CN107425599A - Surge protection circuit for power compensator - Google Patents
Surge protection circuit for power compensator Download PDFInfo
- Publication number
- CN107425599A CN107425599A CN201710820443.9A CN201710820443A CN107425599A CN 107425599 A CN107425599 A CN 107425599A CN 201710820443 A CN201710820443 A CN 201710820443A CN 107425599 A CN107425599 A CN 107425599A
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- Prior art keywords
- resistance
- switch
- discharge
- module
- switch module
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Classifications
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The invention provides a kind of surge protection circuit for power compensator, including：Switch module, its positive terminal are used to be connected to power compensator, and its negative pole end is used for the positive pole for being connected to load；Charge-discharge modules, its power supply/discharge end are connected to switch module and the connecting node of load；Monitoring module, its first detection input are connected to the connecting node of switch module and power compensator, to detect power compensator to the direct power supply magnitude of voltage size of load input；Second detection input of monitoring module is connected to switch module and the connecting node of load, to detect discharge voltage value size of the charge-discharge modules as load supplying；The control output end of monitoring module is connected to the control terminal of switch module.This be used for power compensator surge protection circuit solve the problems, such as in the prior art can not in overvoltage proof load normal use.
Description
Technical field
The present invention relates to power compensator, and in particular to a kind of surge protection circuit for power compensator.
Background technology
In the prior art, surge protection circuit includes detection module and switch module, and power compensator passes through switching molding
Block is connected to detects the detection voltage to load in real time to load, detection module, and switch module switches on power when normal voltage
Compensator and load, the branch road that detection module command switch module deenergization compensator is formed with load when voltage is excessive,
Although when the surge protection circuit realizes normal normally for load supplying and it is over-pressed when stop loaded electricity, usually make
Used time needs to continue as load supplying, and to enable load to remain able to normal use in overvoltage, and prior art can not
Realize.
The content of the invention
The invention provides a kind of surge protection circuit for power compensator, and solving in the prior art can not be in mistake
During pressure the problem of proof load normal use.
To achieve the above object, present invention employs following technical scheme：
A kind of surge protection circuit for power compensator, including：
Switch module, its positive terminal are used to be connected to power compensator, and its negative pole end is used for the positive pole for being connected to load；
Charge-discharge modules, its power supply/discharge end are connected to switch module and the connecting node of load；
Monitoring module, its first detection input are connected to the connecting node of switch module and power compensator, with detection
Direct power supply magnitude of voltage size of the power compensator to load input；Second detection input of monitoring module is connected to switch module
With the connecting node of load, to detect discharge voltage value size of the charge-discharge modules as load supplying；The control of monitoring module is defeated
Go out the control terminal that end is connected to switch module, with according to the direct power supply magnitude of voltage size and discharge voltage value size control detected
Switch module opening and closing power compensator processed is load supplying circuit.
Preferably, charge-discharge modules include charge and discharge capacitance, charge and discharge capacitance just extremely the power supply of charge-discharge modules/
Discharge end, the negative pole ground connection of charge and discharge capacitance.
Preferably, switch module includes P-channel metal-oxide-semiconductor, and the grid of P-channel metal-oxide-semiconductor is the control terminal of switch module, P
The source electrode of channel MOS tube is the positive terminal of switch module, and the drain electrode of P-channel metal-oxide-semiconductor is the negative pole end of switch module.
Preferably, monitoring module includes detection unit and control unit；
Detection unit includes：First resistor, second resistance, first switch triode, 3rd resistor, the 4th resistance, voltage stabilizing
Electric capacity and the 5th resistance, first resistor one end are the first detection input of monitoring module, and the first resistor other end is connected to
Second resistance one end, the second resistance other end are connected to the colelctor electrode of first switch triode, the transmitting of first switch triode
Pole is grounded, and the base stage of first switch triode is grounded by 3rd resistor, and the 4th resistance one end is connected to first switch triode
Base stage, the 4th resistance other end ground connection, electric capacity of voltage regulation positive pole is connected to the base stage of first switch triode, electric capacity of voltage regulation negative pole
Ground connection, the 5th resistance one end are connected to the base stage of first switch triode, and the 5th resistance other end is examined for the second of monitoring module
Survey input；
Control unit includes：6th resistance, the 7th resistance and second switch triode, the 6th resistance one end are connected to out
The positive terminal of module is closed, the 6th resistance other end is connected to the control terminal of switch module and is connected with the 7th resistance one end, and the 7th
The resistance other end is grounded, and the emitter stage of second switch triode is connected to the positive terminal of switch module, second switch triode
Base stage is connected to the connecting node of first resistor and second resistance, the control of the current collection extremely monitoring module of second switch triode
Output end.
Preferably, switch module also includes protection diode, and the anode of protection diode is connected to P-channel metal-oxide-semiconductor
Grid, the negative electrode of protection diode are connected to the source electrode of P-channel metal-oxide-semiconductor.
Compared to prior art, the present invention has the advantages that：
When power compensator provides normal working voltage for load, switch module closure, it is supported on power compensator and carries
Normal operation under the voltage of confession, while power compensator charges also to charge-discharge modules input voltage to charge-discharge modules,
In case after discharge, monitoring module detects the direct power supply magnitude of voltage size that power compensator provides in real time during this；Work as prison
Control module (that is to say surge situation occur) when detecting that direct power supply magnitude of voltage is excessive, and monitoring module controlling switch module disconnects,
Now charge-discharge modules are immediately to load discharge, and to maintain the normal work of load, the discharge time of certain charge-discharge modules has
Limit, the surge duration is also limited, therefore can keep balancing to a certain extent, and in discharge process, monitoring module is also real
When the detection charge-discharge modules discharge voltage values that provide, when discharge voltage value is too small, monitoring module is with regard to controlling switch mould
Block closes, and is embodied as load supplying again and is charged for charge-discharge modules, it is load supplying state to be again restored to normal, monitoring
Module detects in real time, to wait surge phenomenon appearance next time.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the surge protection circuit for power compensator；
Fig. 2 is the circuit theory diagrams of the surge protection circuit for power compensator.
Embodiment
As shown in figure 1, the present invention proposes a kind of surge protection circuit for power compensator, including：
Switch module, its positive terminal are used to be connected to power compensator, and its negative pole end is used for the positive pole for being connected to load；
Charge-discharge modules, its power supply/discharge end are connected to switch module and the connecting node of load；
Monitoring module, its first detection input are connected to the connecting node of switch module and power compensator, with detection
Direct power supply magnitude of voltage size of the power compensator to load input；Second detection input of monitoring module is connected to switch module
With the connecting node of load, to detect discharge voltage value size of the charge-discharge modules as load supplying；The control of monitoring module is defeated
Go out the control terminal that end is connected to switch module, with according to the direct power supply magnitude of voltage size and discharge voltage value size control detected
Switch module opening and closing power compensator processed is load supplying circuit.
As shown in Fig. 2 for the simple and easy to use charge-discharge modules of design structure, charge-discharge modules include discharge and recharge
Electric capacity C1, charge and discharge capacitance C1 just extremely power supply/discharge end of charge-discharge modules, charge and discharge capacitance C1 negative pole ground connection.By
It is stable in charge and discharge capacitance C1 charging/discharging function, therefore the normal operation of charging/discharging function and charge and discharge capacitance C1 can be ensured
It is cheap, be advantageous to cost-effective.
As shown in Fig. 2 switch module includes P-channel metal-oxide-semiconductor Q1, P-channel metal-oxide-semiconductor Q1 grid is the control of switch module
End, P-channel metal-oxide-semiconductor Q1 source electrode are the positive terminal VS of switch module, and P-channel metal-oxide-semiconductor Q1 drain electrode is the negative pole of switch module
Hold VIN.This load service condition is low power condition, therefore uses P-channel metal-oxide-semiconductor Q1, and needs source electrode connection power supply compensation
The VCC voltages that device provides, need further exist for using P-channel metal-oxide-semiconductor Q1.
As shown in Fig. 2 in order to realize to direct power supply magnitude of voltage and the detection of discharge voltage value and according to detection controlling switch
The opening and closing of module, monitoring module include detection unit and control unit；
Detection unit includes：First resistor R1, second resistance R2, first switch triode Q1,3rd resistor R3, the 4th electricity
Hinder the first detection input that R4, electric capacity of voltage regulation C2 and the 5th resistance R5, first resistor R1 one end are monitoring module, the first electricity
The resistance R1 other ends are connected to second resistance R2 one end, and the second resistance R2 other ends are connected to first switch triode Q1 current collection
Pole, first switch triode Q1 grounded emitter, first switch triode Q1 base stage are grounded by 3rd resistor R3, and the 4th
Resistance R4 one end is connected to first switch triode Q1 base stage, the 4th resistance R4 other ends ground connection, and electric capacity of voltage regulation C2 positive poles connect
First switch triode Q1 base stage is connected to, electric capacity of voltage regulation C2 negative poles ground connection, the 5th resistance R5 one end is connected to first switch three
Pole pipe Q1 base stage, the 5th resistance R5 other ends are the second detection input of monitoring module；
Control unit includes：6th resistance R6, the 7th resistance R7 and second switch triode Q3, the 6th resistance R6 one end
Be connected to the positive terminal VS of switch module, the 6th resistance R6 other ends be connected to the control terminal of switch module and with the 7th resistance R7
One end is connected, and the 7th resistance R7 other ends ground connection, second switch triode Q3 emitter stage is connected to the positive terminal of switch module
VS, second switch triode Q3 base stage are connected to first resistor R1 and second resistance R2 connecting node, the pole of second switch three
The control output end of pipe Q3 current collection extremely monitoring module.
When direct power supply magnitude of voltage is normal, due to the 5th resistance R5 resistance be 100k Europe, 3rd resistor R3 resistance be
2k Europe and the 4th resistance R4 resistance are 10k Europe, and the 4th resistance R4 is in parallel with 3rd resistor R3, therefore the 4th of detection unit the electricity
Resistance R4 and the 5th resistance R5 partial pressure values are less than first switch triode Q1 base-on voltages, first switch triode Q1 cut-offs；
And the magnitude of voltage of second switch triode Q3 base stages is drawn high by first resistor R1, second switch triode Q3 is also switched off；Now, by
Acted in the 6th resistance R6 and the 7th resistance R7 partial pressure so that voltage difference is more than it between P-channel metal-oxide-semiconductor Q1 grids and source electrode
Required voltage difference is turned on, therefore P-channel metal-oxide-semiconductor Q1 is turned on, power compensator is by P-channel metal-oxide-semiconductor Q1 to electrical equipment etc.
Load normal power supply.
When direct power supply magnitude of voltage overvoltage, first, charge and discharge capacitance C1 is charged, charge and discharge capacitance C1 cathode voltages
Rise, when voltage rises above overvoltage protection magnitude of voltage, the 4th resistance R4 and 3rd resistor R3 partial pressure value are more than first
Switch triode Q1 base-on voltages, first switch triode Q1 conductings；Then, leading due to first switch triode Q1
It is logical so that branch road where first resistor R1 and second resistance R2 forms current supply circuit, and first resistor R1 resistances are 100k Europe and the
Two resistance R2 resistances are 1.1k Europe, and the magnitude of voltage that second resistance R2 partial pressures obtain is the voltage of second switch triode Q3 base stages
Value, reduce the magnitude of voltage of second switch triode Q3 base stages so that second switch triode Q3 is turned on, second switch triode
Q3 connection, allow for P-channel metal-oxide-semiconductor Q1 grid access magnitude of voltage it is equal with the magnitude of voltage that its source electrode accesses, P-channel
Basic no-voltage is poor between metal-oxide-semiconductor Q1 gate voltage values and source voltage values, causes P-channel metal-oxide-semiconductor Q1 to end deenergization,
Now power supply for electrical equipment is maintained by charge and discharge capacitance C1.Terminal voltage, which is released, when charge and discharge capacitance C1 electricity drops to normal model
When enclosing interior, 3rd resistor R3 and the 4th resistance R4 partial pressure values are less than first switch triode Q1 base-on voltages, first switch
Triode Q1 ends, and second switch triode Q3 ends immediately, P-channel metal-oxide-semiconductor Q1 conductings, recovers power supply power supply.Voltage is again
Charged to charge and discharge capacitance C1 so that first switch triode Q1 conductings and then second switch triode Q3 conductings, P-channel MOS
Pipe Q1 ends deenergization.So repeatedly, until voltage drops to normal voltage value.
As shown in Fig. 2 switch module also includes protection diode D1, protection diode D1 anode is connected to P-channel MOS
Pipe Q1 grid, protection diode D1 negative electrode are connected to P-channel metal-oxide-semiconductor Q1 source electrode.By setting protection diode D1, limit
P-channel metal-oxide-semiconductor Q1 source electrodes processed to grid pressure difference within the specific limits, avoid because of the pressure difference of P-channel metal-oxide-semiconductor Q1 source electrodes to grid
It is excessive and cause P-channel metal-oxide-semiconductor Q1 to damage, punish severely P-channel metal-oxide-semiconductor Q1 service life.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (5)
- A kind of 1. surge protection circuit for power compensator, it is characterised in that including：Switch module, its positive terminal are used to be connected to power compensator, and its negative pole end is used for the positive pole for being connected to load；Charge-discharge modules, its power supply/discharge end are connected to switch module and the connecting node of load；Monitoring module, its first detection input are connected to the connecting node of switch module and power compensator, to detect power supply Direct power supply magnitude of voltage size of the compensator to load input；Second detection input of monitoring module is connected to switch module with bearing The connecting node of load, to detect discharge voltage value size of the charge-discharge modules as load supplying；The control output end of monitoring module The control terminal of switch module is connected to, to be opened according to direct power supply magnitude of voltage size and discharge voltage value the size control detected It is load supplying circuit to close module opening and closing power compensator.
- 2. the surge protection circuit according to claim 1 for power compensator, it is characterised in that charge-discharge modules bag Include charge and discharge capacitance, just extremely power supply/discharge end of charge-discharge modules of charge and discharge capacitance, the negative pole ground connection of charge and discharge capacitance.
- 3. the surge protection circuit according to claim 1 or 2 for power compensator, it is characterised in that switch module Including P-channel metal-oxide-semiconductor, the grid of P-channel metal-oxide-semiconductor is the control terminal of switch module, and the source electrode of P-channel metal-oxide-semiconductor is switch module Positive terminal, P-channel metal-oxide-semiconductor drain electrode for switch module negative pole end.
- 4. the surge protection circuit according to claim 3 for power compensator, it is characterised in that monitoring module includes Detection unit and control unit；Detection unit includes：First resistor, second resistance, first switch triode, 3rd resistor, the 4th resistance, electric capacity of voltage regulation And the 5th resistance, first resistor one end are the first detection input of monitoring module, the first resistor other end is connected to second Resistance one end, the second resistance other end are connected to the colelctor electrode of first switch triode, and the emitter stage of first switch triode connects Ground, the base stage of first switch triode are grounded by 3rd resistor, and the 4th resistance one end is connected to the base of first switch triode Pole, the 4th resistance other end ground connection, electric capacity of voltage regulation positive pole are connected to the base stage of first switch triode, and electric capacity of voltage regulation negative pole connects Ground, the 5th resistance one end are connected to the base stage of first switch triode, and the 5th resistance other end detects for the second of monitoring module Input；Control unit includes：6th resistance, the 7th resistance and second switch triode, the 6th resistance one end are connected to switching molding The positive terminal of block, the 6th resistance other end are connected to the control terminal of switch module and are connected with the 7th resistance one end, the 7th resistance The other end is grounded, and the emitter stage of second switch triode is connected to the positive terminal of switch module, the base stage of second switch triode It is connected to the connecting node of first resistor and second resistance, the control output of the current collection extremely monitoring module of second switch triode End.
- 5. the surge protection circuit according to claim 4 for power compensator, it is characterised in that switch module also wraps Protection diode is included, the anode of protection diode is connected to the grid of P-channel metal-oxide-semiconductor, and the negative electrode of protection diode is connected to P ditches The source electrode of road metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710820443.9A CN107425599B (en) | 2017-09-13 | 2017-09-13 | Surge protection circuit for power supply compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710820443.9A CN107425599B (en) | 2017-09-13 | 2017-09-13 | Surge protection circuit for power supply compensator |
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| CN107425599A true CN107425599A (en) | 2017-12-01 |
| CN107425599B CN107425599B (en) | 2023-06-27 |
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| CN201710820443.9A Active CN107425599B (en) | 2017-09-13 | 2017-09-13 | Surge protection circuit for power supply compensator |
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Cited By (2)
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| WO2024016943A1 (en) * | 2022-07-21 | 2024-01-25 | 宁波市思虎电子科技有限公司 | Electrode reversing method of unstable power supply-based electrode device |
| CN117578699A (en) * | 2024-01-17 | 2024-02-20 | 江苏联康信息股份有限公司 | Uninterrupted switching load power supply system based on two paths of power supplies |
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| Publication number | Publication date |
|---|---|
| CN107425599B (en) | 2023-06-27 |
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