CN104935176A - A normalization phase shift control method applied to a full-bridge isolation bidirectional DC-DC converter - Google Patents
A normalization phase shift control method applied to a full-bridge isolation bidirectional DC-DC converter Download PDFInfo
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- CN104935176A CN104935176A CN201510391177.3A CN201510391177A CN104935176A CN 104935176 A CN104935176 A CN 104935176A CN 201510391177 A CN201510391177 A CN 201510391177A CN 104935176 A CN104935176 A CN 104935176A
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Abstract
The invention discloses a normalization phase shift control method applied to a full-bridge isolation bidirectional DC-DC converter. The duty ratio of pulse control signals of eight switch tubes of the full-bridge isolation bidirectional DC-DC converter is arranged to be 50%. Control signals of switch tubes of bridge arms are arranged to be mutually opposite. The control signal of the tube of the first bridge arm of an inlet side full bridge topology is used as a reference. An output voltage and a transmission power of the converter are adjusted by means of adjusting three phase shift controlled variables. According to the invention, an existing phase shift control method can be effectively normalized; the phase shift control method of the invention can be equivalent to other phase shift control methods through adjusting of relations between a D1, a D2 and a D3. The normalization phase shift control method has highest flexibility and compatibility. The phase shift control method selection and design difficulty are lowered.
Description
Technical field
The invention belongs to and belong to power electronics control technology field, especially full-bridge isolates Control System Design and the manufacture of bidirectional DC-DC converter (comprising half-bridge three-level, full-bridge isolation bidirectional DC-DC converter).
Background technology
In recent years, along with expanding economy and environmental problem highlight, obtaining of new forms of energy Semiconductor Converting Technology develops rapidly, special in direct-current micro-grid, distributed generation system, in electric automobile industry and region uninterruptible power system, in order to solve poower flow balance, the problems such as energy stores flexibly, full-bridge isolation bidirectional DC-DC converter because of its have that electrical isolation, power density are high, energy energy two-way flow and module-cascade is easy etc. that advantage is widely applied.
In the application of full-bridge isolation bidirectional DC-DC converter, Phaseshift controlling is the control method of very typical apply, and traditional Phaseshift controlling can complete the two-way flow of power, and control algolithm is simple.But adopt traditional Phaseshift controlling, converter can exist that excessive, the switch stress of backflow power is large, current stress is comparatively large and the shortcoming such as system effectiveness is low.For optimizing the control performance of full-bridge isolation bidirectional DC-DC converter, Chinese scholars proposes various new Method of Phase-Shift Controlling, comprising expansion Method of Phase-Shift Controlling, dual Method of Phase-Shift Controlling and triple Method of Phase-Shift Controlling.
But, these numerous Method of Phase-Shift Controllings, due to control aspect restrictive condition and limitation, the control performance of a more difficult acquisition global optimization, therefore, in order to make full use of topological structure and the feature of full-bridge isolation bidirectional DC-DC converter, complete this variator complex optimal controlled strategy performance, higher, a compatible stronger Method of Phase-Shift Controlling of flexibility ratio becomes exigence.
Summary of the invention
In view of the above shortcoming of prior art, for solving above-mentioned technical problem, the object of the invention is to propose a kind of normalization Method of Phase-Shift Controlling being applied to full-bridge isolation bidirectional DC-DC converter, by regulating Phaseshift controlling amount D
1, D
2with D
3relation be equivalent to other Method of Phase-Shift Controlling, essence overcomes the above shortcoming of prior art.
The present invention realizes its goal of the invention and realizes as follows:
(1) full-bridge is isolated the control signal (S of eight switching tubes of bidirectional DC-DC converter
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8) duty ratio be all set to 50%;
(2) control signal arranging same brachium pontis is reciprocal, i.e. input side full-bridge topology first switching tube (S
1) control signal and input side full-bridge topology second switching tube (S
2) control signal reciprocal, input side full-bridge topology the 3rd switching tube (S
3) control signal and input side full-bridge topology the 4th switching tube (S
4) control signal reciprocal, the control signal (S of outlet side full-bridge topology first switching tube
5) and outlet side full-bridge topology second switching tube (S
6) control signal reciprocal, outlet side full-bridge topology the 3rd switching tube (S
7) control signal and outlet side full-bridge topology the 4th switching tube (S
8) control signal reciprocal;
(3) input side full-bridge topology first switching tube (S is set
1) control signal and input side full-bridge topology the 3rd switching tube (S
3) the Phaseshift controlling amount of control signal be D
1, input side full-bridge topology first switching tube (S is set
1) control signal and outlet side full-bridge topology first brachium pontis on manage (S
5) the Phaseshift controlling amount of control signal be D
2, input side full-bridge topology first switching tube (S is set
1) control signal and the lower pipe (S of outlet side full-bridge topology second brachium pontis
7) the Phaseshift controlling amount of control signal be D
3;
(4) by regulating Phaseshift controlling amount D
1, D
2and D
3size complete the full-bridge isolation output voltage of bidirectional DC-DC converter and the control of power output, by regulating Phaseshift controlling amount D
1, D
2and D
3between relation be equivalent to other Method of Phase-Shift Controlling and complete Phaseshift controlling.
Adopt technique scheme, beneficial effect of the present invention is:
(1) pass through with same switching tube (S
1) control signal be reference signal, all states of phase shifting control can be obtained, there is the highest flexibility;
(2) by regulating Phaseshift controlling amount D
1, D
2and D
3relation, existing Method of Phase-Shift Controlling can be equivalent to, there is the highest compatibility, the effect of optimization of other Phaseshift controlling can be obtained.
Accompanying drawing explanation
Fig. 1 is the full-bridge isolation bidirectional DC-DC converter topological structure schematic diagram that the inventive method controls.
The waveform schematic diagram of Fig. 2 normalization Method of Phase-Shift Controlling.
The genetic map of the Method of Phase-Shift Controlling that Fig. 3 obtains according to normalization Phaseshift controlling.
Fig. 4 normalization Method of Phase-Shift Controlling is equivalent to other Method of Phase-Shift Controlling waveform schematic diagram.Wherein: figure (a) is triple Method of Phase-Shift Controlling (D
1≤ D
2≤ D
3≤ 1); Figure (b) is triple Method of Phase-Shift Controlling (D
2≤ D
1≤ D
3≤ 1); Figure (c) is dual Method of Phase-Shift Controlling (D
1≤ D
2≤ D
3≤ 1, D
3-D
2=D
1); Figure (d) is dual Method of Phase-Shift Controlling (D
2≤ D
1≤ D
3≤ 1, D
3-D
2=D
1); Figure (e) is expansion Method of Phase-Shift Controlling (D
1≤ D
2≤ D
3≤ 1, D
1=0); Figure (f) is expansion Phaseshift controlling (D
1≤ D
2≤ D
3≤ 1, D
3-D
2=0); Figure (g) is traditional Method of Phase-Shift Controlling.
Fig. 5 normalization Method of Phase-Shift Controlling is equivalent to other Method of Phase-Shift Controlling waveform experiment schematic diagram.Wherein: Fig. 4. (a) D
1=0.0346, D
2=0.0692, D
3=0.1729; Fig. 4. (b) D
1=0.1658, D
2=0.0829, D
3=0.3317; Fig. 4. (c) D
1=0.0508, D
2=0.1016, D
3=0.1524; Fig. 4. (d) D
1=0.2735, D
2=0.1368, D
3=0.4103; Fig. 4. (e) D
1=0, D
2=0.0676, D
3=0.1352; Fig. 4. (f) D
1=0.0676, D
2=0.1352, D
3=0.1352; Fig. 4. (g) D
1=0, D
2=0.1000, D
3=0.1000.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with technical scheme of the present invention and accompanying drawing.
The topological structure of full-bridge isolation bidirectional DC-DC converter of the present invention as shown in Figure 1.This converter forms primarily of two full-bridge converters, an auxiliary induction, two electric capacity, a high-frequency isolation transformer composition.Wherein, n is transformer voltage ratio; C
1, C
2be respectively mains side Support Capacitor and load-side Support Capacitor; U
infor mains side magnitude of voltage; L
rfor auxiliary electrical inductance value; U
o, i
obe respectively output current and load side voltage; U
ab, U
cdbe respectively transformer primary side H bridge input voltage and secondary output voltage values; R is converter equivalent load; Two full-bridge converters are made up of 8 switching tubes, and the driving pulse of switching tube is respectively S
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8.
Two Support Capacitor C in system example of the present invention
1and C
2be 2200 μ F, auxiliary induction L is 0.2mH, and the no-load voltage ratio n of transformer is 1, switch periods T
sfor 0.1ms, also can the parameter of design transformation device according to specific circumstances.
As shown in Figure 2, it contains three Phaseshift controlling amounts to the waveform schematic diagram of the normalization Method of Phase-Shift Controlling for full-bridge isolation bidirectional DC-DC converter of the present invention, by regulating Phaseshift controlling amount D
1, D
2and D
3relation can be equivalent to other Method of Phase-Shift Controllings.This control method comprises the following steps:
(1) full-bridge is isolated the control signal (S of eight switching tubes of bidirectional DC-DC converter
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8) duty ratio be all set to 50%;
(2) control signal arranging same brachium pontis is reciprocal, i.e. input side full-bridge topology first switching tube (S
1) control signal and input side full-bridge topology second switching tube (S
2) control signal reciprocal, input side full-bridge topology the 3rd switching tube (S
3) control signal and input side full-bridge topology the 4th switching tube (S
4) control signal reciprocal, the control signal (S of outlet side full-bridge topology first switching tube
5) and outlet side full-bridge topology second switching tube (S
6) control signal reciprocal, outlet side full-bridge topology the 3rd switching tube (S
7) control signal and outlet side full-bridge topology the 4th switching tube (S
8) control signal reciprocal;
(3) input side full-bridge topology first switching tube (S is set
1) control signal and input side full-bridge topology the 3rd switching tube (S
3) the Phaseshift controlling amount of control signal be D
1, input side full-bridge topology first switching tube (S is set
1) control signal and outlet side full-bridge topology first switching tube (S
5) the Phaseshift controlling amount of control signal be D
2, input side full-bridge topology first switching tube (S is set
1) control signal and outlet side full-bridge topology the 3rd switching tube (S
7) the Phaseshift controlling amount of control signal be D
3;
(4) Phaseshift controlling amount D is limited
1, D
2and D
3scope for be all greater than 0 degree, be less than or equal to 180 degree;
(5) D is set
1, D
2and D
3relation allow it be equivalent to other Method of Phase-Shift Controllings, as shown in Figure 4: work as D
1≤ D
2≤ D
3≤ 1 or D
2≤ D
1≤ D
3when≤1, normalization Method of Phase-Shift Controlling is equivalent to triple Method of Phase-Shift Controlling, respectively as Fig. 4. (a) and Fig. 4. shown in (b); Work as D
1≤ D
2≤ D
3≤ 1, D
3-D
2=D
1or D
2≤ D
1≤ D
3≤ 1, D
3-D
2=D
1time, normalization Method of Phase-Shift Controlling is equivalent to dual heavy Method of Phase-Shift Controlling, respectively as Fig. 4. (c) and Fig. 4. shown in (d); Work as D
1≤ D
2≤ D
3≤ 1, D
3-D
2=D
1or D
2≤ D
1≤ D
3≤ 1, D
3-D
2=D
1time, normalization Method of Phase-Shift Controlling is equivalent to dual Method of Phase-Shift Controlling, respectively as Fig. 4. (c) and Fig. 4. shown in (d); Work as D
1≤ D
2≤ D
3≤ 1, D
1=0 or D
1≤ D
2≤ D
3≤ 1, D
3=D
2time, normalization Method of Phase-Shift Controlling is equivalent to expansion Method of Phase-Shift Controlling, respectively as Fig. 4. (e) and Fig. 4. shown in (f); Work as D
1≤ D
2≤ D
3≤ 1, D
1=0, D
3=D
2time, normalization Method of Phase-Shift Controlling is equivalent to traditional Method of Phase-Shift Controlling, as Fig. 4. shown in (g);
(6) Fig. 5 is experimental result corresponding to Fig. 4 various Phaseshift controlling state.Wherein, Fig. 4. in (a), D
1=0.0346, D
2=0.0692, D
3=0.1729, normalization Method of Phase-Shift Controlling is equivalent to triple Method of Phase-Shift Controlling (D
1≤ D
2≤ D
3≤ 1); Fig. 4. in (b), D
1=0.1658, D
2=0.0829, D
3=0.3317, normalization Method of Phase-Shift Controlling is equivalent to triple Method of Phase-Shift Controlling (D
2≤ D
1≤ D
3≤ 1); Fig. 4. in (c), D
1=0.0508, D
2=0.1016, D
3=0.1524, normalization Method of Phase-Shift Controlling is equivalent to dual Method of Phase-Shift Controlling (D
1≤ D
2≤ D
3≤ 1); Fig. 4. in (d), D
1=0.2735, D
2=0.1368, D
3=0.4103, normalization Method of Phase-Shift Controlling is equivalent to triple Method of Phase-Shift Controlling (D
2≤ D
1≤ D
3≤ 1); Fig. 4. in (e), D
1=0, D
2=0.0676, D
3=0.1352, normalization Method of Phase-Shift Controlling is equivalent to expansion Method of Phase-Shift Controlling (D
1=0); Fig. 4. in (f), D
1=0.0676, D
2=0.1352, D
3=0.1352, normalization Method of Phase-Shift Controlling is equivalent to expansion Method of Phase-Shift Controlling (D
2=D
3); Fig. 4. in (g), D
1=0, D
2=0.1000, D
3=0.1000, normalization Method of Phase-Shift Controlling is equivalent to traditional Method of Phase-Shift Controlling.
When not departing from inventive concept, those skilled in the art are not when departing from scope and spirit of the present invention, and all apparent amendment about form and details carry out it or change all should drop in protection scope of the present invention.
Claims (2)
1. one kind is applied to the normalization Method of Phase-Shift Controlling of full-bridge isolation bidirectional DC-DC converter, for the unified existing Method of Phase-Shift Controlling for full-bridge isolation bidirectional DC-DC converter, reduce the difficulty that Method of Phase-Shift Controlling is chosen, to realize the optimal control of full-bridge isolation bidirectional DC-DC converter to greatest extent, comprise following process means:
(1) full-bridge is isolated the control signal (S of eight switching tubes of bidirectional DC-DC converter
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8) duty ratio be all set to 50%;
(2) control signal arranging same brachium pontis is reciprocal, i.e. input side full-bridge topology first switching tube (S
1) control signal and input side full-bridge topology second switching tube (S
2) control signal reciprocal, input side full-bridge topology the 3rd switching tube (S
3) control signal and input side full-bridge topology the 4th switching tube (S
4) control signal reciprocal, the control signal (S of outlet side full-bridge topology first switching tube
5) and outlet side full-bridge topology second switching tube (S
6) control signal reciprocal, outlet side full-bridge topology the 3rd switching tube (S
7) control signal and outlet side full-bridge topology the 4th switching tube (S
8) control signal reciprocal;
(3) input side full-bridge topology first switching tube (S is set
1) control signal and input side full-bridge topology the 3rd switching tube (S
3) the Phaseshift controlling amount of control signal be D
1, input side full-bridge topology first switching tube (S is set
1) control signal and outlet side full-bridge topology first brachium pontis on manage (S
5) the Phaseshift controlling amount of control signal be D
2, input side full-bridge topology first switching tube (S is set
1) control signal and the lower pipe (S of outlet side full-bridge topology second brachium pontis
7) the Phaseshift controlling amount of control signal be D
3;
(4) by regulating Phaseshift controlling amount D
1, D
2and D
3size complete the full-bridge isolation output voltage of bidirectional DC-DC converter and the control of power output, by regulating Phaseshift controlling amount D
1, D
2and D
3between relation be equivalent to other Method of Phase-Shift Controlling and complete Phaseshift controlling.
2. the normalization Method of Phase-Shift Controlling being applied to full-bridge isolation bidirectional DC-DC converter according to claim 1, it is characterized in that, the scope of described restriction Phaseshift controlling amount D1, D2 and D3, for be all greater than 0 degree, is less than or equal to 180 degree.
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|---|---|---|---|
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|---|---|---|---|
| CN201510391177.3A CN104935176B (en) | 2015-07-06 | 2015-07-06 | A kind of normalization Method of Phase-Shift Controlling for isolating two-way DC DC converters applied to full-bridge |
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Cited By (6)
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| CN105356759A (en) * | 2015-12-13 | 2016-02-24 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
| CN106712526A (en) * | 2017-03-10 | 2017-05-24 | 山东大学 | Control method for minimum current stress of double active bridge DC-DC converter on basis of consideration for dead zone effect |
| CN107425729A (en) * | 2017-08-03 | 2017-12-01 | 国网江苏省电力公司南京供电公司 | It is a kind of based on soft-switching process of the current-modulation than DAB that current efficiency optimizes |
| CN107425730A (en) * | 2017-08-03 | 2017-12-01 | 国网江苏省电力公司南京供电公司 | A kind of soft-switching process of the DAB based on current efficiency optimization |
| CN108400713A (en) * | 2018-03-15 | 2018-08-14 | 西南交通大学 | The optimization power balancing method of DC-DC converter in power electronics tractive transformer |
| CN108847773A (en) * | 2018-06-14 | 2018-11-20 | 西南交通大学 | Input series and output parallel full-bridge DC-DC converter multimode optimizes power balancing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356759A (en) * | 2015-12-13 | 2016-02-24 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
| CN105356759B (en) * | 2015-12-13 | 2019-01-22 | 魏腾飞 | A kind of PWM control method of two-way full-bridge DC-DC converter |
| CN106712526A (en) * | 2017-03-10 | 2017-05-24 | 山东大学 | Control method for minimum current stress of double active bridge DC-DC converter on basis of consideration for dead zone effect |
| CN107425729A (en) * | 2017-08-03 | 2017-12-01 | 国网江苏省电力公司南京供电公司 | It is a kind of based on soft-switching process of the current-modulation than DAB that current efficiency optimizes |
| CN107425730A (en) * | 2017-08-03 | 2017-12-01 | 国网江苏省电力公司南京供电公司 | A kind of soft-switching process of the DAB based on current efficiency optimization |
| CN108400713A (en) * | 2018-03-15 | 2018-08-14 | 西南交通大学 | The optimization power balancing method of DC-DC converter in power electronics tractive transformer |
| CN108847773A (en) * | 2018-06-14 | 2018-11-20 | 西南交通大学 | Input series and output parallel full-bridge DC-DC converter multimode optimizes power balancing method |
| CN108847773B (en) * | 2018-06-14 | 2020-06-09 | 西南交通大学 | Multi-module power balancing method for input-series output-parallel full-bridge DC-DC converter |
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