CN106208710A - A kind of two-way DC DC transducer and control method - Google Patents
A kind of two-way DC DC transducer and control method Download PDFInfo
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- CN106208710A CN106208710A CN201610559514.XA CN201610559514A CN106208710A CN 106208710 A CN106208710 A CN 106208710A CN 201610559514 A CN201610559514 A CN 201610559514A CN 106208710 A CN106208710 A CN 106208710A
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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
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
-
- 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
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of two-way DC DC transducer and control method, including the first switching network and second switch network, the first port of described first switching network connects the first power supply, and the second port of described second switch network connects second source；Wherein, the voltage of described first power supply is less than the voltage of described second source, and described two-way DC DC transducer also includes: transformator, for mutually being transmitted by the energy of its first side and the second side；First side of described transformator is by the first switching network described in inductance connection, and the second side of described transformator is by second switch network described in electric capacity and inductance connection.The second side that electric capacity is arranged at transformator can reduce the requirement of scope pressure to electric capacity, reduces electric capacity number in parallel, thus saves the cost of two-way DC DC transducer；Simple for structure, it is simple to detect and safeguard.
Description
Technical field
The present invention relates to Technics of Power Electronic Conversion technical field, be specifically related to a kind of bi-directional DC-DC converter and control method.
Background technology
DC transducer is a kind of galvanic equipment of required another kind that is converted to by unidirectional current, i.e. little for big voltage electricity
The DC converter transform that enters through of stream becomes the big electric current of small voltage or is transformed into by the changer that enters through of big for small voltage electric current
Big voltage small area analysis.Because all using one-way conduction device on the main power transmission channel in general unidirectional DC transducer
Part, therefore the energy direction of transfer of DC transducer can only be a direction, it is not possible to back transfer.And in other field, as
Space power system, electric automobile and direct current uninterruptible power system etc., being required for energy in these fields can two-way flow
DC transducer.
Existing bi-directional DC-DC converter, as Chinese patent literature CN 102201739 B discloses a kind of symmetrical half bridge
LLC resonant mode two-way DC-DC converter, when this changer carries out forward power pick-up, the annexation of switching network is such as
Under: the V11 switching tube of inverse parallel VD11 fast recovery diode is connected with the V12 switching tube of inverse parallel VD12 fast recovery diode,
Then in parallel with Udc1 voltage source and C10 filter capacitor；The annexation of resonant network is as follows: VD13 Diode series VD14
Diode, VD15 Diode series VD16 diode, C11 split resonant capacitance series connection C12 split resonant capacitance, above-mentioned three is also
Connection forms loop, a termination VD15 diode, VD16 diode, C11 split resonant capacitance and the C12 split of L11 resonant inductance
The common node of resonant capacitance, its another termination VD13 diode, VD14 diode and the common node of Lm former limit magnetizing inductance；
Lm former limit magnetizing inductance connects V11 switching tube and the common node of V12 switching tube；The annexation of commutator-laod network is such as
Under: VD21 diode, VD22 diode, VD23 diode and VD24 diode composition single-phase full bridge commutator loop, then with
Udc2 voltage source and C20 filter capacitor are in parallel.
The electronic devices and components that above-mentioned bi-directional DC-DC converter is used are more, and it is relatively costly；Structure is complicated, and circuit is examined
Survey and maintenance cost is higher.
Summary of the invention
The technical problem to be solved in the present invention is to overcome in prior art the electronic devices and components of bi-directional DC-DC converter relatively
Defect many, baroque.
To this end, the present invention provides a kind of bi-directional DC-DC converter, including the first switching network and second switch network, institute
The first port stating the first switching network connects the first power supply, and the second port of described second switch network connects second source；
Wherein, the voltage of described first power supply is less than the voltage of described second source, and described bi-directional DC-DC converter also includes: transformation
Device, for mutually transmitting the energy of its first side and the second side；Inductance connection institute is passed through in first side of described transformator
Stating the first switching network, the second side of described transformator is by second switch network described in electric capacity and inductance connection.
Preferably, described first switching network includes switch module SD1, SD2, SD3, SD4；Described SD1 and described SD3 goes here and there
Connection, described SD2 connects with described SD4, and the second connection end of described SD1 is connected end and connects with the first of described SD3, described SD2
Second connection end be connected with the first of described SD4 end connection；The first connection end of described SD1 is connected with the first of described SD2
End connects, and connects the positive pole of described first power supply；The second connection end of described SD3 is connected end and connects with the second of described SD4,
And connect the negative pole of described first power supply；Described second switch network includes switch module SD5, SD6, SD7, SD8；Described SD5
Connecting with described SD7, described SD6 connects with described SD8, and the second connection end of described SD5 is connected end even with the first of described SD7
Connecing, the second connection end of described SD6 is connected end and connects with the second of described SD8；The first connection end of described SD5 and described SD6
The first connection end connect, and connect the positive pole of described second source；The second connection end of described SD7 and the second of described SD8
Connect end to connect, and connect the negative pole of described second source；First connection end of the first side of described transformator is by inductance Lr1
Connecting the second connection end of described SD1, the second connection end of the first side of described transformator connects second connection of described SD2
End；First connection end of the second side of described transformator connects the second connection end of described SD5, described transformation by inductance Lr2
Second connection end of the second side of device connects the second connection end of described SD6 by electric capacity Cr；First side of described transformator
It is Same Name of Ends that the first of first the second side connecting end and described transformator is connected end.
Preferably, described switch module includes switching tube and diode, and described switching tube is in parallel with described diode reverse.
Preferably, described switching tube includes audion or metal-oxide-semiconductor.
Preferably, this bi-directional DC-DC converter also includes: controller, connect respectively described switch module SD1, SD2,
SD3, SD4, SD5, SD6, SD7, SD8 the 3rd connection end, for according to electric energy conversion direction control described switch module SD1,
The switching tube Guan Bi of SD2, SD3, SD4, SD5, SD6, SD7, SD8 or disconnection.
Correspondingly, the embodiment of the invention discloses a kind of electric energy that controls to change to described second source from described first power supply
Method, in the controller of above-mentioned bi-directional DC-DC converter, described method includes: control described SD1's and described SD4
Switching tube closes, the switching tube Guan Bi of the most described SD8；Control the switching tube Guan Bi of described SD1 and described SD4, the most described
The switching tube of SD8 disconnects；Control the switching tube Guan Bi of described SD2 and described SD3, the switching tube Guan Bi of the most described SD7；Control
The switching tube Guan Bi of described SD2 and described SD3, the switching tube of the most described SD7 disconnects.
Preferably, the control signal of the switching tube of described SD1, SD2, SD3, SD4 is the square wave of fixed duty cycle, described
The control signal dutycycle of the switching tube of SD7 and described SD8 is adjustable.
Preferably, described SD1 is identical with the control signal of described SD4；The control of the switching tube of described SD2 and described SD3
Signal is identical, and complementary with the control signal of described SD1 and described SD4.
Preferably, the control signal frequency of the switching tube of described SD1, SD2, SD3, SD4 is
The embodiment of the invention also discloses and a kind of control electric energy from described second source to the side of described first Power convert
Method, in the controller of above-mentioned bi-directional DC-DC converter, described method includes: control described SD6 and the switch of described SD7
Pipe closes, the switching tube Guan Bi of the most described SD2 and described SD3；Control the switching tube Guan Bi of described SD6, the switch of described SD7
Pipe disconnects, the switching tube Guan Bi of the most described SD2 and described SD3；Control the switching tube Guan Bi of described SD5 and described SD8, simultaneously
The switching tube Guan Bi of described SD1 and described SD4；Control the switching tube Guan Bi of described SD5, the switching tube of described SD8 disconnects, simultaneously
The switching tube Guan Bi of described SD1 and described SD4.
Preferably, the control signal of the switching tube of described SD5 and SD6 is the square wave of fixed duty cycle, described SD7 and SD8
The control signal dutycycle of switching tube adjustable.
Preferably, described SD1 is identical with the control signal of described SD4；The control of the switching tube of described SD2 and described SD3
Signal is identical, and complementary with the control signal of described SD1 and described SD4.
Preferably, the control signal frequency of the switching tube of described SD1, SD2, SD3, SD4 is
Technical solution of the present invention, has the advantage that
1. the bi-directional DC-DC converter that the embodiment of the present invention provides, connects the by the first port of the first switching network
One power supply, the second port of second switch network connects second source, and wherein the voltage of the first power supply is less than the electricity of second source
Pressure, the first side of transformator passes through inductance connection the first switching network, and the second side of transformator is by electric capacity and inductance connection the
Two switching networks, the second side that electric capacity is arranged at transformator can reduce the requirement of scope pressure to electric capacity, reduces parallel connection
Electric capacity number, thus save the cost of bi-directional DC-DC converter；Simple for structure, it is simple to detect and safeguard.
2. what the embodiment of the present invention provided controls the method that electric energy is changed to second source from the first power supply, by controlling
SD1 and SD4 switching tube Guan Bi, simultaneously SD8 switching tube Guan Bi, then by control SD1 and SD4 switching tube close, with
Time SD8 switching tube disconnect；Control the switching tube Guan Bi of the switching tube Guan Bi of SD2 and SD3, simultaneously SD7 again, then control SD2
Closing with the switching tube of SD3, the switching tube of SD7 disconnects simultaneously, makes electric energy first shift to inductance from the first power supply, then inductance institute
The electric energy stored is changed to second source again, and electric energy is also directly changed to second source from the first power supply in addition, takes full advantage of
The characteristic of inductive energy storage, while holding circuit connects succinctly, it is achieved electric energy is changed to second source from the first power supply.
3. what the embodiment of the present invention provided controls electric energy from second source to the method for the first Power convert, by controlling
The switching tube Guan Bi of the switching tube Guan Bi of SD6 and SD7, simultaneously SD2 and SD3, then controls the switching tube Guan Bi of SD6, the opening of SD7
Close the switching tube Guan Bi of pipe disconnection, simultaneously SD2 and SD3；Control opening of the switching tube Guan Bi of SD5 and SD8, simultaneously SD1 and SD4 again
Pass pipe Guan Bi, then controls the switching tube Guan Bi of the switching tube Guan Bi of SD5, the switching tube disconnection of SD8, simultaneously SD1 and SD4, makes
Electric energy first shifts to inductance from second source, and then the electric energy stored by inductance is again to the first Power convert, in addition electric energy also from
Second source directly to the first Power convert, takes full advantage of the characteristic of inductive energy storage, while holding circuit connects succinctly,
Realize electric energy from second source to the first Power convert.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Figure 1A is the theory diagram of bi-directional DC-DC converter in the embodiment of the present invention 1；
Figure 1B is the theory diagram of a concrete example of bi-directional DC-DC converter in the embodiment of the present invention 1；
Fig. 2 A to 2D is to control the method step pair that electric energy is changed to second source from the first power supply in the embodiment of the present invention 2
The circuit loop schematic diagram answered；
Fig. 2 E is the control signal corresponding time relationship schematic diagram of the embodiment of the present invention 2 breaker in middle pipe S1-S7；
Fig. 3 A to 3D is to control electric energy in the embodiment of the present invention 3 from second source to the method step pair of the first Power convert
The circuit loop schematic diagram answered；
Fig. 3 E is the control signal corresponding time relationship schematic diagram of the embodiment of the present invention 3 breaker in middle pipe S1-S7.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " first ", " second ", " the 3rd " are only used for describing purpose,
And it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, it is also possible to
It is the connection of two element internals, can be wireless connections, it is also possible to be wired connection.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
If additionally, the most non-structure of technical characteristic involved in invention described below difference embodiment
Become conflict just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of bi-directional DC-DC converter, as shown in Figure 1A, including the first switching network and second switch
Network, the first port of the first switching network connects the first power supply, and the second port of second switch network connects second source.Its
In, the voltage of the first power supply is less than the voltage of second source, it is generally the case that the first power supply is battery, and second source is exchange
Bus is converted to the voltage after direct current.
This bi-directional DC-DC converter also includes: transformator, for mutually being passed by the energy of its first side and the second side
Pass.Inductance connection the first switching network is passed through in first side of transformator, and the second side of transformator is by electric capacity and inductance connection the
Second side of two switching networks, i.e. transformator constitutes LC series circuit.Voltage due to the first power supply is less than the electricity of second source
Pressure, when electric energy is changed, the power of transformator both sides is equal, and therefore the electric current of transformator the first side is more than the electric current of the second side,
Electric capacity is arranged at the second side of transformator, i.e. connects the side of second source, the requirement of scope pressure to electric capacity can be reduced,
Reduce electric capacity number in parallel, thus save the cost of bi-directional DC-DC converter.
Above-mentioned bi-directional DC-DC converter, connects the first power supply, second switch net by the first port of the first switching network
Second port of network connects second source, and wherein the voltage of the first power supply is less than the voltage of second source, the first side of transformator
By inductance connection the first switching network, electric capacity and inductance connection second switch network are passed through in the second side of transformator, by electric capacity
The second side being arranged at transformator can reduce the requirement of scope pressure to electric capacity, reduces electric capacity number in parallel, thus saves
The cost of bi-directional DC-DC converter；Simple for structure, it is simple to detect and safeguard.
As a kind of preferred implementation of the present embodiment, as shown in Figure 1B, the first switching network includes switch module
SD1, SD2, SD3, SD4, second switch network includes switch module SD5, SD6, SD7, SD8.Switch module include switching tube and
Diode, it is preferable that switching tube includes audion or metal-oxide-semiconductor.Switching tube is in parallel with diode reverse, when the first of switch module
When the voltage of connection end connects the voltage of end more than second, switching tube just can turn on, now diode reverse cut-off；Work as switches set
When the voltage of the second connection end of part connects the voltage of end more than first, diode just can turn on, and now switching tube is not turned on.
Such as, when switching tube is NPN type triode, the colelctor electrode C of audion connects the negative electrode of diode, and this is connected
Contact one end is as the first connection end of switch module；The emitter E of audion connects the anode of diode, and by this junction point
One end is as the second connection end of switch module；Base stage B of audion, as the 3rd connection end of switch module, is used for connecting control
Device processed.When switching tube is P-channel metal-oxide-semiconductor, the drain D of metal-oxide-semiconductor connects the negative electrode of diode, and using this junction point one end as
First connection end of switch module；The source S of metal-oxide-semiconductor connects the anode of diode, and using this junction point one end as switches set
Second connection end of part；The grid G of MOS, as the 3rd connection end of switch module, is used for connecting controller.
The annexation of the first switching network breaker in middle assembly is as follows: SD1 with SD3 connects, SD2 with SD4 connects, SD1's
Second connects end is connected end connection with the first of SD3, and the second connection end of SD2 is connected end and connects with the first of SD4；The of SD1
One connects end is connected end connection with the first of SD2, and connects the positive pole of the first power supply；The second connection end of SD3 and the second of SD4
Connect end to connect, and connect the negative pole of the first power supply.
The annexation of second switch network breaker in middle assembly is as follows: SD5 with SD7 connects, SD6 with SD8 connects, SD5's
Second connects end is connected end connection with the first of SD7, and the second connection end of SD6 is connected end and connects with the second of SD8；The of SD5
One connects end is connected end connection with the first of SD6, and connects the positive pole of second source；The second connection end of SD7 and the second of SD8
Connect end to connect, and connect the negative pole of second source.
The annexation of transformator and the first switching network, second switch network is as follows: the first of the first side of transformator
Connecting the second connection end that end connects SD1 by inductance Lr1, the second connection end of the first side of transformator connects the second of SD2
Connect end；First connection end of the second side of transformator connects the second connection end of SD5, the second of transformator by inductance Lr2
Second connection end of side connects the second connection end of SD6 by electric capacity Cr.First connection end and transformation of the first side of transformator
First connection end of the second side of device is Same Name of Ends.
As a kind of deformation of above-mentioned connected mode, inductance Lr1 can also be connected on the second company of the first side of transformator
Connect end to be connected between end with the second of SD2；Inductance Lr2 can also be connected on the second connection end and SD6 of the second side of transformator
Second connection end between；Electric capacity Cr can also be connected on the first connection end of the second side of transformator and be connected with the second of SD5
Between end.
Additionally, the first side of transformator is also parallel with inductance Lm.Above-mentioned inductance Lm, Lr1, Lr2 can be transformator self
Equivalent inductance, it is also possible to for the extra inducer connected.
It addition, the first both ends of power is also parallel with electric capacity C1, second source two ends are parallel with electric capacity C2.
As a kind of preferred implementation of the present embodiment, in order to switch module SD1, SD2, SD3, SD4, SD5, SD6,
SD7, SD8 are controlled, and this bi-directional DC-DC converter also includes controller, respectively connecting valve assembly SD1, SD2, SD3,
The 3rd connection end of SD4, SD5, SD6, SD7, SD8, the 3rd connection end is as controlling input, for according to electric energy conversion side
Height to the voltage signal inputted by control controls switch module D1, SD2, SD3, SD4, SD5, SD6, SD7, SD8's
Switching tube Guan Bi or disconnection.
Embodiment 2
The present embodiment provides a kind of and controls the method that electric energy is changed to second source from the first power supply, for embodiment 1 institute
In the controller of the bi-directional DC-DC converter stated, the method includes:
S10: control the switching tube Guan Bi of SD1 and SD4, simultaneously the switching tube Guan Bi of SD8.
When the switching tube S4 Guan Bi of switching tube S1 and SD4 of SD1, and when the switching tube S8 of SD8 closes, current loop is such as
Shown in Fig. 2 A, now inductance Lr1 and Lr2 is in energy storage state, and electric energy shifts to Lr1 and Lr2 from the first power supply DC1.
S20: controlling the switching tube Guan Bi of SD1 and SD4, the switching tube of SD8 disconnects simultaneously.
When the switching tube S4 Guan Bi of switching tube S1 and SD4 of SD1, and when the switching tube S8 of SD8 disconnects, current loop is such as
Shown in Fig. 2 B, now electric energy from the first power supply DC1 to second source DC2 change, simultaneously the electric energy stored by Lr1 and Lr2 also to
Second source DC2 changes.
S30: control the switching tube Guan Bi of SD2 and SD3, simultaneously the switching tube Guan Bi of SD7.
When the switching tube S3 Guan Bi of switching tube S2 and SD3 of SD2, and when the switching tube S7 of SD7 closes, current loop is such as
Shown in Fig. 2 C, now inductance Lr1 and Lr2 is in energy storage state, and electric energy shifts to Lr1 and Lr2 from the first power supply DC1.
S40: controlling the switching tube Guan Bi of SD2 and SD3, the switching tube of SD7 disconnects simultaneously.
When the switching tube S3 Guan Bi of switching tube S2 and SD3 of SD2, and when the switching tube S7 of SD7 disconnects, current loop is such as
Shown in Fig. 2 D, now electric energy from the first power supply DC1 to second source DC2 change, simultaneously the voltage stored by Lr1 and Lr2 also to
Second source DC2 changes.
The method that above-mentioned control electric energy is changed to second source from the first power supply, closes by controlling the switching tube of SD1 and SD4
The switching tube Guan Bi of conjunction, simultaneously SD8, then by controlling the switching tube disconnection of the switching tube Guan Bi of SD1 and SD4, simultaneously SD8；
Control the switching tube Guan Bi of the switching tube Guan Bi of SD2 and SD3, simultaneously SD7 again, then control the switching tube Guan Bi of SD2 and SD3,
The switching tube of SD7 disconnects simultaneously, makes electric energy first shift to inductance from the first power supply, and then the electric energy stored by inductance is again to second
Power convert, electric energy is also directly changed to second source from the first power supply in addition, takes full advantage of the characteristic of inductive energy storage, is protecting
While holding circuit connection succinctly, it is achieved electric energy is changed to second source from the first power supply.
Preferably, the control signal corresponding time relationship of switching tube S1-S7 as shown in Figure 2 E, SD1, SD2, SD3, SD4's
The control signal of switching tube is the square wave of fixed duty cycle, and the control signal dutycycle of the switching tube of SD7 and SD8 is adjustable, passes through
Adjust dutycycle and can adjust the voltage of the second source end that this bi-directional DC-DC converter is exported, thus obtain relative broad range
Interior voltage, adapts to the situation that second source end busbar voltage fluctuation is bigger.
Further, the control signal of SD1 with SD4 is identical；The control signal of the switching tube of SD2 with SD3 is identical, and with
The control signal of SD1 and SD4 is complementary, i.e. any instant, the switching tube Guan Bi of SD2 and SD3, or the switching tube of SD1 and SD4 closes
Close.
As a kind of preferred implementation of the present embodiment, the control signal frequency of the switching tube of SD1, SD2, SD3, SD4
ForThis frequency is the LC series resonance frequency of transformator the second side, thus constitutes series resonant circuit, makes
Obtain energy conversion efficiency the highest, fastest；Additionally, under series resonance situation, the electric current of circuit is close to sinusoidal wave, in electric current mistake
Open and close switching tube during zero point, it is achieved Sofe Switch works, it is possible to reduce switching loss, extends and switchs service life.
Embodiment 3
The present embodiment provides a kind of and controls electric energy from second source to the method for the first Power convert, for embodiment 1 institute
In the controller of the bi-directional DC-DC converter stated, the method includes:
S50: control the switching tube Guan Bi of SD6 and SD7, simultaneously the switching tube Guan Bi of SD2 and SD3.
When the switching tube S7 Guan Bi of switching tube S6 and SD7 of SD6, and the switching tube S3 of switching tube S2 and SD3 of SD2 closes
During conjunction, current loop as shown in Figure 3A, now, change to the first power supply DC1 from second source DC2 by electric energy；Simultaneously inductance Lr1 and
Lr2 is in energy storage state, and electric energy also shifts to Lr1 and Lr2.
S60: control the switching tube Guan Bi of SD6, the switching tube of SD7 disconnects, simultaneously the switching tube Guan Bi of SD2 and SD3.
When switching tube S6 Guan Bi, the switching tube S7 of SD7 of SD6 disconnect, and the switching tube of switching tube S2 and SD3 of SD2
During S3 Guan Bi, current loop as shown in Figure 3 B, change to the first power supply DC1 by the electric energy stored by Lr1 and Lr2.
S70: control the switching tube Guan Bi of SD5 and SD8, simultaneously the switching tube Guan Bi of SD1 and SD4.
When the switching tube S8 Guan Bi of switching tube S5 and SD8 of SD5, and the switching tube S4 of switching tube S1 and SD4 of SD1 closes
During conjunction, current loop as shown in Figure 3 C, now, change to the first power supply DC1 from second source DC2 by electric energy；Meanwhile, inductance Lr1
Being in energy storage state with Lr2, electric energy also shifts to Lr1 and Lr2.
S80: control the switching tube Guan Bi of SD5, the switching tube of SD8 disconnects, simultaneously the switching tube Guan Bi of SD1 and SD4.
When switching tube S5 Guan Bi, the switching tube S8 of SD8 of SD5 disconnect, and the switching tube of switching tube S1 and SD4 of SD1
During S4 Guan Bi, current loop as shown in Figure 3 D, change to the first power supply DC1 by the electric energy stored by Lr1 and Lr2.
Above-mentioned control electric energy, closes to the method for the first Power convert by controlling the switching tube of SD6 and SD7 from second source
Close, simultaneously SD2 and SD3 switching tube Guan Bi, then control SD6 switching tube Guan Bi, SD7 switching tube disconnect, simultaneously SD2 and
The switching tube Guan Bi of SD3；Control the switching tube Guan Bi of the switching tube Guan Bi of SD5 and SD8, simultaneously SD1 and SD4 again, then control
The switching tube Guan Bi of SD5, the switching tube of SD8 disconnect, the switching tube Guan Bi of SD1 and SD4 simultaneously, make electric energy first from second source to
Inductance shift, then the electric energy stored by inductance is again to the first Power convert, in addition electric energy also from second source directly to first
Power convert, takes full advantage of the characteristic of inductive energy storage, while holding circuit connects succinctly, it is achieved electric energy is from second source
To the first Power convert.
Preferably, the control signal corresponding time relationship of switching tube S1-S7 as shown in FIGURE 3 E, the switching tube of SD5 and SD6
Control signal is the square wave of fixed duty cycle, and the control signal dutycycle of the switching tube of SD7 and SD8 is adjustable, can be by the second electricity
Voltage in source relative broad range is converted into the voltage range of the first power supply, bigger to adapt to second source end busbar voltage fluctuation
Situation.
Further, the control signal of SD1 with SD4 is identical；The control signal of the switching tube of SD2 with SD3 is identical, and with
The control signal of SD1 and SD4 is complementary, i.e. any instant, the switching tube Guan Bi of SD2 and SD3, or the switching tube of SD1 and SD4 closes
Close.
As a kind of preferred implementation of the present embodiment, the control signal frequency of the switching tube of SD1, SD2, SD3, SD4
ForThis frequency is the LC series resonance frequency of transformator the second side, thus constitutes series resonant circuit so that
Energy conversion efficiency is the highest, fastest；Additionally, under series resonance situation, the electric current of circuit is close to sinusoidal wave, at current over-zero
Open and close switching tube during point, it is achieved Sofe Switch works, it is possible to reduce switching loss, extends and switchs service life.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (11)
1. a bi-directional DC-DC converter, including the first switching network and second switch network, the of described first switching network
Single port connects the first power supply, and the second port of described second switch network connects second source；It is characterised by, described first electricity
The voltage in source is less than the voltage of described second source, and described bi-directional DC-DC converter also includes:
Transformator, for mutually transmitting the energy of its first side and the second side；First side of described transformator is by electricity
Sense connects described first switching network, and the second side of described transformator is by second switch network described in electric capacity and inductance connection.
Bi-directional DC-DC converter the most according to claim 1, it is characterised in that described first switching network includes switch
Assembly SD1, SD2, SD3, SD4；Described SD1 connects with described SD3, and described SD2 connects with described SD4, and the second of described SD1 is even
Connecing end and be connected end connection with the first of described SD3, the second connection end of described SD2 is connected end and connects with the first of described SD4；Institute
The the first connection end stating SD1 is connected end connection with the first of described SD2, and connects the positive pole of described first power supply；Described SD3's
Second connects end is connected end connection with the second of described SD4, and connects the negative pole of described first power supply；
Described second switch network includes switch module SD5, SD6, SD7, SD8；Described SD5 connects with described SD7, described SD6
Connecting with described SD8, the second connection end of described SD5 is connected end and connects with the first of described SD7, second connection of described SD6
End is connected end and connects with the second of described SD8；The first connection end of described SD5 is connected end and connects with the first of described SD6, and even
Connect the positive pole of described second source；The second connection end of described SD7 is connected end and connects with the second of described SD8, and connects described
The negative pole of second source；
First connection end of the first side of described transformator connects the second connection end of described SD1, described transformation by inductance Lr1
Second connection end of the first side of device connects the second connection end of described SD2；First connection end of the second side of described transformator
Connected the second connection end of described SD5 by inductance Lr2, the second connection end of the second side of described transformator is by electric capacity Cr even
Connect the second connection end of described SD6；The of second side of the first connection end and described transformator of the first side of described transformator
One connection end is Same Name of Ends.
Bi-directional DC-DC converter the most according to claim 2, it is characterised in that described switch module include switching tube and
Diode, described switching tube is in parallel with described diode reverse.
Bi-directional DC-DC converter the most according to claim 3, it is characterised in that described switching tube includes audion or MOS
Pipe.
5. according to the arbitrary described bi-directional DC-DC converter of claim 2 to 4, it is characterised in that also include:
Controller, connects the 3rd connection end of described switch module SD1, SD2, SD3, SD4, SD5, SD6, SD7, SD8 respectively, uses
In the switching tube Guan Bi controlling described switch module SD1, SD2, SD3, SD4, SD5, SD6, SD7, SD8 according to electric energy conversion direction
Or disconnect.
6. control the method that electric energy is changed to described second source from described first power supply, for described in claim 5
In the controller of bi-directional DC-DC converter, it is characterised in that described method includes:
Control the switching tube Guan Bi of described SD1 and described SD4, the switching tube Guan Bi of the most described SD8；
Controlling the switching tube Guan Bi of described SD1 and described SD4, the switching tube of the most described SD8 disconnects；
Control the switching tube Guan Bi of described SD2 and described SD3, the switching tube Guan Bi of the most described SD7；
Controlling the switching tube Guan Bi of described SD2 and described SD3, the switching tube of the most described SD7 disconnects.
Method the most according to claim 6, it is characterised in that the control letter of the switching tube of described SD1, SD2, SD3, SD4
Number being the square wave of fixed duty cycle, the control signal dutycycle of the switching tube of described SD7 and described SD8 is adjustable.
8. control electric energy from described second source to a method for described first Power convert, for described in claim 5
In the controller of bi-directional DC-DC converter, it is characterised in that described method includes:
Control the switching tube Guan Bi of described SD6 and described SD7, the switching tube Guan Bi of the most described SD2 and described SD3；
Control the switching tube Guan Bi of described SD6, the switching tube of described SD7 disconnects, the most described SD2 and the switching tube of described SD3
Guan Bi；
Control the switching tube Guan Bi of described SD5 and described SD8, the switching tube Guan Bi of the most described SD1 and described SD4；
Control the switching tube Guan Bi of described SD5, the switching tube of described SD8 disconnects, the most described SD1 and the switching tube of described SD4
Guan Bi.
Method the most according to claim 8, it is characterised in that the control signal of the switching tube of described SD5 and SD6 accounts for for fixing
The square wave of empty ratio, the control signal dutycycle of the switching tube of described SD7 and SD8 is adjustable.
10. according to the method described in claim 6 or 8, it is characterised in that described SD1 is identical with the control signal of described SD4；
Described SD2 is identical with the control signal of the switching tube of described SD3, and complementary with the control signal of described SD1 and described SD4.
11. according to the method described in claim 6 or 8, it is characterised in that the control of the switching tube of described SD1, SD2, SD3, SD4
Signal frequency processed is
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877677A (en) * | 2017-04-10 | 2017-06-20 | 深圳市永联科技股份有限公司 | A kind of converter control circuit being self-regulated with bi-directional synchronization rectification and dead band |
| CN113424426A (en) * | 2020-10-14 | 2021-09-21 | 深圳欣锐科技股份有限公司 | Bidirectional resonance circuit and automobile |
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| CN103715907A (en) * | 2012-10-09 | 2014-04-09 | 旭隼科技股份有限公司 | Bidirectional DC/DC converter |
| CN204615654U (en) * | 2015-05-12 | 2015-09-02 | 江苏固德威电源科技有限公司 | Resonant circuit and adopt its bidirectional energy-storage inverter |
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| EP2685620A1 (en) * | 2011-03-07 | 2014-01-15 | Shindengen Electric Manufacturing Co., Ltd. | Bidirectional dc-dc converter, and power source system |
| CN103715907A (en) * | 2012-10-09 | 2014-04-09 | 旭隼科技股份有限公司 | Bidirectional DC/DC converter |
| CN204615654U (en) * | 2015-05-12 | 2015-09-02 | 江苏固德威电源科技有限公司 | Resonant circuit and adopt its bidirectional energy-storage inverter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106877677A (en) * | 2017-04-10 | 2017-06-20 | 深圳市永联科技股份有限公司 | A kind of converter control circuit being self-regulated with bi-directional synchronization rectification and dead band |
| CN106877677B (en) * | 2017-04-10 | 2020-07-03 | 深圳市永联科技股份有限公司 | Converter control circuit with bidirectional synchronous rectification and dead-zone self-regulation |
| CN113424426A (en) * | 2020-10-14 | 2021-09-21 | 深圳欣锐科技股份有限公司 | Bidirectional resonance circuit and automobile |
| WO2022077262A1 (en) * | 2020-10-14 | 2022-04-21 | 深圳欣锐科技股份有限公司 | Bidirectional resonant circuit and automobile |
| CN113424426B (en) * | 2020-10-14 | 2023-02-10 | 深圳欣锐科技股份有限公司 | Bidirectional resonant circuit and automobile |
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|---|---|
| CN106208710B (en) | 2019-01-25 |
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Address after: 215000 No. 90, Zijin Road, high tech Zone, Suzhou, Jiangsu Patentee after: Goodway Technology Co.,Ltd. Address before: 215163 No.189 Kunlunshan Road, high tech Zone, Suzhou City, Jiangsu Province Patentee before: JIANGSU GOODWE POWER SUPPLY TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A Control Method of Bidirectional DC-DC Converter Effective date of registration: 20230113 Granted publication date: 20190125 Pledgee: Bank of Suzhou Co.,Ltd. Shishan road sub branch Pledgor: Goodway Technology Co.,Ltd. Registration number: Y2023320010044 |
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Denomination of invention: A Control Method for Bidirectional DC-DC Converter Granted publication date: 20190125 Pledgee: Bank of Suzhou Co.,Ltd. Shishan road sub branch Pledgor: Goodway Technology Co.,Ltd. Registration number: Y2024980024728 |