CN108054919A - A kind of control method of dcdc converter - Google Patents
A kind of control method of dcdc converter Download PDFInfo
- Publication number
- CN108054919A CN108054919A CN201711406133.9A CN201711406133A CN108054919A CN 108054919 A CN108054919 A CN 108054919A CN 201711406133 A CN201711406133 A CN 201711406133A CN 108054919 A CN108054919 A CN 108054919A
- Authority
- CN
- China
- Prior art keywords
- bridge arm
- sequential
- switch pipe
- bridge
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000001939 inductive effect Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 16
- 238000004146 energy storage Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of control methods of dcdc converter, applied to bidirectional DC/DC converter, according to the charging and discharging demand of the first power supply, and first supply voltage and second source voltage relation, the control of different sequential is carried out to dcdc converter, realize two-way changing, and the electric current of overall process inductance is continuous, double conversion can be dropped by realizing that high-voltage bidirectional can rise.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of control method of dcdc converter.
Background technology
DC-DC converter, abbreviation DC-DC converter or dcdc converter are a kind of to change direct current fundamental power supply
For the DC converter of other voltage species, it is widely used in the fields such as solar power generation, uninterruptible power supply.Its operation principle
It is that DC power conversion (is boosted or is depressured) into another DC voltage.
At present, the application of dcdc converter is more and more extensive.Different dcdc converters is converted by simplifying, can be with
It is equivalent to booster type Boost or voltage-dropping type Buck converters.By taking voltage-dropping type Buck converters as an example, usually in full output
During load, dcdc converter works in CCM i.e. continuous current mode.The average current of inductance is the load current exported.When
When load current reduces, the average current of inductance will also decrease；The certain value when load current reduces, converter enter critical electricity
Stream mode.At this point, if load current further reduces, after the electric current of inductance returns to 0, switch periods are not over, due to
The reverse blocking effect of diode, the electric current of inductance keep a period of time at 0 value, and then switch periods terminate, and entrance is next
A to be opened in the cycle, converter is complete discontinuous current mode at this time.Traditional BOOST or BUCK controls are in Working mould of the same race
Formula can only realize energy one-way flow, therefore often can only operate under discontinuous current mode (DCM) under small load pattern, at this time
Discontinuous due to inductive current, current sample is be easy to cause inaccurate at this time, and then is unfavorable for the digitized sampling of system, so as to
Cause control loop bandwidth relatively low, be easy to cause the unstable reforming phenomena of system, reduce the reliability of system.
The content of the invention
The object of the present invention is to provide a kind of control methods of dcdc converter, are used to implement the conversion of direct current, and
Dcdc converter operating current is continuous.
In order to solve the above technical problems, the present invention provides a kind of control method of dcdc converter, the dcdc converter
Including 4 groups of bridge arms and 2 groups of connection units；Bridge arm described in every group includes first switch pipe, second switch pipe, first switch pipe and corresponds to
Capacitance, the corresponding capacitance of second switch pipe；The first end of first switch pipe capacitance corresponding with the first switch pipe
First end connect and be used as the first end of the bridge arm, the second end of the second switch pipe is corresponding with the second switch pipe
The second end of capacitance connect and be used as the second end of the bridge arm, second end, the first switch of the first switch pipe
Manage the first of the second end of corresponding capacitance, the first end of the corresponding capacitance of the second switch pipe and the second switch pipe
End connects and as the common port of the bridge arm；Connection unit described in every group include the first capacitance, the second capacitance, the 3rd capacitance,
First diode, the second diode；First end of the first end of first capacitance as the connection unit, second electricity
Second end of the second end of appearance as the connection unit, the second end of first capacitance, the first end of second capacitance,
The anode of first diode is connected with the cathode of second diode, the cathode of first diode and the described 3rd
The first end of capacitance connects and is used as the 3rd end of the connection unit, the anode of second diode and the 3rd capacitance
Second end connect and be used as the 4th end of the connection unit；The first end of first bridge arm and the first end of the first connection unit
Connection, for being connected with the anode of the first power supply, the second end of the second bridge arm is connected with the second end of first connection unit,
For being connected with the cathode of first power supply, the common port of first bridge arm and the 3rd end of first connection unit connect
It connects, the common port of second bridge arm is connected with the 4th end of first connection unit；The first end and second of 3rd bridge arm
The first end connection of connection unit, is connected, the second end of four bridge legs is connected with described second for the anode with second source
The second end connection of unit, for being connected with the cathode of the second source, the common port and described second of the 3rd bridge arm
The 3rd end connection of connection unit, the common port of the four bridge legs are connected with the 4th end of second connection unit；It is described
The second end of first bridge arm is connected with the first end of second bridge arm, and pass through inductance and the 3rd bridge arm second end and
The first end connection of the four bridge legs；
The control method, including：
Obtain the demand for control that the first power supply discharges to second source；
Sample the voltage of current first power supply and the voltage of second source；
When the first supply voltage is less than second source voltage；
Successively using dcdc converter described in T1, T2 timing control, in T2 timing control, inspection in a controlling cycle
Survey inductive current whether zero passage, if so, then further including T3, T4 sequential or T7, T8 sequential after T2；
When the first supply voltage is higher than second source voltage, T5, T6 sequential control are used successively in a switch periods
Make the dcdc converter, in T6 timing control, detection inductive current whether zero passage, if so, then further including T3, T4 after T6
Sequential or T7, T8 sequential or T3, T4 sequential；
T1 sequential：First bridge arm, four bridge legs are both turned on, and the second bridge arm, the 3rd bridge arm are turned off；
T2 sequential：Four bridge legs turn off, and the first bridge arm and the second bridge arm do not simultaneously turn on；
T3 sequential：3rd bridge arm turns on；Second bridge arm, four bridge legs are turned off；
T4 sequential：Second bridge arm, the 3rd bridge arm are turned off；
T5 sequential：First bridge arm turns on；Second bridge arm, four bridge legs are turned off；
T6 sequential：First bridge arm, four bridge legs are turned off；
T7 sequential：Second bridge arm, the 3rd bridge arm are both turned on, and the first bridge arm, four bridge legs are turned off；
T8 sequential：Second bridge arm is turned off, and the 3rd bridge arm and four bridge legs do not simultaneously turn on.
In terms of existing technologies, the control method of this dcdc converter can be according to the charging and discharging need of the first power supply
Carry out two-way changing is sought, and the electric current of overall process inductance is continuous, double conversion can be dropped by realizing that high-voltage bidirectional can rise, and be had following excellent
Point：
1. continuous current mode is conducive to the digitized sampling of electric current, it is easy to realize the line sampling of electric current wide scope,
So as to being conducive to the design of digital control system of system, the design bandwidth of loop is improved,
The loop response ability under load dynamic is improved, improves the reliability of system application；
2. loop of power circuit is inconsistent under inductive energy storage state and freewheeling state, is conducive to power tube and disperses to radiate, reduce
Cooling requirements improve the reliability of system application；
3. each state of a control, realizes energy in bidirectional flow, be conducive to system control and stablize；
The symmetrical control of driving, control program are simple.
Description of the drawings
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be done simply below
It introduces, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ordinary skill people
For member, without creative efforts, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is a kind of topological diagram of dcdc converter provided in an embodiment of the present invention；
Fig. 2 realizes that the first power supply puts second source when being less than second source voltage for the first supply voltage in the present invention
One sequence diagram of electricity；
Fig. 3 realizes that the first power supply puts second source when being less than second source voltage for the first supply voltage in the present invention
Another sequence diagram of electricity；
Fig. 4 realizes that the first power supply puts second source when being less than second source voltage for the first supply voltage in the present invention
The another sequence diagram of electricity；
Fig. 5 realizes that the first power supply puts second source when being higher than second source voltage for the first supply voltage in the present invention
One sequence diagram of electricity；
Fig. 6 realizes that the first power supply puts second source when being higher than second source voltage for the first supply voltage in the present invention
Another sequence diagram of electricity；
Fig. 7 is the current flow diagrams of T1 sequential in Fig. 3, Fig. 4 of the present invention；
Fig. 8 is a current flow diagrams of T2 sequential in Fig. 3, Fig. 4 of the present invention；The current flow diagrams of T5 sequential in Fig. 5, Fig. 6；
Fig. 9 is another current flow diagrams of T2 sequential in Fig. 3, Fig. 4 of the present invention；The current direction of T6 sequential in Fig. 5, Fig. 6
Figure；
Figure 10 is the current flow diagrams of T3 sequential in Fig. 3, Fig. 6 of the present invention；A current direction of T8 sequential in Fig. 4, Fig. 5
Figure；
Figure 11 is the current flow diagrams of T4 sequential in Fig. 3, Fig. 6 of the present invention；A current flow diagrams of T8 sequential in Fig. 4, Fig. 5
Figure 12 is the current flow diagrams of T7 sequential in Fig. 4, Fig. 5 of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment rather than whole embodiments of the present invention.Based on this
Embodiment in invention, without making creative work, what is obtained is every other by those of ordinary skill in the art
Embodiment belongs to the scope of the present invention.
The core of the present invention is to provide a kind of control method of dcdc converter, is used to implement the conversion of direct current, and
Mapping mode is various, while can realizing two-way changing so that continuous current mode, and suitable for high pressure occasion.
In order to which those skilled in the art is made to more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is a kind of topological diagram of dcdc converter provided in an embodiment of the present invention.As shown in Figure 1, including 4 groups of bridge arms
(being respectively the first bridge arm, the second bridge arm, the 3rd bridge arm and four bridge legs) and 2 groups of connection units (are respectively the first connection unit
With the second connection unit).
As shown in Figure 1, the first switch pipe and second switch pipe in the present invention illustrate by taking IGBT (N-channel) as an example.Certainly
In addition to IGBT, or metal-oxide-semiconductor.When first switch pipe and second switch pipe are IGBT, then the first of first switch pipe
It holds as collector, the second end of first switch pipe is emitter, and the first end of second switch pipe is collector, second switch pipe
Second end is emitter；If metal-oxide-semiconductor, then the first end of first switch pipe is drains, the second end of first switch pipe
For source electrode, the first end of second switch pipe is drain electrode, and the second end of second switch pipe is source electrode.
First bridge arm includes first switch pipe M1-Q1, second switch pipe M1-Q2, the corresponding electricity of first switch pipe M1-Q1
Hold M1-C1, the corresponding capacitance M1-C2 of second switch pipe；Second bridge arm includes first switch pipe M2-Q1, second switch pipe M2-
The corresponding capacitance M2-C1 of Q2, first switch pipe M2-Q1, the corresponding capacitance M2-C2 of second switch pipe；3rd bridge arm includes
One switching tube M3-Q1, second switch pipe M3-Q2, the corresponding capacitance M3-C1 of first switch pipe M3-Q1, second switch pipe are corresponding
Capacitance M3-C2；It is corresponding that four bridge legs include first switch pipe M4-Q1, second switch pipe M4-Q2, first switch pipe M4-Q1
The corresponding capacitance M4-C2 of capacitance M4-C1, second switch pipe.
First connection unit includes the first capacitance C1, the second capacitance C2, the 3rd capacitance C3, the first diode D1, the two or two
Pole pipe D2；Second connection unit includes the first capacitance C5, the second capacitance C6, the 3rd capacitance C4, the first diode D3, the two or two pole
Pipe D4.
Wherein, the first capacitance C1 in the first connection unit, the second capacitance C2 are bus capacitor, the first diode D1, the
The effect of two diode D2 is clamper, and the 3rd capacitance C3 is bridge joint capacitance or striding capacitance；The first electricity in second connection unit
It is bus capacitor to hold C5, the second capacitance C6, and the effect of the first diode D3, the second diode D4 are clampers, and the 3rd capacitance C4 is
Bridge capacitance or striding capacitance.
Specific connection relation is as follows：
1) connection relation of the first bridge arm is as follows：The collector and first switch of the first switch pipe M1-Q1 of first bridge arm
The first end of the corresponding capacitance M1-C1 of pipe M1-Q1 connects and is used as the first end of the first bridge arm, the hair of second switch pipe M1-Q2
The second end of emitter-base bandgap grading capacitance M1-C2 corresponding with second switch pipe M1-Q2 connects and is used as the second end of the first bridge arm, and first opens
Close the second end of the corresponding capacitance M1-C1 of emitter, first switch pipe M1-Q1 of pipe M1-Q1, second switch pipe M1-Q2 is corresponded to
The first end of capacitance M1-C2 and the collector of second switch pipe M1-Q2 connect and be used as the common port of the first bridge arm.It needs
Illustrate, the corresponding capacitance M1-C2 of first switch pipe M1-Q1 corresponding capacitance M1-C1 and second switch pipe M1-Q2 do not have pole
Property point.
2) connection relation of the second bridge arm is as follows：The collector and first switch of the first switch pipe M2-Q1 of second bridge arm
The first end of the corresponding capacitance M2-C1 of pipe M2-Q1 connects and is used as the first end of the second bridge arm, the hair of second switch pipe M2-Q2
The second end of emitter-base bandgap grading capacitance M2-C2 corresponding with second switch pipe M2-Q2 connects and is used as the second end of the second bridge arm, and first opens
Close the second end of the corresponding capacitance M2-C1 of emitter, first switch pipe M2-Q1 of pipe M2-Q1, second switch pipe M2-Q2 is corresponded to
The first end of capacitance M2-C2 and the collector of second switch pipe M2-Q2 connect and be used as the common port of the second bridge arm.It needs
Illustrate, the corresponding capacitance M2-C2 of first switch pipe M2-Q1 corresponding capacitance M2-C1 and second switch pipe M2-Q2 do not have pole
Property point.
3) connection relation of the 3rd bridge arm is as follows：The collector and first switch of the first switch pipe M3-Q1 of 3rd bridge arm
The first end of the corresponding capacitance M3-C1 of pipe M3-Q1 connects and is used as the first end of the 3rd bridge arm, the hair of second switch pipe M3-Q2
The second end of emitter-base bandgap grading capacitance M3-C2 corresponding with second switch pipe M3-Q2 connects and is used as the second end of the 3rd bridge arm, and first opens
Close the second end of the corresponding capacitance M3-C1 of emitter, first switch pipe M3-Q1 of pipe M3-Q1, second switch pipe M3-Q2 is corresponded to
The first end of capacitance M3-C2 and the collector of second switch pipe M3-Q2 connect and be used as the common port of the 3rd bridge arm.It needs
Illustrate, the corresponding capacitance M2-C2 of first switch pipe M3-Q1 corresponding capacitance M3-C1 and second switch pipe M3-Q2 do not have pole
Property point.
4) connection relation of four bridge legs is as follows：The collector and first switch of the first switch pipe M4-Q1 of four bridge legs
The first end of the corresponding capacitance M4-C1 of pipe M4-Q1 connects and is used as the first end of four bridge legs, the hair of second switch pipe M4-Q2
The second end of emitter-base bandgap grading capacitance M4-C2 corresponding with second switch pipe M4-Q2 connects and is used as the second end of four bridge legs, and first opens
Close the second end of the corresponding capacitance M4-C1 of emitter, first switch pipe M4-Q1 of pipe M4-Q1, second switch pipe M4-Q2 is corresponded to
The first end of capacitance M4-C2 and the collector of second switch pipe M4-Q2 connect and be used as the common port of four bridge legs.It needs
Illustrate, the corresponding capacitance M4-C2 of first switch pipe M4-Q1 corresponding capacitance M4-C1 and second switch pipe M4-Q2 do not have pole
Property point.
5) first end of the first end of the first capacitance C1 in the first connection unit as the first connection unit, the second capacitance
Second end of the second end of C2 as the first connection unit, the second end of the first capacitance C1, the first end of the second capacitance C2, first
The cathode of the anode of diode D1 and the second diode D2 connect, the cathode of the first diode D1 and the first end of the 3rd capacitance C3
It connects and is used as the 3rd end of the first connection unit, the anode of the second diode D2 is connected and makees with the second end of the 3rd capacitance C3
For the 4th end of the first connection unit.
6) first end of the first end of the first capacitance C5 in the second connection unit as the second connection unit, the second capacitance
Second end of the second end of C6 as the second connection unit, the second end of the first capacitance C5, the first end of the second capacitance C6, first
The cathode of the anode of diode D3 and the second diode D4 connect, the cathode of the first diode D3 and the first end of the 3rd capacitance C4
It connects and is used as the 3rd end of the second connection unit, the anode of the second diode D4 is connected and makees with the second end of the 3rd capacitance C4
For the 4th end of the second connection unit.
7) first end of the first bridge arm is connected with the first end of the first connection unit, for the first power supply (battery pack
Bat anode connection), the second end of the second bridge arm is connected with the second end of the first connection unit, for the first power supply (battery
Group Bat) cathode connection, the common port of the first bridge arm is connected with the 3rd end of the first connection unit, the common port of the second bridge arm
It is connected with the 4th end of the first connection unit.
8) first end of the 3rd bridge arm is connected with the first end of the second connection unit, for second source (photovoltaic system)
Anode connection, the second end of four bridge legs is connected with the second end of the second connection unit, for second source (photovoltaic system
System) cathode connection, the common port of the 3rd bridge arm is connected with the 3rd end of the second connection unit, the common port of four bridge legs and the
The 4th end connection of two connection units.
9) second end of the first bridge arm is connected with the first end of the second bridge arm, and passes through the second of inductance L1 and the 3rd bridge arm
End is connected with the first end of four bridge legs.
It should be noted that Fig. 1 is a kind of specific topological structure, the first power supply is battery pack in the topological structure
Bat, second source are photovoltaic system, but in specific implementation, the first power supply and second source can be chosen with concrete condition, and
Scene shown in FIG. 1 is not necessarily the only, for example, the first power supply can be photovoltaic system, second source is battery pack etc..
For topological structure shown in FIG. 1 by controlling the conducting and cut-off of different switching tubes, can possess two-way rise can
Buck functionality, from the angle of control switching tube, above-mentioned dcdc converter can realize that following four converts：
1st, electric discharge of first power supply to second source is realized when the first supply voltage is less than second source voltage；
2nd, electric discharge of first power supply to second source is realized when the first supply voltage is higher than second source voltage；
3rd, electric discharge of the second source to the first power supply is realized when the first supply voltage is less than second source voltage；
4th, electric discharge of the second source to the first power supply is realized when the first supply voltage is higher than second source voltage.
The invention discloses the control method of above four kinds conversion, in order to make those skilled in the art more clear of the invention
The control method of the dcdc converter provided below in conjunction with the control sequential and attached drawing of switching tube, is made control method into one
Walk explanation.
1st, the control of electric discharge of first power supply to second source is realized when the first supply voltage is less than second source voltage
Method is as follows：
When need control the first power supply discharge second source, and the first supply voltage be less than second source voltage
When, successively using dcdc converter described in T1, T2 timing control, in T2 timing control, detection electricity in a switch periods
Feel L1 electric current whether zero passage, if so, then further including T3, T4 sequential or T7, T8 sequential after T2.Wherein the sequential of T1~T2 is such as
It is specific as follows shown in Fig. 2：
T1 sequential：The first switch pipe M1-Q1 of first bridge arm, the second switch pipe M1-Q2 of the first bridge arm, four bridge legs
The second switch pipe M4-Q2 of first switch pipe M4-Q1 and four bridge legs is both turned on, the first switch pipe M2-Q1 of the second bridge arm,
Second switch pipe M2-Q2, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm of two bridge arms
It is turned off.As shown in fig. 7, at this point, current direction is, the first switch pipe that battery pack Bat+ (i.e. capacitance C1) passes through the first bridge arm
M1-Q1, the second switch pipe M1-Q2 of the first bridge arm, inductance L1, the first switch pipe M4-Q1 of four bridge legs, the of four bridge legs
Two switching tube M4-Q2 are back to battery pack BAT- (i.e. capacitance C2).The current direction for defining inductance L1 is from left to right electric current " just "
Flow direction, it is on the contrary then for it is " negative " flow to.Should during, capacitance C1, capacitance C2 discharge, and the electric current of inductance L1 is just and electric current
Gradually increase, inductance L1 energy storage, until T2 sequential.
T2 sequential：First switch pipe M4-Q1, the second switch pipe M4-Q2 of four bridge legs of four bridge legs are turned off, and the
One bridge arm and the second bridge arm do not simultaneously turn on.The process has the following two kinds current direction.
The first, when the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are both turned on
When, as shown in figure 8, at this point, current direction is, the body diode for the second switch pipe M3-Q2 that inductance L1 passes through the 3rd bridge arm,
The body diode of the first switch pipe M3-Q1 of three bridge arms, capacitance C5 (i.e. photovoltaic system anode), capacitance C6 (i.e. bear by photovoltaic system
Pole), capacitance C2 (i.e. battery pack Bat-), capacitance C1 (i.e. battery pack Bat+), the first switch pipe M1-Q1 of the first bridge arm, first
The second switch pipe M1-Q2 of bridge arm carries out releasing energy to inductance L1.
Second, when the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are turned off
When, as shown in figure 9, at this point, current direction is, the body diode for the second switch pipe M3-Q2 that inductance L1 passes through the 3rd bridge arm,
The body diode of the first switch pipe M3-Q1 of three bridge arms, capacitance C5 (i.e. photovoltaic system anode), capacitance C6 (i.e. bear by photovoltaic system
Pole), the body diode of the second switch pipe M2-Q2 of the second bridge arm, the second bridge arm first switch pipe M2-Q1 body diode extremely
Inductance L1 carries out releasing energy.
More than in 2 kinds of current directions, inductance L1 release can, current direction is just, and electric current is gradually reduced.Capacitance C5, electricity
Hold C6 bulk charges.
When the first switch pipe M1-Q1 and the second switch pipe M1-Q2 of the first bridge arm that in T2 sequential, control the first bridge arm are equal
Shut-off makes the body diode for the second switch pipe M2-Q2 that electric current passes through the second bridge arm, the first switch of the second bridge arm in the process
The body diode of pipe M2-Q1, and in T1 sequential, electric current by the first switch pipe M1-Q1 of the first bridge arm, the first bridge arm
Two switching tube M1-Q2.With reference to T1 sequential and T2 sequential, two work schedules are operated in respectively on the first bridge arm and the second bridge arm,
The working stress of switching tube is helped to disperse, and beneficial to heat dissipation.Therefore, above-mentioned second of electric current stream is preferably used in T2 sequential
To.
In T1, T2 sequential, it is equivalent to and realizes that the first power supply boosts to the BOOST of second source, the first of four bridge legs open
The second switch pipe M4-Q2 of pass pipe M4-Q1 and four bridge legs is equivalent to the high-frequency tube of BOOST circuits.When the first of four bridge legs
When the duty of the second switch pipe M4-Q2 of switching tube M4-Q1 and four bridge legs is bigger, i.e. T1 sequential service time is longer, T2
Sequential service time is shorter, at this point, the electric current of inductance L1 is continuous in T1 and T2 sequential, and is positive direction, such as Fig. 2 institutes
Show；When duty cycle is reduced to certain value, the electric current of inductance L1 at the end of switch periods to 0, open electric current by lucky next cycle
Begin, inductance L1 starts energy storage again, and inductive current increase is critical current pattern；When duty cycle further reduces, i.e., in T2
Inductive current gradually decreases to 0, but switch periods and does not terminate in sequential, for the situation, further includes following T3 and T4
Sequential or T7, T8 sequential.When further including T3, T4 sequential after T1, T2 sequential, as shown in Figure 3.
T3 sequential：The first switch pipe M3-Q1 of 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are both turned on, the
The first switch pipe M2-Q1 of two arms and the second switch pipe M2-Q2 of the second bridge arm are turned off.As shown in Figure 10, at this point, electric current stream
Xiang Wei, photovoltaic system anode (i.e. capacitance C5) pass through the first switch pipe M3-Q1 of the 3rd bridge arm, the second switch pipe of the 3rd bridge arm
M3-Q2, inductance L1, the body diode of second switch pipe M1-Q2 of the first bridge arm, the first switch pipe M1-Q1 of the first bridge arm
Body diode, capacitance C1 (i.e. battery pack Bat+), capacitance C2 (i.e. battery pack Bat-) are back to photovoltaic system cathode (i.e. capacitance C6).
In this process, capacitance C5, capacitance C6 discharge, capacitance C1, capacitance C2 bulk charges, inductance L1 energy storage, electric current increase, but electric current
Direction is negative.
T4 sequential：The first switch pipe M3-Q1 of 3rd bridge arm, the second switch pipe M3-Q2 of the 3rd bridge arm, the second bridge arm
The second switch pipe M2-Q2 of first switch pipe M2-Q1 and the second bridge arm is turned off.As shown in figure 11, at this point, inductance L1 passes through
Body diode, the capacitance C1 of the body diode of the second switch pipe M1-Q2 of one bridge arm, the first switch pipe M1-Q1 of the first bridge arm
(i.e. battery pack Bat+), capacitance C2 (i.e. battery pack Bat-), four bridge legs second switch pipe M4-Q2 body diode, the 4th
The body diode of the first switch pipe M4-Q1 of bridge arm is back to inductance L1.In this process, inductance L1 releases energy, and electric current is gradually reduced,
And current direction is negative.Capacitance C1, capacitance C2 bulk charges.
According to the electric current of above-mentioned T1~T4, in switch periods, the electric current of inductance L1 is continuous always.One switch week
It is interim, the first power supply (i.e. battery pack BAT) to be controlled to discharge second source (i.e. photovoltaic system), it only need to be by inductance L1's
The area that electric current positive direction is formed is more than the area that negative direction is formed, and the difference of the two area is the first power supply to second
The energy of corona discharge.
Further, when the first supply voltage is less than second source voltage, used before the current over-zero of inductance L1
Dcdc converter described in T3 timing control.Specifically, make first switch pipe M3-Q1, the 3rd bridge arm of the 3rd bridge arm in T2 sequential
Second switch pipe M3-Q2 be both turned on, the first switch pipe M2-Q1 of the second bridge arm, the second switch pipe M2-Q2 of the second bridge arm are equal
Shut-off.At this point, the electric current of inductance L1 be timing, electric current still through the second switch pipe M3-Q2 of the 3rd bridge arm body diode
It is formed into a loop with the body diode of the first switch pipe M3-Q1 of the 3rd bridge arm, current direction and the current direction phase of original T2 sequential
Together, as shown in Fig. 8 or Fig. 9；When the electric current of inductance L1 is reduced to 0, T3 timing control can be immediately begun to, thus can be avoided in T2
With the switching of T3 sequential T3 sequential is caused to fail to be controlled in time.
Further, T4 sequential further includes the first switch pipe M1-Q1 of the first bridge arm, the second switch pipe of the first bridge arm
The second switch pipe M4-Q2 of M1-Q2, the first switch pipe M4-Q1 of four bridge legs and four bridge legs are both turned on.At this point, work as inductance
When the electric current of L1 is bears, current direction is identical with the current direction of original T4 sequential, as shown in figure 11；When the electric current of inductance L1 reduces
During to 0, next switch periods T1 timing control can be immediately begun to, thus can be avoided in T4 and the switching of next switch periods T1 sequential
T1 sequential is caused to fail to be controlled in time.
Further, T2 and T3 sequential further includes the first switch pipe M1-Q1 shut-offs of the first bridge arm.During with reference to more than T1~T4
Sequence understands that the second switch pipe M1-Q2 of the first bridge arm and the first switch pipe M2-Q1 of the second bridge arm are equal in entire switch periods
It is held off, and the first drive signal of first switch pipe M1-Q1 of the first bridge arm and the first switch pipe M3-Q1 of the 3rd bridge arm
The second drive signal reverse phase, driving circuit can be simplified, at the same can reduce switching tube loss.
In another embodiment, T2 and T3 sequential further includes the first switch pipe M1-Q1 conductings of the first bridge arm.With reference to more than T1
~T4 sequential understands that the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are in entire switch week
Interim to be held on, the first switch pipe M2-Q1 of the second bridge arm and the second switch pipe M2-Q2 of the second bridge arm are in entire switch week
It is interim to be held off, driving circuit can be simplified, while switching tube loss can be reduced.
When further including T7, T8 sequential after T1, T2 sequential, as shown in Figure 4.
T7 sequential：The first switch pipe M3-Q1 of 3rd bridge arm, the second switch pipe M3-Q2 of the 3rd bridge arm, the second bridge arm
The second switch pipe M2-Q2 of first switch pipe M2-Q1 and the second bridge arm is both turned on, the first switch pipe M4-Q1 of four bridge legs,
The second switch pipe M1-Q2 of the second switch pipe M4-Q2 of four bridge legs, the first switch pipe M1-Q1 of the first bridge arm and the first bridge arm
It is turned off.As shown in figure 12, at this point, current direction is, photovoltaic system anode (i.e. capacitance C5) is opened by the first of the 3rd bridge arm
Close pipe M3-Q1, the second switch pipe M3-Q2 of the 3rd bridge arm, inductance L1, first switch pipe M2-Q1, the second bridge arm of the second bridge arm
Second switch pipe M2-Q2 be back to photovoltaic system cathode (i.e. capacitance C6).In this process, capacitance C5, capacitance C6 discharge, electricity
Feel L1 energy storage, electric current increase, but current direction is negative.
T8 sequential：The first switch pipe M2-Q1 of second bridge arm and the second switch pipe M2-Q2 of the second bridge arm are turned off, and
First bridge arm and the second bridge arm do not simultaneously turn on.The process has the following two kinds current direction.
The first, is when the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are both turned on,
When the second switch pipe M4-Q2 of four bridge legs and the first switch pipe M4-Q1 of four bridge legs are turned off, as shown in Figure 10, at this point,
Current direction is the body diode for the second switch pipe M1-Q2 that inductance L1 passes through the first bridge arm, the first switch pipe of the first bridge arm
The body diode capacitance C1 (i.e. battery pack BAT+) of M1-Q1, capacitance C2 (i.e. battery pack BAT-), capacitance C6 (i.e. bear by photovoltaic system
Pole), capacitance C5 (i.e. photovoltaic system anode), the first switch pipe M3-Q1 of the 3rd bridge arm, the second switch pipe M3- of the 3rd bridge arm
Q2 is back to inductance L1 and carries out releasing energy.
Second, when the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are turned off,
As shown in figure 11, at this point, current direction is, the body diode for the second switch pipe M1-Q2 that inductance L1 passes through the first bridge arm, first
The body diode capacitance C1 (i.e. battery pack BAT+) of the first switch pipe M1-Q1 of bridge arm, capacitance C2 (i.e. battery pack BAT-), the 4th
The body diode of the second switch pipe M4-Q2 of bridge arm, the body diode of the first switch pipe M4-Q1 of four bridge legs are back to inductance L1
It carries out releasing energy.
More than in 2 kinds of current flow diagrams, inductance L1 release can, current direction is negative, and electric current is gradually reduced.Capacitance C1,
Capacitance C2 bulk charges.
When in T8 sequential, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are turned off
When, the body diode for the second switch pipe M4-Q2 which passes through four bridge legs, the first switch pipe M4- of four bridge legs
The body diode of Q1, and in T7 sequential, first switch pipe M3-Q1, the second switch pipe of the 3rd bridge arm of the 3rd bridge arm of electric current
M3-Q2, with reference to T7 sequential and T8 sequential, two work schedules are operated in respectively on the switching tube of different bridge arms, are helped to disperse
The working stress of switching tube, and beneficial to heat dissipation.Therefore, preferably using above-mentioned second flow direction in T8 sequential.
According to the electric current of above-mentioned T1, T2, T7, T8, in switch periods, inductive current is continuous always.
Further, dcdc converter described in T7 timing control is used before the current over-zero of inductance L1.Specifically,
T2 sequential opens the first switch pipe M2-Q1 of the second bridge arm, the second switch pipe M2-Q2 of the second bridge arm, the first of the 3rd bridge arm
Close pipe M3-Q1, the second switch pipe M3-Q2 of the 3rd bridge arm is both turned on.At this point, the electric current of inductance L1 be timing, current direction with
The current direction of former T2 sequential is identical, as shown in Fig. 8 or Fig. 9；When the electric current of inductance L1 is reduced to 0, when can immediately begin to T7
Sequence controls, and thus can avoid in the switching of T2 and T7 sequential T7 sequential being caused to fail to be controlled in time.
Further, T8 sequential further includes the first switch pipe M1-Q1 of the first bridge arm, the second switch pipe of the first bridge arm
The second switch pipe M4-Q2 of M1-Q2, the first switch pipe M4-Q1 of four bridge legs and four bridge legs are both turned on, and the of the 3rd bridge arm
The second switch pipe M3-Q2 of one switching tube M3-Q1 and the 3rd bridge arm is turned off.At this point, when the electric current of inductance L1 is bears, electric current
Flow direction is identical with the current direction of original T8 sequential, as shown in Figure 10 or Figure 11；It, can be immediately when the electric current of inductance L1 is reduced to 0
Start next switch periods T1 timing control, thus can avoid causing T1 sequential not in T8 and the switching of next switch periods T1 sequential
It can be controlled in time.
Further, T8 sequential further includes the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe of the first bridge arm
M1-Q2 is turned off.According to more than T1, T2, T7, T8 sequential, the first switch pipe M1-Q1 of the first bridge arm, the first bridge arm
Second switch pipe M1-Q2, the first switch pipe M4-Q1 of four bridge legs, the second switch pipe M4-Q2 of four bridge legs use first
Drive signal, the first switch pipe M2-Q1 of the second bridge arm, the second switch pipe M2-Q2 of the second bridge arm, the first of the 3rd bridge arm open
The second switch pipe M3-Q2 of pipe M3-Q1, the 3rd bridge arm is closed using the second drive signal, and the first drive signal and second drives
Dynamic signal inversion, can simplify driving circuit.
2nd, the control of electric discharge of first power supply to second source is realized when the first supply voltage is higher than second source voltage
Method is as follows：
When need control the first power supply discharge second source, and the first supply voltage be higher than second source voltage
When, successively using dcdc converter described in T5, T6 timing control, in T6 timing control, detection electricity in a switch periods
Feel L1 electric current whether zero passage, if so, then further including T7, T8 sequential or T3, T4 sequential after T6.After T5, T6 sequential also
During including T7, T8 sequential, as shown in figure 5, specific as follows：
T5 sequential：The first switch pipe M1-Q1 of first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are both turned on, the
The first switch pipe M4-Q1 of four bridge legs and the second switch pipe M4-Q2 of four bridge legs are turned off.As shown in figure 8, at this point, electric current
It flows to and is, battery pack Bat+ (i.e. capacitance C1) passes through the first switch pipe M1-Q1 of the first bridge arm, the second switch pipe of the first bridge arm
M1-Q2, inductance L1, the body diode of second switch pipe M3-Q2 of the 3rd bridge arm, the first switch pipe M3-Q1 of the 3rd bridge arm
Body diode, capacitance C5 (i.e. photovoltaic system anode), capacitance C6 (i.e. photovoltaic system cathode) are back to battery pack BAT- (i.e. capacitances
C2).Similarly, on the contrary the current direction for defining inductance L1 from left to right flows to for electric current " just ", then flowed to for electric current is " negative ".It should
In the process, inductance L1 electric currents are that just, and electric current gradually increases, inductance L1 energy storage, until T6 sequential.In this process, capacitance
C1, capacitance C2 discharge, capacitance C5, capacitance C6 bulk charges.
T6 sequential：The first switch pipe M1-Q1 of first bridge arm, the second switch pipe M1-Q2 of the first bridge arm, four bridge legs
The second switch pipe M4-Q2 of first switch pipe M4-Q1 and four bridge legs is turned off.As shown in figure 9, at this point, current direction is, electricity
Two pole of body of the body diode for the second switch pipe M3-Q2 that sense L1 passes through the 3rd bridge arm, the first switch pipe M3-Q1 of the 3rd bridge arm
The second switch pipe M2-Q2 of pipe, capacitance C5 (i.e. photovoltaic system anode), capacitance C6 (i.e. photovoltaic system cathode), the second bridge arm
Body diode, the body diode of first switch pipe M2-Q1 of the second bridge arm are back to inductance L1 and carry out releasing energy.In this process, it is electric
Sense L1 release can, current direction is just, and electric current is gradually reduced.Capacitance C5, capacitance C6 bulk charges.
In T5, T6 sequential, it is equivalent to and realizes that the first power supply is depressured the BUCK of second source, the first switch of the first bridge arm
The second switch pipe M2-Q2 of pipe M1-Q1 and the second bridge arm is equivalent to the high-frequency tube of BUCK circuits.When the first switch of the first bridge arm
When the duty of the second switch pipe M2-Q2 of pipe M1-Q1 and the second bridge arm is bigger, i.e. T5 sequential service time is longer, T6 sequential
Service time is shorter, at this point, the electric current of inductance L1 is continuous in T5 and T6 sequential, and is positive direction；When duty cycle subtracts
It is small to certain value when, for electric current to 0, lucky next cycle, inductance starts energy storage to inductive current again at the end of switch periods,
Inductive current increases, and is critical current pattern；When duty cycle further reduces, i.e., inductive current gradually subtracts in T6 sequential
Small to 0, but one switch periods do not terminate, and for the situation, further include following T7 and T8 sequential, as shown in Figure 5.
T7, T8 sequential are as described above, details are not described herein.
According to the electric current of above-mentioned T5~T8, in switch periods, inductive current is continuous always.
Further, when the first supply voltage is higher than second source voltage, used before the current over-zero of inductance L1
Dcdc converter described in T7 timing control.Specifically, make first switch pipe M2-Q1, the second bridge of the second bridge arm in T6 sequential
Second switch pipe M2-Q2, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm of arm are led
It is logical.At this point, the electric current of inductance L1 is timing, current direction is identical with the current direction of original T6 sequential, as shown in Figure 9；Work as inductance
When the electric current of L1 is reduced to 0, T7 timing control can be immediately begun to, thus can avoid causing T7 sequential not in the switching of T6 and T7 sequential
It can be controlled in time.
Further, T8 sequential further includes the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe of the first bridge arm
M1-Q2 is both turned on, and the first switch pipe M4-Q1 of four bridge legs and the second switch pipe M4-Q2 of four bridge legs are turned off.At this point,
When the electric current of inductance L1 is bears, current direction is identical with the current direction of original T8 sequential, as shown in Figure 10 or Figure 11；Work as inductance
When the electric current of L1 is reduced to 0, next switch periods T5 timing control can be immediately begun to, thus can be avoided in T8 and next switch week
The switching of phase T5 sequential causes T5 sequential to fail to be controlled in time.
Further, T5 sequential and T8 sequential further include the 3rd bridge arm first switch pipe M3-Q1 and the 3rd bridge arm
Two switching tube M3-Q2 are turned off.According to more than T5~T8 sequential, the first switch pipe M4-Q1 and the 4th bridge of four bridge legs
The second switch pipe M4-Q2 of arm is held off in entire switch periods, and the first switch pipe M1-Q1 and first of the first bridge arm
The second switch pipe M1-Q2 of bridge arm is using the first drive signal, the first switch pipe M2-Q1 of the second bridge arm, the second bridge arm
The second switch pipe M3-Q2 of second switch pipe M2-Q2, the first switch pipe M3-Q1 of the 3rd bridge arm and the 3rd bridge arm are using the
Two driving signal, and the first drive signal and the second drive signal reverse phase, can simplify driving circuit, while can reduce switching tube damage
Consumption.
In another embodiment, T5 sequential and T8 sequential further include the first switch pipe M3-Q1 and the 3rd bridge of the 3rd bridge arm
The second switch pipe M3-Q2 of arm is both turned on.According to more than T5~T8 sequential, the first switch pipe M4-Q1 of four bridge legs and
The second switch pipe M4-Q2 of four bridge legs is held off in entire switch periods, the first switch pipe M3-Q1 of the 3rd bridge arm and
The second switch pipe M3-Q2 of 3rd bridge arm is held in entire switch periods；And first bridge arm first switch pipe M1-Q1
Second switch pipe M1-Q2 with the first bridge arm is using the first drive signal, the first switch pipe M2-Q1 of the second bridge arm and second
The second switch pipe M2-Q2 of bridge arm uses the second drive signal, and the first drive signal and the second drive signal reverse phase, can letter
Change driving circuit, while switching tube loss can be reduced.
When further including T3, T4 sequential after T5, T6 sequential, as shown in fig. 6, T5, T6, T3, T4 sequential, that is, current direction
As described above, details are not described herein.
Further, when the first supply voltage is higher than second source voltage, used before the current over-zero of inductance L1
Dcdc converter described in T3 timing control.Specifically, make the first switch pipe M3-Q1 and the 3rd bridge arm of the 3rd bridge arm in T6 sequential
Second switch pipe M3-Q2 be both turned on, the first switch pipe M2-Q1 of the second bridge arm and the second switch pipe M2-Q2 of the second bridge arm
It is turned off.At this point, the electric current of inductance L1 be timing, electric current still through the second switch pipe M3-Q2 of the 3rd bridge arm two pole of body
It manages, the body diode of the first switch pipe M3-Q1 of the 3rd bridge arm carries out releasing energy, current direction and the current direction phase of original T6 sequential
Together, as shown in Figure 9；When the electric current of inductance L1 is reduced to 0, T3 timing control can be immediately begun to, thus can be avoided in T6 and T3
Sequential switching causes T3 sequential to fail to be controlled in time.
Further, T4 sequential further includes the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe of the first bridge arm
M1-Q2 is both turned on, and the first switch pipe M4-Q1 of four bridge legs and the second switch pipe M4-Q2 of four bridge legs are turned off.At this point,
When the electric current of inductance L1 is bears, current direction is identical with the current direction of original T4 sequential, as shown in figure 11；When the electricity of inductance L1
When stream is reduced to 0, next switch periods T5 timing control can be immediately begun to, thus can be avoided in T4 and next switch periods T5
Sequence switching causes T5 sequential to fail to be controlled in time.
Further, T5 sequential further includes the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe of the 3rd bridge arm
M3-Q2 is turned off, and T3 sequential further includes the first switch pipe M1-Q1 of the first bridge arm and the second switch pipe M1-Q2 of the first bridge arm
It is turned off.According to more than T5, T6, T3, T4 sequential, the first switch pipe M2-Q1 of the second bridge arm, the second of the second bridge arm open
The second switch pipe M4-Q2 of pipe M2-Q2, the first switch pipe M4-Q1 of four bridge legs and four bridge legs are closed in entire switch periods
In be held off, and the second switch pipe M1-Q2 of the first switch pipe M1-Q1 of the first bridge arm and the first bridge arm using first drive
Dynamic signal, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are believed using the second driving
Number, and the first drive signal and the second drive signal reverse phase, driving circuit can be simplified, while switching tube loss can be reduced.
In above-mentioned control method, the first switch pipe and second switch Guan Jun of each bridge arm are simultaneously turned on and turned off, in reality
In the application of border, there is a timing when can control the first switch pipe of same bridge arm and second switch pipe on or off as needed
Long lag or lead.Especially when turning off the first switch pipe and second switch pipe of same bridge arm, same bridge arm is controlled
Outer tube (i.e. the first switch pipe M1-Q1 of the first bridge arm, the second switch pipe M2-Q2 of the second bridge arm, the first switch of the 3rd bridge arm
The second switch pipe M4-Q2 of pipe M3-Q1, four bridge legs) it is first turned off, battery voltage or photovoltaic system voltage is avoided to be added in outer tube
On cause to damage.
No matter the first supply voltage of control method of above-mentioned offer is higher or lower than second source voltage, first can be realized
Power supply discharges to second source, that is, realizes that second source charges, should during, can will be in above-mentioned dcdc converter
The first power supply regard the power supply for being to provide electric power as, and as second source is regarded to the load of consumption electric power.It likewise, can be real
Existing second source discharges to the first power supply.The control method that second source discharges to the first power supply is same as described above,
The driving of corresponding switching tube two-by-two need to only be exchanged.It is specific as follows：The first switch pipe M1-Q1 of first bridge arm is corresponded to
The first switch pipe M3-Q1 of 3rd bridge arm；The second switch pipe M1-Q2 of first bridge arm corresponds to the second switch pipe of the 3rd bridge arm
M3-Q2；The first switch pipe M2-Q1 of second bridge arm corresponds to the first switch pipe M4-Q1 of four bridge legs；The second of second bridge arm opens
Close the second switch pipe M4-Q2 that pipe M2-Q2 corresponds to four bridge legs.Specific control method is as follows.
3rd, electric discharge of the second source to the first power supply is realized when the first supply voltage is less than second source voltage.
When need control second source discharge the first power supply, and second source voltage be less than the first supply voltage
When, successively using dcdc converter described in T1', T2' timing control, in T2' timing control, detection in a switch periods
Inductance L1 electric currents whether zero passage, if so, then further including T3', T4' sequential or T7', T8' sequential after T2'.Wherein T1 '~T4 ',
T7', T8' sequential, it is specific as follows：
T1' sequential：First switch pipe M3-Q1, second switch pipe M3-Q2, the second bridge arm of the 3rd bridge arm of 3rd bridge arm
First switch pipe M2-Q1 and the second switch pipe M2-Q2 of the second bridge arm be both turned on, the first switch pipe M4-Q1 of four bridge legs,
The second switch pipe M1- of the second switch pipe M4-Q2 of four bridge legs, the first switch pipe M1-Q1 of the first bridge arm and the first bridge arm
Q2 is turned off；
T2' sequential：The first switch pipe M2-Q1 of second bridge arm, the second switch pipe M2-Q2 of the second bridge arm are turned off, and
3rd bridge arm and four bridge legs do not simultaneously turn on；
T3' sequential：The first switch pipe M1-Q1 of first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are both turned on, the
The first switch pipe M4-Q1 of four arms and the second switch pipe M4-Q2 of four bridge legs are turned off；
T4' sequential：The first switch pipe M1-Q1 of first bridge arm, second switch pipe M1-Q2, the four bridge legs of the first bridge arm
First switch pipe M4-Q1 and the second switch pipe M4-Q2 of four bridge legs be turned off；
T7 ' sequential：The first switch pipe M1-Q1 of first bridge arm, second switch pipe M1-Q2, the four bridge legs of the first bridge arm
First switch pipe M4-Q1 and the second switch pipe M4-Q2 of four bridge legs be both turned on, the first switch pipe M2-Q1 of the second bridge arm,
Second switch pipe M2-Q2, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3- of the 3rd bridge arm of second bridge arm
Q2 is turned off；
T8 ' sequential：The first switch pipe M4-Q1 of four bridge legs and the second switch pipe M4-Q2 of four bridge legs are turned off, and
3rd bridge arm and four bridge legs do not simultaneously turn on；
4th, electric discharge of the second source to the first power supply is realized when the first supply voltage is higher than second source voltage
When need control second source discharge the first power supply, and second source voltage be higher than the first supply voltage
When, successively using dcdc converter described in T5 ', T6 ' timing control, in T6 ' timing control, detection in a switch periods
The electric current of inductance L1 whether zero passage, if so, then further including T7 ', T8 ' sequential or T3 ', T4 ' sequential after T6 '；Wherein T5 '~
T8 ', T3 ', T4 ' sequential, it is specific as follows：
T5 ' sequential：The first switch pipe M3-Q1 of 3rd bridge arm and the second switch pipe M3-Q2 of the 3rd bridge arm are both turned on, the
The first switch pipe M2-Q1 of two bridge arms and the second switch pipe M2-Q2 of the second bridge arm are turned off；
T6 ' sequential：First switch pipe M3-Q1, second switch pipe M3-Q2, the second bridge arm of the 3rd bridge arm of 3rd bridge arm
First switch pipe M2-Q1 and the second switch pipe M2-Q2 of the second bridge arm be turned off；
T7 ' sequential：The first switch pipe M1-Q1 of first bridge arm, second switch pipe M1-Q2, the four bridge legs of the first bridge arm
First switch pipe M4-Q1 and the second switch pipe M4-Q2 of four bridge legs be both turned on, the first switch pipe M2-Q1 of the second bridge arm,
Second switch pipe M2-Q2, the first switch pipe M3-Q1 of the 3rd bridge arm and the second switch pipe M3- of the 3rd bridge arm of second bridge arm
Q2 is turned off；
T8 ' sequential：The first switch pipe M4-Q1 of four bridge legs and the second switch pipe M4-Q2 of four bridge legs are turned off, and
3rd bridge arm and four bridge legs do not simultaneously turn on；
T3' sequential：The first switch pipe M1-Q1 of first bridge arm and the second switch pipe M1-Q2 of the first bridge arm are both turned on, the
The first switch pipe M4-Q1 of four arms and the second switch pipe M4-Q2 of four bridge legs are turned off；
T4' sequential：The first switch pipe M1-Q1 of first bridge arm, second switch pipe M1-Q2, the four bridge legs of the first bridge arm
First switch pipe M4-Q1 and the second switch pipe M4-Q2 of four bridge legs be turned off；
Likewise, second source ought be controlled to discharge the first power supply, that is, the first power supply is controlled to charge, can incited somebody to action
Second source in above-mentioned dcdc converter regards the power supply for being to provide electric power as, and regards the first power supply as consumption electric power negative
It carries.
Dcdc converter provided by the present invention is described in detail above.Each embodiment is used and passed in specification
Into mode describe, the highlights of each of the examples are difference from other examples, phase between each embodiment
With similar portion, just to refer each other.For device disclosed in embodiment, due to its with embodiment disclosed in method it is opposite
Should, so description is fairly simple, reference may be made to the description of the method.It should be pointed out that for the art
For those of ordinary skill, without departing from the principle of the present invention, can also to the present invention some improvement and modification can also be carried out,
These improvement and modification are also fallen into the protection domain of the claims in the present invention.
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, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include 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 also there are other identical elements in the process, method, article or apparatus that includes the element.
Claims (10)
1. a kind of control method of dcdc converter, the dcdc converter includes 4 groups of bridge arms and 2 groups of connection units；
Bridge arm described in every group includes first switch pipe, second switch pipe, the corresponding capacitance of first switch pipe, second switch pipe and corresponds to
Capacitance；The first end of the first end of first switch pipe capacitance corresponding with the first switch pipe connects and described in being used as
The first end of bridge arm, the second end of the second end of second switch pipe capacitance corresponding with the second switch pipe are connected and made
For the second end of the bridge arm, the second end of the first switch pipe, the second end of the corresponding capacitance of the first switch pipe, institute
It states the first end of the corresponding capacitance of second switch pipe and the first end of the second switch pipe connects and is used as the bridge arm
Common port；
Connection unit described in every group includes the first capacitance, the second capacitance, the 3rd capacitance, the first diode, the second diode；It is described
First end of the first end of first capacitance as the connection unit, the second end of second capacitance is as the connection unit
Second end, the second end of first capacitance, the first end of second capacitance, the anode of first diode and described
The cathode connection of second diode, the cathode of first diode are connected with the first end of the 3rd capacitance and described in being used as
3rd end of connection unit, the anode of second diode are connected with the second end of the 3rd capacitance and are used as the connection
4th end of unit；
The first end of first bridge arm is connected with the first end of the first connection unit, for being connected with the anode of the first power supply, second
The second end of bridge arm is connected with the second end of first connection unit, described for being connected with the cathode of first power supply
The common port of first bridge arm is connected with the 3rd end of first connection unit, the common port of second bridge arm and described first
The 4th end connection of connection unit；
The first end of 3rd bridge arm is connected with the first end of the second connection unit, is connected for the anode with second source, the 4th
The second end of bridge arm is connected with the second end of second connection unit, described for being connected with the cathode of the second source
The common port of 3rd bridge arm is connected with the 3rd end of second connection unit, the common port of the four bridge legs and described second
The 4th end connection of connection unit；
The second end of first bridge arm is connected with the first end of second bridge arm, and passes through inductance and the 3rd bridge arm
Second end is connected with the first end of the four bridge legs；
The control method, it is characterised in that：
Obtain the demand for control that the first power supply discharges to second source；
Sample the voltage of current first power supply and the voltage of second source；
When the first supply voltage is less than second source voltage；
Successively using dcdc converter described in T1, T2 timing control, in T2 timing control, detection electricity in a controlling cycle
Inducing current whether zero passage, if so, then further including T3, T4 sequential or T7, T8 sequential after T2；
When the first supply voltage is higher than second source voltage, T5, T6 timing control institute are used successively in a switch periods
State dcdc converter, in T6 timing control, detection inductive current whether zero passage, if so, then further including T3, T4 sequential after T6
Or T7, T8 sequential or T3, T4 sequential；
T1 sequential：First bridge arm, four bridge legs are both turned on, and the second bridge arm, the 3rd bridge arm are turned off；
T2 sequential：Four bridge legs turn off, and the first bridge arm and the second bridge arm do not simultaneously turn on；
T3 sequential：3rd bridge arm turns on；Second bridge arm, four bridge legs are turned off；
T4 sequential：Second bridge arm, the 3rd bridge arm are turned off；
T5 sequential：First bridge arm turns on；Second bridge arm, four bridge legs are turned off；
T6 sequential：First bridge arm, four bridge legs are turned off；
T7 sequential：Second bridge arm, the 3rd bridge arm are both turned on, and the first bridge arm, four bridge legs are turned off；
T8 sequential：Second bridge arm is turned off, and the 3rd bridge arm and four bridge legs do not simultaneously turn on.
2. control method according to claim 1, it is characterised in that：When switch periods are T1, T2, T3, T4 sequential successively,
Dcdc converter described in T3 timing control is used before inductive current zero passage；When switch periods are successively T1, T2, T7, T8
During sequence, dcdc converter described in T7 timing control is used before inductive current zero passage；When switch periods be successively T5, T6, T7,
During T8 sequential, dcdc converter described in T7 timing control is used before inductive current zero passage；When switch periods be successively T5,
When T6, T3, T4 sequential, dcdc converter described in T3 timing control is used before inductive current zero passage.
3. control method according to claim 1, it is characterised in that：When switch periods are T1, T2, T3, T4 sequential successively,
T2 sequential further includes the conducting of the 3rd bridge arm, the shut-off of the second bridge arm；When switch periods are T1, T2, T7, T8 sequential successively, during T2
Sequence further includes the second bridge arm, the 3rd bridge arm is both turned on；When switch periods are T5, T6, T7, T8 sequential successively, T6 sequential is also wrapped
Include the second bridge arm, the 3rd bridge arm is both turned on；When switch periods are T5, T6, T3, T4 sequential successively, T6 sequential further includes the 3rd
Bridge arm turns on, the shut-off of the second bridge arm.
4. control method according to claim 3, it is characterised in that：When switch periods are T1, T2, T3, T4 sequential successively,
T4 sequential further includes the first bridge arm, four bridge legs are both turned on；When switch periods are T1, T2, T7, T8 sequential successively, T8 sequential
Further include the first bridge arm, four bridge legs are both turned on, the shut-off of the 3rd bridge arm；When switch periods are T5, T6, T7, T8 sequential successively,
T8 sequential further includes the conducting of the first bridge arm, four bridge legs shut-off；When switch periods are T5, T6, T3, T4 sequential successively, during T4
Sequence further includes the conducting of the first bridge arm, four bridge legs shut-off.
5. control method according to claim 4, it is characterised in that：T2 sequential further includes the shut-off of the first bridge arm, and T8 sequential is also
It is turned off including the 3rd bridge arm.
6. control method according to claim 5, it is characterised in that：T3 sequential further includes the conducting of the first bridge arm；T5 sequential is also
It is turned on including the 3rd bridge arm.
7. according to any one of the claim 1-5 control methods, it is characterised in that：First drive signal of the first bridge arm and
Second drive signal reverse phase of three bridge arms.
8. control method according to claim 7, it is characterised in that：When switch periods are T1, T2, T7, T8 sequential successively,
First bridge arm and four bridge legs use the second drive signal using the first drive signal, the second bridge arm and the 3rd bridge arm；When
When switch periods are T1~T4 sequential successively, the second bridge arm is held off in a switch periods；When switch periods are successively
During T5~T8 sequential, four bridge legs are held off in a switch periods；When switch periods are T5, T6, T3, T4 sequential successively
When, the second bridge arm and four bridge legs are held off in a switch periods.
9. control method according to claim 1, it is characterised in that：The first switch pipe and the second switch pipe are
IGBT or metal-oxide-semiconductor.
10. control method according to claim 1, it is characterised in that：The corresponding capacitance of the first switch pipe and described
The parameter all same of the corresponding capacitance of two switching tubes.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406133.9A CN108054919B (en) | 2017-12-22 | 2017-12-22 | A kind of control method of dcdc converter |
| PCT/CN2018/122900 WO2019120302A1 (en) | 2017-12-22 | 2018-12-21 | Voltage converting device and method of controlling voltage converting device |
| US16/229,922 US20190199226A1 (en) | 2017-12-22 | 2018-12-21 | Voltage converting device and method of controlling the voltage converting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711406133.9A CN108054919B (en) | 2017-12-22 | 2017-12-22 | A kind of control method of dcdc converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108054919A true CN108054919A (en) | 2018-05-18 |
| CN108054919B CN108054919B (en) | 2019-06-14 |
Family
ID=62131596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711406133.9A Active CN108054919B (en) | 2017-12-22 | 2017-12-22 | A kind of control method of dcdc converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108054919B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768706A (en) * | 2019-02-14 | 2019-05-17 | 西安特锐德智能充电科技有限公司 | Three-level DC-DC converter and circuit control method |
| WO2019120302A1 (en) * | 2017-12-22 | 2019-06-27 | Kehua Hengsheng Co., Ltd. | Voltage converting device and method of controlling voltage converting device |
| CN113285596A (en) * | 2021-04-20 | 2021-08-20 | 广州金升阳科技有限公司 | Buck-boost converter and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860206A (en) * | 2010-05-12 | 2010-10-13 | 杭州矽力杰半导体技术有限公司 | Three-level buck convertor |
| CN103746557A (en) * | 2013-12-17 | 2014-04-23 | 中国船舶重工集团公司第七一九研究所 | Bidirectional multi-level buck-boost converter and control method thereof |
| CN104124866A (en) * | 2013-04-26 | 2014-10-29 | 丰郅(上海)新能源科技有限公司 | Step-on and step-down two-way direct-current converter topology |
| CN105075090A (en) * | 2013-02-14 | 2015-11-18 | 德克萨斯仪器股份有限公司 | Buck-boost converter with buck-boost transition switching control |
| CN106130343A (en) * | 2016-08-31 | 2016-11-16 | 长沙广义变流技术有限公司 | A kind of step-up/step-down circuit |
| CN107231089A (en) * | 2017-05-23 | 2017-10-03 | 中国农业大学 | A kind of bidirectional three-level H bridges non-isolated dcdc converter |
-
2017
- 2017-12-22 CN CN201711406133.9A patent/CN108054919B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860206A (en) * | 2010-05-12 | 2010-10-13 | 杭州矽力杰半导体技术有限公司 | Three-level buck convertor |
| CN105075090A (en) * | 2013-02-14 | 2015-11-18 | 德克萨斯仪器股份有限公司 | Buck-boost converter with buck-boost transition switching control |
| CN104124866A (en) * | 2013-04-26 | 2014-10-29 | 丰郅(上海)新能源科技有限公司 | Step-on and step-down two-way direct-current converter topology |
| CN103746557A (en) * | 2013-12-17 | 2014-04-23 | 中国船舶重工集团公司第七一九研究所 | Bidirectional multi-level buck-boost converter and control method thereof |
| CN106130343A (en) * | 2016-08-31 | 2016-11-16 | 长沙广义变流技术有限公司 | A kind of step-up/step-down circuit |
| CN107231089A (en) * | 2017-05-23 | 2017-10-03 | 中国农业大学 | A kind of bidirectional three-level H bridges non-isolated dcdc converter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019120302A1 (en) * | 2017-12-22 | 2019-06-27 | Kehua Hengsheng Co., Ltd. | Voltage converting device and method of controlling voltage converting device |
| CN109768706A (en) * | 2019-02-14 | 2019-05-17 | 西安特锐德智能充电科技有限公司 | Three-level DC-DC converter and circuit control method |
| CN113285596A (en) * | 2021-04-20 | 2021-08-20 | 广州金升阳科技有限公司 | Buck-boost converter and control method thereof |
| CN113285596B (en) * | 2021-04-20 | 2023-02-14 | 广州金升阳科技有限公司 | Buck-boost direct current converter and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108054919B (en) | 2019-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107959417B (en) | A kind of control method of DCDC reversible transducer | |
| CN203942447U (en) | A kind of ZVT crisscross parallel high-gain formula DC/DC converter | |
| CN105515377B (en) | A kind of soft-switching and high-gain DC converter based on coupling inductance and times voltage capacitance | |
| CN101707441A (en) | Totem-pole bridgeless circuit system and current sampling device | |
| CN207691703U (en) | A kind of DC/AC modules of photovoltaic generating system | |
| CN110224601A (en) | A kind of high-gain Boost and its working method based on three winding coupling inductance | |
| CN209120060U (en) | High-gain DC/DC converter and power-supply system based on coupling inductance | |
| CN108054919B (en) | A kind of control method of dcdc converter | |
| CN104009645B (en) | A kind of series and parallel combined dual output LLC resonant converter | |
| CN105281361B (en) | A kind of five-level double step-down combining inverter | |
| CN109951081A (en) | A kind of end Buck coupling inductance formula buck translation circuit and control method | |
| CN108988634A (en) | A kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its control method | |
| CN109713901A (en) | A kind of end Boost coupling inductance formula buck translation circuit and control method | |
| CN103647448B (en) | Integrated step-down-flyback type high power factor constant current circuit and device | |
| CN110350786A (en) | A kind of multiphase is from flowing high-gain DC converter and its control strategy | |
| CN106655775A (en) | Two-port input ZVT high-gain Boost converter containing soft switching | |
| CN107565814A (en) | A kind of quasi- Z source switch boosting inverters of high-gain suitable for fuel cell power generation | |
| CN106026728A (en) | Photovoltaic micro inverter | |
| CN206294079U (en) | A kind of two-port input ZVT high-gain Boosts containing Sofe Switch | |
| CN105827109B (en) | A kind of redundant direct current translation circuit and its control method | |
| CN108054920A (en) | A kind of dcdc converter | |
| CN107994774B (en) | A kind of control method of DCDC reversible transducer | |
| CN107911024B (en) | A kind of high efficiency series hybrid multiport DC/DC converter | |
| CN108111015A (en) | A kind of DCDC reversible transducers | |
| CN109327139A (en) | A kind of step-up/step-down circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Applicant after: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd. Applicant after: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd. Address before: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Applicant before: XIAMEN KEHUA HENGSHENG Co.,Ltd. Applicant before: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Patentee after: Kehua Data Co.,Ltd. Patentee after: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd. Address before: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Patentee before: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd. Patentee before: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231206 Address after: Room 208-38, Hengye Building, No. 100 Xiangxing Road, Xiang'an Industrial Zone, Xiamen Torch High tech Zone, Xiamen, Fujian Province, 361000 Patentee after: Xiamen Kehua shuneng Technology Co.,Ltd. Address before: 361000 torch garden, torch high tech Zone, Xiamen, Fujian 457 Patentee before: Kehua Data Co.,Ltd. Patentee before: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd. |