CN209200934U - A kind of direct current tri-lever boosting converter merging coupling inductance technology - Google Patents
A kind of direct current tri-lever boosting converter merging coupling inductance technology Download PDFInfo
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- CN209200934U CN209200934U CN201822140256.9U CN201822140256U CN209200934U CN 209200934 U CN209200934 U CN 209200934U CN 201822140256 U CN201822140256 U CN 201822140256U CN 209200934 U CN209200934 U CN 209200934U
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Abstract
The utility model belongs to DC-DC conversion equipment technical field, it is related to a kind of direct current tri-lever boosting converter for merging coupling inductance technology, main structure includes coupling inductance unit, three-level cells and clamp units, coupling inductance unit includes the first coupling inductance, the second coupling inductance, third coupling inductance, first diode and the second diode, and three-level cells include first switch tube, second switch, the first storage capacitor, the second storage capacitor, the first output capacitance, the second output capacitance and midpoint connecting line；Clamp units include the first clamp diode and the second clamp diode；Its structure is simple, easy to use, at low cost, and delivery efficiency is high, can achieve 90% overall efficiency.
Description
Technical field:
The utility model belongs to DC-DC conversion equipment technical field, and in particular to a kind of to merge the straight of coupling inductance technology
Flow tri-lever boosting converter.
Background technique:
In recent years, due to fossil fuel rapidly deplete and the increase of greenhouse gas emission, use renewable energy group
It is more and more at the obtained social concerns of distributed generation system.It is well known that solar energy is the most prospect for power generation
Property and one of the renewable energy of spatter property, carry out the development trend of power generation and other industrial activities increasingly using such energy
Rapidly, the research that both at home and abroad new energy technologies such as photovoltaic power generation are all given with fervent concern and great dynamics, for life
The releasing of protection and the non-renewable energy resources crisis of state environment, there is sizable realistic meaning.
However, the output of a solar panel is very low, many photovoltaic panels must be carried out by the way of series-multiple connection
Joint output reaches the actually required voltage value of electricity market with this, but takes such mode, can make system of entirely powering
The problem that failure rate of uniting increases, machine volume is excessive.Therefore, in many applications such as based on solar power system
In, one high gain boost module of access, which is required, by the low output voltage of solar battery cell is converted to electricity market prime
Required High Level DC Voltage.
In existing research, five kinds of conventional topologies Boost, Buck-Boost, Sepic, Cuk and Zeta be can achieve
The effect of boosting, and structure is simply easily controllable, but can not solve transformation in the case where avoiding limit duty ratio from occurring
Device realizes the problem of high voltage output gain.With more next for the demand of DC-DC high voltage gain converter in present society
More urgent, numerous domestic and foreign scholars are also increasing with depth to its research temperature, have several conducive to promotion DC converter
The common method of voltage conversion capability is widely used: coupling inductance module is added and using switched inductors electricity in converter cascade
Molar block etc., but these often have that the substantial increase of converter component number, overall volume significantly increases and leakage inductance greatly
The problems such as bring high voltage spike, so that the increased costs of converter itself, control difficulty increase.
Summary of the invention:
The goal of the invention of the utility model is to overcome disadvantage of the existing technology, designs and provide a kind of fusion coupling electricity
The direct current tri-lever boosting converter of sense technology avoids converter on the basis of guaranteeing that converter realizes larger transfer capability
The appearance of limit duty ratio situation ensure that overall security, effectively reduce the quantity of component and reduces control difficulty, reduces
The stress of corresponding switch element makes converter cost of manufacture decrease.
To achieve the goals above, the direct current tri-lever boosting converter of fusion coupling inductance technology described in the utility model
Main structure include coupling inductance unit, three-level cells and clamp units, coupling inductance unit include the first coupling inductance,
Second coupling inductance, third coupling inductance, first diode and the second diode, the first coupling inductance, the second coupling inductance,
Three coupling inductances are mutually coupled, and turn ratio is 1:n:n, and the anode of the Same Name of Ends connection power supply of the first coupling inductance is non-of the same name
End is connected with one end of the drain electrode of first switch tube and the first storage capacitor respectively；The Same Name of Ends of second coupling inductance is respectively with
The anode connection of the other end of one storage capacitor, one end of energy storage inductor and the first clamp diode, non-same polarity and first
The anode connection of diode；The Same Name of Ends of the third coupling inductance cathode with the cathode of the second output capacitance, output loading respectively
With the anode connection of the second clamp diode, non-same polarity is connected with the second diode；Three-level cells include first switch
Pipe, second switch, the first storage capacitor, the second storage capacitor, the first output capacitance, the second output capacitance are connected with midpoint
Line；The drain electrode of first switch tube is connected with the non-same polarity of the first inductance and the first storage capacitor respectively, the source of second switch
Pole is connected with the cathode of power supply and the second storage capacitor respectively, and the cathode of the first clamp diode is negative with first diode respectively
Pole, the anode of the first output capacitance, output loading anode connection, the cathode of the second clamp diode respectively with the second diode
Cathode, energy storage inductor and the connection of the second storage capacitor, the source electrode of first switch tube is connected with the drain electrode of second switch, and
It is connected together with the anode of the cathode of the first output capacitance and the second output capacitance by midpoint connecting line, the first output capacitance, the
Two output capacitances are able to achieve the function that energy storage is pressed；Clamp units include the first clamp diode and the second clamp diode, the
The anode of one clamp diode is connect with the Same Name of Ends of the second coupling inductance, the first storage capacitor and energy storage inductor respectively, is born
Pole is connect with the anode of the anode of the first output capacitance and output loading respectively；Second clamp diode anode respectively with third
The Same Name of Ends of coupling inductance, the cathode of the second output capacitance are connected with the cathode of output loading, cathode and the second diode
Cathode, energy storage inductor the other end connect with the second storage capacitor.
First switch tube described in the utility model, second switch are all made of the metal-oxide-semiconductor of N-channel, and its grid source electrode is equal
It can receive the control signal of external piloting control chip.
The utility model reaches the state of on or off, energy using unipolar PWM control method come control switch pipe
The working efficiency for enough improving switching tube, reduces switching loss；In terms of driving signal, the identical driving letter of high level ratio is selected
Number, and a driving signal postpones half period than another driving signal, and conducting dutycycle D > 0.5, is realized with this
The state be connected is presented working normally at least one in two switching tubes in the period.
The utility model compared with prior art, in normal work, does not stop switched conductive or shutdown by two switching tubes
State, the process of the continuous charge and discharge of coupling inductance is realized with this, the function of high voltage gain is realized with this；Utilize three electricity
Flat structure can control overall cost and reality so that the stress of the devices such as switching tube, diode and capacitor all accordingly reduces half
The difficulty applied；Corresponding clamp units are added, can effectively clamp the due to voltage spikes due to leakage inductance energy bring switching tube, reduce
Loss, and can effectively guide its energy to rear class outlet side；Its structure is simple, easy to use, at low cost, output effect
Rate is high, can achieve 90% overall efficiency.
Detailed description of the invention:
Fig. 1 is the main body circuit structural schematic diagram of the utility model.
Fig. 2 is the schematic diagram of two switch controlled signals described in the utility model.
Fig. 3 (a)~(d) is the schematic diagram of 4 kinds of operating modes of the utility model.
Fig. 4 is the voltage gain contrast curve chart of the utility model and tradition Sepic circuit.
Specific embodiment:
In order to more specifically describe the present invention, with reference to the accompanying drawing and specific embodiment is to the technology of the utility model
Scheme is described in detail.
Embodiment:
Main structure such as Fig. 1 institute of the direct current tri-lever boosting converter of coupling inductance technology is merged described in the present embodiment
Show, including coupling inductance unit, three-level cells and clamp units, wherein coupling inductance unit is for substituting in original converter
Single energy storage inductor, using coupling inductance simultaneously charge and discharge the characteristics of, former converter only have this adjusting of duty ratio D because
On the basis of son, increase this adjustable free factor of turn ratio, realizes the function of high voltage transfer capability, specifically include
First coupling inductance L1, the second coupling inductance L2, third coupling inductance L3, first diode D1With the second diode D2, the first coupling
Close inductance L1, the second coupling inductance L2, third coupling inductance L3It is mutually coupled, and turn ratio is 1:n:n, the first coupling inductance L1
Same Name of Ends connect power supply VgAnode, non-same polarity respectively with first switch tube S1Drain electrode and the first storage capacitor C1One
End is connected；Second coupling inductance L2Same Name of Ends respectively with the first storage capacitor C1The other end, energy storage inductor L one end and
One clamp diode D3Anode connection, non-same polarity and first diode D1Anode connection；Third coupling inductance L3It is same
Name end respectively with the second output capacitance C4Cathode, output loading R cathode and the second clamp diode D4Anode connection,
Non-same polarity and the second diode D2It is connected；Three-level cells may be implemented to become two full symmetric portions in transformer configuration
Point, to reduce the voltage stress of the elements such as switching tube, diode and capacitor；Specifically include first switch tube S1, second switch
S2, the first storage capacitor C1, the second storage capacitor C2, the first output capacitance C3, the second output capacitance C4With midpoint connecting line, first
Switching tube S1Drain electrode respectively with the first inductance L1Non-same polarity and the first storage capacitor C1It is connected, second switch S2Source
Pole respectively with power supply VgCathode and the second storage capacitor C2It is connected, the first clamp diode D3Cathode respectively with the one or two pole
Pipe D1Cathode, the first output capacitance C3Anode, output loading R anode connection, the second clamp diode D4Cathode difference
With the second diode D2Cathode, energy storage inductor L and the second storage capacitor C2Connection, first switch tube S1Source electrode and second open
Close pipe S2Drain electrode be connected, and with the first output capacitance C3Cathode and the second output capacitance C4Anode by midpoint connecting line
It connects together, first switch tube S1With second switch S2Control signal of the grid source electrode to receive external piloting control chip, complete
The switching of switching tube on or off state；Voltage point when clamp units can discharge the leakage inductance of respective corresponding coupling inductance
Peak is clamped to a fixed numbers, and energy is guided to outlet side, to reduce loss, the whole efficiency of Lifting Transform device, tool
Body includes the first clamp diode D3With the second clamp diode D4, the first clamp diode D3Anode coupled respectively with second
Inductance L2Same Name of Ends, the first storage capacitor C1Connected with energy storage inductor L, cathode respectively with the first output capacitance C3Anode
With the anode connection of output loading R；Second clamp diode D4Anode respectively with the Same Name of Ends of third coupling inductance, second defeated
Capacitor C out4Cathode connected with the cathode of output loading R, cathode and the second diode D2Cathode, energy storage inductor L it is another
End and the second storage capacitor C2Connection.
The schematic diagram of the described two switch controlled signals of the present embodiment is as shown in Fig. 2, using unipolar PWM controlling party
The state that method is on or is ended with control switch pipe can be improved the working efficiency of switching tube in this way, reduce switching loss.
In terms of driving signal, the identical driving signal of high level ratio is selected, and a driving signal is than another driving signal
Than postponing half period, and conducting dutycycle D > 0.5 is being worked normally in the period in two switching tubes at least with this to realize
One is presented the state of conducting.
This implementation converter is primarily present four as shown in Fig. 3 (a)~(d) within a normal steady-state period
Kind operating mode, as first switch tube S1With second switch S2It is at this time operating mode 1 (Fig. 3 (a)) when being both turned on, four two
Pole pipe is turned off, and main there are three circuits: one is direct-current input power supplying VgFor the first coupling inductance L1Charging, secondly being first
Storage capacitor C1, the second storage capacitor C2Electric discharge, while charging for energy storage inductor L, thirdly being the first output capacitance C3It is defeated with second
Capacitor C out4Energy is supplied to output end；As first switch tube S1Conducting, second switch S2It is at this time operating mode 2 when cut-off
(Fig. 3 (b)), in the moment that this operating mode starts, is the second clamp first due to the presence of coupling inductance unit leakage inductance energy
Diode D4ON operation carries out voltage clamp, then the most of the time hereafter, the second diode D2Normally work, electricity
Source VgFor the first coupling inductance L1With third coupling inductance L3Charging, is also the second storage capacitor C2With the second output capacitance C4It fills
Electricity, storage capacitor C1Electric discharge is remaining energy-storage travelling wave tube energy storage inductor L, the second output capacitance C in circuit4, the second storage capacitor C2
With the third coupling inductance L in coupling winding element3Charging, output capacitance C3Electric discharge provides energy for load；Then work is carried out
The operation of operation mode 3 (Fig. 3 (c)), at this time first switch tube S1With second switch S2The state simultaneously turned on is returned to once more,
It is identical with operating mode 1；As first switch tube S1Cut-off, second switch S2It is at this time 4 (Fig. 3 of operating mode when conducting
(d)), also due to the presence of coupling inductance unit leakage inductance energy in the moment that this operating mode starts is the first clamp first
Diode D3ON operation carries out voltage clamp, then the most of the time hereafter, first diode D1Normally work, electricity
Source VgFor the first coupling inductance L1With the second coupling inductance L2Charging, is also the first storage capacitor C1With the first output capacitance C3It fills
Electricity；Second storage capacitor C2Electric discharge is remaining energy-storage travelling wave tube energy storage inductor L, the first output capacitance C in circuit3, the first energy storage electricity
Hold C1With the second coupling inductance L in coupling winding element2Charging；Second output capacitance C4Electric discharge provides energy for load R,
In entire steady-state period, full symmetric characteristic is presented in converter, and overall process is easy to control and implements.
Converter described in the present embodiment is compared with conventional topologies, and voltage gain correlation curve is as shown in Figure 4.When requiring
When output voltage is converted to 10 times of input voltage, if the output voltage according to existing underlying topology expresses Formula Vo=DVg/(1-
D), the 10 times of voltage gains that reach requirement, need its dutyfactor value 0.91 or so, switching tube has been in limit shape at this time
State influences whole work efficiency, and can generate biggish damage to related device, is easy to appear safety problem；The present embodiment
The expression formula of converter input and output voltage relationship is Vo=(2nD+D-n) * Vg/ (1-D), the 10 times of voltages that reach requirement increase
Benefit, when coupling umber of turn ratio n=3, duty ratio need to only reach 0.76 or so, and with coupling umber of turn ratio
Raising, the size of duty ratio can also decrease, and in this way while realizing high voltage gain, avoid switching tube pole
The presence for limiting duty ratio has ensured the overall security of topology.
The present embodiment carries out experimental verification under the requirement that output voltage is 80V, power is 100W, and efficiency can achieve
90%.
Above-mentioned analysis and experimental result significantly promote voltage conversion ratio it can be shown that DC converter of the present invention has
Ability, and the voltage stress of related device can be effectively reduced, greatly reduce loss, improves overall conversion efficiency, very
Rear class DC voltage suitable for grid-connected promotes circuit.
Claims (2)
1. a kind of direct current tri-lever boosting converter for merging coupling inductance technology, it is characterised in that main structure includes coupling electricity
Feel unit, three-level cells and clamp units, coupling inductance unit includes the first coupling inductance, the second coupling inductance, third coupling
Inductance, first diode and the second diode, the first coupling inductance, the second coupling inductance, third coupling inductance is closed to be mutually coupled,
And turn ratio be 1:n:n, the first coupling inductance Same Name of Ends connection power supply anode, non-same polarity respectively with first switch tube
Drain electrode is connected with one end of the first storage capacitor；The Same Name of Ends of second coupling inductance respectively with the other end of the first storage capacitor,
The anode of the anode connection of one end of energy storage inductor and the first clamp diode, non-same polarity and first diode connects；The
The Same Name of Ends of three coupling inductances respectively with the cathode of the second output capacitance, the cathode of output loading and the second clamp diode just
Pole connection, non-same polarity are connected with the second diode；Three-level cells include first switch tube, second switch, the first storage
It can capacitor, the second storage capacitor, the first output capacitance, the second output capacitance and midpoint connecting line；The drain electrode of first switch tube point
Be not connected with the non-same polarity of the first inductance and the first storage capacitor, the source electrode of second switch respectively with the cathode of power supply and
Two storage capacitors be connected, the cathode of the first clamp diode respectively with the cathode of first diode, the first output capacitance anode,
Output loading anode connection, the cathode of the second clamp diode respectively with the cathode of the second diode, energy storage inductor and second
Storage capacitor connection, the source electrode of first switch tube is connected with the drain electrode of second switch, and the cathode with the first output capacitance
And second output capacitance anode connected together by midpoint connecting line, the first output capacitance, the second output capacitance are able to achieve energy storage
The function of pressing；Clamp units include the first clamp diode and the second clamp diode, the anode point of the first clamp diode
Do not connect with the Same Name of Ends of the second coupling inductance, the first storage capacitor and energy storage inductor, cathode respectively with the first output capacitance
Anode and output loading anode connection；The anode of second clamp diode respectively with the Same Name of Ends of third coupling inductance, the
The cathode of two output capacitances is connected with the cathode of output loading, the cathode of cathode and the second diode, energy storage inductor it is another
End is connect with the second storage capacitor.
2. merging the direct current tri-lever boosting converter of coupling inductance technology according to claim 1, it is characterised in that described
First switch tube, second switch are all made of the metal-oxide-semiconductor of N-channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822140256.9U CN209200934U (en) | 2018-12-19 | 2018-12-19 | A kind of direct current tri-lever boosting converter merging coupling inductance technology |
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| CN201822140256.9U CN209200934U (en) | 2018-12-19 | 2018-12-19 | A kind of direct current tri-lever boosting converter merging coupling inductance technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560702A (en) * | 2018-12-19 | 2019-04-02 | 青岛理工大学 | A kind of direct current tri-lever boosting converter merging coupling inductance technology |
| CN111817551A (en) * | 2020-06-01 | 2020-10-23 | 湖南大学 | Low EMI three-level DC converter |
-
2018
- 2018-12-19 CN CN201822140256.9U patent/CN209200934U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560702A (en) * | 2018-12-19 | 2019-04-02 | 青岛理工大学 | A kind of direct current tri-lever boosting converter merging coupling inductance technology |
| CN109560702B (en) * | 2018-12-19 | 2024-03-22 | 南京信息工程大学 | DC three-level boost converter integrating coupling inductance technology |
| CN111817551A (en) * | 2020-06-01 | 2020-10-23 | 湖南大学 | Low EMI three-level DC converter |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190802 Termination date: 20211219 |