CN201413482Y - Runaway state prevention general-purpose control circuit - Google Patents
Runaway state prevention general-purpose control circuit Download PDFInfo
- Publication number
- CN201413482Y CN201413482Y CN2008200956956U CN200820095695U CN201413482Y CN 201413482 Y CN201413482 Y CN 201413482Y CN 2008200956956 U CN2008200956956 U CN 2008200956956U CN 200820095695 U CN200820095695 U CN 200820095695U CN 201413482 Y CN201413482 Y CN 201413482Y
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- circuit
- input end
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002265 prevention Effects 0.000 title abstract 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 14
- 101100027017 Caenorhabditis elegans ntc-1 gene Proteins 0.000 description 7
- 230000001960 triggered effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000012039 electrophile Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A runaway state prevention general-purpose control circuit pertains to a technical field of using a analog integrated circuit operational amplifier as a core device and forming a control circuit by designing a connection mode of the core device.In order to improve the safety of a simple overrun bit control circuit by preventing the generation of a runaway state caused by fault, the runaway state prevention general-purpose control circuit comprises a protective circuit consisting of operational amplifiers and diodes, electric resistance, the output thereof is a protection display output end, and a parallel connection end of the two operational amplifiers is an input end; an overrun bit control circuit consisting of operational amplifiers and diodes, electric resistance, the output thereof is a protection display output end, and a parallel connection end of the two operational amplifiers is an input end, the electric resistance and the diodes are in a logical relationship, an overrun bitfor runaway state prevention and a triggering return difference are set at a voltage dividing point of the series-connected electric resistance.Therefore, runaway states caused by fault can be prevented and safety of the controlling of temperature, pressure, water level and the like can be improved. The runaway state prevention general-purpose control circuit can be used as a monitoring protection device for small appliances.
Description
Technical field
The utility model belongs to and utilizes Analogous Integrated Electronic Circuits operational amplifier (or voltage comparator) as core devices, with connected mode cleverly simple constitute prevent universal control circuit out of control.Its principle is: the inner control circuit of protecting adopts feedback and low or antimode, to transfiniting position control (master control) circuit or the back anti-phase driving circuit of level monitored.Thereby make it have unique critical function: when input sensing circuit generation abnormal failure (as the Ntc broken string), can in time protect control (protecting control) and fault to show (protect and show), prevent that governor circuit is out of control.Be applied in the control circuits such as temperature, pressure, water level, can improve security performance, avoid a nasty accident (as fire) takes place.Owing to cost extremely low (8 pin package can be held two or three element circuits, and external circuit is simple), therefore, the utility model is wider in electronic application field purposes such as small household appliances and simple and easy control circuits, and makes product/price ratio higher again.
Background technology
In order to examine novelty of the present utility model, the designer has consulted a large amount of correlation technique data (professional book, newpapers and periodicals), has retrieved relevant patent documentation.All have only and find to finish the circuit of control (master control) function more (555 time base circuits are exactly classical representative) that transfinites, never find to relate to abnormal failure is monitored, governor circuit is monitored (protecting control), prevented unusual correlation technique data out of control.
At present, electronic application field be used widely through canonical form 555 time base circuits, as most basic versatility function element, enjoy electronic application professional designer and electrophile's favor, and now obtained the common approval of academia, a lot of university's electronics specialty " digital circuit " textbooks are listed 555 time base circuits in certain chapters and sections, and its inner structure and principle are made thoroughgoing and painstaking theoretical analysis.
Though it is, of many uses through canonical form 555 time base circuit highly versatiles.But have only single master control (the position control of transfiniting) function, inner structure is complicated, roughly is made up of five parts such as voltage divider, comparer, R-S trigger, rp-drive, discharge switch.8 of leading foot positions are if CMOS type 555 circuit are also wanted many two phase inverters (is used to reset, and another is located between R-S trigger Q end and the driver).Its principle is: voltage divider is provided with upper and lower bound; comparer will import current potential and the upper limit is made comparisons; if the input current potential exceeds the upper and lower bound current potential; two comparers trigger the R end or the S end of R-S trigger respectively; Q end output respective electrical mean longitude driver output control load; this control procedure and principle; can only finish a control function that transfinites; there is not the emergency protection control function fully; be void item, have not good part in addition on performance, it is improper that reset terminal MR (the 4th pin) reset potential is provided with; and discreteness is too big, can not make comparisons with the input current potential again.Control end VC (the 5th pin) upper limit of can only transfering to other localities, lower limit is built-in fixing, and VC is essential to electric capacity.
Summary of the invention
When the purpose of this utility model designs a kind of abnormal failure exactly, master control (the position control of transfiniting) circuit there is the universal circuit module of monitoring (protection control) function.Solve an existing simple and easy control circuit that transfinites often because of abnormal failure technical matters out of control, improve its safety coefficient in control places such as temperature, pressure, water levels.For the product that the designer's property designed/price ratio of electronic application field such as small household appliances, simple and easy control apparatus is higher is provided convenience.
For achieving the above object, the utility model has adopted following technical scheme:
This control circuit is by operational amplifier or voltage comparator A
1, A
2, A
6For the first module circuit of main part formation with by operational amplifier or voltage comparator A
3, A
4, A
5For second element circuit that main body constitutes is formed.
Its structure is: operational amplifier A
1With diode D
3, resistance R
14, R
15Form trigger flip-flop as the protection control circuit, its output terminal shows output terminal (V as the protection of this unit
E1);
Operational amplifier A
2With resistance R
12, R
16, R
17, R
18, R
19Form Schmidt trigger, as a control circuit that transfinites, its output terminal (V
01) through operational amplifier A
6After the anti-phase driving, as the output terminal (Q of this element circuit
1);
Operational amplifier A
1Inverting input-and operational amplifier A
2Normal phase input end+parallel connection after, as the input end (V of this element circuit
I1), feedback diode D
3Positive pole meets (V
I1) end, negative pole connects and shows output terminal (V
E1);
Operational amplifier A
3And resistance R
26, R
27, R
22, R
18, R
19Form Schmidt trigger, as a control circuit that transfinites, its output terminal (V
z) after diode D4 isolates, the control operational amplifier A
5Anti-phase-input end (V
F);
Operational amplifier A
4With resistance R
24, R
25, R
29Form the very little Schmidt trigger of return difference, as protecting the control supervisory circuit, its output terminal is as the protection control and the demonstration output terminal (V of this element circuit
E2);
Operational amplifier A
3Positive+input end and operational amplifier A
4Anti-phase-input end directly in parallel, as the input end (V of this element circuit
I2);
Resistance R
28With diode D
4Form " low or anti-door " logical relation, operational amplifier A
4When abnormal failure, to operational amplifier A
5Preferential monitoring power is arranged;
Resistance R
24And resistance R
25Dividing point V
pOperational amplifier A is set
4The guarantor control lowest limit current potential, resistance R
29Operational amplifier A is set
4The triggering return difference.
This is an one.
Secondly, operational amplifier A
1Output terminal (V
E1) and operational amplifier A
1Positive+input end feedback directly in parallel, resistance R
14Series resistor R
15Dividing point also with output terminal (V
E1) be connected the other end connection circuit ground end (GND) of resistance R 15, resistance R
14Another termination positive source V
+
Limit control circuit operational amplifier A
2Positive feedback resistor R
16Be serially connected in input end (V
I1) and operational amplifier A
2Output terminal (V
O1) between, resistance R
12Be serially connected in input end (V
I1) and by R
11, N
Tc1And R
10Dividing point (the tV of the potentiometer of forming
I1) between, resistance R
12And resistance R
16The ratio of resistance set operational amplifier A
2The upper and lower bound current potential;
Resistance R
18Crosstalk resistance R
19Dividing point (V
m) be operational amplifier A
2Anti-phase-input end about 1/2V is set
+Reference potential.
The 3rd, operational amplifier A
3Output terminal (V
z) and its positive+input end (V
I2) between, be provided with positive feedback resistor R
26, at input end (V
I2) and dividing point (tV
I2) between string resistance R arranged
22, resistance R
22Crosstalk resistance R
26Intrinsic standoff ratio set operational amplifier A
3The upper and lower bound current potential;
Resistance R
18Crosstalk resistance R
19Dividing point (V
m) be operational amplifier A
3Anti-phase-input end and operational amplifier A
5Positive+input end, about 1/2V is set
+The benchmark job current potential.
Beneficial effect:
Apparent in sum, the utility model occupies obvious technical advantage, and it is also many to produce beneficial effect, has expanded function, has improved performance, has filled up blank, has opened up extensively purposes, simplifies the structure, and has made things convenient for application, has saved resource, has reduced cost.Specifically, the key distinction and technical progress advantage are as follows:
1. the utility model circuit theory novelty is simple in structure, and is different fully with principle, the structure of 555 circuit.
2. the utility model is unique to monitoring (emergency protection control and the demonstration) function of master control (the position control of transfiniting) circuit, has filled up the blank of existing close technology (555 circuit), has solved existing close technology and has hindered and technical matters out of control for some reason.Improve the security performance of using, had important practical value.
3. all functions of the compatible fully existing close technology (555 time base circuit) of master control function of the present utility model.Highly versatile.
4. monitoring function of the present utility model; can directly be used for reset function; need not other ad hoc reset function pin; saved the pin resource; and 555 circuit are exactly ad hoc reset function pin, and its reset function be not be used for protection control with (because of discreteness too big), if the skilful by force usefulness that resets as guarantor's control of borrowing; its performance extreme difference can not be used for product.
5. superior performance of the present utility model is protected control circuit when trigger action, no threshold oscillation phenomenon.
6. product/price ratio of using the utility model design is higher.Be spacing setting, triggering input, malfunction monitoring, pulsed reset, all can finish by shared 1 input end that it is spacing to transfer to other localities, only need change to import resistance in series and get final product owing to circuit.If cancellation protection Presentation Function, each element circuit then can be realized the electric simple form of an input and an output.The beneficial effect of this feature is: the pin resource is saved the limit (8 pin package can be held 3 separate units, and this is that 555 circuit can't be accomplished).Bring greatly easyly to Application Design, client cost is lower, so, higher with the electronic product/price ratio of the utility model design.
Description of drawings
Accompanying drawing is to prevent universal control circuit out of control
In the accompanying drawing: circuit is a substantive part of the present utility model as circuit in the module in the frame of broken lines.The frame of broken lines external circuit is made module peripheral applications circuit.Frame of broken lines boundary inside and outside circuit connection interface (port) as each function pin (port) of modular circuit as V
+And V
-Be respectively the positive source and negative pole pin (the circuit ground end (GND) of modular circuit; All the other function pins (port) are the input and output pin (port) of each unit, will be described in detail below.
Two separate unit circuit are arranged in the accompanying drawing circuit module.Structure and principle are similar, belong to same design.
" A1～A6 " represents 6 simulation integrated operational amplifiers in the accompanying drawing circuit module, also (or) equivalence represent 6 to simulate integrated voltage comparators.Because in this Circuits System, be equivalent with operational amplifier or voltage comparator.
Embodiment
Existing circuit module peripheral applications circuit (overtemperture control) example in conjunction with the accompanying drawings is described in detail below respectively:
First module is applied to temperature control in the accompanying drawing.
Circuit structure:
Circuit in the module is by operational amplifier (or voltage comparator) A
1, A
2, A
6And resistance R
14～R
19, and diode D
3Form.A
1As holding circuit, A
2The control circuit that exceeds, A
6As anti-phase driving output-stage circuit.
The outer application circuit of module is by R
10, R
11, R
12And Ntc1 (negative tempperature coefficient thermistor) composition temperature detection sensing circuit, with input end V
I1Link to each other.Load circuit is simple, directly at modular circuit output terminal V
01The serial connection relay K
1To power supply V
+With (K
1Diode connected in parallel D
1Effect is to eliminate K
1Back-emf during outage).The protection display circuit is also simple, directly at output terminal V
E1Last connection LED1 negative pole is gone here and there R again
13After be connected to power supply V
+
The first module circuit connecting mode, as shown in drawings:
Ntc1 one terminating resistor R
10, R
10The other end and power cathode V
-(circuit ground end GND) is connected, Ntc1 other end series resistor R
11, R
11The other end and positive source V
+Link to each other.Potential change reflection temperature variation.Resistance R
12Be serially connected with V
I1With tV
I1Between.Resistance R
16Be A
2Positive feedback resistor, be connected to V
I1With V
O1Between, resistance R
12With R
16Intrinsic standoff ratio (ratio of resistance) set A
2The upper and lower bound current potential.Resistance R
17Be A
2Pull-up resistor (so A
2Both available operational amplifier, also the voltage available comparer replaces).A
2Output terminal (V
O1) direct and A
6Anti-phase (-) input end link to each other A
6Output terminal Q
1Directly connect relay K
1With diode D
1Anodal.Resistance R
18String R
19Back cross-over connection is in both ends of power, R
18, R
19Tie point (dividing point Vm) is A
2Anti-phase (-) input end and A
6Positive (+) input end provides the required reference voltage of operate as normal (about 1/2V
+).
Resistance R
14And R
15Series connection, R
14Another termination positive source V
+, R
15Other end ground connection (GND) R
14String R
15Dividing point (V
E1) be A
1Positive (+) input end provide protection lowest limit current potential (to be slightly less than V
+).A
1Positive (+) input end and A
1Output terminal directly be connected, tie point shows output terminal (V as protection
E1), V
E1Sending and receiving optical diode LED1 negative pole, LED1 positive pole are through current-limiting resistance R
13After meet positive source (V
+).Diode D
3Positive pole meets V
I1, D
3Negative pole meets V
E1
Circuit theory:
At the beginning of circuit powered on, Ntc1 resistance when low temperature was bigger, though with tV
I1And V
I1The current potential lifting is very high.Exceed A
2The lower limit current potential, but still be lower than V
E1Current potential is because of resistance R
15String R
14The dividing point current potential high (near V
+), make V
E1＞V
I1So,, protect control circuit A
1Output terminal V
E1The output noble potential is again through direct positive feedback effect, A
1By the noble potential self-locking, be in a kind of steady state (SS) (promptly performing garrison duty state), because D
3Buffer action, V
E1Noble potential is to A
2Do not play trigger action, at this moment load circuit is fully by A
2Transfinite position control of do.
From the above, after powering on, tV
I1Current potential is higher, exceeds A
2The lower limit current potential makes V
I1＞Vm (about 1/2V
+), A
2Be triggered V
O1Place noble potential, through A
6After the anti-phase driving, Q
1The output electronegative potential directly drives relay K
1The coil electricity adhesive is connected the heating element power supply and is heated up, and rises with temperature, and the Ntc1 resistance diminishes, tV
I1And V
I1Current potential reduces, and works as tV
I1After current potential decline exceeds the upper limit, V
I1During＜Vm, A
2Trigger upset, V
O1The output electronegative potential is through A
6After anti-phase, Q exports noble potential, relay K
1(back-emf is by D for coil blackout
1Eliminate) discharge, turn-off the heating element power supply, begin cooling.Ntc1 is big more with temperature decline resistance, tV
I1And V
I1Current potential is raised again, works as tV
I1Current potential exceeds down in limited time, V
I1＞Vm, A
2The upset that is triggered again, V
O1Export noble potential again, through A
6Anti-phase, Q
1The output electronegative potential, relay K
1The adhesive of switching on again, heating element are switched on again to heating up and are entered next circulation.In the cyclic process, protect control circuit A
1Output terminal V
E1Be always noble potential, be in the garrison state.
When temperature detection (sensing) circuit abnormal fault (is opened a way or R as Ntc1
11Short circuit or R
12Open circuit or V
I1Unsettled) time, tV
I1Current potential is high, V
I1Current potential is higher than V
E1, protect control circuit A
1Be triggered V
E1The output electronegative potential, it is luminous to protect apparent circuit LED1 luminotron, shows by the garrison state to transfer guarantor's control state, V to
E1Electronegative potential is through diode D
3Feed back to V
I1End makes high fault-signal at R
12Going up anti-phase is electronegative potential, V
I1＜Vm, A
2Be forced to trigger, make V to guard mode
O1The output electronegative potential is through A
6Anti-phase, Q
1The output noble potential, relay K
1Outage, K
1The contact is decontroled, and turn-offs the heating element power supply and stops heating, guarantees safety.Illustrate, when fault, protect control circuit A
1To limit control circuit A
2And anti-phase driving circuit A
6Preferential control (monitoring function is arranged) is arranged.As seen, if not protection control, A
2And A
6Out of control when abnormal failure, still allow heating element continue long-term heating power.
Protect control circuit A
1Return difference is very big, near power supply V
+And V
-So,, first module is protected control circuit A
1Belong to the bistable state self-locking type.A
1After entering guarantor's control state, need outage to fix a breakdown, when powering on, circuit just can return the garrison state again.If under powering-off state not, after fixing a breakdown, need at V
I1End input negative pulse is protected control circuit A
1Just can return the garrison state.
The I/O characteristic and the logical relation of first module circuit see its truth table (table 1) for details.
Second element circuit is applied to temperature control.
Circuit constitutes:
Circuit in the module: by operational amplifier (or voltage comparator) A
3, A
4, A
5And resistance R
24～R
29And diode D
4Form.A
3As limit control circuit, A
4As protecting control circuit, A
5As anti-phase driving output-stage circuit.
The outer application circuit of module: by negative tempperature coefficient thermistor Ntc2 series connection fixed value resistance R
20, R
21Form temperature sensing circuit, through resistance in series R
22With V
I1Link to each other, by LED
2String R
23Form the protection display circuit, load circuit is directly by relay K
2Parallel diode D
2Form.
The second element circuit connected mode is as A in the accompanying drawing circuit
3, A
4, A
5Shown in system (unit) circuit of main part: N
Tc2One end is through resistance in series R
21After meet positive source (V
+), N
Tc2The other end is through resistance in series R
20Meet power cathode V
-(circuit ground end GND), Ntc and R
21Tie point (tV
I2) be exactly temperature variant potential point, resistance R
22Be serially connected in tV
I2With this element circuit input end V
I2Between, resistance R
26Be A
3Positive feedback resistor, R
27As A
3Pull-up resistor be serially connected in A
3Output terminal V
zWith positive source V
+Between (so A
3Both available operational amplifier also can wait with voltage ratio to replace).Diode D
4Negative pole meet V
z, positive pole meets A
5Anti-phase (-) input end (V
F), R
28Be serially connected with V
FAnd A
4Output terminal V
E2Between, R
29Be A
4Positive feedback resistor, A
4Positive (+) input end (Vp) be connected with R
24, R
25And R
29, R
24Another termination positive source (V
+), R
25Another termination power cathode V
-(circuit ground end GND).LED
2Anodal serial connection R
23Be connected to positive source (V behind the resistance
+), LED
2Negative pole meets V
E2Rp-drive A
5Output terminal Q
2Succeed electrical equipment K
2, with K
2Diode connected in parallel D
2Positive pole meets Q
2, D
2Negative pole meets positive source V
+, D
2Be used to eliminate K
2Back-emf during relay.
A
5Positive (+) input end and A
3Anti-phase (-) input end link to each other, by resistance R
18String R
19Dividing point Vm provide about 1/2V for it
+Benchmark job voltage.
A
3Positive (+) input end and A
4Anti-phase (-) input end all be connected to this unit input end V
I2
Positive feedback resistor R
26With resistance R
22The ratio of resistance, set A
3Upper limit current potential and lower limit current potential.
Positive feedback resistor R
29And R
24, R
25The ratio of resistance set A
4The triggering lowest limit and return difference.
Resistance R
28With diode D
4Just form and door (negative or door) logical relation.
Circuit theory:
At the beginning of circuit powers on, N
TcResistance is bigger during low temperature, though with tV
IiAnd V
I2The current potential lifting is very high, but still is lower than A
4The lowest limit (Vp) current potential, i.e. Vp＞V
I2So, protect control circuit A
4Output terminal (V
E2) the output noble potential, LED
2Not luminous, illustrate that circuit is in garrison state, V
E2Noble potential passes through resistance R
28Input to V
FEnd is A
5The operating potential condition of anti-phase triggering is provided.
After powering on, tV
I2Current potential is higher, exceeds A
3The lower limit current potential, make V
I2＞Vm (approximates 1/2V
+), A
3Be triggered, with V
zEnd places noble potential, because diode D
4With resistance R
28Just form and gate logic relation, V
zWith V
E2When being noble potential simultaneously, V
FBe noble potential, V
F＞Vm, A
5Reversed-phase output Q
2Be electronegative potential, make relay K
2The coil electricity adhesive, K
2Contacting heating element power supply begins to heat up.
Rise N with temperature
Tc2Resistance diminishes, tV
I2And V
I2Current potential descends, and works as tV
I2Current potential drops to when exceeding upper limit current potential, V
I2＜V
mA
3The upset that is triggered, V
zBe electronegative potential, through D
4Negative or effect, V
FAlso be electronegative potential, V
F＜V
mA
5Reversed-phase output Q
2Be noble potential, make relay K
2(back-emf during outage is by D for coil blackout
2Eliminate), the contact discharges, and turn-offs the heating element power supply, begins cooling, N
Tc2Descend with temperature, it is big that resistance becomes, tV
I2And V
I2Current potential is raised again, works as tV
I2Current potential exceeds down in limited time, V
I2Current potential is greater than V
m, A
3Be triggered V again
zThe output noble potential, V
FBe noble potential also, through A
5Anti-phase, Q
2Export electronegative potential again, make relay K again
2The heating element power supply is connected in the coil electricity adhesive, begins to heat up, and circuit enters next working cycle.In the normal circulation process, protect control circuit A
4Be in garrison state (V eventually
E2Be noble potential).
When temperature sensing circuit generation abnormal failure (as N
Tc2Disconnect, or R
21Short circuit, or R
22Open circuit, or V
I2Unsettled) time, tV
I2Current potential is high, V
I2＞Vp, A
4Be triggered upset for protecting control state, V
E2The output electronegative potential makes LED
2By galvanoluminescence, show fault, simultaneously V
E2Electronegative potential is through resistance R
28With V
FThe point current potential also drags down (because of A
5Input impedance is very big, R
28Last pressure drop is very small), make V
m＞V
F, A
5Reversed-phase output Q
2Be noble potential, relay K
2The heating element power supply is turn-offed in outage, guarantees safety.If as seen there is not A
4And R
28Guarantor's control effect, A
3And A
5Out of control when abnormal failure, can still allow heating element continue long-term heating power.
Under powering-off state not, after fault is got rid of, V
I2＜Vp, A
4Automatically return to the garrison state by protecting the control state, this is the difference with the first module circuit.
The I/O characteristic and the logical relation of second element circuit see its truth table (table 2) for details.
First module circuit logic truth table
Table 1
The second element circuit logic true value table
Table 2
| tV i2Current potential | V i2Current potential | V ZCurrent potential | V FCurrent potential | Q 2Current potential | V e2Current potential |
| Noble potential H exceeds lower limit but is lower than lowest limit Vp (Vp is slightly less than V +) | V i2＞V m V i2＜V e2 V m≈1/2V + | Noble potential H | Noble potential H | Electronegative potential L | Noble potential H performs garrison duty state |
| Current potential drops between the lower limit and the upper limit | V i2＞V m V m≈1/2V + | H keeps ortho states | H keeps ortho states | L keeps ortho states | H performs garrison duty state |
| Under be reduced to and exceed the upper limit | V i2＜V m | Electronegative potential L | Electronegative potential L | Noble potential H | Garrison state H |
| Go up between the upper limit and the lower limit | V i2＜V m | L keeps ortho states | L keeps ortho states | H keeps ortho states | H performs garrison duty state |
| Rising exceeds lower limit but is lower than Vp | V i2＞V m | Noble potential H | Noble potential H | Electronegative potential L | Garrison state H |
| Abnormal failure current potential ≈ V + | V i2≈V +＞Vp protects the control state | Noble potential H | Electronegative potential L | Noble potential H protects the control state | Electronegative potential L protects the control state |
| Fault disappearance current potential exceeds lower limit but is lower than lowest limit Vp (Vp is slightly less than V +) | V i2＞V m V i2＜Vp returns the garrison state | Noble potential H | High voltage H | Electronegative potential L returns the garrison state automatically | Noble potential H returns the garrison state automatically |
Claims (3)
1, a kind ofly prevent universal control circuit out of control, it is by operational amplifier or voltage comparator A
1, A
2, A
6For the first module circuit of main part formation with by operational amplifier or voltage comparator A
3, A
4, A
5Form for second element circuit that main body constitutes, it is characterized in that:
(1) operational amplifier A
1With diode D
3, resistance R
14, R
15Form trigger flip-flop as the protection control circuit, its output terminal shows output terminal (V as the protection of this unit
E1);
(2) operational amplifier A
2With resistance R
12, R
16, R
17, R
18, R
19Form Schmidt trigger, as a control circuit that transfinites, its output terminal (V
01) through operational amplifier A
6After the anti-phase driving, as the output terminal (Q of this element circuit
1);
(3) operational amplifier A
1Inverting input-and operational amplifier A
2Normal phase input end+parallel connection after, as the input end (V of this element circuit
I1), feedback diode D
3Positive pole meets (V
I1) end, negative pole connects and shows output terminal (V
E1);
(4) operational amplifier A
3And resistance R
26, R
27, R
22, R
18, R
19Form Schmidt trigger, as a control circuit that transfinites, its output terminal (V
z) after diode D4 isolates, the control operational amplifier A
5Anti-phase-input end (V
F);
(5) operational amplifier A
4With resistance R
24, R
25, R
29Form the very little Schmidt trigger of return difference, as protecting the control supervisory circuit, its output terminal is as the protection control and the demonstration output terminal (V of this element circuit
E2);
(6) operational amplifier A
3Positive+input end and operational amplifier A
4Anti-phase-input end directly in parallel, as the input end (V of this element circuit
I2);
(7) resistance R
28With diode D
4Form " low or anti-door " logical relation, operational amplifier A
4When abnormal failure, to operational amplifier A
5Preferential monitoring power is arranged;
(8) resistance R
24And resistance R
25Dividing point V
pOperational amplifier A is set
4The guarantor control lowest limit current potential, resistance R
29Operational amplifier A is set
4The triggering return difference.
2, according to claim 1ly prevent universal control circuit out of control, it is characterized in that:
(1) operational amplifier A
1Output terminal (V
E1) and operational amplifier A
1Positive+input end feedback directly in parallel, resistance R
14Series resistor R
15Dividing point also with output terminal (V
E1) be connected resistance R
15Other end connection circuit ground end (GND), resistance R
14Another termination positive source V
+
(2) limit control circuit operational amplifier A
2Positive feedback resistor R
16Be serially connected in input end (V
I1) and operational amplifier A
2Output terminal (V
O1) between, resistance R
12Be serially connected in input end (V
I1) and by R
11, N
Tc1And R
10Dividing point (the tV of the potentiometer of forming
I1) between, resistance R
12And resistance R
16The ratio of resistance set operational amplifier A
2The upper and lower bound current potential;
(3) resistance R
18Crosstalk resistance R
19Dividing point (V
m) be operational amplifier A
2Anti-phase-input end about 1/2V is set
+Reference potential.
3, according to claim 1ly prevent universal control circuit out of control, it is characterized in that:
(1) operational amplifier A
3Output terminal (V
z) and its positive+input end (V
I2) between, be provided with positive feedback resistor R
26, at input end (V
I2) and dividing point (tV
I2) between string resistance R arranged
22, resistance R
22Crosstalk resistance R
26Intrinsic standoff ratio set operational amplifier A
3The upper and lower bound current potential;
(2) resistance R
18Crosstalk resistance R
19Dividing point (V
m) be operational amplifier A
3Anti-phase-input end and operational amplifier A
5Positive+input end, about 1/2V is set
+The benchmark job current potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008200956956U CN201413482Y (en) | 2008-07-22 | 2008-07-22 | Runaway state prevention general-purpose control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008200956956U CN201413482Y (en) | 2008-07-22 | 2008-07-22 | Runaway state prevention general-purpose control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201413482Y true CN201413482Y (en) | 2010-02-24 |
Family
ID=41715364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008200956956U Expired - Fee Related CN201413482Y (en) | 2008-07-22 | 2008-07-22 | Runaway state prevention general-purpose control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201413482Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157917A (en) * | 2010-06-01 | 2011-08-17 | 刘圣平 | Lower-than-lower-limit reverse control time base circuit |
| TWI579665B (en) * | 2015-03-26 | 2017-04-21 | Azbil Corp | Control device and control method |
-
2008
- 2008-07-22 CN CN2008200956956U patent/CN201413482Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157917A (en) * | 2010-06-01 | 2011-08-17 | 刘圣平 | Lower-than-lower-limit reverse control time base circuit |
| TWI579665B (en) * | 2015-03-26 | 2017-04-21 | Azbil Corp | Control device and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201674209U (en) | Bottom-cross, reverse-control and time-base circuit | |
| CN103065588B (en) | Light-emitting diode (LED) backlight drive circuit and liquid crystal display device | |
| CN201413482Y (en) | Runaway state prevention general-purpose control circuit | |
| CN204131459U (en) | Solar shading circuit | |
| CN101656527B (en) | Three-limit time-base circuit | |
| CN209001916U (en) | A kind of automobile controller power cut off delay control circuit | |
| CN102843049B (en) | Rectifier voltage regulator for motorcycles | |
| CN202026078U (en) | Protective circuit of switching power supply | |
| CN201369550Y (en) | Or-separation protective type limit-exceeding control circuit | |
| CN104330992B (en) | Electric appliance when the rebasing peace that binds controls circuit and its safety temperature control control | |
| CN203366023U (en) | AC control switch device and intelligent control system | |
| CN102111137A (en) | Safe control time-base circuit | |
| CN209233749U (en) | Driver current-limited startup circuit for DC power-supply system | |
| CN102237671A (en) | Comprehensive out-of-limit and out-of-control prevention potential limiting counting timing control circuit | |
| CN202334470U (en) | Delay circuit and switch power supply controller with same | |
| CN103107718B (en) | Control circuit of energy discharging of large magnetic moment magnetorquer | |
| CN201518106U (en) | Excessive temperature control circuit for preventing control losing | |
| CN201477397U (en) | General control circuit for preventing runaway in whole course | |
| CN201994627U (en) | Control circuit with multifunctional power-control chip pin and detecting circuit | |
| CN204302679U (en) | Bind rebasing peace control circuit and safety temperature control control thereof time electrical equipment | |
| CN201838974U (en) | Minimum-guaranteed temperature controlling or timing circuit | |
| CN208060982U (en) | A kind of switching value output circuit | |
| CN202586275U (en) | Comprehensive anti-super runaway position-restricted counting timing control circuit | |
| CN201522624U (en) | Inverse different dimension routine multi-range control circuit | |
| CN203968094U (en) | Energy-saving safe switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI CHAOHAO ELECTRONIC ENGINEERING TECHNOLOGY Free format text: FORMER OWNER: LIU SHAOHUA Effective date: 20131210 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 435400 HUANGGANG, HUBEI PROVINCE TO: 201801 JIADING, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131210 Address after: Peng Feng Road Jiading District 201801 Malu Town, Shanghai City No. 15 building 3 floor 1 Patentee after: Shanghai super Hao Electronic Engineering Technology Co., Ltd. Address before: 435400 Wuxue city in Hubei Province town Ma pumping station Patentee before: Liu Shaohua |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20150722 |
|
| EXPY | Termination of patent right or utility model |