CN108054919B - A kind of control method of dcdc converter - Google Patents
A kind of control method of dcdc converter Download PDFInfo
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- CN108054919B CN108054919B CN201711406133.9A CN201711406133A CN108054919B CN 108054919 B CN108054919 B CN 108054919B CN 201711406133 A CN201711406133 A CN 201711406133A CN 108054919 B CN108054919 B CN 108054919B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000003990 capacitor Substances 0.000 claims description 136
- 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 13
- 230000002457 bidirectional effect Effects 0.000 abstract description 4
- 230000009466 transformation 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
- 230000007423 decrease Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 239000006185 dispersion Substances 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
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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
- H02M3/10—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
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- 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 relationship, the control of different timing is carried out to dcdc converter, realize two-way changing, and the electric current of overall process inductance is continuous, double transformation can be dropped by realizing that high-voltage bidirectional can rise.
Description
Technical field
The present invention relates to electronic technology fields, more particularly to a kind of control method of dcdc converter.
Background technique
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 types, it is widely used in the fields such as solar power generation, uninterruptible power supply.Its working principle
It is by DC power conversion at another DC voltage (boost or depressurization).
Currently, dcdc converter using 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 converter.By taking voltage-dropping type Buck converter as an example, usually in full output
When 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 be will also decrease；The certain value when load current reduces, converter enter critical electricity
Stream mode.At this point, after the electric current of inductance returns to 0, switch periods are not over if load current further reduces, due to
The reverse blocking of diode acts on, and the electric current of inductance keeps a period of time at 0 value, and then switch periods terminate, and entrance is next
A to be opened in the period, converter is complete discontinuous current mode at this time.Traditional BOOST or BUCK control is 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 mode, 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, thus
Cause control loop bandwidth lower, be easy to cause the unstable reforming phenomena of system, reduce the reliability of system.
Summary of the invention
The object of the present invention is to provide a kind of control methods of dcdc converter, for realizing 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 tube, second switch, first switch tube correspondence
Capacitor, the corresponding capacitor of second switch；The first end of first switch tube capacitor corresponding with the first switch tube
First end connection and the first end as the bridge arm, the second end of the second switch it is corresponding with the second switch
Capacitor second end connection and the second end as the bridge arm, the second end of the first switch tube, the first switch
Manage the first of the second end of corresponding capacitor, the first end of the corresponding capacitor of the second switch and the second switch
End connection and the common end as the bridge arm；Connection unit described in every group include first capacitor, the second capacitor, third capacitor,
First diode, the second diode；First end of the first end of the first capacitor as the connection unit, second electricity
Second end of the second end of appearance as the connection unit, the second end of the first capacitor, the first end of second capacitor,
The anode of the first diode is connected with the cathode of second diode, the cathode of the first diode and the third
The first end of capacitor connects and the third end as the connection unit, the anode of second diode and the third capacitor
Second end connection and the 4th end as the connection unit；The first end of the first end of first bridge arm and the first connection unit
Connection is connect for the anode with the first power supply, and the second end of the second bridge arm is connect with the second end of first connection unit,
For connecting with the cathode of first power supply, the third end of the common end of first bridge arm and first connection unit connects
It connects, the common end of second bridge arm is connect with the 4th end of first connection unit；The first end of third bridge arm and second
The first end of connection unit connects, and connect for the anode with second source, the second end of four bridge legs is connect with described second
The second end of unit connects, for being connect with the cathode of the second source, the common end of the third bridge arm and described second
The third end of connection unit connects, and the common end of the four bridge legs is connect 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 by the second end of inductance and the third bridge arm and
The first end of the four bridge legs connects；
The control method, comprising:
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 lower than second source voltage；
Successively using dcdc converter described in T1, T2 timing control in a control period, in T2 timing control, inspection
Survey inductive current whether zero passage, if so, further including then T3, T4 timing or T7, T8 timing after T2；
When the first supply voltage is higher than second source voltage, the control of T5, T6 timing is successively used in a switch periods
Make the dcdc converter, in T6 timing control, detection inductive current whether zero passage, if so, further including then T3, T4 after T6
Timing or T7, T8 timing or T3, T4 timing；
T1 timing: the first bridge arm, four bridge legs are both turned on, and the second bridge arm, third bridge arm are turned off；
T2 timing: four bridge legs shutdown, and the first bridge arm and the second bridge arm do not simultaneously turn on；
T3 timing: third bridge arm conducting；Second bridge arm, four bridge legs are turned off；
T4 timing: the second bridge arm, third bridge arm are turned off；
T5 timing: the first bridge arm conducting；Second bridge arm, four bridge legs are turned off；
T6 timing: the first bridge arm, four bridge legs are turned off；
T7 timing: the second bridge arm, third bridge arm are both turned on, and the first bridge arm, four bridge legs are turned off；
T8 timing: the second bridge arm is turned off, and third 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 transformation 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,
To be 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, the reliability of system application is improved；
2. loop of power circuit is inconsistent under inductive energy storage state and freewheeling state, is conducive to power tube dispersion heat dissipation, reduces
Cooling requirements improve the reliability of system application；
3. each state of a control, realization energy in bidirectional flow are conducive to system control and stablize；
The symmetrical control of driving, control program are simple.
Detailed description of the invention
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, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of topological diagram of dcdc converter provided in an embodiment of the present invention；
Fig. 2 is to realize that the first power supply puts second source when the first supply voltage is lower than second source voltage in the present invention
One timing diagram of electricity；
Fig. 3 is to realize that the first power supply puts second source when the first supply voltage is lower than second source voltage in the present invention
Another timing diagram of electricity；
Fig. 4 is to realize that the first power supply puts second source when the first supply voltage is lower than second source voltage in the present invention
The another timing diagram of electricity；
Fig. 5 is to realize that the first power supply puts second source when the first supply voltage is higher than second source voltage in the present invention
One timing diagram of electricity；
Fig. 6 is to realize that the first power supply puts second source when the first supply voltage is higher than second source voltage in the present invention
Another timing diagram of electricity；
Fig. 7 is the current flow diagrams of T1 timing in Fig. 3, Fig. 4 of the present invention；
Fig. 8 is a current flow diagrams of T2 timing in Fig. 3, Fig. 4 of the present invention；The current flow diagrams of T5 timing in Fig. 5, Fig. 6；
Fig. 9 is another current flow diagrams of T2 timing in Fig. 3, Fig. 4 of the present invention；The current direction of T6 timing in Fig. 5, Fig. 6
Figure；
Figure 10 is the current flow diagrams of T3 timing in Fig. 3, Fig. 6 of the present invention；A current direction of T8 timing in Fig. 4, Fig. 5
Figure；
Figure 11 is the current flow diagrams of T4 timing in Fig. 3, Fig. 6 of the present invention；A current flow diagrams of T8 timing in Fig. 4, Fig. 5
Figure 12 is the current flow diagrams of T7 timing in Fig. 4, Fig. 5 of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are without making creative work, obtained every other
Embodiment belongs to the scope of the present invention.
Core of the invention is to provide a kind of control method of dcdc converter, for realizing the transformation of direct current, and
Mapping mode multiplicity, while can be realized two-way changing, so that continuous current mode, and it is suitable for high pressure occasion.
In order to enable those skilled in the art to better understand the solution of the present invention, 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
(respectively the first bridge arm, the second bridge arm, third bridge arm and four bridge legs) and 2 groups of connection unit (respectively first connection units
With the second connection unit).
As shown in Figure 1, the first switch tube and second switch in the present invention illustrate by taking IGBT (N-channel) as an example.Certainly
Other than IGBT, or metal-oxide-semiconductor.When first switch tube and second switch are IGBT, then the first of first switch tube
End is collector, and the second end of first switch tube is emitter, and the first end of second switch is collector, second switch
Second end is emitter；If metal-oxide-semiconductor, the first end of first switch tube is drain electrode, the second end of first switch tube
For source electrode, the first end of second switch is drain electrode, and the second end of second switch is source electrode.
It include first switch tube M1-Q1, second switch M1-Q2, the corresponding electricity of first switch tube M1-Q1 in first bridge arm
Hold M1-C1, the corresponding capacitor M1-C2 of second switch；It include first switch tube M2-Q1, second switch M2- in second bridge arm
The corresponding capacitor M2-C1 of Q2, first switch tube M2-Q1, the corresponding capacitor M2-C2 of second switch；It include the in third bridge arm
The corresponding capacitor M3-C1 of one switching tube M3-Q1, second switch M3-Q2, first switch tube M3-Q1, second switch are corresponding
Capacitor M3-C2；It is corresponding including first switch tube M4-Q1, second switch M4-Q2, first switch tube M4-Q1 in four bridge legs
The corresponding capacitor M4-C2 of capacitor M4-C1, second switch.
First connection unit includes first capacitor C1, the second capacitor C2, third capacitor C3, first diode D1, the two or two
Pole pipe D2；Second connection unit includes first capacitor C5, the second capacitor C6, third capacitor C4, first diode D3, the two or two pole
Pipe D4.
Wherein, the first capacitor C1 in the first connection unit, the second capacitor C2 are bus capacitor, first diode D1, the
The effect of two diode D2 is clamper, and third capacitor C3 is bridge joint capacitor or striding capacitance；The first electricity in second connection unit
Holding C5, the second capacitor C6 is bus capacitor, and the effect of first diode D3, the second diode D4 are clampers, and third capacitor C4 is
Bridge capacitor or striding capacitance.
Specific connection relationship is as follows:
1) connection relationship of the first bridge arm is as follows: the collector and first switch of the first switch tube M1-Q1 of the first bridge arm
The first end of the corresponding capacitor M1-C1 of pipe M1-Q1 connects and the first end as the first bridge arm, the hair of second switch M1-Q2
The second end of emitter-base bandgap grading capacitor M1-C2 corresponding with second switch M1-Q2 connects and the second end as the first bridge arm, and first opens
Second end, the second switch M1-Q2 for closing the corresponding capacitor M1-C1 of emitter, first switch tube M1-Q1 of pipe M1-Q1 are corresponding
Capacitor M1-C2 first end and second switch M1-Q2 collector connection and the common end as the first bridge arm.It needs
Illustrate, the corresponding capacitor M1-C2 of first switch tube M1-Q1 corresponding capacitor M1-C1 and second switch M1-Q2 does not have pole
Property point.
2) connection relationship of the second bridge arm is as follows: the collector and first switch of the first switch tube M2-Q1 of the second bridge arm
The first end of the corresponding capacitor M2-C1 of pipe M2-Q1 connects and the first end as the second bridge arm, the hair of second switch M2-Q2
The second end of emitter-base bandgap grading capacitor M2-C2 corresponding with second switch M2-Q2 connects and the second end as the second bridge arm, and first opens
Second end, the second switch M2-Q2 for closing the corresponding capacitor M2-C1 of emitter, first switch tube M2-Q1 of pipe M2-Q1 are corresponding
Capacitor M2-C2 first end and second switch M2-Q2 collector connection and the common end as the second bridge arm.It needs
Illustrate, the corresponding capacitor M2-C2 of first switch tube M2-Q1 corresponding capacitor M2-C1 and second switch M2-Q2 does not have pole
Property point.
3) connection relationship of third bridge arm is as follows: the collector and first switch of the first switch tube M3-Q1 of third bridge arm
The first end of the corresponding capacitor M3-C1 of pipe M3-Q1 connects and the first end as third bridge arm, the hair of second switch M3-Q2
The second end of emitter-base bandgap grading capacitor M3-C2 corresponding with second switch M3-Q2 connects and the second end as third bridge arm, and first opens
Second end, the second switch M3-Q2 for closing the corresponding capacitor M3-C1 of emitter, first switch tube M3-Q1 of pipe M3-Q1 are corresponding
Capacitor M3-C2 first end and second switch M3-Q2 collector connection and the common end as third bridge arm.It needs
Illustrate, the corresponding capacitor M2-C2 of first switch tube M3-Q1 corresponding capacitor M3-C1 and second switch M3-Q2 does not have pole
Property point.
4) connection relationship of four bridge legs is as follows: the collector and first switch of the first switch tube M4-Q1 of four bridge legs
The first end of the corresponding capacitor M4-C1 of pipe M4-Q1 connects and the first end as four bridge legs, the hair of second switch M4-Q2
The second end of emitter-base bandgap grading capacitor M4-C2 corresponding with second switch M4-Q2 connects and the second end as four bridge legs, and first opens
Second end, the second switch M4-Q2 for closing the corresponding capacitor M4-C1 of emitter, first switch tube M4-Q1 of pipe M4-Q1 are corresponding
Capacitor M4-C2 first end and second switch M4-Q2 collector connection and the common end as four bridge legs.It needs
Illustrate, the corresponding capacitor M4-C2 of first switch tube M4-Q1 corresponding capacitor M4-C1 and second switch M4-Q2 does not have pole
Property point.
5) first end of the first end of the first capacitor C1 in the first connection unit as the first connection unit, the second capacitor
Second end of the second end of C2 as the first connection unit, the second end of first capacitor C1, the first end of the second capacitor C2, first
The connection of the cathode of the anode of diode D1 and the second diode D2, the cathode of first diode D1 and the first end of third capacitor C3
It connects and the third end as the first connection unit, the anode of the second diode D2 connect and make with the second end of third capacitor C3
For the 4th end of the first connection unit.
6) first end of the first end of the first capacitor C5 in the second connection unit as the second connection unit, the second capacitor
Second end of the second end of C6 as the second connection unit, the second end of first capacitor C5, the first end of the second capacitor C6, first
The connection of the cathode of the anode of diode D3 and the second diode D4, the cathode of first diode D3 and the first end of third capacitor C4
It connects and the third end as the second connection unit, the anode of the second diode D4 connect and make with the second end of third capacitor C4
For the 4th end of the second connection unit.
7) first end of the first bridge arm is connect with the first end of the first connection unit, is used for and the first power supply (battery pack
Bat anode connection), the second end of the second bridge arm connect with the second end of the first connection unit, are used for and the first power supply (battery
Group Bat) cathode connection, the common end of the first bridge arm connect with the third end of the first connection unit, the common end of the second bridge arm
It is connect with the 4th end of the first connection unit.
8) first end of third bridge arm is connect with the first end of the second connection unit, is used for and second source (photovoltaic system)
Anode connection, the second end of four bridge legs connect with the second end of the second connection unit, is used for and second source (photovoltaic system
System) cathode connection, the common end of third bridge arm connect with the third end of the second connection unit, the common end of four bridge legs and the
4th end of two connection units connects.
9) second end of the first bridge arm is connected with the first end of the second bridge arm, and passes through inductance L1 and the second of third 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
It is not necessarily the only scene shown in FIG. 1, for example, the first power supply can be photovoltaic system, second source is battery pack etc..
For topological structure shown in FIG. 1 by the on and off of the different switching tube of control, can have two-way rise can
Buck functionality, from the angle of control switch pipe, following four transformation is may be implemented in above-mentioned dcdc converter:
1, electric discharge of first power supply to second source is realized when the first supply voltage is lower than second source voltage；
2, electric discharge of first power supply to second source is realized when the first supply voltage is higher than second source voltage；
3, electric discharge of the second source to the first power supply is realized when the first supply voltage is lower than second source voltage；
4, 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 control method converted the invention discloses above four kinds, in order to make those skilled in the art more clear of the invention
The control method of provided dcdc converter makees into one control method below in conjunction with the control sequential and attached drawing of switching tube
Walk explanation.
1, the control of electric discharge of first power supply to second source is realized when the first supply voltage is lower than second source voltage
Method is as follows:
It discharges when needing to control the first power supply second source, and the first supply voltage is lower than second source voltage
When, successively using dcdc converter described in T1, T2 timing control in a switch periods, in T2 timing control, detection electricity
Feel L1 electric current whether zero passage, if so, further including then T3, T4 timing or T7, T8 timing after T2.Wherein the timing of T1~T2 is such as
It is specific as follows shown in Fig. 2:
T1 timing: the first switch tube M1-Q1 of the first bridge arm, the second switch M1-Q2 of the first bridge arm, four bridge legs
The second switch M4-Q2 of first switch tube M4-Q1 and four bridge legs is both turned on, the first switch tube M2-Q1 of the second bridge arm,
The second switch M3-Q2 of the second switch M2-Q2 of two bridge arms, the first switch tube M3-Q1 of third bridge arm and third bridge arm
It is turned off.As shown in fig. 7, battery pack Bat+ (i.e. capacitor C1) passes through the first switch tube of the first bridge arm at this point, current direction is
M1-Q1, the second switch M1-Q2 of the first bridge arm, inductance L1, the first switch tube M4-Q1 of four bridge legs, four bridge legs
Two switching tube M4-Q2 are back to battery pack BAT- (i.e. capacitor C2).The current direction for defining inductance L1 is from left to right electric current " just "
Flow direction, on the contrary it is then for it is " negative " flow to.During being somebody's turn to do, capacitor C1, capacitor C2 discharge, and the electric current of inductance L1 is positive, and electric current
It is gradually increased, inductance L1 energy storage, until T2 timing.
T2 timing: the first switch tube M4-Q1 of four bridge legs, the second switch M4-Q2 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 tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are both turned on
When, as shown in figure 8, at this point, current direction is, inductance L1 passes through the body diode of the second switch M3-Q2 of third bridge arm, the
The body diode of the first switch tube M3-Q1 of three bridge arms, capacitor C5 (i.e. photovoltaic system anode), (i.e. photovoltaic system is negative by capacitor C6
Pole), capacitor C2 (i.e. battery pack Bat-), capacitor C1 (i.e. battery pack Bat+), the first switch tube M1-Q1 of the first bridge arm, first
The second switch M1-Q2 of bridge arm carries out releasing energy to inductance L1.
Second, when the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are turned off
When, as shown in figure 9, at this point, current direction is, inductance L1 passes through the body diode of the second switch M3-Q2 of third bridge arm, the
The body diode of the first switch tube M3-Q1 of three bridge arms, capacitor C5 (i.e. photovoltaic system anode), (i.e. photovoltaic system is negative by capacitor C6
Pole), the body diode of the second switch M2-Q2 of the second bridge arm, the second bridge arm first switch tube M2-Q1 body diode extremely
Inductance L1 carries out releasing energy.
In above 2 kinds of current directions, inductance L1 releases energy, and current direction is positive, and electric current is gradually reduced.Capacitor C5, electricity
Hold C6 bulk charge.
In T2 timing, the second switch M1-Q2 of the first switch tube M1-Q1 and the first bridge arm that control the first bridge arm are equal
Shutdown makes electric current during this pass through the body diode of the second switch M2-Q2 of the second bridge arm, the first switch of the second bridge arm
The body diode of pipe M2-Q1, and in T1 timing, electric current by the first switch tube M1-Q1 of the first bridge arm, the first bridge arm the
Two switching tube M1-Q2.In conjunction with T1 timing and T2 timing, two working sequences are worked respectively on the first bridge arm and the second bridge arm,
The working stress of switching tube is helped to disperse, and is conducive to heat dissipation.Therefore, above-mentioned second of electric current stream is preferably used in T2 timing
To.
In T1, T2 timing, it is equivalent to and realizes that the first power supply boosts to the BOOST of second source, the first of four bridge legs opens
The second switch M4-Q2 of pass pipe M4-Q1 and four bridge legs is equivalent to the high-frequency tube of BOOST circuit.When the first of four bridge legs
When the duty of the second switch M4-Q2 of switching tube M4-Q1 and four bridge legs is bigger, i.e., T1 timing service time is longer, T2
Timing service time is shorter, at this point, the electric current of inductance L1 is continuous in T1 and T2 timing, and is positive direction, such as Fig. 2 institute
Show；When duty ratio 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 period
Begin, inductance L1 starts energy storage again, and inductive current increases, as critical current mode；When duty ratio further decreases, i.e., in T2
Inductive current gradually decreases to 0, but switch periods and is not finished in timing, further includes following T3 and T4 for the situation
Timing or T7, T8 timing.When further including T3, T4 timing after T1, T2 timing, as shown in Figure 3.
T3 timing: the first switch tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are both turned on, the
The first switch tube M2-Q1 of two arms and the second switch 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. capacitor C5) pass through the first switch tube M3-Q1 of third bridge arm, the second switch of third bridge arm
M3-Q2, inductance L1, the body diode of the second switch M1-Q2 of the first bridge arm, the first bridge arm first switch tube M1-Q1
Body diode, capacitor C1 (i.e. battery pack Bat+), capacitor C2 (i.e. battery pack Bat-) are back to photovoltaic system cathode (i.e. capacitor C6).
In this process, capacitor C5, capacitor C6 discharge, capacitor C1, capacitor C2 bulk charge, inductance L1 energy storage, and electric current increases, but electric current
Direction is negative.
T4 timing: the first switch tube M3-Q1 of third bridge arm, the second switch M3-Q2 of third bridge arm, the second bridge arm
The second switch M2-Q2 of first switch tube M2-Q1 and the second bridge arm is turned off.As shown in figure 11, at this point, inductance L1 passes through the
The body diode of the second switch M1-Q2 of one bridge arm, the body diode of the first switch tube M1-Q1 of the first bridge arm, capacitor C1
(i.e. battery pack Bat+), capacitor C2 (i.e. battery pack Bat-), four bridge legs second switch M4-Q2 body diode, the 4th
The body diode of the first switch tube 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.Capacitor C1, capacitor C2 bulk charge.
In conjunction with above-mentioned T1~T4 electric current it is found that in switch periods, the electric current of inductance L1 is continuous always.One switch week
It is interim, it to control the first power supply (i.e. battery pack BAT) and 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 greater 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, it when the first supply voltage is lower than second source voltage, is used before the current over-zero of inductance L1
Dcdc converter described in T3 timing control.Specifically, making first switch tube M3-Q1, the third bridge arm of third bridge arm in T2 timing
Second switch M3-Q2 be both turned on, first switch tube M2-Q1, the second switch M2-Q2 of the second bridge arm of the second bridge arm are equal
Shutdown.At this point, the electric current of inductance L1 be timing, electric current still through the second switch M3-Q2 of third bridge arm body diode
It is formed into a loop with the body diode of the first switch tube M3-Q1 of third bridge arm, the current direction phase of current direction and original T2 timing
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 avoid in T2
T3 timing is caused to fail to be controlled in time with the switching of T3 timing.
Further, T4 timing further includes the second switch of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
The second switch M4-Q2 of M1-Q2, the first switch tube M4-Q1 of four bridge legs and four bridge legs are both turned on.At this point, working as inductance
When the electric current of L1 is negative, current direction is identical as the original current direction of T4 timing, as shown in figure 11；When the electric current of inductance L1 reduces
When to 0, next switch periods T1 timing control can be immediately begun to, thus can avoid switching in T4 and next switch periods T1 timing
T1 timing is caused to fail to be controlled in time.
Further, T2 and T3 timing further includes the first switch tube M1-Q1 shutdown of the first bridge arm.When in conjunction with above T1~T4
Sequence is it is found that the second switch M1-Q2 of the first bridge arm and the first switch tube M2-Q1 of the second bridge arm are equal in entire switch periods
It is held off, and the first switch tube M3-Q1 of the first driving signal of the first switch tube M1-Q1 of the first bridge arm and third bridge arm
The second driving signal reverse phase, driving circuit can be simplified, at the same can reduce switching tube loss.
In another embodiment, T2 and T3 timing further includes the first switch tube M1-Q1 conducting of the first bridge arm.In conjunction with the above T1
~T4 timing is it is found that the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are all in entire switch
Interim to be held on, the first switch tube M2-Q1 of the second bridge arm and the second switch 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 timing after T1, T2 timing, as shown in Figure 4.
T7 timing: the first switch tube M3-Q1 of third bridge arm, the second switch M3-Q2 of third bridge arm, the second bridge arm
The second switch M2-Q2 of first switch tube M2-Q1 and the second bridge arm is both turned on, the first switch tube M4-Q1 of four bridge legs,
The second switch M1-Q2 of the second switch M4-Q2 of four bridge legs, the first switch tube 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. capacitor C5) is opened by the first of third bridge arm
Close pipe M3-Q1, the second switch M3-Q2 of third bridge arm, inductance L1, the first switch tube M2-Q1 of the second bridge arm, the second bridge arm
Second switch M2-Q2 be back to photovoltaic system cathode (i.e. capacitor C6).In this process, capacitor C5, capacitor C6 discharge, electricity
Feel L1 energy storage, electric current increases, but current direction is negative.
T8 timing: the first switch tube M2-Q1 of the second bridge arm and the second switch 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 tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are both turned on,
When the second switch M4-Q2 of four bridge legs and the first switch tube M4-Q1 of four bridge legs are turned off, as shown in Figure 10, at this point,
Current direction is that inductance L1 passes through the body diode of the second switch M1-Q2 of the first bridge arm, the first switch tube of the first bridge arm
(i.e. photovoltaic system is negative by body diode capacitor C1 (i.e. battery pack BAT+), capacitor C2 (i.e. battery pack BAT-), the capacitor C6 of M1-Q1
Pole), capacitor C5 (i.e. photovoltaic system anode), the first switch tube M3-Q1 of third bridge arm, third bridge arm second switch M3-
Q2 is back to inductance L1 and carries out releasing energy.
Second, when the first switch tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are turned off,
As shown in figure 11, at this point, current direction is, inductance L1 passes through the body diode of the second switch M1-Q2 of the first bridge arm, first
Body diode capacitor C1 (i.e. battery pack BAT+), the capacitor C2 (i.e. battery pack BAT-), the 4th of the first switch tube M1-Q1 of bridge arm
The body diode of the second switch M4-Q2 of bridge arm, the body diode of the first switch tube M4-Q1 of four bridge legs are back to inductance L1
It carries out releasing energy.
In above 2 kinds of current flow diagrams, inductance L1 releases energy, and current direction is negative, and electric current is gradually reduced.Capacitor C1,
Capacitor C2 bulk charge.
In T8 timing, the first switch tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are turned off
When, which passes through the body diode of the second switch M4-Q2 of four bridge legs, the first switch tube M4- of four bridge legs
The body diode of Q1, and in T7 timing, the second switch of the first switch tube M3-Q1 of electric current third bridge arm, third bridge arm
M3-Q2, in conjunction with T7 timing and T8 timing, two working sequences are worked respectively on the switching tube of different bridge arms, are helped to disperse
The working stress of switching tube, and it is conducive to heat dissipation.Therefore, preferably using above-mentioned second flow direction in T8 timing.
In conjunction with above-mentioned T1, T2, T7, T8 electric current it is found that in switch periods, inductive current is continuous always.
Further, using dcdc converter described in T7 timing control before the current over-zero of inductance L1.Specifically,
T2 timing opens the first switch tube M2-Q1 of the second bridge arm, the second switch M2-Q2 of the second bridge arm, third bridge arm first
Close pipe M3-Q1, the second switch M3-Q2 of third 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 timing 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 control, thus can avoid switching in T2 and T7 timing causes T7 timing to fail to be controlled in time.
Further, T8 timing further includes the second switch of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
The second switch M4-Q2 of M1-Q2, the first switch tube M4-Q1 of four bridge legs and four bridge legs are both turned on, and the of third bridge arm
The second switch M3-Q2 of one switching tube M3-Q1 and third bridge arm is turned off.At this point, when the electric current of inductance L1 is negative, electric current
Flow direction is identical as the original current direction of T8 timing, 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 leading to T1 timing not in T8 and the switching of next switch periods T1 timing
It can be controlled in time.
Further, T8 timing further includes the first switch tube M1-Q1 of the first bridge arm and the second switch of the first bridge arm
M1-Q2 is turned off.In conjunction with above T1, T2, T7, T8 timing it is found that the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
Second switch M1-Q2, the first switch tube M4-Q1 of four bridge legs, four bridge legs second switch M4-Q2 be all made of first
Driving signal, the first switch tube M2-Q1 of the second bridge arm, the second switch M2-Q2 of the second bridge arm, third bridge arm first are opened
Close pipe M3-Q1, the second switch M3-Q2 of third bridge arm is all made of the second driving signal, and the first driving signal is driven with second
Dynamic signal inversion, can simplify driving circuit.
2, 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:
It discharges when needing to control the first power supply second source, and the first supply voltage is higher than second source voltage
When, successively using dcdc converter described in T5, T6 timing control in a switch periods, in T6 timing control, detection electricity
Feel L1 electric current whether zero passage, if so, further including then T7, T8 timing or T3, T4 timing after T6.After T5, T6 timing also
When including T7, T8 timing, as shown in figure 5, specific as follows:
T5 timing: the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are both turned on, the
The first switch tube M4-Q1 of four bridge legs and the second switch M4-Q2 of four bridge legs are turned off.As shown in figure 8, at this point, electric current
Flow direction is that battery pack Bat+ (i.e. capacitor C1) passes through the first switch tube M1-Q1 of the first bridge arm, the second switch of the first bridge arm
M1-Q2, inductance L1, the body diode of the second switch M3-Q2 of third bridge arm, third bridge arm first switch tube M3-Q1
Body diode, capacitor C5 (i.e. photovoltaic system anode), capacitor C6 (i.e. photovoltaic system cathode) are back to battery pack BAT- (i.e. capacitor
C2).Similarly, define inductance L1 current direction be from left to right electric current " just " flow direction, on the contrary it is then for electric current it is " negative " flow to.It should
In the process, inductance L1 electric current is positive, and electric current is gradually increased, inductance L1 energy storage, until T6 timing.In this process, capacitor
C1, capacitor C2 discharge, capacitor C5, capacitor C6 bulk charge.
T6 timing: the first switch tube M1-Q1 of the first bridge arm, the second switch M1-Q2 of the first bridge arm, four bridge legs
The second switch M4-Q2 of first switch tube M4-Q1 and four bridge legs is turned off.As shown in figure 9, at this point, current direction is, electricity
Feel L1 and passes through two pole of body of the body diode of the second switch M3-Q2 of third bridge arm, the first switch tube M3-Q1 of third bridge arm
Pipe, capacitor C5 (i.e. photovoltaic system anode), capacitor C6 (i.e. photovoltaic system cathode), the second bridge arm second switch M2-Q2
Body diode, the second bridge arm the body diode of first switch tube M2-Q1 be back to inductance L1 and carry out releasing energy.In this process, electric
Sense L1 releases energy, and current direction is positive, and electric current is gradually reduced.Capacitor C5, capacitor C6 bulk charge.
In T5, T6 timing, 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 M2-Q2 of pipe M1-Q1 and the second bridge arm is equivalent to the high-frequency tube of BUCK circuit.When the first switch of the first bridge arm
When the duty of the second switch M2-Q2 of pipe M1-Q1 and the second bridge arm is bigger, i.e. T5 timing service time is longer, T6 timing
Service time is shorter, at this point, the electric current of inductance L1 is continuous in T5 and T6 timing, and is positive direction；When duty ratio subtracts
It is small to certain value when, for electric current to 0, lucky next period, inductance starts energy storage to inductive current again at the end of switch periods,
Inductive current increases, as critical current mode；When duty ratio further decreases, i.e., inductive current gradually subtracts in T6 timing
Small to 0, but one switch periods are simultaneously not finished, and further include following T7 and T8 timing, as shown in Figure 5 for the situation.
T7, T8 timing are as described above, details are not described herein.
In conjunction with above-mentioned T5~T8 electric current it is found that in switch periods, inductive current is continuous always.
Further, it when the first supply voltage is higher than second source voltage, is used before the current over-zero of inductance L1
Dcdc converter described in T7 timing control.Specifically, making first switch tube M2-Q1, the second bridge of the second bridge arm in T6 timing
The second switch M3-Q2 of the second switch M2-Q2 of arm, the first switch tube M3-Q1 of third bridge arm and third bridge arm are led
It is logical.At this point, the electric current of inductance L1 is timing, current direction is identical as the original current direction of T6 timing, 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 switching in T6 and T7 timing leads to T7 timing not
It can be controlled in time.
Further, T8 timing further includes the first switch tube M1-Q1 of the first bridge arm and the second switch of the first bridge arm
M1-Q2 is both turned on, and the first switch tube M4-Q1 of four bridge legs and the second switch M4-Q2 of four bridge legs are turned off.At this point,
When the electric current of inductance L1 is negative, current direction is identical as the original current direction of T8 timing, 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 avoid in T8 and next switch week
The switching of phase T5 timing causes T5 timing to fail to be controlled in time.
Further, T5 timing and T8 timing further include third bridge arm first switch tube M3-Q1 and third bridge arm
Two switching tube M3-Q2 are turned off.In conjunction with above T5~T8 timing it is found that the first switch tube M4-Q1 and the 4th bridge of four bridge legs
The second switch M4-Q2 of arm is held off in entire switch periods, and the first switch tube M1-Q1 and first of the first bridge arm
The second switch M1-Q2 of bridge arm is all made of the first driving signal, the first switch tube M2-Q1 of the second bridge arm, the second bridge arm
The second switch M3-Q2 of second switch M2-Q2, the first switch tube M3-Q1 of third bridge arm and third bridge arm are all made of
Two driving signal, and the first driving signal and the second driving signal reverse phase, can simplify driving circuit, while can reduce switching tube damage
Consumption.
In another embodiment, T5 timing and T8 timing further include the first switch tube M3-Q1 and third bridge of third bridge arm
The second switch M3-Q2 of arm is both turned on.In conjunction with above T5~T8 timing it is found that the first switch tube M4-Q1 of four bridge legs and
The second switch M4-Q2 of four bridge legs is held off in entire switch periods, the first switch tube M3-Q1 of third bridge arm and
The second switch M3-Q2 of third bridge arm is held in entire switch periods；And first bridge arm first switch tube M1-Q1
The first driving signal, the first switch tube M2-Q1 of the second bridge arm and second are all made of with the second switch M1-Q2 of the first bridge arm
The second switch M2-Q2 of bridge arm is all made of the second driving signal, and the first driving signal and the second driving signal reverse phase, can letter
Change driving circuit, while switching tube loss can be reduced.
When further including T3, T4 timing after T5, T6 timing, as shown in fig. 6, T5, T6, T3, T4 timing, that is, current direction
As described above, details are not described herein.
Further, it when the first supply voltage is higher than second source voltage, is used before the current over-zero of inductance L1
Dcdc converter described in T3 timing control.Specifically, making the first switch tube M3-Q1 and third bridge arm of third bridge arm in T6 timing
Second switch M3-Q2 be both turned on, the first switch tube M2-Q1 of the second bridge arm and the second switch 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 M3-Q2 of third bridge arm two pole of body
It manages, the body diode of the first switch tube M3-Q1 of third bridge arm carries out releasing energy, the current direction phase of current direction and original T6 timing
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 avoid in T6 and T3
Timing switching causes T3 timing to fail to be controlled in time.
Further, T4 timing further includes the first switch tube M1-Q1 of the first bridge arm and the second switch of the first bridge arm
M1-Q2 is both turned on, and the first switch tube M4-Q1 of four bridge legs and the second switch M4-Q2 of four bridge legs are turned off.At this point,
When the electric current of inductance L1 is negative, current direction is identical as the original current direction of T4 timing, 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 avoid in T4 and next switch periods T5
Sequence switching causes T5 timing to fail to be controlled in time.
Further, T5 timing further includes the first switch tube M3-Q1 of third bridge arm and the second switch of third bridge arm
M3-Q2 is turned off, and T3 timing further includes the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm
It is turned off.In conjunction with above T5, T6, T3, T4 timing it is found that the first switch tube M2-Q1 of the second bridge arm, the second of the second bridge arm open
The second switch M4-Q2 of pipe M2-Q2, the first switch tube M4-Q1 of four bridge legs and four bridge legs are closed in entire switch periods
In be held off, and the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are all made of the first drive
Dynamic signal, the first switch tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are all made of the second driving letter
Number, and the first driving signal and the second driving signal reverse phase, driving circuit can be simplified, while switching tube loss can be reduced.
In above-mentioned control method, the first switch tube and second switch of each bridge arm are simultaneously turned on and are turned off, in reality
In the application of border, there is a timing when can control the first switch tube and second switch on or off of same bridge arm as needed
Long lag or lead.Especially when turning off the first switch tube and second switch of same bridge arm, same bridge arm is controlled
Outer tube (the i.e. first switch of the first switch tube M1-Q1 of the first bridge arm, the second switch M2-Q2 of the second bridge arm, third bridge arm
The second switch M4-Q2 of pipe M3-Q1, four bridge legs) it is first turned off, avoid battery voltage or photovoltaic system voltage from being 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, it is able to achieve first
Power supply discharges to second source, i.e. realization 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.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.Specific as follows: the first switch tube M1-Q1 of the first bridge arm is corresponding
The first switch tube M3-Q1 of third bridge arm；The second switch M1-Q2 of first bridge arm corresponds to the second switch of third bridge arm
M3-Q2；The first switch tube M4-Q1 of the corresponding four bridge legs of the first switch tube M2-Q1 of second bridge arm；The second of second bridge arm opens
Close the second switch M4-Q2 of the corresponding four bridge legs of pipe M2-Q2.The specific control method is as follows.
3, electric discharge of the second source to the first power supply is realized when the first supply voltage is lower than second source voltage.
It discharges when needing to control second source the first power supply, and second source voltage is lower than the first supply voltage
When, successively using dcdc converter described in T1', T2' timing control in a switch periods, in T2' timing control, detection
Inductance L1 electric current whether zero passage, if so, further including then T3', T4' timing or T7', T8' timing after T2'.Wherein T1 '~T4 ',
T7', T8' timing, specific as follows:
T1' timing: the first switch tube M3-Q1 of third bridge arm, the second switch M3-Q2 of third bridge arm, the second bridge arm
First switch tube M2-Q1 and the second switch M2-Q2 of the second bridge arm be both turned on, the first switch tube M4-Q1 of four bridge legs,
The second switch M1- of the second switch M4-Q2 of four bridge legs, the first switch tube M1-Q1 of the first bridge arm and the first bridge arm
Q2 is turned off；
T2' timing: the first switch tube M2-Q1 of the second bridge arm, the second switch M2-Q2 of the second bridge arm are turned off, and
Third bridge arm and four bridge legs do not simultaneously turn on；
T3' timing: the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are both turned on, the
The first switch tube M4-Q1 of four arms and the second switch M4-Q2 of four bridge legs are turned off；
T4' timing: second switch M1-Q2, the four bridge legs of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
First switch tube M4-Q1 and the second switch M4-Q2 of four bridge legs be turned off；
T7 ' timing: second switch M1-Q2, the four bridge legs of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
First switch tube M4-Q1 and the second switch M4-Q2 of four bridge legs be both turned on, the first switch tube M2-Q1 of the second bridge arm,
The second switch M3- of the second switch M2-Q2 of second bridge arm, the first switch tube M3-Q1 of third bridge arm and third bridge arm
Q2 is turned off；
T8 ' timing: the first switch tube M4-Q1 of four bridge legs and the second switch M4-Q2 of four bridge legs are turned off, and
Third bridge arm and four bridge legs do not simultaneously turn on；
4, electric discharge of the second source to the first power supply is realized when the first supply voltage is higher than second source voltage
It discharges when needing to control second source the first power supply, and second source voltage is higher than the first supply voltage
When, successively using dcdc converter described in T5 ', T6 ' timing control in a switch periods, in T6 ' timing control, detection
The electric current of inductance L1 whether zero passage, if so, further including then T7 ', T8 ' timing or T3 ', T4 ' timing after T6 '；Wherein T5 '~
T8 ', T3 ', T4 ' timing, specific as follows:
T5 ' timing: the first switch tube M3-Q1 of third bridge arm and the second switch M3-Q2 of third bridge arm are both turned on, the
The first switch tube M2-Q1 of two bridge arms and the second switch M2-Q2 of the second bridge arm are turned off；
T6 ' timing: the first switch tube M3-Q1 of third bridge arm, the second switch M3-Q2 of third bridge arm, the second bridge arm
First switch tube M2-Q1 and the second switch M2-Q2 of the second bridge arm be turned off；
T7 ' timing: second switch M1-Q2, the four bridge legs of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
First switch tube M4-Q1 and the second switch M4-Q2 of four bridge legs be both turned on, the first switch tube M2-Q1 of the second bridge arm,
The second switch M3- of the second switch M2-Q2 of second bridge arm, the first switch tube M3-Q1 of third bridge arm and third bridge arm
Q2 is turned off；
T8 ' timing: the first switch tube M4-Q1 of four bridge legs and the second switch M4-Q2 of four bridge legs are turned off, and
Third bridge arm and four bridge legs do not simultaneously turn on；
T3' timing: the first switch tube M1-Q1 of the first bridge arm and the second switch M1-Q2 of the first bridge arm are both turned on, the
The first switch tube M4-Q1 of four arms and the second switch M4-Q2 of four bridge legs are turned off；
T4' timing: second switch M1-Q2, the four bridge legs of the first switch tube M1-Q1 of the first bridge arm, the first bridge arm
First switch tube M4-Q1 and the second switch M4-Q2 of four bridge legs be turned off；
It discharges likewise, second source ought be controlled the first power supply, that is, controls the first power supply and charge, can incite 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 is passed in specification
Into mode describe, each embodiment focuses on the differences from other embodiments, phase between each embodiment
It may refer to each other with similar portion.For the device disclosed in the embodiment, since it is opposite with method disclosed in embodiment
It answers, so being described relatively 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 with several improvements and modifications are made to the present invention,
These improvements and modifications also fall within the scope of protection of the claims of 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, 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.
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 tube, second switch, the corresponding capacitor of first switch tube, second switch correspondence
Capacitor；The first end of the first end of first switch tube capacitor corresponding with the first switch tube connects and as described
The second end of the first end of bridge arm, the second end of second switch capacitor corresponding with the second switch connects and makees
For the second end of the bridge arm, the second end of the first switch tube, the second end of the corresponding capacitor of the first switch tube, institute
State the first end connection of the first end and the second switch of the corresponding capacitor of second switch and as the bridge arm
Common end；
Connection unit described in every group includes first capacitor, the second capacitor, third capacitor, first diode, the second diode；It is described
First end of the first end of first capacitor as the connection unit, the second end of second capacitor is as the connection unit
Second end, the second end of the first capacitor, the first end of second capacitor, the anode of the first diode and described
The cathode of second diode connects, and the cathode of the first diode is connect and with the first end of the third capacitor as described
The third end of connection unit, the anode of second diode connect with the second end of the third capacitor and as the connections
4th end of unit；
The first end of first bridge arm is connect with the first end of the first connection unit, is connect for the anode with the first power supply, second
The second end of bridge arm is connect with the second end of first connection unit, described for connecting with the cathode of first power supply
The common end of first bridge arm is connect with the third end of first connection unit, the common end of second bridge arm and described first
4th end of connection unit connects；
The first end of third bridge arm is connect with the first end of the second connection unit, is connect for the anode with second source, the 4th
The second end of bridge arm is connect with the second end of second connection unit, described for connecting with the cathode of the second source
The common end of third bridge arm is connect with the third end of second connection unit, the common end of the four bridge legs and described second
4th end of connection unit connects；
The second end of first bridge arm is connected with the first end of second bridge arm, and passes through inductance and the third 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 lower than second source voltage；
Successively using dcdc converter described in T1, T2 timing control in a control period, in T2 timing control, detection electricity
Inducing current whether zero passage, if so, then successively executing T3, T4 timing after T2, or successively execute T7, T8 timing；
When the first supply voltage is higher than second source voltage, T5, T6 timing control institute are successively used in a switch periods
State dcdc converter, in T6 timing control, detection inductive current whether zero passage, if so, when then successively executing T3, T4 after T6
Sequence, or successively execute T7, T8 timing；
T1 timing: the first bridge arm, four bridge legs are both turned on, and the second bridge arm, third bridge arm are turned off；
T2 timing: four bridge legs shutdown, and the first bridge arm and the second bridge arm do not simultaneously turn on；
T3 timing: third bridge arm conducting；Second bridge arm, four bridge legs are turned off；
T4 timing: the second bridge arm, third bridge arm are turned off；
T5 timing: the first bridge arm conducting；Second bridge arm, four bridge legs are turned off；
T6 timing: the first bridge arm, four bridge legs are turned off；
T7 timing: the second bridge arm, third bridge arm are both turned on, and the first bridge arm, four bridge legs are turned off；
T8 timing: the shutdown of the second bridge arm, and third 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 successively T1, T2, T3, T4 timing,
Using dcdc converter described in T3 timing control before inductive current zero passage；When switch periods are successively T1, T2, T7, T8
When sequence, using dcdc converter described in T7 timing control before inductive current zero passage；When switch periods be successively T5, T6, T7,
When T8 timing, using dcdc converter described in T7 timing control before inductive current zero passage；When switch periods be successively T5,
When T6, T3, T4 timing, using dcdc converter described in T3 timing control before inductive current zero passage.
3. control method according to claim 1, it is characterised in that: when switch periods are successively T1, T2, T3, T4 timing,
T2 timing further includes the conducting of third bridge arm, the shutdown of the second bridge arm；When switch periods are successively T1, T2, T7, T8 timing, when T2
Sequence further includes that the second bridge arm, third bridge arm are both turned on；When switch periods are successively T5, T6, T7, T8 timing, T6 timing is also wrapped
Include the second bridge arm, third bridge arm is both turned on；When switch periods are successively T5, T6, T3, T4 timing, T6 timing further includes third
Bridge arm conducting, the shutdown of the second bridge arm.
4. control method according to claim 3, it is characterised in that: when switch periods are successively T1, T2, T3, T4 timing,
T4 timing further includes that the first bridge arm, four bridge legs are both turned on；When switch periods are successively T1, T2, T7, T8 timing, T8 timing
It further include that the first bridge arm, four bridge legs are both turned on, the shutdown of third bridge arm；When switch periods are successively T5, T6, T7, T8 timing,
T8 timing further includes the conducting of the first bridge arm, four bridge legs shutdown；When switch periods are successively T5, T6, T3, T4 timing, when T4
Sequence further includes the conducting of the first bridge arm, four bridge legs shutdown.
5. control method according to claim 4, it is characterised in that: T2 timing further includes the shutdown of the first bridge arm, and T8 timing is also
It is turned off including third bridge arm.
6. control method according to claim 5, it is characterised in that: T3 timing further includes the conducting of the first bridge arm；T5 timing is also
It is connected including third bridge arm.
7. any one of -5 control method according to claim 1, it is characterised in that: the first driving signal of the first bridge arm and the
Second driving signal reverse phase of three bridge arms.
8. control method according to claim 7, it is characterised in that: when switch periods are successively T1, T2, T7, T8 timing,
First bridge arm and four bridge legs are all made of the first driving signal, and the second bridge arm and third bridge arm are all made of the second driving signal；When
When switch periods are successively T1~T4 timing, the second bridge arm is held off in a switch periods；When switch periods are successively
When T5~T8 timing, four bridge legs are held off in a switch periods；When switch periods are successively T5, T6, T3, T4 timing
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 tube and the second switch are
IGBT or metal-oxide-semiconductor.
10. control method according to claim 1, it is characterised in that: the corresponding capacitor of the first switch tube and described
The parameter of the corresponding capacitor of two switching tubes is all the same.
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| CN201711406133.9A CN108054919B (en) | 2017-12-22 | 2017-12-22 | A kind of control method of dcdc converter |
| US16/229,922 US20190199226A1 (en) | 2017-12-22 | 2018-12-21 | Voltage converting device and method of controlling the voltage converting device |
| PCT/CN2018/122900 WO2019120302A1 (en) | 2017-12-22 | 2018-12-21 | Voltage converting device and method of controlling voltage converting device |
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| 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 |
| 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 |
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 |
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