CN106655761B - A kind of high gain boost DC converter - Google Patents
A kind of high gain boost DC converter Download PDFInfo
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- CN106655761B CN106655761B CN201710033130.9A CN201710033130A CN106655761B CN 106655761 B CN106655761 B CN 106655761B CN 201710033130 A CN201710033130 A CN 201710033130A CN 106655761 B CN106655761 B CN 106655761B
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- 239000003990 capacitor Substances 0.000 claims abstract description 76
- 230000005611 electricity Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 13
- 238000005859 coupling reaction Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
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- 238000004146 energy storage Methods 0.000 description 1
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Classifications
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/0077—Plural converter units whose outputs are connected in series
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Abstract
The invention discloses a kind of high gain boost DC converters, including DC voltage source, controllable switch, load and n capacitance-inductance-diode CLD unit；The first end of capacitor in each CLD unit and the first end of inductance connect, and the second end of inductance is connect with the anode of the anode of first diode and the second diode respectively, and the cathode of the second diode and the second end of capacitor connect；The cathode of each first diode is connect with the first end of controllable switch；Each capacitor series connection；The anode of DC voltage source is connect with the first end of the capacitor in the 1st CLD unit, its cathode is connect with the second end of the first end of load and controllable switch respectively, the second end of load is connect with the second end of the capacitor of n-th of CLD unit, and the control of controllable switch terminates pulse signal；The voltage gain of the converter is 1/ (1-d)n, wherein d is the conducting dutycycle of controllable switch.Circuit structure of the invention is simple, flexible, it is easy to accomplish.
Description
Technical field
The present invention relates to DC converter technical fields, more particularly to a kind of high gain boost DC converter.
Background technique
With the development of photovoltaic power generation and battery energy storage system and universal, the application of high gain boost DC converter is more next
It is more extensive.Currently, common high gain boost DC converter is realized using coupling inductance, still, due to coupling
Inductance is difficult to control in terms of leakage inductance and resistance loss, so that the design of coupling inductance is complicated, and when the original of coupling inductance is secondary
When coil turn ratio with higher, the design of coupling inductance can be more complicated.
Fig. 1 is please referred to, Fig. 1 is a kind of existing structural schematic diagram of the high-gain DC converter with coupling inductance.It is existing
Have and uses coupling inductance, inductance coil L in the high-gain DC converter in technology1With inductance coil Lr, and the high-gain
The voltage gain of DC converter is 2 (2+N)/(1-d)2, wherein N is the secondary side (n of coupling inductance2) and primary side (n1) the number of turns
Than d is the conducting dutycycle of controllable switch Q.It can be seen from the above, when one timing of conducting dutycycle of switching tube Q, in the prior art
High-gain DC converter voltage gain it is related with the turn ratio of former secondary coil of coupling inductance, and according to coupling inductance sheet
Its higher design of turn ratio of the former secondary coil of coupling inductance is more complicated known to the shortcomings that body, and because coupling inductance, inductance
Coil L1With inductance coil LrType difference make circuit design more complicated, it is straight to eventually lead to high-gain in the prior art
The circuit structure of current converter is complicated, is not easy to realize.
Therefore, the high gain boost DC converter for how providing a kind of solution above-mentioned technical problem becomes the skill of this field
Art personnel's problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of high gain boost DC converter, the present invention makes circuit structure modularization
The structure of circuit is simple, flexible, it is easy to accomplish.
In order to solve the above technical problems, the present invention provides a kind of high gain boost DC converter, including DC voltage
Source, controllable switch, load and n capacitance-inductance-diode, i.e. CLD unit, n are the integer not less than 2, Mei Gesuo
Stating CLD unit includes capacitor, inductance, first diode and the second diode, in which:
The first end of the capacitor in each CLD unit is connect with the first end of the inductance, the inductance
Second end is connect with the anode of the anode of the first diode and second diode respectively, the yin of second diode
Pole is connect with the second end of the capacitor；The cathode of each first diode in each CLD unit simultaneously with institute
State the first end connection of controllable switch；Each capacitor series connection in each CLD unit；The DC voltage source is just
Pole is connect with the first end of the capacitor in the 1st CLD unit, and the cathode of the DC voltage source is born with described respectively
The first end of load is connected with the second end of the controllable switch, and the second end of the load is described with n-th CLD unit
The second end of capacitor connects, and the control of the controllable switch terminates pulse signal；The electricity of the high gain boost DC converter
Pressure gain is 1/ (1-d)n, wherein d is the conducting dutycycle of the controllable switch.
Preferably, the controllable switch is NMOS, and first end of the drain electrode of the NMOS as the controllable switch is described
Second end of the source electrode of NMOS as the controllable switch, control terminal of the grid of the NMOS as the controllable switch.
Preferably, the controllable switch is PMOS, and first end of the source electrode of the PMOS as the controllable switch is described
Second end of the drain electrode of PMOS as the controllable switch, control terminal of the grid of the PMOS as the controllable switch.
Preferably, each capacitor in each CLD unit is the different capacitor of capacitance.
Preferably, the capacitance of the capacitor in the 1st CLD unit is maximum, and pressure voltage is minimum；N-th of CLD is mono-
The capacitance of capacitor in member is minimum, and pressure voltage is maximum.
Preferably, each inductance in each CLD unit works in continuous current mode.
Preferably, inductance described in one or more of each described inductance in each CLD unit works in electricity
Flow discontinuous mode.
Preferably, each inductance in each CLD unit works in discontinuous conduct mode.
Preferably, high gain boost DC converter as described above, the n are 3.
The present invention provides a kind of high gain boost DC converter, including DC voltage source, controllable switch, load and
N CLD unit, n are the integer not less than 2, and each CLD unit includes capacitor, inductance, first diode and the two or two pole
Pipe, wherein the first end of the capacitor in each CLD unit and the first end of inductance connect, and the second end of inductance is respectively with first
The connection of the anode of the anode of diode and the second diode, the cathode of the second diode and the second end of capacitor connect；Each CLD
The cathode of each first diode in unit is connect with the first end of controllable switch simultaneously；Each electricity in each CLD unit
Hold series connection；The anode of DC voltage source is connect with the cathode of the capacitor in the 1st CLD unit, the cathode difference of DC voltage source
It is connect with the second end of the first end of load and controllable switch, the anode of the capacitor of the second end of load and n-th of CLD unit is even
It connects, the control of controllable switch terminates pulse signal；The voltage gain of the high gain boost DC converter is 1/ (1-d)n,
In, d is the conducting dutycycle of the controllable switch.
The structure type of n CLD unit in the present invention is identical, the inductance, first diode in each CLD unit and
Two diodes for changing corresponding capacitor voltage, and in each CLD unit capacitor series connection after with DC voltage subject string
Connection, makes the sum of voltage and voltage of DC voltage source of each capacitor of the output voltage of the high gain boost DC converter,
And the voltage gain of the high gain boost DC converter is 1/ (1-d)n, it is seen that when the conducting dutycycle of controllable switch is certain
When, the voltage gain of high gain boost DC converter provided by the present invention and the number n of CLD unit are related, can basis
Actual conditions flexibly set the specific value of n.High gain boost DC converter provided by the present invention is realizing high-gain
On the basis of boosting, by circuit structure modularization, keep the structure of circuit simple, flexible, it is easy to accomplish.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of existing structural schematic diagram of the high-gain DC converter with coupling inductance；
Fig. 2 is a kind of structural schematic diagram of high gain boost DC converter provided by the present invention；
Fig. 3 is that the inductance in high gain boost DC converter provided by the present invention works under continuous current mode
Critical current waveform diagram；
Fig. 4 is a kind of Working mould of the high gain boost DC converter provided by the present invention when controllable switch is connected
State；
Fig. 5 is a kind of high gain boost DC converter provided by the present invention in controllable switch shutdown and all inductance works
Make the operation mode under continuous current mode；
Fig. 6 is that some inductance in high gain boost DC converter provided by the present invention works in discontinuous current mould
Critical current waveform diagram under formula；
Fig. 7 is that a kind of high gain boost DC converter provided by the present invention is turned off in controllable switch and only one is electric
Feel operation mode of the work under discontinuous conduct mode；
Fig. 8 is that a kind of high gain boost DC converter provided by the present invention is turned off in controllable switch and all inductance are equal
Work the operation mode under discontinuous conduct mode.
Specific embodiment
Core of the invention is to provide a kind of high gain boost DC converter, and the present invention makes circuit structure modularization
The structure of circuit is simple, flexible, it is easy to accomplish.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to figure 2., Fig. 2 is a kind of structural schematic diagram of high gain boost DC converter provided by the present invention.It should
High gain boost DC converter includes DC voltage source 1, controllable switch 2, load 3 and n CLD unit 4, and n is not less than 2
Integer, each CLD unit 4 include capacitor 41, inductance 42, first diode 43 and the second diode 44, in which:
The first end of capacitor 41 in each CLD unit 4 is connect with the first end of inductance 42, the second end difference of inductance 42
It is connect with the anode of the anode of first diode 43 and the second diode 44, the cathode of the second diode 44 and the second of capacitor 41
End connection；The cathode of each first diode 43 in each CLD unit 4 is connect with the first end of controllable switch 2 simultaneously；It is each
Each capacitor 41 in CLD unit 4 is connected；The first end of the anode of DC voltage source 1 and the capacitor 41 in the 1st CLD unit
Connection, the cathode of DC voltage source 1 are connect with the second end of the first end of load 3 and controllable switch 2 respectively, load the second of 3
End is connect with the second end of the capacitor 41 of n-th of CLD unit, and the control of controllable switch 2 terminates pulse signal；The high-gain liter
The voltage gain of straightening current converter is 1/ (1-d)n, wherein d is the conducting dutycycle of the controllable switch 2.
Specifically, as shown in Fig. 2, in high gain boost DC converter provided by the present invention include n CLD unit 4,
And the structure of each CLD unit 4 is identical with type.Inductance 42, first diode 43 and the two or two in each CLD unit 4
Pole pipe 44 for changing corresponding capacitor 41 voltage, and capacitor 41 in each CLD unit 4 connect after with DC voltage source
1 series connection, makes the output voltage V of the high gain boost DC converter0For the voltage of each capacitor 41 and the electricity of DC voltage source 1
The sum of pressure, and the voltage gain of the high gain boost DC converter is 1/ (1-d)n, it is seen that when the conducting of controllable switch 2 accounts for
For sky than a timing, the voltage gain of high gain boost DC converter provided by the present invention and the number n of CLD unit 4 are related,
And the voltage gain of the bigger high gain boost DC converter of n is also bigger, and wherein the specific value of n can be according to reality
Depending on situation, so that the structure of high gain boost DC converter is more flexible.
It should be noted that pulse signal is used to control the conducting and shutdown of controllable switch 2, when controllable switch 2 is connected,
First diode 43 in each CLD unit 4 is both turned on, and the second diode 44 is turned off, at this time the electricity in each CLD unit 4
The electric current of sense 42 increases.Assuming that a CLD unit 4 in n CLD unit 4 is k-th of CLD unit (as intermediate in Fig. 2
Shown in CLD unit), then the capacitor 41 in k-th of CLD unit is mono- to n-th of CLD to load 3 and+1 CLD unit of kth simultaneously
Inductance 42 in member is powered, and wherein k is greater than 1 and is less than or equal to n；When controllable switch 2 turns off, in each CLD unit 4 the one or two
Pole pipe 43 is turned off, operating mode on or off of second diode 44 according to its corresponding inductance 42, and when second
When diode 44 is connected, the inductance 42 in each CLD unit 4 gives corresponding capacitor 41 by corresponding second diode 44 simultaneously
It powers with load 3, the electric current linear decline in inductance 42.
Preferably, controllable switch 2 is NMOS 21, first end of the drain electrode of NMOS 21 as controllable switch 2, NMOS
Second end of 21 source electrode as controllable switch 2, control terminal of the grid of NMOS 21 as controllable switch 2.
Specifically, the controllable switch 2 in high gain boost DC converter in the application is preferably NMOS 21, when
So, it is not limited only to using NMOS 21, other kinds of controllable switch 2 can also be used, the present invention does not do special limit herein
It is fixed.
It should be noted that one kind is operate on continuous current mode there are two types of the operating modes of inductance 42, another kind is
Work in discontinuous conduct mode.
Preferably, each inductance 42 in each CLD unit 4 works in continuous current mode.
Referring to figure 3., Fig. 3 is that the inductance work in high gain boost DC converter provided by the present invention connects in electric current
Critical current waveform diagram under Discontinuous Conduction mode.All inductance 42 in each CLD unit 4 work in continuous current mode, then Fig. 6
In vgsFor pulse signal, i41For the electric current of each capacitor 41, i42For the electric current of each inductance 42, i43For each one or two pole
The electric current of pipe 43, i44For the electric current of each second diode 44, isFor the electric current in NMOS 21 (controllable switch 2), the electric current etc.
In the sum of the electric current of each inductance 42.
As shown in figure 3, in t0~t1Stage, pulse signal vgsFor high level, so when NMOS 21 be connected, each CLD is mono-
First diode 43 in member 4 is both turned on, and the second diode 44 is turned off (i44Electric current be zero).At this time in each CLD unit 4
Inductance 42 electric current (i42) increase, and the electric current (i of first diode 4343) and 42 electric current (i of inductance42) identical.Assuming that
A CLD unit 4 in n CLD unit 4 is k-th of CLD unit, then the capacitor 41 in k-th of CLD unit is simultaneously to load 3
It powers with inductance 42 of+1 CLD unit of kth into n-th of CLD unit, wherein k is greater than 1 and is less than or equal to n；In NMOS 21
Electric current (i2) it is the sum of all 42 electric currents of inductance in n CLD unit 4, the operation mode of high gain boost DC converter at this time
As shown in figure 4, i.e. Fig. 4 is a kind of work of the high gain boost DC converter provided by the present invention when controllable switch is connected
Mode.As shown in Figure 4, wherein solid line indicates that access, dotted line indicate open circuit, I0For the electric current in load 3, iL1For the 1st CLD
The electric current of inductance 42 in unit, iLkFor the electric current of the inductance 42 in k-th of CLD unit, iLnFor the electricity in n-th of CLD unit
The electric current of sense 42.
In t1~t2Stage, pulse signal vgsFor low level, so when NMOS 21 end, the in each CLD unit 4
One diode 43 is turned off, and the second diode 44 is both turned on, and inductance 42 is by corresponding second diode 44 simultaneously to corresponding
Capacitor 41 and load 3 are powered, at this time electric current (the i in inductance 4242) linear decline, and before controllable switch 2 is connected again
Electric current in inductance 42 can't drop to zero, so when each second diode 44 it is constantly on, until controllable switch 2 again
Secondary conducting, the operation mode of high gain boost DC converter is as shown in figure 5, i.e. Fig. 5 is one kind provided by the present invention at this time
Operation mode of the high gain boost DC converter in controllable switch shutdown and the work of all inductance under continuous current mode.Such as
Shown in Fig. 5, wherein solid line indicates that access, dotted line indicate open circuit, I0For the electric current in load 3, iL1For in the 1st CLD unit
The electric current of inductance 42, iLkFor the electric current of the inductance 42 in k-th of CLD unit, iLnFor the electricity of the inductance 42 in n-th of CLD unit
Stream.
Preferably, to work in electric current disconnected for one or more inductance 42 in each inductance 42 in each CLD unit 4
Discontinuous Conduction mode.
Fig. 6 is please referred to, Fig. 6 is that some inductance in high gain boost DC converter provided by the present invention works in
Critical current waveform diagram under discontinuous conduct mode.Inductance 42 in a certain CLD unit 4 works in discontinuous conduct mode, then Fig. 6
In vgsFor pulse signal, i41' be the CLD unit 4 in capacitor 41 electric current, i42' it is inductance 42 in the CLD unit
Electric current, i43' be the CLD unit 4 in first diode 43 electric current, i44' it is second diode 44 in the CLD unit 4
Electric current, isFor the electric current in NMOS 21 (controllable switch 2), which is equal to the electricity of each inductance 42 in each CLD unit 4
The sum of stream.
It should be noted that when thering is the inductance 42 of a CLD unit 4 to work in discontinuous conduct mode in n CLD unit 4
When, such as inductance 42 in k-th of CLD unit works in discontinuous conduct mode, and the inductance 42 in other n-1 CLD unit 4
Continuous current mode is worked in, as shown in Figure 6 in t0~t1Stage, pulse signal are high level, and NMOS 21 is connected, at this time
First diode 43 in k-th of CLD unit is connected, the cut-off of the second diode 44, the electric current of the inductance 42 in the CLD unit 4
Start from scratch linear rising, and the capacitor 41 in the CLD unit 4 is simultaneously to load 3 and+1 CLD unit of kth to n-th
The inductance 42 of CLD unit is powered, and each first diode 43 in other n-1 CLD unit 4 is both turned on and each two or two pole
Pipe 44 is turned off, the linear rise since a certain value of the electric current in each inductance 42, at this point, high gain boost DC converter
Operation mode is still as shown in Figure 4；In t1~t2Stage, pulse signal are low level, and NMOS 21 is turned off, at this point, k-th of CLD
First diode 43 in unit is ended, the conducting of the second diode 44, and the inductance 42 in the CLD unit 4 is through the two or two pole
Pipe 44 to the capacitor 41 in the CLD unit 4 and loads 3 power supplies simultaneously, and the electric current linear decline in the inductance 42 is until drop to
The second diode 44 cut-off until zero, and when the electric current in the inductance 42 drops to zero in the CLD unit 4, in t2~t3
The electric current in stage, the inductance 42 in k-th of CLD unit is still zero, and the first diode 43 in the CLD unit 4 at this time
It is turned off with the second diode 44, the capacitor 41 in the CLD unit 4 is 3 power supply of load；In t1~t3Stage, NMOS 21 are turned off
When, the cut-off of each first diode 43, the conducting of each second diode 44 in other n-1 CLD units 4, and it is each
The electric current of inductance 42 claims linear decline, and the electric current before controllable switch 2 is connected again in inductance 42 can't drop to
Zero.It can be seen from the above, in t1~t2The operation mode in stage, high gain boost DC converter is still as shown in Figure 5；In t2~
t3In the stage, the operation mode of high gain boost DC converter is as shown in fig. 7, Fig. 7 is a kind of high-gain provided by the present invention
Operation mode of the voltage boosting dc converter in controllable switch shutdown and the work of only one inductance under discontinuous conduct mode.
It should also be noted that, only being listed in the application when the inductance 42 in only one CLD unit 4 works in electric current
The operation mode of high gain boost DC converter when under discontinuous mode.Certainly, inductance 42 is worked under discontinuous conduct mode not
It is only limitted to one, can also be multiple, the present invention does not do special restriction herein, is able to achieve the purpose of the present invention.
Preferably, each inductance 42 in each CLD unit 4 works in discontinuous conduct mode.
It should be noted that when each inductance 42 in n CLD unit 4 works in discontinuous conduct mode, such as Fig. 6
It is shown in t0~t1Stage, pulse signal are high level, and NMOS 21 is connected, at this time each one or two pole in n CLD unit 4
Pipe 43 is both turned on, and the second diode 44 is turned off, and the electric current in each inductance 42 is started from scratch linear rise, at this point,
The operation mode of high gain boost DC converter is still as shown in Figure 4；In t1~t2Stage, pulse signal are low level, NMOS
21 shutdowns, each first diode 43 in n CLD unit 4 is ended at this time, and each second diode 44 is connected, and each
Inductance 42 is through corresponding second diode 44 simultaneously to 3 power supply of capacitor 41 and load in corresponding CLD unit 4, each inductance
Electric current linear decline in 42 is until dropping to zero, and the CLD unit 4 when the electric current in the inductance 42 drops to zero
In the cut-off of the second diode 44, the operation mode of this stage high gain boost DC converter is still as shown in Figure 5；In t2~
t3The electric current in stage, the inductance 42 in each CLD unit 4 is still zero, and each first in each CLD unit 4 at this time
Diode 43 and each second diode 44 are turned off, and each capacitor 41 in each CLD unit 4 is 3 power supply of load, this stage
The operation mode of high gain boost DC converter is as shown in figure 8, Fig. 8 is a kind of high gain boost direct current provided by the present invention
Converter is in the operation mode that controllable switch turns off and all inductance work under discontinuous conduct mode.
Preferably, controllable switch 2 is PMOS, first end of the source electrode of PMOS as controllable switch 2, the drain electrode of PMOS
As the second end of controllable switch 2, control terminal of the grid of PMOS as controllable switch 2.
It should be noted that the controllable switch 2 in the present invention not only can also use PMOS using NMOS 21.When
So, other kinds of controllable switch 2, such as triode, the present invention can also be used not to do special restriction herein, is able to achieve this
The purpose of invention.
Preferably, each capacitor 41 in each CLD unit 4 is the different capacitor 41 of capacitance.
It should be noted that can choose capacitance different for each capacitor 41 in each CLD unit 4 in practical applications
Capacitor, naturally it is also possible to select the identical capacitor of capacitance, the present invention does not do special restriction herein, is able to achieve the purpose of the present invention
?.
Preferably, the capacitance of the capacitor 41 in the 1st CLD unit is maximum, pressure voltage is minimum；Then, n-th of CLD
The capacitance of capacitor 41 in unit is minimum, and pressure voltage is maximum.
It should be noted that each capacitor 41 in the present invention is preferably the different capacitor 41 of capacitance, due in the present invention
Output voltage V0The main voltage according to the capacitor 41 in n-th of CLD unit, therefore the pressure resistance of the capacitor 41 in n-th of CLD unit
Value application is the largest, and capacitance can be the smallest, and the capacitance of the capacitor 41 in the 1st CLD unit is maximum, and pressure voltage is most
It is low, and be gradually increased from the pressure voltage of the capacitor 41 in 41 to the n-th CLD unit of capacitor in the 1st CLD unit, capacitance
It is gradually reduced.
Preferably, high gain boost DC converter as above, n 3.
Certainly, n not only can be 3, can also determine according to the actual situation for other numerical value, the specific value of n,
The present invention does not do special restriction herein, is able to achieve the purpose of the present invention.
The present invention provides a kind of high gain boost DC converter, including DC voltage source, controllable switch, load and
N CLD unit, n are the integer not less than 2, and each CLD unit includes capacitor, inductance, first diode and the two or two pole
Pipe, wherein the first end of the capacitor in each CLD unit and the first end of inductance connect, and the second end of inductance is respectively with first
The connection of the anode of the anode of diode and the second diode, the cathode of the second diode and the second end of capacitor connect；Each CLD
The cathode of each first diode in unit is connect with the first end of controllable switch simultaneously；Each electricity in each CLD unit
Hold series connection；The anode of DC voltage source is connect with the cathode of the capacitor in the 1st CLD unit, the cathode difference of DC voltage source
It is connect with the second end of the first end of load and controllable switch, the anode of the capacitor of the second end of load and n-th of CLD unit is even
It connects, the control of controllable switch terminates pulse signal；The voltage gain of the high gain boost DC converter is 1/ (1-d)n,
In, d is the conducting dutycycle of the controllable switch.
The structure type of n CLD unit in the present invention is identical, the inductance, first diode in each CLD unit and
Two diodes for changing corresponding capacitor voltage, and in each CLD unit capacitor series connection after with DC voltage subject string
Connection, makes the sum of voltage and voltage of DC voltage source of each capacitor of the output voltage of the high gain boost DC converter,
And the voltage gain of the high gain boost DC converter is 1/ (1-d)n, it is seen that when the conducting dutycycle of controllable switch is certain
When, the voltage gain of high gain boost DC converter provided by the present invention and the number n of CLD unit are related, can basis
Actual conditions flexibly set the specific value of n.High gain boost DC converter provided by the present invention is realizing high-gain
On the basis of boosting, by circuit structure modularization, keep the structure of circuit simple, flexible, it is easy to accomplish.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
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 (9)
1. a kind of high gain boost DC converter, which is characterized in that including DC voltage source, controllable switch, load and n
Capacitance-inductance-diode, i.e. CLD unit, n are the integer not less than 2, and each CLD unit includes capacitor, electricity
Sense, first diode and the second diode, in which:
The first end of the capacitor in each CLD unit is connect with the first end of the inductance, and the second of the inductance
End connect respectively with the anode of the anode of the first diode and second diode, the cathode of second diode and
The second end of the capacitor connects；The cathode of each first diode in each CLD unit simultaneously with it is described can
The first end connection of control switch；Each capacitor series connection in each CLD unit；The DC voltage source anode with
The first end of the capacitor in the 1st CLD unit connects, the cathode of the DC voltage source respectively with the load
First end is connected with the second end of the controllable switch, the capacitor of the second end of the load and n-th of CLD unit
Second end connection, the control of the controllable switch terminates pulse signal；The voltage of the high gain boost DC converter increases
Benefit is 1/ (1-d)n, wherein d is the conducting dutycycle of the controllable switch；
Wherein, each capacitor series aiding connection.
2. high gain boost DC converter according to claim 1, which is characterized in that the controllable switch is NMOS,
First end of the drain electrode as the controllable switch of the NMOS, the source electrode of the NMOS as the controllable switch second
End, control terminal of the grid of the NMOS as the controllable switch.
3. high gain boost DC converter according to claim 1, which is characterized in that the controllable switch is PMOS,
First end of the source electrode of the PMOS as the controllable switch, second to drain as the controllable switch of the PMOS
End, control terminal of the grid of the PMOS as the controllable switch.
4. high gain boost DC converter according to claim 1, which is characterized in that in each CLD unit
Each capacitor is the different capacitor of capacitance.
5. high gain boost DC converter according to claim 4, which is characterized in that in the 1st CLD unit
The capacitance of capacitor is maximum, and pressure voltage is minimum；The capacitance of capacitor in n-th of CLD unit is minimum, and pressure voltage is maximum.
6. high gain boost DC converter according to claim 5, which is characterized in that in each CLD unit
Each inductance works in continuous current mode.
7. high gain boost DC converter according to claim 5, which is characterized in that in each CLD unit
Inductance described in one or more of each described inductance works in discontinuous conduct mode.
8. high gain boost DC converter according to claim 5, which is characterized in that in each CLD unit
Each inductance works in discontinuous conduct mode.
9. high gain boost DC converter according to any one of claims 1 to 8, which is characterized in that the n is 3.
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| CN107911018A (en) * | 2017-11-22 | 2018-04-13 | 广东工业大学 | A kind of high-gain pwm converter |
| CN111130343B (en) * | 2020-01-17 | 2021-05-18 | 福州大学 | Dual-input high-boost-ratio direct current converter with pumping capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010014116A1 (en) * | 2008-08-01 | 2010-02-04 | Tigo Energy, Inc. | Step-up converter systems and methods |
| CN104009633A (en) * | 2014-05-07 | 2014-08-27 | 华南理工大学 | Current continuous type high-gain DC-DC converter circuit |
| CN104467414A (en) * | 2014-12-12 | 2015-03-25 | 山东大学 | Power supply-capacitor series connection type DC converter |
| CN105827115A (en) * | 2016-04-25 | 2016-08-03 | 国网北京市电力公司 | Direct current boost circuit, boost method and transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9374016B2 (en) * | 2014-06-24 | 2016-06-21 | Fuji Electric Co., Ltd. | AC-DC converter |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010014116A1 (en) * | 2008-08-01 | 2010-02-04 | Tigo Energy, Inc. | Step-up converter systems and methods |
| CN104009633A (en) * | 2014-05-07 | 2014-08-27 | 华南理工大学 | Current continuous type high-gain DC-DC converter circuit |
| CN104467414A (en) * | 2014-12-12 | 2015-03-25 | 山东大学 | Power supply-capacitor series connection type DC converter |
| CN105827115A (en) * | 2016-04-25 | 2016-08-03 | 国网北京市电力公司 | Direct current boost circuit, boost method and transformer |
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