CN205377820U - Difunctional timing power control circuit of a section - Google Patents

Abstract

The utility model provides a difunctional timing power control circuit of a section contains digital timing circuit, RC total mark timing circuit and implementation of circuit triplex: digit timing circuit adopts two binary counting chips to cascade and forms, and two count chips all connect into electric reset structure, total mark timing circuit mainly comprises R9, R10, C4 and voltage comparater, implementation of circuit mainly comprises triode, relay, single throw ganged switch. The utility model discloses that solves only needs single throw ganged switch of operation just can realize that electronic equipment power supply's timing auto -power -off and manual instant outage are difunctional.

Description

A Double-function timing power control circuit

Technical field

This utility model is related to the power supply of electronic equipment and provides timing automatic power-off and manual instant two kinds of functions of power-off, belongs to application of electronic technology field.

Background technology

Power supply is that all electric equipments have to use for electronic module, and closing power supply is exactly thoroughly close electric equipment.Generally from the requirement of secure context, or from the requirement of saves energy, or from the viewpoint of extending electrical equipment service life, electrical equipment needs to cut out power supply in time after a procedure.Common on and off switch, by manual operation, is sometimes forgotten the power supply closing some equipment, is not in use also energized for a long time because being busy with one's work, and not only affects service life of structure, thus brings potential safety hazard worse.What form with it substantially contrast is that present many electronic equipments all enable automatic circuit break function, such as terminal, pot-type boiler, timing electric cooker etc., brings great convenience to user.Particularly in the place that the electric equipment such as office, electronic leaning laboratory is various, automatic circuit break function has practicality more.

Except the control system that some is special, it is all realize automatic circuit break function by intervalometer.Early stage is generally adopted mechanical timer, simple to operate but timing accuracy is relatively low；Current great majority are that to adopt SCM Based electronic timer be main, and timing accuracy is high, have comparison many function is set.The function that arranges of these complexity is its advantage, is also its familiar lacunas simultaneously, at least operationally seems loaded down with trivial details.Some are had to have only to simply fix timing, such as the electric heating appliances such as the ligthing paraphernalia of office, electric cautery, router, electronic measuring instrument etc., it uses the time no more than four hours continuously, it is possible to adopt set time intervalometer, exempt and requirement is set, more convenient to use.

In actual use, SCM Based electronic timer is easily subject to various factors and damages, often there is mistake because being interfered in the program of the problem etc., particularly single-chip microcomputer run including the problem of hardware circuit and program, and thus reduces the service life of intervalometer.If adopting the intervalometer that pure hardware circuit is constituted, its functional reliability can be higher.

Certainly, some electric equipments are also had to need long-time use continuously, it is possible to not to be that intervalometer can solve, it is desired nonetheless to manual operation is proper, more conforms to the random requirement of people.Generally use such as network router the time less than four hours continuously, but when running into download large program, the use time is impossible to secure, now still with manual operation for appropriate.Manually-operated on and off switch also has the necessity of its existence.

Electronic timer requires over an execution unit and controls power supply through and off.Most execution units is relay, and also having some is powerful electrical switch, and also known as solid-state relay, they are required for meeting the requirement of the running voltage and operating current that are controlled power supply.

Therefore, to facilitate use for target, design one and not only can realize set time timing needs but also the power on-off control circuit of manual operation requirement can be met, there is practical value certainly.This utility model has only to one hand switch of operation, realizes the timing automatic power-off of power electronic equipment power supply with simplest operational approach and manually instant power-off is difunctional.

Summary of the invention

To be solved in the utility model is realize the timing automatic power-off of power electronic equipment power supply and manual instant two functions of power-off.From technological layer, have the feature that

A Double-function timing power control circuit comprises digital timing circuit, RC integral timing circuit and performs circuit three part, as shown in Figure 1；Digital timing circuit adopts two pieces of binary counting chip cascades of CD4060 and CD4040 to form, two counting chips all connect into electrification reset structure, count pulse is produced by CD4060 chip self, and an end in the 12nd to the 14th outfan of CD4040 is connected to audion Q₁Base stage, as shown in Figure 2；R₉、R₁₀、C₄Constitute integrating circuit, wherein R₁₀Being connected to+12V power line by a switch, the output current potential of RC integrating circuit is by voltage comparator ic_3AConverting the output of high and low level two-value to, connect light emitting diode D₂After be connected to Q₂Pipe base stage, Q₂The colelctor electrode of pipe is connected to audion Q₁Base stage, converge with digital timing circuit control signal, Q₁And Q₂Two emitter stages of pipe link together；Perform circuit by audion Q₁, relay J K₁, ganged switch S₁Composition, relay J K₁Two drive ends be connected to audion Q₁Colelctor electrode and ground wire between, relay J K₁Normally opened contact and ganged switch S₁In one switch parallel with one another after, then with AC-DC voltage dropping power supply input port, electric fuse F₁It is series in 220V AC network；Only need to operate one singly to throw ganged switch and just can realize the timing automatic power-off of power electronic equipment power supply and manually power-off immediately is difunctional.

This utility model is according to ganged switch S₁One of these two kinds of functions are selected: as switch S from length interval time being closed between disconnection₁After Guan Bi, disconnection immediately is exactly the timing power-off function of power supply；As switch S₁Persistently Guan Bi wouldn't disconnect for more than 1 second is exactly manual instant power down function.

Under timing automatic power down function pattern, RC integral timing circuit is inoperative, and with digital timing circuit continuous firing that CD4060 and CD4040 counting chip is core.Before completing timing, the effective outfan of CD4040 is low level, audion Q₁Conducting, relay adhesive makes execution circuit be continuously turned on.After completing timing, the effective outfan of CD4040 becomes high level, audion Q₁Disconnecting, relay switch release makes execution circuit disconnect, and whole power loss achieves timing function.

Manually under instant power down function pattern, switch S₁Wouldn't disconnecting after Guan Bi, RC integral timing circuit plays a role.Comparison accompanying drawing 2 is analyzed, voltage comparator ic_3AIn-phase end voltage be 4.0V；End of oppisite phase voltage is along with electric capacity C₄Charging and raise, rise to 4.0V from 0V and take around 1 second.Through about 1 second, when the end of oppisite phase voltage of voltage comparator is higher than in-phase end voltage, comparator output low level, audion Q₂Conducting so that audion Q₁Open circuit, relay switch is constantly in off-state, places one's entire reliance upon hand switch S thus performing circuit₁If now disconnecting switch S₁Can cut off the electricity supply immediately circuit.

The oscillating circuit that carries of CD4060 affects timing, and computing formula is shown below.

$t_1\≈\frac{R_2{C}_1}{2.2}\×2^{QA}\×2^{QB}$

Wherein QA refers to the outfan divider ratio of CD4060, as taken the output of Q14 end, then QA=14, takes the output of Q13 end, then QA=13；Equally, QB refers to the outfan divider ratio of CD4040, as taken the output of Q9 end, then QB=9, takes the output of Q8 end, then QB=8.Timing when connecting by Fig. 2 circuit is approximately 394 minutes:

$t_1\≈\frac{620\×{10}^3\×0.01\×{10}^{-6}}{2.2}\×2^{14}\×2^9=23640s$

Namely timing closes power supply after 6 hours 34 minutes.Change the frequency dividing port of counting chip to realize the digital timing time and adjust at double, change frequency of oscillation and realize the continuous adjustment of digital timing time.Once port and component parameters are fixed, timing also just immobilizes.

Ganged switch S₁Closing time determines timing automatic power-off and the selection of manual instant two kinds of functions of power-off, and this differentiation time is exactly electric capacity C₄The time used by 4.0V is charged to by 0V.The relation in known charge electric capacity both end voltage and charging interval is:

$U_t=U\×(1-e^{-\frac{t}{{\mathrm{RC}}_4}})$

Wherein U_tReferring to the magnitude of voltage on t electric capacity, U refers to the magnitude of voltage that electric capacity may finally be charged to, and namely 6V, R are R₉And R₁₀Parallel value.So electric capacity charges to the 4.0V time and is approximately:

$t=-\frac{R_9{R}_{10}}{R_9+R_{10}}{C}_4*Ln(1-\frac{U_t}{U})=-0.5\×{10}^6\×2\×{10}^{-6}Ln(1-\frac{4.0}{6})\≈1.1s$

Namely S is switched₁From being timing automatic power down function when being closed into the interval of disconnection less than 1.1 seconds, switch S₁Lasting service time was exactly manual instant power down function more than 1.1 seconds.It is the operating habit considering common people using 1.1 seconds as the differentiation time, it is also possible to be designed to At All Other Times, to shorten this differentiation time, it is possible to reduce R₇And with R₈Resistance ratio；To increase this differentiation time, it is possible to increase R₇And with R₈Resistance ratio.

Light emitting diode D₂The display lamp of non-timed function can be in as circuit.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of a Double-function timing power control circuit of this utility model；

In figure: S₁It it is ganged switch；JK₁It it is relay；Q₁It it is crystal triode.

Fig. 2 is the schematic diagram of a Double-function timing power control circuit of this utility model；

In figure: IC₁It is binary counting chip CD4060；IC₂It is binary counting chip CD4040；IC_3AIt it is voltage comparator；D₂It it is light emitting diode；Q₁、Q₂It is crystal triode.

Detailed description of the invention

Below in conjunction with accompanying drawing of the present utility model, enforcement of the present utility model is described further.

From the outer functional unit of Timing power supply, similar with common power, only one of which on and off switch S₁, but switching manipulation mode of the present utility model is different from common power.When we need selection to be automatically closed at regular time power supply function, it should S will be switched₁Guan Bi power supply obtain electric after disconnect rapidly, power supply is automatically switched off after the time that digital clock sets.When we need to select manually instant closedown power supply, according to usual use habit Guan Bi switch S₁After remain up more than 1 second；Electrical appliance is without using time restriction, it is necessary to close manual operation disconnecting power switch S during power supply₁.If needing to close power supply during timing, as long as being again switched on switch S₁And continue more than 1 second kind, it is then shut off.Wherein relay J K₁With ganged switch S₁Contact current capacity should meet the needs of mains input current.

The differentiation time arranging two kinds of functions was advisable with the 1-2 second, by changing resistance R₇、R₈Ratio adjusted, R₇/R₈Value more little, distinguish the time more long, according to being 1.1 seconds between the parameter region timesharing in accompanying drawing 2, it is also possible to proper extension distinguishes the time.

Timing power supply is preset timing and can be set about processing from two aspects: one is the frequency dividing port selecting counting chip, and two is the oscillating element energy parameter changing CD4060, namely adjusts resistance R in accompanying drawing 2₂, electric capacity C₁Resistance and capacitance.Final timing is as the criterion with reality test.

This utility model circuit is applicable to the every field such as testing stand power supply is powered, wireless router power supply is powered, office power is powered, and realizes the timing automatic power-off of power electronic equipment power supply with simplest operational approach and manually instant power-off is difunctional.Not only improve saves energy and advantageously reduce again potential safety hazard.

Claims (2)

1. a Double-function timing power control circuit structure, its architectural feature is in that: control circuit comprises digital timing circuit, RC integral timing circuit and performs circuit three part；Digital timing circuit adopts two pieces of binary counting chip cascades of CD4060 and CD4040 to form, and two counting chips all connect into electrification reset structure, and an end in the 12nd to the 14th outfan of CD4040 is connected to audion Q₁Base stage；R₉、R₁₀、C₄Constitute integrating circuit, wherein R₁₀Being connected to+12V power line by a switch, the output current potential of RC integrating circuit is by voltage comparator ic_3AConverting the output of high and low level two-value to, connect light emitting diode D₂After be connected to Q₂Pipe base stage, Q₂The colelctor electrode of pipe is connected to audion Q₁Base stage, converge with digital timing circuit control signal, Q₁And Q₂Two emitter stages of pipe link together；Perform circuit by audion Q₁, relay J K₁, ganged switch S₁Composition, relay J K₁Two drive ends be connected to audion Q₁Colelctor electrode and ground wire between, relay J K₁Normally opened contact and ganged switch S₁In one switch parallel with one another after, then with AC-DC voltage dropping power supply input port, electric fuse F₁It is series in 220V AC network.

2. a Double-function timing power control circuit structure according to claim 1, only need to operate one and singly throw ganged switch and just can realize the timing automatic power-off of power electronic equipment power supply and manually power-off immediately is difunctional.