CN206650419U - Electrical fuse circuit for load control - Google Patents
Electrical fuse circuit for load control Download PDFInfo
- Publication number
- CN206650419U CN206650419U CN201720449369.XU CN201720449369U CN206650419U CN 206650419 U CN206650419 U CN 206650419U CN 201720449369 U CN201720449369 U CN 201720449369U CN 206650419 U CN206650419 U CN 206650419U
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- China
- Prior art keywords
- resistance
- power supply
- pin
- diode
- auxiliary reclay
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
For the electrical fuse circuit of load control, belong to optical field, the utility model is to solve the problems, such as that traditional insurance silk service behaviour is unreliable, be unable to Self-resetting.The utility model includes DC power supplier, current transformer TA, auxiliary reclay K1~K2, resistance R1~R5, slide rheostat RP, electric capacity C1~C2, diode D1~D2, voltage-regulator diode VS1~VS2, triode VT1~VT2 and bidirectional thyristor VTH；When load is transfinited, current transformer secondary induces high current, and trigger control circuit switches to the AC power of load supplying, while audible alarm, and after load restoration is normal, then it is load supplying that Self-resetting, which makes AC power,.
Description
Technical field
The utility model belongs to supply load control field.
Background technology
When circuit malfunctions or it is abnormal when, constantly raised along with electric current, and elevated electric current be possible to damage electricity
Some important devices or valuable device in road, it is also possible to burn circuit or even cause fire.If correctly disposed in circuit
Fuse, then, fuse will be current anomaly be increased to certain height and temperature when, itself fusing cut-out electricity
Stream, so as to play a part of protection circuit safe operation.
But blown fuse process is the process of a thermal accumlation, when circuital current reach fuse blowout current or
Person crosses blowout current, if the time is short enough, does not reach the temperature of blown fuse, fuse will not fuse, its work
It is unreliable to make performance.
Also, traditional insurance silk has the shortcomings that being unable to Self-resetting, once itself fuses, after circuit recovers normal also not
It can automatically reset, it is necessary to the fuse more renewed by staff.
The content of the invention
The purpose of the utility model is to solve the problems, such as that traditional insurance silk service behaviour is unreliable, be unable to Self-resetting, carry
A kind of electrical fuse circuit for load control is supplied.
Electrical fuse circuit described in the utility model for load control, including DC power supplier, electric current
Transformer TA, auxiliary reclay K1, auxiliary reclay K2, resistance R1~R5, slide rheostat RP, electric capacity C1, electric capacity C2, two poles
Pipe D1, diode D2, voltage-regulator diode VS1, voltage-regulator diode VS2, NPN triode VT1, NPN triode VT2 and two-way brilliant lock
Pipe VTH；
220V AC powers are load supplying, bidirectional thyristor VTH are concatenated on its live wire L, bidirectional thyristor VTH's
Series capacitance C2 and resistance R5 between both ends, between bidirectional thyristor VTH one end and control pole series resistance R4 and it is middle after
Electrical equipment K1 normally-closed contacts K1-1；
Live wire between bidirectional thyristor VTH and 220V AC power seals in current transformer TA primary coil, electric current
One end connection diode D1 of transformer TA secondary coils anode, diode D1 negative electrode connection resistance R1 one end, resistance
The R1 other end connects electric capacity C1 one end and a slide rheostat RP fixing end, slide rheostat RP movable end simultaneously
Connect voltage-regulator diode VS1 negative electrode；Voltage-regulator diode VS1 anode connection NPN triode VT1 base stage, NPN triode
VT1 colelctor electrode connects resistance R2 one end and one end of auxiliary reclay K1 coils, resistance R2 other end connection NPN simultaneously
Triode VT2 base stage, NPN triode VT2 colelctor electrode connect one end and the diode D2 of auxiliary reclay K2 coils simultaneously
Anode, NPN triode VT2 emitter stage connects resistance R3 one end and voltage-regulator diode VS2 negative electrode simultaneously；Middle relay
The other end of device K1 coils, the other end of auxiliary reclay K2 coils, diode D2 negative electrode and resistance R3 the other end simultaneously
Connect the cathode power supply output end of DC power supplier；
The other ends of current transformer TA secondary coils connect simultaneously the electric capacity C1 other end, slide rheostat RP it is another
The negative power supply output of individual fixing end, NPN triode VT1 emitter stage, voltage-regulator diode VS2 anode and DC power supplier
End, and be grounded.
Preferably, in addition to audible alarm module, audible alarm module include NE555 time-base integrated circuits, resistance R6, electricity
Hinder R7, electrochemical capacitor C5, electric capacity C6 and loudspeaker BL；
2 pin of NE555 time-base integrated circuits connect simultaneously resistance R6 one end and auxiliary reclay K2 normally-closed contacts one
End；
6 pin of NE555 time-base integrated circuits connect resistance R6 one end and electrochemical capacitor C5 positive pole simultaneously；
The 5 pin connection electric capacity C6 of NE555 time-base integrated circuits one end；
The 3 pin connection loudspeaker BL of NE555 time-base integrated circuits positive pole power supply terminal；
4 pin, 8 pin of NE555 time-base integrated circuits connect the resistance R6 other end, the resistance R7 other end and centre simultaneously
Relay K1 normally opened contacts K1-2 one end, auxiliary reclay K1 normally opened contacts K1-2 other end connection DC power supplier
Cathode power supply output end；
1 pin of NE555 time-base integrated circuits connects loudspeaker BL negative pole power supply terminal, the electric capacity C6 other end, electricity simultaneously
Solve electric capacity C5 negative pole, the other end of auxiliary reclay K2 normally-closed contacts and the negative power supply output end of DC power supplier.
Preferably, DC power supplier includes transformer T, rectifier bridge UR, 7805 voltage stabilizing chips, electrochemical capacitor C3 and electrolysis
Electric capacity C4；
The both ends of transformer T primary coil connect the live wire L and zero line N of 220V AC powers respectively；Transformer T secondary
Coil both ends connection rectifier bridge UR two ac input ends, rectifier bridge UR cathode power supply output end connect electrochemical capacitor simultaneously
1 pin of C3 positive pole and 7805 voltage stabilizing chips, the 3 pin connection electrochemical capacitor C4 of 7805 voltage stabilizing chips positive pole, and it is used as direct current
The cathode power supply output end of power module；
Rectifier bridge UR negative power supply output end connect simultaneously electrochemical capacitor C3 negative pole, 2 pin of 7805 voltage stabilizing chips and
Electrochemical capacitor C4 negative pole, and as the negative power supply output end of DC power supplier.
The advantages of the utility model：Electrical fuse circuit structure letter described in the utility model for load control
It is single, built using discrete electronic component, stable performance.
The on-line monitoring of this circuit load whether excess load, once load current transfinites, cut off the current supply circuit of load immediately,
After trouble shooting, the utility model can automatically switch to the working condition of powering load.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the electrical fuse circuit described in the utility model for load control.
Embodiment
Illustrate the work original of electrical fuse circuit for being used for load control described in present embodiment with reference to Fig. 1
Reason.
DC power supplier 1 converts alternating current to dc source, and power to whole device from AC power power taking.
220V alternating currents are depressured by transformer T, then are filtered through C3, again by 7805 decompressions, voltage stabilizing, C4 filtering output galvanic currents
Source.The dc source is also normally opened tactile in auxiliary reclay K1 to control circuit power supply where K1, K2 coil, the dc source
Powered under point K1-2 control to audible alarm module 2.
Bidirectional thyristor VTH go here and there on live wire L, its state be on or off depending on VTH gate pole whether have it is tactile
Generate electricity pressure, and when K1-1 is closed, VTH conductings, 220V AC powers are load supplying；When K1-1 disconnects, VTH cut-offs, 220V
It is load supplying that AC power, which stops,.
Current transformer TA primary coil string is sampled on live wire L to load current, and its secondary coil induces
The sampling current, when load normal non-fault, the electric current that TA secondary senses is in normal range (NR), and slide rheostat RP is separated
Undertension is to puncture VS1, then VT1 base stages are without bias voltage, VT1 cut-offs；Because VT1 ends, VT1 current collection extremely high level,
K1 coils both ends are all high level, and no pressure difference, K1 coils must not be electric, and K1-1 is remained closed, VTH conductings, and 220V AC powers are
Load provides power supply；Meanwhile because K1 coils must not be electric, K1-2 is remained open, and audible alarm module 2 can not obtain direct current
The power supply in source, therefore, audible alarm module 2 will not start work.
Because of VT1 current collections extremely high level, it is loaded with bias voltage to VT2 base stage, makes VT2 turn on, then K2 coils obtain
Electricity；It is off-state that it, which is connected to the normally-closed contact of NE555 2 pin,.
When load circuit breaks down, when electric current transfinites, current transformer TA secondary coil feels high current, and RP divides
The voltage gone out reaches breakdown VS1, and the base stage to VT1 adds bias voltage, then VT1 conductings, VT2 cut-offs；The state of VT1 conductings
Under, K1 coils obtain electric, its normally-closed contact K1-1 disconnections, and VTH gate pole stops without trigger voltage, VTH cut-offs, 220V AC powers
For load supplying；Meanwhile K1 normally opened contact K1-2 closures, DC power supplier 1 are that audible alarm module 2 provides work electricity
Source, audible alarm module 2 enter working condition.
Meanwhile because VT2 ends, K2 coils both ends are high level, no pressure difference, K2 coil losing electricities, therefore, the normally closed of K2 is touched
Point recovers closure state, then NE555 2 pin are pulled to rapidly low level, are overturn inside NE555, the NE555 high electricity of 3 pin output
Flat, loudspeaker BL carries out audible alarm.
After line fault is released from, the control circuit of present embodiment automatically resets, and VTH gate poles regain triggering electricity
Press and turn on.
Claims (3)
1. the electrical fuse circuit for load control, it is characterised in that mutual including DC power supplier (1), electric current
Sensor TA, auxiliary reclay K1, auxiliary reclay K2, resistance R1~R5, slide rheostat RP, electric capacity C1, electric capacity C2, diode
D1, diode D2, voltage-regulator diode VS1, voltage-regulator diode VS2, NPN triode VT1, NPN triode VT2 and bidirectional thyristor
VTH；
220V AC powers are load supplying, bidirectional thyristor VTH are concatenated on its live wire L, at bidirectional thyristor VTH both ends
Between series capacitance C2 and resistance R5, series resistance R4 and auxiliary reclay between bidirectional thyristor VTH one end and control pole
K1 normally-closed contacts K1-1；
Live wire between bidirectional thyristor VTH and 220V AC power seals in current transformer TA primary coil, Current Mutual Inductance
One end connection diode D1 of device TA secondary coils anode, diode D1 negative electrode connection resistance R1 one end, resistance R1's
The other end connects electric capacity C1 one end and a slide rheostat RP fixing end, slide rheostat RP movable end connection simultaneously
Voltage-regulator diode VS1 negative electrode；Voltage-regulator diode VS1 anode connection NPN triode VT1 base stage, NPN triode VT1's
Colelctor electrode connects resistance R2 one end and one end of auxiliary reclay K1 coils, resistance R2 other end connection NPN tri- poles simultaneously
Pipe VT2 base stage, NPN triode VT2 colelctor electrode connect one end of auxiliary reclay K2 coils and diode D2 sun simultaneously
Pole, NPN triode VT2 emitter stage connect resistance R3 one end and voltage-regulator diode VS2 negative electrode simultaneously；Auxiliary reclay K1
The other end of coil, the other end of auxiliary reclay K2 coils, diode D2 negative electrode and resistance the R3 other end connect simultaneously
The cathode power supply output end of DC power supplier (1)；
The other ends of current transformer TA secondary coils connect simultaneously the electric capacity C1 other end, slide rheostat RP another is solid
Fixed end, the negative power supply output of NPN triode VT1 emitter stage, voltage-regulator diode VS2 anode and DC power supplier (1)
End, and be grounded.
2. it is used for the electrical fuse circuit of load control according to claim 1, it is characterised in that also including sound
Alarm module (2), audible alarm module (2) include NE555 time-base integrated circuits, resistance R6, resistance R7, electrochemical capacitor C5, electricity
Hold C6 and loudspeaker BL；
2 pin of NE555 time-base integrated circuits connect resistance R6 one end and one end of auxiliary reclay K2 normally-closed contacts simultaneously；
6 pin of NE555 time-base integrated circuits connect resistance R6 one end and electrochemical capacitor C5 positive pole simultaneously；
The 5 pin connection electric capacity C6 of NE555 time-base integrated circuits one end；
The 3 pin connection loudspeaker BL of NE555 time-base integrated circuits positive pole power supply terminal；
4 pin, 8 pin of NE555 time-base integrated circuits connect the resistance R6 other end, the resistance R7 other end and middle relay simultaneously
Device K1 normally opened contacts K1-2 one end, auxiliary reclay K1 normally opened contacts K1-2 other end connection DC power supplier (1)
Cathode power supply output end；
1 pin of NE555 time-base integrated circuits connects loudspeaker BL negative pole power supply terminal, the electric capacity C6 other end, electrolysis electricity simultaneously
Hold C5 negative pole, the other end of auxiliary reclay K2 normally-closed contacts and the negative power supply output end of DC power supplier (1).
3. the electrical fuse circuit according to claim 1 or claim 2 for load control, it is characterised in that direct current
Source module (1) includes transformer T, rectifier bridge UR, 7805 voltage stabilizing chips, electrochemical capacitor C3 and electrochemical capacitor C4；
The both ends of transformer T primary coil connect the live wire L and zero line N of 220V AC powers respectively；Transformer T secondary coils
Both ends connection rectifier bridge UR two ac input ends, rectifier bridge UR cathode power supply output end connect electrochemical capacitor C3's simultaneously
1 pin of positive pole and 7805 voltage stabilizing chips, the 3 pin connection electrochemical capacitor C4 of 7805 voltage stabilizing chips positive pole, and it is used as dc source
The cathode power supply output end of module (1)；
Rectifier bridge UR negative power supply output end connects electrochemical capacitor C3 negative pole, 2 pin of 7805 voltage stabilizing chips and electrolysis simultaneously
Electric capacity C4 negative pole, and as the negative power supply output end of DC power supplier (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449369.XU CN206650419U (en) | 2017-04-26 | 2017-04-26 | Electrical fuse circuit for load control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720449369.XU CN206650419U (en) | 2017-04-26 | 2017-04-26 | Electrical fuse circuit for load control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206650419U true CN206650419U (en) | 2017-11-17 |
Family
ID=60277383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720449369.XU Expired - Fee Related CN206650419U (en) | 2017-04-26 | 2017-04-26 | Electrical fuse circuit for load control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206650419U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199344A (en) * | 2017-12-29 | 2018-06-22 | 河南北瑞电子科技有限公司 | A kind of household appliance protecting device |
| WO2020052296A1 (en) * | 2018-09-14 | 2020-03-19 | 厦门天力源光电科技有限公司 | Hybrid power supply-based electronic switch adjusting circuit and power supply |
-
2017
- 2017-04-26 CN CN201720449369.XU patent/CN206650419U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199344A (en) * | 2017-12-29 | 2018-06-22 | 河南北瑞电子科技有限公司 | A kind of household appliance protecting device |
| WO2020052296A1 (en) * | 2018-09-14 | 2020-03-19 | 厦门天力源光电科技有限公司 | Hybrid power supply-based electronic switch adjusting circuit and power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20171117 Termination date: 20180426 |