CN106712512A - Low-base-ripple high-power bi-directional DC/DC (Direct Current/Direct Current) circuit topology structure - Google Patents
Low-base-ripple high-power bi-directional DC/DC (Direct Current/Direct Current) circuit topology structure Download PDFInfo
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- CN106712512A CN106712512A CN201710007367.XA CN201710007367A CN106712512A CN 106712512 A CN106712512 A CN 106712512A CN 201710007367 A CN201710007367 A CN 201710007367A CN 106712512 A CN106712512 A CN 106712512A
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- Prior art keywords
- power
- circuit
- low
- ripple
- direct current
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Classifications
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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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
Abstract
The invention relates to a low-base-ripple high-power bi-directional DC/DC (Direct Current/Direct Current) circuit topology structure, which relates to the technical field of power electronics. A first filter circuit is connected to a U1 end in parallel; a second filter circuit is connected to a U2 end in parallel; a three-arm six-tube circuit formed by six switch tubes is connected onto the first filter circuit in parallel; each arm is formed by two switch tubes connected in series; one end of an electrical inductor is connected between the two switch tubes of each arm; the other end of each electrical inductor is connected with a positive terminal of the second filter circuit. According to the low-base-ripple high-power bi-directional DC/DC circuit topology structure provided by the invention, three groups of basic non-isolated BUCK and BOOST circuits are combined to realize bi-directional flow of energy, and low ripple is realized through shifting phases of three groups of PWM (Pulse-Width Modulation) by 120 degrees. By adopting a dispersed heat dissipation design, the low-base-ripple high-power bi-directional DC/DC circuit topology structure is suitable for meeting the requirement of high-power low-base-ripple non-isolated DC/DC power supply equipment.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly New energy automobile motor and electric machine controller test and
High-power bidirectional DC/DC the main circuit structures of battery charging and discharging test design.
Background technology
New-energy automobile has welcome the opportunity of high speed development by the development of last decade.With new-energy automobile production capacity
Lifting, the consumption of energy in the test of its direct upstream industry new energy motor, electric machine controller and new energy resource power battery
Increasingly it is taken seriously, the direct consuming type test power supply of the first generation（Braking in test process is regenerated energy or battery
Energy resistance in test is consumed in the form of heat, abbreviation consuming type）Test mode obviously with new energy industry energy-saving
The slogan of emission reduction is disagreed.The two-way feed-back type test power supply of the second generation also just enters everybody sight line, two-way feed-back type at this moment
Test power supply can be real the energy feedback in the braking regeneration energy or battery testing in new energy test process to power network
Recycling for energy is showed, the objective with the energy-saving and emission-reduction of new-energy automobile industry matches, so being increasingly subject to correlation
The attention of enterprise.
By high speed development in recent years, new-energy automobile power is limited to wind-cooling heat dissipating condition in gradually increased trend
Limitation, conventional two-way DC/DC circuit topologies power grade without too many space, already can not by two-way feed-back type test power supply
Meet new use demand.
Common basic non-isolated DC/DC topological structures have BUCK, BOOST, CUK, SEPIC, ZETA several, and the above is several
It is check configuration to plant circuit topological structure.
Traditional BUCK-BOOST circuits are depressured mode of operation for BUCK from left to right, and DC-BUS is source, and Uo is output
End；It is BOOST boost operating modes to be turned left from the right side, and DC-BUS is output end, and Uo is source.Wherein, Q1, Q2 be switching tube, C1,
C2 is electric capacity, and L1 is inductance, and R1, R2 are respectively the discharge resistances of C1, C2.
When BUCK decompression modes are operated in, switching tube Q1 is operated on off state, and switching tube Q2 is off state, only
The use of its body diode is inductance L1 afterflows.Now energy flows to Uo ends by DC-BUS ends.
When BOOST boost modes are operated in, switching tube Q1 is closed, and the body diode of Q1 ensures C1 electric energy not
Discharged by Q2, switching tube Q2 is operated on off state.Now energy flows to DC-BUS ends by Uo ends.
From above is the BUCK-BOOST circuits workflow analysis of routine：Either BUCK mode of operations are still
BOOST mode of operations, the span that the basic ripple of circuit is current ripples the rate r, usual r of circuit design is 0.2-
0.5, for convenience of calculation specifications, r takes 0.3 herein.First it is assumed that the design of DC is output as I1, then the basic ripple of circuit is
0.3I1, G1 are the drive waveforms of switching tube Q1, and L1 is inductive current waveform.It can be seen that inductive current waveform and the same frequency of drive waveforms
Rate and same-phase.
The content of the invention
The present invention is intended to provide a kind of suitable powerful two-way DC/DC circuit topological structures of low basic ripple.
The present invention includes U1 ends and U2 ends, in the first filter being made up of the first capacitor C1 and first resistor R1 in parallel of U1 ends
Wave circuit, the second filter circuit that parallel connection is made up of the second capacitor C2 and second resistance R2 at U2 ends, it is characterised in that：
The pipe circuit of three bridge arm six being made up of six switching tubes in parallel on one filter circuit, each of which bridge arm is opened by two concatenated
Pipe composition is closed, an one end for inductance, each inductance is each connected respectively between two switching tubes of each bridge arm
Positive terminal of the other end respectively with the second filter circuit be connected.
Each bridge arm distinguishes 120 degree of phase shift.
When U1 is source, for BUCK is depressured mode of operation when U2 is for output；It is BOOST when U1 is for output when U2 is source
Boost operating mode.The present invention is combined the bidirectional flow for realizing energy using three groups of basic non-isolated BUCK and BOOST circuit
It is dynamic, realize low ripple by three groups of 120 degree of phase shifts of PWM.Meanwhile, because having disperseed the layout of power switch pipe, advantageously
In the thermal design of whole machine, the room for promotion of power grade is greatly increased.The present invention uses scattered heat dissipation design, is a kind of being adapted to
The topological structure of the power-supply device of the non-isolated DC/DC of high-power low basic ripple.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the invention.
Fig. 2 is that the present invention is the switching tube driving voltage oscillogram of boost operating mode.
Fig. 3 is that the present invention is the switching tube driving voltage oscillogram of step-down mode of operation.
Fig. 4 is the corresponding bridge arm 1 of topological structure of the present invention, bridge arm 2, the correspondence driving of bridge arm 3 and current waveform figure.
The composite wave-shape figure of the road waveforms of Tu5Wei tri-.
Fig. 6 is the description waveform of the simulation waveform of the simulation software MATLAB _ simulink of circuit topological structure of the present invention
Figure.
Fig. 7 is the description oscillogram of the simulation waveform of the simulation software MATLAB _ simulink of traditional circuit topological structure.
Specific embodiment
As shown in figure 1, the present invention is in the positive terminal of U1, the positive terminal of electric capacity C1（That is 1 end）, 2 ends of resistance R1, switching tube
A points in the 2 ends difference connection figure 1 at 2 ends of Q1,2 ends of switching tube Q2 and switching tube Q3.The negative pole end of U1, electric capacity C1 it is negative
Extremely（That is 2 ends）, 1 end of resistance R1,3 ends of switching tube Q4,3 ends of switching tube Q5, the 3 ends difference connection figure 1 of switching tube Q6
In c points.The negative pole end of electric capacity C2（That is 2 ends）, 1 end of resistance R2, the negative pole end of U2 be also connected to the c points that Fig. 1 is.U2
Positive terminal, the positive terminal of electric capacity C2（That is 1 end, 2 ends of resistance R2,2 ends of inductance L1,2 ends of inductance L2,2 ends of inductance L3
It is connected respectively to the b points in Fig. 1.
Bridge arm 1 is constituted by switching tube Q1 and switching tube Q4：3 ends of switching tube Q1 are connected with 2 ends of switching tube Q4, and are opening
3 ends for closing pipe Q1 are connected by wire with 1 end of inductance L1.
Bridge arm 2 is constituted by switching tube Q2 and switching tube Q5：3 ends of switching tube Q2 are connected with 2 ends of switching tube Q5, and are opening
3 ends for closing pipe Q2 are connected by wire with 1 end of inductance L2.
Bridge arm 3 is constituted by switching tube Q3 and switching tube Q6：3 ends of switching tube Q3 are connected with 2 ends of switching tube Q6, and are opening
3 ends for closing pipe Q3 are connected by wire with 1 end of inductance L3.
Operation principle：When U1 is source, for BUCK is depressured mode of operation when U2 is for output；When U2 is source, when U1 is for output
For BOOST is boost operating mode.
Switching tube driving voltage waveform is as shown in Figure 2,3 when boosting and step-down work.
1st, when for BUCK mode of operations, switching tube Q1, Q2, Q3 are operated on off state, switching tube Q4, Q5, Q6 cut-off.
The driving voltage U of Q1-Q6G1-UG6Waveform as Fig. 2 BUCK step-down drive waveforms shown in.
Now U2=D*U1；Wherein D is the positive dutycycle of switching tube Q1, Q2, Q3.
2nd, when for BOOST mode of operations, switching tube Q1, Q2, Q3 cut-off, switching tube Q4, Q5, Q6 are operated in switch shape
State.The driving voltage U of Q1-Q6G1-UG6Waveform as Fig. 2 BOOST boosting drive waveforms shown in.
Now U1=U2/（1-D）, wherein D is the positive dutycycle of switching tube Q4, Q5, Q6.
3rd, PWM drive waveforms 120 degree of phase shift successively of bridge arm 1, bridge arm 2, bridge arm 3, PWM waveform phase schematically as follows Fig. 2
It is shown.
4th, processed by bridge arm 1, bridge arm 2, the phase shift of bridge arm 3, Fill valley treatment can be carried out to inductive current, so as to reduce
The basic ripple of circuit, reduces the capacity of filter capacitor C1 and filter capacitor C2, improves the dynamic property of circuit.
Fig. 4 show the corresponding bridge arm 1 of topological structure of the present invention, bridge arm 2, the correspondence of bridge arm 3 and drives and current waveform
Figure.
The composite wave-shape figure of the road waveforms of Tu5Wei tri-.
By the way that to bridge arm 1, bridge arm 2, bridge arm 3,120 degree of phase shift reaches mesh 120 degree of current waveform phase shift respectively
, because the output end short circuit of inductance（U1 ends are regarded herein by switching tube Q1, switching tube Q2, switching tube Q3 body diode short circuits
It is short circuit）The basic ripple of electric current, can be reduced to 1/3 of traditional circuit or so by the current peak superposition after phase shift.Many institutes
Known, switching tube and nonideal switching device has tube voltage drop Vce when switching tube is turned on, and is turned on and off in switching tube
Shi Huiyou it is extra turn on and off loss, or even by when also have leakage current caused by be lost, the problem of the above is illustrated
Switching tube does not always depart from the problem of heating and radiating in the course of the work, and with the increase of single tube power, the problem becomes outstanding
It is protrusion, inductance L there is also same problem.
Single powerful switching tube is dexterously divided into three low power switching tubes by the present invention, and cost has more advantage
Single heat generating spot is separated into three simultaneously, beneficial to heat dissipation design.The tri- groups of PWM of switching tube Q1, Q2, Q3 to circuit drive simultaneously
Waveform carries out 120 degree of phase shift treatment, and the characteristic being superimposed using its peak value can be greatly reduced basic ripple, reduce filter capacitor
Consumption.Current waveform figure after being superimposed by Fig. 4 illustrates can be seen that thickened portion is that the Overlay after electric current stabilization shows, is superimposed
Pulsation of current frequency increases to original 3 times afterwards, and the basic ripple of electric current is about reduced to original 1/3, is changed into 0.1I1.
Fig. 6 and Fig. 7 are the description waveforms of the simulation waveform of simulation software MATLAB _ simulink, and wherein Fig. 6 is the present invention
The simulated effect of circuit topology, Fig. 7 is the effect of traditional circuit topology, and contrast can be seen that the current ripples of this patent topology only
Have 1/3 or so of traditional circuit topology, ripple frequency is 3 times of conventional topologies structure, and Expected Results matches completely.Explanation
Topological structure of the present invention is fully able to get a desired effect.
The present invention can make the parameters such as whole machine uniform heat distribution, ripple better than traditional scheme, with calculating and simulation result base
This coincide.
Claims (2)
1. a kind of high-power bidirectional DC/DC circuit topological structures of low basic ripple, including U1 ends and U2 ends, U1 ends it is in parallel by
First filter circuit of the first capacitor C1 and first resistor R1 compositions, at U2 ends, parallel connection is by the second capacitor C2 and second resistance
Second filter circuit of R2 compositions, it is characterised in that：Three bridge arms being made up of six switching tubes in parallel on the first filter circuit
Six pipe circuits, each of which bridge arm is made up of two switching tubes for concatenating, between two switching tubes of each bridge arm
Respective one one end of inductance of connection respectively, the positive terminal of each other end of inductance respectively with the second filter circuit is connected.
2. the high-power bidirectional DC of low basic ripple/DC circuit topological structures according to claim 1, it is characterised in that：Often
One bridge arm distinguishes 120 degree of phase shift.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007367.XA CN106712512A (en) | 2017-01-05 | 2017-01-05 | Low-base-ripple high-power bi-directional DC/DC (Direct Current/Direct Current) circuit topology structure |
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|---|---|---|---|
| CN201710007367.XA CN106712512A (en) | 2017-01-05 | 2017-01-05 | Low-base-ripple high-power bi-directional DC/DC (Direct Current/Direct Current) circuit topology structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030161167A1 (en) * | 2002-02-28 | 2003-08-28 | Barnett Rick L. | Interleaved converter power factor correction method and apparatus |
| CN102616145A (en) * | 2012-03-29 | 2012-08-01 | 青岛易特优电子有限公司 | Regenerative braking energy storage device for electric automobile |
| CN105480098A (en) * | 2016-01-19 | 2016-04-13 | 重庆邮电大学 | Braking energy recovery system for electric vehicle |
| CN206442301U (en) * | 2017-01-05 | 2017-08-25 | 国充充电科技江苏股份有限公司 | A kind of high-power bidirectional DC/DC circuit topological structures of low basic ripple |
-
2017
- 2017-01-05 CN CN201710007367.XA patent/CN106712512A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030161167A1 (en) * | 2002-02-28 | 2003-08-28 | Barnett Rick L. | Interleaved converter power factor correction method and apparatus |
| CN102616145A (en) * | 2012-03-29 | 2012-08-01 | 青岛易特优电子有限公司 | Regenerative braking energy storage device for electric automobile |
| CN105480098A (en) * | 2016-01-19 | 2016-04-13 | 重庆邮电大学 | Braking energy recovery system for electric vehicle |
| CN206442301U (en) * | 2017-01-05 | 2017-08-25 | 国充充电科技江苏股份有限公司 | A kind of high-power bidirectional DC/DC circuit topological structures of low basic ripple |
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| CB03 | Change of inventor or designer information |
Inventor after: Pan Xiaogang Inventor after: Song Wendi Inventor after: Feng Lin Inventor after: Cheng Kang Inventor after: Zhang Wenbin Inventor after: Sun Qianshuang Inventor before: Song Wendi Inventor before: Pan Xiaogang Inventor before: Feng Lin Inventor before: Cheng Kang Inventor before: Zhang Wenbin Inventor before: Sun Qianshuang |
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Application publication date: 20170524 |