CN107659155A - Two-way DC converter and bidirectional, dc conversion control method - Google Patents
Two-way DC converter and bidirectional, dc conversion control method Download PDFInfo
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- CN107659155A CN107659155A CN201710680689.0A CN201710680689A CN107659155A CN 107659155 A CN107659155 A CN 107659155A CN 201710680689 A CN201710680689 A CN 201710680689A CN 107659155 A CN107659155 A CN 107659155A
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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
- H02M3/33569—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 several active switching elements
- H02M3/33576—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 several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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- Dc-Dc Converters (AREA)
Abstract
The invention provides a kind of two-way DC converter and bidirectional, dc conversion control method, the two-way DC converter includes the first copped wave unit, the second copped wave unit, transformer, voltage detection unit and control unit, and the second copped wave unit is connected to positive bus-bar and negative busbar；There is the first electric capacity between the positive bus-bar and negative busbar, the second inductance and the second electric capacity are connected in series between the centre tap of the vice-side winding of the transformer and the negative busbar, and the both ends of second electric capacity are connected to the second external terminal；Described control unit is when energy flows to the second external terminal by the first external terminal, the dutycycle of the pulse width modulating signal of the control terminal of the first copped wave unit is output to according to the second external terminal voltage adjustment, until the voltage that the voltage detection unit measures reaches preset value.The present invention can make two-way DC converter ensure the high-efficiency transfer of energy when possessing larger transfer ratio excursion.
Description
Technical field
The present invention relates to DC converter field, more specifically to a kind of two-way DC converter and bidirectional, dc
Conversion control method.
Background technology
With the continuous development of electric automobile and automation industry, more and more application scenarios require to realize that bidirectional energy passes
It is defeated.Bidirectional energy transmission can be realized by two unidirectional power inverters, but this mode not only power density it is low but also
Reliability is low, therefore bidirectional power converter arises at the historic moment.
Compared to traditional unidirectional power converter, although bidirectional power converter improves power density, but its efficiency
It can but decline etc. characteristic.Based on this, high efficiency is realized, the bidirectional power converter of high power density is current power supply industry
One of emphasis studied.
As shown in figure 1, be the circuit topology figure of existing buck/boost (Buck/Boost) converter, the buck/boost
Converter is in decompression using decompression (Buck) topology, i.e. switching tube Q2 is held off, by PWM (plus width
Modulation, pulsewidth modulation) ripple driving switching tube Q1, inductance L1, electric capacity C2 by voltage V1 decompression for voltage V2 export；
It is held on during boosting using boosting (Boost) topology, i.e. switching tube Q1, switching tube Q2, inductance L1, the electricity driven by PWM ripples
Hold C2 to export voltage V2 boostings for voltage V1.Although the buck/boost converter can realize two-way energy transmission,
This converter belongs to non-isolated converter, and it can only unidirectionally realize one kind in boosting or decompression, can not be unidirectional
On not only realize decompression and realize boost, application scenario is more limited to.
As shown in Fig. 2 it is the circuit topology figure of existing two-stage bidirectional converter.The wherein one-level of two-stage bidirectional converter is
Buck/boost (Buck/Boost) non-isolated structure (including inductance L1, switching tube Q1, Q2, electric capacity C3), one-level is isolation in addition
Structure (including isolated converter).The buck/boost of two-stage bidirectional converter is generally real by the non-isolated structural levels of Buck/Boost
It is existing.But the reversible transducer is due to using two-layer configuration, therefore its volume is larger, is unfavorable for the lifting of power density.
As shown in figure 3, it is the circuit topology figure of the two-stage bidirectional converter of existing double active structures.The reversible transducer
Both ends are chopper circuit (by switching tube Q1~Q4 chopper circuits formed and the copped wave electricity being made up of switching tube Q5~Q8
Road), and the DC source on two electric capacity C1, C2 is converted on inductance L1 by alternating voltage source by chopper circuit, so as to shape
Transmitted into energy.But reversible transducer efficiency when voltage transfer ratio excursion is larger declines serious.
As shown in figure 4, it is the circuit topology figure of the reversible transducer of existing bilateral two-way resonance structure.The two-way changing
The both ends of device are chopper circuit (by switching tube Q1~Q4 chopper circuits formed and the copped wave electricity being made up of switching tube Q5~Q8
Road), and the reversible transducer includes the resonator (resonance being made up of inductance L1, L3, electric capacity C3 positioned at transformer T both sides
Chamber and the resonator being made up of inductance L2, L4, electric capacity C4), it all connects humorous when forward and reverse works for typical LLC
Shake structure, it is possible to achieve the Sofe Switch of gamut.But the reversible transducer is equally when voltage transfer ratio excursion is larger
Efficiency is waited to decline seriously.
The content of the invention
The technical problem to be solved in the present invention is, larger in voltage transfer ratio excursion for above-mentioned reversible transducer
When efficiency decline it is serious the problem of, there is provided a kind of new two-way DC converter and bidirectional, dc conversion control method.
The technical scheme that the present invention solves above-mentioned technical problem is to provide a kind of two-way DC converter, including first cuts
Ripple unit, the second copped wave unit, transformer and control unit, it is external that the first side of the first copped wave unit is connected to first
Terminal, the second side via the first inductance connection to the transformer the first side winding；First side of the second copped wave unit
It is connected to the second side winding of the transformer, the second side is connected to positive bus-bar and negative busbar；The positive bus-bar and negative busbar it
Between there is the first electric capacity, be connected in series between the centre tap of the vice-side winding of the transformer and the negative busbar second electricity
Sense and the second electric capacity, and the both ends of second electric capacity are connected to the second external terminal；The two-way DC converter also includes
For detecting the voltage detection unit of the second external terminal voltage；Described control unit is connected to the first copped wave unit and
The control terminal of two copped wave units, and described control unit is when energy flows to the second external terminal by the first external terminal, according to
The voltage adjustment that the voltage detection unit measures is output to the pulse width modulating signal of the control terminal of the first copped wave unit
Dutycycle, until the voltage that the voltage detection unit measures reaches preset value.
In two-way DC converter of the present invention, the first copped wave unit is opened including first switch pipe, second
Guan Guan, the 3rd switching tube and the 4th switching tube, and the first switch pipe, that second switch pipe is connected in series in described first is external
Between the negative pole and positive pole of terminal, the 3rd switching tube and the 4th switching tube be connected in series in the negative of first external terminal
Between pole and positive pole；The tie point of the first switch pipe and the second switch pipe is via first inductance connection described in
The tie point of the head end of the primary side winding of transformer, the 3rd switching tube and the 4th switching tube is connected to the transformer
Primary side winding tail end；
The second copped wave unit includes the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube, and institute
State the 5th switching tube, the 6th switching tube is connected in series between negative busbar and positive bus-bar, the 7th switching tube and the 8th switchs
Pipe is connected in series between negative busbar and positive bus-bar；5th switching tube, the tie point of the 6th switching tube are connected to the change
The tie point of the head end of the vice-side winding of depressor, the 7th switching tube and the 8th switching tube is connected to the secondary of the transformer
The tail end of winding；
When energy flows to the second external terminal by the first external terminal, described control unit is to the first switch pipe
Control terminal exports the first modulated signal, to the control terminal of the second switch pipe and the control terminal output the of the 6th switching tube
Two modulated signals, the 3rd modulated signal of control terminal output, the control terminal to the 4th switching tube to the 3rd switching tube
The 4th modulated signal is exported with the control terminal of the 8th switching tube, the modulation of control terminal output the 5th to the 5th switching tube is believed
Number, to the control terminal of the 7th switching tube export the 6th modulated signal, and the voltage measured according to the voltage detection unit
The dutycycle of first modulated signal is progressively adjusted, until the voltage that the voltage detection unit measures reaches preset value；Institute
It is identical to state the dutycycle of the first modulated signal, the second modulated signal, the 3rd modulated signal and the 4th modulated signal, and described
The phase difference of one modulated signal and the second modulated signal has same phase for 180 degree, with the 4th modulated signal；Described
Two modulated signals have same phase with the 3rd modulated signal；5th modulated signal is complementary with the second modulated signal, described
6th modulated signal is complementary with the first modulated signal.
In two-way DC converter of the present invention, the dutycycle of first modulated signal is less than 0.5.
In two-way DC converter of the present invention, electricity that described control unit measures in the voltage detection unit
Pressure reduces the dutycycle of first modulated signal when being more than preset value, the voltage measured in the voltage detection unit is less than in advance
If the dutycycle of first modulated signal is increased during value.
In two-way DC converter of the present invention, the two-way DC converter includes being used to detect the second inductance
The current detecting unit of current value；
The first copped wave unit includes first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, and institute
State first switch pipe, second switch pipe is connected in series between the negative pole and positive pole of first external terminal, the described 3rd opens
Close pipe and the 4th switching tube is connected in series between the negative pole and positive pole of first external terminal；The first switch pipe and institute
The tie point of second switch pipe is stated via the head end of primary side winding of first inductance connection to the transformer, the described 3rd
The tie point of switching tube and the 4th switching tube is connected to the tail end of the primary side winding of the transformer；
The second copped wave unit includes the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube, and institute
State the 5th switching tube, the 6th switching tube is connected in series between negative busbar and positive bus-bar, the 7th switching tube and the 8th switchs
Pipe is connected in series between negative busbar and positive bus-bar；5th switching tube, the tie point of the 6th switching tube are connected to the change
The tie point of the head end of the vice-side winding of depressor, the 7th switching tube and the 8th switching tube is connected to the secondary of the transformer
The tail end of winding；
The second external terminal is flowed to by the first external terminal in energy, and the electric current that the current detecting unit measures is more than
Or during equal to zero, described control unit exports the first modulated signal to the control terminal of the first switch pipe, opened to described second
Close the control terminal of pipe and the control terminal of the 6th switching tube exports the second modulated signal, the control terminal to the 3rd switching tube
Export the 3rd modulated signal, believe to the control terminal of the 4th switching tube and the modulation of control terminal output the 4th of the 8th switching tube
Number, to the 5th switching tube control terminal export the 5th modulated signal, to the 7th switching tube control terminal export the 6th
Modulated signal, and the voltage measured according to the voltage detection unit progressively adjusts the dutycycle of first modulated signal, directly
The voltage measured to the voltage detection unit reaches the electric current that preset value or the current detecting unit measure and is less than zero；It is described
First modulated signal, the second modulated signal, the dutycycle of the 3rd modulated signal and the 4th modulated signal are identical, and described first
The phase difference of modulated signal and the second modulated signal has same phase for 180 degree, with the 4th modulated signal；Described second
Modulated signal and the 3rd modulated signal have same phase, and the 5th modulated signal is complementary with the second modulated signal, and described the
Six modulated signals are complementary with the first modulated signal；
The second external terminal is flowed to by the first external terminal in energy, and the electric current that the current detecting unit measures is less than
When zero, described control unit is adjusted to the first switch pipe, the 4th switching tube, the 5th switching tube and the 8th switching tube output the 7th
Signal processed, to the second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube the 8th modulated signal is exported, and
The voltage measured according to the voltage detection unit progressively adjusts the dutycycle of the 7th modulated signal, until the voltage is examined
Survey the voltage that unit measures and reach preset value；7th modulated signal is identical with the dutycycle of the 8th modulated signal and described
The phase difference of 7th modulated signal and the 8th modulated signal is 180 degree.
In two-way DC converter of the present invention, the dutycycle of first modulated signal and the 7th modulated signal
Less than 0.5.
In two-way DC converter of the present invention, electricity that described control unit measures in the voltage detection unit
Pressure reduces the dutycycle of first modulated signal and the 7th modulated signal, surveyed in the voltage detection unit when being more than preset value
The voltage obtained increases the dutycycle of first modulated signal and the 7th modulated signal when being less than preset value.
The present invention also provides a kind of bidirectional, dc conversion control method, and it is external by the first external terminal to flow to second in energy
Include during terminal：
Detect the second external terminal voltage；
The pulse width modulation of the control terminal of the first copped wave unit is output to according to the second external terminal voltage adjustment
The dutycycle of signal, until the second external terminal voltage reaches preset value；Wherein, the first side of the first copped wave unit
It is connected to the primary side winding of the first external terminal, opposite side via the first inductance connection to the transformer；
Make the second copped wave unit by the change to the control terminal output pulse width modulated signal of the second copped wave unit
The output of the vice-side winding of depressor is rectified into DC voltage；Wherein, the first side of the second copped wave unit is connected to transformer
Vice-side winding, the second side be connected to positive bus-bar and negative busbar；There is the first electric capacity between the positive bus-bar and negative busbar, it is described
There is the second inductance and the second electric capacity being connected in series between the centre tap and negative busbar of the vice-side winding of transformer, and it is described
The both ends of second electric capacity are connected to the second external terminal.
In bidirectional, dc conversion control method of the present invention, the first copped wave unit include first switch pipe,
Second switch pipe, the 3rd switching tube and the 4th switching tube, and the first switch pipe, second switch pipe are connected in series in described
Between the negative pole and positive pole of one external terminal, the 3rd switching tube and the 4th switching tube be connected in series in first external connection end
Between the negative pole and positive pole of son；The tie point of the first switch pipe and the second switch pipe is via first inductance connection
The tie point of head end, the 3rd switching tube and the 4th switching tube to the primary side winding of the transformer is connected to described
The tail end of the primary side winding of transformer；The second copped wave unit include the 5th switching tube, the 6th switching tube, the 7th switching tube and
8th switching tube, and the 5th switching tube, the 6th switching tube is connected in series between negative busbar and positive bus-bar, the described 7th opens
Close pipe and the 8th switching tube is connected in series between negative busbar and positive bus-bar；The connection of 5th switching tube, the 6th switching tube
The tie point that point is connected to the head end of vice-side winding of the transformer, the 7th switching tube and the 8th switching tube is connected to institute
State the tail end of the vice-side winding of transformer；
The pulse width of the control terminal that the first copped wave unit is output to according to the second external terminal voltage adjustment
The dutycycle of modulated signal includes：The first modulated signal is exported to the control terminal of the first switch pipe, to the second switch
The control terminal of pipe and the control terminal of the 6th switching tube export the second modulated signal, to the 3rd switching tube control terminal it is defeated
Go out the 3rd modulated signal, the 4th modulated signal is exported to the control terminal of the 4th switching tube and the control terminal of the 8th switching tube,
The 5th modulated signal, the modulation of control terminal output the 6th to the 7th switching tube are exported to the control terminal of the 5th switching tube
Signal, and the dutycycle of first modulated signal is progressively adjusted according to the second external terminal voltage, until described second
External terminal voltage reaches preset value；First modulated signal, the second modulated signal, the 3rd modulated signal and the 4th modulation
The dutycycle of signal is identical, and the phase difference of first modulated signal and the second modulated signal is adjusted for 180 degree, with the described 4th
Signal processed has same phase；Second modulated signal has same phase with the 3rd modulated signal；The 5th modulation letter
Number complementary with the second modulated signal, the 6th modulated signal is complementary with the first modulated signal.
In bidirectional, dc conversion control method of the present invention, the first copped wave unit include first switch pipe,
Second switch pipe, the 3rd switching tube and the 4th switching tube, and the first switch pipe, second switch pipe are connected in series in described
Between the negative pole and positive pole of one external terminal, the 3rd switching tube and the 4th switching tube be connected in series in first external connection end
Between the negative pole and positive pole of son；The tie point of the first switch pipe and the second switch pipe is via first inductance connection
The tie point of head end, the 3rd switching tube and the 4th switching tube to the primary side winding of the transformer is connected to described
The tail end of the primary side winding of transformer；The second copped wave unit include the 5th switching tube, the 6th switching tube, the 7th switching tube and
8th switching tube, and the 5th switching tube, the 6th switching tube is connected in series between negative busbar and positive bus-bar, the described 7th opens
Close pipe and the 8th switching tube is connected in series between negative busbar and positive bus-bar；The connection of 5th switching tube, the 6th switching tube
The tie point that point is connected to the head end of vice-side winding of the transformer, the 7th switching tube and the 8th switching tube is connected to institute
State the tail end of the vice-side winding of transformer；
The pulse width of the control terminal that the first copped wave unit is output to according to the second external terminal voltage adjustment
The dutycycle of modulated signal includes：
Detection flows through the electric current of second inductance；
When the electric current for flowing through second inductance is more than or equal to zero, described control unit is to the first switch
The control terminal of pipe exports the first modulated signal, defeated to the control terminal of the second switch pipe and the control terminal of the 6th switching tube
Go out the second modulated signal, export the 3rd modulated signal, the control to the 4th switching tube to the control terminal of the 3rd switching tube
The control terminal of end processed and the 8th switching tube exports the 4th modulated signal, the modulation of control terminal output the 5th to the 5th switching tube
Signal, control terminal the 6th modulated signal of output to the 7th switching tube, and according to the second external terminal voltage progressively
Adjust the dutycycle of first modulated signal, until the second external terminal voltage reach preset value or it is described flow through it is described
The electric current of second inductance is less than zero；First modulated signal, the second modulated signal, the 3rd modulated signal and the 4th modulation letter
Number dutycycle it is identical, and the phase difference of first modulated signal and the second modulated signal for 180 degree, with the described 4th modulation
Signal has same phase；Second modulated signal has same phase, the 5th modulated signal with the 3rd modulated signal
Complementary with the second modulated signal, the 6th modulated signal is complementary with the first modulated signal；
When the electric current for flowing through second inductance is less than zero, described control unit is to the first switch pipe, the
Four switching tubes, the 5th switching tube and the 8th switching tube export the 7th modulated signal, to the second switch pipe, the 3rd switching tube,
6th switching tube and the 7th switching tube export the 8th modulated signal, and according to progressively adjusting the second external terminal voltage
The dutycycle of 7th modulated signal, until the second external terminal voltage reaches preset value；7th modulated signal and the
The dutycycle of eight modulated signals is identical, and the phase difference of the 7th modulated signal and the 8th modulated signal is 180 degree.
The two-way DC converter and bidirectional, dc conversion control method of the present invention, by adjusting pulse width modulating signal
Dutycycle, voltage gain of the adjustment two-way DC converter when backward energy transmits, can gather around two-way DC converter
Ensure the high-efficiency transfer of energy when having larger transfer ratio excursion.
Brief description of the drawings
Fig. 1 is the circuit topology figure of existing buck/boost converter；
Fig. 2 is the circuit topology figure of existing two-stage bidirectional converter；
Fig. 3 is the circuit topology figure of the two-stage bidirectional converter of existing double active structures；
Fig. 4 is the circuit topology figure of the reversible transducer of existing bilateral two-way resonance structure；
Fig. 5 is the schematic diagram of reversible transducer embodiment of the present invention；
Fig. 6 is hair ripple mode and second inductance corresponding current waveform of the reversible transducer of the present invention in startup stage；
Fig. 7 is hair ripple mode and of the reversible transducer of the present invention when the first external terminal output voltage reaches preset value
Two inductance corresponding current waveforms；
Fig. 8 be from continuous current mode be switched to discontinuous current mode when the second inductive current limping figure.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 5, being the schematic diagram of two-way DC converter embodiment of the present invention, the two-way DC converter can be realized
Bidirectional energy transmits.Two-way DC converter in the present embodiment includes the first copped wave unit 51, the second copped wave unit 52, first
Inductance L1, the second inductance L2, transformer Tx1, voltage detection unit and control unit, wherein voltage detection unit are connected to
One external terminal V1DC, to detect the first external terminal V1DC voltage；First side of the first copped wave unit 51 is connected to first
External terminal V1DC, the second side of the first copped wave unit 51 are connected to transformer Tx1 primary side winding via the first inductance L1；The
Two copped wave units 52 use H bridge chopper circuits, and the first side of the second copped wave unit 52 be connected to transformer Tx1 secondary around
Group, the second side of the second copped wave unit 52 are connected to positive bus-bar (+) and negative busbar (-)；Have between above-mentioned positive bus-bar and negative busbar
There is the first electric capacity Cb, there is the second inductance being connected in series between the centre tap and negative busbar of transformer Tx1 vice-side winding
L2 and the second electric capacity C2DC, and the second electric capacity C2DCBoth ends be connected to the second external terminal V2DC.Above-mentioned first electric capacity Cb is used for
Energy is absorbed in the chopping process of the second copped wave unit 52, so that positive pole line voltage reaches certain magnitude of voltage；Second electric capacity C2DC
For when energy is inputted by the second external terminal V2DC, being filtered to the direct current of the second external terminal V2DC inputs.
Above-mentioned control unit is connected to the control terminal of the first copped wave unit 51 and the second copped wave unit 52, to realize copped wave control
System and rectification control.The control unit specifically may include the storage device for being stored with control instruction and executable control instruction
Chip, and above-mentioned control instruction is used for when energy flows to the second external terminal V2DC by the first external terminal V1DC, according to electricity
The voltage that pressure detection unit measures in real time constantly adjustment is output to the pulse width modulation letter of the control terminal of the first copped wave unit 51
Number dutycycle, until the voltage that voltage detection unit measures reaches preset value.
Above-mentioned first copped wave unit 51 uses H bridge chopper circuits, and it specifically includes first switch pipe Qp1, second switch pipe
Qp2, the 3rd switching tube Qp3 and the 4th switching tube Qp4, and first switch pipe Qp1, second switch pipe Qp2 are connected in series in first
Between external terminal V1DC negative pole (-) and positive pole (+), the 3rd switching tube Qp3 and the 4th switching tube Qp4 be connected in series in first
Between external terminal V1DC negative pole (-) and positive pole (+)；First switch pipe Qp1 and second switch pipe Qp2 tie point are via
One inductance L1 is connected to the head end of transformer Tx1 primary side winding, the 3rd switching tube Qp3 and the 4th switching tube Qp4 tie point
It is connected to the tail end of transformer Tx1 primary side winding.
Above-mentioned second copped wave unit 52 equally uses H bridge chopper circuits, and it specifically includes the 5th switching tube Qs1, the 6th opened
Pipe Qs2, the 7th switching tube Qs3 and the 8th switching tube Qs4 are closed, and the 5th switching tube Qs1, the 6th switching tube Qs2 are connected in series in
Between negative busbar and positive bus-bar, the 7th switching tube Qs3 and the 8th switching tube Qs4 be connected in series between negative busbar and positive bus-bar；
5th switching tube Qs1, the 6th switching tube Qs2 tie point are connected to head end, the 7th switching tube of transformer Tx1 vice-side winding
Qs3 and the 8th switching tube Qs4 tie point are connected to the tail end of transformer Tx2 vice-side winding.
Above-mentioned first switch pipe Qp1, second switch pipe Qp2, the 3rd switching tube Qp3, the 4th switching tube Qp4, the 5th switch
Pipe Qs1, the 6th switching tube Qs2, the 7th switching tube Qs3 and the 8th switching tube Qs4 can specifically use IGBT (Insulated Gate
Bipolar Transistor, insulated gate bipolar transistor) or MOSFET (Metallic Oxide Semiconductor
Field Effect Transistor, mos field effect transistor) etc..
Carrying out forward drive, (i.e. energy is flowed two-way DC converter in the present embodiment by the first external terminal V1DC
To the second external terminal V2DC) when, control unit is external from first to control as control variable using pulse width and pulse spacing
Voltage gains of the terminal V1DC to the second external terminal V2DC.Under above-mentioned control mode, the frequency of pulse width modulating signal can
With (can pre-set as needed) be to determine or change.Flowed in energy by the first external terminal V1DC
During the second external terminal V2DC, control unit is according to from the first external terminal V1DC to the second external terminal V2DC voltage gain
Generation with target duty than pulse width modulating signal and be output to the control terminal of the first copped wave unit 51, while to second
Copped wave unit 52 exports the pulse width modulating signal for making the second copped wave unit 52 carry out rectification processing.
In two-way DC converter forward drive, (energy flows to the second external terminal by the first external terminal V1DC
When V2DC), control unit can make two-way to the first copped wave unit 51 and the output pulse width modulated signal of the second copped wave unit 52
DC converter works in continuous current mode (Continuous Conduction Mode, CCM).
Specifically, as shown in fig. 6, when two-way DC converter works in continuous current mode, control unit is to first
Switching tube Qp1 control terminal exports the first modulated signal, to second switch pipe Qp2 control terminal and the 6th switching tube Qs2 control
End processed exports the second modulated signal, the 3rd modulated signal exported to the 3rd switching tube Qp3 control terminal, to the 4th switching tube Qp4
Control terminal and the 8th switching tube Qs1 control terminal export the 4th modulated signal, the control terminal output the to the 5th switching tube Qs1
Five modulated signals, control terminal the 6th modulated signal of output to the 7th switching tube Qs3, and measured according to voltage detection unit
Voltage progressively adjusts the dutycycle of the first modulated signal, until the voltage that voltage detection unit measures reaches preset value；Above-mentioned
One modulated signal, the second modulated signal, the dutycycle of the 3rd modulated signal and the 4th modulated signal are identical, and the first modulation letter
Number be 180 degree with the phase difference of the second modulated signal, there is same phase with the 4th modulated signal (i.e. phase difference is zero)；The
Two modulated signals have same phase with the 3rd modulated signal；5th modulated signal is complementary with the second modulated signal, the 6th modulation
Signal and the first modulated signal are complementary.In actual applications, also can be by the second modulated signal, the 3rd modulated signal, the 4th modulation
Any one in signal, the 5th modulated signal and the 6th modulated signal is as regulating object, so that other modulated signals are corresponding
Change, realize that the second external terminal V2DC voltages adjust.
When two-way DC converter works in continuous current mode, the open loop input voltage of the two-way DC converter
V1DC(i.e. the first external terminal voltage) and output voltage V2DC(i.e. the second external terminal voltage) substantially meets following calculating formula
(1)：
Wherein tonFor the pulse width of the first modulated signal, Ts is the cycle of the first modulated signal, and N is the primary side of transformer
2 times of the turn ratio of winding and vice-side winding.
Especially, to avoid the first external terminal V1DC from leading directly to, the dutycycle of above-mentioned first modulated signal is consistently less than
0.5.And the initial value of the dutycycle of the first modulated signal can be then arranged as required to, outside the first external terminal V1DC to second
Connecting terminal V2DC voltage gain is bigger, and the initial value of the dutycycle of the first modulated signal is smaller.
Also, above-mentioned control unit reduces the first modulation letter when the voltage that voltage detection unit measures is more than preset value
Number dutycycle；The control unit increases the first modulation letter when the voltage that voltage detection unit measures is less than preset value
Number dutycycle.Similarly, control unit adjusts the amplitude of the dutycycle of the first modulated signal and can be arranged as required to each time,
The voltage that voltage detection unit measures differs bigger with preset value, and the modulation amplitude of dutycycle is bigger.
(it is external that energy by the first external terminal V1DC flows to second in addition, in two-way DC converter forward drive
Terminal V2DC) when, control unit can also be to the first copped wave unit 51 and the output pulse width of the second copped wave unit 52 modulation letter
Number, two-way DC converter is worked in continuous current mode (Continuous Conduction Mode, CCM) and discontinuously electricity
Stream mode (Discontinuous Conduction Mode, DCM).
Specifically, it is above-mentioned two-way straight when two-way DC converter works in continuous current mode and discontinuous current mode
Current converter also includes a current detecting unit for being used to detect the second inductor current value.In the electricity that current detecting unit measures
When stream is more than or equal to zero (be consistently greater than zero), control unit makes two-way DC converter work in continuous current mode, i.e., to
First switch pipe Qp1 control terminal exports the first modulated signal, control terminal and the 6th switching tube Qs2 to second switch pipe Qp2
Control terminal export the second modulated signal, export the 3rd modulated signal, to the 4th switching tube to the 3rd switching tube Qp3 control terminal
Qp4 control terminal and the 8th switching tube Qs1 control terminal export the 4th modulated signal, to the 5th switching tube Qs1 control terminal it is defeated
Go out the 5th modulated signal, export the 6th modulated signal to the 7th switching tube Qs3 control terminal, and measured according to voltage detection unit
Voltage progressively adjust the dutycycle of the first modulated signal, until the voltage that voltage detection unit measures reaches preset value；It is above-mentioned
First modulated signal, the second modulated signal, the dutycycle of the 3rd modulated signal and the 4th modulated signal are identical, and the first modulation
Signal and the phase difference of the second modulated signal are 180 degree, have same phase with the 4th modulated signal (i.e. phase difference is zero)；The
Two modulated signals have same phase with the 3rd modulated signal；5th modulated signal is complementary with the second modulated signal, the 6th modulation
Signal and the first modulated signal are complementary.
And once the electric current that current detecting unit measures is less than zero, two-way DC converter is switched to discontinuously by control unit
Current-mode (the second front and rear inductive current of switching is as shown in Figure 8), as shown in fig. 7, being opened to first switch pipe Qp1, the 4th
Pipe Qp4, the 5th switching tube Qs1 and the 8th switching tube Qs4 is closed to export the 7th modulated signal, switch to second switch pipe Qp2, the 3rd
Pipe Qp3, the 6th switching tube Qs2 and the 7th switching tube Qs3 export the 8th modulated signal, and measured according to voltage detection unit
Voltage progressively adjusts the dutycycle of the 7th modulated signal, until the voltage that voltage detection unit measures reaches preset value；On
State that the 7th modulated signal is identical with the dutycycle of the 8th modulated signal, and the phase difference of the 7th modulated signal and the 8th modulated signal
For 180 degree.Similarly, also can be using the 8th modulated signal as regulating object, so that the 7th modulated signal respective change, real
Existing first external terminal V1DC voltages adjustment.
When two-way DC converter works in discontinuous current mode, the open loop input voltage of the two-way DC converter
V1DC(i.e. the first external terminal voltage) and output voltage V2DC(i.e. the second external terminal voltage) substantially meets following calculating formula
(2)：
Wherein Ro is connected the equivalent resistance of load by the second external terminal, and L is the inductance value of the second inductance.
Similarly, to avoid the first external terminal V1DC from leading directly to, above-mentioned first modulated signal, the duty of the 7th modulated signal
Than being consistently less than 0.5.And the initial value of the dutycycle of the 7th modulated signal is then the dutycycle of the first modulated signal before switching.Control
Unit processed reduces accounting for for the first modulated signal and the 7th modulated signal when the voltage that voltage detection unit measures is more than preset value
The empty duty for comparing, the first modulated signal and the 7th modulated signal being increased when the voltage that voltage detection unit measures is less than preset value
Than.
The present invention also provides a kind of bidirectional, dc conversion control method, and it is external by the first external terminal to flow to second in energy
Include during terminal：
Detect the second external terminal voltage；
The pulse width modulating signal of the control terminal of the first copped wave unit is output to according to the adjustment of the second external terminal voltage
Dutycycle, until the second external terminal voltage reaches preset value；Wherein, the first side of the first copped wave unit is connected to outside first
The primary side winding of connecting terminal, opposite side via the first inductance connection to the transformer；
Make the second copped wave unit by the pair of transformer to the control terminal output pulse width modulated signal of the second copped wave unit
The output of side winding is rectified into DC voltage；Wherein, the first side of the second copped wave unit is connected to the vice-side winding of transformer,
Two sides are connected to positive bus-bar and negative busbar；There is the first electric capacity, the vice-side winding of the transformer between positive bus-bar and negative busbar
Centre tap and negative busbar between there is the second inductance and the second electric capacity that are connected in series, and the both ends of the second electric capacity are connected to
Second external terminal.
H bridge chopper circuits, i.e. the first copped wave unit bag can be respectively adopted in above-mentioned first copped wave unit and the second copped wave unit
First switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube are included, and the series connection of first switch pipe, second switch pipe connects
It is connected between the negative pole and positive pole of the first external terminal, that the 3rd switching tube and the 4th switching tube are connected in series in described first is external
Between the negative pole and positive pole of terminal；The tie point of first switch pipe and second switch pipe is via first inductance connection to transformation
The tie point of the head end of the primary side winding of device, the 3rd switching tube and the 4th switching tube is connected to the primary side winding of transformer
Tail end；Second copped wave unit includes the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube, and the 5th switch
Pipe, the 6th switching tube are connected in series between negative busbar and positive bus-bar, the 7th switching tube and the 8th switching tube be connected in series in it is negative
Between bus and positive bus-bar；5th switching tube, the tie point of the 6th switching tube are connected to the head end of the vice-side winding of transformer,
The tie point of seven switching tubes and the 8th switching tube is connected to the tail end of the vice-side winding of transformer.
When controlling energy to flow to the second external terminal from the first external terminal, two-way DC converter can be made to work all the time
It is in continuous current mode, i.e., wide in the pulse for the control terminal for being output to the first copped wave unit according to the adjustment of the second external terminal voltage
When spending the dutycycle of modulated signal, the first modulated signal, the control to second switch pipe are exported to the control terminal of first switch pipe
Hold and export the second modulated signal with the control terminal of the 6th switching tube, the 3rd modulated signal is exported to the control terminal of the 3rd switching tube,
The control terminal of control terminal and the 8th switching tube to the 4th switching tube exports the 4th modulated signal, the control terminal to the 5th switching tube
Export the 5th modulated signal, export the 6th modulated signal to the control terminal of the 7th switching tube, and according to the second external terminal voltage
The dutycycle of the first modulated signal is progressively adjusted, until the second external terminal voltage reaches preset value.Above-mentioned first modulated signal,
The dutycycle of second modulated signal, the 3rd modulated signal and the 4th modulated signal is identical, and the first modulated signal is adjusted with second
The phase difference of signal processed is 180 degree, has same phase with the 4th modulated signal；Second modulated signal has with the 3rd modulated signal
There is same phase；5th modulated signal is complementary with the second modulated signal, and the 6th modulated signal is complementary with the first modulated signal.
When above-mentioned two-way DC converter is in continuous current mode, to avoid the first external terminal V1DC from leading directly to, on
The dutycycle for stating the first modulated signal is consistently less than 0.5.And the initial value of the dutycycle of the first modulated signal then can be as needed
Set, the voltage gain from the first external terminal V1DC to the second external terminal V2DC is bigger, the dutycycle of the first modulated signal
Initial value it is smaller.Also, when carrying out dutycycle adjustment, if the second external terminal voltage is more than preset value, reduce first
The dutycycle of modulated signal；If the second external terminal voltage is less than preset value, the dutycycle of first modulated signal is increased.
Also, adjusting the amplitude of the dutycycle of the first modulated signal each time can be arranged as required to, usual second external terminal voltage
Differ bigger with preset value, the modulation amplitude of dutycycle is bigger.
In addition, when controlling energy to flow to the second external terminal from the first external terminal, it can also make two-way DC converter
Continuous current mode and discontinuous current mode are always worked in, i.e., is output to first according to the adjustment of the second external terminal voltage and cuts
During the dutycycle of the pulse width modulating signal of the control terminal of ripple unit, detection is also needed to flow through the electric current of the second inductance.Flowing through
When the electric current of second inductance is more than or equal to zero, the first modulated signal is exported, to second to the control terminal of first switch pipe first
The control terminal of switching tube and the control terminal of the 6th switching tube export the second modulated signal, the control terminal output to the 3rd switching tube the
Three modulated signals, to the control terminal of the 4th switching tube and the control terminal of the 8th switching tube export the 4th modulated signal, open to the 5th
The control terminal for closing pipe exports the 5th modulated signal, exports the 6th modulated signal to the control terminal of the 7th switching tube, and according to second
The voltage that external terminal measures progressively adjusts the dutycycle of first modulated signal, until the second external terminal voltage reaches pre-
If value flows through the electric current of the second inductance less than zero.Above-mentioned first modulated signal, the second modulated signal, the 3rd modulated signal and
The dutycycle of 4th modulated signal is identical, and the phase difference of the first modulated signal and the second modulated signal is adjusted for 180 degree, with the 4th
Signal processed has same phase；Second modulated signal has same phase, the 5th modulated signal and second with the 3rd modulated signal
Modulated signal is complementary, and the 6th modulated signal is complementary with the first modulated signal.
When detecting that the electric current for flowing through the second inductance is less than zero, that is, discontinuous current mode is switched to, to first switch
Pipe, the 4th switching tube, the 5th switching tube and the 8th switching tube export the 7th modulated signal, to second switch pipe, the 3rd switching tube,
6th switching tube and the 7th switching tube export the 8th modulated signal, and progressively adjust the 7th modulation according to the second external terminal voltage
The dutycycle of signal, until the second external terminal voltage reaches preset value.The duty of 7th modulated signal and the 8th modulated signal
Than identical, and the phase difference of the 7th modulated signal and the 8th modulated signal is 180 degree.
Similarly, to avoid the first external terminal V1DC from leading directly to, above-mentioned first modulated signal, the duty of the 7th modulated signal
Than being consistently less than 0.5.And the initial value of the dutycycle of the 7th modulated signal is then the dutycycle of the first modulated signal before switching.Control
Unit processed reduce when the second external terminal voltage is more than preset value the first modulated signal and the 7th modulated signal dutycycle,
Second external terminal voltage increases the dutycycle of the first modulated signal and the 7th modulated signal when being less than preset value.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (10)
1. a kind of two-way DC converter, including the first copped wave unit, the second copped wave unit, transformer and control unit, institute
The first side for stating the first copped wave unit is connected to the first external terminal, the second side via the first inductance connection to the transformer
First side winding；It is characterized in that：First side of the second copped wave unit is connected to the second side winding of the transformer,
Two sides are connected to positive bus-bar and negative busbar；There is the first electric capacity, the secondary of the transformer between the positive bus-bar and negative busbar
The second inductance and the second electric capacity, and the two of second electric capacity are connected in series between the centre tap of winding and the negative busbar
End is connected to the second external terminal；The two-way DC converter also includes being used for the voltage inspection for detecting the second external terminal voltage
Survey unit；Described control unit is connected to the control terminal of the first copped wave unit and the second copped wave unit, and the control is single
For member when energy flows to the second external terminal by the first external terminal, the voltage adjustment measured according to the voltage detection unit is defeated
Go out the dutycycle of the pulse width modulating signal of the control terminal to the first copped wave unit, measured until the voltage detection unit
Voltage reaches preset value.
2. two-way DC converter according to claim 1, it is characterised in that：The first copped wave unit is opened including first
Guan Guan, second switch pipe, the 3rd switching tube and the 4th switching tube, and the first switch pipe, second switch pipe are connected in series in
Between the negative pole and positive pole of first external terminal, the 3rd switching tube and the 4th switching tube be connected in series in described first
Between the negative pole and positive pole of external terminal；The tie point of the first switch pipe and the second switch pipe is via the described first electricity
Head end, the 3rd switching tube for feeling the primary side winding for being connected to the transformer connect with the tie point of the 4th switching tube
To the tail end of the primary side winding of the transformer；
The second copped wave unit includes the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube, and described
Five switching tubes, the 6th switching tube are connected in series between negative busbar and positive bus-bar, the 7th switching tube and the 8th switching tube string
Connection is connected between negative busbar and positive bus-bar；5th switching tube, the tie point of the 6th switching tube are connected to the transformer
The head end of vice-side winding, the tie point of the 7th switching tube and the 8th switching tube be connected to the vice-side winding of the transformer
Tail end；
When energy flows to the second external terminal by the first external terminal, control of the described control unit to the first switch pipe
End exports the first modulated signal, adjusted to the control terminal of the second switch pipe and the control terminal output second of the 6th switching tube
Signal processed, export to the control terminal of the 3rd switching tube the 3rd modulated signal, to the control terminal of the 4th switching tube and the
The control terminals of eight switching tubes exports the 4th modulated signal, the 5th modulated signal exported to the control terminal of the 5th switching tube, to
The control terminal of 7th switching tube exports the 6th modulated signal, and the voltage measured according to the voltage detection unit is progressively adjusted
The dutycycle of whole first modulated signal, until the voltage that the voltage detection unit measures reaches preset value；Described first
Modulated signal, the second modulated signal, the dutycycle of the 3rd modulated signal and the 4th modulated signal are identical, and first modulation
Signal and the phase difference of the second modulated signal are 180 degree, have same phase with the 4th modulated signal；Second modulation
Signal and the 3rd modulated signal have same phase；5th modulated signal is complementary with the second modulated signal, and the described 6th adjusts
Signal processed and the first modulated signal are complementary.
3. two-way DC converter according to claim 2, it is characterised in that：The dutycycle of first modulated signal is small
In 0.5.
4. two-way DC converter according to claim 2, it is characterised in that：Described control unit is in the voltage detecting
The voltage that unit measures reduces the dutycycle of first modulated signal, measured in the voltage detection unit when being more than preset value
Voltage the dutycycle of first modulated signal is increased when being less than preset value.
5. two-way DC converter according to claim 1, it is characterised in that：The two-way DC converter includes being used for
Detect the current detecting unit of the second inductor current value；
The first copped wave unit includes first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, and described
One switching tube, second switch pipe are connected in series between the negative pole and positive pole of first external terminal, the 3rd switching tube
And the 4th switching tube be connected in series between the negative pole and positive pole of first external terminal；The first switch pipe and described
Head end, threeth switch of the tie point of two switching tubes via primary side winding of first inductance connection to the transformer
The tie point of pipe and the 4th switching tube is connected to the tail end of the primary side winding of the transformer；
The second copped wave unit includes the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube, and described
Five switching tubes, the 6th switching tube are connected in series between negative busbar and positive bus-bar, the 7th switching tube and the 8th switching tube string
Connection is connected between negative busbar and positive bus-bar；5th switching tube, the tie point of the 6th switching tube are connected to the transformer
The head end of vice-side winding, the tie point of the 7th switching tube and the 8th switching tube be connected to the vice-side winding of the transformer
Tail end；
The second external terminal is flowed to by the first external terminal in energy, and the electric current that the current detecting unit measures is more than or waited
When zero, described control unit exports the first modulated signal, to the second switch pipe to the control terminal of the first switch pipe
Control terminal and the 6th switching tube control terminal export the second modulated signal, to the 3rd switching tube control terminal export
3rd modulated signal, to the 4th switching tube control terminal and the 8th switching tube control terminal export the 4th modulated signal, to
The control terminal of 5th switching tube exports the 5th modulated signal, the modulation of control terminal output the 6th to the 7th switching tube is believed
Number, and the voltage measured according to the voltage detection unit progressively adjusts the dutycycle of first modulated signal, until described
The voltage that voltage detection unit measures reaches the electric current that preset value or the current detecting unit measure and is less than zero；Described first adjusts
Signal processed, the second modulated signal, the dutycycle of the 3rd modulated signal and the 4th modulated signal are identical, and the first modulation letter
Number there is same phase for 180 degree, with the 4th modulated signal with the phase difference of the second modulated signal；The second modulation letter
Number there is same phase with the 3rd modulated signal, the 5th modulated signal is complementary with the second modulated signal, the 6th modulation
Signal and the first modulated signal are complementary；
The second external terminal is flowed to by the first external terminal in energy, and the electric current that the current detecting unit measures is less than zero
When, described control unit is modulated to the first switch pipe, the 4th switching tube, the 5th switching tube and the 8th switching tube output the 7th
Signal, the 8th modulated signal, and root are exported to the second switch pipe, the 3rd switching tube, the 6th switching tube and the 7th switching tube
The voltage measured according to the voltage detection unit progressively adjusts the dutycycle of the 7th modulated signal, until the voltage detecting
The voltage that unit measures reaches preset value；7th modulated signal is identical with the dutycycle of the 8th modulated signal, and described
The phase difference of seven modulated signals and the 8th modulated signal is 180 degree.
6. two-way DC converter according to claim 5, it is characterised in that：First modulated signal and the 7th modulation
The dutycycle of signal is less than 0.5.
7. two-way DC converter according to claim 5, it is characterised in that：Described control unit is in the voltage detecting
The voltage that unit measures reduces the dutycycle of first modulated signal and the 7th modulated signal, in the electricity when being more than preset value
The voltage that pressure detection unit measures increases the dutycycle of first modulated signal and the 7th modulated signal when being less than preset value.
8. a kind of bidirectional, dc conversion control method, it is characterised in that the second external connection end is flowed to by the first external terminal in energy
The period of the day from 11 p.m. to 1 a.m includes：
Detect the second external terminal voltage；
The pulse width modulating signal of the control terminal of the first copped wave unit is output to according to the second external terminal voltage adjustment
Dutycycle, until the second external terminal voltage reaches preset value；Wherein, the first side connection of the first copped wave unit
Primary side winding to the first external terminal, opposite side via the first inductance connection to the transformer；
Make the second copped wave unit by the transformer to the control terminal output pulse width modulated signal of the second copped wave unit
The output of vice-side winding be rectified into DC voltage；Wherein, the first side of the second copped wave unit is connected to the pair of transformer
Side winding, the second side are connected to positive bus-bar and negative busbar；There is the first electric capacity, the transformation between the positive bus-bar and negative busbar
There is the second inductance and the second electric capacity being connected in series, and described second between the centre tap and negative busbar of the vice-side winding of device
The both ends of electric capacity are connected to the second external terminal.
9. bidirectional, dc conversion control method according to claim 8, it is characterised in that：The first copped wave unit includes
First switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, and the first switch pipe, second switch pipe are connected
It is connected between the negative pole and positive pole of first external terminal, the 3rd switching tube and the 4th switching tube are connected in series in institute
Between the negative pole and positive pole of stating the first external terminal；The tie point of the first switch pipe and the second switch pipe is via described
Connection of first inductance connection to the head end of the primary side winding of the transformer, the 3rd switching tube and the 4th switching tube
Point is connected to the tail end of the primary side winding of the transformer；The second copped wave unit include the 5th switching tube, the 6th switching tube,
7th switching tube and the 8th switching tube, and the 5th switching tube, the 6th switching tube be connected in series in negative busbar and positive bus-bar it
Between, the 7th switching tube and the 8th switching tube be connected in series between negative busbar and positive bus-bar；5th switching tube, the 6th
The tie point of switching tube is connected to the company of the head end of the vice-side winding of the transformer, the 7th switching tube and the 8th switching tube
Contact is connected to the tail end of the vice-side winding of the transformer；
The pulse width modulation of the control terminal that the first copped wave unit is output to according to the second external terminal voltage adjustment
The dutycycle of signal includes：The first modulated signal is exported to the control terminal of the first switch pipe, to the second switch pipe
Control terminal and the control terminal of the 6th switching tube export the second modulated signal, the control terminal output to the 3rd switching tube the
Three modulated signals, to the control terminal of the 4th switching tube and the control terminal of the 8th switching tube export the 4th modulated signal, to institute
The control terminal for stating the 5th switching tube exports the 5th modulated signal, the modulation of control terminal output the 6th to the 7th switching tube is believed
Number, and the dutycycle of first modulated signal is progressively adjusted according to the second external terminal voltage, until second external connection end
Sub- voltage reaches preset value；First modulated signal, the second modulated signal, the 3rd modulated signal and the 4th modulated signal
Dutycycle is identical, and the phase difference of first modulated signal and the second modulated signal is 180 degree and the 4th modulated signal
With same phase；Second modulated signal has same phase with the 3rd modulated signal；5th modulated signal and the
Two modulated signals are complementary, and the 6th modulated signal is complementary with the first modulated signal.
10. bidirectional, dc conversion control method according to claim 8, it is characterised in that：The first copped wave unit bag
Include first switch pipe, second switch pipe, the 3rd switching tube and the 4th switching tube, and the first switch pipe, second switch pipe string
Connection is connected between the negative pole and positive pole of first external terminal, the 3rd switching tube and the 4th switching tube are connected in series in
Between the negative pole and positive pole of first external terminal；The tie point of the first switch pipe and the second switch pipe is via institute
The first inductance connection is stated to the company of the head end of the primary side winding of the transformer, the 3rd switching tube and the 4th switching tube
Contact is connected to the tail end of the primary side winding of the transformer；The second copped wave unit includes the 5th switching tube, the 6th switch
Pipe, the 7th switching tube and the 8th switching tube, and the 5th switching tube, the 6th switching tube are connected in series in negative busbar and positive bus-bar
Between, the 7th switching tube and the 8th switching tube be connected in series between negative busbar and positive bus-bar；5th switching tube,
The tie point of six switching tubes is connected to the head end of the vice-side winding of the transformer, the 7th switching tube and the 8th switching tube
Tie point is connected to the tail end of the vice-side winding of the transformer；
The pulse width modulation of the control terminal that the first copped wave unit is output to according to the second external terminal voltage adjustment
The dutycycle of signal includes：
Detection flows through the electric current of second inductance；
When the electric current for flowing through second inductance is more than or equal to zero, described control unit is to the first switch pipe
Control terminal exports the first modulated signal, to the control terminal of the second switch pipe and the control terminal output the of the 6th switching tube
Two modulated signals, the 3rd modulated signal of control terminal output, the control terminal to the 4th switching tube to the 3rd switching tube
The 4th modulated signal is exported with the control terminal of the 8th switching tube, the modulation of control terminal output the 5th to the 5th switching tube is believed
Number, to the control terminal of the 7th switching tube export the 6th modulated signal, and progressively adjusted according to the second external terminal voltage
The dutycycle of whole first modulated signal, until the second external terminal voltage reaches preset value or flows through second electricity
The electric current of sense is less than zero；First modulated signal, the second modulated signal, the 3rd modulated signal and the 4th modulated signal account for
Sky is than identical, and the phase difference of first modulated signal and the second modulated signal has for 180 degree, with the 4th modulated signal
There is same phase；Second modulated signal has same phase, the 5th modulated signal and second with the 3rd modulated signal
Modulated signal is complementary, and the 6th modulated signal is complementary with the first modulated signal；
When the electric current for flowing through second inductance is less than zero, described control unit is opened to the first switch pipe, the 4th
Guan Guan, the 5th switching tube and the 8th switching tube export the 7th modulated signal, to the second switch pipe, the 3rd switching tube, the 6th
Switching tube and the 7th switching tube export the 8th modulated signal, and progressively adjust the described 7th according to the second external terminal voltage
The dutycycle of modulated signal, until the second external terminal voltage reaches preset value；7th modulated signal is adjusted with the 8th
The dutycycle of signal processed is identical, and the phase difference of the 7th modulated signal and the 8th modulated signal is 180 degree.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492751A (en) * | 2019-08-07 | 2019-11-22 | 苏州汇川联合动力***有限公司 | Direct-current voltage reducing circuit, method, equipment and computer readable storage medium |
| CN112379165A (en) * | 2020-10-16 | 2021-02-19 | 珠海泰坦新动力电子有限公司 | Current phase detection and adjustment circuit and current phase adjustment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267160A (en) * | 2008-04-25 | 2008-09-17 | 艾默生网络能源有限公司 | A soft switch circuit |
| CN101282084A (en) * | 2007-04-06 | 2008-10-08 | 群康科技(深圳)有限公司 | Power supply circuit and LCD device using the same |
| CN104501487A (en) * | 2014-12-12 | 2015-04-08 | 贵州永红航空机械有限责任公司 | High-reliability transportation refrigerator |
| WO2016121705A1 (en) * | 2015-01-28 | 2016-08-04 | オムロン株式会社 | Bidirectional dc-dc converter, power conditioner, and dispersed power supply system |
-
2017
- 2017-08-10 CN CN201710680689.0A patent/CN107659155B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282084A (en) * | 2007-04-06 | 2008-10-08 | 群康科技(深圳)有限公司 | Power supply circuit and LCD device using the same |
| CN101267160A (en) * | 2008-04-25 | 2008-09-17 | 艾默生网络能源有限公司 | A soft switch circuit |
| CN104501487A (en) * | 2014-12-12 | 2015-04-08 | 贵州永红航空机械有限责任公司 | High-reliability transportation refrigerator |
| WO2016121705A1 (en) * | 2015-01-28 | 2016-08-04 | オムロン株式会社 | Bidirectional dc-dc converter, power conditioner, and dispersed power supply system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492751A (en) * | 2019-08-07 | 2019-11-22 | 苏州汇川联合动力***有限公司 | Direct-current voltage reducing circuit, method, equipment and computer readable storage medium |
| CN110492751B (en) * | 2019-08-07 | 2024-02-27 | 苏州汇川联合动力***股份有限公司 | DC step-down circuit, DC step-down method, DC step-down device, and computer readable storage medium |
| CN112379165A (en) * | 2020-10-16 | 2021-02-19 | 珠海泰坦新动力电子有限公司 | Current phase detection and adjustment circuit and current phase adjustment method |
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| CN107659155B (en) | 2019-12-17 |
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |