）；According to the differential mode protection of high-magnitude, the differential mode protection circuit of its high-magnitude is dual-electrode protecting circuit.Separately
Outside, for larger magnitude, two-stage or multi-level protection circuit are used as 10kA and the protection of the power supply differential mode of the above.Wherein,
Stage circuit is using multiple piezo-resistances form in parallel.
When the power supply of communication equipment is by overvoltage or overcurrent, because the residual voltage of the piezo-resistance of the first order is usual
Compare high, in order to reduce the impact to late-class circuit, it is necessary to increase decoupling element or circuit after piezo-resistance.But, should
The volume ratio of decoupling element or circuit is larger.
When the power supply of communication equipment is struck by lightning by opposed polarity, due to the presence of electrochemical capacitor in power circuit so that
The lightning protection properties of protection circuit have larger difference.When thunder-strike current flows to positive pole from power cathode, to protection circuit rear class
Impact wants much harsh, is mainly shown as that the electric current for pouring in late-class circuit is larger, then late-class circuit or device are easier to damage；
And in the surge impact by positive pole to negative pole, the electric current for flowing through protection circuit rear class is relatively on the low side, then the lightning protection of the direction
Tolerance is stronger.
Protection circuit commonly used in the prior art be mainly used in solve shortwave Lightning Protection, such as 8/20us current waves, still
For long wave lightning protection, such as 10/350us current waves, its protecting effect is very poor.
The content of the invention
It is big, reliable with the volume for solving existing protection device presence the embodiments of the invention provide a kind of protection device
Property low, long wave lightning protection effect it is poor the problems such as, the long wave lightning protection capability of the protection device can be improved using derailing switch and isolator,
And the protection circuit area of the protection device is reduced, while the protection device reliability can also be improved.
In a first aspect, the invention provides a kind of protection device, described device includes：Derailing switch and the first isolator；
One end of the derailing switch is connected with the negative pole of power supply or is connected with the positive pole of the power supply；The one of first isolator
End is concatenated with the other end of the derailing switch；When one end of the derailing switch is connected with the negative pole of the power supply, described
The other end of one isolator is connected with the positive pole of the power supply；When one end of the derailing switch is connected with the positive pole of the power supply
When connecing, the other end of first isolator is connected with the negative pole of the power supply；When negative pole surge current occurs in the power supply
When, the first isolator conducting, and the surge current is shunted with the derailing switch, prevent the surge current enters from being protected
Protect equipment.
In the first possible implementation, described device also includes：First protector；First protector and institute
The first isolator is stated to be connected in parallel；First protector is connected in series with the derailing switch；When positive pole wave occurs in the power supply
When gushing electric current, the first isolator cut-off, the derailing switch and first protector shunt the surge current, prevent institute
State surge current and enter described by protection equipment.
In second of possible implementation, described device also includes：First protector；First protector, with
The derailing switch of the concatenation and the first isolator are connected in parallel；When positive pole surge current occurs in the power supply, described first is single
End to device, first protector shunts the surge current, prevent the surge current from entering described by protection equipment.
With reference to second of possible implementation of first aspect, in the third possible implementation, described device
Also include：Second isolator；Second isolator is connected in series with first protector；When positive pole wave occurs in the power supply
When gushing electric current, the first isolator cut-off, second isolator is turned on, second isolator and first protector
The surge current is shunted, prevents the surge current from entering described by protection equipment.
In implementation with reference to first to the 3rd any energy of first aspect, in the 4th kind of possible implementation
In, described device also includes：Decoupler；The decoupler be connected in series in the power supply negative pole and it is described by protection equipment it
Between, and/or it is serially connected in the positive pole of the power supply and described by between protection equipment；Power supply described in the decoupler partial pressure is positive and negative
Voltage between pole, prevents described overvoltage occur by protection equipment.
With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, described device
Also include：Second protector；Second protector, it is and described in parallel by protection equipment, connected with the decoupler；Described
Two protectors shunt the surge current that the power supply occurs, and prevent the surge current from entering described by protection equipment.
In first to the 5th any possible implementation with reference to first aspect or combination first aspect, at the 6th kind
In possible implementation, described device also includes：Overcurrent protector；The overcurrent protector is connected company with the derailing switch
Connect；The overcurrent protector is used for when the protection device breaks down, and protection device is disconnected from power port, prevents from drawing
Play power failure.
By applying protection device provided in an embodiment of the present invention, derailing switch and the series connection of the first isolator are applied to direct current
Power supply carries out differential mode protection.Protection device residual voltage in inrush current shock is extremely low, utilizes the conducting of the first isolator, low residual voltage
Characteristic realizes that the differential mode of power cathode to positive pole is protected；It is achieved thereby that the differential mode of the power supply for realizing larger magnitude is protected
Shield, can not only improve the long wave lightning protection capability of the protection device, and the protection circuit area of the device and traditional protection
Circuit is compared to that can reduce by more than 40%, while reliability also has greatly improved.
Brief description of the drawings
Fig. 1 is the schematic diagram for the protection device that the embodiment of the present invention one is provided；
Fig. 2 is the circuit diagram for the protection device that the embodiment of the present invention two is provided；
Fig. 3 is the circuit diagram for the protection device that the embodiment of the present invention three is provided；
Fig. 4 is the schematic diagram for the protection device that the embodiment of the present invention four is provided；
Fig. 5 is the schematic diagram for the protection device that the embodiment of the present invention five is provided；
Fig. 6 is the schematic diagram for the protection device that the embodiment of the present invention six is provided；
Fig. 7 is the schematic diagram for the protection device that the embodiment of the present invention seven is provided
Fig. 8 is the circuit diagram for the protection device that the embodiment of the present invention eight is provided；
Fig. 9 is the circuit diagram for the protection device that the embodiment of the present invention nine is provided；
Figure 10 is the circuit diagram for the protection device that the embodiment of the present invention ten is provided；
Figure 11 is the circuit diagram for the protection device that the embodiment of the present invention 11 is provided；
Figure 12 is the circuit diagram for the protection device that the embodiment of the present invention 12 is provided；
Figure 13 is the circuit diagram for the protection device that the embodiment of the present invention 13 is provided；
Figure 14 is the circuit diagram for the protection device that the embodiment of the present invention 14 is provided；
Figure 15 is the circuit diagram for the protection device that the embodiment of the present invention 15 is provided；
Figure 16 is the circuit diagram for the protection device that the embodiment of the present invention 16 is provided；
Figure 17 is the circuit diagram for the protection device that the embodiment of the present invention 17 is provided；
Figure 18 is the circuit diagram for the protection device that the embodiment of the present invention 18 is provided.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
The invention discloses a kind of protection device, derailing switch and the series connection of the first isolator are applied to dc source, utilized
First isolator one-way conduction, low residual voltage characteristic realize that the differential mode of power cathode to positive pole is protected, and are substantially reduced late-class circuit
Shunting；The follow current interrupt of derailing switch is realized using the reverse or controllable cut-off characteristics of the first isolator.It is disclosed by the invention
Protection device circuit can effectively solve the problems such as volume present in prior art is big, reliability is low, long wave lightning protection effect is poor,
It is achieved thereby that the differential mode protection of the power supply of larger magnitude, can not only improve the long wave lightning protection capability of the power supply, and the dress
The protection circuit area put can reduce by more than 40% compared with traditional protection circuit, while reliability also has greatly improved
Fig. 1 is the schematic diagram for the protection device that the embodiment of the present invention one is provided, as illustrated, the present embodiment topology control dress
Put and specifically include：Derailing switch 11, the first isolator 12.Wherein, the position of the isolator 12 of derailing switch 11 and first can be exchanged.I.e.
One end of derailing switch 11 is connected with the negative pole of power supply, or is connected with the positive pole of power supply.The isolator 12 of derailing switch 11 and first
Constitute tie point.
When one end of derailing switch 11 is connected with the negative pole of power supply, one end of the first isolator 12 is another with derailing switch 11
One end is concatenated, and the other end of the first isolator 12 is connected with the positive pole of power supply.
When one end of derailing switch 11 is connected with the positive pole of power supply, one end of the first isolator 12 is another with derailing switch 11
One end is concatenated, and the other end of the first isolator 12 is connected with the negative pole of power supply.
When there is negative pole surge voltage or electric current in power supply, the forward conduction of the first isolator 12, and shunted with derailing switch 11
Surge current, prevents surge current from entering by protection equipment.
In addition, it is worthy of note that, in all embodiments of the invention, the position of the isolator 12 of derailing switch 11 and first is all
It can exchange, therefore, explanation just be not repeated in all embodiments of the invention.
In the protection device that the embodiment of the present invention one is provided, the derailing switch 11 used is switching mode over-voltage suppression（Protection）Device
Part or switching mode over-voltage suppression（Protection device）Combination.Wherein, switching-type device is, gas-discharge tube（Gas
Discharge Tube, GDT）Or transient state suppresses IGCT（ThyristorSurge Suppressor, TSS）Deng.First is unidirectional
Device 12 be one-way type device, or one-way type device combination.Wherein, one-way type device is, diode, or metal-oxide-
Semiconductor（Metal-Oxid-Semiconductor, MOS）Pipe etc..
The protection device that the embodiment of the present invention one is provided implements circuit as shown in Figures 2 and 3.
In fig. 2, gas-discharge tube and diode D1 are connected in series, when negative pole surge voltage or electric current occurs in power supply,
Diode D1 forward conductions, and surge current is shunted with gas-discharge tube, prevent surge current from entering by protection equipment.Wherein,
Gas-discharge tube and diode D1 position can be exchanged, but diode D1 negative electrode and the direction of anode are constant, as long as protecting
When there is negative pole surge voltage or electric current in card power supply, diode D1 forward conductions.
In figure 3, gas-discharge tube and metal-oxide-semiconductor are connected in series, and the grid of metal-oxide-semiconductor can carry out by sampling control circuit
Control, when negative pole surge current occurs in power supply, sampling control circuit will sample from surge voltage and export high level so that
Metal-oxide-semiconductor is opened, and shunts surge current with gas-discharge tube, prevents surge current from entering by protection equipment.Wherein, gas discharge
The position of pipe and metal-oxide-semiconductor can be exchanged, as long as ensure that negative pole surge voltage or electric current occurs in power supply, and metal-oxide-semiconductor is opened.
Fig. 4 is the schematic diagram for the protection device that the embodiment of the present invention four is provided, as illustrated, the present embodiment topology control dress
Put and specifically include：Derailing switch 11, the first isolator 12 and the first protector 13.
One end of derailing switch 11 is connected with the negative pole of power supply, and the other end of derailing switch 11 is connected with the first isolator 12
Connect；Derailing switch 11 is connected in series with the first isolator 12；The other end of first isolator 12 is connected with the positive pole of power supply.
Wherein, the isolator 12 of derailing switch 11 and first composition tie point；First protector 13 can be with tie point
First isolator 12 is connected in parallel, as shown in Figure 4；Or first protector 13 be connected in parallel with tie point, as shown in Figure 5.
The following detailed description of the operation principle of the protection device：
The first, the first protector 13 can be connected in parallel with the first isolator 12 of tie point.
When power supply run into positive pole to negative pole surge voltage or electric current when, then the first isolator 12 ends, and derailing switch 11
Shielded with the first protector 13, while the first isolator 12 is subjected to the pressure-resistant of the first protector 13 connected in parallel；
When power supply run into negative pole to positive pole surge voltage or electric current when, then the first isolator 12 is turned on, the first isolator 12 and switch
Device 11 shields.
The second, the first protector 13 is connected in parallel with tie point.
When power supply run into positive pole to negative pole surge voltage or electric current when, then the first isolator 12 ends, and tie point is not
Action, and the first protector 13 shields；When power supply run into negative pole to positive pole surge voltage or electric current when, then first is single
Turned on to device 12, the first isolator 12 and derailing switch 11 shield.Wherein, the reverse voltage endurance capability of the first isolator 12 compared with
By force, it is breakdown voltage of the first isolator breakdown voltage plus derailing switch.
Fig. 6 is a kind of schematic diagram for protection device that the embodiment of the present invention six is provided.As illustrated, the present embodiment topology control
Device processed is specifically included：Derailing switch 11, the first isolator 12, the first protector 13 and the second isolator 14.First isolator 12
It is in opposite direction with the second isolator 14.When the first isolator 12 is turned on, the second isolator 14 ends；When the first isolator 12
During cut-off, the second isolator 14 is turned on.
One end of derailing switch 11 is connected with the negative pole of power supply, one end of the other end of derailing switch 11 and the first isolator 12
It is connected；Derailing switch 11 is connected in series with the first isolator 12；The other end of first isolator 12 is connected with the positive pole of power supply.
Wherein, the isolator 12 of derailing switch 11 and first composition tie point.
One end of second isolator 14 is connected with the positive pole of power supply；The other end and the first protector of second isolator 14
13 are connected.Second isolator 14 is connected in series with the first protector 13.The other end of first protector 13 and the negative pole of power supply
It is connected.Wherein, the second isolator 14 and the first protector 13 constitute the second branch road, and the second branch road is in parallel with tie point even
Connect.In addition, the position of the second isolator 14 and the first protector 13 can also be exchanged.
When power supply run into positive pole to negative pole surge voltage or electric current when, then the first isolator 12 reversely cut-off, second is single
To the forward conduction of device 14, second branch road shields；When the power supply runs into negative pole to the surge voltage or electricity of positive pole
During stream, then the forward conduction of the first isolator 12, the second reversely cut-off of isolator 14, the tie point shields
In the protection device that the embodiment of the present invention four, embodiment five and embodiment six are provided, the derailing switch 11 used is to open
Pass type over-voltage suppression（Protection）Device, such as gas-discharge tube（Gas Discharge Tube, GDT）, transient state suppress IGCT
（Thyristor Surge Suppressor, TSS）, or switching mode over-voltage suppression（Protection）The combination of device.First protection
Device 13 is over-voltage suppression（Protection）Device, such as, and MOV pipes, Transient Suppression Diode（Transient Voltage
Suppressor, TVS）Pipe, or over-voltage suppression（Protection）The combination of device.First isolator 12 and the second isolator 14 are single
To the combination of type device, or one-way type device.Wherein, one-way type device is, diode, or metal-oxide-semiconductor etc..
Further, the first of the protection device that the embodiment of the present invention one, example IV, embodiment five and embodiment six are provided
Also include in branch road：Overcurrent protector.The overcurrent protector is used for when protection device breaks down, by protection device from power supply
Port disconnects, so as to prevent from causing power failure.
By taking the protection device that the embodiment of the present invention six is provided as an example, overcurrent protection will be added in the tie point of protection device
Device, as shown in Figure 7.The one end of overcurrent protector 15 is connected with the negative pole of power supply, one end phase of its other end and derailing switch 11
Connection；Overcurrent protector 15 is connected in series with derailing switch 11.Wherein, overcurrent protector 15 can be mutual with the position of derailing switch 11
Change.
When the first isolator 12 breaks down, the afterflow of derailing switch 11 or power supply short circuit failure etc. are prevented.In addition, this hair
Overcurrent protector is added in the protection device that bright embodiment one, example IV and embodiment five are provided and the embodiment of the present invention six is carried
Overcurrent protector effect is added in the tie point of the protection device of confession identical, no longer described in detail herein.Wherein, excessively stream is protected
The element or circuit of overcurrent protection function can be had for fuse, thermistor etc. by protecting device 15.
Derailing switch 11, the first isolator 12 and the first protector in the protection device that the embodiment of the present invention four, five is provided
13 composition first order protection circuits.Derailing switch 11, the first isolator 12 in the protection device that the embodiment of the present invention six is provided, the
One protector 13 and the second isolator 14 composition first order protection circuit.
Further, the first order for the protection device that example IV, embodiment five and the embodiment six that the present invention is provided are provided
Also include decoupler in protection circuit.One end of the decoupler is connected with the negative pole of power supply, and the other end of decoupler is with being protected
Shield equipment is connected, and decoupler by protection equipment with being connected in series；Or one end of decoupler is connected with the positive pole of power supply, moves back
The other end of coupling device is connected with by protection equipment, and decoupler by protection equipment with being connected in series.
In addition, the decoupler be able to can have multiple with more than one.Such as, power supply negative pole and by protection equipment it
Between concatenate a decoupler, while being concatenated in the positive pole in power supply and between protection equipment another decoupler.
Decoupler is added in the protection device that the embodiment of the present invention four is provided, is set by the decoupler of concatenation and by protection
It is standby, in parallel with the derailing switch concatenated and the first protector.Wherein, the effect of decoupler is：When surge voltage or electricity occurs in power supply
During stream, the surge current first flows through the decoupler of concatenation and by protection equipment, with the increase of current strength, decoupler two ends
Voltage rise, while concatenation decoupler and by the voltage of protection equipment also rise, when voltage reaches the first protection circuit
During operation voltage, then the first protection circuit starts action, and at this moment most of electric current flows through the first protection circuit, only sub-fraction
Electric current flows through the decoupler of concatenation and by protection equipment, so as to prevent most of electric current to flow through by protection equipment；Meanwhile, decoupling
Device has carried out partial pressure to the decoupler of concatenation and by the voltage at protection equipment two ends, electricity occurs by protection equipment so as to prevent
The situation of pressure.
The embodiment of the present invention five provide protection device in add decoupler, by the decoupler of concatenation and by protection equipment,
In parallel with the first protector, the effect of the decoupler in the protection device that the embodiment of the present invention one is provided with adding decoupler
Effect is identical.
In addition, also have another method for adding decoupler in the protection device that the embodiment of the present invention five is provided, will
First protector and in parallel by protection equipment, then by decoupler with and the first protector for connecing and connected by protection equipment, work as institute
When stating power supply and negative pole surge voltage or electric current occur, decoupler voltage rises the derailing switch for causing concatenation and the shunting of the first diode
Surge current, prevents surge current from entering by protection equipment, can strengthen the reliability of derailing switch action.
Decoupler is added in the protection device that embodiment six that the present invention is provided is provided, by the decoupler of concatenation and is protected
Equipment, in parallel with the second diode concatenated and the first protector, the effect of the decoupler in the embodiment of the present invention one with providing
Protection device in add decoupler effect it is identical.
Further, the protection device that the embodiment of the present invention four, embodiment five and embodiment six are provided also includes the second protection
Device, the second protector is with connecting by protection equipment parallel connection and with decoupler.
Fig. 8 is the schematic diagram for the protection device that the embodiment of the present invention eight is provided.As illustrated, the embodiment of the present invention is specifically wrapped
Include：The protection circuit 22 of first order protection circuit 21 and second.Wherein, second level protection circuit 22 is protected by decoupler 16 and second
Device 17 is constituted.
Decoupler 16 is by the single or multiple component groups acted on decoupling such as inductance, resistance, metal-oxide-semiconductor, wire, cable
Into.Second protector 17 is over-voltage suppression（Protection）Device, such as, MOV pipe, TVS pipe, or over-voltage protector combination.
When power supply runs into surge voltage or electric current, the second protection circuit 22 is first acted, and the surge current first flows through second
Protection circuit 22, when the voltage of the second protection circuit 22 reaches the operation voltage of first order protection circuit 21, surge current is then
Major part flows through first order protection circuit 21, and the electric current for flowing through the second protection circuit 22 is smaller so that the second protection circuit 22
Residual voltage it is relatively low, so that it is guaranteed that by protection equipment be communication equipment normally operation or be not damaged.Such as：Protect the second level
Circuit 22 is weaker using through-current capability, and the response time is than faster TVS pipe, it would however also be possible to employ piezo-resistance；First order circuit 21
Strong using through-current capability, the higher multiple piezo-resistances of residual voltage are in parallel.When the power supply of communication equipment is by inrush current shock,
Response time, faster TVS pipe was first acted, and surge current is first flowed through flows level TVS afterwards, when TVS pipe and the voltage at inductance two ends reach
During the operation voltage of piezo-resistance, surge current starts the most electric current for flowing through piezo-resistance, now flowing through late-class circuit
It is smaller so that TVS pipe residual voltage is relatively low, it is ensured that protected communication equipment normally runs or is not damaged.
It is worthy of note that, protection device provided in an embodiment of the present invention can be to include the single-stage of first order protection circuit
Protection device, two class protection device either including first order protection circuit and second level protection circuit or except including
Also include the multi-stage protection device of other grade of protection circuit outside first class of protection circuit and second level protection circuit.
According to embodiments of the present invention four, embodiment five flutters structure with three kinds of different supports that embodiment six is provided, specifically
The bright physical circuit figure for realizing the protection device.
First, structure is flutterred as foundation using the support that the embodiment of the present invention four is provided.
Fig. 9 is the circuit diagram for the protection device that the embodiment of the present invention nine is provided.As illustrated, the circuit diagram is protected for single-stage
The circuit diagram of device.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas-discharge tube GDT, pressure-sensitive electricity
Hinder MOV1 and piezo-resistance MOV2.Compared to Figure 1, gas-discharge tube GDT is derailing switch 11, and diode D1 is the first isolator
12, piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel as the first protector 13.The operation principle of its operation principle and Fig. 4
It is identical.No longer describe in detail herein.
Figure 10 is the circuit diagram for the protection device that the embodiment of the present invention ten is provided.As illustrated, the circuit diagram is to use to move back
The circuit diagram of the single-stage protection device of coupling inductance.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas
Discharge tube GDT, piezo-resistance MOV1, piezo-resistance MOV2 and inductance L.Compared with Fig. 4, gas-discharge tube GDT is derailing switch 11,
Diode D1 is the first isolator 12, and piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel as the first protector 13.Wherein,
Increased inductance L is decoupler in the circuit diagram.Wherein, inductance L effect is：When there is surge voltage or electric current in power supply,
The surge current first flows through the inductance L of concatenation and by protection equipment, with the increase of current strength, on the voltage at inductance L two ends
Rise, at the same concatenation inductance L and by the voltage of protection equipment also rise, when voltage reaches diode D1 and gas-discharge tube
During the operation voltage of branch road where GDT, then gas-discharge tube GDT starts action, at this moment most of electric current flow through diode D1 and
Branch road where gas-discharge tube GDT, only sub-fraction electric current flows through the inductance L of concatenation and by protection equipment, so as to prevent
Most of electric current is flowed through by protection equipment；Meanwhile, inductance L is carried out to the inductance L of concatenation and by the voltage at protection equipment two ends
, there is the situation of overvoltage so as to prevent by protection equipment in partial pressure.
Figure 11 is the circuit diagram for the protection device that the embodiment of the present invention 11 is provided.As illustrated, the circuit diagram is two-stage
The circuit diagram of protection device.Specifically included in the circuit diagram of the two class protection device：Diode D1, gas-discharge tube GDT, pressure
Quick resistance MOV1, piezo-resistance MOV2, inductance L, piezo-resistance MOV3 and piezo-resistance MOV4.Compared with Fig. 8, gas-discharge tube
GDT, diode D1, piezo-resistance MOV1, piezo-resistance MOV2 composition first order protection circuit 21；Inductance L is decoupler 15, pressure
Quick resistance MOV3 and piezo-resistance MOV4 are connected in parallel as the second protector 16, inductance L, resistance MOV3 and piezo-resistance MOV4
Constitute second level protection circuit 22.Its operation principle is identical with Fig. 8 operation principle.No longer describe in detail herein.
Second, structure is flutterred as foundation using the support that the embodiment of the present invention five is provided.
Figure 12 is the circuit diagram for the protection device that the embodiment of the present invention 12 is provided.As illustrated, the circuit diagram is single-stage
The circuit diagram of protection device.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas-discharge tube GDT, pressure
Quick resistance MOV1 and piezo-resistance MOV2.Compared with Fig. 2, gas-discharge tube GDT is derailing switch 11, and diode D1 is first unidirectional
Device 12, piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel as the first protector 13.Its operation principle and Fig. 5 work are former
Reason is identical.No longer describe in detail herein.
Figure 13 is the circuit diagram for the protection device that the embodiment of the present invention 13 is provided.As illustrated, the circuit diagram is to use
The circuit diagram of the single-stage protection device of decoupling inductance.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas
Body discharge tube GDT, piezo-resistance MOV1, piezo-resistance MOV2 and inductance L.Compared with Fig. 2, gas-discharge tube GDT is derailing switch
11, diode D1 are the first isolator 12, and piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel as the first protector 13.Its
In, increased inductance L is decoupler in the circuit diagram.Inductance L effect is identical with the effect of the inductance L in Figure 10, at this
In no longer describe in detail.
Figure 14 is the circuit diagram for the protection device that the embodiment of the present invention 14 is provided.Figure 13 is that the embodiment of the present invention two is provided
Protection device dual-electrode protecting circuit circuit diagram.As illustrated, the circuit diagram of the dual-electrode protecting circuit includes：Diode
D1, gas-discharge tube GDT, piezo-resistance MOV1, piezo-resistance MOV2, inductance L, piezo-resistance MOV3 and piezo-resistance MOV4.
Compared with Fig. 8, gas-discharge tube GDT, diode D1, piezo-resistance MOV1, piezo-resistance MOV2 composition first order protection circuits
21；Inductance L is decoupler 15, and piezo-resistance MOV 3 and piezo-resistance MOV4 are connected in parallel as the second protector 16, inductance L,
Resistance MOV3 and piezo-resistance MOV4 composition second level protection circuits 22.Its operation principle is identical with Fig. 8 operation principle.At this
In no longer describe in detail.
Figure 15 is the circuit diagram for the protection device that the embodiment of the present invention 15 is provided.The circuit diagram is another use decoupling
The circuit diagram of the single-stage protection device of inductance.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas are put
Fulgurite GDT, piezo-resistance MOV1, piezo-resistance MOV2 and inductance L.Compared with Fig. 2, gas-discharge tube GDT is derailing switch 11, two
Pole pipe D1 is the first isolator 12, inductance L.Wherein, increased inductance L is decoupler in the circuit diagram.Inductance L goes out in power supply
During existing negative pole surge current, inductance L voltage, which rises, causes gas-discharge tube GDT and diode D1 shunting surge currents, prevents
Surge current enters by protection equipment, can strengthen the reliability of derailing switch action.
3rd, structure is flutterred as foundation using the support that the embodiment of the present invention six is provided.
Figure 16 is the circuit diagram for the protection device that the embodiment of the present invention 16 is provided.As illustrated, the circuit diagram is single-stage
The circuit diagram of protection device.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas-discharge tube GDT, pressure
Quick resistance MOV1 and piezo-resistance MOV2 and diode D2.Compared with Fig. 6, gas-discharge tube GDT is derailing switch 11, diode D1
For the first isolator 12, piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel as the first protector 13.Its operation principle with
Fig. 5 operation principle is identical.No longer describe in detail herein.
Figure 17 is the circuit diagram for the protection device that the embodiment of the present invention 17 is provided.As illustrated, the circuit diagram is to use
The circuit diagram of the single-stage protection device of decoupling inductance.Specifically included in the circuit diagram of the single-stage protection device：Diode D1, gas
Body discharge tube GDT, piezo-resistance MOV1, piezo-resistance MOV2, diode D2 and inductance L.Compared with Fig. 6, gas-discharge tube GDT
For derailing switch 11, diode D1 is the first isolator 12, and piezo-resistance MOV1 and piezo-resistance MOV2 are connected in parallel to be protected for first
Protect device 13.Wherein, increased inductance L is decoupler in the circuit diagram.The effect of inductance L in the inductance L effect and Figure 10
It is identical, no longer describe in detail herein.
Figure 18 is the circuit diagram for the protection device that the embodiment of the present invention 18 is provided.As illustrated, the circuit diagram is two-stage
The circuit diagram of protection device.Specifically included in the circuit diagram of the two class protection device：Diode D1, gas-discharge tube GDT, pressure
Quick resistance MOV1, piezo-resistance MOV2, diode D2, inductance L, piezo-resistance MOV3 and piezo-resistance MOV4.Compared with Fig. 5,
Gas-discharge tube GDT, diode D1, piezo-resistance MOV1, piezo-resistance MOV2 composition first order protection circuit 21；Inductance L is
Decoupler 15, piezo-resistance MOV3 and piezo-resistance MOV4 are connected in parallel as the second protector 16, inductance L, piezo-resistance
MOV3 and piezo-resistance MOV4 composition second level protection circuits 22.Its operation principle is identical with Fig. 8 operation principle.Herein not
Describe in detail again.
Therefore, protection device provided in an embodiment of the present invention is straight by the way that derailing switch and the first Diode series are applied to
Flow power supply and carry out differential mode protection.Circuit residual voltage in surge impact is extremely low, special using the low residual voltage of the first isolator one-way conduction
Property realize power cathode to positive pole differential mode protect, be substantially reduced late-class circuit shunting；Using the reverse of the first isolator or
Controllable cut-off characteristics realizes the follow current interrupt of discharge tube, it is achieved thereby that the differential mode of the power supply for realizing larger magnitude is protected
Shield, can not only improve the long wave lightning protection capability of the power supply, and the protection circuit area of the device and traditional protection circuit
Compared to more than 40% can be reduced, while reliability also has greatly improved.
In addition, protection device provided in an embodiment of the present invention can apply to include the protection module of the protection device
（Surge Protection Device, SPD）In, it can also be applied in communication equipment or energy device.
Professional should further appreciate that, each example described with reference to the embodiments described herein
Unit and algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software, generally describes the composition and step of each example according to function in the above description.
These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.
Professional and technical personnel can realize described function to each specific application using distinct methods, but this realize
It is not considered that beyond the scope of this invention.
The method that is described with reference to the embodiments described herein can use hardware, computing device the step of algorithm
Software device, or the two combination are implemented.Software device can be placed in random access memory（RAM）, internal memory, read-only storage
（ROM）, electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (13)
1. a kind of protection device, it is characterised in that described device includes：Derailing switch and the first isolator；
One end of the derailing switch is connected with the negative pole of power supply or is connected with the positive pole of the power supply；
One end of first isolator is concatenated with the other end of the derailing switch；One end and the power supply when the derailing switch
Negative pole when being connected, the other end of first isolator is connected with the positive pole of the power supply；When the one of the derailing switch
When end is connected with the positive pole of the power supply, the other end of first isolator is connected with the negative pole of the power supply；
When there is negative pole surge voltage or electric current in the power supply, the first isolator conducting, and shunted with the derailing switch
The surge current, prevents the surge current from entering by protection equipment；When positive pole surge voltage or electric current occurs in the power supply
When, the first isolator cut-off does not shunt the surge current with the derailing switch.
2. protection device according to claim 1, it is characterised in that described device also includes：First protector；
First protector is connected in parallel with first isolator；First protector is connected company with the derailing switch
Connect；When there is positive pole surge voltage or electric current in the power supply, the first isolator cut-off, the derailing switch and described first
Protector shunts the surge current, prevents the surge current from entering described by protection equipment.
3. protection device according to claim 1, it is characterised in that described device also includes：First protector；
First protector, is connected in parallel with the derailing switch concatenated and the first isolator；
When there is positive pole surge voltage or electric current in the power supply, the first isolator cut-off, the first protector shunting
The surge current, prevents the surge current from entering described by protection equipment.
4. protection device according to claim 3, it is characterised in that described device also includes：Second isolator；
Second isolator is connected in series with first protector；
When there is positive pole surge voltage or electric current in the power supply, the first isolator cut-off, the second isolator conducting,
Second isolator and first protector shunt the surge current, prevent the surge current from entering described protected
Equipment.
5. protection device according to claim 1, it is characterised in that described device also includes：Decoupler；
The decoupler is connected in series in the negative pole of the power supply and described by between protection equipment, and/or is serially connected in the electricity
The positive pole in source and described by between protection equipment；
Voltage between power supply positive and negative electrode described in the decoupler partial pressure, prevents described overvoltage occur by protection equipment.
6. protection device according to claim 5, it is characterised in that described device also includes：Second protector；
Second protector, it is and described in parallel by protection equipment,
Second protector shunts surge voltage or the electric current that the power supply occurs, and prevents the surge current from entering the quilt
Protection equipment.
7. the protection device according to any one of claim 1 to 6, it is characterised in that described device also includes：Overcurrent protection
Device；
The overcurrent protector is connected in series with the derailing switch；
The overcurrent protector is used for when the protection device breaks down, and protection device is disconnected from power port, prevented
Cause power failure.
8. the protection device according to any one of claim 1 to 6, it is characterised in that the derailing switch is switching mode overvoltage
Suppression device or combination of devices or the circuit that switching mode over-voltage protector function can be realized.
9. protection device according to claim 8, it is characterised in that the derailing switch is that gas-discharge tube or transient state suppress
IGCT or other switching mode over-voltage suppression devices.
10. the protection device according to any one of claim 1 to 6, it is characterised in that first isolator or the second list
To the combination that device is one-way type device or one-way type device or the circuit with identical function.
11. protection device according to claim 10, it is characterised in that the one-way type device be diode or metal-
Oxidc-Semiconductor metal-oxide-semiconductor or the device with identical characteristic.
12. the protection device according to any one of claim 1 to 6, it is characterised in that first protector and second is protected
Protect the combination that device is over-voltage protector or over-voltage protector.
13. protection device according to claim 12, it is characterised in that the over-voltage protector is piezo-resistance or wink
State suppresses diode or the device with identical characteristic.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426131.7A CN103795045B (en) | 2012-10-31 | 2012-10-31 | Protection device |
| PCT/CN2013/074806 WO2014067272A1 (en) | 2012-10-31 | 2013-04-26 | Protective apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210426131.7A CN103795045B (en) | 2012-10-31 | 2012-10-31 | Protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103795045A CN103795045A (en) | 2014-05-14 |
| CN103795045B true CN103795045B (en) | 2017-08-18 |
Family
ID=50626402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210426131.7A Active CN103795045B (en) | 2012-10-31 | 2012-10-31 | Protection device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103795045B (en) |
| WO (1) | WO2014067272A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956387A (en) * | 2014-05-15 | 2014-07-30 | 安徽芯旭半导体有限公司 | Surge protection device |
| CN104269835A (en) * | 2014-09-19 | 2015-01-07 | 华为技术有限公司 | Protection device, electronic equipment and power supply |
| CN104218562A (en) * | 2014-09-30 | 2014-12-17 | 成都思迈科技发展有限责任公司 | Direct-current power source lightning protection circuit |
| CN105140900A (en) * | 2015-09-09 | 2015-12-09 | 成都川睿科技有限公司 | Lightning protection power socket of intelligent traffic system |
| CN106786459B (en) * | 2016-12-28 | 2020-02-04 | 深圳市槟城电子有限公司 | Surge protection circuit and electronic device using same |
| CN109950888A (en) * | 2017-12-20 | 2019-06-28 | 东莞市阿甘半导体有限公司 | A kind of direct current protection circuit and electronic equipment |
| CN116191384A (en) * | 2021-11-29 | 2023-05-30 | 中兴通讯股份有限公司 | Lightning stroke protection method, lightning stroke protection device, power module and base station |
| CN117374899B (en) * | 2023-10-20 | 2024-04-30 | 中科智寰(北京)科技有限公司 | DC power grid feed-in protection device with lightning protection function |
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| CN2842835Y (en) * | 2005-11-01 | 2006-11-29 | 董春雷 | The two-way prevention siganl thunder-proof device |
| CN201167385Y (en) * | 2008-03-13 | 2008-12-17 | 北京光桥时代科技有限公司 | Full-path bidirectional optical transmitter-receiver for restraining multilayer lightning protection wall audio-video data |
| CN201860100U (en) * | 2010-11-15 | 2011-06-08 | 南京普天鸿雁电器科技有限公司 | Surge protector for high definition monitoring camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2812338Y (en) * | 2005-03-14 | 2006-08-30 | 四川康姆逊电磁防护有限责任公司 | Protective coaxial connector |
| US7679878B2 (en) * | 2007-12-21 | 2010-03-16 | Broadcom Corporation | Capacitor sharing surge protection circuit |
| CN202142851U (en) * | 2011-08-05 | 2012-02-08 | 东莞市毅豪电子科技有限公司 | Gun-type camera overvoltage protection circuit |
| CN102709902A (en) * | 2012-05-31 | 2012-10-03 | 华为技术有限公司 | Surge current protection device |
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2012
- 2012-10-31 CN CN201210426131.7A patent/CN103795045B/en active Active
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2013
- 2013-04-26 WO PCT/CN2013/074806 patent/WO2014067272A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842835Y (en) * | 2005-11-01 | 2006-11-29 | 董春雷 | The two-way prevention siganl thunder-proof device |
| CN201167385Y (en) * | 2008-03-13 | 2008-12-17 | 北京光桥时代科技有限公司 | Full-path bidirectional optical transmitter-receiver for restraining multilayer lightning protection wall audio-video data |
| CN201860100U (en) * | 2010-11-15 | 2011-06-08 | 南京普天鸿雁电器科技有限公司 | Surge protector for high definition monitoring camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103795045A (en) | 2014-05-14 |
| WO2014067272A1 (en) | 2014-05-08 |
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