CN105226929A - A kind of change mode cascade converter - Google Patents
A kind of change mode cascade converter Download PDFInfo
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- CN105226929A CN105226929A CN201510545522.4A CN201510545522A CN105226929A CN 105226929 A CN105226929 A CN 105226929A CN 201510545522 A CN201510545522 A CN 201510545522A CN 105226929 A CN105226929 A CN 105226929A
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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
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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
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Abstract
The invention discloses a kind of change mode cascade converter.The output of pfc converter and the input of full-bridge converter are connected to be formed and become mode cascade converter, and the input of pfc converter and the output of full-bridge converter are respectively the input and output becoming mode cascade converter; The output voltage control desired value of pfc converter, and according to input voltage size determination output voltage; According to output voltage, full-bridge converter is selected to be operated in half-bridge mode or full-bridge mode.When the invention solves low input in correlation technique, the problem that circuit efficiency is low, achieves the high efficiency in gamut and the overall performance that improve circuit.
Description
Technical field
The present invention relates to a kind of AC/DC, DC/DC converter, particularly related to a kind of change mode cascade converter, achieve Active PFC (PowerFactorCorrection is called for short PFC) and the DC/DC conversion of cascade.
Background technology
Converters has been widely used in the every aspect of human being's production and life, and the efficiency of converter is directly connected to energy use efficiency, functional reliability, miniaturization and and material and saves; In addition, a large amount of uses of converters cause very serious harmonic pollution to electrical network.
Therefore global many pervasive AC/DC converters all have employed PFC structure as prime place in circuit, and it is the topology that a kind of relative efficiency is high, Harmonics of Input is little.When input voltage is lower, because corresponding input current is comparatively large, converter can be caused to there is large conduction loss and switching loss, and the bottleneck of thus raising the efficiency further is low input section.
The pervasive AC/DC converter in the whole world adopts one-level DC/DC converter as rear class output circuit usually.LLC resonant converter has former limit switch tube zero voltage and opens (ZeroVoltageSwitching, be called for short ZVS), secondary side diode zero-current switching (ZeroCurrentSwitching, be called for short ZCS) characteristic is a kind of ideal rear class output circuit.
Front and back stages transducer-level is linked togather, and when input voltage is low, the efficiency of converter is still lower, for this problem, not yet proposes effective solution at present.
Summary of the invention
Main purpose of the present invention there is provided and a kind of becomes mode cascade converter, to improve the efficiency of cascade converter under low input, thus realizes the high efficiency of cascade converter in wide input range.
To achieve these goals, the technical solution adopted for the present invention to solve the technical problems is:
The present invention is based on the flexible thought becoming mode current transformer, construct a kind of general change mode cascade converter be made up of pfc converter and full-bridge converter, this change mode cascade converter is according to input voltage size, select the operation mode of the most applicable conditions present neatly, to realize the high efficiency in gamut.
The output of pfc converter and the input of full-bridge converter are connected to be formed and become mode cascade converter by the present invention, and the input of pfc converter and the output of full-bridge converter are respectively the input and output becoming mode cascade converter; The output voltage control desired value of pfc converter, and be decided to be V respectively according to input voltage size
coor V
co/ 2, V
corepresent output capacitance C in pfc converter
ovoltage; Be V according to the output voltage of pfc converter
coor V
co/ 2, described full-bridge converter is selected to be operated in half-bridge mode or full-bridge mode respectively.
The output voltage control desired value of described pfc converter, is defined as V respectively according to input voltage size
coor V
co/ 2.More specifically, if input voltage amplitude is less than V
co/ 2, the output voltage of so described pfc converter is exactly V
co/ 2; If input voltage amplitude is greater than V
co/ 2, the output voltage of so described pfc converter is exactly V
co.Input voltage range due to global general-use is 85Vrms ~ 264rms, and typical low input is 100Vrms ~ 120Vrms, and typical high input voltage is 220Vrms ~ 240Vrms, the Representative output voltages V of traditional pfc converter
cobe typically chosen in about 400V.With traditional pfc converter unlike, for typical low input, described pfc converter output voltage is selected at about 200V; For typical high input voltage, described pfc converter output voltage is at about 400V.
Be V according to the output voltage of described pfc converter
coor V
cowhen/2, described full-bridge converter is selected to be operated in half-bridge mode or full-bridge mode respectively.More specifically, the DC bus-bar voltage utilance due to full-bridge mode is the twice of the DC bus-bar voltage utilance of half-bridge mode, therefore when the output voltage of described pfc converter is V
cotime, described full-bridge converter adopts half-bridge mode, when the output voltage of described pfc converter is V
cowhen/2, described full-bridge converter adopts full-bridge mode.Under both modes, the design performance of described full-bridge converter can reach optimum, thus is beneficial to the optimization of full-bridge converter efficiency.
Preferably, described pfc converter is non-bridge PFC converter.It should be noted that, pfc converter in traditional change mode cascade converter having bridge pfc converter also can propose as the present invention, but relative to non-bridge PFC converter, traditional has the conduction loss of bridge pfc converter higher, therefore the efficiency of non-bridge PFC converter is higher, is a kind of better selection.
Preferably, described non-bridge PFC converter can be crisscross parallel totem pillar non-bridge PFC converter, bidirectional switch type non-bridge PFC converter or two Boost type non-bridge PFC converter.
Described crisscross parallel totem pillar non-bridge PFC converter comprises one by four power MOSFET tube S
1~ S
4the full bridge structure of composition, one by diode D
s1with diode D
s2the half-bridge structure of composition and two inductance L be coupled
1and inductance L
2; Wherein, inductance L
1and inductance L
2one of them Same Name of Ends is connected and as the input a becoming mode cascade converter, another Same Name of Ends is connected with two brachium pontis mid points of full bridge structure respectively; The mid point of half-bridge structure is as the input b becoming mode cascade converter, and half-bridge structure is connected respectively with the two ends of full bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole.
Described bidirectional switch type non-bridge PFC converter comprises one by power MOSFET tube S
1with power MOSFET tube S
2the bidirectional switch of composition, one by fast diode D
f1with fast diode D
f2first half-bridge structure of composition, one by diode D at a slow speed
s1diode D at a slow speed
s2second half-bridge structure of composition and inductance L; Wherein, one end of inductance L as the input a becoming mode cascade converter, S in the other end of inductance L and bidirectional switch
1the drain electrode of pipe is connected with the mid point of the first half-bridge structure; S in bidirectional switch
2drain electrode be connected with the mid point of the second half-bridge structure, and as becoming the input b of mode cascade converter; First half-bridge structure is connected respectively with the two ends of the second half-bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole;
Described pair of Boost type non-bridge PFC converter comprises by one by fast diode D
f1with power MOSFET tube S
1first half-bridge structure of composition, one by fast diode D
f2with power MOSFET tube S
2second half-bridge structure, the inductance L of composition
1, inductance L
2, diode D at a slow speed
s1two pole D at a slow speed
s2; Wherein, inductance L
1one end and diode D
s1negative electrode to be connected and as the input a of change mode cascade converter, inductance L
1the other end be connected with the mid point of the first half-bridge structure; Inductance L
2one end and diode D
s2negative electrode to be connected and as the input b of change mode cascade converter, inductance L
2the other end be connected with the mid point of the second half-bridge structure; Diode D at a slow speed
s1diode D at a slow speed
s2anode be connected after and output capacitance C
onegative pole be connected; First half-bridge structure is connected respectively with the two ends of the second half-bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole.
When the output voltage of described non-bridge PFC converter is V
coor V
cowhen/2, its switching frequency is respectively f
sand f
s/ 2, to improve the efficiency of described non-bridge PFC converter further.More specifically, if the output voltage of described non-bridge PFC converter is V
co, corresponding switching frequency is f
s, the output voltage of so described non-bridge PFC converter is V
cowhen/2, the reduction due to output voltage can reduce the ripple size of inductive current, and thus its corresponding switching frequency can be less than f
s, as preferred representative value f
s/ 2.Due to the reduction of described non-bridge PFC converter output voltage and switching frequency, significantly can reduce the switching loss of described non-bridge PFC converter, thus improve the efficiency of described non-bridge PFC converter.
Described change mode cascade converter comprises a full-bridge converter.It should be noted that, full-bridge LCC converter can be selected as the one of described full-bridge converter.Preferably, described full-bridge converter is full-bridge LLC converter.This full-bridge LLC converter, according to the size of described pfc converter output voltage, is selected to be operated in half-bridge mode or full-bridge mode neatly.
More specifically, when the output voltage of described pfc converter is V
cotime, described full-bridge LLC converter is operated in half-bridge mode; When the output voltage of described change mode pfc converter is V
cowhen/2, described full-bridge LLC converter is operated in full-bridge mode.
Described full-bridge converter is full-bridge LLC converter.
Preferably, full-bridge LLC converter is band centre tapped zero formula rectifying full bridge LLC converter, bridge rectifier full-bridge LLC converter and bridge voltage-double rectification full-bridge LLC converter.
Described full-bridge mode, four switching tube S of full-bridge converter
5~ S
8whole participation switching over; Described half-bridge mode, four switching tube S of full-bridge converter
5~ S
8in, two switching tube HF switch wherein in same brachium pontis switch, and two switching tubes one in another brachium pontis keep normal open, another keeps normal off.
Preferably, described full-bridge mode, four switching tube S of full-bridge converter
5~ S
8whole participation switching over; Described half-bridge mode, four switching tube S of full-bridge converter
5~ S
8in, two switching tube HF switch in a power frequency period in a brachium pontis switch, and two switching tubes one in another brachium pontis keep normal open, another keeps normal off, and the switching mode of two brachium pontis is according to power frequency period rotation.
The invention has the beneficial effects as follows:
The present invention realizes simply ingenious, by adopting the change mode cascade converter be made up of pfc converter and full-bridge converter, can overcome the shortcoming of traditional pervasive AC/DC converter, significantly enhancing the efficiency of converter during low input scope.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, and accompanying drawing is used to provide a further understanding of the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the universal architecture block diagram of change mode cascade converter of the present invention.
Fig. 2 is the circuit theory diagrams of the first embodiment of change mode cascade converter of the present invention.
Fig. 3 is the equivalent circuit diagram of prime pfc converter in Fig. 2.
Fig. 4 is the principle oscillogram of prime pfc converter in Fig. 3.
Efficiency curve when Fig. 5 is the typical low input of prime pfc converter in Fig. 2.
Fig. 6 is the circuit theory diagrams of the second embodiment of change mode cascade converter of the present invention.
Fig. 7 is the circuit theory diagrams of the 3rd embodiment of change mode cascade converter of the present invention.
Fig. 8 is the circuit theory diagrams of the 4th embodiment of change mode cascade converter of the present invention.
Fig. 9 is the alternative topologies structure one of full-bridge LLC converter in the present invention.
Figure 10 is the alternative topologies structure two of full-bridge LLC converter in the present invention.
Figure 11 is full-bridge converter adoptable full-bridge LLC converter circuit schematic diagram in the present invention.
Embodiment
Fig. 1 is the theory diagram of the change mode cascade converter be made up of pfc converter and full-bridge converter that the present invention proposes.As shown in Figure 1, change mode cascade converter of the present invention is connected by the output of pfc converter and the input of full-bridge converter and is formed, and comprises a prime pfc converter and a rear class full-bridge converter.By a capacitive coupling between front and back stages circuit, the independence being convenient to front and back stages circuit controls, and the input of pfc converter and the output of full-bridge converter are respectively the input and output becoming mode cascade converter.
From the universal architecture block diagram of the change mode cascade converter shown in Fig. 1, this circuit working comprises following steps:
(1) the input voltage size of prime pfc converter is measured, the namely size of line voltage shown in Fig. 1.Fig. 1 acceptance of the bid shows two kinds of typical input voltage 100 ~ 120Vrms and 220 ~ 240Vrms in global range.
(2) if input voltage is high input voltage scope, typical 220 ~ 240Vrms as shown in fig. 1, now the output voltage of described pfc converter is chosen as V
co, representative value is as 400V; If input voltage is low input scope, as shown in fig. 1 typical 100 ~ 120Vrms, now the output voltage of described pfc converter is chosen as V
co/ 2, representative value is as 200V.
Preferably, assuming that during high input voltage scope, the switching frequency of described pfc converter is f
s, so when low input scope, the switching frequency f of described pfc converter can be reduced
s, as preferred representative value f can be adopted
s/ 2, the efficiency of described pfc converter during to improve low input scope further.
(3) be V according to the output voltage of prime pfc converter
coor V
co/ 2, select the mode of operation of described rear pole full-bridge converter.Preferably, described full-bridge converter is full-bridge LLC converter.If the output voltage of described pfc converter is V
co, so described full-bridge LLC converter is operated in half-bridge mode, in described half-bridge mode, and four switching tube S of full-bridge converter
5~ S
8in, two switching tube HF switch in a power frequency period in a brachium pontis switch, and two switching tubes one in another brachium pontis keep normal open, another keeps normal off, and the switching mode of two brachium pontis is according to power frequency period rotation; If the output voltage of described pfc converter is V
co/ 2, so described full-bridge LLC converter is operated in full-bridge mode, in described full-bridge mode, and four switching tube S of full-bridge converter
5~ S
8whole participation HF switch switches.Described full-bridge LLC converter adopts said method, is beneficial to LLC resonant network and carries out optimized design for appointment input voltage, thus reach the optimization of efficiency.
Gathered by above-mentioned step, can find out and the present invention proposes a kind of change mode cascade converter that is simple, that easily realize, the high efficiency in full voltage input range can be realized.
Fig. 2 is the circuit theory diagrams of the first embodiment of change mode cascade converter of the present invention.As shown in Figure 2, prime pfc converter is realized by the crisscross parallel totem pillar non-bridge PFC converter with coupling inductance, comprising: the inductance L of coupling
1and inductance L
2, power MOSFET tube S
1, S
2, S
3, S
4, diode D
s1and D
s2and output capacitance C
o.Rear class full-bridge converter is realized by a full-bridge LLC converter, comprising: resonant inductance L
r, resonant capacitance C
r, magnetizing inductance L
m, power MOSFET tube S
5, S
6, S
7, S
8, transformer primary side winding N
1, secondary winding N
2, secondary side diode D
1and D
2, output capacitance C and output loading R
o.
Fig. 3 gives the equivalent circuit diagram of the pfc converter of prime described in Fig. 2.As shown in Figure 3, the inductance L of coupling
1and inductance L
2three independently inductance can be equivalent to, be respectively: input inductance L
m, leakage inductance L
k1with leakage inductance L
k2, they and coupling inductance meet following relation, and wherein K is inductive coupling coefficient:
wherein
The present invention is directed to pfc converter described in prime, propose a kind of brand-new control method: phase shift 180 ° between two brachium pontis, alternation; The complementary conducting of upper and lower two power MOSFET tubes in same brachium pontis.Control method described in employing, the no-voltage that can realize all power MOSFET tubes in full-load range is open-minded.Fig. 4 gives the exemplar schematic oscillogram of pfc converter described in Fig. 3, as can be seen from this figure, before each power MOSFET tube is opened, its corresponding body diode starts afterflow, just can realize no-voltage when power MOSFET tube is opened open-minded, therefore the efficiency of described prime pfc converter can be accomplished very high.
Make due to the operation mode of Fig. 1 to the change mode cascade converter that the present invention proposes and having explained, in order to the optimization of realizing circuit performance, first embodiment of the change mode cascade converter circuit shown in Fig. 2 also follows the change modal control method shown in Fig. 1, is no longer described in detail to this mode of operation herein.
Fig. 5 gives efficiency curve during the typical low input of prime pfc converter in Fig. 2.Can find out, for typical low input 110Vrms, traditional pfc converter adopts output voltage V usually
cobe 400V, the switching frequency of its correspondence is 100kHz; The present invention then have employed output voltage V
cobe 200V, the switching frequency of its correspondence is 50kHz.As can be seen from efficiency curve comparing result, adopt control model of the present invention, in full-load range, during low input, the efficiency of prime pfc converter obtains and promotes significantly, achieves target of the present invention.
Fig. 6 is the circuit theory diagrams of the second embodiment of change mode cascade converter of the present invention.As shown in Figure 6, prime pfc converter is realized by bidirectional switch type non-bridge PFC converter, comprising: input inductance L, power MOSFET tube S
1and S
2the bidirectional switch of composition, four power diode D
f1, D
f2, D
s1, D
s2and output capacitance C
o.Rear class full-bridge converter is identical with the rear class full-bridge converter of the first embodiment shown in Fig. 2.
The concise and to the point operation principle of prime pfc converter is described below: when bidirectional switch is opened, and the electric current in inductance L increases, inductive energy storage; Bidirectional switch turns off after opening certain hour, and now the electric current of inductance L starts to reduce, and is stored in energy in inductance L to electric capacity C
owith load transfer, simultaneously input power v
salso to electric capacity C
oenergy is exported with load.
Fig. 7 is the circuit theory diagrams of the 3rd embodiment of change mode cascade converter of the present invention.As shown in Figure 7, prime pfc converter is realized by two Boost type non-bridge PFC converter, comprising: input inductance L
1and inductance L
2, power MOSFET tube S
1and S
2, four power diode D
f1, D
f2, D
s1, D
s2and output capacitance C
o.Rear class full-bridge converter is identical with the rear class full-bridge converter of the first embodiment shown in Fig. 2.
The concise and to the point operation principle of prime pfc converter is described below: as input power v
son just lower negative time, power MOSFET tube S
1open-minded, inductance L
1electric current increases, inductive energy storage; Power MOSFET tube S
1turn off after opening certain hour, now inductive current starts to reduce, and is stored in inductance L
1in energy to electric capacity C
owith load transfer, simultaneously input power v
salso to electric capacity C
oenergy is exported with load.As input power v
supper negative lower timing, now power MOSFET tube S
2and inductance L
2work, the course of work of circuit and described input power v
son just lower negative time the course of work similar.
Fig. 8 is the circuit theory diagrams of the 4th embodiment of change mode cascade converter of the present invention.As shown in Figure 8, prime pfc converter is realized by conventional bridge single tube BoostPFC converter, comprising: input inductance L
1, power MOSFET tube S
1, five power diode D
s1, D
s2, D
s3, D
s4and D
f1, and output capacitance C
o.Rear class full-bridge converter is identical with the rear class full-bridge converter of the first embodiment shown in Fig. 2.
The concise and to the point operation principle of prime pfc converter is described below: power MOSFET tube S
1when opening, inductance L
1on electric current increase, inductive energy storage; Power MOSFET tube S
1turn off after opening certain hour, now inductive current starts to reduce, and is stored in inductance L
1in energy to electric capacity C
owith load transfer, simultaneously input power v
salso to electric capacity C
oenergy is exported with load.
Make due to the operation mode of Fig. 1 to the change mode cascade converter that the present invention proposes and having explained, in order to the optimization of realizing circuit performance, second embodiment of the change mode cascade converter that Fig. 6, Fig. 7 and Fig. 8 are shown respectively, the 3rd embodiment, the 4th embodiment also follow the change modal control method shown in Fig. 1, are no longer described in detail to the mode of operation of each embodiment herein.
The available alternate topologies one of full-bridge LLC converter of the present invention, shown in rear class full-bridge converter with centre tapped zero formula rectifying full bridge LLC converter physical circuit the first embodiment as shown in Figure 2, can find out, the resonant network secondary of described full-bridge LLC converter have employed two complementary zero formula rectifier structures as output.
The available alternate topologies two of full-bridge LLC converter of the present invention, shown in bridge rectifier full-bridge LLC converter Fig. 9, can find out, the resonant network secondary of described full-bridge LLC converter have employed a diode full-bridge rectification structure as output.
The available alternate topologies three of full-bridge LLC converter of the present invention, bridge voltage-double rectification full-bridge LLC converter as shown in Figure 10, can be found out, the resonant network secondary of described full-bridge LLC converter have employed a diode voltage multiplying rectifier structure as output.Similarly, LLC resonant network secondary can also adopt other similar structures many as output, carries out in detail no longer one by one listing explanation herein.
Figure 11 is the detailed circuit schematic diagram of full-bridge converter of the present invention available full-bridge LCC converter, and described full-bridge LCC converter is made up of a LCC resonant network and secondary output circuit thereof.Similar with the secondary export structure of described full-bridge LLC converter, the secondary of full-bridge LCC converter exports and can adopt the centre tapped zero formula rectified output structure of band as shown in figure 11, also can adopt the bridge rectifier export structure shown in Fig. 9, bridge voltage-double rectification export structure etc. as shown in Figure 10, list in detail no longer one by one herein and be described.
As can be seen here, the present invention adopts pfc converter as front stage circuits, and pfc converter determines the output voltage of described pfc converter according to input line voltage size, reasonably arranges the switch operating frequency of described pfc converter; And adopt full-bridge LLC converter as late-class circuit, this full-bridge LLC converter, according to the output voltage size of prime, is selected to be adopt full-bridge LLC pattern or adopt half-bridge LLC pattern to carry out work neatly.When therefore solving low input in correlation technique, the problem that circuit efficiency is low, thus achieve the high efficiency in gamut, improve the overall performance of circuit, technique effect is significantly outstanding.
Claims (10)
1. one kind becomes mode cascade converter, it is characterized in that: the output of pfc converter and the input of full-bridge converter are connected to be formed and become mode cascade converter, the input of pfc converter and the output of full-bridge converter are respectively the input and output becoming mode cascade converter; The output voltage control desired value of pfc converter, and be decided to be V respectively according to input voltage size
coor V
co/ 2, V
corepresent output capacitance C in pfc converter
ovoltage; Be V according to the output voltage of pfc converter
coor V
co/ 2, described full-bridge converter is selected to be operated in half-bridge mode or full-bridge mode respectively.
2. one according to claim 1 becomes mode cascade converter, it is characterized in that: described pfc converter is non-bridge PFC converter.
3. one according to claim 2 becomes mode cascade converter, it is characterized in that: described non-bridge PFC converter is crisscross parallel totem pillar non-bridge PFC converter, and crisscross parallel totem pillar non-bridge PFC converter comprises one by four power MOSFET tube S
1~ S
4the full bridge structure of composition, one by diode D
s1with diode D
s2the half-bridge structure of composition and two inductance L be coupled
1and inductance L
2; Wherein, inductance L
1and inductance L
2one of them Same Name of Ends is connected and as the input a becoming mode cascade converter, another Same Name of Ends is connected with two brachium pontis mid points of full bridge structure respectively; The mid point of half-bridge structure is as the input b becoming mode cascade converter, and half-bridge structure is connected respectively with the two ends of full bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole.
4. one according to claim 2 becomes mode cascade converter, it is characterized in that: described non-bridge PFC converter is bidirectional switch type non-bridge PFC converter, and bidirectional switch type non-bridge PFC converter comprises one by power MOSFET tube S
1with power MOSFET tube S
2the bidirectional switch of composition, one by fast diode D
f1with fast diode D
f2first half-bridge structure of composition, one by diode D at a slow speed
s1diode D at a slow speed
s2second half-bridge structure of composition and inductance L; Wherein, one end of inductance L as the input a becoming mode cascade converter, S in the other end of inductance L and bidirectional switch
1the drain electrode of pipe is connected with the mid point of the first half-bridge structure; S in bidirectional switch
2drain electrode be connected with the mid point of the second half-bridge structure, and as becoming the input b of mode cascade converter; First half-bridge structure is connected respectively with the two ends of the second half-bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole;
5. one according to claim 2 becomes mode cascade converter, it is characterized in that: described non-bridge PFC converter is two Boost type non-bridge PFC converter, and two Boost type non-bridge PFC converter comprises by one by fast diode D
f1with power MOSFET tube S
1first half-bridge structure of composition, one by fast diode D
f2with power MOSFET tube S
2second half-bridge structure, the inductance L of composition
1, inductance L
2, diode D at a slow speed
s1two pole D at a slow speed
s2; Wherein, inductance L
1one end and diode D
s1negative electrode to be connected and as the input a of change mode cascade converter, inductance L
1the other end be connected with the mid point of the first half-bridge structure; Inductance L
2one end and diode D
s2negative electrode to be connected and as the input b of change mode cascade converter, inductance L
2the other end be connected with the mid point of the second half-bridge structure; Diode D at a slow speed
s1diode D at a slow speed
s2anode be connected after and output capacitance C
onegative pole be connected; First half-bridge structure is connected respectively with the two ends of the second half-bridge structure, and respectively with output capacitance C
opositive pole be connected with negative pole.
6. one according to claim 1 becomes mode cascade converter, it is characterized in that: described full-bridge converter is full-bridge LLC converter.
7. one according to claim 6 becomes mode cascade converter, it is characterized in that: described full-bridge LLC converter is band centre tapped zero formula rectifying full bridge LLC converter, bridge rectifier full-bridge LLC converter and bridge voltage-double rectification full-bridge LLC converter.
8. become mode cascade converter according to the arbitrary described one of Claims 1 to 5, it is characterized in that: when the output voltage of non-bridge PFC converter is V
coor V
cowhen/2, its switching frequency is respectively f
sand f
s/ 2, to improve the efficiency of described non-bridge PFC converter further.
9. the one according to claim 1 or 6 becomes mode cascade converter, it is characterized in that: under described full-bridge mode, four switching tube S of full-bridge converter
5~ S
8whole participation switching over; Under described half-bridge mode, four switching tube S of full-bridge converter
5~ S
8in, two switching tube HF switch in one of them brachium pontis switch, and two switching tubes one in another brachium pontis keep normal open, another keeps normal off.
10. one according to claim 9 becomes mode cascade converter, it is characterized in that: under described half-bridge mode, four switching tube S of full-bridge converter
5~ S
8in, two switching tube HF switch in power frequency period in one of them brachium pontis switch, and two switching tubes one in another brachium pontis keep normal open, another keeps normal off, and the switching mode of two brachium pontis is according to power frequency period rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545522.4A CN105226929B (en) | 2015-08-31 | 2015-08-31 | One kind becomes mode cascade converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510545522.4A CN105226929B (en) | 2015-08-31 | 2015-08-31 | One kind becomes mode cascade converter |
Publications (2)
| Publication Number | Publication Date |
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| CN105226929A true CN105226929A (en) | 2016-01-06 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515417A (en) * | 2016-01-26 | 2016-04-20 | 南京航空航天大学 | Double-output single-phase PFC convertor and combined type power conversion system and control method thereof |
| CN106026630A (en) * | 2016-05-18 | 2016-10-12 | 浙江大学 | Variable-modal bridgeless PFC circuit |
| CN108448913A (en) * | 2018-03-07 | 2018-08-24 | 浙江大学 | A kind of isolated form AC-DC converter of the single stage type based on crisscross parallel non-bridge PFC circuits and LLC resonance |
| CN108667325A (en) * | 2018-06-05 | 2018-10-16 | 浙江大学 | A kind of high-gain isolated form three-level formula multiple-channel output DC-AC converters of no duty-cycle loss |
| CN109617431A (en) * | 2019-01-27 | 2019-04-12 | 广州金升阳科技有限公司 | A kind of AC/DC power-supply system and its control method |
| CN110108266A (en) * | 2019-05-08 | 2019-08-09 | 南京理工大学 | The real-time automated closed-loop mode matching method of gyro based on mechanical VCO phaselocked loop |
| CN110933815A (en) * | 2019-12-03 | 2020-03-27 | 哈尔滨理工大学 | LED driving power supply and digital control method thereof |
| CN112636580A (en) * | 2020-12-08 | 2021-04-09 | 佛山市顺德区美的电子科技有限公司 | Power factor correction device and method and household appliance |
| CN114157178A (en) * | 2021-11-01 | 2022-03-08 | 西南交通大学 | Novel traction converter |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515417A (en) * | 2016-01-26 | 2016-04-20 | 南京航空航天大学 | Double-output single-phase PFC convertor and combined type power conversion system and control method thereof |
| CN106026630A (en) * | 2016-05-18 | 2016-10-12 | 浙江大学 | Variable-modal bridgeless PFC circuit |
| CN108448913A (en) * | 2018-03-07 | 2018-08-24 | 浙江大学 | A kind of isolated form AC-DC converter of the single stage type based on crisscross parallel non-bridge PFC circuits and LLC resonance |
| CN108667325A (en) * | 2018-06-05 | 2018-10-16 | 浙江大学 | A kind of high-gain isolated form three-level formula multiple-channel output DC-AC converters of no duty-cycle loss |
| CN109617431A (en) * | 2019-01-27 | 2019-04-12 | 广州金升阳科技有限公司 | A kind of AC/DC power-supply system and its control method |
| WO2020151272A1 (en) * | 2019-01-27 | 2020-07-30 | 广州金升阳科技有限公司 | Ac/dc power supply system and control method thereof |
| CN110108266A (en) * | 2019-05-08 | 2019-08-09 | 南京理工大学 | The real-time automated closed-loop mode matching method of gyro based on mechanical VCO phaselocked loop |
| CN110108266B (en) * | 2019-05-08 | 2021-01-15 | 南京理工大学 | Gyro real-time automatic closed-loop mode matching method based on mechanical VCO phase-locked loop |
| CN110933815A (en) * | 2019-12-03 | 2020-03-27 | 哈尔滨理工大学 | LED driving power supply and digital control method thereof |
| CN112636580A (en) * | 2020-12-08 | 2021-04-09 | 佛山市顺德区美的电子科技有限公司 | Power factor correction device and method and household appliance |
| CN114157178A (en) * | 2021-11-01 | 2022-03-08 | 西南交通大学 | Novel traction converter |
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