CN206180884U - A circuit for brownout power - Google Patents
A circuit for brownout power Download PDFInfo
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- CN206180884U CN206180884U CN201621164630.3U CN201621164630U CN206180884U CN 206180884 U CN206180884 U CN 206180884U CN 201621164630 U CN201621164630 U CN 201621164630U CN 206180884 U CN206180884 U CN 206180884U
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Abstract
The utility model discloses a circuit for brownout power, including load, first transformer, a full wave bridge rectifier, the second transformer, the 2nd full wave bridge rectifier, single monostable flip -flop and control module, control module is used for the switch -on or the disconnection of control load place circuit, the once side of first transformer links to each other with the power, and a secondary side and a full wave bridge rectifier link to each other, a full wave bridge rectifier still is connected with single monostable flip -flop and control module, the second transformer's once side and power, control switch and load are established ties, and the one end and the 2nd full wave bridge rectifier of the second transformer's secondary side link to each other, the 2nd full wave bridge rectifier and single monostable flip -flop are connected, single monostable flip -flop links to each other with control module. The utility model discloses can be according to the power limit value of actual conditions and different needs regulating circuits, the equipment of needing to be changed not, reliable and simple.
Description
Technical field
This utility model is related to a kind of circuit, in more detail, is related to a kind of circuit for limiting electric power.
Background technology
With the improvement of living condition, increasing electrical equipment is widely used in daily life, domestic
Electrical equipment refers mainly to various electrical equipment and the electronic apparatus used in family and similar site, also known as civil electric appliance, daily-use electrical appliance.Family
Electrical appliance, abbreviation household electrical appliances refer to electric energy be driven（Or with mechanical action）Apparatus, can help to perform family miscellaneous
Business, food of such as cooking a meal, food are preserved or are cleaned, in addition to home environment, it can also be used in company's line number or the environment of industry.Substantially
On, household electrical appliance are divided into white goods（White domestic appliances, black household appliances）And small household appliances.
The popularization of household electrical appliance not only makes people free from heavy, trifling, time-consuming housework, is mankind's wound
More comfortable grace made, be more beneficial for able-bodied live and work environment, also colourful text has been provided for people
Change amusement condition, therefore become the necessary of Modern Family's life；But with increasing for household electrical appliance quantity, function it is complete
Kind, the security incident caused due to use electrical equipment lack of standardization is happened occasionally, therefore, how the use electrical equipment of correct safety has been
Become particularly significant, especially in public arenas such as school dormitory, hotel, dining rooms, it is necessary to which the power of electrical equipment is limited
System, so as to ensure everybody safety of life and property.
Being used for limiting the product of power on the market, mostly to be power non-adjustable, no longer changes once be provided with limit value, such as
Fruit will reset, it is necessary to buy again new product, this mode not only waste money, also waste of resource.
Utility model content
The purpose of this utility model is to overcome the nonadjustable problem of restriction performance number in prior art, there is provided a kind of to be used to limit
The circuit of electric power processed, which can be according to practical situation and the different limit values for needing to adjust permission power, it is not necessary to change
Equipment, it is simple.
This utility model is solved the above problems by the following technical programs：
A kind of circuit for limiting electric power, including load, the first transformator, the first full-wave rectification bridge, the second change
Depressor, the second full-wave rectification bridge, monostable flipflop and control module；Four bridge arms head and the tail of the first full-wave rectification bridge phase successively
Even, four nodes are set to a points, b points, c points and d points successively；Four bridge arm head and the tail of the second full-wave rectification bridge are sequentially connected,
Four nodes are set to e points, f points, g points and h points successively；The control module be used for control load place circuit connection or
Disconnect, control module includes two inputs, is set to p ends and q ends, and the outfan of control module is set to r ends；Described first
The primary side of transformator is connected with power supply, and one end of secondary side is connected with a points of the first full-wave rectification bridge, the secondary side other end with
The c points of the first full-wave rectification bridge are connected；The b points ground connection of first full-wave rectification bridge, No. 4 of d points and monostable flipflop are drawn
Foot and No. 8 pins connect, and d points are connected with the p ends of control module；One end of the primary side of second transformator is by control
Switch is connected with one end of the primary side of the first transformator, and the other end of the primary side of the second transformator is become with first by load
The other end of the primary side of depressor is connected；One end of the secondary side of the second transformator is connected with the e points of the second full-wave rectification bridge, the
The other end of the secondary side of two transformators is connected with the g points of the second full-wave rectification bridge；The f points of second full-wave rectification bridge connect
Ground, and h points end has been sequentially connected in series second resistance, 3rd resistor and the 4th resistance, second resistance is relative to connect the another of 3rd resistor
One end is connected with h points, the other end ground connection of the relative connection 3rd resistor of the 4th resistance, and 3rd resistor is swept resistance, and slip is taken out
Head is connected with No. 2 pins and No. 6 pins of monostable flipflop；No. 3 pins of the monostable flipflop pass through the 5th resistance
It is connected with the q ends of control module.During using this utility model, the primary side of the first transformator and the second transformator with exchange
City's electrical connection of 220V, civil power Jing after the first transformer pressure-reducing, then through the first full-wave rectification bridge rectification, and by the electricity after rectification
Pressure is connected with No. 4 pins of monostable flipflop and No. 8 pins as the supply voltage of monostable flipflop；Accord with bearing power
In the case of closing regulation, controlling switch is connected, the primary side of the second transformator obtains electric, and by the second all wave rectification after blood pressure lowering
Bridge carries out rectification, and the voltage after rectification sends to monostable Jing after second resistance, 3rd resistor and the 4th electric resistance partial pressure as triggering
No. 2 pins and No. 6 pins of state trigger, now monostable flipflop No. 3 pin output high level, control module are motionless
Make, load circuit normal work；Conversely, when bearing power exceedes power limit value, No. 3 pin outputs of monostable flipflop are low
Level, control module action, and disconnect controlling switch, load circuit power-off；If user wants the power limit for changing circuit
Definite value, as long as changing the number of turn of the second transformator primary side or secondary side, accordingly even when in the case of being bearing power increase,
Monostable flipflop can be made to maintain the state that No. 3 pins export high level, so as to change power limit value.
Further, the control module includes relay, the first audion, the second audion, the 6th resistance and the 7th
Resistance；Normally-closed contact switch of the controlling switch for relay, relay and the 7th resistor coupled in parallel, and two sys nodes point
N points and m points are not set to, and n points are drawn as input p ends；One end of 6th resistance is connected with n points, the other end and the one or three
The colelctor electrode of pole pipe is connected；The colelctor electrode of the first audion is connected with the base stage of the second audion, the emitter stage of the first audion
It is connected with the emitter stage of the second audion, the colelctor electrode of the second audion is connected with the m points；The emitter stage of the first audion and
The emitter stage of the second audion is drawn jointly as outfan r ends, and r ends ground connection, and the base stage of the first audion is drawn as defeated
People end q ends.During using this utility model, when bearing power is in prescribed limit, the high electricity of No. 3 pin outputs of monostable flipflop
Flat, the first audion saturation, the cut-off of the second audion, relay are in release conditions, and controlling switch closure, load circuit are maintained
Normal power supply；Conversely, No. 3 pin output low levels of monostable flipflop, the cut-off of the first audion, the second audion saturation,
Relay obtains electric closure, and controlling switch disconnects, and load circuit disconnects.
Further, first is in series between the other end and m points of the relative connection n points of the 7th resistance in the control module
Light emitting diode, and the negative pole of the first light emitting diode is connected with m points.In this utility model, the first light emitting diode is used as electricity
Source display lamp is used.
Further, the control module is connected with fly-wheel diode between n points and m points, and fly-wheel diode is just
Pole is connected with m points.As relay can produce induction electromotive force when being opened or closed, fly-wheel diode is connected in parallel on into relay
Device two ends, form loop, the electromotive force of generation is consumed in the way of continuous electric current in the loop, so as to play unit in protection circuit
The effect that part is not damaged by.
Further, the 8th resistance has been sequentially connected in series between the n points and the emitter stage of the first audion of the control module
It is connected with the emitter stage of the first audion with the second light emitting diode, and the negative pole of the second light emitting diode.In this utility model,
Second light emitting diode is used as warning lamp, to facilitate staff to learn the excessive situation of bearing power in time.
Further, the two ends of the controlling switch are parallel with the first electric capacity.Contact of first electric capacity as controlling switch
Protection electric capacity, it is to avoid spark damage contact when controlling switch disconnects.
Further, also including the second electric capacity, one end of the second electric capacity is grounded, the d of the other end and the first full-wave rectification bridge
Point is connected.In this utility model, the second electric capacity is used as filter capacitor.
Further, also including the 3rd electric capacity, one end of the 3rd electric capacity is grounded, the h of the other end and the second full-wave rectification bridge
Point is connected.In this utility model, the 3rd electric capacity is used as filter capacitor.
The beneficial effects of the utility model are：
1st, can need to adjust the power limit value of circuit according to practical situation and difference, it is not necessary to more exchange device, simply
It is easy.
2nd, by arranging fly-wheel diode and the first electric capacity, can disconnect or close with effective protection relay and controlling switch
It is not damaged by during conjunction.
3rd, by arranging the second electric capacity and the 3rd electric capacity, the alternating current in circuit after rectification can be effectively filtered out, it is ensured that single
The power supply quality of steady state trigger, so that circuit operation is more accurate.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding this utility model embodiment, constitutes the one of the application
Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings：
Fig. 1 is this utility model structural representation.
Parts title in accompanying drawing corresponding to labelling：T1-the first transformator, T2-the second transformator, IC1-the first
Full-wave rectification bridge, IC2-the second full-wave rectification bridge, IC3-monostable flipflop, J-relay, JK-controlling switch, R1-
Load, R2-second resistance, R3-3rd resistor, R4-the 4th resistance, the resistance of R5-the 5th, the resistance of R6-the 6th, R7-the
Seven resistance, the resistance of R8-the 8th, C1-the first electric capacity, C2-the second electric capacity, the electric capacity of C3-the 3rd, V1-the first audion,
V2-the second audion, LED1-the first light emitting diode, LED2-the second light emitting diode, D1-fly-wheel diode.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, is not intended as to restriction of the present utility model.
Embodiment
As shown in figure 1, the present embodiment provides a kind of circuit for limiting electric power, including load R1, the first transformation
Device T1, the first full-wave rectification bridge IC1, the second transformator T2, the second full-wave rectification bridge IC2, monostable flipflop IC3 and control mould
Block；Four bridge arm head and the tail of the first full-wave rectification bridge IC1 are sequentially connected, and four nodes are set to a points, b points, c points and d successively
Point；Four bridge arm head and the tail of the second full-wave rectification bridge IC2 are sequentially connected, and four nodes are set to e points, f points, g points and h successively
Point.
Control module include relay J, the first audion V1, the second audion V2, the 6th resistance R6, the 7th resistance R7,
8th resistance R8, sustained diode 1, the first LED 1 and the second LED 2；7th resistance R7 first with
First LED 1 is connected, together in parallel with relay J, and two sys nodes are set to n points and m points, and n
Point is drawn as input p ends, wherein, the negative pole of the first LED 1 is connected with m points, positive pole and the 7th resistance R7 phases
The other end to connecting n points is connected；The two ends of relay J are also parallel with sustained diode 1, the positive pole and m of sustained diode 1
Point is connected, and the negative pole of sustained diode 1 is connected with n points；One end of 6th resistance R6 is connected with n points, the other end and the one or three pole
The colelctor electrode of pipe V1 is connected；The colelctor electrode of the first audion V1 is connected with the base stage of the second audion V2, the first audion V1's
Emitter stage is connected with the emitter stage of the second audion V2, and the colelctor electrode of the second audion V2 is connected with the m points；First audion
The emitter stage of the emitter stage of V1 and the second audion V2 is drawn jointly as outfan r ends, and r ends ground connection, the first audion V1
Base stage draw as input end q ends；8th resistance R8 has been sequentially connected in series also between the emitter stage of n points and the first audion V1
It is connected with the emitter stage of the first audion V1 with the second LED 2, and the negative pole of the second LED 2, the
The other end of the positive pole connection n points relative with the 8th resistance R8 of two LEDs 2 is connected.
The primary side of the first transformator T1 is connected with power supply, a point phases of one end of secondary side and the first full-wave rectification bridge IC1
Even, the other end of secondary side is connected with the c points of the first full-wave rectification bridge IC1；The b points ground connection of the first full-wave rectification bridge IC1, d points
It is connected with No. 4 pins and No. 8 pins of monostable flipflop IC3, and d points is connected with the p ends of control module, in addition, also includes
One end of second electric capacity C2, the second electric capacity C2 is connected with d points, other end ground connection；One end of the primary side of the second transformator T2 leads to
One end that controlling switch JK is crossed with the primary side of the first transformator T1 is connected, and the other end of the primary side of the second transformator T2 passes through
Load R1 is connected with the other end of the primary side of the first transformator T1, and the two ends of controlling switch JK are parallel with the first electric capacity C1, and
Controlling switch JK is switched for the normally-closed contact of relay J；One end of the secondary side of the second transformator T2 and the second full-wave rectification bridge
The e points of IC2 are connected, and the other end of the secondary side of the second transformator T2 is connected with the g points of the second full-wave rectification bridge IC2；Second is complete
The f points ground connection of ripple rectifier bridge IC2, and h points end has been sequentially connected in series second resistance R2,3rd resistor R3 and the 4th resistance R4, second
The other end of relative connection 3rd resistors R3 of resistance R2 is connected with h points, and the 4th resistance R4 is relative to connect the another of 3rd resistor R3
End ground connection, 3rd resistor R3 is swept resistance, and sliding tap is connected with No. 2 pins and No. 6 pins of monostable flipflop IC3,
In addition, also including the 3rd electric capacity C3, one end of the 3rd electric capacity C3 is connected with h points, the other end is grounded, the 3rd electric capacity C3 with connect
Second resistance R2,3rd resistor R3 and the 4th resistance R4 are parallel with one another；No. 3 pins of monostable flipflop IC3 are electric by the 5th
Resistance R5 is connected with the q ends of control module.
When implementing the present embodiment, the primary side of the first transformator T1 and the second transformator T2 is electrically connected with the city of alternating current 220V
Connect, civil power Jing after the first transformator T1 blood pressure lowerings, then through the first full-wave rectification bridge IC1 rectifications, and by the second electric capacity C2 to rectification
Electric current afterwards is filtered, the supply voltage and monostable trigger on the one hand as monostable flipflop of the voltage after rectifying and wave-filtering
No. 4 pins of device and No. 8 pin connections, on the other hand the input voltage as control module is connected to input p ends；In load work(
In the case that rate meets regulation, controlling switch JK is connected, the primary side of the second transformator T2 obtains electric, and by second after blood pressure lowering
Full-wave rectification bridge IC2 carries out rectification, and the electric current after rectification is filtered by the 3rd electric capacity C3, the voltage Jing after rectifying and wave-filtering
Second resistance R2,3rd resistor R3 and the 4th resistance R4 partial pressures are used as sending No. 2 of monostable flipflop IC3 to after trigger voltage
Pin and No. 6 pins, now monostable flipflop IC3 No. 3 pin output high level, the first audion V1 saturations, the two or three
Pole pipe V2 is ended, and relay J is in release conditions, and controlling switch JK is closed, load circuit maintenance normal power supply, and first luminous two
Pole pipe LED1 does not work；Conversely, No. 3 pin output low levels of monostable flipflop IC3, the first audion V1 cut-offs, the two or three
Pole pipe V2 saturation, relay J obtain electric closure, and controlling switch JK disconnects, and load circuit disconnects, and the first LED 1
Light points out staff；Second LED 2 is in the case where the first transformator T1 accesses civil power as power supply indicator
Can light always, until cutting off power supply.
If user wants the power limit value for changing circuit, can be by changing the second transformator T2 primary sides or secondary
The number of turn of side, accordingly even when being in the case that bearing power increases, accordingly even when being in the case that bearing power increases, it is also possible to
Monostable flipflop IC3 is made to maintain the state that No. 3 pins export high level, so as to change power limit value.
Monostable flipflop in the present embodiment is the monostable flipflop that 555 intervalometers are constituted.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect
One step is described in detail, be should be understood that to the foregoing is only specific embodiment of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent are replaced
Change, improve, should be included within protection domain of the present utility model.
Claims (8)
1. a kind of circuit for limiting electric power, including load（R1）, it is characterised in that including the first transformator（T1）、
First full-wave rectification bridge（IC1）, the second transformator（T2）, the second full-wave rectification bridge（IC2）, monostable flipflop（IC3）And control
Molding block；First full-wave rectification bridge（IC1）Four bridge arms head and the tail be sequentially connected, four nodes be set to successively a points, b points,
C points and d points；Second full-wave rectification bridge（IC2）Four bridge arms head and the tail be sequentially connected, four nodes are set to e points, f successively
Point, g points and h points；
The control module is used to control load（R1）Place circuit is switched on or switched off, and control module includes two inputs,
P ends and q ends are set to, the outfan of control module is set to r ends；
First transformator（T1）Primary side be connected with power supply, one end of secondary side and the first full-wave rectification bridge（IC1）A
Point is connected, the other end of secondary side and the first full-wave rectification bridge（IC1）C points be connected；
First full-wave rectification bridge（IC1）B points ground connection, d points and monostable flipflop（IC3）No. 4 pins and No. 8 pins
Connect, and d points are connected with the p ends of control module；
Second transformator（T2）Primary side one end pass through controlling switch（JK）With the first transformator（T1）Primary side
One end be connected, the second transformator（T2）Primary side the other end by load（R1）With the first transformator（T1）Primary side
The other end be connected；Second transformator（T2）Secondary side one end and the second full-wave rectification bridge（IC2）E points be connected, second
Transformator（T2）Secondary side the other end and the second full-wave rectification bridge（IC2）G points be connected；
Second full-wave rectification bridge（IC2）F points ground connection, and h points end has been sequentially connected in series second resistance（R2）, 3rd resistor
（R3）With the 4th resistance（R4）, second resistance（R2）Relative connection 3rd resistor（R3）The other end be connected with h points, the 4th resistance
（R4）Relative connection 3rd resistor（R3）The other end ground connection, 3rd resistor（R3）For swept resistance, sliding tap and monostable
Trigger（IC3）No. 2 pins and the connection of No. 6 pins；
The monostable flipflop（IC3）No. 3 pins pass through the 5th resistance（R5）It is connected with the q ends of control module.
2. a kind of circuit for limiting electric power according to claim 1, it is characterised in that the control module bag
Include relay（J）, the first audion（V1）, the second audion（V2）, the 6th resistance（R6）With the 7th resistance（R7）；The control
Switch（JK）For relay（J）Normally-closed contact switch, relay（J）With the 7th resistance（R7）Parallel connection, and two sys nodes
N points and m points are set to, and n points are drawn as input p ends；6th resistance（R6）One end be connected with n points, the other end with
First audion（V1）Colelctor electrode be connected；First audion（V1）Colelctor electrode and the second audion（V2）Base stage be connected,
First audion（V1）Emitter stage and the second audion（V2）Emitter stage be connected, the second audion（V2）Colelctor electrode and institute
State m points to be connected；First audion（V1）Emitter stage and the second audion（V2）Emitter stage draw as outfan r jointly
End, and r ends ground connection, the first audion（V1）Base stage draw as input end q ends.
3. a kind of circuit for limiting electric power according to claim 2, it is characterised in that in the control module
7th resistance（R7）The first light emitting diode is in series between the other end and m points of relative connection n points（LED1）, and first is luminous
Diode（LED1）Negative pole be connected with m points.
4. a kind of circuit for limiting electric power according to claim 2, it is characterised in that the control module exists
Fly-wheel diode is connected between n points and m points（D1）, and fly-wheel diode（D1）Positive pole be connected with m points.
5. a kind of circuit for limiting electric power according to claim 2, it is characterised in that the control module
N points and the first audion（V1）Emitter stage between be sequentially connected in series the 8th resistance（R8）With the second light emitting diode（LED2）,
And second light emitting diode（LED2）Negative pole and the first audion（V1）Emitter stage be connected.
6. a kind of circuit for limiting electric power according to claim 1, it is characterised in that the controlling switch
（JK）Two ends be parallel with the first electric capacity（C1）.
7. a kind of circuit for limiting electric power according to claim 1, it is characterised in that also including the second electric capacity
（C2）, the second electric capacity（C2）One end ground connection, the other end and the first full-wave rectification bridge（IC1）D points be connected.
8. a kind of circuit for limiting electric power according to claim 1, it is characterised in that also including the 3rd electric capacity
（C3）, the 3rd electric capacity（C3）One end ground connection, the other end and the second full-wave rectification bridge（IC2）H points be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164630.3U CN206180884U (en) | 2016-11-02 | 2016-11-02 | A circuit for brownout power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621164630.3U CN206180884U (en) | 2016-11-02 | 2016-11-02 | A circuit for brownout power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206180884U true CN206180884U (en) | 2017-05-17 |
Family
ID=58679778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621164630.3U Expired - Fee Related CN206180884U (en) | 2016-11-02 | 2016-11-02 | A circuit for brownout power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206180884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374426A (en) * | 2016-11-02 | 2017-02-01 | 成都俊巡科技有限公司 | Load power-based automatic cutoff circuit |
-
2016
- 2016-11-02 CN CN201621164630.3U patent/CN206180884U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374426A (en) * | 2016-11-02 | 2017-02-01 | 成都俊巡科技有限公司 | Load power-based automatic cutoff circuit |
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| 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: 20170517 Termination date: 20171102 |