CN109818494A - A kind of quasi- source Y DC-DC converter of high gain voltage type - Google Patents
A kind of quasi- source Y DC-DC converter of high gain voltage type Download PDFInfo
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- CN109818494A CN109818494A CN201910074597.7A CN201910074597A CN109818494A CN 109818494 A CN109818494 A CN 109818494A CN 201910074597 A CN201910074597 A CN 201910074597A CN 109818494 A CN109818494 A CN 109818494A
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Abstract
The invention discloses a kind of quasi- source the Y DC-DC converters of high gain voltage type, in conjunction with Y source network and Boost impedance network, circuit voltage gain is neatly determined using the three-winding transformer in Y source network, and higher boosting can be realized under identical duty ratio.To improve traditional Boost higher output voltage can only be obtained by improving duty ratio, but the current peak that will lead to output diode and switching tube simultaneously increases, conduction loss and capacitor impact become larger, the conversion efficiency of circuit is low and the short problem of service life, so that converter has the advantages that high conversion efficiency, high voltage gain, and circuit structure is simple and reliable.
Description
Technical field
The present invention relates to DC-DC converter technical field, more particularly to a kind of quasi- Y of high gain voltage type
Source DC-DC converter.
Background technique
With the development of human society, industrial production causes global energy consumption more and more, is with fossil fuel
The non-renewable energy resources deposit of representative, which is reduced rapidly, causes short supply phenomenon to get worse.Therefore renewable energy is clear with it
The characteristics of clean, sustainable development the hot spot as numerous scholars research, and for the generation mode of new energy, either photovoltaic is sent out
Electricity or fuel cell power generation, output voltage fluctuation is larger, so needing the DC-dc conversion electricity by High-gain
Road guarantees that output voltage is higher stable DC voltage.Currently, widely used DC-DC converter includes direct-type electricity
Road and transformer isolation formula circuit, the transformation of DC voltage may be implemented in they, but exist simultaneously power switch common conduct or
It can cause the short circuit of power supply or the over-voltage breakdown of switching device, poor reliability and boost capability relatively low disadvantage when shutdown.
And the voltage-type based on Conventional impedance source converter thought/current mode source of resistance DC converter can overcome aforementioned circuit reliable
Property difference defect, but its boost capability is limited, to further promote voltage gain, then needs to carry out the grade of impedance source network
Connection, not only greatly improves circuit cost in this way, but also the control of converter is relative complex.
Therefore, how to provide that a kind of voltage gain is high, the DC-DC converter of the simple high reliablity simultaneously of circuit is this
The problem of field technical staff's urgent need to resolve.
Summary of the invention
In view of this, the present invention provides the quasi- source the Y direct current-of a kind of high gain voltage type based on Y source converter thought is straight
Current converter combines Y source network with tradition Boost impedance network, step-less adjustment output DC voltage may be implemented, simultaneously
The damage that power supply short circuit and switching device are caused when power switch common conduct is avoided, circuit structure is simple, small in size, weight
Gently, boost capability is strong and high reliablity.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of quasi- source Y DC-DC converter of high gain voltage type, including, DC voltage source, electronic power switch,
Boost network, quasi- Y source network and DC load；The DC voltage source connects the electronic power switch, the Boost net
Network, the quasi- Y source network and the DC load；The quasi- Y source network insertion is connected in the Boost network；It is described
Boost is connected to the network the DC load；The electronic power switch connects the Boost network and the quasi- Y source network.
Preferably, the quasi- Y source network is by inductance L1, three winding coupling inductance, capacitor C1With capacitor C2It constitutes；Institute
State inductance L1Connect the capacitor C1With the three winding coupling inductance；The three winding coupler and the capacitor C2Phase
Even.
Preferably, there are two the electronic power switch, the electronic power switch is IGBT module, power for setting
MOSFET is made of power diode and all-controlling power electronics device inverse parallel.
Preferably, the DC voltage source is battery group, fuel cell, distributed generation resource or filters by uncontrollable rectification
The AC power source of wave.
Preferably, two electronic power switches use complementary on-off control mode, realize the simple control of circuit.
Preferably, the electronic power switch adjusts output voltage gain by adjusting duty ratio, while can also lead to
It crosses and the turn ratio of suitable coupling inductance is selected to carry out the ratio of gains appropriate for improving converter.
Preferably, the three winding coupling inductance in the quasi- Y source network uses E-type magnetic core, reduces the body of circuit
Product, while leakage inductance is reduced to a certain extent, reduce influence of the leakage inductance to circuit.
Preferably, the quasi- source the Y DC-DC converter of a kind of high gain voltage type has straight-through and non-straight-through two kinds of works
Make state.
It can be seen via above technical scheme that compared with prior art, the present disclosure provides a kind of high gain voltages
The quasi- source the Y DC-DC converter of type changes on the basis of traditional quasi- Y source circuit structure in conjunction with the formation of Boost boost converter
Into the quasi- source the Y DC-DC converter of type, the high step-up ratio of the existing source Y DC-to-dc converter and design magnetism are being inherited
While the advantages of flexibility of winding, there is the features such as voltage gain is high, continuous input current, inrush current is small.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is the quasi- source the Y dc-dc converter circuit structural schematic diagram of high gain voltage type provided by the invention；
Fig. 2 attached drawing is converter applications electrical block diagram provided by the invention；
Fig. 3 attached drawing is two kinds of working state circuit attachment structure schematic diagrams provided by the invention；
Fig. 4 attached drawing is integrated IGBT module equivalent switch circuit diagram structure schematic diagram provided by the invention；
Fig. 5 attached drawing is the different theoretical voltage gains variation signals that converter is acted on around group factor provided by the invention
Figure；
Fig. 6 attached drawing is pulse signal schematic diagram provided by the invention；
Fig. 7 attached drawing is that inductive current provided by the invention changes schematic diagram；
Fig. 8 attached drawing is that condenser voltage provided by the invention changes schematic diagram；
Fig. 9 attached drawing is that input voltage provided by the invention and output voltage change schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of quasi- source the Y DC-DC converters of high gain voltage type, including, DC voltage
Source, electronic power switch, Boost network, quasi- Y source network and DC load；DC voltage source connection electronic power switch,
Boost network, quasi- Y source network and DC load；Quasi- Y source network insertion is connected in Boost network；Boost is connected to the network quasi- Y
Source network and DC load；Electronic power switch connects Boost network and quasi- Y source network.
In order to further optimize the above technical scheme, quasi- Y source network is by inductance L1, three winding coupling inductance and capacitor C1
With capacitor C2It constitutes；Inductance L1Connect capacitor C1With three winding coupling inductance；Three winding coupler and capacitor C2It is connected.
In order to further optimize the above technical scheme, electronic power switch is for IGBT module, power MOSFET or by power
Diode and all-controlling power electronics device inverse parallel are constituted, and using integrated IGBT module, utilize pwm control signal control switch
The on-off of pipe, to effectively improve the voltage gain and efficiency of system.
In order to further optimize the above technical scheme, DC voltage source be battery group, fuel cell, distributed generation resource or
By the AC power source of uncontrollable rectifying and wave-filtering.
In order to further optimize the above technical scheme, the duty ratio of the pulse signal of electronic power switch is controlled by adjusting
Adjust output voltage gain, while can also by selecting the turn ratio of suitable coupling inductance come raising converter appropriate
The ratio of gains.
In order to further optimize the above technical scheme, two electronic power switches can use complementary on-off, enhance
The simplicity of circuit control.
In order to further optimize the above technical scheme, the three winding coupling inductance in quasi- Y source network uses E-type magnetic core, contracting
The small volume of circuit, while leakage inductance is reduced to a certain extent, the leakage inductance between coupling inductance will lead to biggish open
It closes transition and reduces effective duty cycle of switching, to reduce the voltage gain and efficiency of system, therefore coupling should be reduced as far as possible
The leakage between inductance is closed, the influence to circuit is reduced.
In order to further optimize the above technical scheme, the present invention has straight-through and non-straight-through two kinds of working conditions, two electricity
Power electronic switch is respectively SW1And SW2, work as SW1SW is connected2When shutdown, converter of the invention is in pass-through state；Work as SW2It leads
Logical SW1When shutdown, converter of the invention is in non-pass-through state.
In order to further optimize the above technical scheme, three winding coupling inductance includes three groups of winding coil N1、N2And N3, often
One end of a winding coil is respectively the first end, second end and third end of three winding coupling inductance；Electronic power switch includes
SW1And SW2；DC power supply is Vin；Boost impedance network includes L0、C0、D0And D2；DC load is RLoadAnd C3；VinAnode according to
It is secondary to pass through L0、SW2、C0It returns and is connected to VinCathode；SW2With C0Connecting node pass sequentially through L1、D1Connect three winding coupling inductance
The second end of first end, three winding coupling inductance passes through C2It returns and is connected to VinCathode；The third end of three winding coupling inductance passes through SW1
It returns and is connected to VinCathode, L1Also pass through C1It is connected to SWI, L0Also pass through D0It is connected to SW1, SW1Both ends be parallel with D2It is negative with direct current
Carry the series circuit constituted, DC load RLoadAnd C3It is connected in parallel.
Embodiment
Work as SW1Closure, SW2Circuit of the present invention is in pass-through state, circuit connection situation are as follows: V when disconnectioninAnode passes through L0
It returns and is connected to VinCathode, L0With VinThe intermediate node of cathode passes sequentially through the third end of three winding coupling inductance, three winding coupling inductance
Second end pass through C2It returns and is connected to VinCathode, L0With VinThe intermediate node of cathode also passes sequentially through C1、L1And C0It returns and is connected to VinCathode.
The circuit as shown in Fig. 3 (a) works under pass-through state, diode D0Conducting, diode D1And D2In reverse biased
And it turns off.Kirchhoff's second law (KVL) is applied in such a mode, the voltage equation under pass-through state are as follows:
-Vin+VL0=0 (1)
-VC0+VL1-VC1=0 (2)
VC2+VN2-VN3=0 (3)
N1: N2: N3=VN1: VN2: VN3 (4)
N1, N2And N3It is the umber of turn of coupling inductance.Formula (4) substitution formula (3) is obtained:
Work as SW1It disconnects, SW2Circuit of the present invention is in non-pass-through state, circuit connection situation are as follows: V when closureinAnode is successively
Pass through L0And C0It returns and is connected to VinCathode, L0And C0Connecting node pass through L1Connect the first end of three winding coupling inductance, three winding
The second end of coupling inductance passes through C2It returns and is connected to VinCathode, the third end of three winding coupling inductance is returned by DC load is connected to Vin
Cathode, the first end of three winding coupling inductance and third end are connected in parallel to C1。
The circuit as shown in Fig. 3 (b) is under non-pass-through state, diode D0It is turned off in reverse biased, diode D1And D2
It is connected, the voltage equation under non-pass-through state are as follows:
-Vin+VL'0+VC0=0 (6)
-VC0+VL'1-VC1-V0=0 (7)
-VC1+VL'1+VN'1+VN'2+VC2=0 (8)
VC1+VN'1+VN'3=0 (9)
(4) formula is updated in (9) formula, available:
Then have:
By voltage-second balance principle it is found that the voltage at inductance both ends is zero in a cycle in the steady state.Then for inductance L0、
L1There is following relationship with coupled inductor:
(5) formula and (11) formula are substituted into (14) Shi Ke get:
Then simultaneous (2), (4), (8), (11), (15), and substitute into formula (13) and can obtain:
By (2), (7) and (16) substitute into formula (13) and can obtain:
DefinitionThen formula (17) it is rewritable at:
Formula (1) and formula (6) are substituted into formula (12), then had:
Joint type (18) and formula (19), obtain the voltage gain calculation formula of circuit are as follows:
Overall gain, Lai Tigao circuit liter it can be concluded that, can be changed by changing duty ratio D and turn ratio K by formula (20)
Performance is pressed, as shown in Figure 5.As can be seen that high-transmission gain can be realized under lesser duty ratio by increasing turn ratio K, and
And improved quasi- Y source network has higher voltage gain ratio than traditional Z source network.
With different umber of turn ratio (N1: N2: N3), but winding factor K having the same, the numerical value of voltage gain and D
It is summarized as follows table 1:
The different umber of turns of table 1 than when voltage gain and duty ratio numerical value change table
The turn ratio of different three winding coupling inductances, winding factor K may be identical as seen from the above table, change duty ratio D
Then voltage gain changes.Since the turn ratio of three winding coupling inductance has various selectable property, circuit topology has more
Strong flexibility.
The present invention carries out verification experimental verification, builds low-power open loop experimental prototype in laboratory, is exported using TMS320F2812
One group of complementary pwm pulse signal, the on-off of control switch is carried out with this.To reduce leakage inductance, three winding coupling inductance uses E-type magnetic
Core simultaneously uses inverse-excitation type winding in production.If the following table 2 is experiment setup parameter value and test result table.
2 empirical value table of table
Work as D=0.144, when K=3, inductive current, capacitor C0And C2Voltage and output and input voltage in stable state
Experimental waveform figure it is as Figure 7-9.From experimental waveform figure it may be concluded that all waveform parameter values are close with theoretical value,
Output voltage is close to calculated value.
Fig. 6 is switch SW1Pulse signal variation, Fig. 7 be inductance L0And L1Curent change, Fig. 9 be work as K=4, D=
When 0.144, input voltage VinWith output voltage VoutWaveform variation.Above-mentioned mathematical derivation and experiment show are clearly demonstrate,proved
Better than conventional converters, the present invention has the estimated performance and the practicality that DC-to-dc converter proposed by the present invention is illustrated
Higher voltage gain and circuit structure is simpler changes overall gain by changing duty ratio and turn ratio, improves circuit liter
Press performance.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (6)
1. a kind of quasi- source Y DC-DC converter of high gain voltage type characterized by comprising DC voltage source, electric power electricity
Sub switch, Boost network, quasi- Y source network and DC load；The DC voltage source connects the electronic power switch, described
Boost network, the quasi- Y source network and the DC load；The quasi- Y source network insertion is connected in the Boost network；
The Boost is connected to the network the DC load；The electronic power switch connects the Boost network and the quasi- source the Y net
Network.
2. the quasi- source the Y DC-DC converter of a kind of high gain voltage type according to claim 1, which is characterized in that described
Quasi- Y source network is by inductance L1, three winding coupling inductance, capacitor C1With capacitor C2It constitutes；The inductance L1Connect the capacitor
Device C1With the three winding coupling inductance；The three winding coupler and the capacitor C2Connection.
3. the quasi- source the Y DC-DC converter of a kind of high gain voltage type according to claim 1, which is characterized in that setting
There are two the electronic power switch, the electronic power switch be IGBT module, power MOSFET or by power diode and
All-controlling power electronics device inverse parallel is constituted.
4. the quasi- source the Y DC-DC converter of a kind of high gain voltage type according to claim 1, which is characterized in that described
DC voltage source is battery group, fuel cell, distributed generation resource or the AC power source by uncontrollable rectifying and wave-filtering.
5. the quasi- source the Y DC-DC converter of a kind of high gain voltage type according to claim 3, which is characterized in that two
The electronic power switch uses complementary on-off control mode.
6. the quasi- source the Y DC-DC converter of a kind of high gain voltage type according to claim 1, which is characterized in that described
Converter has straight-through and non-straight-through two kinds of working conditions.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054672A (en) * | 2020-09-02 | 2020-12-08 | 青岛理工大学 | DC-DC high-voltage gain converter integrating switched capacitor and Y-source network |
| CN112398350A (en) * | 2020-11-09 | 2021-02-23 | 哈尔滨工业大学 | double-Y-source high-boost-ratio DC-DC converter |
| CN112491282A (en) * | 2020-11-06 | 2021-03-12 | 东北电力大学 | Y-source two-stage matrix converter modulation method based on carrier PWM |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054672A (en) * | 2020-09-02 | 2020-12-08 | 青岛理工大学 | DC-DC high-voltage gain converter integrating switched capacitor and Y-source network |
| CN112491282A (en) * | 2020-11-06 | 2021-03-12 | 东北电力大学 | Y-source two-stage matrix converter modulation method based on carrier PWM |
| CN112491282B (en) * | 2020-11-06 | 2021-10-01 | 东北电力大学 | Y-source two-stage matrix converter modulation method based on carrier PWM |
| CN112398350A (en) * | 2020-11-09 | 2021-02-23 | 哈尔滨工业大学 | double-Y-source high-boost-ratio DC-DC converter |
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