CN207764338U - A kind of fuse detection circuit - Google Patents

A kind of fuse detection circuit Download PDF

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Publication number
CN207764338U
CN207764338U CN201820106688.5U CN201820106688U CN207764338U CN 207764338 U CN207764338 U CN 207764338U CN 201820106688 U CN201820106688 U CN 201820106688U CN 207764338 U CN207764338 U CN 207764338U
Authority
CN
China
Prior art keywords
photoelectrical coupler
optocoupler
fuse
triode
diode
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.)
Expired - Fee Related
Application number
CN201820106688.5U
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Chinese (zh)
Inventor
郑肇显
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.)
Shenzhen Medium Wave Amperex Technology Ltd
Original Assignee
Shenzhen Medium Wave Amperex Technology 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 Shenzhen Medium Wave Amperex Technology Ltd filed Critical Shenzhen Medium Wave Amperex Technology Ltd
Priority to CN201820106688.5U priority Critical patent/CN207764338U/en
Application granted granted Critical
Publication of CN207764338U publication Critical patent/CN207764338U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of fuse detection circuits, including photoelectrical coupler U1 and photoelectrical coupler U2, the optocoupler diode input terminal of photoelectrical coupler U1 connects fuse with the optocoupler diode output of photoelectrical coupler U2, the optocoupler diode output of photoelectrical coupler U1 connects current-limiting resistance R1 with the optocoupler diode input terminal of photoelectrical coupler U2, current-limiting resistance R1 is in series with coupled capacitor C1 and forms series circuit, and series circuit is in parallel with fuse;The optocoupler triode input terminal of photoelectrical coupler U1 and photoelectrical coupler U2 is connected with transfer resistance R2, the optocoupler transistor output of photoelectrical coupler U1 and photoelectrical coupler U2 is grounded, the optocoupler triode of photoelectrical coupler U1 and photoelectrical coupler U2, in addition the common end of transfer resistance R2 is as detection output.The utility model can easily detect that fuse has been fused or worked normally in real time by exporting low and high level, occupy less cpu resource and element, and practical reliable.

Description

A kind of fuse detection circuit
Technical field
The utility model is related to electronic circuit technology fields, more particularly to a kind of fuse detection circuit.
Background technology
At present in ups power and photovoltaic DC-to-AC converter, to limit size of current, ensure equipment safety, can be exported in inversion Increase fuse in the ac circuit of side, work as overcurrent, blown fuse, equipment is caused to will be unable to normally export.Due to UPS electricity The importance in source and photovoltaic DC-to-AC converter equipment needs timely processing to replace, at this moment with regard to needs pair when insuring terminal fault and occurring The circuit that fuse is monitored in real time.Traditional method is the voltage or loop current by detecting fuse rear and front end Judge, such mode needs to occupy more cpu resource and element.
Utility model content
The purpose of this utility model is to provide a kind of practicalities reliably, occupy cpu resource and element is less is used in real time Monitor the fuse detection circuit of fuse state.
A kind of fuse detection circuit disclosed by the utility model the technical solution adopted is that:A kind of fuse detection electricity Road, including photoelectrical coupler U1 and photoelectrical coupler U2, the input terminal of the optocoupler diode of the photoelectrical coupler U1 and described One end of the output end connection fuse of the optocoupler diode of photoelectrical coupler U2, the optocoupler diode of the photoelectrical coupler U1 Output end one end of current-limiting resistance R1, the current limliting electricity are connected with the input terminal of the optocoupler diode of the photoelectrical coupler U2 The other end of resistance R1 is in series with coupled capacitor C1 and forms series circuit, and the series circuit is in parallel with the fuse.
The input terminal of the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 connects Be connected to transfer resistance R2, the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 it is defeated Outlet is grounded, the optocoupler triode of the photoelectrical coupler U1, the optocoupler triode of the photoelectrical coupler U2 and the conversion The common end of resistance R2 is as detection output.
Preferably, the output end in the input terminal connection AC signal circuit of the fuse detection circuit.
Preferably, the other end access power supply VCC of the transfer resistance R2.
Preferably, the light of the anode of the optocoupler diode of the photoelectrical coupler U1 and the photoelectrical coupler U2 One end of the cathode connection fuse of coupling diode, the cathode of the optocoupler diode of the photoelectrical coupler U1 and the photoelectricity coupling One end of the anode connection current-limiting resistance R1 of the optocoupler diode of clutch U2.
Preferably, three pole of optocoupler of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 The collector of pipe is connected with transfer resistance R2, the light of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 The emitter of coupling triode is grounded.
Fuse detection circuit provided by the utility model, when the unblown circuit normal work of fuse, photoelectric coupling The optocoupler diode of device U1 and the optocoupler diode of photoelectrical coupler U2 do not have electric current to pass through, photoelectrical coupler U1 and photoelectric coupling The optocoupler triode of device U2 is not turned on, and the interrupt signal of optocoupler triode side is converted to the height of detection output by transfer resistance R2 Level signal, detection output export high level signal;When blown fuse, coupled capacitor C1, current-limiting resistance R1 and photoelectricity The optocoupler diode of coupler U1 and photoelectrical coupler U2 respectively constitutes circuit loop, at this time photoelectrical coupler U1 and photoelectric coupling The optocoupler diode of device U2 has electric current to pass through, the optocoupler triode ON of photoelectrical coupler U1 and photoelectrical coupler U2, conversion electricity The Continuity signal of optocoupler triode side is converted to the low level signal of detection output by resistance R2, and detection output exports low level Signal.The switching signal of optocoupler triode side is converted to low and high level signal by the utility model in real time by transfer resistance, is made CPU easily real-time judge can go out fuse and fuse or work normally, to facilitate people to carry out troubleshooting With replacement fuse, the cpu resource and element not only taken up are few, and practical reliable.
Description of the drawings
Fig. 1 is the structural schematic diagram of the fuse detection circuit of the utility model.
Specific implementation mode
The utility model is further elaborated and is illustrated with reference to specific embodiment and Figure of description:Please refer to figure 1, a kind of fuse detection circuit, including photoelectrical coupler U1 and photoelectrical coupler U2, the optocoupler two of the photoelectrical coupler U1 The input terminal of pole pipe connects one end of fuse, the photoelectricity coupling with the output end of the optocoupler diode of the photoelectrical coupler U2 The output end of the optocoupler diode of clutch U1 connects current-limiting resistance with the input terminal of the optocoupler diode of the photoelectrical coupler U2 One end of R1, the other end of the current-limiting resistance R1 are in series with coupled capacitor C1 and form series circuit, the series circuit and institute State fuse parallel connection, the output end in the input terminal connection AC signal circuit of the fuse detection circuit.
The input terminal of the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 connects Be connected to transfer resistance R2, the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 it is defeated Outlet is grounded, the optocoupler triode of the photoelectrical coupler U1, the optocoupler triode of the photoelectrical coupler U2 and the conversion The common end of resistance R2 is as detection output.The other end access power supply VCC of the transfer resistance R2.
It should be noted that the light of the anode of the optocoupler diode of the photoelectrical coupler U1 and the photoelectrical coupler U2 One end of the cathode connection fuse of coupling diode, the cathode of the optocoupler diode of the photoelectrical coupler U1 and the photoelectricity coupling One end of the anode connection current-limiting resistance R1 of the optocoupler diode of clutch U2.
The collector of the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 connects It is connected to transfer resistance R2, the hair of the optocoupler triode of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 Emitter grounding.
Fuse detection circuit provided by the utility model, when the unblown circuit normal work of fuse, photoelectric coupling The optocoupler diode of device U1 and the optocoupler diode of photoelectrical coupler U2 do not have electric current to pass through, photoelectrical coupler U1 and photoelectric coupling The optocoupler triode of device U2 is not turned on, and the interrupt signal of optocoupler triode side is converted to the height of detection output by transfer resistance R2 Level signal, detection output export high level signal;When blown fuse, coupled capacitor C1, current-limiting resistance R1 and photoelectricity The optocoupler diode of coupler U1 and photoelectrical coupler U2 respectively constitutes circuit loop, at this time photoelectrical coupler U1 and photoelectric coupling The optocoupler diode of device U2 has electric current to pass through, the optocoupler triode ON of photoelectrical coupler U1 and photoelectrical coupler U2, conversion electricity The Continuity signal of optocoupler triode side is converted to the low level signal of detection output by resistance R2, and detection output exports low level Signal.The switching signal of optocoupler triode side is converted to low and high level signal by the utility model in real time by transfer resistance, is made CPU easily real-time judge can go out fuse and fuse or work normally, to facilitate people to carry out troubleshooting With replacement fuse, the cpu resource and element not only taken up are few, and practical reliable.
Finally it should be noted that above example is only to illustrate the technical solution of the utility model, rather than to this reality With the limitation of novel protected range, although being explained in detail to the utility model with reference to preferred embodiment, this field it is general Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the utility model, without departing from this The spirit and scope of utility model technical solution.

Claims (5)

1. a kind of fuse detection circuit, it is characterised in that:Including photoelectrical coupler U1 and photoelectrical coupler U2, the photoelectricity coupling The input terminal of the optocoupler diode of clutch U1 connects fuse with the output end of the optocoupler diode of the photoelectrical coupler U2 The input of the optocoupler diode of one end, the output end of the optocoupler diode of the photoelectrical coupler U1 and the photoelectrical coupler U2 One end of end connection current-limiting resistance R1, the other end of the current-limiting resistance R1 are in series with coupled capacitor C1 and form series circuit, institute It is in parallel with the fuse to state series circuit;The light of the optocoupler triode of the photoelectrical coupler U1 and the photoelectrical coupler U2 The input terminal of coupling triode is connected with the optocoupler triode and the photoelectrical coupler of transfer resistance R2, the photoelectrical coupler U1 The output end of the optocoupler triode of U2 is grounded, the optocoupler triode of the photoelectrical coupler U1, the photoelectrical coupler U2 light The common end of coupling triode and the transfer resistance R2 are as detection output.
2. fuse detection circuit as described in claim 1, it is characterised in that:The input terminal of the fuse detection circuit connects Connect the output end in AC signal circuit.
3. fuse detection circuit as described in claim 1, it is characterised in that:The other end access electricity of the transfer resistance R2 Source VCC.
4. fuse detection circuit as described in claim 1, it is characterised in that:The optocoupler diode of the photoelectrical coupler U1 Anode one end of fuse is connected with the cathode of the optocoupler diode of the photoelectrical coupler U2, the photoelectrical coupler U1's The cathode of optocoupler diode connects one end of current-limiting resistance R1 with the anode of the optocoupler diode of the photoelectrical coupler U2.
5. fuse detection circuit as described in claim 1, it is characterised in that:The optocoupler triode of the photoelectrical coupler U1 It is connected with transfer resistance R2, the optocoupler of the photoelectrical coupler U1 with the collector of the optocoupler triode of the photoelectrical coupler U2 The emitter of the optocoupler triode of triode and the photoelectrical coupler U2 is grounded.
CN201820106688.5U 2018-01-23 2018-01-23 A kind of fuse detection circuit Expired - Fee Related CN207764338U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820106688.5U CN207764338U (en) 2018-01-23 2018-01-23 A kind of fuse detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820106688.5U CN207764338U (en) 2018-01-23 2018-01-23 A kind of fuse detection circuit

Publications (1)

Publication Number Publication Date
CN207764338U true CN207764338U (en) 2018-08-24

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Family Applications (1)

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CN201820106688.5U Expired - Fee Related CN207764338U (en) 2018-01-23 2018-01-23 A kind of fuse detection circuit

Country Status (1)

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CN (1) CN207764338U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111487566A (en) * 2019-01-29 2020-08-04 陕西重型汽车有限公司 Novel fuse wire detection circuit and detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111487566A (en) * 2019-01-29 2020-08-04 陕西重型汽车有限公司 Novel fuse wire detection circuit and detection method

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CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180824

Termination date: 20200123