CN105553274A - Current critical continuous unified control method for bidirectional DC-DC converter - Google Patents
Current critical continuous unified control method for bidirectional DC-DC converter Download PDFInfo
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- CN105553274A CN105553274A CN201511001369.5A CN201511001369A CN105553274A CN 105553274 A CN105553274 A CN 105553274A CN 201511001369 A CN201511001369 A CN 201511001369A CN 105553274 A CN105553274 A CN 105553274A
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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
- H02M3/3353—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
-
- 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
- H02M3/33592—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 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a current critical continuous unified control method for a bidirectional DC-DC converter, relates to a current critical continuous unified control method for a dual-active bridge bidirectional DC-DC converter, and belongs to the field of power electronics. According to the control method disclosed by the invention, voltages on a primary side and a secondary side of a transformer and a phase difference between the voltages are controlled to make the converter work in a transformer current critical continuous mode and reduce the ring current and conduction loss of the converter. In addition, a transformer current can be enabled to be in a critical continuous mode through a boundary condition and a control condition, so that the reactive loss of a circuit is reduced, the current stress of a switching tube and the ring current loss of the converter are reduced, and the efficiency and reliability of the converter can be improved. The method further can greatly lower the complexity of a control unit and realize real-time control. The method can be applied to high-frequency isolation switching power supplies.
Description
Technical field
The present invention relates to a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method, particularly relate to a kind of electric current critical continuous mode unified control method of two active bridge bidirectional DC-DC converter, belong to the high-frequency isolation Switching Power Supply direction of field of power electronics.
Background technology
Along with the development of power electronic technology, two-way, high-frequency isolation, high efficiency converter demand progressively increases, and is especially comprising the solid-state transformer of energy-storage units, high voltage direct current transmission, the various electric power system occasion such as micro-capacitance sensor.These systems, owing to needing energy hole energy-storage units being carried out to discharge and recharge, require that converter has the feature of two-way controlled power stream.In addition, high transmission efficiency can improve the power density of whole converting means, increases reliability, cost-saving, therefore also becomes another important index.For aforesaid application scenario, two active bridge bidirectional DC-DC converter because it is with a wide range of applications by large quantity research.
As shown in Figure 1, this topological structure is symmetrical structure to the topology diagram of a kind of bidirectional DC-DC converter of common type, the full-bridge circuit that transformer primary side and secondary side are all made up of switching tube, and two described full-bridge circuits are connected by a high frequency transformer.The converter of this type comprises three control variables, the voltage v between two the brachium pontis central points comprising primary side full-bridge circuit
aB, the voltage v between secondary side full-bridge circuit two brachium pontis central points
cD, and v
aBand v
cDbetween shift to angle.Can regulation voltage v by the drive singal controlling primary side switching tube
aBduty ratio size; Can regulation voltage v by the drive singal controlling secondary side switches pipe
cDduty ratio size; Can realize v by regulating the phase difference between primary side and secondary side switches pipe signal
aBand v
cDbetween the control shifting to angle.Two large classes can be divided into for two active bridge bi-directional DC-DC converter control method at present: a) traditionally singly shift to control strategy, b) shift to and add PWM control strategy.Wherein shift to add PWM control strategy again can the control strategy of two control freedom degrees and the control strategy of three control freedom degrees.
2007 at IEEETransactiononpowerelectronics[power electronics periodical] on deliver ' an AbidirectionalDC-DCconverterforanenergystoragesystemwith galvanicisolation ' literary composition uses and traditional singly shifts to control strategy.The bidirectional flow that this control strategy can realize power controls.But when the voltage fluctuation of energy storage side, its Sofe Switch condition can not meet, and circulation loss and conduction loss can increase.2012 at IEEETransactiononpowerelectronics[power electronics periodical] on " Extended-phase-shiftcontrolofisolatedbidirectionaldc-dcc onverterforpowerdistributioninmicrogrid " literary composition of delivering not only control to shift to angle between two active bridges, shift to angle between two brachium pontis also controlling each active bridge.This method is summarized as and adds PWM control method containing shifting to of two degrees of freedom.The method can effectively reduce reactive loss and circulation loss, but introduces another one control freedom degree, adds the complexity of control, causes this control method to be difficult to real-time calculating.2012 at IEEETransactiononpowerelectronics[power electronics periodical] on " the Stabilityanalysisofisolatedbidirectionaldualactivefull-b ridgedc-dcconverterwithtriplephaseshiftcontrol " that deliver belong to and comprise shifting to of three control freedom degrees and add PWM and control.This method can reduce reactive loss and the circulation loss of converter further, makes converter be operated in the optimum state of gamut input.But control unit comprises three degree of freedom, control unit is made to be difficult to unified and to calculate in real time.And the switching of converter working region wherein adds the complexity of control.
Summary of the invention
For the two active bridge bidirectional DC-DC converter Controller gain variations overcoming aforesaid common type is complicated, reduce the relevant issues such as reactive loss and conduction loss, a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, the technical problem solved provides a kind of two active bridge bidirectional DC-DC converter electric current critical continuous mode the unified method controlled for the topological structure of the bidirectional DC-DC converter of common type, reduce the reactive loss of circuit, reduce the circulation loss of switching tube current stress and converter, improve efficiency and the reliability of converter, greatly can reduce the complexity of control unit simultaneously.
The object of the invention is to be achieved through the following technical solutions.
The two active bridge bidirectional DC-DC converter of common type comprises three control variables, the voltage v between two the brachium pontis central points comprising primary side full-bridge circuit
aB, the voltage v between secondary side full-bridge circuit two brachium pontis central points
cD, and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle.A kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, by the given v of the output voltage by secondary side
refwith the output sampled value V of actual secondary side
2difference as the input of voltage controller, the output of controller is for regulating transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle control signal
according to shifting to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with control transformer secondary side voltage v
cDcontrol signal d
2.Transformer current can be made to be in the pattern of critical continuous mode by described boundary condition and controlled condition.According to shifting to angle control signal
control signal d
1with control signal d
2, drive generation unit to produce corresponding switching tube drive control signal, thus control the primary side voltage v of converter
aBwith Circuit Fault on Secondary Transformer voltage v
cDand transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle Φ.Described boundary condition and controlled condition can make transformer current be in the pattern of critical continuous mode, make converter have larger duty ratio when equal power output and less shift to angle.The reactive loss of circuit is reduced, and the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
Described controller can realize the control to described bidirectional DC-DC converter by means of only a voltage controller, can reduce the complexity of control unit.Described voltage controller preferred proportion integral PI controller.
Described boundary condition is according to shifting to angle control signal
large I is divided into boundary condition (a) and boundary condition (b) two kinds:
When shifting to angle control signal
when being more than or equal to zero, then utilize boundary condition (a) as shown in formula (1),
When shifting to angle control signal
when being less than zero, then utilize boundary condition (b) as shown in formula (2),
Wherein V
1, V
2be respectively the active bridge direct voltage of primary side to converter and secondary side; N is the no-load voltage ratio 1:n of transformer primary side to secondary side.
Described controlled condition is as shown in formula (3).
nV
1d
1＝V
2d
2(3)
Described converter is two-way topological structure, and primary side and secondary side can exchange.
A kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, comprises the steps,
Step one, determine the given V of converter secondary side VD
ref;
Step 2, the primary side of converter and the active bridge direct voltage of secondary side to be sampled, be designated as V respectively
1and V
2.Calculate output voltage set-point V
refwith V
2difference, described difference is as the input of output voltage regulator.The output of described voltage regulator is as transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle control signal
Step 3, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2.Transformer current can be made to be in the pattern of critical continuous mode by described boundary condition and controlled condition.
Step 3.1, to provide for solving control signal d
1or control signal d
2boundary condition.
When shifting to angle control signal
when being more than or equal to zero, then utilizing boundary condition (a) as shown in formula (1), obtain control signal d
1.
When shifting to angle control signal
when being less than zero, then utilizing boundary condition (b) as shown in formula (2), obtain control signal d
2.
Wherein V
1, V
2be respectively the primary side of converter and the active bridge direct voltage sampled value of secondary side, n is the no-load voltage ratio 1:n of transformer primary side to secondary side.
Step 3.2, provide controlled condition as shown in formula (3).
nV
1d
1＝V
2d
2(3)
When shifting to angle control signal
when being more than or equal to zero, according to the control signal d that step 3.1 obtains
1value, utilize formula (3) to solve d
2; When shifting to angle control signal
when being less than zero, according to the control signal d that step 3.1 obtains
2value, utilize formula (3) to solve d
1;
Step 4, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2.By driving generation unit, produce the drive singal of corresponding switching tube, thus control the primary side voltage v of converter
aBwith Circuit Fault on Secondary Transformer voltage v
cDand transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle Φ, make converter have larger duty ratio when equal power output and less shift to angle.The reactive loss of circuit is reduced, and the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
The drive singal of the generation switching tube described in step 4 is determined according to concrete bidirectional DC-DC converter topology.
The drive singal of the generation switching tube described in step 4, for conventional two-way two active bridge DC-DC converter, it comprises eight switching tube drive control signal, is designated as respectively: S
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8.The feature of eight described switching tube drive singal is: all drive singal are all the square-wave signals of 50%; S
1with S
2complementary, S
3with S
4complementary, S
5with S
6complementary, S
7with S
8complementary; S
1advanced S
3time by d
1control, S
5advanced S
7time by d
2control, S
1and S
5between phase difference by
control.
Described converter is two-way topological structure, and primary side and secondary side can exchange.
Beneficial effect:
1, a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, the voltage v between two brachium pontis central points that can be regulated primary side full-bridge circuit by the drive singal controlling primary side switching tube
aB; The voltage v between secondary side full-bridge circuit two brachium pontis central points can be regulated by the drive singal controlling secondary side switches pipe
cD; Can realize v by regulating the phase difference between primary side and secondary side switches pipe signal
aBand v
cDbetween the control shifting to angle.By aforementioned control, when converter is worked transformer current be zero siding-to-siding block length very of short duration, be in critical continuous mode, reduce circulation loss and conduction loss.
2, by a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, can by means of only the voltage v between two brachium pontis central points of a controller realization adjustment primary side full-bridge circuit
aB, voltage v between secondary side full-bridge circuit two brachium pontis central points
cDand v
aBand v
cDbetween the unified of angle of shifting to control.During described method does not need control data to be stored in advance in and tables look-up, can realize real-time control, control loop is simple, reliably.
3, by a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention, the reactive loss of circuit is reduced, the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
Accompanying drawing explanation
Fig. 1 is the two active bridge bidirectional DC-DC converter electrical block diagram of the present embodiment;
Fig. 2 is the unified control method block diagram of the electric current critical continuous mode of the present embodiment;
Fig. 3 is the main oscillogram of this example.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail, also describe technical problem and the beneficial effect of technical solution of the present invention solution simultaneously, it is pointed out that described embodiment is only intended to be convenient to the understanding of the present invention, and any restriction effect is not play to it.
Embodiment 1:
To control to a kind of bidirectional DC-DC converter of common type realizability and beneficial effect that a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method disclosed by the invention is described.
The two active bridge bidirectional DC-DC converter of common type as shown in Figure 1.As shown in the figure, converter is two-way two active bridge DC-DC converter, and primary side is an active full-bridge circuit, and secondary side is also an active full-bridge circuit.A, B point is respectively two brachium pontis mid point separately of the active bridge of primary side; C, D point is respectively the two brachium pontis mid point separately of the active bridge of secondary side; v
aBfor the voltage difference between A point and B point; v
cDfor the voltage difference between C point and D point.I
pand i
sfor the transformer primary side of converter and the electric current of secondary side.V
1for the direct voltage of primary side; V
2for the direct voltage of secondary side.
The control block diagram that the present embodiment adopts as shown in Figure 2.Composition graphs 2, disclosed in the present embodiment, a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method, comprises the steps,
Step one, determine the given V of converter secondary side VD
ref;
Step 2, the primary side of converter and the active bridge direct voltage of secondary side to be sampled, be designated as V respectively
1and V
2.Calculate output voltage set-point V
refwith V
2difference, described difference is as the input of output voltage regulator.The output of described voltage controller is as transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle control signal
wherein, the output of controller needs positive and negative amplitude limit.
Step 3, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2.Transformer current can be made to be in the pattern of critical continuous mode by described boundary condition and controlled condition.
Step 3.1, to provide for solving control signal d
1or control signal d
2boundary condition.
When shifting to angle control signal
when being more than or equal to zero, then utilizing boundary condition (a) as shown in formula (1), obtain control signal d
1.
When shifting to angle control signal
when being less than zero, then utilizing boundary condition (b) as shown in formula (2), obtain control signal d
2.
Wherein V
1, V
2be respectively the primary side of converter and the active bridge direct voltage of secondary side, n is the no-load voltage ratio 1:n of transformer primary side to secondary side.
Step 3.2, provide controlled condition as shown in formula (3).
nV
1d
1＝V
2d
2(3)
When shifting to angle control signal
when being more than or equal to zero, according to the control signal d that step 3.1 obtains
1value, utilize formula (3) to solve d
2; When shifting to angle control signal
when being less than zero, according to the control signal d that step 3.1 obtains
2value, utilize formula (3) to solve d
1;
Step 4, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2produce the drive singal of switching tube, thus control the primary side voltage v of converter
aBwith Circuit Fault on Secondary Transformer voltage v
cDand transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle Φ, make transformer current be in critical continuous mode state, the reactive loss of circuit is reduced, the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
Control method described in the present embodiment and the circuit topology course of work as follows:
After converter starts to work on power, for V
2the adjuster of voltage, when secondary side voltage is lower than the given V of voltage
reftime, the power of converter is by V
1side is passed to V
2side.Digitial controller (DSPTMS320F28335) is by sensor sample V
2the direct voltage of side is as feedback.By V
ref-V
2value through digital PID calculate method and amplitude limiter, the value of output
as shifting to control signal between two active bridges, this numerical value shifting to control signal on the occasion of.Obtain exporting controlling value
afterwards, boundary condition (a) is utilized to calculate V
2shift to control signal between two brachium pontis of the active bridge in side, be designated as d
1.Boundary condition (a) can be expressed as:
n is the no-load voltage ratio (1:n) of transformer primary side to secondary side.Calculate d
1afterwards, relational expression: nV is recycled
1d
1=V
2d
2, can V be calculated
1control signal d is shifted between two brachium pontis of the active bridge in side
2.Boundary condition (a) in this kind of control method can ensure transformer current critical continuous mode, and (waveform is as the i in Fig. 3
pand i
sshown in), when Same Efficieney, peak value and the effective value of electric current are less, reduce loss, raise the efficiency.
When secondary side voltage is higher than the given V of voltage
reftime, the power of converter is by V
2side is passed to V
1side.Digitial controller (DSPTMS320F28335) is by sensor sample V
2the direct voltage of side is as feedback.By V
ref-V
2value through digital PID calculate method and amplitude limiter, the value of output
as shifting to control signal between two active bridges.Now, the numerical value shifting to control signal is negative value.Obtain exporting controlling value
afterwards, boundary condition (b) is utilized to calculate V
1shift to control signal between two brachium pontis of the active bridge in side, be designated as d
2.Wherein, boundary condition (b) can be expressed as:
n is the no-load voltage ratio (1:n) of transformer primary side to secondary side.Calculate d
2afterwards, relational expression: nV is recycled
1d
1=V
2d
2, can V be calculated
2control signal d is shifted between two brachium pontis of the active bridge in side
1.Boundary condition (a) in this kind of control method can ensure transformer current critical continuous mode, and when Same Efficieney, peak value and the effective value of electric current are less, reduces loss, raises the efficiency.
Generation unit is driven to be obtained by preceding method
d
1and d
2three control variables produce corresponding drive singal, comprise S
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8.The sequential chart of drive singal and interlock circuit waveform are as shown in Figure 3.Eight drive singal being described as in sequential: all drive singal are all the square-wave signals of 50%; S
1with S
2complementary, S
3with S
4complementary, S
5with S
6complementary, S
7with S
8complementary; S
1advanced S
3time by d
1control, S
5advanced S
7time by d
2control, S
1and S
5between phase difference by
control.
Utilize
d
1and d
2control eight drive singal, the transformer first side winding voltage v of converter can be controlled
ab, secondary side winding voltage v
cd, and v
abwith v
cdphase difference.Realize controlling the power of converter.When power output needs to increase, V
2the output of side DC terminal voltage controller
can increase, thus increase v
abwith v
cdbetween phase shifting angle, improve power output; When power output reduces, V
2the output of side DC terminal voltage controller
can reduce, thus reduce v
abwith v
cdbetween phase shifting angle, reduce power output.Only by a controller, just can realize the multivariable Control of power, simplify design process.In addition, this control method can ensure that Transformer Winding electric current remains critical continuous mode under different loads.Meanwhile, converter does not all have reactive loss under any load.
Above-described specific descriptions; the object of inventing, technical scheme and beneficial effect are further elaborated; be understood that; the foregoing is only specific embodiments of the invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a bidirectional DC-DC converter electric current critical continuous mode unified control method, is characterized in that: by the given v of the output voltage by secondary side
refwith the output voltage sampled value V of actual secondary side
2difference as the input of voltage controller, the output of controller is for regulating transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle control signal
according to shifting to angle control signal
boundary condition and transformer primary side voltage v
aBwith control transformer secondary side voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2; Transformer current can be made to be in the pattern of critical continuous mode by described boundary condition and controlled condition; According to shifting to angle control signal
control signal d
1with control signal d
2, drive generation unit to produce corresponding switching tube drive control signal, thus the primary side voltage v of control transformer
aBwith Circuit Fault on Secondary Transformer voltage v
cDand transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle Φ; Described boundary condition and controlled condition can make transformer current be in the pattern of critical continuous mode, and the reactive loss of circuit is reduced, and the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
2. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 1, it is characterized in that: described controller can realize the control to described bidirectional DC-DC converter by means of only a voltage controller, can reduce the complexity of control unit; Described voltage controller preferred proportion integral PI controller.
3. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 1 and 2, is characterized in that: described boundary condition is according to shifting to angle control signal
large I is divided into boundary condition (a) and boundary condition (b) two kinds;
When shifting to angle control signal
when being more than or equal to zero, then utilize boundary condition (a) as shown in formula (1),
When shifting to angle control signal
when being less than zero, then utilize boundary condition (b) as shown in formula (2),
Wherein V
1, V
2be respectively the active bridge direct voltage sampled value of primary side to converter and secondary side; N is the no-load voltage ratio 1:n of transformer primary side to secondary side.
4. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 3, is characterized in that: described controlled condition is as shown in formula (3).
nV
1d
1＝V
2d
2(3)
5. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 4, it is characterized in that: described converter is two-way topological structure, primary side and secondary side can exchange.
6. a bidirectional DC-DC converter electric current critical continuous mode unified control method, is characterized in that: comprise the steps,
Step one, determine the given V of converter secondary side VD
ref;
Step 2, the primary side of converter and the active bridge direct voltage of secondary side to be sampled, be designated as V respectively
1and V
2; Calculate output voltage set-point V
refwith V
2difference, described difference is as the input of output voltage regulator; The output of described voltage regulator is as transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle control signal
Step 3, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2; Transformer current can be made to be in the pattern of critical continuous mode by described boundary condition and controlled condition;
Step 3.1, to provide for solving control signal d
1or control signal d
2boundary condition;
When shifting to angle control signal
when being more than or equal to zero, then utilizing boundary condition (a) as shown in formula (1), obtain control signal d
1;
When shifting to angle control signal
when being less than zero, then utilizing boundary condition (b) as shown in formula (2), obtain control signal d
2;
Wherein V
1, V
2be respectively the primary side of converter and the active bridge direct voltage sampled value of secondary side, n is the no-load voltage ratio 1:n of transformer primary side to secondary side;
Step 3.2, provide controlled condition as shown in formula (3);
nV
1d
1＝V
2d
2(3)
When shifting to angle control signal
when being more than or equal to zero, according to the control signal d that step 3.1 obtains
1value, utilize formula (3) to solve d
2; When shifting to angle control signal
when being less than zero, according to the control signal d that step 3.1 obtains
2value, utilize formula (3) to solve d
1;
Step 4, basis shift to angle control signal
boundary condition and transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween controlled condition can obtain for control transformer primary side voltage v
aBcontrol signal d
1with Circuit Fault on Secondary Transformer voltage v
cDcontrol signal d
2.Corresponding switching tube drive singal is produced by driver element, thus the primary side voltage v of control transformer
aBwith Circuit Fault on Secondary Transformer voltage v
cDand transformer primary side voltage v
aBwith Circuit Fault on Secondary Transformer voltage v
cDbetween shift to angle Φ, make transformer current be in the pattern of critical continuous mode, the reactive loss of circuit is reduced, the circulation loss of switching tube current stress and converter reduces, thus can improve efficiency and the reliability of converter.
7. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 6, is characterized in that: the drive singal of the generation switching tube described in step 4 is determined according to concrete bidirectional DC-DC converter topology.
8. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 6, it is characterized in that: the drive singal of the generation switching tube described in step 4, for conventional two-way two active bridge DC-DC converter, it comprises eight switching tube drive control signal, is designated as respectively: S
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8; The feature of eight described switching tube drive singal is: all drive singal are all the square-wave signals of 50%; S
1with S
2complementary, S
3with S
4complementary, S
5with S
6complementary, S
7with S
8complementary; S
1advanced S
3time by d
1control, S
5advanced S
7time by d
2control, S
1and S
5between phase difference by
control.
9. a kind of bidirectional DC-DC converter electric current critical continuous mode unified control method according to claim 6 or 7 or 8, it is characterized in that: described converter is two-way topological structure, primary side and secondary side can exchange.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092375A (en) * | 2014-07-17 | 2014-10-08 | 电子科技大学 | Two-stage series DC-DC converter |
| US20140334196A1 (en) * | 2013-05-10 | 2014-11-13 | National Taiwan University | Control device for multiphase interleaved dc-dc converter and control method thereof |
| US20150349649A1 (en) * | 2014-06-02 | 2015-12-03 | Utah State University | Zero voltage switching operation of a minimum current trajectory for a dc-to-dc converter |
| CN105162333A (en) * | 2015-10-09 | 2015-12-16 | 盐城工学院 | DAB-BDC modulation method based on high-frequency alternating-current buck-boost principle |
-
2015
- 2015-12-28 CN CN201511001369.5A patent/CN105553274B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140334196A1 (en) * | 2013-05-10 | 2014-11-13 | National Taiwan University | Control device for multiphase interleaved dc-dc converter and control method thereof |
| US20150349649A1 (en) * | 2014-06-02 | 2015-12-03 | Utah State University | Zero voltage switching operation of a minimum current trajectory for a dc-to-dc converter |
| CN104092375A (en) * | 2014-07-17 | 2014-10-08 | 电子科技大学 | Two-stage series DC-DC converter |
| CN105162333A (en) * | 2015-10-09 | 2015-12-16 | 盐城工学院 | DAB-BDC modulation method based on high-frequency alternating-current buck-boost principle |
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| CN106655785A (en) * | 2016-11-18 | 2017-05-10 | 北京理工大学 | Bidirectional hybrid bridge DC-DC converter and half-cycle volt-second area balance control method |
| CN106655785B (en) * | 2016-11-18 | 2019-04-02 | 北京理工大学 | Two-way mixing bridge DC-DC converter and half period volt-seconds area balance control method |
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| EP4358379A1 (en) * | 2022-10-21 | 2024-04-24 | Siemens Aktiengesellschaft | Method for operating a dual active bridge by means of an electronic computing device, computer program product, computer-readable storage medium, electronic computing device and dual active bridge |
| WO2024083373A1 (en) * | 2022-10-21 | 2024-04-25 | Siemens Aktiengesellschaft | Method for operating a dual active bridge by means of an electronic computing device, computer programme product, computer-readable storage medium, electronic computing device, and dual active bridge |
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