CN107294058A - A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply - Google Patents
A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply Download PDFInfo
- Publication number
- CN107294058A CN107294058A CN201710511798.XA CN201710511798A CN107294058A CN 107294058 A CN107294058 A CN 107294058A CN 201710511798 A CN201710511798 A CN 201710511798A CN 107294058 A CN107294058 A CN 107294058A
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- Prior art keywords
- comparator
- power supply
- triode
- logical
- gate
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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
- H02H3/24—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 responsive to undervoltage or no-voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
-
- 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
- H02H3/08—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 responsive to excess current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply, over-pressed detection is carried out to supply voltage by first comparator, under-voltage detection is carried out to supply voltage by the second comparator.The base stage of the output end connecting triode of logical AND gate, so that, when only logical AND gate exports high level, triode could be turned on.And logical AND gate is normally that first comparator and the second comparator could export high level when exporting high level 1 only in voltage.In this way, in the present invention, realized by first comparator, the second comparator and logical AND gate, when supply voltage is normal, triode ON；When supply voltage is over-pressed or under-voltage, triode cut-off.And, by the break-make of triode, the power supply of controllable power incoming end is exported, and controls the work of light emitting diode.
Description
Technical field
The present invention relates to voltage detecting technical field, more particularly to a kind of over-and under-voltage applied to solar energy power accumulating power supply
Detect circuit.
Background technology
In solar power supply circuit, due to solar energy real-time change, so, it is difficult to ensure that with the electric power storage electricity of solar charging energy
The voltage stabilization in source.If supply voltage is over-pressed, easily damage circuit element and load is dangerous big；If supply voltage
It is under-voltage, then it is difficult to ensure that circuit normal work.So, supply voltage is detected, is essential list in power supply circuit
Member.
Conventional voltage detecting circuit is mostly analog circuit at present, and the circuit components of composition are more, complicated, and reliably
Property and service life are all difficult to ensure that.
The content of the invention
The technical problem existed based on background technology, the present invention proposes a kind of overvoltage applied to solar energy power accumulating power supply
Undervoltage detection circuit.
A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply proposed by the present invention, including：Plant-grid connection
End, power supply output end, first comparator, the second comparator, logical AND gate, N-type triode, p channel transistor and light-emitting diodes
Pipe；
The over-pressed reference value of first input end access of first comparator, its second input connection power access end；When
Two input terminal voltage values are less than first input end magnitude of voltage, first comparator output high level, conversely, output low level；
The first input end connection power access end of second comparator, its second input accesses under-voltage reference value；When
Two input terminal voltage values are less than first input end magnitude of voltage, the second comparator output high level, conversely, output low level；
The output end of first comparator and the output end of the second comparator connect two inputs of logical AND gate respectively, patrol
Collect and access high level with the remaining input of door；The base stage of the output end connecting triode of logical AND gate, transistor emitter
Connecting luminous diode positive pole, its negative pole ground connection；Transistor collector connects transistor gate, transistor drain and source electrode difference
Connect power access end and power supply output end.
Preferably, in addition to first resistor, first resistor connection power access end, the other end connects first comparator respectively
Second input and the second comparator first input end.
Preferably, first comparator and the second comparator use operational amplifier.
Preferably, branch road where light emitting diode is in series with second resistance.
Preferably, trigger is connected between logical AND gate and triode, the excitation end connection logical AND gate of trigger
Output end, the base stage of the output end connecting triode of trigger.
In the present invention, over-pressed detection is carried out to supply voltage by first comparator, by the second comparator to power supply electricity
Pressure carries out under-voltage detection.The base stage of the output end connecting triode of logical AND gate, so that, only logical AND gate exports high level
When, triode could be turned on.And logical AND gate is normally that first comparator and the second comparator export high electricity only in voltage
High level could be exported when flat 1.In this way, in the present invention, realized by first comparator, the second comparator and logical AND gate,
When supply voltage is normal, triode ON；When supply voltage is over-pressed or under-voltage, triode cut-off.And, pass through triode
Break-make, the power supply output of controllable power incoming end and controls the work of light emitting diode.
The present invention, is realized, when supply voltage is normal, and power access end normal power supply, light emitting diode is lighted；Conversely,
When supply voltage is over-pressed or under-voltage, power access end cut-out power supply output, light emitting diode light-off is indicated.In this way,
Pass through triode and transistor, it is ensured that power supply safety, power supply output state can be grasped in real time by light emitting diode.
Brief description of the drawings
Fig. 1 is a kind of overvoltage undervoltage detection circuit connection figure applied to solar energy power accumulating power supply proposed by the present invention.
Embodiment
Reference picture 1, a kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply proposed by the present invention, including：
Power access end Vin, power supply output end vo ut, first comparator OP1, the second comparator OP2, logical AND gate LA1, the pole of N-type three
Pipe Q1, p channel transistor Q2 and light emitting diode D1.
The first comparator OP1 over-pressed reference value RF1 of first input end access, its second input connection power access end
Vin；When the second input terminal voltage value is less than first input end magnitude of voltage, first comparator OP1 output high level, conversely, output
Low level.In present embodiment, by first comparator OP1 using over-pressed reference value RF1 as criterion, when supply voltage is excessive
When, first comparator OP1 output low levels 0；If supply voltage is normal, first comparator OP1 output high level 1.
Second comparator OP2 first input end connection power access end Vin, its second input accesses under-voltage reference value
RF2；When the second input terminal voltage value is less than first input end magnitude of voltage, the second comparator OP2 output high level, conversely, output
Low level.In present embodiment, by the second comparator OP2 using under-voltage reference value RF2 as criterion, when supply voltage is too small
When, the second comparator OP2 output low levels 0；If supply voltage is normal, the second comparator OP2 output high level 1.
First comparator OP1 output end and the second comparator OP2 output end connect two of logical AND gate LA1 respectively
Input, the remaining inputs of logical AND gate LA1 access high level.In order to simplify in circuit, present embodiment, using 2 tunnels
The logical AND gate of input, it is connected after first comparator OP1 and the second comparator OP2 without remaining input.
The output end connecting triode Q1 of logical AND gate base stage, so that, during only logical AND gate LA1 output high level,
Triode Q1 could be turned on.And logical AND gate LA1 is normally that first comparator OP1 and the second comparator OP2 is equal only in voltage
High level could be exported during output high level 1.That is, in present embodiment, when supply voltage is normal, triode Q1 conductings；When
When supply voltage is over-pressed or under-voltage, triode Q1 cut-offs.
In present embodiment, trigger, the excitation end connection of trigger are connected between logical AND gate LA1 and triode Q1
The output end of logical AND gate, the output end connecting triode Q1 of trigger base stage.In this way, by accessing trigger, can pass through
The high level excitation trigger output end of logical AND gate LA1 outputs exports the level of higher voltage high triode Q1 base stages.
The access of trigger, is conducive to expanding triode Q1 range of choice.
Triode Q1 emitter stage connecting luminous diode D1 positive poles, its negative pole ground connection.Triode Q1 colelctor electrodes connect crystal
Pipe Q2 grids, transistor Q2 drain electrodes and source electrode connect power access end Vin and power supply output end vo ut respectively.
When triode Q1 conductings, transistor Q2 grounded-grids, so as to turn on, power access end Vin by transistor Q2 to
Power supply output end vo ut powers, and light emitting diode D1 obtains electric light.When triode Q1 cut-offs, transistor Q2 grids are hanging so as to cut
Only, and cut off the electricity supply incoming end Vin to power supply output end vo ut power, light emitting diode D1 dead electricity turn off the light.
When it is implemented, the detection circuit, which also includes first resistor R1, carries out partial pressure, first resistor R1 one end connection power supply
Incoming end, the other end connects the inputs of first comparator OP1 second and the second comparator OP2 first input ends respectively.First electricity
Hinder R1 setting, it is ensured that first comparator OP1 and the second comparator OP2 work safety.The ratios of first comparator OP1 and second
Operational amplifier can be used compared with device OP2.
When it is implemented, branch road where light emitting diode D1 is in series with second resistance R2, to draw high voltage, it is ensured that luminous two
Pole pipe D1 normal works.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply, it is characterised in that including：Power access end
(Vin), power supply output end (Vout), first comparator (OP1), the second comparator (OP2), logical AND gate (LA1), the pole of N-type three
Manage (Q1), p channel transistor (Q2) and light emitting diode (D1)；
The over-pressed reference value (RF1) of first input end access of first comparator (OP1), its second input connection power access end
(Vin)；When the second input terminal voltage value is less than first input end magnitude of voltage, first comparator (OP1) exports high level, conversely,
Export low level；
The first input end connection power access end (Vin) of second comparator (OP2), its second input accesses under-voltage reference value
(RF2)；When the second input terminal voltage value is less than first input end magnitude of voltage, the second comparator (OP2) exports high level, conversely,
Export low level；
The output end of first comparator (OP1) and the output end of the second comparator (OP2) connect the two of logical AND gate (LA1) respectively
Individual input, logical AND gate (LA1) remaining input accesses high level；The output end connecting triode (Q1) of logical AND gate
Base stage, triode (Q1) emitter stage connecting luminous diode (D1) positive pole, its negative pole ground connection；Triode (Q1) colelctor electrode is connected
Transistor (Q2) grid, transistor (Q2) drain electrode and source electrode connect power access end (Vin) and power supply output end (Vout) respectively.
2. the overvoltage undervoltage detection circuit of solar energy power accumulating power supply is applied to as claimed in claim 1, it is characterised in that also wrapped
Include first resistor (R1), first resistor (R1) one end connection power access end, the other end connects first comparator (OP1) the respectively
Two inputs and the second comparator (OP2) first input end.
3. the overvoltage undervoltage detection circuit of solar energy power accumulating power supply is applied to as claimed in claim 2, it is characterised in that first
Comparator (OP1) and the second comparator (OP2) use operational amplifier.
4. the overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply as described in any one of claims 1 to 3, its feature
It is, branch road where light emitting diode (D1) is in series with second resistance (R2).
5. the overvoltage undervoltage detection circuit of solar energy power accumulating power supply is applied to as claimed in claim 1, it is characterised in that logic
Trigger is connected between door (LA1) and triode (Q1), the excitation end of trigger connects the output end of logical AND gate, triggering
The base stage of the output end connecting triode (Q1) of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710511798.XA CN107294058A (en) | 2017-06-27 | 2017-06-27 | A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710511798.XA CN107294058A (en) | 2017-06-27 | 2017-06-27 | A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply |
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|---|---|
| CN107294058A true CN107294058A (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710511798.XA Pending CN107294058A (en) | 2017-06-27 | 2017-06-27 | A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
| CN108512399A (en) * | 2018-05-23 | 2018-09-07 | 成都四威功率电子科技有限公司 | A kind of enabled control circuit for Switching Power Supply |
| CN108683153A (en) * | 2018-07-24 | 2018-10-19 | 深圳市泛海三江电子股份有限公司 | Protection circuit capable of automatically recovering |
| CN109342973A (en) * | 2018-11-19 | 2019-02-15 | 中车大连电力牵引研发中心有限公司 | DC supply input status monitoring circuit and system |
| CN110069093A (en) * | 2018-01-24 | 2019-07-30 | 丰田自动车株式会社 | Power control |
| CN110596448A (en) * | 2019-09-25 | 2019-12-20 | 南京亚派科技股份有限公司 | Simple detection circuit for IO port drive level undervoltage |
| CN110736933A (en) * | 2019-10-22 | 2020-01-31 | 四川甘华电源科技有限公司 | digital power supply output voltage under-voltage detection method |
| CN113258534A (en) * | 2021-06-23 | 2021-08-13 | 中关村芯海择优科技有限公司 | Power converter and protection circuit thereof |
| CN116112002A (en) * | 2023-04-12 | 2023-05-12 | 长鑫存储技术有限公司 | Comparison circuit |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110069093A (en) * | 2018-01-24 | 2019-07-30 | 丰田自动车株式会社 | Power control |
| CN108318730A (en) * | 2018-03-30 | 2018-07-24 | 成都众宜天成科技有限公司 | A kind of communication power supply voltage detecting circuit |
| CN108512399A (en) * | 2018-05-23 | 2018-09-07 | 成都四威功率电子科技有限公司 | A kind of enabled control circuit for Switching Power Supply |
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| CN109342973A (en) * | 2018-11-19 | 2019-02-15 | 中车大连电力牵引研发中心有限公司 | DC supply input status monitoring circuit and system |
| CN110596448A (en) * | 2019-09-25 | 2019-12-20 | 南京亚派科技股份有限公司 | Simple detection circuit for IO port drive level undervoltage |
| CN110736933B (en) * | 2019-10-22 | 2021-07-20 | 四川甘华电源科技有限公司 | Digital power supply output voltage under-voltage detection method |
| CN110736933A (en) * | 2019-10-22 | 2020-01-31 | 四川甘华电源科技有限公司 | digital power supply output voltage under-voltage detection method |
| CN113258534A (en) * | 2021-06-23 | 2021-08-13 | 中关村芯海择优科技有限公司 | Power converter and protection circuit thereof |
| CN116112002A (en) * | 2023-04-12 | 2023-05-12 | 长鑫存储技术有限公司 | Comparison circuit |
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Application publication date: 20171024 |