CN102647090A - Large-power power supply of double-power amplifier - Google Patents
Large-power power supply of double-power amplifier Download PDFInfo
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- CN102647090A CN102647090A CN2012101007140A CN201210100714A CN102647090A CN 102647090 A CN102647090 A CN 102647090A CN 2012101007140 A CN2012101007140 A CN 2012101007140A CN 201210100714 A CN201210100714 A CN 201210100714A CN 102647090 A CN102647090 A CN 102647090A
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Abstract
The invention relates to a large-power power supply of a double-power amplifier, comprising a signal generator and a plurality of amplification and current-rising transformation circuits, wherein the amplification and current-rising transformation circuits comprise a first power amplifier, a second power amplifier and a double-winding current-rising transformer; the double-winding current-rising transformer comprises two primary coils and one secondary coil; first and second leading-out ends of the secondary coil are respectively connected with current output high ends and current output low ends of the amplification and current-rising transformation circuits; an input end of the first power amplifier and an input end of the second power amplifier are connected with an output end of a signal generator; and output ends of the first power amplifier and the second power amplifier are respectively connected with the two primary coils of the double-winding current-rising transformer. The large-power power supply utilizes the double-power amplifier to bear large-power load work and each double-power amplifier only can averagely bear one half of the load, so as to improve the full-loading performance and the reliability of operation for a long period of time, and meet the large-current and long-time working requirements of a multi-position detecting device.
Description
Technical field
The present invention relates to a kind of large power supply, relate in particular to a kind of pair of power amplifier large power supply.
Background technology
To use large power supply in the multi-epitope electric energy meter checkout equipment; The general structure of present large power supply is following: the ac small signal of single-phase signal source output flows to power amplifier; Each large power supply is only joined a power amplifier; Signal after power amplifier amplifies is used for promoting rising current transformer, and rising current transformer output suitable current offers the check ammeter and uses.This large power supply, the maximum output current capacity is every epi-position＞25VA, when being applied on the detection device of electric energy meter of pipeline-type; Because the epi-position number is a lot; Overall peak power output＞2500VA, therefore traditional large power supply general work will cause power amplifier tube to cross cause thermal damage in about 20 minutes, and fully loaded performance is bad; The long-play reliability is bad, can't satisfy pipeline electric energy meters checkout gear or the big electric current of multi-epitope calibrating installation, make the needs of time than the farm labourer.
Summary of the invention
The present invention mainly solves the used large power supply general work of original pipeline electric energy meters checkout gear and will cause power amplifier tube to cross cause thermal damage in about 20 minutes; Fully loaded performance is bad; The long-play reliability is bad, can't satisfy pipeline electric energy meters checkout gear or the big electric current of multi-epitope calibrating installation, make the technical problem of the needs of time than the farm labourer; A kind of pair of power amplifier large power supply is provided; Bear high-power load operation with two power amplifiers; Average each power amplifier is only born a halfload; Make power amplifier tube be difficult for cause thermal damage, improve fully loaded performance and long playing reliability, satisfy pipeline electric energy meters checkout gear or the big electric current of multi-epitope calibrating installation, make the needs of time than the farm labourer.
Another purpose of the present invention provides a kind of pair of power amplifier large power supply; Through current sampling mutual inductor the secondary current of the double wrap system rising current transformer that records is fed back to two power amplifiers; As other negative feedback of same level; Guarantee the consistency on big feedback aspect, make two power amplifiers work in same state, improve current balance property.
Another object of the present invention provides a kind of pair of power amplifier large power supply; First primary coil of double wrap system rising current transformer and second primary coil adopt two-wire and around structure; Guarantee that further two power amplifiers work in same state, improve current balance property.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals: the some amplification up-flow transforming circuits that the present invention includes signal generator and link to each other with signal generator; Described amplification up-flow transforming circuit comprises first power amplifier, second power amplifier and double wrap system rising current transformer; Described double wrap system rising current transformer has first primary coil, second primary coil and secondary coil; First exit of secondary coil, second exit are high-end with the electric current output of amplifying the up-flow transforming circuit respectively, electric current output low side links to each other; The input of the input of described first power amplifier, second power amplifier is equal to link to each other with the output of described signal generator; Two outputs of first power amplifier link to each other with the two ends of first primary coil of double wrap system rising current transformer respectively, and two outputs of second power amplifier link to each other with the two ends of second primary coil of double wrap system rising current transformer respectively.Amplifying in the up-flow transforming circuit has two power amplifiers, and double wrap system rising current transformer has two primary coils.During use, electric current output is high-end, the low termination large power, electrically current load of electric current output, promptly seized ammeter.The ac small signal of signal generator output flows to two power amplifiers; Signal after two power amplifiers amplify is used for promoting two primary coils of double wrap system rising current transformer respectively; By the secondary coil output suitable current of double wrap system rising current transformer, offer seized ammeter at last.High power load is born by two power amplifiers; Concerning each power amplifier; Be equivalent to only bear a half load, make power amplifier tube be difficult for cause thermal damage, improve fully loaded performance and long playing reliability; Satisfy the big electric current of multi-epitope calibrating installation, make the needs of time, be particularly suitable on pipeline-type ammeter verifying attachment and the intelligent full-automatic assembly line calibrating watt-hour meter device than the farm labourer.
As preferably; Described amplification up-flow transforming circuit comprises current sampling mutual inductor; Current sampling mutual inductor is connected the secondary coil of described double wrap system rising current transformer and amplifies between the electric current output low side of up-flow transforming circuit; Input of current sampling mutual inductor and second exit of secondary coil link to each other; Another input of current sampling mutual inductor links to each other with the electric current output low side that amplifies the up-flow transforming circuit, and the feedback input end of the output of current sampling mutual inductor and first power amplifier and the feedback input end of second power amplifier link to each other.Current sampling mutual inductor is gathered the current signal of the secondary coil of double wrap system rising current transformer; The current signal that collects flows to the feedback input end of two power amplifiers more simultaneously; As other negative feedback of same level; Guarantee the consistency on big feedback aspect, guarantee that two power amplifiers work in same state, improve current balance property.
As preferably; Described amplification up-flow transforming circuit comprises K switch 1 and K switch 2; K switch 1 is connected between the input of output and second power amplifier of described signal generator, and K switch 2 is connected between second primary coil of output and double wrap system rising current transformer of described second power amplifier.During heavy duty (is 25A, 50A or 100A like institute's inspection ammeter range), close a switch K1 and K switch 2 make the second power amplifier participation work, adopt two power amplifier outputs, bear load together by two power amplifiers; During underloading (like institute's inspection ammeter range smaller or equal to 10A), stopcock K1 and K switch 2 make second power amplifier not participate in work, only bear load by first power amplifier.Use flexibly, better effects if further improves the reliability of power amplifier work.
As preferably, first primary coil of described double wrap system rising current transformer and the second primary coil two-wire and on same bobbin.First primary coil and second primary coil adopt two-wire and around structure.Be used for coiling first primary coil enamelled wire be used for parallel the fitting together of enamelled wire of coiling second primary coil; Again simultaneously around to bobbin; After intact, the two ends of the two ends of first primary coil and second primary coil are connected on the different binding posts that are located on the bobbin.Adopt two-wire and around, guarantee that further two power amplifiers work in state on the same group, improve current balance property.
As preferably, described signal generator is single-phase signal generator, and described amplification up-flow transforming circuit is one.
As preferably, described signal generator is the three-phase signal generator, and described amplification up-flow transforming circuit has three, and three are amplified the up-flow transforming circuits and link to each other with three outputs of three-phase signal generator respectively.
The invention has the beneficial effects as follows: bear high-power load operation with two power amplifiers, on average each power amplifier is only born a halfload, makes power amplifier tube be difficult for cause thermal damage, improves fully loaded performance and long playing reliability.Two primary coils of double wrap system rising current transformer adopt two-wire and around; Through current sampling mutual inductor the secondary current of double wrap system rising current transformer is fed back to two power amplifiers simultaneously; Make two power amplifiers work in same state, improve current balance property.The present invention satisfies the big electric current of multi-epitope calibrating installation, makes the needs of time than the farm labourer, is particularly suitable on pipeline-type ammeter verifying attachment and the intelligent full-automatic assembly line calibrating watt-hour meter device.
Description of drawings
Fig. 1 is a kind of circuit principle structure block diagram of the present invention.
Fig. 2 is a kind of side-looking structural representation of first, second primary coil of double wrap system rising current transformer among the present invention.
Fig. 3 is an another kind of circuit principle structure block diagram of the present invention.
1. single-phase signal generators among the figure, 2. first power amplifier, 3. second power amplifier, 4. double wrap system rising current transformer; 5. first primary coil, 6. second primary coil, 7. secondary coil; 8. electric current output is high-end, 9. electric current output low side, 10. current sampling mutual inductor; 11. bobbin, 12. amplify up-flow transforming circuit, 13. three-phase signal generators.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment 1: two power amplifier large power supplies of present embodiment, be a single-phase large power supply, and as shown in Figure 1, comprise a single-phase signal generator 1 and an amplification up-flow transforming circuit 12 that links to each other with single-phase signal generator 1.Amplify up-flow transforming circuit 12 and comprise first power amplifier 2, second power amplifier 3, double wrap system rising current transformer 4, current sampling mutual inductor 10 and K switch 1, K switch 2.Double wrap system rising current transformer 4 has two primary coils and a secondary coil 7; Two primary coils are respectively first primary coil 5 and second primary coil 6; As shown in Figure 2, first primary coil 5 and second primary coil 6 adopt two-wires and around structure, two-wire and on same bobbin 11.That is to say; Be used for coiling first primary coil 5 enamelled wire be used for parallel the fitting together of enamelled wire of coiling second primary coil 6; Again simultaneously around to bobbin 11; After intact, the two ends of the two ends of first primary coil and second primary coil are connected on the different binding posts that are located on the bobbin.The input of first power amplifier 2 links to each other with the output of single-phase signal generator, and two outputs of first power amplifier 2 link to each other with the two ends of first primary coil 5 of double wrap system rising current transformer 4 respectively.The input of second power amplifier 3 links to each other through the output of K switch 1 and single-phase signal generator; In two outputs of second power amplifier 3; One end of second primary coil 6 of one of them and double wrap system rising current transformer 4 links to each other, and another links to each other through the other end of K switch 2 with second primary coil 6.First exit of the secondary coil 7 of double wrap system rising current transformer 4 is exported high-end 8 with the electric current that amplifies the up-flow transforming circuit and is linked to each other; Second exit of secondary coil 7 links to each other with the electric current output low side 9 that amplifies the up-flow transforming circuit through current sampling mutual inductor 10; That is: second exit of the secondary coil 7 of current sampling mutual inductor 10 input and double wrap system rising current transformer 4 links to each other, and another input of current sampling mutual inductor 10 and the electric current output low side 9 that amplifies the up-flow transforming circuit link to each other.The feedback input end of the output of current sampling mutual inductor 10 and first power amplifier 2 and the feedback input end of second power amplifier 3 link to each other.During use, electric current is exported high-end 8, electric current output low side 9 order phase large power, electrically current loads, promptly seized single-phase ammeter is supplied with seized single-phase ammeter suitable current.
Embodiment 2: two power amplifier large power supplies of present embodiment; It is a three-phase large power supply; As shown in Figure 3, comprise three-phase signal generator 13 and three amplification up-flow transforming circuits 12, first A phase output terminal that amplifies up-flow transforming circuit 12 and three-phase signal generator 13 links to each other; Second B phase output terminal that amplifies up-flow transforming circuit 12 and three-phase signal generator 13 links to each other, and the 3rd C phase output terminal that amplifies up-flow transforming circuit 12 and three-phase signal generator 13 links to each other.All the other structures are with embodiment 1.During use; Electric current output of first amplification up-flow transforming circuit is high-end, the A phase current input in the seized three-phase kilowatt-hour meter of termination is hanged down in electric current output; The electric current output of second amplification up-flow transforming circuit is high-end, the B phase current input in the seized three-phase kilowatt-hour meter of termination is hanged down in electric current output; The electric current output of the 3rd amplification up-flow transforming circuit is high-end, the C phase current input in the seized three-phase kilowatt-hour meter of termination is hanged down in electric current output, supplies with seized three-phase kilowatt-hour meter suitable current.
The two power amplifier large power supplies of the present invention; 100A current status, bringing onto load power can not damage more than one hour by steady operation greater than 2500VA; Operating time is longer than traditional large power supply greatly; Reliability is high, satisfies the big electric current of multi-epitope calibrating installation, than the needs that the farm labourer does the time, is particularly suitable on pipeline-type ammeter verifying attachment and the intelligent full-automatic assembly line calibrating watt-hour meter device.
Claims (6)
1. two power amplifier large power supply; It is characterized in that comprising signal generator and the some amplification up-flow transforming circuits (12) that link to each other with signal generator; Described amplification up-flow transforming circuit (12) comprises first power amplifier (2), second power amplifier (3) and double wrap system rising current transformer (4); Described double wrap system rising current transformer (4) has first primary coil (5), second primary coil (6) and secondary coil (7); First exit of secondary coil (7), second exit link to each other with the electric current output high-end (8) of amplifying up-flow transforming circuit (12), electric current output low side (9) respectively; The input of the input of described first power amplifier (2), second power amplifier (3) all links to each other with the output of described signal generator; Two outputs of first power amplifier (2) link to each other with the two ends of first primary coil (5) of double wrap system rising current transformer (4) respectively, and two outputs of second power amplifier (3) link to each other with the two ends of second primary coil (6) of double wrap system rising current transformer (4) respectively.
2. according to claim 1 pair of power amplifier large power supply; It is characterized in that described amplification up-flow transforming circuit (12) comprises current sampling mutual inductor (10); Current sampling mutual inductor (10) is connected the secondary coil (7) of described double wrap system rising current transformer (4) and amplifies between the electric current output low side (9) of up-flow transforming circuit (12); Input of current sampling mutual inductor (10) and second exit of secondary coil (7) link to each other; Another input of current sampling mutual inductor (10) links to each other with the electric current output low side (9) that amplifies up-flow transforming circuit (12), and the feedback input end of the output of current sampling mutual inductor (10) and first power amplifier (2) and the feedback input end of second power amplifier (3) link to each other.
3. according to claim 1 pair of power amplifier large power supply; It is characterized in that described amplification up-flow transforming circuit (12) comprises K switch 1 and K switch 2; K switch 1 is connected between the input of output and second power amplifier (3) of described signal generator, and K switch 2 is connected between second primary coil (6) of output and double wrap system rising current transformer (4) of described second power amplifier (3).
4. according to claim 1 or 2 or 3 described pairs of power amplifier large power supplies, it is characterized in that first primary coil (5) and second primary coil (6) two-wire of described double wrap system rising current transformer (4) and on same bobbin (11).
5. according to claim 1 or 2 or 3 described pairs of power amplifier large power supplies, it is characterized in that described signal generator is single-phase signal generator (1), described amplification up-flow transforming circuit (12) is one.
6. according to claim 1 or 2 or 3 described pairs of power amplifier large power supplies; It is characterized in that described signal generator is three-phase signal generator (13); Described amplification up-flow transforming circuit (12) has three, and three are amplified up-flow transforming circuit (12) and link to each other with three outputs of three-phase signal generator (13) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101007140A CN102647090A (en) | 2012-04-09 | 2012-04-09 | Large-power power supply of double-power amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101007140A CN102647090A (en) | 2012-04-09 | 2012-04-09 | Large-power power supply of double-power amplifier |
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| CN102647090A true CN102647090A (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101007140A Pending CN102647090A (en) | 2012-04-09 | 2012-04-09 | Large-power power supply of double-power amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001571A (en) * | 2018-07-19 | 2018-12-14 | 深圳宜特检测技术有限公司 | A kind of strengthening electric current power method and device for ageing management machine |
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| CN1893258A (en) * | 2000-08-17 | 2007-01-10 | 艾利森公司 | Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control |
| CN201138565Y (en) * | 2008-01-17 | 2008-10-22 | 深圳市安科讯实业有限公司 | Novel circuit for frequency lock driven by LCD and CCFL |
| CN201663550U (en) * | 2010-04-17 | 2010-12-01 | 浙江广天变压器有限公司 | Multi-loop independent power supply parallel transformer |
| CN102208869A (en) * | 2011-05-26 | 2011-10-05 | 南京航空航天大学 | DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs |
| CN202513830U (en) * | 2012-04-09 | 2012-10-31 | 浙江涵普电力科技有限公司 | High-power power supply with double power amplifiers |
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2012
- 2012-04-09 CN CN2012101007140A patent/CN102647090A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052104U (en) * | 1989-08-12 | 1990-01-31 | 吕德成 | Electronic igniter with dc/ac pulse |
| US5115203A (en) * | 1990-06-25 | 1992-05-19 | Rockwell International Corporation | Digital power amplifier |
| CN1158180A (en) * | 1995-05-31 | 1997-08-27 | 菲利浦电子有限公司 | Circuit bias via transformation |
| CN1893258A (en) * | 2000-08-17 | 2007-01-10 | 艾利森公司 | Amplification systems and methods using fixed and modulated power supply voltages and buck-boost control |
| CN2715409Y (en) * | 2004-07-13 | 2005-08-03 | 刘双锋 | AC inverters parallel arrangement |
| CN201138565Y (en) * | 2008-01-17 | 2008-10-22 | 深圳市安科讯实业有限公司 | Novel circuit for frequency lock driven by LCD and CCFL |
| CN201663550U (en) * | 2010-04-17 | 2010-12-01 | 浙江广天变压器有限公司 | Multi-loop independent power supply parallel transformer |
| CN102208869A (en) * | 2011-05-26 | 2011-10-05 | 南京航空航天大学 | DC (direct-current) converter voltage-sharing technology with multiple modules having series inputs and parallel outputs |
| CN202513830U (en) * | 2012-04-09 | 2012-10-31 | 浙江涵普电力科技有限公司 | High-power power supply with double power amplifiers |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001571A (en) * | 2018-07-19 | 2018-12-14 | 深圳宜特检测技术有限公司 | A kind of strengthening electric current power method and device for ageing management machine |
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Application publication date: 20120822 |