CN104953846A - Wide-range input efficient direct current-direct current converter - Google Patents
Wide-range input efficient direct current-direct current converter Download PDFInfo
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- CN104953846A CN104953846A CN201510333403.2A CN201510333403A CN104953846A CN 104953846 A CN104953846 A CN 104953846A CN 201510333403 A CN201510333403 A CN 201510333403A CN 104953846 A CN104953846 A CN 104953846A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a wide-range input efficient direct current-direct current converter, which comprises a boost interleaved boosted circuit, a resonance half-bridge transformation circuit, a synchronous rectification and filter circuit and a DSP (digital signal processor) digital control circuit, wherein the boost interleaved boosted circuit consists of two boost circuits; the resonance half-bridge transformation circuit consists of two resonance circuits, and input ends of the two resonance circuits are connected in series, and are connected with the output end of the boost interleaved boosted circuit; the synchronous rectification and filter circuit consists of two synchronous rectification networks arranged in parallel, and the input end of each synchronous rectification network is connected with the output end of the corresponding resonance circuit; the DSP digital control circuit is respectively connected with the boost interleaved boosted circuit, the resonance half-bridge transformation circuit and the synchronous rectification and filter circuit. According to the wide-range input efficient direct current-direct current converter disclosed by the invention, the disadvantages of high switching loss and brought EMI (electro-magnetic interference) characteristic worsening of a direct current-direct current converter are solved.
Description
Technical field
The invention belongs to DC voltage conversion technical field, particularly a kind of wide region input efficient direct current-DC converter.
Background technology
Along with the further raising further developing and require power supply product of power electronics industry, the particularly application that grows with each passing day of current high voltage super capacitor electrokinetic cell, direct-current voltage conversion device is had higher requirement, such as, in middle power applications, often require that DC-DC converter can the work of stability and high efficiency in 200V-700V voltage range.
At present, common PWM code converter is under the voltage input environment of wide region so, and its work effective duty cycle also will change so wide scope thereupon.Because narrower duty ratio causes large RMS current value, all drawbacks such as high switching loss and the EMI characteristic degradation that brings are all that under affecting wide region initial conditions, single topology cannot the principal element of normal use.
Summary of the invention
For above-mentioned technical problem, the invention discloses a kind of wide region input efficient direct current-DC converter, under wide input voltage, solve high switching loss problem, realize high-efficiency transfer, there is EMI performance good simultaneously, the advantage of the complete grade of defencive function.
In order to realize according to object of the present invention, provide a kind of wide region input efficient direct current-DC converter, comprising:
BOOST crisscross parallel booster circuit, it is made up of the BOOST circuit that two are arranged in parallel, and the input of described BOOST crisscross parallel booster circuit is connected with DC power supply;
Resonance oscillation semi-bridge translation circuit, it is made up of two resonant circuits, and the input of two described resonant circuits is arranged in series between the output of described BOOST crisscross parallel booster circuit, and an output drawn by each described resonant circuit;
Synchronous rectification filter circuit, it is made up of the synchronous rectification network that two are arranged in parallel, the input of synchronous rectification network described in each is connected with the output of resonant circuit described in one of them respectively, the output output as described DC-DC converter in parallel of two described synchronous rectification networks;
DSP digital control circuit, it is connected with described BOOST crisscross parallel booster circuit, resonance oscillation semi-bridge translation circuit and synchronous rectification filter circuit respectively.
Preferably, described wide region input efficient direct current-DC converter also comprises DC input voitage filter circuit, its input is connected with described DC power supply, the output of described DC input voitage filter circuit is connected with the input of described BOOST crisscross parallel booster circuit, and described DC input voitage filter circuit is the π type filter circuit be made up of the first electric capacity Cf1, the second electric capacity Cf2 and the first common mode inductance Lf1.
Preferably; described wide region input efficient direct current-DC converter also comprises reverse-connection protection circuit; it is made up of three strip branch roads; comprise the first diode Da and the first resistance Ra is composed in series the first strip branch road; first relay Sa1 forms the second strip branch road; first controllable silicon Sa2 forms the sub-branch road of Article 3, and each branch circuit parallel connection is arranged on the positive DC transmission line between described DC input voitage filter circuit and described BOOST crisscross parallel booster circuit.
Preferably, first described BOOST circuit is by the first inductance L 1, diode D1, first switching tube S1, 4th electric capacity Cd1, 5th electric capacity Cd2 forms, second described BOOST circuit is by the second inductance L 2, 3rd diode D2, second switch pipe S2, 4th electric capacity Cd1, 5th electric capacity Cd2 forms, described first inductance L 1 connects altogether with the input of described second inductance L 2, the negative pole of described second diode D1 and described 3rd diode D2 connects altogether, described 4th electric capacity Cd1 and the 5th electric capacity Cd2 is arranged in series between the both positive and negative polarity of the direct current transmission circuit of described second diode D1 rear class.
Preferably, two described resonant circuits are LLC resonance oscillation semi-bridge translation circuit, and first described resonant circuit comprises:
3rd switching tube S3 and the 4th switching tube S4, is arranged in series the two ends at described 4th electric capacity Cd1 both it; 6th electric capacity Cr1 and the 7th electric capacity Cr2, is arranged in series the two ends at described 4th electric capacity Cd1 both it; 3rd inductance L r1 and the first former limit of transformer T1, be arranged in series both it, one end of described 3rd inductance L r1 is connected on the branch road between described 3rd switching tube S3 and the 4th switching tube S4, the other end of described 3rd inductance L r1 is connected with the one end on the described first former limit of transformer T1, and its other end is connected on the branch road between described 6th electric capacity Cr1 and the 7th electric capacity Cr2;
Second described resonant circuit comprises:
5th switching tube S5 and the 6th switching tube S6, is arranged in series the two ends at described 5th electric capacity Cd2 both it; 8th electric capacity Cr3 and the 9th electric capacity Cr4, is arranged in series the two ends at described 5th electric capacity Cd2 both it; 4th inductance L r2 and the second former limit of transformer T2, be arranged in series both it, one end of described 4th inductance L r2 is connected on the branch road between described 5th switching tube S5 and the 6th switching tube S6, the other end of described 4th inductance L r2 is connected with the one end on the described second former limit of transformer T2, and its other end is connected on the branch road between described 8th electric capacity Cr3 and the 9th electric capacity Cr4.
Preferably, first described synchronous rectification network comprises: the first transformer T1 secondary, the 7th switching tube S7, the 8th switching tube S8 and the tenth electric capacity Co; Second described synchronous rectification network comprises: the second transformer T2 secondary, the 9th switching tube S9, the tenth switching tube S10 and the tenth electric capacity Co, the syndeton of first, second described synchronous rectification network is identical, and first, second described synchronous rectification network output is in parallel.
Preferably, described first switching tube S1 and second switch pipe S2 operating frequency are at 50KHz ~ 200KHz, and described first switching tube S1 differs 180 ° with the conducting sequential of second switch pipe S2.
Preferably, described 3rd switching tube S3 differs 90 ° with the conducting sequential of the 5th switching tube S5, and described 4th switching tube S4 differs 90 ° with the conducting sequential of the 6th switching tube S6.
The present invention at least comprises following beneficial effect:
1, achieve the steady operation in wide-range input voltage, expand the range of application of converter, improve the utilance of converter;
2, the switching loss in converter is less;
3, the EMI performance of converter is better;
4, the operating efficiency of converter is higher.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of DC-DC converter of the present invention;
Fig. 2 is physical circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to specification word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other element one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.
As illustrated in fig. 1 and 2 be a kind of way of realization according to wide region of the present invention input efficient direct current-DC converter, comprising:
BOOST crisscross parallel booster circuit 3, it is made up of two BOOST circuit, and input and the output of each described BOOST circuit are arranged in parallel respectively, and the input of described BOOST crisscross parallel booster circuit is connected with DC power supply.In the present embodiment, first described BOOST circuit is made up of the first inductance L 1, diode D1, the first switching tube S1, the 4th electric capacity Cd1, the 5th electric capacity Cd2, first inductance L 1, diode D1 are connected on the direct-flow positive pole of converter, first switching tube S1 one end is connected between the first inductance L 1 and diode D1, and the other end is connected on converter direct current negative pole.Second described BOOST circuit is made up of the second inductance L 2, the 3rd diode D2, second switch pipe S2, the 4th electric capacity Cd1, the 5th electric capacity Cd2, its syndeton is identical with first described BOOST circuit, described first inductance L 1 is connected with the input of described second inductance L 2, described second diode D1 is connected with the negative pole of described 3rd diode D2, described 4th electric capacity Cd1 and the 5th electric capacity Cd2 is arranged in series between the both positive and negative polarity of the converter direct current transmission circuit of described second diode D1 rear class, as the output of BOOST crisscross parallel booster circuit 3.
Resonance oscillation semi-bridge translation circuit 4, it is made up of two resonant circuits, the input of two described resonant circuits is connected and is connected with the output of described BOOST crisscross parallel booster circuit 3, an output drawn by each described resonant circuit, the namely input series connection of two resonant circuits, output is in parallel.In the present embodiment, first described resonant circuit is LLC resonance oscillation semi-bridge translation circuit, comprising: the 3rd switching tube S3 and the 4th switching tube S4, is arranged in series the two ends at described 4th electric capacity Cd1 both it; 6th electric capacity Cr1 and the 7th electric capacity Cr2, be arranged in series the two ends at described 4th electric capacity Cd1 both it, that is these three articles of branch roads of the 4th electric capacity Cd1, the 3rd switching tube S3 and the 4th switching tube S4, the 6th electric capacity Cr1 and the 7th electric capacity Cr2 are parallel with one another; 3rd inductance L r1 and the first transformer T1 former limit inductance, be arranged in series both it, one end of described 3rd inductance L r1 is connected on the branch road between described 3rd switching tube S3 and the 4th switching tube S4, the other end of described 3rd inductance L r1 is connected with the one end on the described first former limit of transformer T1, its other end is connected on the branch road between described 6th electric capacity Cr1 and the 7th electric capacity Cr2, and the first former limit of transformer T1 is the output of first described resonant circuit.Second described resonant circuit comprises: the 5th switching tube S5 and the 6th switching tube S6, is arranged in series the two ends at described 5th electric capacity Cd2 both it; 8th electric capacity Cr3 and the 9th electric capacity Cr4, is arranged in series the two ends at described 5th electric capacity Cd2 both it; 4th inductance L r2 and the second former limit of transformer T2, be arranged in series both it, one end of described 4th inductance L r2 is connected on the branch road between described 5th switching tube S5 and the 6th switching tube S6, the other end of described 4th inductance L r2 is connected with the one end on the described second former limit of transformer T2, and its other end is connected on the branch road between described 8th electric capacity Cr3 and the 9th electric capacity Cr4.3rd switching tube S3, the 4th switching tube S4, the 5th switching tube S5, the 6th switching tube S6 are connected between the both positive and negative polarity of converter direct current transmission circuit successively, and the second former limit of transformer T2 is the output of second described resonant circuit.Two resonant circuit input series connection, output is in parallel, improves resonance oscillation semi-bridge translation circuit 4 voltage input capability, improves the conversion capacity of variator simultaneously.
Synchronous rectification filter circuit 5, it is made up of the synchronous rectification network that two are arranged in parallel, the input of synchronous rectification network described in each is connected with the output of resonant circuit described in one of them, the output output as described DC-DC converter in parallel of synchronous rectification network described in each.In the present embodiment, first described synchronous rectification network comprises: the first transformer T1 secondary, 7th switching tube S7, 8th switching tube S8 and the tenth electric capacity Co, 7th switching tube S7 one end is connected with one end of the first transformer T1 secondary, 8th switching tube S8 one end is connected with the other end of the first transformer T1 secondary, the other end of the 7th switching tube S7 and the 8th switching tube S8 connects altogether, what contact and described 7th switching tube S7 and the 8th switching tube S8 were drawn in the first transformer T1 secondary center connects the output held as first described synchronous rectification network altogether, the described tenth electric capacity Co of filtering is set between it, second described synchronous rectification network comprises: the syndeton of the second transformer T2 secondary, the 9th switching tube S9, the tenth switching tube S10 and first, second described synchronous rectification network of the tenth electric capacity Co is identical, second described synchronous rectification network input is connected with the second former limit of transformer T2, output is in parallel with the output of first described synchronous rectification network, as shown in Figure 2.Two synchronous rectification networks be arranged in parallel, power output is shared on each synchronous rectification network be arranged in parallel, and effectively improves variator power output.
DSP digital control circuit 6, it is connected with described BOOST crisscross parallel booster circuit 3, resonance oscillation semi-bridge translation circuit 4 and synchronous rectification filter circuit 5 respectively, in the present embodiment, adopt DSP (digital signal processor, digital signal processor) management control, DSP carries out sampling processing to main power voltage current temperature signal, then completes Sa1-Sa2, the break-make of S1-S10 controls, and finally obtains required voltage, electric current output controls whole converter.
In another embodiment, in technique scheme, described wide region input efficient direct current-DC converter also comprises filter circuit 1, its input is connected with described DC power supply, the output of described DC input voitage filter circuit 1 is connected with the input of described BOOST crisscross parallel booster circuit 3, and described DC input voitage filter circuit 1 is the π type filter circuit be made up of the first electric capacity Cf1, the second electric capacity Cf2 and the first common mode inductance Lf1.
In another embodiment, in technique scheme, described wide region input efficient direct current-DC converter also comprises reverse-connection protection circuit 2, it is arranged between filter circuit 1 and BOOST crisscross parallel booster circuit 3, if input reverse-connection, converter can not damage, and can not work, reverse-connection protection circuit 2 is made up of three strip branch roads, comprise the first diode Da and the first resistance Ra is composed in series the first strip branch road, first relay Sa1 forms the second strip branch road, first controllable silicon Sa2 forms the sub-branch road of Article 3, each branch circuit parallel connection is arranged on the positive DC transmission line between described DC input voitage filter circuit and described BOOST crisscross parallel booster circuit, Sa1-Sa2 is connected with control circuit 6, in input without reversal connection, during normal boot-strap, resistance Ra plays the effect of restriction impulse current.After DSP detects that power up terminates, DSP is had to send instruction closing relay by resistance Ra branch road short circuit.Meanwhile, by controllable silicon Ka2 conducting, whole start process terminates.
In technique scheme, described first switching tube S1 and second switch pipe S2 operating frequency are at 50KHz ~ 200KHz, described first switching tube S1 differs 180 ° with the conducting sequential of second switch pipe S2, first inductance L 1 and second inductance L 2 of boosting BOOST circuit are operated in critical conduction mode, decrease transient high voltage when described first switching tube S1 and second switch pipe S2 switches, namely improve the EMI performance of circuit, decrease switching loss, simultaneously, two BOOST circuit in parallel arrange the conversion capacity that effectively improve converter, expand the input voltage range of variator, after high input voltage is stabilized in certain limit, converted by late-class circuit.
In technique scheme, described 3rd switching tube S3 differs 90 ° with the conducting sequential of the 5th switching tube S5, ripple current on output filter capacitor can be effectively reduced, described 4th switching tube S4 differs 90 ° with the conducting sequential of the 6th switching tube S6, and the switching frequency of the 3rd switching tube S3, the 5th switching tube S5, the 4th switching tube S4, the 6th switching tube S6 is: 60KHz ~ 200KHz.
In specific embodiment, the input voltage range of converter is 200V ~ 700V, make the scope of application of converter wider, converter of the present invention is when being operated in stable state, and the switch tube working status of the first resonant circuit is: first conducting the 3rd switching tube S3, after half switch periods, turn off the 3rd switching tube S3, after Dead Time, then conducting the 4th switching tube S4, so circulation is gone down.The switch tube working status of the second resonant circuit is: first conducting the 3rd switching tube S5, after half switch periods, turns off the 3rd switching tube S5, after Dead Time, then conducting the 4th switching tube S6, so circulation is gone down.The conducting sequential of switching tube S7-S10 is consistent with the conducting sequential of switching tube S3-S6, required voltage, electric current is obtained through conversion, in the converter course of work, effectively reduce the saltus step of voltage, reduce the ripple on output current, namely reduce the switching loss in converter, improve EMI performance, achieve the steady operation of converter under wide-range input voltage simultaneously.Switching tube Sa1-Sa2, switching tube S1-S10 can realize Sofe Switch easily, improves the efficiency of converter.Two sub-resonant circuits adopt input series connection, and output parallel-connection structure, reduces the voltage stress of switching tube S3-S6, reduce the current stress of switching tube S7-S10, make it possible to the switching tube selecting cost performance higher, improve the performance of converter, reduce cost.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification and execution mode utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (8)
1. wide region input efficient direct current-DC converter, is characterized in that, comprising:
BOOST crisscross parallel booster circuit, it is made up of the BOOST circuit that two are arranged in parallel, and the input of described BOOST crisscross parallel booster circuit is connected with DC power supply;
Resonance oscillation semi-bridge translation circuit, it is made up of two resonant circuits, and the input of two described resonant circuits is arranged in series between the output of described BOOST crisscross parallel booster circuit, and an output drawn by each described resonant circuit;
Synchronous rectification filter circuit, it is made up of the synchronous rectification network that two are arranged in parallel, the input of synchronous rectification network described in each is connected with the output of resonant circuit described in one of them respectively, the output output as described DC-DC converter in parallel of two described synchronous rectification networks;
DSP digital control circuit, it is connected with described BOOST crisscross parallel booster circuit, resonance oscillation semi-bridge translation circuit and synchronous rectification filter circuit respectively.
2. wide region input efficient direct current-DC converter as claimed in claim 1, it is characterized in that, also comprise DC input voitage filter circuit, its input is connected with described DC power supply, the output of described DC input voitage filter circuit is connected with the input of described BOOST crisscross parallel booster circuit, and described DC input voitage filter circuit is the π type filter circuit be made up of the first electric capacity Cf1, the second electric capacity Cf2 and the first common mode inductance Lf1.
3. wide region input efficient direct current-DC converter as claimed in claim 2; it is characterized in that; also comprise reverse-connection protection circuit; it is made up of three strip branch roads; comprise the first diode Da and the first resistance Ra is composed in series the first strip branch road; first relay Sa1 forms the second strip branch road; first controllable silicon Sa2 forms the sub-branch road of Article 3, and each branch circuit parallel connection is arranged on the positive DC transmission line between described DC input voitage filter circuit and described BOOST crisscross parallel booster circuit.
4. wide region input efficient direct current-DC converter as claimed in claim 1, it is characterized in that, first described BOOST circuit is by the first inductance L 1, diode D1, first switching tube S1, 4th electric capacity Cd1, 5th electric capacity Cd2 forms, second described BOOST circuit is by the second inductance L 2, 3rd diode D2, second switch pipe S2, 4th electric capacity Cd1, 5th electric capacity Cd2 forms, described first inductance L 1 connects altogether with the input of described second inductance L 2, the negative pole of described second diode D1 and described 3rd diode D2 connects altogether, described 4th electric capacity Cd1 and the 5th electric capacity Cd2 is arranged in series between the both positive and negative polarity of the direct current transmission circuit of described second diode D1 rear class.
5. wide region input efficient direct current-DC converter as claimed in claim 4, it is characterized in that, two described resonant circuits are LLC resonance oscillation semi-bridge translation circuit, and first described resonant circuit comprises:
3rd switching tube S3 and the 4th switching tube S4, is arranged in series the two ends at described 4th electric capacity Cd1 both it;
6th electric capacity Cr1 and the 7th electric capacity Cr2, is arranged in series the two ends at described 4th electric capacity Cd1 both it;
3rd inductance L r1 and the first former limit of transformer T1, be arranged in series both it, one end of described 3rd inductance L r1 is connected on the branch road between described 3rd switching tube S3 and the 4th switching tube S4, the other end of described 3rd inductance L r1 is connected with the one end on the described first former limit of transformer T1, and its other end is connected on the branch road between described 6th electric capacity Cr1 and the 7th electric capacity Cr2;
Second described resonant circuit comprises:
5th switching tube S5 and the 6th switching tube S6, is arranged in series the two ends at described 5th electric capacity Cd2 both it;
8th electric capacity Cr3 and the 9th electric capacity Cr4, is arranged in series the two ends at described 5th electric capacity Cd2 both it;
4th inductance L r2 and the second former limit of transformer T2, be arranged in series both it, one end of described 4th inductance L r2 is connected on the branch road between described 5th switching tube S5 and the 6th switching tube S6, the other end of described 4th inductance L r2 is connected with the one end on the described second former limit of transformer T2, and its other end is connected on the branch road between described 8th electric capacity Cr3 and the 9th electric capacity Cr4.
6. wide region input efficient direct current-DC converter as claimed in claim 5, it is characterized in that, first described synchronous rectification network comprises: the first transformer T1 secondary, the 7th switching tube S7, the 8th switching tube S8 and the tenth electric capacity Co; Second described synchronous rectification network comprises: the second transformer T2 secondary, the 9th switching tube S9, the tenth switching tube S10 and the tenth electric capacity Co, the syndeton of first, second described synchronous rectification network is identical, and first, second described synchronous rectification network output is in parallel.
7. wide region input efficient direct current-DC converter as claimed in claim 4, it is characterized in that, described first switching tube S1 and second switch pipe S2 operating frequency are at 50KHz ~ 200KHz, and described first switching tube S1 differs 180 ° with the conducting sequential of second switch pipe S2.
8. wide region input efficient direct current-DC converter as claimed in claim 5, it is characterized in that, described 3rd switching tube S3 differs 90 ° with the conducting sequential of the 5th switching tube S5, and described 4th switching tube S4 differs 90 ° with the conducting sequential of the 6th switching tube S6.
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| CN106655771A (en) * | 2016-08-31 | 2017-05-10 | 深圳市航天新源科技有限公司 | Power supply converter suitable for coach powered by hydrogen proton membrane fuel cell |
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| CN108233719A (en) * | 2018-02-01 | 2018-06-29 | 湖南意谱电动系统有限公司 | A kind of llc circuits that can adapt to wide output voltage range and control method |
| CN110601566A (en) * | 2019-08-18 | 2019-12-20 | 南京博兰得电子科技有限公司 | Adapter power supply and control method thereof |
| CN110518817A (en) * | 2019-10-09 | 2019-11-29 | 哈尔滨理工大学 | A kind of improved three-phase mixed-rectification device based on crisscross parallel |
| CN112953203A (en) * | 2021-03-22 | 2021-06-11 | 千黎（苏州）电源科技有限公司 | Combined staggered direct current conversion system without ripples at output |
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