CN108599592A - A kind of modularization isolated form large capacity high-gain rectifier - Google Patents

A kind of modularization isolated form large capacity high-gain rectifier Download PDF

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Publication number
CN108599592A
CN108599592A CN201810574910.9A CN201810574910A CN108599592A CN 108599592 A CN108599592 A CN 108599592A CN 201810574910 A CN201810574910 A CN 201810574910A CN 108599592 A CN108599592 A CN 108599592A
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diode
capacitance
anode
cathode
transformer
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CN108599592B (en
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邾玢鑫
段宛宜
刘崧
佘小莉
黄悦华
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China Three Gorges University CTGU
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer

Abstract

A kind of modularization isolated form large capacity high-gain rectifier, if it includes an input voltage source to set the rectifier,m（It must be even number）A module, an output filter capacitorC 0, an output diode D0And loadR L .In each module, first module bym1 capacitance and diode are constituted, other modules bymA capacitance and diode are constituted.Compared to conventional rectifier circuit, input and output voltage high gain and adjustable, each module input current can automatic current equalizing, solve the problems, such as to flow complexity when multiple module paralleling operation, and diode voltage stress and current stress are also reduced, and the working efficiency of rectifier is improved.

Description

A kind of modularization isolated form large capacity high-gain rectifier
Technical field
The present invention relates to a kind of rectifier, specifically a kind of modularization isolated form large capacity high-gain rectifier.
Background technology
Current voltage doubling rectifing circuit has obtained more application, such as X-ray machine, but its in high gain boost rectification occasion Input power is generally limited by the conveyance capacity of semiconductor diode, and is run according to multiple module paralleling, but because each module it Between parasitic parameter difference and the unbalanced problem of power distribution that generates, and device current stress is non-adjustable, in large capacity application Occasion is difficult to design.If only relying on the high no-load voltage ratio of isolated form transformer to promote the gain of rectifier, the change of large capacity, high turn ratio Transformer design is difficult, of high cost.The above problem limits application of the high-gain voltage doubling rectifing circuit in high-power applications occasion.
Invention content
To solve the problems, such as that large capacity voltage doubling rectifing circuit is difficult to build in the prior art, the present invention proposes a kind of modularization Number of modules is adjusted flexibly according to no application scenario in the isolated form rectifier of large capacity high-gain, realizes high-gain output, The automatic current equalizing of electric current and evenly distributing for power.
The technical solution that the present invention takes is：
A kind of modularization isolated form large capacity high-gain rectifier, the rectifier include an input power, m module, m For even number, output diode D0, filter capacitor C0, load RL；
First module includes that a no-load voltage ratio is 1：The transformer of N, n-1 capacitance C11、C12...C1(n-1)And n-1 two Pole pipe D11、D12...D1(n-1), second module includes that a no-load voltage ratio is 1：The transformer of N, n capacitance C21、C22...C2nAnd n A diode D21、D22...D2n, and so on to m-th of module, m-th of module includes that a no-load voltage ratio is 1：The transformer of N, n A capacitance Cm1、Cm2...CmnAnd n diode Dm1、Dm2...Dmn.Transformer T1To TmThe different name end of primary side is respectively connected with, and is become Depressor T1To TmThe different name end of secondary side is also respectively connected with, AC power other end ground connection；
The rectification implement body connection type is as follows：
In m module,
Side of the first module, transformer T1Primary side Same Name of Ends draw, the secondary side of the first module, transformation Device T1Secondary side termination capacitor C of the same name1(n-1)One end, capacitance C1(n-1)One end and transformer T1Node between secondary side Same Name of Ends It draws, capacitance C1(n-1)Another termination capacitor C1(n-2)One end, capacitance C1(n-1)With capacitance C1(n-2)Between node connect two poles Pipe D1(n-1)Cathode and extraction, D1(n-1)Anode is drawn；It is consecutively connected to n-th of capacitance C11One end, C11With C12Between section Point meets diode D12Cathode, D12Anode is drawn, capacitance C11Another terminating diode D11Cathode and extraction, D11Anode draws Go out；
Side of the second module, transformer T2Primary side Same Name of Ends draw, the secondary side of the second module, transformation Device T2Secondary side termination capacitor C of the same name2nOne end, capacitance C2nAnother termination capacitor C2(n-1)One end, capacitance C2nWith capacitance C2(n-1)Node meet diode D2nCathode and extraction, D2nAnode is drawn；It is consecutively connected to n-th of capacitance C21One end, C21 With C22Between node meet diode D22Cathode, D22Anode is drawn, capacitance C21Another terminating diode D21Cathode simultaneously It draws, D21Anode is drawn；
Side of third module, transformer T3Primary side Same Name of Ends draw, the secondary side of third module, transformation Device T3Secondary side termination capacitor C of the same name3nOne end, capacitance C3nAnother termination capacitor C3(n-1)One end, capacitance C3nWith capacitance C3(n-1)Node meet diode D3nCathode and extraction, D3nAnode is drawn；It is consecutively connected to n-th of capacitance C31One end, C31 With C32Between node meet diode D32Cathode, D32Anode is drawn, capacitance C31Another terminating diode D31Cathode simultaneously It draws, D31Anode is drawn；
And so on to m modules,
Side of m modules, transformer TmPrimary side Same Name of Ends draw, the secondary side of m modules, transformer TmSecondary side termination capacitor C of the same namemnOne end, capacitance CmnAnother termination capacitor Cm(n-1)One end, capacitance CmnWith capacitance Cm(n-1) Node meet diode DmnCathode, DmnAnode is drawn；It is consecutively connected to n-th of capacitance Cm1One end, Cm1With Cm2Between Node meets diode Dm2Cathode, Dm2Anode is drawn, capacitance Cm1Another terminating diode Dm1Cathode and extraction, Dm1Anode It draws.
It is connected between modules：
Module 1, transformer T1Primary side termination AC power one end of the same name, capacitance C1(n-1)One end and transformer T1Segmentum intercalaris The extraction terminating diode D of point2nAnode, diode D1(n-1)Cathode meet diode D2(n-1)Anode, diode D1(n-1)'s Anode meets diode DmnCathode；And so on arrive diode D11Cathode meet diode D21Anode, diode D11Anode connects two Pole pipe Dm2Cathode；
Module 2, transformer T2Primary side Same Name of Ends is grounded, diode D2nCathode meet diode D3nAnode, diode D2(n-1)Cathode meet diode D3(n-1)Anode；And so on arrive diode D21Cathode meet diode D31Anode；
Module 3, transformer T3Primary side termination AC power one end of the same name, diode D3nCathode meet diode D4nSun Pole, diode D3(n-1)Cathode meet diode D4(n-1)Anode；And so on arrive diode D31Cathode meet diode D41's Anode；
And so on to m modules,
Module m, transformer TmPrimary side Same Name of Ends is grounded, diode DmnCathode meet diode D1(n-1)Anode, two poles Pipe Dm(n-1)Cathode meet diode D1(n-2)Anode；And so on arrive diode Dm2Cathode meet diode D11Anode；
Finally in capacitance Cm1Another terminating diode D0Anode, diode D0Cathode and capacitance C0With load RL's One end is connected, capacitance C0With load RLThe other end and transformer T1Secondary side Same Name of Ends is connected.
The present invention proposes that a kind of modularization isolated form large capacity high-gain rectifier, technique effect are as follows：
1, the present invention realizes that high-gain exports using modularization non-isolation type rectifier, adjusts according to demand in each module The number of diode and capacitance improves gain.The voltage stress of diode is also reduced simultaneously, improves converter Working efficiency.Wherein：
Input and output gain is (not considering load effect)：
The voltage stress of diode is：
Wherein, m is number of modules, and n is the quantity of Circuit Fault on Secondary Transformer diode and capacitance in module, and N is transformer voltage ratio.
2, it can realize that automatic current equalizing, the power-sharing of transformer are not necessarily to sensor when the converter multiple module paralleling is run Ensure to flow with control strategy.
3, high-gain is realized using modular construction, eliminates AC transformer that is heavy and accounting for volume, reduces system Volume reduces system cost, has wide range of applications, and improves the whole work efficiency of converter.
Description of the drawings
Fig. 1 is circuit theory total figure of the present invention.
Fig. 2 is that circuit of the present invention is m=4, the circuit topology figure of n=2.
Fig. 3 is to flow principle analysis figure.
Fig. 4 is input, output voltage simulation waveform.
Fig. 5 is four blocks current average value simulation waveforms.
Fig. 6 is capacitance voltage simulation waveform.
Fig. 7 is diode D22、D32、D0Voltage simulation waveform.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 2, a kind of 4 module rectifiers of modularization isolated form large capacity high-gain, including an input power, 4 modules, an output diode D0, one exports and filter capacitor C0, load RL, AC power cathode ground connection.First mould Block includes that a no-load voltage ratio is 1：The transformer of N, 1 capacitance C11And 1 diode D11, second module be comprising a no-load voltage ratio 1：The transformer of N, 2 capacitance C21、C22And 2 diode D21、D22, third module includes that a no-load voltage ratio is 1：The transformation of N Device, 2 capacitance C31、C32And 2 diode D31、D32, the 4th module includes that a no-load voltage ratio is 1：The transformer of N, 2 capacitances C41、C42And 2 diode D41、D42.Transformer T1To T4The different name end of primary side is respectively connected with, transformer T1To T4Secondary side Different name end is also respectively connected with, AC power other end ground connection.The rectification implement body connection type is as follows：
In 4 modules,
First module, a side, transformer T1Primary side Same Name of Ends draw, secondary side, transformer T1Secondary side is same Name termination capacitor C11One end, capacitance C11One end and transformer T1Node between secondary side Same Name of Ends is drawn, capacitance C11It is another Terminating diode D11Cathode and extraction, D11Anode is drawn；
Second module, a side, transformer T2Primary side Same Name of Ends draw, secondary side, transformer T2Secondary side is same Name termination capacitor C22One end, capacitance C22Another termination capacitor C21One end, capacitance C22With capacitance C21Node connect diode D22Cathode and extraction, D22Anode is drawn, capacitance C21Another terminating diode D21Cathode and extraction, D21Anode is drawn；
Third module, a side, transformer T3Primary side Same Name of Ends draw, secondary side, transformer T3Secondary side is same Name termination capacitor C32One end, capacitance C32Another termination capacitor C31One end, capacitance C32With capacitance C31Node connect diode D32Cathode and extraction, D32Anode is drawn, capacitance C31Another terminating diode D31Cathode and extraction, D31Anode is drawn；
4th module, a side, transformer T4Primary side Same Name of Ends draw, secondary side, transformer T4Secondary side is same Name termination capacitor C42One end, capacitance C42Another termination capacitor C41One end, capacitance C42With capacitance C41Node connect diode D42Cathode, D42Anode is drawn, capacitance C41Another terminating diode D41Cathode and extraction, D41Anode is drawn.
It is connected between modules：
Module 1, transformer T1Primary side Same Name of Ends draws termination AC power one end, capacitance C11One end and transformer T1It The extraction terminating diode D of intermediate node22Anode, diode D11Cathode meet diode D21Anode, diode D11Anode connects Diode D42Cathode；
Module 2, transformer T2Primary side Same Name of Ends exit is grounded, diode D22Cathode meet diode D32Anode, Diode D21Cathode meet diode D31Anode；
Module 3, transformer T3Primary side Same Name of Ends draws termination AC power one end, diode D32Cathode connect diode D42Anode, diode D31Cathode meet diode D41Anode；
Module 4, transformer T4Primary side Same Name of Ends exit is grounded, diode D42Cathode meet diode D11Anode.
Finally in capacitance C41Another terminating diode D0Anode, diode D0Cathode and capacitance C0With load RL's One end is connected, capacitance C0With load RLThe other end and transformer T1Secondary side Same Name of Ends is connected.
According to the difference of power switch state, circuit can be divided into three kinds of working conditions：
(1), when input AC electricity is in positive axis, input power passes through transformer T1Primary side Same Name of Ends, transformer T2 Primary side different name end is grounded to form primary side circuit, and induced current passes through the first transformer T1Secondary side Same Name of Ends passes through diode D22, the second transformer T2To capacitance C22Charging, passes through capacitance C11With diode D21To capacitance C21C is given in charging11Electric discharge；Input Power supply passes through transformer T3Primary side Same Name of Ends, transformer T4Primary side different name end is grounded to form primary side circuit, induced electricity circulation Cross third transformer T3Secondary side Same Name of Ends passes through capacitance C32, diode D42, the 4th transformer T4To capacitance C42C is given in charging32 Electric discharge, passes through capacitance C31With diode D41To capacitance C41C is given in charging31Electric discharge；Diode D at this timeo、D11、D31、D32It is turned off.
(2), when input AC electricity is in negative semiaxis, input power passes through transformer T at this time2Primary side Same Name of Ends becomes Depressor T3Primary side different name end is grounded to form primary side circuit, and induced current passes through the second transformer T2Secondary side Same Name of Ends passes through Capacitance C22, diode D32, third transformer T3To capacitance C32Capacitance C is given in charging22Electric discharge, passes through capacitance C21With diode D31 To capacitance C31C is given in charging21Electric discharge；Input power passes through transformer T4Primary side Same Name of Ends, transformer T1Primary side different name terminates Ground forms primary side circuit, and induced current passes through the 4th transformer T4Secondary side Same Name of Ends passes through capacitance C42, diode D11, first Transformer T1To capacitance C11C is given in charging42Electric discharge, passes through capacitance C41With diode Do, give C41Electric discharge, to capacitance CoCharging is simultaneously To load RLPower supply；Diode D at this time21、D41、D22、D42It is turned off.
Simulation parameter：Transformer voltage ratio is 1：1, input voltage uinFor the sinusoidal ac of power frequency amplitude 30V, direct current is exported Voltage u0For 120V.From fig. 5, it can be seen that the electric current for flowing through 4 transformers is equal, automatic current equalizing is realized.
Flow principle：
By taking a row diode capacitance in Fig. 3 as an example, it is 1 to take transformer voltage ratio:1.When stable state, from t0From moment, input electricity Press uinIt is begun to ramp up from 0, all diodes are turned off at this time, and filter capacitor is alone to load discharge.t1Moment, input voltage uin Rise to (uC41-uC31) when, diode D41It begins to turn on, capacitance C31Pass through D41To capacitance C41Charging, this stage input voltage uin=uC41-uC31。t2Moment, input voltage uinRise to capacitance C21Voltage dips when, D21Conducting, power supply pass through diode D21To capacitance C21Charging, UC21It begins to ramp up, this stage uC21=uin.When reaching the t=pi/2 moment, input voltage uinIt rises to Amplitude uinmax, input voltage u immediatelyinIt begins to decline, at this moment uin<uC21, uin<(uC41-uC31), all diodes are turned off, electricity Source stops to capacitance C21Charging, capacitance C31Stop to capacitance C41Charging, filter capacitor C0Start to load discharge.
When the t=π moment, input voltage UinIt drops to 0 and starts to inversely increase.t3Moment, input voltage UinInversely increase to (uC31-uC21) when, diode D31It begins to turn on, capacitance C21Pass through D31To capacitance C31Charging, this stage | uin|=uC31-uC21。t4 Moment, input voltage uinIt inversely increases to capacitance C41Voltage peak when, diode D0It begins to turn on, capacitance C41Pass through D0To filter Wave capacitance C0Charging, this stage | uin|=uC0-uC41.When reaching the t=3 pi/2 moment, input voltage uinIt inversely increases to width Value-uinmax, input voltage u immediatelyinStart reversed reduction, at this moment | uin|<uC31-uC21, | uin|<uC0-uC41, all diodes It is turned off, capacitance C41Stop to filter capacitor C0Charging, capacitance C21Stop to capacitance C31Charging, filter capacitor C0Start to load Electric discharge.
According to capacitance C0Ampere-second equilibrium principle, output current I0Equal to diode D0The electric current I flowed throughD0, due to capacitance C41Presence, flow through diode D41On electric current ID41Equal to ID0, and so on, in the first branch, flow through diode D21On Electric current ID21Equal to output current I0.Similarly, the electric current that other branches flow through also is equal to output current I0, the present invention realize from It is dynamic to flow.It expands to n module similarly and generates superposition, finally realize automatic current equalizing.

Claims (1)

1. a kind of modularization isolated form large capacity high-gain rectifier, which includes an input power, mA module, m For even number, output diode D0, filter capacitorC 0, loadR L ；
First module includes that a no-load voltage ratio is 1：NTransformer,n- 1 capacitanceC 11、C 12...C 1(n-1)Andn- 1 diode D11、D12...D1(n-1), second module includes that a no-load voltage ratio is 1：NTransformer,nA capacitanceC 21、C 22...C 2n AndnA two Pole pipe D21、D22...D2n , and so on tomA module, themA module includes that a no-load voltage ratio is 1：NTransformer,nA electricity HoldC m1、C m2...C mn AndnA diode D m1、D m2...D mn ；Transformer T1To T m The different name end of primary side is respectively connected with, transformer T1To T m The different name end of secondary side is also respectively connected with, AC power other end ground connection；
The rectification implement body connection type is as follows：
mIn a module,
Side of the first module, transformer T1Primary side Same Name of Ends draw, the secondary side of the first module, transformer T1 Secondary side termination capacitor of the same nameC 1(n-1)One end, capacitanceC 1(n-1)One end and transformer T1Node between secondary side Same Name of Ends draws Go out, capacitanceC 1(n-1)Another termination capacitorC 1(n-2)One end, capacitanceC 1(n-1)With capacitanceC 1(n-2)Between node connect diode D1(n-1)Cathode and extraction, D1(n-1)Anode is drawn；It is consecutively connected tonA capacitanceC 11One end,C 11WithC 12Between node Meet diode D12Cathode, D12Anode is drawn, capacitanceC 11Another terminating diode D11Cathode and extraction, D11Anode draws Go out；
Side of the second module, transformer T2Primary side Same Name of Ends draw, the secondary side of the second module, transformer T2 Secondary side termination capacitor of the same nameC 2n One end, capacitanceC 2n Another termination capacitorC 2(n-1)One end, capacitanceC 2n With capacitanceC 2(n-1)'s Node meets diode D2n Cathode and extraction, D2n Anode is drawn；It is consecutively connected tonA capacitanceC 21One end,C 21WithC 22It Between node meet diode D22Cathode, D22Anode is drawn, capacitanceC 21Another terminating diode D21Cathode and extraction, D21 Anode is drawn；
Side of third module, transformer T3Primary side Same Name of Ends draw, the secondary side of third module, transformer T3 Secondary side termination capacitor of the same nameC 3n One end, capacitanceC 3n Another termination capacitorC 3(n-1)One end, capacitanceC 3n With capacitanceC 3(n-1)'s Node meets diode D3n Cathode and extraction, D3n Anode is drawn；It is consecutively connected tonA capacitanceC 31One end,C 31WithC 32It Between node meet diode D32Cathode, D32Anode is drawn, capacitanceC 31Another terminating diode D31Cathode and extraction, D31 Anode is drawn；
And so on tomModule,
ThemSide of module, transformer T m Primary side Same Name of Ends draw, themThe secondary side of module, transformer T m Two Secondary side termination capacitor of the same nameC mn One end, capacitanceC mn Another termination capacitorC m(n-1)One end, capacitanceC mn With capacitanceC m(n-1)Section Point meets diode D mn Cathode, D mn Anode is drawn；It is consecutively connected tonA capacitanceC m1One end,C m1WithC m2Between node Meet diode D m2Cathode, D m2Anode is drawn, capacitanceC m1Another terminating diode D m1Cathode and extraction, D m1Anode draws Go out；
It is connected between modules：
Module 1, transformer T1Primary side termination AC power one end of the same name, capacitanceC 1(n-1)One end and transformer T1Intermediate node Draw terminating diode D2n Anode, diode D1(n-1)Cathode meet diode D2(n-1)Anode, diode D1(n-1)Anode Meet diode D mn Cathode；And so on arrive diode D11Cathode meet diode D21Anode, diode D11Anode connects diode D m2Cathode；
Module 2, transformer T2Primary side Same Name of Ends is grounded, diode D2n Cathode meet diode D3n Anode, diode D2(n-1) Cathode meet diode D3(n-1)Anode；And so on arrive diode D21Cathode meet diode D31Anode；
Module 3, transformer T3Primary side termination AC power one end of the same name, diode D3n Cathode meet diode D4n Anode, Diode D3(n-1)Cathode meet diode D4(n-1)Anode；And so on arrive diode D31Cathode meet diode D41Sun Pole；
And so on tomModule,
Modulem, transformer T m Primary side Same Name of Ends is grounded, diode D mn Cathode meet diode D1(n-1)Anode, diode D m(n-1)Cathode meet diode D1(n-2)Anode；And so on arrive diode D m2Cathode meet diode D11Anode；
Finally in capacitanceC m1Another terminating diode D0Anode, diode D0Cathode and capacitanceC 0And loadR L One end It is connected, capacitanceC 0And loadR L The other end and transformer T1Secondary side Same Name of Ends is connected.
CN201810574910.9A 2018-06-06 2018-06-06 Modularized isolation type high-capacity high-gain rectifier Active CN108599592B (en)

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US20120286678A1 (en) * 2009-12-28 2012-11-15 Inventronics (Hangzhou) Co., Ltd. Drive circuit for realizing accurate constant current of multiple leds
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Application publication date: 20180928

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Denomination of invention: A Modular Isolation Large Capacity High Gain Rectifier

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