CN108288915A - A kind of integrated DC/DC converters of crisscross parallel magnetic - Google Patents
A kind of integrated DC/DC converters of crisscross parallel magnetic Download PDFInfo
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- CN108288915A CN108288915A CN201810343504.1A CN201810343504A CN108288915A CN 108288915 A CN108288915 A CN 108288915A CN 201810343504 A CN201810343504 A CN 201810343504A CN 108288915 A CN108288915 A CN 108288915A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application provides a kind of integrated DC/DC converters of crisscross parallel magnetic, including：Obtain in parallel and the identical first branch of structure, the second branch, third branch and the 4th branch；The BUCK capacitances Cbuck that first end is connected with the output end of the first branch, the second branch, third branch and the 4th branch, second end is grounded；The BUCK resistance Rbuck in parallel with the BUCK capacitances Cbuck；Every branch improves the output stability of converter including a main switch, auxiliary switch pipe and inductance by the way that PID controller is arranged between the second end and major and minor switching tube of the BUCK capacitances Cbuck.
Description
Technical field
The present invention relates to electronic circuit technology fields, and in particular to a kind of integrated DC/DC converters of crisscross parallel magnetic.
Background technology
DC/DC converters are widely used in the circuit of electric substation automation system, it is switching power source chip, refer to utilization
The characteristic of the energy storage of capacitance, inductance is carried out the action of HF switch by controllable switch, the electric energy of input is stored in capacitance
(sense) is inner, and when the switches are opened, electric energy is released to load again, provides energy.The ability and duty of its power exported or voltage
It is more related than (by the ratio of switch conduction times and the period entirely switched).Switching Power Supply can be used for boosting and be depressured.Switch
Power supply has many advantages, such as high efficiency, high power density and high reliability, split powered-down however as the fast development of Switching Power Supply
The output voltage required precision in source and dynamic property are gradually increased.
How to improve the precision of switch power source output voltage becomes those skilled in the art's technical problem urgently to be resolved hurrily
One of.
Invention content
In view of this, the embodiment of the present invention provides a kind of integrated DC/DC converters of crisscross parallel magnetic, to improve crisscross parallel
Magnetic integrates the precision of DC/DC converter output signals.
To achieve the above object, the embodiment of the present invention provides the following technical solutions：
A kind of integrated DC/DC converters of crisscross parallel magnetic, including：
In parallel and the identical first branch of structure, the second branch, third branch and the 4th branch；
First end is connected with the output end of the first branch, the second branch, third branch and the 4th branch, second terminates
The BUCK capacitances Cbuck on ground；
The BUCK resistance Rbuck in parallel with the BUCK capacitances Cbuck；
Wherein, the first branch includes：First main switch Q1, the first auxiliary switch pipe Q1-1 and the first inductance L1；Institute
Stating the second branch includes：Second main switch Q2, the second auxiliary switch pipe Q2-1 and the second inductance L2；The third branch includes：
Third main switch Q3, third auxiliary switch pipe Q3-1 and third inductance L3；4th branch includes：4th main switch Q4,
Fourth officer switching tube Q4-1 and the 4th inductance L4；
The first end of the first main switch Q1 and the second main switch Q2, third main switch Q3 and the 4th
The first end of main switch Q4 is connected, the first end of the first auxiliary switch pipe Q1-1 and the second of the first main switch Q1
End is connected with the first end of the first inductance L1, the second end ground connection of the first auxiliary switch pipe Q1-1, the first inductance L1's
Second end is connected with the second end of the second inductance L2, third inductance L3 and the 4th inductance L4；
The second end and the second inductance L2 of the first end of the second auxiliary switch pipe Q2-1 and the second main switch Q2
First end be connected, the second end of the second auxiliary switch pipe Q2-1 ground connection；
The second end and third inductance L3 of the first end of the third auxiliary switch pipe Q3-1 and the third main switch Q3
First end be connected, the second end of third auxiliary switch pipe Q3-1 ground connection；
The second end and the 4th inductance L4 of the first end and the 4th main switch Q4 of the fourth officer switching tube Q4-1
First end be connected, the second end of fourth officer switching tube Q4-1 ground connection.
The PID controller that input terminal is connected with the second end of the BUCK capacitances Cbuck；
The output end of the PID controller and the first main switch Q1, the second main switch Q2, third main switch
The control of Q3, the 4th main switch Q4, the first auxiliary switch pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube
End is connected.
Preferably, Sohu of Soviet Union crisscross parallel magnetic integrates DC/DC converters, further includes,
With first main switch, the second main switch, third main switch, the 4th main switch, the first auxiliary switch
The connected controller of the control terminal of pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube, is used for：Control first
Main switch, the second main switch, third main switch, the 4th main switch, the first auxiliary switch pipe, the second auxiliary switch pipe,
The conducting state of three auxiliary switch pipes and fourth officer switching tube mutually switches between eight mode；
Specifically, in I mode, the first main switch conducting is controlled, other switching tubes disconnect；
In Section II, IV, VI, VIII mode, the first main switch, the second main switch, third main switch and the 4th master
Switching tube disconnects, the conducting of other switching tubes；
In Section III mode, the second master switch conducting, other switching tubes disconnect；
In V mode, the third master switch conducting, other switching tubes disconnect；
In VII mode, the 4th master switch conducting, other switching tubes disconnect.
Preferably, the crisscross parallel magnetic integrates DC/DC converters, first inductance, the second inductance, third inductance and
The specification of 4th inductance is identical.
Preferably, the crisscross parallel magnetic integrates DC/DC converters, further includes：
The reference signal generator being connected with the PID controller, for exporting adjustable benchmark to the PID controller
Voltage.
Preferably, crisscross parallel magnetic integrates in DC/DC converters, further includes：
With first main switch, the second main switch, third main switch, the 4th main switch, the first auxiliary switch
The diode of pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube reverse parallel connection.
Based on the above-mentioned technical proposal, said program provided in an embodiment of the present invention, by the BUCK capacitances Cbuck
Second end and major and minor switching tube between PID controller is set, by the PID controller to the output of the converter into
Row is adjusted so that the output of variator is maintained at predetermined target value, improves the output stability of converter.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the topological structure schematic diagram of Buck pattern downconverters；
Fig. 2 a are the phase inductance electric current and operation mode that duty ratio is 0~1/4；
Fig. 2 b are the phase inductance electric current and operation mode that duty ratio is 1/4~1/2；
Fig. 3 a are the phase inductance electric current and operation mode that duty ratio is 1/2~3/4；
Fig. 3 b be duty ratio be 3/4~phase inductance electric current and operation mode；
Fig. 4 is that four staggered magnetic in parallel integrate Buck converter small signal equivalent models；
Fig. 5 is the double circle structure block diagram of system；
Fig. 6 is system entirety Controlling model；
Fig. 7 is that Buck mode output voltage is schemed to duty ratio transmission function bode；
Fig. 8 is the schematic diagram that crisscross parallel magnetic integrates DC/DC converters disclosed in the embodiment of the present application；
Fig. 9 is that the structure of the integrated DC/DC converter output-controlling devices of crisscross parallel magnetic disclosed in the embodiment of the present application is shown
It is intended to.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Applicant using crisscross parallel integrated magnetic by the study found that can be such that current ripples are reduced, simultaneously
The size of magnetic part can be made, which to greatly reduce, make the stable state of automated system and dynamic characteristic, to be improved.
The output of Switching Power Supply depends primarily on the output of DC-DC, and the application is with four phase magnetic integrated bi-directional DC/DC Buck
Converter research object, it is proposed that system Approach for Modeling of Small-Signal in ccm mode has obtained system transter, passed through
The amplitude-frequency and phase-frequency characteristic for analyzing the biography letter, obtain corner frequency and phase margin.When to meet DC/DC converter steady operations
It is general to require, and PI controls are added, to adjust the output response of converter, and then stable state accuracy is improved, while utilizing neat lattice
Le-Mike Nichols (ZN methods), finds out KPWith the value of Ki, the control of design system is optimized, the stability of system and dynamic is made to ring
It should be improved.Finally, four phasing commutators are emulated and is tested, the results showed that proposed method can make converter
It can be improved.
Referring to Fig. 1, the structure of crisscross parallel magnetic integrated bi-directional DC/DC transformation Buck is four-way disclosed in the embodiment of the present application
Road parallel connection magnetic integrated converter, structure may include：
In parallel and the identical first branch of structure, the second branch, third branch and the 4th branch；
First end is connected with the output end of the first branch, the second branch, third branch and the 4th branch, second terminates
The BUCK capacitances Cbuck on ground；
The BUCK resistance Rbuck in parallel with the BUCK capacitances Cbuck；
Wherein, the first branch includes：First main switch Q1, the first auxiliary switch pipe Q1-1 and the first inductance L1；Institute
Stating the second branch includes：Second main switch Q2, the second auxiliary switch pipe Q2-1 and the second inductance L2；The third branch includes：
Third main switch Q3, third auxiliary switch pipe Q3-1 and third inductance L3；4th branch includes：4th main switch Q4,
Fourth officer switching tube Q4-1 and the 4th inductance L4；
The first end of the first main switch Q1 and the second main switch Q2, third main switch Q3 and the 4th
The first end of main switch Q4 is connected, the first end of the first auxiliary switch pipe Q1-1 and the second of the first main switch Q1
End is connected with the first end of the first inductance L1, the second end ground connection of the first auxiliary switch pipe Q1-1, the first inductance L1's
Second end is connected with the second end of the second inductance L2, third inductance L3 and the 4th inductance L4；
The second end and the second inductance L2 of the first end of the second auxiliary switch pipe Q2-1 and the second main switch Q2
First end be connected, the second end of the second auxiliary switch pipe Q2-1 ground connection；
The second end and third inductance L3 of the first end of the third auxiliary switch pipe Q3-1 and the third main switch Q3
First end be connected, the second end of third auxiliary switch pipe Q3-1 ground connection；
The second end and the 4th inductance L4 of the first end and the 4th main switch Q4 of the fourth officer switching tube Q4-1
First end be connected, the second end of fourth officer switching tube Q4-1 ground connection.
By being rationally arranged to the first main switch Q1, the first auxiliary switch pipe Q1-1, the second main switch Q2, second
Auxiliary switch pipe Q2-1, third main switch Q3, third auxiliary switch pipe Q3-1, the 4th main switch Q4 and fourth officer switching tube Q4-1
The pwm pulse of application controls signal, and four-way parallel connection magnetic integrated converter shown in FIG. 1 can be made in buck patterns, and one
There are eight mode in a work period.
The input voltage of four-way parallel connection magnetic integrated converter and output voltage are respectively Vin and Vout, input in Fig. 1
Electric current and output current are respectively iin (t) and iout (t), and iLi (t) is the i-th inductive current, total output current of four phase inductances
For iL (t), the first phase refers to that the first branch, the second phase refer to second in technical solution disclosed in the embodiment of the present application
Road, third phase refer to that third branch, the 4th phase refer to the 4th branch, and the first inductance to the 4th inductance is coupling, and two
Mutually reverse coupled each other, the self-induction of inductance and mutual inductance are respectively L and M, and magnetic coupling coefficient is k=M/L [1].The inductance of converter
Voltage equation is as follows:
Converter uses four symmetrical, the identical coupling inductances of specification, therefore the inductive current per phase is only phase
Poor Tswith/4 phases, complementary characteristic all same, therefore only duty ratio D is analyzed in 0~1 range herein, the first electricity
The ripple of the inductive current of sense and four phase total inductance current ripples, while also output voltage ripple is analyzed.
[four-way parallel connection magnetic integrated converter operation mode is as shown in Figure 2 a when 0,1/4) by duty ratio D ∈
1., converter is in mode I in the T0-t1 periods, there was only the first main switch Q1 conductings under this mode,
And vL1=va, vL2=vL3=vL4=vb, being substituted into formula (1) can obtain
3., converter is in converter in mode III, the T4-t5 period and is in mode V, T6-t7 in the T2-t3 periods
Converter is in mode VII in period；In the case that these three, switching tube Q1 is off, and each situation only has the master of a phase
Switching tube is in the state opened.At this point, the inductive current change rate all same of the first phase, vLi=va, i=2~4, vLm=
Vb, m ≠ i, simultaneous solution obtain
Simultaneous above formula, the ripple for acquiring the first phase inductance electric current are
Wherein switching frequency f=1/Tswitch
Total output current ripple of corresponding four phase inductance is at this time
When duty ratio D ∈ [1/4,1/2) when, the operation mode of converter is as shown in Figure 2 b, and first can be obtained by Fig. 2 b
The current ripples of the inductance of phase are：
Total output current ripple of corresponding four phase inductance is at this time：
(3) when duty ratio D ∈ [1/2,3/4) when, as shown in Figure 3a, it can be deduced that the current ripples of the inductance of the first phase
For：
And total output current ripple of corresponding inductance is at this time
(4) when duty ratio D ∈ [3/4,1) when, the operation mode of converter, as shown in Figure 3b
It can show that the current ripples of the inductance of the first phase are：
And total output current ripple of corresponding inductance is at this time：
It is usually for single-phase voltage ripple：
The ripple expression formula of four phase total inductance electric currents is substituted into, so that it may be become with showing that four staggered magnetic in parallel integrate Buck
The output voltage ripple of parallel operation is：
Multiphase interleaving also has output voltage ripple certain inhibiting effect it can be seen from formula (13).
In technical solution disclosed in the above embodiments of the present application, each switching tube can meal be in parallel a diode, it is above-mentioned
Four-way parallel connection magnetic integrated converter provides energy to load after pressure reduction, realizes the release of energy, main switch successively according to
Duty ratio is connected, and auxiliary switch pipe shutdown, diode realizes afterflow effect.Converter is carried out using method of perturbation and state space method
Small-signal modeling.
Wherein, the state equation of each branch is：
In a switch periods, high and low side voltage changes in very a small range
Above formula (14) is averaged according to formula in a switch periods, according to the average concept formula of switch periods
(15), shown in the switch periods average value such as formula (16) of switching network output variable：
Following average value equation can be released
Wherein<VLi-M(t)>T is the average value of each phase inductance voltage,<VM(t)>T is the average value of coupled voltages,<iC
(t)>T is the average value of capacitance current,<iLi(t)>T is the average value of each phase inductance electric current.
The dynamic model that converter can be obtained in conjunction with method of perturbation disturbs to output voltage vo, input electricity above formula
Vin, duty ratio di are pressed, per phase inductance electric current iLi, small sample perturbations are done near dc point, obtains formula (17), wherein Vin,
Di, V0 and IL are vin, di, v0, the average value of iL.
When circuit is operated in a certain quiescent point, it is as follows to obtain non-linear ac small signal state equation：
When Buck converters reach stable state, is balanced, can be obtained according to the voltage-second balance principle and capacitance charge of inductive drop
Input voltage, input current, the steady state relation of the total output current of four phase inductances are as follows：
Ignore second order exchange item, non-linear controlled source is detached and is disturbed, obtains the small letter of the Buck converters after decoupling
Number equivalent [3].As shown in Figure 4.
It can be obtained according to Fig. 4, the equation of inductive current, capacitance voltage and input current is：
Therefore the transmission function of input voltage vin (t) to output voltage v0 (t) is：
The transmission function of duty ratio d (t) to output voltage vo (t) is：
In order to ensure that the stabilization of converter output voltage and output current, the application utilize the double-closed-loop control of autonomous equalizing current
Scheme (see Fig. 5) improves the reaction speed of system, Controlling model by electric current loop by the output voltage of Voltage loop control system
As shown in Figure 6.
Applicant has obtained Bode figures by Matlab.Fig. 7 is the Bode diagram of Vo to d.And in actual operation, for
Requirement when DC/DC converters work is that the nargin of 1/5~1/4 and system that fn ranges are generally fs is not less than 45 °.
It is preceding with after compensation that compensation is marked in Fig. 7, we obtain before being compensated from figure, and the corner frequency of system is
2.48*105rad/s。
The fs designed herein is 100KHz.Wm=2 π fs=2*3.14*1*105=6.28*105rad/s, cross-over frequency
Between 1.26*105~1.57*105rad/s.It is imitative to system when not accessing PID controller according to above-mentioned transmission function
Very, it is seen that system performance when not adjusting is to be improved, need to design PID controller and be adjusted.
Ratio control gain K is calculated by using Ziegler-Nichols methods in the applicationPWith integration time constant Ti
Value.Ziegler-Nichols Tunings are the second-order model for needing to establish the relatively good reaction object frequency characteristic of an energy, root
According to the model, it can derive formula in conjunction with given performance indicator, be subsequently used for adjusting for pid parameter.
Stability limit is determined by P elements, this limit is reached when there is stable state concussion.Generate critical proportionality range Kpcrit
With critical concussion cycle T crit, other parameters are calculated further according to the formula of table 1, table 1 is Ziegler-Nichols Tunings
Table；
1 Ziegler-Nichols method tables of table
| Control law | KP | Ti | TD |
| PID | 0.6Kpcrit | 0.5Tcrit | 0.125Tcrit |
| PI | 0.45Kpcrit | 0.85Tcrit | |
| P | 0.5Kpcrit |
Above-mentioned Ziegler-Nichols methods use step response in systems, while analyzing output response, obtain as follows
Performance indicator Kpcrit=1, Tcrit=0.2, substitute into table 1, can calculate PI control when KP=0.6, Ti=0.1.The two
Value substitutes into PID control and is emulated, and obtains the biography letter of PI controls.
In Fig. 7, PI is system balance curve, and the curve after compensating be as shown, scheming us by Bode can obtain,
Corner frequency after correction is 1.55*105rad/s, and phase margin is 67.6 °, meets the requirement of converter output stability.
In this regard, referring to Fig. 8, method disclosed in the above embodiments of the present application may be summarized to be：
Step S101：Crisscross parallel magnetic is obtained to integrate DC/DC converters output signal and obtain reference signal；
Step S102：Judge whether the stable state concussion of the integrated DC/DC converters of crisscross parallel magnetic reaches preset limiting value,
If so, executing step S103；
Step S103：Generate critical proportionality range Kpcrit and critical concussion cycle T crit；
Step S104：Based on the critical proportionality range Kpcrit and critical concussion cycle T crit according to preset mapping table
The parameter in PID controller is calculated：Ratio controls gain KPWith integration time constant Ti；
Step S105：According to the KPThe control transmission function of the PID controller is determined with Ti；
Step S106：The PID controller integrates DC/DC converters output signal and described according to the crisscross parallel magnetic
The comparison result of reference signal integrates the crisscross parallel magnetic using the control transmission function each in DC/DC converters
The output signal of a branch is adjusted.
In one preferred embodiment of the application, in the preset mapping table, KP=0.6Kpcrit, Ti=
0.5Tcrit。
Further, the control transmission function is：
Wherein, Ki=1/Ti, one in the behalf Laplace transform are multiple
Variable.
In addition, referring to Fig. 1, in view of this, crisscross parallel magnetic disclosed in the embodiment of the present application integrates in DC/DC converters
It is additionally provided with the IPD controllers U1 adjusted for realizing closed loop, the output end of the PID controller U1 is opened with first master
Close pipe Q1, the second main switch Q2, third main switch Q3, the 4th main switch Q4, the first auxiliary switch pipe, the second auxiliary switch
The control terminal of pipe, third auxiliary switch pipe and fourth officer switching tube is connected, the second end phase of input terminal and the BUCK capacitances Cbuck
Even.
The switching of the operation mode of above-mentioned converter can be controlled by controller, and the controller is opened with first master
Guan Guan, the second main switch, third main switch, the 4th main switch, the first auxiliary switch pipe, the second auxiliary switch pipe, third pair
The control terminal of switching tube and fourth officer switching tube is connected, and is used for：Control the first main switch, the second main switch, third master open
The conducting of Guan Guan, the 4th main switch, the first auxiliary switch pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube
State mutually switches between previously described eight mode.
The converter can also include：The reference signal generator being connected with the PID controller is used for described
PID controller exports adjustable reference voltage.With first main switch, the second main switch, third main switch, the 4th
Two poles of main switch, the first auxiliary switch pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube reverse parallel connection
Pipe, these diodes are for providing afterflow.
Wherein, the PID controller may include：
Signal acquisition list 100 is believed for obtaining crisscross parallel magnetic and integrating DC/DC converters output signal and obtain benchmark
Number；
Closed-loop parameters generation unit 200, for judging whether the stable state concussion of the integrated DC/DC converters of crisscross parallel magnetic reaches
To preset limiting value, if so, generating corresponding critical proportionality range Kpcrit and critical concussion cycle T crit；
PID adjusts unit 300, for pre- based on the critical proportionality range Kpcrit and critical concussion cycle T crit foundations
If mapping table the parameter in PID controller is calculated：KPAnd Ti；According to the KPThe control of the PID controller is determined with Ti
Modulation trnasfer function；The comparison result of DC/DC converters output signal and the reference signal is integrated according to the crisscross parallel magnetic,
The output signal for being integrated each branch in DC/DC converters to the crisscross parallel magnetic using the control transmission function is carried out
It adjusts.
For convenience of description, it is divided into various modules when description system above with function to describe respectively.Certainly, implementing this
The function of each module is realized can in the same or multiple software and or hardware when application.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.System and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates may or may not be physically separated, the component shown as unit can be or
Person may not be physical unit, you can be located at a place, or may be distributed over multiple network units.It can root
According to actual need that some or all of module therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, depends on the specific application and design constraint of technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (5)
1. a kind of crisscross parallel magnetic integrates DC/DC converters, which is characterized in that including：
In parallel and the identical first branch of structure, the second branch, third branch and the 4th branch；
First end is connected with the output end of the first branch, the second branch, third branch and the 4th branch, second end is grounded
BUCK capacitances Cbuck；
The BUCK resistance Rbuck in parallel with the BUCK capacitances Cbuck；
Wherein, the first branch includes：First main switch Q1, the first auxiliary switch pipe Q1-1 and the first inductance L1；Described
Two branches include：Second main switch Q2, the second auxiliary switch pipe Q2-1 and the second inductance L2；The third branch includes：Third
Main switch Q3, third auxiliary switch pipe Q3-1 and third inductance L3；4th branch includes：4th main switch Q4, the 4th
Auxiliary switch pipe Q4-1 and the 4th inductance L4；
The first end of the first main switch Q1 and the second main switch Q2, third main switch Q3 and the 4th main switch
The first end of pipe Q4 is connected, the second end of the first end of the first auxiliary switch pipe Q1-1 and the first main switch Q1 and the
The first end of one inductance L1 is connected, the second end ground connection of the first auxiliary switch pipe Q1-1, the second end of the first inductance L1
It is connected with the second end of the second inductance L2, third inductance L3 and the 4th inductance L4；
The of the second end of the first end of the second auxiliary switch pipe Q2-1 and the second main switch Q2 and the second inductance L2
One end is connected, the second end ground connection of the second auxiliary switch pipe Q2-1；
The of the second end of the first end of the third auxiliary switch pipe Q3-1 and the third main switch Q3 and third inductance L3
One end is connected, the second end ground connection of the third auxiliary switch pipe Q3-1；
The of the second end of the first end of the fourth officer switching tube Q4-1 and the 4th main switch Q4 and the 4th inductance L4
One end is connected, the second end ground connection of the fourth officer switching tube Q4-1；
The PID controller that input terminal is connected with the second end of the BUCK capacitances Cbuck；
The output end of the PID controller and the first main switch Q1, the second main switch Q2, third main switch Q3,
The control terminal phase of 4th main switch Q4, the first auxiliary switch pipe, the second auxiliary switch pipe, third auxiliary switch pipe and fourth officer switching tube
Even.
2. crisscross parallel magnetic according to claim 1 integrates DC/DC converters, which is characterized in that further include：
With first main switch, the second main switch, third main switch, the 4th main switch, the first auxiliary switch pipe,
The connected controller of the control terminal of second mate's switching tube, third auxiliary switch pipe and fourth officer switching tube, is used for：Control the first main switch
Pipe, the second main switch, third main switch, the 4th main switch, the first auxiliary switch pipe, the second auxiliary switch pipe, third pair are opened
The conducting state for closing pipe and fourth officer switching tube mutually switches between eight mode；
Specifically, in I mode, the first main switch conducting is controlled, other switching tubes disconnect；
In Section II, IV, VI, VIII mode, the first main switch, the second main switch, third main switch and the 4th main switch
Pipe disconnects, the conducting of other switching tubes；
In Section III mode, the second master switch conducting, other switching tubes disconnect；
In V mode, the third master switch conducting, other switching tubes disconnect；
In VII mode, the 4th master switch conducting, other switching tubes disconnect.
3. crisscross parallel magnetic according to claim 1 integrates DC/DC converters, which is characterized in that
First inductance, the second inductance, the specification of third inductance and the 4th inductance are identical.
4. crisscross parallel magnetic according to claim 1 integrates DC/DC converters, which is characterized in that further include：
The reference signal generator being connected with the PID controller, for exporting adjustable benchmark electricity to the PID controller
Pressure.
5. crisscross parallel magnetic according to claim 1 integrates DC/DC converters, which is characterized in that further include：
With first main switch, the second main switch, third main switch, the 4th main switch, the first auxiliary switch pipe,
The diode of second mate's switching tube, third auxiliary switch pipe and fourth officer switching tube reverse parallel connection.
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| CN109120152A (en) * | 2018-08-07 | 2019-01-01 | 张锐明 | A kind of fuel cell low ripple efficient energy control device and method |
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| CN113098291B (en) * | 2021-05-20 | 2022-05-20 | 江西清华泰豪三波电机有限公司 | DC/DC interleaved converter |
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Application publication date: 20180717 |