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 PDF

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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
Authority
CN
China
Prior art keywords
comparator
power supply
triode
logical
gate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710511798.XA
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Chinese (zh)
Inventor
杨益金
汪庆运
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Shangshuo New Energy Co Ltd
Original Assignee
Hefei Shangshuo New Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Shangshuo New Energy Co Ltd filed Critical Hefei Shangshuo New Energy Co Ltd
Priority to CN201710511798.XA priority Critical patent/CN107294058A/en
Publication of CN107294058A publication Critical patent/CN107294058A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40Testing power supplies
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/04Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08Emergency 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24Emergency 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

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

A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply
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.
CN201710511798.XA 2017-06-27 2017-06-27 A kind of overvoltage undervoltage detection circuit applied to solar energy power accumulating power supply Pending CN107294058A (en)

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

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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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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200985359Y (en) * 2006-10-27 2007-12-05 中国铝业股份有限公司 Aluminium electrolytic tank controlling machine hardware over/under voltage protector
CN201349072Y (en) * 2008-12-22 2009-11-18 南京邮电大学 High-accuracy over-current protecting socket
CN204405727U (en) * 2014-12-26 2015-06-17 武汉泓承科技有限公司 A kind ofly inputted/the circuit of under-voltage detection for electronic equipment
CN105977905A (en) * 2016-07-04 2016-09-28 西安电子科技大学 Overcurrent and overvoltage-undervoltage drive protection system based on SiC MOSFET
CN206057532U (en) * 2016-09-29 2017-03-29 广州视源电子科技股份有限公司 A kind of power detecting equipment and vehicle carried video system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200985359Y (en) * 2006-10-27 2007-12-05 中国铝业股份有限公司 Aluminium electrolytic tank controlling machine hardware over/under voltage protector
CN201349072Y (en) * 2008-12-22 2009-11-18 南京邮电大学 High-accuracy over-current protecting socket
CN204405727U (en) * 2014-12-26 2015-06-17 武汉泓承科技有限公司 A kind ofly inputted/the circuit of under-voltage detection for electronic equipment
CN105977905A (en) * 2016-07-04 2016-09-28 西安电子科技大学 Overcurrent and overvoltage-undervoltage drive protection system based on SiC MOSFET
CN206057532U (en) * 2016-09-29 2017-03-29 广州视源电子科技股份有限公司 A kind of power detecting equipment and vehicle carried video system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110069093A (en) * 2018-01-24 2019-07-30 丰田自动车株式会社 Power control
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
CN109342973B (en) * 2018-11-19 2022-01-18 中车大连电力牵引研发中心有限公司 Direct current power supply input state monitoring circuit and system
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
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
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

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Application publication date: 20171024