CN2070513U - Fixed voltage dividing rate series connection ac convertor - Google Patents
Fixed voltage dividing rate series connection ac convertor Download PDFInfo
- Publication number
- CN2070513U CN2070513U CN 90212955 CN90212955U CN2070513U CN 2070513 U CN2070513 U CN 2070513U CN 90212955 CN90212955 CN 90212955 CN 90212955 U CN90212955 U CN 90212955U CN 2070513 U CN2070513 U CN 2070513U
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- Prior art keywords
- converter
- direct current
- winding
- transformer
- resistance
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Abstract
The utility model discloses a series connection DC convertor with fixed voltage dividing rate, which is a novel electric power converting device which transforms direct current power to the output of the direct current power under another voltage. A main control direct current converter and a plurality of auxiliary control direct current converter are mutually connected in series to form the utility model. The utility model has the advantages that the utility model can freely select the voltage distribution proportion of voltage which is bridged on each DC converter which is connected in series with other DC converters according to working needs; the control process of a fixed voltage dividing rate is quick, has high reliability, is not influenced by external conditions and does not have aging and drifting problems; the numbers of the DC converters which are connected in series can be changed, so the flexibility is high. Due to the adoption of the main and auxiliary control principle, the circuit structure is simple and the manufacturing cost is low.
Description
The utility model relates to a kind of power conversion device, further be meant a kind of direct current power input can be transformed to direct current power output under the another kind of voltage decide voltage ratio series direct current converter.
Existing DC converter is owing to be subjected to the withstand voltage restriction of transistor itself, under high input DC power voltage, often need many series operations, yet transistorized voltage and current overload ability are all very limited, in order to make the product reliable operation, how to make the voltage of institute's cross-over connection on each platform that is in series carry out work according to the voltage distribution ratio of determining, the while also makes the electric current that flows through each well-balanced, is still a unsolved problem.
The purpose of this utility model, providing a kind of DC converter that can decide many tandem workings of voltage ratio, promptly is to make the voltage of institute's cross-over connection on each DC converter that is in series distribute the while and to make the electric current that flows through each middle crystal switch pipe consistent fast in the ratio of determining apace.
The utility model is finished as follows: with the master control DC converter of a band self-excitation drive circuit and being in series from control direct current transformer of (comprising one) more than one band separate excitation drive circuit, master control DC converter and the output that is in parallel from control direct current transformer also are connected to output filter capacitor, externally then be parallel to the output filter capacitor two ends with electric loading, on the switch transformer of master control DC converter, be provided with secondary self-excitation and drive winding and quantitatively equal secondary separate excitation driving winding, with respectively to the self-excitation drive circuit of self with respectively from the separate excitation drive circuitry of control direct current transformer from control direct current transformer platform number; Master control DC converter and respectively have a predetermined ratio between the elementary winding inductance value of the switch transformer from control direct current transformer, promptly be to make the ratio of the elementary winding inductance value of each switch transformer be directly proportional with the voltage of predefined institute's cross-over connection on corresponding DC converter, that is realized determining voltage ratio between predefined each DC converter with the inductance value of the elementary winding of each switch transformer, but and the size of each elementary winding inductance value coupling nationality helps the magnetic air gap length that changes each switch transformer or elementary umber of turn or magnetic circuit physical dimension to realize; Alive controlling unit of zero beginning with each crystal switch pipe, be to set elementary winding inductance value of switch transformer and the product of secondary output winding in the master control DC converter to elementary winding turns ratio, make its greater than respectively from control direct current transformer elementary winding inductance value of switch transformer and respective secondary output winding to the product of elementary winding turns ratio.
The utility model advantage is: (one) is only relevant with the relative ratio of the elementary winding inductance value of each switch transformer across the master control DC converter that is in series and the voltage distribution ratio from the control direct current transformer respectively, thereby can freely select to decide voltage ratio to satisfy different needs, for example, for the voltage uniform distribution that realizes connecting between each DC converter, then only need make the elementary winding inductance value of each switch transformer equate each other and can reach; (2) when realizing predetermined voltage distribution ratio, also realized to make the electric current that flows through crystal switch pipe in each DC converter of series connection to be consistent; (3) in case each switch transformer create, the relative ratio of each elementary winding inductance value just immobilizes, be not subjected to the influence of variation of ambient temperature and humidity and mechanical oscillation, do not have problems such as aging and drift yet, therefore make and decide the reliability that voltage ratio has height; (4) because each crystal switch pipe all is conducting synchronously and ending synchronously under zero beginning galvanization condition, this decides that the dividing potential drop realization of electric current unanimity does not when utilize the build-up effect of a plurality of work periods and the reaction time is shorter than a work period with regard to having illustrated, its course of work is very quick; (5) alive operating characteristic of zero beginning helps the crystal switch pipe (SDA) thereby has improved product reliability with interior work and reduced switching loss in the safety operation area; (6) owing to taked the cordwood system type circuit structure, the amount doesn't matter from the platform number of control direct current transformer series connection, flexibility is big; (7) owing to adopt principal and subordinate's control principle, control many from control direct current transformer by a master control DC converter, thereby make circuit greatly simplify, and adding the realization of deciding voltage ratio and do not adopt special semiconductor device, institute is so that low cost of manufacture of the present utility model.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is the utility model circuit frame principle figure;
Fig. 2 is a kind of physical circuit schematic diagram of Fig. 1.
Referring to Fig. 1, V is the straight supply voltage of input among the figure, (1) is the master control DC converter, (2) and (3) be from the control DC converter, (4) be output filter capacitor,, also can spread away (3) and become one though this embodiment's is (2) and (3) two from control direct current transformer, also can increase the platform number from control direct current transformer on the basis of Fig. 1 again, promptly be to represent this meaning shown in the dotted line among the figure.
Referring to Fig. 2, master control DC converter (1) comprising: crystal switch pipe T
1, contain elementary winding W
P1, secondary output winding W
S1, secondary self-excitation drives winding W
A1And secondary separate excitation drives winding W
B1And W
C1Switch transformer B
1, output rectifier diode D
1, by resistance R
P1And capacitor C
P1The input filter of forming is by resistance R
Q1, diode D
Q1And capacitor C
Q1The damping circuit of forming and by triode T
A1, diode d
1, resistance r
1, r
A1With r
K1And capacitor C
A1Voltage V is controlled in being added with of forming outward
A1The self-excitation drive circuit.Comprising from control direct current transformer (2): crystal switch pipe T
2, contain elementary winding W
P2And secondary output winding W
S2Switch transformer B
2, output rectifier diode D
2, by resistance R
P2And capacitor C
P2The input filter of forming is by resistance R
Q2, diode D
Q2And capacitor C
Q2The damping circuit of forming and by diode d
2And resistance r
2The separate excitation drive circuit of forming.Comprising from control direct current transformer (3): crystal switch pipe T
3, contain elementary winding W
P3And secondary output winding W
S3Switch transformer B
3, output rectifier diode D
3, by resistance R
P3And capacitor C
P3The input filter of forming is by resistance R
Q3, diode D
Q3And capacitor C
Q3The damping circuit of forming and by diode d
3And resistance r
3The separate excitation drive circuit of forming.The polarity of each winding is used " " expression respectively on figure.As from the foregoing, identical with the circuit structure of (3) from control direct current transformer (2), as increasing the platform number from control direct current transformer, wherein circuit structure is also identical.Among the figure, be connected on the DC power supply that input voltage is V after DC converter (1), (2) and (3) series connection.Output filter capacitor (4) is by capacitor C
LConstitute, after the output that it reaches (3) with DC converter (1), (2) is in parallel, the external electric loading R that uses
LCross-over connection is in T respectively
1, T
2And T
3The damping circuit at crystal switch pipe collection emitter-base bandgap grading two ends is for the usefulness that suppresses the overvoltage peak value.Then make the line ordinary telegram and press usefulness, in capacitor C respectively and the input filter that connects,
P1, C
P2And C
P3On voltage that is the voltage of cross-over connection on corresponding DC converter be respectively V
P1, V
P2And V
P3
The course of work of circuit is among Fig. 2: voltage V
P1Earlier by the resistance r in the master control DC converter (1)
K1To crystal switch pipe T
1The base stage injection current, make T
1Pipe enters the amplification region and at winding W
A1In just induce negative down voltage, this voltage is by resistance r
1And and speed-up capacitor C
A1Diode connected in parallel d
A1After, further strengthen T
1The base flow of pipe makes T
1Manage rapid saturation conduction; Meanwhile, winding W
B1(W
C1) in just also induce negative down voltage, by resistance r
2(r
3), make crystal switch pipe T
2(T
3) also rapid saturation conduction.T
1After the pipe conducting, flow through the current i of this pipe
P1Start from scratch and rise linearly, when this electric current surpasses T
1During the product of the base current of pipe and this tube current amplification coefficient, T
1Pipe withdraws from the saturation region, current i
P1Descend, cause winding W
A1, W
B1And W
C1In induced voltage all reverse, become go up negative down just, so each base current is also reverse, make T
1To T
3Pipe ends rapidly.The counter respectively T that is attempted by
1To T
3Diode d between the basic emitter-base bandgap grading of pipe
1To d
3Carry out the usefulness of amplitude limit with the reverse basic emitter voltage of opposing.At T
1To T
3Between the pipe off period, be stored in switch transformer B
1To B
3In magnetic energy, respectively by its secondary output winding W
S1To W
S3, more respectively through output diode D
1To D
3, to output filter capacitor C
LReach and use electric loading R
LDischarge, getting output voltage is V
LAs switch transformer B
1In magnetic energy discharge when finishing winding W
A1, W
B1And W
C1In go up and negatively positive induced voltage and disappear, T afterwards
1The circulation of managing and for example such at the beginning conducting once more and entering next work period.This shows crystal switch pipe T
1To T
3Synchronous conducting and end its ON time t synchronously
GWith work period t
FAll consistent with each other.Change V among the figure
A1The size of external control magnitude of voltage is in order to pass through resistance r
A1Change T
A1The base current of pipe, i.e. may command T
A1The size of pipe collector electric current has also just changed T
1The degree that the base current of pipe is shunted, thus T changed
1Pipe withdraws from the moment of saturation region after conducting, and has realized T with this
1To T
3Pipe ON time t
GThe control of length.
If establish switch transformer B
1, B
2And B
3Corresponding elementary winding W
P1, W
P2And W
P3The number of turn and inductance value be respectively N
P1, N
P2And N
P3And L
P1, L
P2And L
P3If B
1, B
2And B
3Corresponding secondary output winding W
S1, W
S2And W
S3The number of turn be respectively N
S1, N
S2And N
S3If flow through elementary winding W respectively
P1, W
P2And W
P3Electric current that is flow through crystal switch pipe T respectively
1, T
2And T
3Electric current be i
P1, i
P2And i
P3If B
1, B
2And B
3Magnetic energy be respectively t release time
E1, t
E2And t
E3, according to theoretical derivation, can get following three relational expressions:
i
P1=i
P2=i
P3(formula 1)
V
P1: V
P2: V
P3=L
P1: L
P2: L
P3(formula 2)
t
E1: t
E2: t
E3=(Nsl)/(Npl) L
P1: (N
S2)/(N
P2) L
P2: (N
S3)/(N
P3) L
P3(formula 3)
More than three relational expression institute revealed law also be applicable to from control direct current transformer to be any situation of (comprising) more than.By formula 1 as can be known, it is consistent with each other to flow through the electric current of each crystal switch pipe.
By formula 2 as can be known, cross-over connection is directly proportional with the elementary winding inductance value of respective switch transformer in the ratio between voltage on each DC converter.Regular according to this, if preestablish the voltage V of cross-over connection on each DC converter
P1, V
P2And V
P3Between ratio be a determined value, so just can be by determining B
1, B
2And B
3The inductance value of elementary winding realize deciding voltage ratio, to guarantee voltage V
P1, V
P2And V
P3Carry out work in the voltage distribution ratio of determining.For example, in order to realize that the voltage uniform distribution of cross-over connection on each DC converter is equal voltage ratio, just can take B
1, B
2And B
3The inductance value L of elementary winding
P1, L
P2And L
P3Equate that each other this up-to-date style 2 becomes:
V
P1：V
P2：V
P3＝1：1：1
By formula 3 as can be known, the ratio of magnetic energy release time of each switch transformer and respective switch primary winding inductance and secondary output winding are directly proportional to the product value of elementary winding turns ratio.If rule when manufacturing and designing switch transformer, makes B in advance according to this
1Elementary winding inductance and secondary output winding to the product value (N of elementary winding turns ratio
Sl)/(N
Pl) L
P1, all greater than B
2And B
3The respective primary winding inductance and secondary output winding to the product value (N of elementary winding turns ratio
S2)/(N
P2) L
P2And (N
S3)/(N
P3) L
P3, just can make t
E1Compare t
E2And t
E3All big, promptly be B
1Magnetic energy compare B release time
2And B
3Magnetic energy all long release time, so T
1During conducting, B
2And B
3In magnetic energy all discharged and finished, so make T
1, T
2And T
3Pipe all is zero at the initial current of conducting moment, promptly has alive operating characteristic of zero beginning.
Claims (5)
1, a kind ofly decides voltage ratio series direct current converter with what direct current power input was transformed to direct current power output under the another kind of voltage, (comprising one) more than one that its circuit comprises the master control DC converter, be in series with the master control DC converter is from control DC converter and output filter capacitor, in the master control DC converter with respectively from control direct current transformer, all have crystal switch pipe and a switch transformer, of the present utility model being characterised in that:
(A) in the master control DC converter with respectively from control direct current transformer, be respectively equipped with self-excitation drive circuit and separate excitation drive circuit, on the switch transformer of master control DC converter, be provided with secondary self-excitation and drive winding and quantitatively equal secondary separate excitation driving winding, with respectively to the self-excitation drive circuit of self with respectively from the shunt opening drive circuitry of control direct current transformer from control direct current transformer platform number;
(B) master control DC converter and respectively have a predetermined ratio between the elementary winding inductance value of the switch transformer from control direct current transformer promptly is to make the ratio of the elementary winding inductance value of each switch transformer be directly proportional with the voltage of predefined institute's cross-over connection on corresponding DC converter;
(C) has zero beginning galvanization controlling unit of each crystal switch pipe.
2, DC converter as claimed in claim 1, it is characterized in that, said zero beginning galvanization controlling unit with each crystal switch pipe, be to set elementary winding inductance value of switch transformer and the product of secondary output winding in the master control DC converter to elementary winding turns ratio, make its greater than respectively from control direct current transformer elementary winding inductance value of switch transformer and respective secondary output winding to the product of elementary winding turns ratio.
3, as claim 1,2 described DC converter, it is characterized in that, be (2) and (3) two from control direct current transformer with master control DC converter (1) is in series.
4, DC converter as claimed in claim 3 is characterized in that, master control DC converter (1) comprising: crystal switch pipe T
1, contain elementary winding W
P1, secondary output winding W
S1, secondary self-excitation drives winding W
A1And secondary separate excitation drives winding W
B1And W
C1Switch transformer B
1, output rectifier diode D
1, by resistance R
P1And capacitor C
P1The input filter of forming is by resistance R
Q1, diode D
Q1And capacitor C
Q1The damping circuit of forming and by triode T
A1, diode d
1With d
A1, resistance r
1, r
A1With r
K1And capacitor C
A1Voltage V is controlled in being added with of forming outward
A1The self-excitation drive circuit, comprising from control direct current transformer (2): crystal switch pipe T
2, contain elementary winding W
P2And secondary output winding W
S2Switch transformer B
2, output rectifier diode D
2, by resistance R
P2And capacitor C
P2The input filter of forming is by resistance R
Q2, diode D
Q2And capacitor C
Q2The damping circuit of forming and by diode d
2And resistance r
2The separate excitation drive circuit of forming comprising from control direct current transformer (3): crystal switch pipe T
3, contain elementary winding W
P3And secondary output winding W
S3Switch transformer B
3, output rectifier diode D
3, by resistance R
P3And capacitor C
P3The input filter of forming is by resistance R
Q3, diode D
Q3And capacitor C
Q3The damping circuit of forming and by diode d
3And resistance r
3The separate excitation drive circuit of forming.
5, DC converter as claimed in claim 4 is characterized in that, switch transformer B
1, B
2And B
3Corresponding elementary winding W
P1, W
P2And W
P3Inductance value L
P1, L
P2And L
P3Equate each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212955 CN2070513U (en) | 1990-06-05 | 1990-06-05 | Fixed voltage dividing rate series connection ac convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212955 CN2070513U (en) | 1990-06-05 | 1990-06-05 | Fixed voltage dividing rate series connection ac convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2070513U true CN2070513U (en) | 1991-01-30 |
Family
ID=4892465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212955 Withdrawn CN2070513U (en) | 1990-06-05 | 1990-06-05 | Fixed voltage dividing rate series connection ac convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2070513U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8035253B2 (en) | 2008-07-10 | 2011-10-11 | Delta Electronics, Inc. | Controlling method for multi-converter structure having series-connected inputs and parallel-connected outputs |
-
1990
- 1990-06-05 CN CN 90212955 patent/CN2070513U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8035253B2 (en) | 2008-07-10 | 2011-10-11 | Delta Electronics, Inc. | Controlling method for multi-converter structure having series-connected inputs and parallel-connected outputs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |