CN103812088A - Electricity-taking protection device - Google Patents

Electricity-taking protection device Download PDF

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Publication number
CN103812088A
CN103812088A CN201210449645.4A CN201210449645A CN103812088A CN 103812088 A CN103812088 A CN 103812088A CN 201210449645 A CN201210449645 A CN 201210449645A CN 103812088 A CN103812088 A CN 103812088A
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China
Prior art keywords
resistance
circuit
oxide
semiconductor
metal
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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
CN201210449645.4A
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Chinese (zh)
Inventor
陈权
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.)
Suzhou Industrial Park New Hongbo Communication Technology Co Ltd
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Suzhou Industrial Park New Hongbo Communication Technology Co Ltd
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Priority to CN201210449645.4A priority Critical patent/CN103812088A/en
Publication of CN103812088A publication Critical patent/CN103812088A/en
Pending legal-status Critical Current

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Abstract

The invention provides an electricity-taking protection device. The electricity-taking protection device comprises a power source, an anti-reverse-connection circuit, a voltage dividing following circuit, an operation amplifier power supply circuit, a constant flow source circuit, an image current source circuit, a window comparator, a reverse direction circuit and a final stage switch circuit, wherein the anti-reverse-connection circuit, the voltage dividing following circuit, the constant flow source circuit, the image current source circuit, the reverse direction circuit and the final stage switch circuit are respectively connected in parallel with an anode and a cathode of the power source, the operation amplifier power supply circuit is connected between the anode of the power source and the voltage dividing following circuit and is in grounding connection through a voltage stabilization tube, an input end of the window comparator is connected with the image current source circuit, and an output end of the window comparator is connected with the reverse direction circuit. Compared with the prior art, in a reverse-connection, overvoltage or undervoltage state of the power source, electricity taking is not permitted to protect equipment for safe operation.

Description

Electricity-fetching protection device
Technical field
The present invention relates to field industrial control field, relate in particular to the electricity-fetching protection device of industrial control field.
Background technology
In the communications industry, conventionally be all use+24V or-48V power supply, general power consumption equipment is conventionally all directly from batteries power taking, because battery pack emptying voltage is the every joint of 1.0V, for preventing that battery over-discharge or overvoltage from puncturing power consumption equipment, therefore+24V gets conventionally: 18V ~ 30V;-48V gets-36 ~-60V conventionally, in battery reversal connection, and overvoltage or owe, in electric situation, device damage to occur.
Therefore be necessary to provide a kind of new electricity-fetching protection device to address the above problem.
Summary of the invention
The present invention relates to a kind of electricity-fetching protection device.
To achieve the above object of the invention, the invention provides a kind of electricity-fetching protection device, it comprises: power supply, reverse-connection preventing circuit, dividing potential drop follow circuit, amplifier power supply circuits, crossing current source circuit, image current source circuit, window comparator, negater circuit, final stage switching circuit, wherein, reverse-connection preventing circuit, dividing potential drop follow circuit, crossing current source circuit, image current source circuit, negater circuit and final stage switching circuit are all parallel to power positive cathode two ends, described amplifier power supply circuits are connected between positive source and dividing potential drop follow circuit, and by a voltage-stabiliser tube ground connection; Described window comparator input is connected with mirror image circuit, and output is connected with negater circuit.
As a further improvement on the present invention, described reverse-connection preventing circuit comprises the first resistance, the second resistance, the first electric capacity, the first voltage stabilizing didoe, the first N-channel MOS FET pipe, described the second resistance, after the first electric capacity and the first voltage stabilizing didoe are all in parallel with the source gate of a N-channel MOS FET pipe, connect with described the second resistance.
As a further improvement on the present invention, described dividing potential drop follow circuit comprises the 3rd resistance, the 4th resistance, the 5th resistance and the first comparator, described the 3rd resistance the 4th resistance and the series connection of the 5th resistance, described the first comparator one input is between the 4th resistance and the 5th resistance, and another input is connected with output.
As a further improvement on the present invention, described amplifier power supply circuits, comprise the 6th resistance and the second voltage stabilizing didoe, and described the 6th resistance is parallel between positive source and described the first comparator, and described the 6th resistance is by the second voltage stabilizing didoe ground connection.
As a further improvement on the present invention, described crossing current source circuit, comprises the 7th resistance, the 8th resistance, the 9th resistance, three-terminal voltage-stabilizing pipe, the second metal-oxide-semiconductor, described the second metal-oxide-semiconductor grid is connected with positive source by the 7th resistance, source electrode is connected with power cathode by the 8th resistance, grid is connected with three-terminal voltage-stabilizing pipe input pin, and three-terminal voltage-stabilizing pipe output pin is connected with the 8th resistance, and the 9th resistance and one first switch in parallel are in the 8th resistance two ends.
As a further improvement on the present invention, described image current source circuit, comprises the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor, the tenth resistance, the 11 resistance, described the second metal-oxide-semiconductor drain electrode and the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, and the grid of the 5th metal-oxide-semiconductor is connected, described the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, and the source electrode of the 5th metal-oxide-semiconductor is connected with positive source, the grid drain electrode of the 3rd metal-oxide-semiconductor is connected, the 4th metal-oxide-semiconductor, and the 5th metal-oxide-semiconductor.
As a further improvement on the present invention, described window comparator, comprise the 12 resistance, the 13 resistance, the 14 resistance, the 3rd comparator, the 4th comparator, the 3rd diode, the 4th diode, after described the 4th comparator anode is connected with the 3rd comparator negative terminal, be connected with the output of described the first comparator by the 13 resistance, the 4th comparator negative terminal is connected with the drain electrode of the 4th metal-oxide-semiconductor by the 12 resistance, output is connected with the 3rd diode cathode, the 3rd comparator anode is connected with the drain electrode of the 5th metal-oxide-semiconductor by the 14 resistance, output is connected with the 4th diode cathode.
As a further improvement on the present invention, described negater circuit comprises the 15 resistance, the 16 resistance, the 17 resistance and the 6th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor drain electrode connects positive source by the 17 resistance, and source electrode connects power cathode, grid is connected with the 15 resistance and the 16 resistance, wherein, the 15 resistance other end is connected with the 3rd diode cathode and the 4th diode cathode, and the 16 resistance other end is connected with power cathode.
As a further improvement on the present invention, described final stage switching circuit, comprise the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 7th P channel mosfet pipe, the 8th metal-oxide-semiconductor, wherein the 8th metal-oxide-semiconductor drain electrode is connected by the 21 resistance one end, grid is connected with the 20 resistance with the 18 resistance, source electrode is connected with power cathode, another section of the 18 resistance is connected with the 6th metal-oxide-semiconductor, the 20 resistance other end is connected with power cathode, the 7th P channel mosfet pipe source electrode is connected with positive source, grid is connected with the 21 resistance other end, drain electrode is connected with circuit output end, the 19 resistance is parallel to the 7th P channel mosfet pipe source electrode and grid two ends.
As a further improvement on the present invention, the equal ground connection of described power cathode and negative pole of output end.
Compared with prior art, electricity-fetching protection device provided by the present invention, under reverse power connection, overvoltage or under-voltage condition, refuses power taking, the safe operation of protection equipment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing relevant of the present invention in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the electricity-fetching protection device frame diagram of one embodiment of the invention;
Fig. 2 is the electricity-fetching protection device circuit diagram of one embodiment of the invention.
Embodiment
Describe the present invention below with reference to each embodiment shown in the drawings.But these embodiment do not limit the present invention, the conversion in structure, method or function that those of ordinary skill in the art makes according to these embodiment is all included in protection scope of the present invention.
Shown in ginseng Fig. 1 and Fig. 2, electricity-fetching protection device provided by the present invention comprises: power supply, reverse-connection preventing circuit, dividing potential drop follow circuit, amplifier power supply circuits, crossing current source circuit, image current source circuit, window comparator, negater circuit, final stage switching circuit, wherein, reverse-connection preventing circuit, dividing potential drop follow circuit, crossing current source circuit, image current source circuit, negater circuit and final stage switching circuit are all parallel to power positive cathode two ends, and described amplifier power supply circuits are connected between positive source and dividing potential drop follow circuit, and by a voltage-stabiliser tube ground connection; Described window comparator input is connected with mirror image circuit, and output is connected with negater circuit.
Described reverse-connection preventing circuit comprises the first resistance R 1, the second resistance R 2, the first capacitor C 1, the first voltage stabilizing didoe D1, the first N-channel MOS FET pipe Q1, after described the second resistance R 2, the first capacitor C 1 and the first voltage stabilizing didoe D1 are all in parallel with the source gate of a N-channel MOS FET pipe Q1, connect with described the second resistance R 2.
Described dividing potential drop follow circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5 and the first comparator U1A, described the 3rd resistance R 3 the 4th resistance R 4 and the 5th resistance R 5 are connected, described the first comparator U1A mono-input is between the 4th resistance R 4 and the 5th resistance R 5, and another input is connected with output.
Described amplifier power supply circuits, comprise the 6th resistance R 6 and the second voltage stabilizing didoe D2, and described the 6th resistance R 6 is parallel between positive source and described the first comparator U1A, and described the 6th resistance R 6 is by the second voltage stabilizing didoe D2 ground connection.
Described crossing current source circuit, comprise the 7th resistance R 7, the 8th resistance R 8, the nine resistance R 9, three-terminal voltage-stabilizing pipe U2, the second metal-oxide-semiconductor Q2, described the second metal-oxide-semiconductor Q2 grid is connected with positive source by the 7th resistance R 7, and source electrode is connected with power cathode by the 8th resistance R 8, and grid is connected with three-terminal voltage-stabilizing pipe U2 input pin, the defeated U2 of three-terminal voltage-stabilizing pipe goes out pin and is connected with the 8th resistance R 8, and the 9th resistance R 9 and one first switch SW 1 are parallel to the 8th resistance R 8 two ends.
Described image current source circuit, comprise the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, the 5th metal-oxide-semiconductor Q5, the tenth resistance R 10, the 11 resistance R 11, described the second metal-oxide-semiconductor Q2 drain electrode and the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the grid of the 5th metal-oxide-semiconductor Q5 is connected, described the 3rd metal-oxide-semiconductor Q3, the 4th metal-oxide-semiconductor Q4, and the source electrode of the 5th metal-oxide-semiconductor Q5 is connected with positive source, the grid drain electrode of the 3rd metal-oxide-semiconductor Q3 is connected, the 4th metal-oxide-semiconductor Q4, and the 5th metal-oxide-semiconductor Q5.
Described window comparator, comprise the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 3rd comparator U1B, the 4th comparator U1C, the 3rd diode D3, the 4th diode D4, after described the 4th comparator U1C anode is connected with the 3rd comparator negative terminal, be connected with the output of described the first comparator U1A by the 13 resistance, the 4th comparator U1C negative terminal is connected with the drain electrode of the 4th metal-oxide-semiconductor Q4 by the 12 resistance R 12, output is connected with the 3rd diode D3 is anodal, the 3rd comparator U1B anode is connected with the drain electrode of the 5th metal-oxide-semiconductor Q5 by the 14 resistance R 14, output is connected with the 4th diode D4 is anodal.
Described negater circuit comprises the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17 and the 6th metal-oxide-semiconductor Q6, the 6th metal-oxide-semiconductor Q6 drain electrode connects positive source by the 17 resistance R 17, source electrode connects power cathode, grid is connected with the 15 resistance R the 15 and the 16 resistance R 16, wherein, the 15 resistance R 15 other ends are connected with the 3rd diode D3 negative pole and the 4th diode D4 negative pole, and the 16 resistance R 16 other ends are connected with power cathode.
Described final stage switching circuit, comprise the 18 resistance R 18, the 19 resistance R 19, the 20 resistance R 20, the 21 resistance R 21, the 7th P channel mosfet pipe Q7, the 8th metal-oxide-semiconductor Q8, wherein the 8th metal-oxide-semiconductor Q8 drain electrode is connected by the 21 resistance R 21 one end, grid is connected with the 20 resistance R 20 with the 18 resistance R 18, source electrode is connected with power cathode, the 18 resistance R 18 other ends are connected with the 6th metal-oxide-semiconductor Q6, the 20 resistance R 20 other ends are connected with power cathode, the 7th P channel mosfet pipe Q7 source electrode is connected with positive source, grid is connected with the 21 resistance R 21 other ends, drain electrode is connected with circuit output end, the 19 resistance R 19 is parallel to the 7th P channel mosfet pipe source electrode and grid two ends.
In the present embodiment, the equal ground connection of described power cathode and negative pole of output end.
Take input+24V voltage as example, the first switch SW 1 disconnects, and the first comparator output VSI is+24V/36=0.667V that VH is actual is 2.5V/150*50=0.833V; VL is 1.5V; 30V theory of correspondences value should be 30/36, VL theory of correspondences value and should be 18/36; In the time that input voltage exceedes 30V, VSI>VH, the 3rd diode D3 conducting, the 4th diode D4 conducting in the time that input voltage is less than 18V; The 3rd diode D3 or the arbitrary conducting of the 4th diode D4 the 7th P channel mosfet pipe Q7 are closed, and have realized low-voltage variation to batteries and the overvoltage protection of late-class circuit.
Electricity-fetching protection device provided by the present invention, under reverse power connection, overvoltage or under-voltage condition, refuses power taking, the safe operation of protection equipment.
Be to be understood that, although this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, technical scheme in each execution mode also can, through appropriately combined, form other execution modes that it will be appreciated by those skilled in the art that.
Listed a series of detailed description is above only illustrating for feasibility execution mode of the present invention; they are not in order to limit the scope of the invention, all do not depart from the equivalent execution mode that skill spirit of the present invention does or change and all should be included in protection scope of the present invention within.

Claims (10)

1. an electricity-fetching protection device, it is characterized in that, comprise: power supply, reverse-connection preventing circuit, dividing potential drop follow circuit, amplifier power supply circuits, crossing current source circuit, image current source circuit, window comparator, negater circuit, final stage switching circuit, wherein, reverse-connection preventing circuit, dividing potential drop follow circuit, crossing current source circuit, image current source circuit, negater circuit and final stage switching circuit are all parallel to power positive cathode two ends, described amplifier power supply circuits are connected between positive source and dividing potential drop follow circuit, and by a voltage-stabiliser tube ground connection; Described window comparator input is connected with mirror image circuit, and output is connected with negater circuit.
2. electricity-fetching protection device as claimed in claim 1; it is characterized in that; described reverse-connection preventing circuit comprises the first resistance; the second resistance, the first electric capacity, the first voltage stabilizing didoe; the first N-channel MOS FET pipe; described the second resistance, after the first electric capacity and the first voltage stabilizing didoe are all in parallel with the source gate of a N-channel MOS FET pipe, connects with described the second resistance.
3. electricity-fetching protection device as claimed in claim 2; it is characterized in that; described dividing potential drop follow circuit comprises the 3rd resistance; the 4th resistance; the 5th resistance and the first comparator; described the 3rd resistance the 4th resistance and the series connection of the 5th resistance, described the first comparator one input is between the 4th resistance and the 5th resistance, and another input is connected with output.
4. electricity-fetching protection device as claimed in claim 3; it is characterized in that described amplifier power supply circuits comprise the 6th resistance and the second voltage stabilizing didoe; described the 6th resistance is parallel between positive source and described the first comparator, and described the 6th resistance is by the second voltage stabilizing didoe ground connection.
5. electricity-fetching protection device as claimed in claim 4, is characterized in that, described crossing current source circuit; comprise the 7th resistance; the 8th resistance, the 9th resistance, three-terminal voltage-stabilizing pipe; the second metal-oxide-semiconductor; described the second metal-oxide-semiconductor grid is connected with positive source by the 7th resistance, and source electrode is connected with power cathode by the 8th resistance, and grid is connected with three-terminal voltage-stabilizing pipe input pin; three-terminal voltage-stabilizing pipe output pin is connected with the 8th resistance, and the 9th resistance and one first switch in parallel are in the 8th resistance two ends.
6. electricity-fetching protection device as claimed in claim 5, is characterized in that, described image current source circuit; comprise the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, the 5th metal-oxide-semiconductor; the tenth resistance, the 11 resistance, described the second metal-oxide-semiconductor drain electrode and the 3rd metal-oxide-semiconductor; the 4th metal-oxide-semiconductor, and the grid of the 5th metal-oxide-semiconductor is connected, described the 3rd metal-oxide-semiconductor; the 4th metal-oxide-semiconductor, and the source electrode of the 5th metal-oxide-semiconductor is connected with positive source, the grid drain electrode of the 3rd metal-oxide-semiconductor is connected; the 4th metal-oxide-semiconductor, and the 5th metal-oxide-semiconductor.
7. electricity-fetching protection device as claimed in claim 6, it is characterized in that, described window comparator, comprise the 12 resistance, the 13 resistance, the 14 resistance, the 3rd comparator, the 4th comparator, the 3rd diode, the 4th diode, after described the 4th comparator anode is connected with the 3rd comparator negative terminal, be connected with the output of described the first comparator by the 13 resistance, the 4th comparator negative terminal is connected with the drain electrode of the 4th metal-oxide-semiconductor by the 12 resistance, output is connected with the 3rd diode cathode, the 3rd comparator anode is connected with the drain electrode of the 5th metal-oxide-semiconductor by the 14 resistance, output is connected with the 4th diode cathode.
8. electricity-fetching protection device as claimed in claim 7; it is characterized in that; described negater circuit comprises the 15 resistance, the 16 resistance, the 17 resistance and the 6th metal-oxide-semiconductor; the 6th metal-oxide-semiconductor drain electrode connects positive source by the 17 resistance; source electrode connects power cathode, and grid is connected with the 15 resistance and the 16 resistance, wherein; the 15 resistance other end is connected with the 3rd diode cathode and the 4th diode cathode, and the 16 resistance other end is connected with power cathode.
9. electricity-fetching protection device as claimed in claim 8, it is characterized in that, described final stage switching circuit, comprise the 18 resistance, the 19 resistance, the 20 resistance, the 21 resistance, the 7th P channel mosfet pipe, the 8th metal-oxide-semiconductor, wherein the 8th metal-oxide-semiconductor drain electrode is connected by the 21 resistance one end, grid is connected with the 20 resistance with the 18 resistance, source electrode is connected with power cathode, another section of the 18 resistance is connected with the 6th metal-oxide-semiconductor, the 20 resistance other end is connected with power cathode, the 7th P channel mosfet pipe source electrode is connected with positive source, grid is connected with the 21 resistance other end, drain electrode is connected with circuit output end, the 19 resistance is parallel to the 7th P channel mosfet pipe source electrode and grid two ends.
10. electricity-fetching protection device as claimed in claim 9, is characterized in that, the equal ground connection of described power cathode and negative pole of output end.
CN201210449645.4A 2012-11-12 2012-11-12 Electricity-taking protection device Pending CN103812088A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210449645.4A CN103812088A (en) 2012-11-12 2012-11-12 Electricity-taking protection device

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Application Number Priority Date Filing Date Title
CN201210449645.4A CN103812088A (en) 2012-11-12 2012-11-12 Electricity-taking protection device

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CN103812088A true CN103812088A (en) 2014-05-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887900A (en) * 2017-05-17 2018-04-06 珠海经济特区金品电器有限公司 Meet storage battery power supply voltage instability and protect the protection device of LCD screen

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US5963062A (en) * 1996-10-18 1999-10-05 Nec Corporation Window comparator
CN1504853A (en) * 2002-11-29 2004-06-16 ���µ�����ҵ��ʽ���� Parameter correction circuit and parameter correction method
CN201382353Y (en) * 2009-04-01 2010-01-13 三门峡仪电有限责任公司 Capacitance LED emergency lighting lamp unit
CN201490685U (en) * 2009-07-24 2010-05-26 深圳市中兴移动通信有限公司 Multifunction power protection circuit
CN101782407A (en) * 2010-02-11 2010-07-21 合肥工业大学 Digital vortex street/precession flowmeter powered by battery
CN101841149A (en) * 2010-05-11 2010-09-22 海洋王照明科技股份有限公司 Power source protection circuit and LED lamp
CN201994659U (en) * 2011-04-22 2011-09-28 北京科诺伟业科技有限公司 Reverse-connection-prevention protective circuit for solar photovoltaic charging controller
CN102545163A (en) * 2010-12-24 2012-07-04 海洋王照明科技股份有限公司 Battery discharge protection circuit and LED (Light Emitting Diode) lamp

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5963062A (en) * 1996-10-18 1999-10-05 Nec Corporation Window comparator
CN1504853A (en) * 2002-11-29 2004-06-16 ���µ�����ҵ��ʽ���� Parameter correction circuit and parameter correction method
CN201382353Y (en) * 2009-04-01 2010-01-13 三门峡仪电有限责任公司 Capacitance LED emergency lighting lamp unit
CN201490685U (en) * 2009-07-24 2010-05-26 深圳市中兴移动通信有限公司 Multifunction power protection circuit
CN101782407A (en) * 2010-02-11 2010-07-21 合肥工业大学 Digital vortex street/precession flowmeter powered by battery
CN101841149A (en) * 2010-05-11 2010-09-22 海洋王照明科技股份有限公司 Power source protection circuit and LED lamp
CN102545163A (en) * 2010-12-24 2012-07-04 海洋王照明科技股份有限公司 Battery discharge protection circuit and LED (Light Emitting Diode) lamp
CN201994659U (en) * 2011-04-22 2011-09-28 北京科诺伟业科技有限公司 Reverse-connection-prevention protective circuit for solar photovoltaic charging controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887900A (en) * 2017-05-17 2018-04-06 珠海经济特区金品电器有限公司 Meet storage battery power supply voltage instability and protect the protection device of LCD screen

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Application publication date: 20140521