CN2202937Y

CN2202937Y - High integration quick response ac voltage stabilizer

Info

Publication number: CN2202937Y
Application number: CN 94227710
Authority: CN
Inventors: 单觉初
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-16
Filing date: 1994-02-07
Publication date: 1995-07-05
Anticipated expiration: 2004-02-07

Abstract

The utility model relates to an automatic AC voltage stabilizer. A control part adopts a specific-application integrated circuit with deviation display for linear voltages. The multi-stage floating-point output ends of reaction input voltages are connected with relay coils and auxiliary normal-open contacts. Therefore, a control circuit with stagnant character is formed, and takes gradation voltages as return difference. The utility model has high integration level and rapid response. The utility model thoroughly solves the judder problem which harms relay contracts. When the utility model meets voltage stabilizing accuracy, the utility model reduces switch times up to the hilt, and prolongs service life. The utility model is matched with fixed output-regulation inputs. A main-loop scheme that a transformer automatically quits when input voltages are normal has obvious power-saving effect.

Description

High integration quick response ac voltage stabilizer

The utility model belongs to a kind of automatic AC voltage stabilizer.

Because economy develops rapidly and the hysteresis of power construction, the many regional power supply anxieties of China, voltage instability, very strong sales of family expenses automatic voltage regulator on the market, existing goods voltage stabilizer such as electronics are reported total No. 624 visitor's sound DBB-4-1000 type, usually adopt the four high guaily unit integrated circuit, ubiquitous weak point is as follows:

1. response speed is slow, for avoiding the relay tip shake in input voltage transient fluctuation and the handoff procedure, bigger time constant is got in the voltage sample loop, and in relay two termination capacitors, this greatly reduces response speed, and response speed can prolong the domestic air conditioning starting time slowly, forms " creeping " effect, even causes starting difficulty.

2. self stability is poor.The line voltage distribution fluctuation can cause the relay frequent movement, causes illumination flicker and tedious noise, and is totally unfavorable to tame electric life.Act frequently, the relay tip shake that particularly may occur in the handoff procedure will cause the voltage stabilizer self-inflicted injury, and serviceable life is generally shorter.

3. the element many (26) of correctness is switched in influence, adjusts point many (finely tuning 4), a certain fine setting often takes place change and cisco unity malfunction a little, and whole aircraft reliability is poor.

The performance quality of family expenses AC stabilizer, be directly connected to huge numbers of families' household electrical appliances safety, the requirement of its " cost performance " is more much higher than industrial, along with the power household electrical appliances, the popularizing day by day of domestic air conditioning particularly, deficiency on the existing product performance is more outstanding, and it is very urgent to develop a kind of new high-performance family expenses AC stabilizer.

The purpose of this utility model provides a kind of highly reliable, long-life, fast-response, energy-saving AC voltage regulator.

The utility model is to realize like this, in the automatic AC voltage stabilizer that the voltage adjustment member of being made up of a group relay contact of autotransformer and conversion autotransformer tap 1 and control section 2 are formed, control section 2 adopts the linear voltage deviation to show special IC, the multi-stage floating-point output terminal of its reflection input voltage is one group from hanging down paramount with three, every group drives a relay, every group of intermediate ends directly succeeded electric apparatus coil, wiring circle again behind the auxiliary normally open contact of all the other two end series relay, overlapping between adjacent two groups, overlapping ends is forward serial connection diode separately.

When making certain group output intermediate ends, input voltage gets the adhesive of electric then relay, if input voltage fell after rise and made the intermediate ends dead electricity this moment, then because " self-insurance " effect relay of the auxiliary normal opened contact of adjacent output keeps adhesive, have only that this relay just discharges when the output dead electricity that falls after rise to adjacent lower end, thus the hysteresis control characteristic that to realize with a level potential difference be return difference.The adhesive of each group relay all is that intermediate ends gets under the electric situation in the circuit, " self-insurance " effect once the adhesive auxiliary contact, make relay enter stable status automatically, the release of each group relay all takes place through auxiliary normally open contact " self-insurance " branch road under intermediate ends dead electricity situation, it is very clear-cut to disconnect, thereby has thoroughly eliminated contingent contact bounce the transfer process from line construction.

Above-mentioned control circuit can be realized correctly and fast conversion between the relay, and has only a relay adhesive any time.The correspondent voltage adjustment member can adopt fixing output, adjusts input, and input voltage is the energy-saving scheme that withdraws from automatically of autotransformer just often, also can add the multi-stage floating-point light-emitting diode display that reflects input voltage easily.

Performance of the present utility model describes with reference to the following drawings by an example.

Block scheme is seen accompanying drawing 1, and line principle is seen accompanying drawing 2, and accompanying drawing 3 is seen in stabilizing voltage characteristic and actuating of relay interval.

This device mainly is made up of voltage adjustment member 1 and control section 2.Mainly contain relay commutation circuit 11 and main-transformer 12 in the voltage adjustment member 1.Control circuit 2 mainly contains line voltage distribution sampling circuit 21, benchmark, comparator circuit 22, and driving amplifier 23, hysteretic characteristic forms loop 24, light-emitting diode display 25 and low-voltage power supply loop 26.

Voltage adjustment member 1 adopts fixing output to adjust input, and input voltage is the energy-saving scheme that withdraws from automatically of main-transformer just often.Main-transformer 12 is an autotransformer 81 among the figure.There are 5 grades of taps to be denoted as (2)～(6) to height from low.Relay commutation circuit 11 is made up of 5 relays 71～75.71 double-throw contact link input phase line.71～73 normally opened contact connects 81 taps (2)～(4) ends respectively, and the normally closed contact that 71,72 normally closed contacts connect 72,73 double-throw contact 73 respectively connects 75 double-throw contact.75 normally closed contact connects transformer 81 taps (5) and leads tap.75 normally opened contact meets 81(6) end.74 normally closed contacts and transfer contact connect 81 (1) end and circuit zero line N end respectively.

Control section 2 adopts integrated circuit 3914 to measure input voltage, and migrates to 10 grades of switching values outputs of high pressure range do.It is the fast-response control section of the hysteretic characteristic of return difference that its floating-point output and the auxiliary normal opened contact of relay are formed with the level potential difference.

Control section 2 mesolow current supply circuits 26 are provided with independently small transformers 82.Benchmark, comparator circuit 22 are made up of deviation from linearity indication special IC 3914 and peripheral circuit line.Establish reference voltage source in 3914,10 grades of comparers, its 10 grades of voltage dividers float can be connected into suitable voltage range.There is control types to select, this device adopts the floating-point way of output, the line voltage distribution sampling is finished by 21, import by 3914 the 5th pin, 3914 effective voltage input ranges of being determined by resistance 42,43, potentiometer 31,32 are divided into 10 voltage ranges, carry out floating-point by 10 light-emitting diode displays 25 and show, the one group of triode 23 through correspondence drives relay 11 simultaneously, switches the purpose that autotransformer 81 taps reach regulated output voltage.It is the hysteretic characteristic formation loop 24 of return difference that its 3914 floating-point output and the auxiliary normal opened contact of relay are connected into the level potential difference.Its concrete wiring is: the reflection input voltage of 3914 outputs is from hanging down paramount 10 output terminals (1) to (10), with three is one group, overlapping between adjacent two groups (as first group (1), (2), (3), second group (3), (4), (5)) totally 5 groups, drive relay 71～75 respectively.Its connection is: every group of intermediate ends (even numbers) directly succeeded electrical equipment, coil, wiring circle again behind the auxiliary normally open contact of all the other two ends (odd number) series relay.Wherein connect coil separately behind overlapping ends (3), (5), (7), (9) forward serial connection diode.

It is example that this circuit hysteretic characteristic forms with relay 72, is described as follows:

When the rising of circuit input voltage was lighted LED63,71 auxiliary normal opened contacts " self-insurance " kept adhesives, and 72 do not inhale.Have only when input voltage continues rising LED64 and light, be converted to 72 adhesives when LED63 extinguishes, 71 discharge, and input voltage is from autotransformer 81(2) shelves switch to (3) shelves.Fall the end and to LED64 extinguish if input voltage falls after rise this moment, and LED63 lights, because the existence 72 of auxiliary normally open contact can not discharge.Have only input voltage to reduce to LED63 and extinguish, 62 when lighting, and just is converted to 71 adhesives, and 72 discharge, thereby realize that its return difference is the hysteretic characteristic of 1 voltage range.

As can be seen from Figure 2 adjacent three output terminals of driving amplifier 23 are controlled a relay jointly, its intermediate ends gets after the electric adhesive because " self-insurance " of auxiliary contact effect, and the 23 output terminal inter-stage saltus steps that reasons such as line voltage distribution transient fluctuation cause are had no effect to it.In addition, no matter the rising of input voltage and decline cause that it all is under the situation of intermediate ends no-output that relay discharges, " self-insurance " branch road through assisting normally open contact takes place, thereby disconnection is very clear-cut.The present invention has thoroughly eliminated contingent contact bounce the transfer process from line construction.Accompanying drawing 3 is seen in stabilizing voltage characteristic and actuating of relay interval, and as can be seen, this circuit switching electrical equipment just enters stable status automatically once switching, thereby has significantly reduced action frequency, has prolonged serviceable life.

Enforcement of the present utility model is the following advantage of tool compared with prior art:

1. integrated circuit 3914 accuracy of detection height, peripheral cell is few, being used for stable-pressure device has distinct advantages, has publication once to deliver with 3914 circuit such as electronics and reports total No. 385 " controlling automatic voltage regulator with display driver circuit " etc., but all be with 3914 direct pilot relay of output or thyristors.Its defective is the saltus step that the input voltage transient fluctuation can cause output, can cause the autotransformer partial short-circuit during two LED lighted simultaneously when adjacent two gears were changed.Thereby the commodity selling of existing market still useless 3914.The utility model has solved the problems referred to above with simple structure, thoroughly solve contact bounce and reduced action frequency to greatest extent, avoided common voltage stabilizer to make the unstable common fault of voltage stabilizing output once changing frequent movement, prolonged serviceable life greatly, improved reliability at input voltage.

2. the connection of the utility model major loop is under the control circuit power failure state, and input and output are straight-through, and the moment of starting shooting does not have impact.Most machines can not produce surpressure by fault, and security is good.When input voltage was lower than usable range, control section withdrawed from automatically, and output is straight-through, and this unlikelyly causes fully that outage has Practical significance when the home bus voltage regulation way.

3. whether input voltage floating-point Presentation Function of the present utility model makes the user normally come into plain view to voltage stabilizer work, and is easy in time find to adjust not normal some gradual failures that wait of point.

4. this device energy-conservation mainly contains following measure and finishes and be better than existing product:

(1) fixed secondary is adjusted elementary autotransformer and is located optimal operational condition always.

(2) input voltage just often, autotransformer withdraws from, open circuit loss is zero.

(3) have only 1 relay adhesive any time, the control circuit loss is very little.

In sum, the utility model advantages such as structure is simple, safe and reliable, fast energy-saving of signing an undertaking, the ratio of performance to price that tool is very high, the more powerful home bus stable-pressure device of the most suitable work.

Claims

1, a kind of automatic ac voltage stabilizer, form by voltage adjustment member 1 and control section 2 that a group relay contact of autotransformer and the tap of conversion autotransformer is formed, it is characterized in that: control section 2 adopts the linear voltage deviation to show special IC, the multi-stage floating-point output terminal of its reflection input voltage is one group from hanging down paramount with three, every group drives a relay, each group intermediate ends is directly succeeded electric apparatus coil, wiring circle again behind the auxiliary normally open contact of all the other two end series relay, overlapping between adjacent two groups, overlapping ends is forward serial connection diode separately.

2, the voltage stabilizer of claim 1 regulation, it is characterized in that: in the control section 2, the linear voltage deviation shows that special IC 3914 amplifies through one group of transistor 23, the reflection input voltage is one group from low paramount 10 output terminals (1)～(10) with three, overlapping between adjacent two groups (as first group (1), (2), (3) the 2nd groups (3), (4), (5)) totally 5 groups drive relay 71～75 respectively, its connection is: every group of intermediate ends (even numbers) directly succeeded electric apparatus coil, wiring circle, wherein overlapping ends (3) again behind the auxiliary normally open contact of all the other two ends (odd number) series relay, (5), (7), (9) connect line chart separately behind the forward serial connection diode.