CN1003144B - Voltage adaptive power circuit - Google Patents
Voltage adaptive power circuit Download PDFInfo
- Publication number
- CN1003144B CN1003144B CN87100634.0A CN87100634A CN1003144B CN 1003144 B CN1003144 B CN 1003144B CN 87100634 A CN87100634 A CN 87100634A CN 1003144 B CN1003144 B CN 1003144B
- Authority
- CN
- China
- Prior art keywords
- voltage
- stable
- fairing
- pressure device
- 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
Links
Images
Landscapes
- Control Of Electrical Variables (AREA)
- Rectifiers (AREA)
Abstract
The present invention relates to a voltage self-adaptive power circuit which comprises a rectifying device of high voltage, a rectifying device of low voltage and a voltage stabilizer, wherein the input end of the voltage stabilizer is connected with the rectifying device of high voltage, and the output end is connected with the rectifying device of low voltage and a filter capacitor, and supplies power to the outside. When AC voltage is lowered, and the voltage of the output end of the voltage stabilizer is lower than the voltage stabilization value of the voltage stabilizer, the voltage stabilizer is put into service for supplementing high rectifying voltage to the output end in an intermittent pulse mode and ensuring output stability. The circuit can suit the fluctuation of AC voltage in a large range, and can also be used for automatically switching the supply of 110V AC electricity and 220V AC electricity.
Description
The invention relates to the power circuit that obtains the complete electronic set of direct current supply from alternating current.
A lot of areas, particularly with the vast rural area of small hydropower station power supply, alternating voltage is everlasting, and 130v～240v scope is interior to fluctuate, and this makes quite a few use the complete electronic set of prior art, and for example black and white television set can not adapt to.In addition, the employed alternating voltage difference in countries in the world has the area of dual-purpose 110v and 220v, only also has with the area of 110v or 220v, and this wishes that also power circuit can adapt to these voltage automatically.
The prior art in this field described in 1984 the 10th phases of electronic technology " new television models D.C. regulated power supply " literary composition.In the prior art, changing type switching regulator D.C. regulated power supply (common name high-voltage switch power supply) has adaptability preferably to variation of AC voltage.But its cost height, technical difficulty be big, to the technical requirement height of element, can not be accepted by the complete electronic set of cheapness such as black and white television set.
Chinese patent prospectus (85103811) discloses an invention of Japanese multiple general company, this invention is gone to differentiate the height of alternating voltage with circuit kit and is changed rectification circuit automatically, make VD keep certain, thereby can adapt to the alternating voltage of 110v or 220v automatically.This essence of an invention is that voltage carries out two grades of conversions automatically, therefore can not adapt to the continuous variation of alternating voltage wide fluctuations.If alternating voltage changes between 110v～220v, VD is about transfer point in one segment limit so, be not too high be exactly low (consulting this disclosure of the Invention Figure of description 7), make the load cisco unity malfunction, even manage to make load to work, also can make power consumption excessive.In addition, the sudden change of output dc voltage conversion can produce disagreeable phenomenon as make television image sudden enlargement, dwindle or shake.On the other hand, this invention complex circuit uses element more, is unfavorable for reducing cost.
The power circuit of other type also is difficult under the technical conditions of low-cost and regulation possesses wide voltage adaptation scope.
Task of the present invention is to provide the alternating voltage that can adapt to automatically that a kind of circuit is simple, cost is low, low in energy consumption to change continuously on a large scale, also can realize the power circuit of the automatic conversion of 110v and 220v voltage.
Task of the present invention is finished as follows: having between two cover fairings of two kinds of voltages of height, insert a stable-pressure device.When alternating voltage was higher, stable-pressure device was cut off, so do not work; When the alternating voltage reduction made the stable-pressure device output end voltage be lower than its voltage stabilizing value, stable-pressure device work added to output terminal in the interrupting pulse mode with higher commutating voltage, thereby had realized that output is stable.
According to principle of the present invention, can design and produce the voltage adaptive integrated regulator.
Below with reference to accompanying drawing, invention is explained in detail.
Fig. 1 is a kind of television power circuit schematic diagram of prior art.
Fig. 2 A is the schematic diagram that the present invention uses in TV set power.
Fig. 2 B is the circuit diagram of an example using in TV set power of the present invention.
Fig. 2 C is the present invention another embodiment in TV set power.
Fig. 3 A, 3B, 3C and Fig. 4 A, 4B, 4C all are figure of key diagram 2A duty.
Fig. 5 is the integrated regulator theory diagram that manufactures and designs with the present invention.
Fig. 1 is the television power circuit schematic diagram of prior art.In Fig. 1, owing to the fixed proportion relation of primary and secondary of transformer (1), the sound accompaniment voltage V of fairing (2) output
SAnd the proportionate relationship that also is maintained fixed between alternating voltage, when alternating voltage descends, sound accompaniment voltage v
sAlso descend usually, when the Aiternating Current Voltage Ratio ratings descends 20% left and right sides, sound accompaniment voltage V
SJust drop to and make stable-pressure device (4) cisco unity malfunction, the output voltage v of stable-pressure device (4)
oUnstable.
Fig. 2 A is the schematic diagram that the present invention uses in TV set power.It has a transformer (1) that two kinds of commutating voltage windings can be provided at least, has increased fairing (5) and a stable-pressure device (13) that voltage stabilizing value than the voltage stabilizing value of stable-pressure device (4) high higher than fairing (2) output voltage on the power supply of this external prior art.There is a common port (9) fairing (2), (5), the output terminal (11) of the input termination fairing (5) of stable-pressure device (13), the output terminal (10) of the output termination fairing (2) of stable-pressure device (13), the common port of stable-pressure device (13) links to each other with aforementioned common port (9).The output terminal (11) of fairing (5) do not connect filter capacitor filtering or only access capacity less than half low capacity electric capacity of filter capacitor (3) capacity eliminate to disturb.Stable-pressure device (13) also can be made reference voltage by external stabilization voltage.
As mentioned above, owing to constituted voltage adaptive power circuit, basic variation has taken place in this duty that just makes circuit compared with prior art, can make power supply to the accommodation of voltage broadening significantly, and power consumption is significantly reduced.
Below in conjunction with Fig. 2 A, Fig. 3 and Fig. 4 duty of the present invention is described.
In Fig. 3 A and Fig. 3 B, v is the voltage stabilizing value of stable-pressure device (13), and it is greater than the voltage stabilizing value v of stable-pressure device (4)
0; v
10The voltage that contact among the presentation graphs 2A (10) is located (and the sound accompaniment voltage v that is attached thereto
s), it is the DC voltage that has ripple; The equal express time of all horizontal ordinate t among Fig. 3; All horizontal ordinate v among Fig. 4 all represent alternating voltage.
When alternating voltage is higher, the v in Fig. 4 A for example
1The time, fairing (2) is exported than higher voltage, at this moment the voltage waveform of contact (10) such as the v among Fig. 3 A
10, be higher than the voltage stabilizing value v of stable-pressure device (13)
13, stable-pressure device (13) is cut off.At this time by fairing (2) output current power supply, to output current do not contribute fully by stable-pressure device (13) and fairing (5) for circuit.At this moment, the circuit equivalent of Fig. 2 A is in the circuit of Fig. 1.This state remains to because alternating voltage v drops to v among Fig. 4 A always
2And make v among Fig. 3 A
10With v
13End during friendship.From Fig. 4 A as can be seen, at alternating voltage v from v
1Drop to v
2The time, v
10Also proportional thereupon decline.
V drops to v when alternating voltage
2The time, the v among Fig. 3 A
10With v
13Intersect, variation has taken place in foregoing circuit duty immediately.With v among Fig. 3 A
10Become v
10For example is described as follows.
At moment t
1The time, v
10Voltage stabilizing value v less than stable-pressure device (13)
13, and the input pulsating volage v of stable-pressure device (13) at this moment
nSurpassed v
13Shown in Fig. 3 B, stable-pressure device (13) is immediately to contact (10) output current I
11, to replenish v
10Decline.Along with I
nTo the charging of filter capacitor (3), v
10Raise gradually.To moment t
2The time, fairing (2) output voltage has surpassed v near the part of peak value
13(it is also to electric capacity (3) charging) makes v
10Surpass v
13, stable-pressure device (13) stops immediately to contact (10) output current, at this moment I
11Reducing to voltage zero and that exported near peak value by fairing (2) continues v
10Be charged to peak value t constantly
s, next cycle repeats said process again by the time.Electric current I
11Waveform see Fig. 3 C, it is discontinuous pulse waveform.Owing to reasons such as transformer internal resistances, producing electric current I
11Time t
1～t
2In, the voltage waveform v of contact (11)
nProduce a breach, shown in Fig. 3 B.
As can be seen from Figure 3, v
10If fall manyly more, i.e. v
10To v
10Direction translation, then v
10From less than v
13The moment t that begins to rise
1To v
10Reach v
13Moment t
2The interval long more, the electric current I that fairing (5) provides
11Pulse width just wide more, I
11Mean value just big more, the additional voltage that contact (10) obtains is just many more; Otherwise, if v
10Rise, promptly to v
10Direction translation, then t
1With t
2The interval short more, I
11Pulse width just narrow more, its mean value is just more little, the additional voltage that contact (10) obtains is also just few more.Because the effect of aforementioned self-regulating process is as the v of alternating voltage in Fig. 4 A
2To v
3When changing in this segment limit, the voltage v of contact (10)
10And by v
10The relative variation of input voltage of sound accompaniment voltage that provides and stable-pressure device (4) is less.In this self-regulating process, because I
11The variation of mean value and v are varied to inverse ratio, thereby the power consumption of stable-pressure device (13) and little.
When alternating voltage further descends again, as the v among Fig. 4 A
3To v
4During this segment limit, the peak value of fairing (2) output voltage all can not reach the voltage stabilizing output valve v of stable-pressure device (13)
13The time, flow through the electric current I of stable-pressure device (13)
11The power supply of the entire circuit that undertakes the whole thing.The voltage v of contact this moment (10)
10Be stabilized in certain scope by stable-pressure device (13), and fairing (2) is instead quit work partially.Though I at this moment
11Mean value bigger (equaling the required supply current of whole circuit), but since at this moment the output voltage of fairing (5) fall a lot, therefore, the power consumption P of entire circuit is still little.In this segment limit, the power consumption P of entire circuit has a peak value, and it occurs in before fairing (2) will quit work, and is corresponding to than v
3In the slightly high voltage range.This power consumption peaks can be controlled less than equaling v when alternating voltage
1The time pairing power consumption.The relation of power consumption and alternating voltage is seen Fig. 4 C.
Drop to the v of Fig. 4 A when alternating voltage
4When following, the input voltage of stable-pressure device (13) is lower than the operate as normal required voltage, the inner adjustment of stable-pressure device (13) guarantee adequate food and, v
10Can not Be Controlled and with the decline of the decline equal proportion of v.
In sum, from the analysis to circuit working state, alternating voltage is at v as can be seen
1To v
4When changing in the scope of this broad, the voltage v of contact (10)
10Change not quite relatively, sound accompaniment voltage is also more stable; v
10Through the output v after stable-pressure device (4) voltage stabilizing
0Just more stable.V and v
0Relation be shown in Fig. 4 B.
Fig. 2 B is one embodiment of the present of invention.It is with adjusting pipe (6), voltage ratio pipe (7), sampling microwave network (8) and make reference voltage and constitute stable-pressure device (13) by means of the voltage stabilizing output of stable-pressure device (4).Wherein, the controlled utmost point of adjustment pipe (6) is linked to or is linked to the output terminal of pipe (7) of voltage ratio by other element, two other utmost point of adjusting pipe (6) is associated in respectively between the output terminal (11) of the output terminal (10) of fairing (2) and high voltage fairing (5), voltage ratio is managed the comparison input end of (7) and the sampling output terminal of sampling microwave network (8) and is linked, and two sampling ends of sampling microwave network (8) are connected between the two ends (9) and (10) of fairing (2).Output voltage to fairing (5) and (2) carries out different ratio selections, can obtain different voltage adaptation scope and power consumption.For example when selecting for use ratio to be 2, can simplify Transformer Winding and constitute above-mentioned two fairings with all-wave and bridge-type dual mode.Circuit shown in Fig. 2 C is exactly this situation, and it is an another embodiment of the present invention." on the black and white television set, its voltage adaptation scope is that the 95v-242v rated disspation is less than 25w a kind of 14 with circuit application shown in Fig. 2 C." after on the black and white television set, alternating voltage accommodation expands to 120v-250v by original 170v-242v, and the 23w of Overall Power Consumption during by original 220v drops in the 120v-220v scope all less than 20w a kind of 14 with circuit application shown in Fig. 2 B.
Therefore, compared with prior art, the present invention not only has the advantage of voltage adaptation wide ranges, and can also reduce power consumption.In the time of for example on being applied to black and white television set, power-efficient can be near the low tension switch power supply, and does not have the interference of Switching Power Supply in the circuit, and application technology difficulty and cost all are lower than the low tension switch power supply and approach the stabilized voltage supply of connecting.
The present invention is simpler than the described circuit of Chinese patent prospectus (85103811) with the automatic switching circuit of 220v voltage as 110v, only needs suitably to adjust the output voltage ratio of fairing (2) and (5).Circuit also has the characteristics that can adapt to any voltage between the 110v-220v automatically simultaneously.
Existing monolithic integrated regulator does not also have the function that high-level efficiency adapts to change in voltage on a large scale or changing voltage automatically.Use principle of the present invention and can design the efficient integrated regulator of voltage adaptive, this just makes that the practical application circuit is more succinct.
Fig. 5 is the theory diagram of the efficient integrated regulator of this voltage adaptive.
In this integrated regulator (20) inside, include two voltage regulation units (13) and (4).Voltage regulation unit (13) is than the voltage stabilizing value height of (4), and the input of the output of voltage regulation unit (13) and voltage regulation unit (4) links, and connects exit (a), (a) inserts the voltage of process rectifying and wave-filtering for external circuit; The input of voltage regulation unit (13) connects exit (b), (b) inserts than the high commutating voltage of exit (a) for external circuit; The output of voltage regulation unit (4) connects exit (c), exports burning voltage through (c) to external circuit.Voltage stabilizer (20) also has another exit (d), (d) as the common port of two groups of voltage inputs of (a) and (b), also can make voltage output end.
Claims (9)
1, a kind of voltage adaptive power circuit, the power transformer (1) that comprises a band rectification winding, one first fairing (2), one is connected on first fairing (2) output terminal (9,10) filter capacitor (3), it is characterized in that it also comprises second fairing (5) of a higher commutating voltage of generation, this second fairing (5) and a stable-pressure device (13), link to each other, said second fairing, this stable-pressure device (13) has a public output terminal with first fairing (2), another output terminal of stable-pressure device (13) links to each other with another output terminal of first fairing, when the output voltage of said first fairing is higher than the burning voltage of said stable-pressure device, this stable-pressure device is in or approaches cut-off state, when the output voltage of said first fairing is lower than this burning voltage, this stable-pressure device conducting, to filter capacitor (3) charging, make the filter capacitor both end voltage near or equal the burning voltage of this stable-pressure device.
2, power circuit as claimed in claim 1 is characterized in that being connected to second stable-pressure device (4) that a burning voltage is lower than said stable-pressure device (13) between the two ends (9,10) in filter capacitor (3).
3, as the circuit of claim 1 or 2, the reference voltage that it is characterized in that stable-pressure device (13) is the burning voltage by means of the outside.
4,, it is characterized in that between two output terminals (9,11) of fairing (5), not connecing filter capacitor as the circuit of claim 1 or 2.
5,, it is characterized in that the capacity that is connected between two output terminals (9,11) of fairing (5) is less than half filter capacitor of filter capacitor (3) capacity as the circuit of claim 1 or 2.
6, circuit as claimed in claim 3 is characterized in that not connecing filter capacitor between two output terminals (9,11) of fairing (5).
7, circuit as claimed in claim 3 is characterized in that the capacity that is connected to is less than half filter capacitor of filter capacitor (3) capacity between two output terminals (9,11) of fairing (5).
8, power circuit as claimed in claim 2 is characterized in that said stable-pressure device and said second stable-pressure device be made up of integrated circuit.
9, as claim 1 or 8 described voltage stabilizers, it is characterized in that the commutating voltage ratio that said first and second fairings produce is about 1: 2, it is to be realized by full-wave rectification and bridge rectifier by the same winding of transformer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87100634.0A CN1003144B (en) | 1987-02-06 | 1987-02-06 | Voltage adaptive power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87100634.0A CN1003144B (en) | 1987-02-06 | 1987-02-06 | Voltage adaptive power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87100634A CN87100634A (en) | 1987-10-21 |
| CN1003144B true CN1003144B (en) | 1989-01-25 |
Family
ID=4812956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87100634.0A Expired CN1003144B (en) | 1987-02-06 | 1987-02-06 | Voltage adaptive power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003144B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751919A (en) * | 2012-07-07 | 2012-10-24 | 浙江利欧股份有限公司 | Double-voltage automatic switchover switch and processing method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101075144B (en) * | 2006-05-17 | 2010-09-08 | 上海乐金广电电子有限公司 | Automatic power-supply switch |
| CN101520669B (en) * | 2008-02-27 | 2011-03-16 | 中兴通讯股份有限公司 | 300pin 10G optical module self-adaptive power |
| CN108428125A (en) * | 2018-04-23 | 2018-08-21 | 唐晓冬 | A kind of charging control system and method for self-service device |
-
1987
- 1987-02-06 CN CN87100634.0A patent/CN1003144B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751919A (en) * | 2012-07-07 | 2012-10-24 | 浙江利欧股份有限公司 | Double-voltage automatic switchover switch and processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN87100634A (en) | 1987-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6950319B2 (en) | AC/DC flyback converter | |
| US6256213B1 (en) | Means for transformer rectifier unit regulation | |
| US6147882A (en) | Single-stage input current shaping technique with voltage-doubler rectifier front-end | |
| US7141892B2 (en) | Power supply method of a line interactive UPS and the line interactive UPS | |
| CN102130608B (en) | Power supply device and method for adjusting power supply device | |
| JPH0866017A (en) | Switching power supply | |
| US6052290A (en) | Switch-mode supply with power factor correction | |
| CN1985423A (en) | Bi-directional energy conversion system | |
| CN104578820B (en) | A kind of high power density AC great current generator | |
| CN1003144B (en) | Voltage adaptive power circuit | |
| GB2307567A (en) | Load tap changing AC voltage regulator | |
| US5914869A (en) | Ac/dc transformerless voltage converter | |
| CN216391470U (en) | Voltage-regulating type multi-output dimming power supply conforming to American standard CLASS2 | |
| CN113890371A (en) | Multi-output power distribution control device | |
| CN208971395U (en) | Isolation type switching power supply | |
| US20060120003A1 (en) | Cuk converter with inductors and capacitors on both power lines | |
| JP2709210B2 (en) | Initial charging circuit of voltage source inverter | |
| CN103973141A (en) | Full-direct-current variable frequency air conditioner supplied with electricity by using switching power supply circuit | |
| SU1725348A1 (en) | Ac to dc voltage converter with voltage multiplication | |
| EP0907236A2 (en) | Switched series regulator | |
| CN220693006U (en) | Common main power independent regulation multi-output power supply | |
| JPS58182476A (en) | Rectifying device | |
| CN220628941U (en) | Charging circuit, charging equipment and charging system | |
| CN114301345B (en) | Automatic voltage regulating circuit of generator | |
| CN219739988U (en) | Charging circuit and charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |