CN208401547U

CN208401547U - Test power circuit

Info

Publication number: CN208401547U
Application number: CN201821063499.0U
Authority: CN
Inventors: 魏招锋
Original assignee: Xi'an Zhongke Permanent Environment Environmental Protection Technology Co Ltd
Current assignee: Xi'an Zhongke Permanent Environment Environmental Protection Technology Co Ltd
Priority date: 2018-07-05
Filing date: 2018-07-05
Publication date: 2019-01-18
Anticipated expiration: 2028-07-05

Abstract

The utility model relates to a kind of test power circuits, comprising: master switch；Automatic switch-over circuit, including first kind relay and runback key switch；First voltage switch groups circuit, including A.C. contactor I and the second class relay I；First power supply；Second source；Power output end；Wherein, the power supply control A.C. contactor I of first kind relay and runback key switch access master switch, which sequentially inputs power supply to the first power supply, the second class relay I, A.C. contactor I, power output end, exports first voltage by power output end, control A.C. contactor I, which sequentially inputs power supply to second source, the second class relay I, A.C. contactor I, power output end, exports second voltage by power output end, and automatically switches to first voltage and second voltage.The control function of conventional one-piece machine or PLC program is realized using pure hardware controls, as long as one powers on, a period only has a kind of power supply working, and cuts off all power supply outputs after power down simultaneously.

Description

Test power circuit

Technical field

The utility model relates to field of power supplies, in particular to a kind of test power circuit.

Background technique

Electronic product, either component, assembly unit, complete machine, equipment will carry out burn-in test.The purpose done so: detection Whether every equipment can operate normally；Detect whether every equipment will appear other problems after long-play；Simulation produces Product are in reality in use, the adverse effect that various factors generates product, then carries out the process that corresponding conditions reinforce experiment；Inspection Survey the stability of every equipment.

In the prior art, first method is that the power supply needed for preparing for current device connects end when it is desired to be used Sub- platform power supply to the device.Second method is the power supply needed for preparing for distinct device, then passes through single-chip microcontroller or PLC journey Sequence carries out relay switching, can be with the purpose of synchronism switching power supply when reaching switching machine.

One is provided according to every equipment since power supply is equipped with to multiple devices power supply for first method The quantity of power supply, such power supply will be very much, and operating in this way can be troublesome, and is easy wrong line, and equipment is caused to burn out； It powers according to a power supply to multiple devices, the volume and weight of such power supply can be very big, although it is numerous to can solve operation It is trivial, be easy wrong line the problem of, but will cause switch next machine when, need professional person to burn-in test producing line carry out Rewiring will also result in producing line problem difficult in maintenance in this way.

For second method, solve the whole drawbacks of the first, and easy to operate, due to being using program control System, thus can be very good arbitrarily to switch power supply using man-machine interface, and not need special messenger's maintenance, but disadvantage It is: needs to programme, the logic of such program is complex, and programmer is needed to develop, and hardware aspect is also required for special messenger's design； It needs to single-chip microcontroller or the individual power supply of PLC, increased costs；It needs to make special PCB circuit, needs to consider relay and each Kind power supply generates various to microelectronic circuit interference in use；Need to carry out whole system prolonged program and Adjustment debugging between hardware, causes the development time to increase, once single-chip microcontroller or PLC crash, each relay is caused to be in uncontrollable State, the output of each power supply, which merges, to be formed electric current and flows backward phenomenon, gently increases then each power supply power consumption, and fever is serious, heavy then can lead The electronic component of whole system is caused directly to burn out, if there are AC compounent in power branch, such power of alterating and direct current direct short-circuit, It will also result in inevitable loss.

Utility model content

The utility model embodiment provides a kind of test power circuit, and at least solving existing test power must make The technical issues of each power supply can just being switched over single-chip microcontroller or PLC circuit.

According to the one aspect of the utility model embodiment, a kind of test power circuit is provided, comprising:

Master switch；

Automatic switch-over circuit, including first kind relay and runback key switch；

First voltage switch groups circuit, including A.C. contactor I and the second class relay I；

First power supply；

Second source；

Power output end；

Wherein, the power supply of first kind relay and runback key switch access master switch controls A.C. contactor I for power supply It sequentially inputs to the first power supply, the second class relay I, A.C. contactor I, power output end by the first electricity of power output end output Power supply is sequentially input to second source, the second class relay I, A.C. contactor I, power supply and is exported by pressure, control A.C. contactor I End exports second voltage by power output end, and automatically switches to first voltage and second voltage.

Further, first kind relay includes the second relay, third relay, the 4th relay, and runback key is opened Close includes third runback key switch, the 4th runback key switch；

A.C. contactor I include the first A.C. contactor, the second A.C. contactor, the 4th A.C. contactor, the second class after Electric appliance I includes the 7th relay, the 8th relay；

Wherein, third relay accesses master switch and connect with the second relay, the 4th relay, and third runback key is opened It closes access master switch and is connect with third relay, the 4th relay；

First A.C. contactor is controlled by the second relay, third relay, the 4th relay and is connect with the first power supply, 4th A.C. contactor is controlled by the second relay, third relay, the 4th relay and is connect with second source, the first exchange Contactor, the 4th A.C. contactor are connected to the second A.C. contactor, the first power supply, the second electricity through the 4th runback key switch Source connect with the 7th relay, the 8th relay and is connected to power output end through the second A.C. contactor.

Further, the second relay includes relay Ray2, and third relay includes relay Ray3, the 4th relay Including relay Ray4, third runback key switch includes ship type switch SW3, and the 4th runback key switch includes ship type switch SW4；

First A.C. contactor includes A.C. contactor CJ1, and the second A.C. contactor includes A.C. contactor CJ2, and the 4th A.C. contactor includes A.C. contactor CJ4, and the 7th relay includes relay Ray7, and the 8th relay includes relay Ray8；

First power supply includes power supply U1 and power supply U1_1, and second source includes power supply U2 and power supply U2_1；

5, the 6 feet connection of relay Ray3 is followed by the positive pole of master switch, and 7 feet connect the power cathode of master switch, and 1 foot connects 1 foot of relay Ray4,22 feet of A.C. contactor CJ1, relay Ray2 1 foot, 3 feet of 3 foot contact relay Ray4, exchange 2 feet of 22 feet of contactor CJ4, relay Ray2, the connection of 4,8 feet be followed by 2 feet of ship type switch SW3, relay Ray4 8 Foot；

7 feet of relay Ray4 connect power cathode, 22 feet of 1 foot of 1 foot contact relay Ray2, A.C. contactor CJ1, and 3 22 feet of 2 feet of foot contact relay Ray2, A.C. contactor CJ4,8 feet connect 2 feet of ship type switch SW3；

5 feet of relay Ray2 connect the A2 foot of A.C. contactor CJ1, and 6 feet connect the A2 foot of A.C. contactor CJ4, and 7 feet connect electricity Source cathode, 1 foot connect 22 feet of A.C. contactor CJ1, and 2 feet connect 22 feet of A.C. contactor CJ4；

1 foot of ship type switch SW3 connects positive pole；2 feet of ship type switch SW4 connect 21 feet of A.C. contactor CJ1, exchange 21 feet of contactor CJ4,1 foot connect the A2 foot of A.C. contactor CJ2；

21 feet of A.C. contactor CJ1 connect 21 feet of A.C. contactor CJ4, and 3/L2 foot connects power cathode, 5/L3 foot and friendship The 1/L1 foot of stream contactor CJ4, the connection of 5/L3 foot are followed by positive pole, and A1 foot connects power cathode, and 4/T2 foot connects the 1 of power supply U1 1 foot of foot, power supply U1_1,6/T3 foot connect 2 feet of 2 feet of power supply U1, power supply U1_1；

The 1/L1 foot of A.C. contactor CJ4, the connection of 5/L3 foot, 3/L2 foot, A1 foot connect power cathode, 2/T1 foot contact relay 8 feet of 8 feet of Ray7, relay Ray8,4/T2 foot connect 1 foot of 1 foot of power supply U2, power supply U2_1, and 6/T3 foot connects the 2 of power supply U2 2 feet of foot, power supply U2_1；

2 feet of the 4 foot contact relay Ray7 of power supply U1,1 foot of 3 foot contact relay Ray7；4 feet of power supply U1_1 succeed electricity 2 feet of device Ray8,1 foot of 3 foot contact relay Ray8；4 feet of the 4 foot contact relay Ray7 of power supply U2,3 foot contact relay Ray7 3 feet；4 feet of the 4 foot contact relay Ray8 of power supply U2_1,3 feet of 3 foot contact relay Ray8；

8 feet of the 8 foot contact relay Ray8 of relay Ray7,7 feet connect power cathode, and 6 feet connect the 6/ of A.C. contactor CJ2 T3 foot, 5 feet connect the cathode of power output end；7 feet of relay Ray8 connect power cathode, and 6 feet meet the 4/T2 of A.C. contactor CJ2 Foot, 5 feet connect the cathode of power output end；The A1 foot of A.C. contactor CJ2 connects power cathode, and 5/L3 foot, that 3/L2 foot connects power supply is defeated The anode of outlet.

Further, power output end includes multidigit terminal board J1 and J2, and 5 feet of relay Ray7 meet multidigit terminal board J1 2 feet, 5 feet of relay Ray8 connect 2 feet of multidigit terminal board J2；The 5/L3 foot of A.C. contactor CJ2 meets multidigit terminal board J1 1 foot, 3/L2 foot connects 1 foot of multidigit terminal board J2.

Further, capacitor C1,1 foot and 2 of multidigit terminal board J2 are parallel between 1 foot and 2 feet of multidigit terminal board J1 Capacitor C2 is parallel between foot.

Further, power circuit further includes third power supply, the 4th power supply and second voltage switch groups circuit, second voltage Switch groups circuit includes A.C. contactor II and the second class relay II；

Wherein, the power supply of first kind relay and runback key switch access master switch controls second voltage switch groups circuit Power supply is sequentially input to third power supply, A.C. contactor II, the second class relay II, third is exported by the second class relay II Voltage, control second voltage switch groups circuit sequentially input power supply to the 4th power supply, A.C. contactor II, the second class relay II exports the 4th voltage by the second class relay II, and controls first voltage and second voltage automatically switches to tertiary voltage and the Four voltages.

Further, first kind relay further includes the first relay, the 5th relay, and runback key switch further includes Two runback key switches；

A.C. contactor II includes third A.C. contactor, the 5th A.C. contactor, and the second class relay II includes the 6th Relay, the 9th relay；

Wherein, the second runback key switch is connect with the first relay, the second relay, third relay, the first relay Device is connect with the second relay, the 4th relay, the 5th relay, third A.C. contactor, the 5th A.C. contactor, the 5th after Electric appliance and the second relay, third relay, the 4th relay, the 4th A.C. contactor, third power supply, the 4th power supply, third A.C. contactor, the connection of the 5th A.C. contactor；

Third power supply, the 4th power supply are connect and with the 6th relay, the 9th relay through third A.C. contactor, the 5th A.C. contactor is exported.

Further, the first relay includes relay Ray1, and the 5th relay includes relay Ray5, and the second runback is pressed Key switch includes ship type switch SW2；

Third A.C. contactor includes A.C. contactor CJ3, and the 5th A.C. contactor includes A.C. contactor CJ5, and the 6th Relay includes relay Ray6, and the 9th relay includes relay Ray9；

Third power supply includes power supply U3 and power supply U3_1, and the 4th power supply includes power supply U4 and power supply U4_1；

5 feet of 5 feet of the 1 foot contact relay Ray4 of ship type switch SW2, relay Ray1, the 8 of 2 foot contact relay Ray2 Foot, relay Ray1 8 feet and pass sequentially through rectifier diode D2, indicator light diode D1, resistance R1 and connect the 7 of relay Ray1 Foot；

5 feet of the 5 foot contact relay Ray4 of relay Ray1,7 feet connect power cathode, 6 feet of 3 foot contact relay Ray5, The A2 foot of the A2 foot of A.C. contactor CJ3, A.C. contactor CJ5,8 feet of 8 foot contact relay Ray2；

2 feet of 8 foot contact relay Ray2,3 feet of relay Ray3,3 feet of relay Ray4, exchange of relay Ray5 22 feet of contactor CJ4,4 feet connect 2 feet of 2 feet of power supply U3, power supply U3_1,2 feet connect 2 feet of power supply U4, power supply U4_1 2 Foot, 3 feet connect 1 foot of 1 foot of power supply U3, power supply U3_1, and 1 foot connects 1 foot of 1 foot of power supply U4, power supply U4_1, and 5,7 feet connect power supply Cathode, 6 feet connect the A2 foot of the A2 foot of A.C. contactor CJ3, A.C. contactor CJ5；

4 feet of the 4 foot contact relay Ray6 of power supply U3,3 feet of 3 foot contact relay Ray6；The 4 foot contact relays of power supply U4 2 feet of Ray6,1 foot of 3 foot contact relay Ray6；4 feet of the 4 foot contact relay Ray9 of power supply U3_1,3 foot contact relay Ray9 3 feet；2 feet of the 4 foot contact relay Ray9 of power supply U4_1,1 foot of 3 foot contact relay Ray9；

8 feet of relay Ray6 connect 22 feet of A.C. contactor CJ4, and 7 feet connect power cathode, and 6 feet meet A.C. contactor CJ3 6/T3 foot, 5 feet connect the 6/T3 foot of A.C. contactor CJ5；8 feet of relay Ray9 connect 22 feet of A.C. contactor CJ4,7 feet Power cathode is connect, 6 feet connect the 6/T3 foot of A.C. contactor CJ3, and 5 feet connect the 4/T2 foot of A.C. contactor CJ5；A.C. contactor The A1 foot of CJ3 connects power cathode, and the A1 foot of A.C. contactor CJ5 connects power cathode.

Further, power circuit further includes carrying out to first voltage, second voltage, tertiary voltage, the 4th voltage output The power supply of instruction exports indicating circuit, and power supply output indicating circuit includes four single indicating circuits in parallel, single indicating circuit by Indicator light diode and resistance are composed in series.

Further, master switch includes double-pole air switch, rectifier diode D3, indicator light diode D4 and current-limiting resistance R2。

In the utility model embodiment, the power supply of first kind relay and runback key switch access master switch, which controls, to be handed over Stream contactor I sequentially inputs power supply to the first power supply, the second class relay I, A.C. contactor I, power output end by power supply Output end exports first voltage, and control A.C. contactor I sequentially inputs power supply to second source, the second class relay I, exchange Contactor I, power output end export second voltage by power output end, and are cut automatically to first voltage and second voltage It changes, the control function of conventional one-piece machine or PLC program is realized using pure hardware controls, as long as one powers on, a period only has A kind of power supply is working, and cuts off all power supplys outputs after power down simultaneously.The utility model removes and fully achieves conventional one-piece machine or PLC Outside the repertoire of program, also solution the drawbacks of which is fallen, high reliablity；And due to using pure hardware development, it is not required to It wants special messenger to program, development cost and time is greatly reduced, in addition do not need dedicated power supply, saved cost；And it is not required to It wants special microelectronic circuit to design, is not required to consider the influence of electromagnetic compatibility, greatly reduces development difficulty.

Detailed description of the invention

Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model It limits.In the accompanying drawings:

Fig. 1 is that the utility model factory tests line chart；

Fig. 2 is a kind of connection block diagram of embodiment of the utility model test power circuit；

Fig. 3 is the circuit diagram of corresponding diagram 2；

Fig. 4 is the connection block diagram of the utility model test power circuit another kind embodiment；

Fig. 5 is the circuit connection diagram of corresponding diagram 4；

Fig. 6 is the circuit diagram that power supply exports indicating circuit in the utility model test power circuit；

Fig. 7 is the circuit diagram of master switch in the utility model test power circuit；

Fig. 8 is the control circuit relational graph of the utility model.

Specific embodiment

In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment is only the embodiment of the utility model a part, instead of all the embodiments.Based on the reality in the utility model Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered When the range for belonging to the utility model protection.

It should be noted that the specification and claims of the utility model and term " first " in above-mentioned attached drawing, " second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way The data used are interchangeable under appropriate circumstances, so that the embodiments of the present invention described herein can be in addition at this In illustrate or description those of other than sequence implement.In addition, term " includes " and " having " and their any deformation, meaning Figure be to cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units Those of be not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes, The intrinsic other step or units of method, product or equipment.

When the utility model is for factory's batch production air cleaning facility, according to the characteristic that cleaning equipment is run, customization The burn-in test producing line of correlation function test out.The utility model is equally applicable to the equipment or production that have demand to different voltages Product, as the test of the equipment of the LED light tape test of different voltages, the fan test of different voltages, different voltages, alternating current-direct current mix Power supply demand etc..Referring to Fig. 1, factory testing demand is as follows:

1. needing to carry out multiple devices complete machine burn-in test, whether every equipment of detection can be operated normally.

2. burn-in test power supply can be quickly switched on the items after replacement production items.

It is described as follows:

1. produce air purifier in batches, every produces the equipment finished, requires the aging for carrying out long-play Test guarantees that the air purifier of every arrival user terminal is all qualified products.

2. during air purifier burn-in test, needing the abnormal conditions occurred in analog subscriber use process, such as: disconnected It re-powers after electricity, can be coped with according to the function of normal design using unmatched power supply adaptor, equipment.

3. in equipment running process, each component of equipment whether normal operation, need the air cleaning to producing Device carries out burn-in test, judges by relevant tool or vision, the sense of hearing, smell etc..

4. pair equipment carries out over-voltage, under-voltage test, guarantee in electric voltage exception, equipment can start autoprotection machine Can, guarantee that cleaning equipment function is normal.

5. burn-in test board can quickly switch power to the test of the machine after the machine of producing line switching production On power supply.

6. can disconnect, prevent automatically in the power supply terminal shortcircuit of burn-in test power supply or the air purifier of access Work frequency circuit tripping or equipment heating seriously lead to the generation of fire.

7. have foolproof function, prevent maloperation from generating damage to equipment or test power supply, when carrying out operation control to panel When processed, it will not cause to test the generation damage of power source internal electronic component because of keystroke mis-operation.

The utility model is described in detail with specific embodiment below:

Embodiment 1

Embodiment according to the present utility model provides a kind of test power circuit, referring to fig. 2, comprising:

Master switch；

First power supply；

Second source；

Power output end；

The utility model realizes the control function of conventional one-piece machine or PLC program using pure hardware controls, as long as one powers on, One period only has a kind of power supply working, and cuts off all power supply outputs after power down simultaneously.The utility model is removed and is fully achieved Outside the repertoire of conventional one-piece machine or PLC program, also solution the drawbacks of which is fallen, high reliablity；And due to using Pure hardware development does not need special messenger's programming, development cost and time is greatly reduced, does not in addition need dedicated power supply, saves Cost；And special microelectronic circuit design is not needed, it is not required to consider the influence of electromagnetic compatibility, it is difficult to greatly reduce exploitation Degree.

Preferably, first kind relay includes the second relay, third relay, the 4th relay, runback key is opened Close includes third runback key switch, the 4th runback key switch；

Preferably, the second relay includes relay Ray2 referring to Fig. 3, third relay includes relay Ray3, the Four relays include relay Ray4, and third runback key switch includes ship type switch SW3, and the 4th runback key switch includes ship Type switch SW4；

Circuit thinking 1: burn-in test electric power output voltage V1, circuit thinking are master switch SW1 closure, and ship type switchs at this time SW2 is in off state, and electric current reaches the end A2 of A.C. contactor CJ1 by 1-5, the electric current of 5-1, Ray2 of Ray3, and triggering is handed over The each contact closure of contactor CJ1 is flowed, 3/L2-4/T2,5/L3-6/T3 closure of A.C. contactor CJ1, gives power supply V1 at this time (U1, U1_1 in figure) power supply, supply voltage V1 are output to A.C. contactor by the normally-closed contact 2-6 closure of relay Ray7 The 6/T3 of CJ2, since the auxiliary contact 21-22 of A.C. contactor CJ1 is closed, ship type switch SW4 is in normally off, so handing over Stream contactor CJ2 is in closed state, each contact closure, and supply voltage V1 is output to terminal board, completes supply voltage V1 output Movement, only needs the positive and negative anodes of air purifier to be connected to terminal board at this time and can be obtained corresponding power supply.

Circuit thinking 2: when burn-in test electric power output voltage V1, V1 is powered off and automatic recovery operation, circuit are thought The upper circuit thinking 1 of Lu Weicheng is constant, and voltage output is V1 at this time, presses when runback key, that is, ship type switch SW4, ship type switch SW4 is in off state, and A.C. contactor CJ2 is in off state, and V1 stops output, i.e. terminal board voltage is 0；When release ship Type switch SW4 restores closed state, triggers each contact closure of A.C. contactor CJ2, and V1 restores to export again.

Circuit thinking 3: circuit voltage is switched to the operation of V2 by V1, and circuit thinking is constant to hold circuit thinking 1, at this time Voltage output is V1, is pressed when runback key, that is, ship type switch SW3, and the 5-3 closure of relay Ray3, electric current is through relay The 6-2 closure of Ray2 reaches the A2 of A.C. contactor CJ4, triggers each contact closure of A.C. contactor CJ4, gives power supply V2 (figure Middle U2, U2_1) power supply, since the 1/L1-2/T1 of A.C. contactor CJ4 is closed, 4-6 and the 3-5 closure of trigger relay Ray7, The 4-6 and 3-5 of relay Ray8 is closed, and output voltage is switched to V2, due to the auxiliary contact 21-22 of A.C. contactor CJ4 Closure, and A.C. contactor SW4 is in normally off, so A.C. contactor CJ2 is in each contact closure state, supply voltage V2 is output to terminal board, completes supply voltage V2 output action, the positive and negative anodes of air purifier is only needed to be connected to terminal at this time Platform can be obtained corresponding power supply.

Circuit thinking 4: self-locking output V2 and automatically switching to the circuit of V1, and it is constant to hold circuit thinking 3, since ship type is opened It closes SW3 and uses self-complex switch, be off-state when not pressing, devising in circuit can make A.C. contactor CJ4 self-locking Circuit, since ship type switch SW3 is off-state, relay Ray3, relay Ray4 power down, in order to make A.C. contactor CJ4 Obtain alternating current L, by the 5 of relay Ray3 and 6 connection, the 4 and relay Ray3 of relay Ray3 8, relay Ray4 8 Connection, accordingly even when ship type switch SW3 be off-state, relay Ray3, relay Ray4 remain to it is in running order, i.e., it is defeated V2 out.It is disconnected when air switch SW1, relay Ray3, relay Ray4 are then disconnected, and export minimum voltage after re-powering V1。

Preferably, power output end includes multidigit terminal board J1 and J2,5 feet of relay Ray7 meet multidigit terminal board J1 2 feet, 5 feet of relay Ray8 connect 2 feet of multidigit terminal board J2；The 5/L3 foot of A.C. contactor CJ2 meets multidigit terminal board J1 1 foot, 3/L2 foot connects 1 foot of multidigit terminal board J2.Capacitor C1, multidigit end are parallel between 1 foot and 2 feet of multidigit terminal board J1 Capacitor C2 is parallel between 1 foot and 2 feet of sub- platform J2.J1 and J2 is multidigit terminal board, and clarifier is facilitated to connect.C1 and C2 is filter Wave bulky capacitor stores the effect of charge using it, plays a part of to filter and rectify, sparks in the case where circuit is under-voltage, Guaranteeing to switch suddenly because of circuit during voltage switches causes the unstable of electric current to damage equipment.

Embodiment 2

Another embodiment according to the present utility model, referring to fig. 4, power circuit further include third power supply, the 4th power supply and Second voltage switch groups circuit, second voltage switch groups circuit include A.C. contactor II and the second class relay II；

Preferably, first kind relay further includes the first relay, the 5th relay, runback key switch further includes Two runback key switches；

Preferably, the first relay includes relay Ray1 referring to Fig. 5, the 5th relay includes relay Ray5, the Two runback key switches include ship type switch SW2；

General thought, voltage V1 and V2 pass through ship type switching voltage V1 or V2 as big potential circuit group；Voltage V3 With V4 as small voltage circuit group, after being switched to decompression mode, pass through ship type switching voltage V3 or V4；

Circuit thinking 5: when burn-in test electric power output voltage V4, circuit thinking is constant to hold circuit thinking 1, electric at this time Pressure output is V1, is pressed when ship type switch SW2, and ship type switch SW2 is in the conductive state, and relay Ray2 is attracted, and exchange connects Tentaculum CJ1, CJ2, CJ4 are in off state, and V1 or V2 stop output；Relay Ray1 is attracted, and the 5-3 of relay Ray1 is led Logical, relay Ray5 is not attracted, and the 6-2 closure of relay Ray5,5-1 closure provides power supply to power supply U4 and U4_1 respectively, hands over It flows contactor CJ3 and A.C. contactor CJ5 and is closed output voltage V4.

Circuit thinking 6: when burn-in test electric power output voltage V3, circuit thinking is constant to hold circuit thinking 3, electric at this time Pressure output is V2, is pressed when ship type switch SW2, and ship type switch SW2 is in the conductive state, and relay Ray2 is attracted, and exchange connects Tentaculum CJ1, CJ2, CJ4 are in off state, and V1 or V2 stop output；Relay Ray1 is attracted, and the 5-3 of relay Ray1 is led Logical, since relay Ray3, relay Ray4 are attracting state, relay Ray5 is attracted, the 6-4 closure of relay Ray5,5-2 Closure provides power supply to power supply U3 and U3_1 respectively, and A.C. contactor CJ3 and A.C. contactor CJ5 are closed output voltage V4.

Preferably, power circuit further includes to first voltage V1, second voltage V2, tertiary voltage V3, referring to Fig. 7 Four voltage V4 export indicative power supply and export indicating circuit, and power supply output indicating circuit includes four single instruction electricity in parallel Road, single indicating circuit are composed in series by indicator light diode and resistance.Power supply indicator, when there is relevant supply voltage to export When, corresponding LED light can be lighted in panel, prompt current working condition, and wherein R1-R6 is current-limiting resistance, play protection LED's Effect.D2, D3 play rectified action using its unilateral conduction for general-purpose diode in alternating current circuit, make LED in exchange It remains to work normally in working environment.

Preferably, referring to Fig. 8, master switch include double-pole air switch, rectifier diode D3, indicator light diode D4 and Current-limiting resistance R2.As long as electric current is more than that rated current will disconnect automatically in circuit, in circuit abnormality, rear class can be protected electric Road, while can guarantee the safety of operation.

The utility model embodiment is designed for common four kinds of voltage in air purifier, and having buck can It adjusts, synchronous selection, fool proof operation, automatically switch, flash dodges the functions such as logical.It is specific as follows:

1. buck is adjustable: burn-in test power source internal integrates four kinds of Switching Power Supplies, and every kind of voltage and power are different, Different voltages can be selected by the button on panel.

2. synchronous selection: on each power branch, the power supply of specification of the same race in parallel connection, circuit equally can will be such The voltage synchronous of power supply exports, and achievees the purpose that increase tester table, increases output power.

3. fool proof operates: after burn-in test power cut-off, re-powering, guarantee output voltage for this group of test voltage most Small voltage prevents from causing unnecessary harm due to maloperation.

4. self-locking operation: after end of operation, burn-in test power supply can remember current operation (i.e. self-locking) automatically, and board can To receive the impact of big voltage large power supply for a long time.

5. automatically switching: when carrying out over-voltage, under-voltage test or switch test machine, not needing to power off, pass through key Voltage can be switched over, and be not in conflict between each voltage, prevented electric current when different voltages from flowing backward, power supply is caused to damage Bad and power consumption increases.

6. flash is dodged logical: simulation client using when power-off, re-power the case where.

7. working condition is shown: by the light on and off of different LED, indicate the working condition of current burn-in test power supply, such as: State 1, master switch are opened, 220Vac access；State 2, if decompression LED indication lights, expression is currently operating in low-voltage group, can Switch voltage V3/V4, if decompression LED indication is extinguished, expression is currently operating in high voltage group, switchable voltage V1/V2；If V1's LED indication lights, and expression current output voltage is V1；If the LED indication of V2 lights, expression current output voltage is V2；If V3 LED indication light, expression current output voltage be V3；If the LED indication of V4 lights, expression current output voltage is V4.

8. short-circuit protection function: if operating current is more than the rated current of air switch, air switch automatic trip is prevented 220Vac short circuit or rear end equipment operation irregularity cause to draw there are prolonged high current electric wire fever in circuit loop Play fire or damage Switching Power Supply.

9. power supply pressure stabilizing exports: in power supply handoff procedure, since the switching of relay moment will cause certain voltage wave Dynamic, ripple is larger at this time, can generate harm to rear end equipment circuit, so the output end in burn-in test power supply is provided with filtering And rectification circuit.

Referring specifically to Fig. 8, the circuit control relationship of the utility model embodiment is as follows:

Control panel is made of runback key and LED light, and after alternating current passes through air switch, user passes through to control plane Button operation on plate distinguishes the current state of current burn-in test power supply by observing LED light；Alternating current reaches control electricity Lu Hou selects working condition by control circuit, and then control switch power circuit and control output circuit are defeated to voltage It is selected, is finally exported power supply by output voltage terminals platform out.In first voltage switch groups circuit and second voltage In switch groups circuit, in the case where power is inadequate, power supply can be increase accordingly and high power relay upgrades circuit.

Parts selection explanation:

Common relay: since the electric current that it passes through is limited, and there is no defencive function, that is, cannot be jumped automatically when accident occurs Lock helps out in this circuit, for controlling A.C. contactor and high power relay, wherein relay Ray1-Ray5 For common conventional relays, relay Ray6-Ray9 is high power relay.

A.C. contactor: for controlling the confluence and output of high-power electric current in this circuit, it includes main contacts and auxiliary Contact.The effect of main contacts be to turn on disjunction major loop, control biggish electric current, and auxiliary contact have normally closed and normally open two Kind, auxiliary contact are applied in control loop in this circuit.A.C. contactor has arc-control device, for guaranteeing that contact disconnects electricity The electric arc of Lu Shi, generation reliably extinguish, and reduce damage of the electric arc to contact.

High power relay: biggish electric current is controlled.

Compared with prior art, the utility model has the beneficial effects that:

1. arbitrarily being switched as man-machine interface to power supply using panel, special messenger's maintenance is not needed.

2. not needing to programme, so not needing programmer's exploitation, the development time is reduced.

3. not needing extra power supply, save the cost.

4. not needing to make special PCB circuit, generated in use without the concern for relay and various power supplys The various interference to microelectronic circuit, exploitation is simple.

5. not needing to carry out whole system the adjustment debugging between prolonged program and hardware, the development time is saved.

6. the case where the operation is stable is not in similar single-chip microcontroller or PLC crash, is in so not will lead to each relay Uncontrollable state and the output of each power supply, which merge, forms electric current reverse irrigation phenomenon.

7. easy to operate when replacement test items, it is only necessary to press corresponding button and switch corresponding voltage.

8. carrying out stable power supply output for aging test production, when items are tested in replacement, replacement test electricity is not needed Source does not need to remove former power supply and reinstall.

9. it is easy to maintain, power circuit and circuit diagram comparison need to can only be found the problem a little, due to not needing to programme, So not needing professional's maintenance yet.

Above-mentioned the utility model embodiment serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.

In the above embodiments of the present invention, all emphasize particularly on different fields to the description of each embodiment, in some embodiment The part not being described in detail, reference can be made to the related descriptions of other embodiments.

In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of unit, can be one kind Logical function partition, there may be another division manner in actual implementation, such as multiple units or components can combine or can To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual Coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of unit or module, It can be electrical or other forms.

Unit may or may not be physically separated as illustrated by the separation member, shown as a unit Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple units On.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.

In addition, each functional unit in each embodiment of the utility model can integrate in one processing unit, It can be each unit to physically exist alone, can also be integrated in one unit with two or more units.It is above-mentioned integrated Unit both can take the form of hardware realization, can also realize in the form of software functional units.

It, can if integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product To be stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can for personal computer, server or network equipment etc.) execute each embodiment method of the utility model whole or Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code Medium.

The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and Retouching also should be regarded as the protection scope of the utility model.

Claims

1. a kind of test power circuit characterized by comprising

Master switch；

First power supply；

Second source；

Power output end；

Wherein, the power supply that the first kind relay and runback key switch access the master switch controls the A.C. contactor I sequentially inputs power supply to first power supply, the second class relay I, A.C. contactor I, power output end by the power supply Output end exports first voltage, controls the A.C. contactor I and sequentially inputs power supply to the second source, the second class relay Device I, A.C. contactor I, power output end export second voltage by the power output end, and to first voltage and second voltage Automatically switched.

2. power circuit according to claim 1, which is characterized in that the first kind relay include the second relay, Third relay, the 4th relay, the runback key switch include third runback key switch, the 4th runback key switch；

The A.C. contactor I include the first A.C. contactor, the second A.C. contactor, the 4th A.C. contactor, described second Class relay I includes the 7th relay, the 8th relay；

Wherein, the third relay accesses the master switch and connect with second relay, the 4th relay, and described the Three runback key switches access the master switch and connect with the third relay, the 4th relay；

First A.C. contactor is by second relay, third relay, the 4th relay control and with described first Power supply connection, the 4th A.C. contactor by second relay, third relay, the 4th relay control and with it is described Second source connection, first A.C. contactor, the 4th A.C. contactor are connected to through the 4th runback key switch Second A.C. contactor, first power supply, second source connect and pass through with the 7th relay, the 8th relay Second A.C. contactor is connected to the power output end.

3. power circuit according to claim 2, which is characterized in that second relay includes relay Ray2, institute Stating third relay includes relay Ray3, and the 4th relay includes relay Ray4, the third runback key switch Including ship type switch SW3, the 4th runback key switch includes ship type switch SW4；

First A.C. contactor includes A.C. contactor CJ1, and second A.C. contactor includes A.C. contactor CJ2, 4th A.C. contactor includes A.C. contactor CJ4, and the 7th relay includes relay Ray7, the 8th relay Device includes relay Ray8；

First power supply includes power supply U1 and power supply U1_1, and the second source includes power supply U2 and power supply U2_1；

5, the 6 feet connection of the relay Ray3 is followed by the positive pole of master switch, and 7 feet connect the power cathode of master switch, and 1 foot connects 1 foot of relay Ray4,22 feet of A.C. contactor CJ1, relay Ray2 1 foot, 3 feet of 3 foot contact relay Ray4, exchange 2 feet of 22 feet of contactor CJ4, relay Ray2, the connection of 4,8 feet be followed by 2 feet of ship type switch SW3, relay Ray4 8 Foot；

7 feet of the relay Ray4 connect power cathode, 22 feet of 1 foot of 1 foot contact relay Ray2, A.C. contactor CJ1, and 3 22 feet of 2 feet of foot contact relay Ray2, A.C. contactor CJ4,8 feet connect 2 feet of ship type switch SW3；

5 feet of the relay Ray2 connect the A2 foot of A.C. contactor CJ1, and 6 feet connect the A2 foot of A.C. contactor CJ4, and 7 feet connect electricity Source cathode, 1 foot connect 22 feet of A.C. contactor CJ1, and 2 feet connect 22 feet of A.C. contactor CJ4；

1 foot of the ship type switch SW3 connects positive pole；2 feet of the ship type switch SW4 connect A.C. contactor CJ1 21 feet, 21 feet of A.C. contactor CJ4,1 foot connect the A2 foot of A.C. contactor CJ2；

21 feet of the A.C. contactor CJ1 connect 21 feet of A.C. contactor CJ4, and 3/L2 foot connects power cathode, 5/L3 foot and friendship The 1/L1 foot of stream contactor CJ4, the connection of 5/L3 foot are followed by positive pole, and A1 foot connects power cathode, and 4/T2 foot connects the 1 of power supply U1 1 foot of foot, power supply U1_1,6/T3 foot connect 2 feet of 2 feet of power supply U1, power supply U1_1；

The 1/L1 foot of the A.C. contactor CJ4, the connection of 5/L3 foot, 3/L2 foot, A1 foot connect power cathode, 2/T1 foot contact relay 8 feet of 8 feet of Ray7, relay Ray8,4/T2 foot connect 1 foot of 1 foot of power supply U2, power supply U2_1, and 6/T3 foot connects the 2 of power supply U2 2 feet of foot, power supply U2_1；

2 feet of the 4 foot contact relay Ray7 of the power supply U1,1 foot of 3 foot contact relay Ray7；4 feet of the power supply U1_1 connect 2 feet of relay Ray8,1 foot of 3 foot contact relay Ray8；4 feet of the 4 foot contact relay Ray7 of the power supply U2,3 feet are succeeded 3 feet of electric appliance Ray7；4 feet of the 4 foot contact relay Ray8 of the power supply U2_1,3 feet of 3 foot contact relay Ray8；

8 feet of the 8 foot contact relay Ray8 of the relay Ray7,7 feet connect power cathode, and 6 feet connect the 6/ of A.C. contactor CJ2 T3 foot, 5 feet connect the cathode of power output end；7 feet of the relay Ray8 connect power cathode, and 6 feet connect A.C. contactor CJ2's 4/T2 foot, 5 feet connect the cathode of power output end；The A1 foot of the A.C. contactor CJ2 connects power cathode, 5/L3 foot, 3/L2 foot Connect the anode of power output end.

4. power circuit according to claim 3, which is characterized in that the power output end include multidigit terminal board J1 and J2,5 feet of the relay Ray7 connect 2 feet of multidigit terminal board J1, and 5 feet of the relay Ray8 connect multidigit terminal board J2's 2 feet；The 5/L3 foot of the A.C. contactor CJ2 connects 1 foot of multidigit terminal board J1, and 3/L2 foot connects 1 foot of multidigit terminal board J2.

5. power circuit according to claim 4, which is characterized in that between 1 foot and 2 feet of the multidigit terminal board J1 simultaneously It is associated with capacitor C1, is parallel with capacitor C2 between 1 foot and 2 feet of the multidigit terminal board J2.

6. power circuit according to claim 3, which is characterized in that the power circuit further includes third power supply, the 4th Power supply and second voltage switch groups circuit, the second voltage switch groups circuit include A.C. contactor II and the second class relay II；

Wherein, the power supply that the first kind relay and runback key switch access the master switch controls the second voltage and cuts Group circuit is changed to sequentially input power supply to the third power supply, A.C. contactor II, the second class relay II by second class Relay II export tertiary voltage, control the second voltage switch groups circuit by power supply sequentially input to the 4th power supply, A.C. contactor II, the second class relay II by the second class relay II export the 4th voltage, and control first voltage and Second voltage automatically switches to tertiary voltage and the 4th voltage.

7. power circuit according to claim 6, which is characterized in that the first kind relay further includes the first relay Device, the 5th relay, the runback key switch further include the second runback key switch；

The A.C. contactor II includes third A.C. contactor, the 5th A.C. contactor, and the second class relay II includes 6th relay, the 9th relay；

Wherein, the second runback key switch is connect with first relay, the second relay, third relay, described First relay and second relay, the 4th relay, the 5th relay, third A.C. contactor, the 5th ac contactor Device connection, the 5th relay and second relay, third relay, the 4th relay, the 4th A.C. contactor, the Three power supplys, the 4th power supply, third A.C. contactor, the connection of the 5th A.C. contactor；

The third power supply, the 4th power supply connect with the 6th relay, the 9th relay and connect through third exchange Tentaculum, the 5th A.C. contactor are exported.

8. power circuit according to claim 7, which is characterized in that first relay includes relay Ray1, institute Stating the 5th relay includes relay Ray5, and the second runback key switch includes ship type switch SW2；

The third A.C. contactor includes A.C. contactor CJ3, and the 5th A.C. contactor includes A.C. contactor CJ5, 6th relay includes relay Ray6, and the 9th relay includes relay Ray9；

The third power supply includes power supply U3 and power supply U3_1, the 4th power supply include power supply U4 and power supply U4_1；

5 feet of 5 feet of the 1 foot contact relay Ray4 of the ship type switch SW2, relay Ray1, the 8 of 2 foot contact relay Ray2 Foot, relay Ray1 8 feet and pass sequentially through rectifier diode D2, indicator light diode D1, resistance R1 and connect the 7 of relay Ray1 Foot；

5 feet of the 5 foot contact relay Ray4 of the relay Ray1,7 feet connect power cathode, 6 feet of 3 foot contact relay Ray5, The A2 foot of the A2 foot of A.C. contactor CJ3, A.C. contactor CJ5,8 feet of 8 foot contact relay Ray2；

2 feet of 8 foot contact relay Ray2,3 feet of relay Ray3,3 feet of relay Ray4, exchange of the relay Ray5 22 feet of contactor CJ4,4 feet connect 2 feet of 2 feet of power supply U3, power supply U3_1,2 feet connect 2 feet of power supply U4, power supply U4_1 2 Foot, 3 feet connect 1 foot of 1 foot of power supply U3, power supply U3_1, and 1 foot connects 1 foot of 1 foot of power supply U4, power supply U4_1, and 5,7 feet connect power supply Cathode, 6 feet connect the A2 foot of the A2 foot of A.C. contactor CJ3, A.C. contactor CJ5；

4 feet of the 4 foot contact relay Ray6 of the power supply U3,3 feet of 3 foot contact relay Ray6；4 feet of the power supply U4 are succeeded 2 feet of electric appliance Ray6,1 foot of 3 foot contact relay Ray6；4 feet of the 4 foot contact relay Ray9 of the power supply U3_1,3 feet are succeeded 3 feet of electric appliance Ray9；2 feet of the 4 foot contact relay Ray9 of the power supply U4_1,1 foot of 3 foot contact relay Ray9；

8 feet of the relay Ray6 connect 22 feet of A.C. contactor CJ4, and 7 feet connect power cathode, and 6 feet meet A.C. contactor CJ3 6/T3 foot, 5 feet connect the 6/T3 foot of A.C. contactor CJ5；8 feet of the relay Ray9 connect 22 feet of A.C. contactor CJ4, 7 feet connect power cathode, and 6 feet connect the 6/T3 foot of A.C. contactor CJ3, and 5 feet connect the 4/T2 foot of A.C. contactor CJ5；The exchange The A1 foot of contactor CJ3 connects power cathode, and the A1 foot of the A.C. contactor CJ5 connects power cathode.

9. power circuit according to claim 8, which is characterized in that the power circuit further includes to first electricity The indicative power supply of pressure, second voltage, tertiary voltage, the 4th voltage output exports indicating circuit, the power supply output instruction Circuit includes four single indicating circuits in parallel, and the list indicating circuit is composed in series by indicator light diode and resistance.

10. power circuit according to claim 9, which is characterized in that the master switch includes double-pole air switch, rectification Diode D3, indicator light diode D4 and current-limiting resistance R2.