CN112994466B - Converter with wide voltage regulation range - Google Patents
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- CN112994466B CN112994466B CN202110201776.XA CN202110201776A CN112994466B CN 112994466 B CN112994466 B CN 112994466B CN 202110201776 A CN202110201776 A CN 202110201776A CN 112994466 B CN112994466 B CN 112994466B
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- 230000033228 biological regulation Effects 0.000 title claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 56
- 239000003990 capacitor Substances 0.000 claims abstract description 55
- 238000004804 winding Methods 0.000 claims abstract description 46
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- XOIQMTLWECTKJL-HXPDMXKUSA-M sodium;(3r,4s)-4-[(2s,5r,7s,8r,9s)-2-[(2r,5s)-5-ethyl-5-[(2r,3s,5r)-5-[(2s,3s,5r,6r)-6-hydroxy-6-(hydroxymethyl)-3,5-dimethyloxan-2-yl]-3-methyloxolan-2-yl]oxolan-2-yl]-7-hydroxy-2,8-dimethyl-1,10-dioxaspiro[4.5]decan-9-yl]-3-methoxy-2-methylpentanoate Chemical compound [Na+].C([C@@](O1)(C)[C@H]2CC[C@@](O2)(CC)[C@H]2[C@H](C[C@@H](O2)[C@@H]2[C@H](C[C@@H](C)[C@](O)(CO)O2)C)C)C[C@@]21C[C@H](O)[C@@H](C)[C@@H]([C@@H](C)[C@@H](OC)C(C)C([O-])=O)O2 XOIQMTLWECTKJL-HXPDMXKUSA-M 0.000 description 1
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal 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
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a converter with a wide voltage regulation range, which comprises a first inverter circuit and a primary side winding which are positioned on the primary side of the converter, a first rectifying circuit and a secondary side winding which are positioned on the secondary side of the converter, and a DC/DC voltage regulation circuit; the DC/DC voltage regulating circuit is connected in series to the first inverter circuit; one end of the first inverter circuit is connected with the DC/DC voltage regulating circuit in series, the input end of the first inverter circuit is connected with a capacitor, the input end of the DC/DC voltage regulating circuit is connected with a capacitor, the DC/DC voltage regulating circuit is connected with at least two second inverter circuits in parallel, and the input end of each second inverter circuit is connected with a capacitor; the output ends of the first inverter circuit and the second inverter circuit are connected with corresponding windings. According to the invention, the input voltage or the output voltage is connected in parallel with the DC/DC voltage regulating circuit by utilizing a plurality of inverter circuits, or a plurality of rectifier circuits are connected in parallel with the DC/DC voltage regulating circuit for voltage division, so that higher efficiency and power density can be realized in the wide-range voltage regulation; and, can adjust the number of inverter circuit and rectifier circuit according to the circuit demand.
Description
Technical Field
The invention relates to a converter, in particular to a converter with a wide voltage regulation range.
Background
In the conventional voltage regulating circuit, as shown in fig. 1, in a two-stage scheme in which a direct current transformer and a DC/DC voltage regulating circuit are cascaded, all output power flows through a two-stage converter, so that the overall loss is high, and the improvement of the power density and efficiency of the converter is limited due to the wide range and the large second-volt inductance in the circuit of the DC/DC voltage regulating circuit; as shown in fig. 2, the output voltage is regulated by the single-stage isolated DC/DC regulator circuit, and a high efficiency can be achieved only at a specific operating voltage, but when the operating voltage of the circuit deviates from the specific operating voltage, the efficiency of the converter is significantly reduced, and the efficiency of the converter decreases as the operating voltage deviates further.
Disclosure of Invention
Aiming at the defects of high voltage bearing capacity and low converter efficiency of elements in the prior art, the invention provides the converter with the wide voltage regulation range, which can improve the working efficiency.
In order to solve the technical problems, the invention is solved by the following technical scheme:
a converter with a wide voltage regulation range comprises a first inverter circuit and a primary winding which are positioned on the primary side of the converter, a first rectifying circuit and a secondary winding which are positioned on the secondary side of the converter, and a DC/DC voltage regulation circuit; the DC/DC voltage regulating circuit is connected to one end of the first inverter circuit or/and the first rectifying circuit in series; the DC/DC voltage regulating circuit connected with the first inverter circuit in series is connected with at least two second inverter circuits in parallel; the DC/DC voltage regulating circuit connected with the first rectifying circuit in series is connected with at least two second rectifying circuits in parallel.
Furthermore, one end of the first inverter circuit is connected in series with the DC/DC voltage regulating circuit, the input end of the first inverter circuit is connected with a capacitor, the input end of the DC/DC voltage regulating circuit is connected with a capacitor, the DC/DC voltage regulating circuit is connected in parallel with at least two second inverter circuits, and the input end of each second inverter circuit is connected with a capacitor; and the output ends of the first inverter circuit and the second inverter circuit are connected with corresponding windings.
Furthermore, one end of the first rectifying circuit is connected with the DC/DC voltage regulating circuit in series, the output end of the first rectifying circuit is connected with a capacitor, the output end of the DC/DC voltage regulating circuit is connected with a capacitor, the DC/DC voltage regulating circuit is connected with at least two second rectifying circuits in parallel, and the output end of each second rectifying circuit is connected with a capacitor; and the input ends of the first rectifying circuit and the second rectifying circuit are connected with corresponding windings.
Furthermore, the first inverter circuit is connected with a plurality of DC/DC voltage regulating circuits in series, and the first rectifying circuit is connected with a plurality of DC/DC voltage regulating circuits in series.
Further, the DC/DC voltage regulating circuit is a voltage reducing circuit, a voltage boosting circuit or a voltage boosting circuit.
Further, the first inverter circuit and the second inverter circuit are half-bridge inverter circuits, full-bridge inverter circuits or push-pull inverter circuits.
Further, the first rectifying circuit and the second rectifying circuit are a center-tapped rectifying circuit, a voltage-doubler rectifying circuit or a full-bridge rectifying circuit.
Furthermore, the buck circuit, the boost circuit and the buck-boost circuit respectively comprise a filter inductor and a plurality of groups of half-bridge circuits or full-bridge circuits.
Furthermore, the first inverter circuit, the second inverter circuit, the first rectifying circuit, the second rectifying circuit and the DC/DC voltage regulating circuit all comprise power tubes, and the types of the power tubes are MOSFET, IGBT, HEMT, IGCT, GTO, GTR, thyristor or diode.
Further, the primary winding is connected in parallel with the primary windings of other converters, or the first inverter circuit is connected in parallel with the input sides of the first inverter circuits of other converters, or the input side of the second inverter circuit is connected in parallel with the input sides of the second inverter circuits of other converters; the secondary winding is connected with secondary windings of other converters in parallel, or the output side of the first rectifying circuit is connected with the output side of a first rectifying circuit of other converters in parallel, or the output side of the second rectifying circuit is connected with the output side of a second rectifying circuit of other converters in parallel, so that the plurality of converters work together.
Due to the adoption of the technical scheme, the invention has the following advantages:
according to the invention, the input voltage or the output voltage is connected in parallel with the DC/DC voltage regulating circuit by utilizing a plurality of inverter circuits, or a plurality of rectifying circuits are connected in parallel with the DC/DC voltage regulating circuit for voltage division, and the voltage regulating part introduced at the input end or the output end can respectively carry out wide-range regulation at the input end or the output end according to the actual input or output requirements, so that higher efficiency and power density can be realized in wide-range voltage regulation compared with the existing converter; and according to the circuit requirements, a proper voltage regulating circuit can be selected or the number of the inverter circuit and the rectifying circuit can be changed, so that the voltage regulation can be more flexibly carried out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a prior art converter;
FIG. 2 is another prior art converter;
FIG. 3 is a wide voltage regulation range converter disclosed in embodiment 1;
FIG. 4 is a sequential variation of FIG. 3 for the wide pressure regulation range disclosed in example 1;
FIG. 5 is a wide voltage regulation range converter disclosed in embodiment 2;
FIG. 6 is a wide voltage regulation range converter disclosed in embodiment 3;
FIG. 7 is a wide voltage regulation range converter disclosed in embodiment 4;
FIG. 8 is a wide voltage regulation range converter disclosed in embodiment 5;
FIG. 9 is a buck-type circuit of the DC/DC regulator circuit;
FIG. 10 is a boost type circuit of the DC/DC regulator circuit;
fig. 11 is a wide voltage regulation range converter disclosed in embodiment 6.
Detailed Description
The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Example 1
As an embodiment, as shown in fig. 3, a converter with a wide voltage regulation range includes an inverter circuit inv and a primary winding P on the primary side of the converter, a capacitor is connected to the input terminal of the inverter circuit inv, and a rec.b rectifier circuit, a DC/DC regulator circuit, a rec.a1 rectifier circuit, and a rec.an rectifier circuit on the secondary side of the converter. The input end of the Rec.B rectifying circuit is connected with the winding S BThe output end is connected with a capacitor COB. The DC/DC voltage regulating circuit is connected in parallel with a Rec.A1 rectifying circuit and a Rec.an rectifying circuit, and a winding SA1And SAnAnd the output ends of the rectification circuit Rec.A1 and the rectification circuit Rec.An are respectively connected with an output capacitor.
DC/DC voltage regulating circuit is connected in parallel with capacitor COCAnd connected with output end OB of Rec.B rectifier circuit by COCAnd COBSeries connection bears output voltage Vo。
The DC/DC voltage regulating circuit in this embodiment may also be connected in parallel with more than two rectifying circuits, each of which is connected with a capacitor.
As shown in fig. 4, the rec.b rectifying circuit and the DC/DC voltage regulating circuit in this embodiment may also switch positions, and the output capacitor C of the rec.b rectifying circuit is usedOBOutput ground SGND, COCThen serially connected to an output capacitor C of the DC/DC converterOCFinally to output VoThe positive terminal of (a).
The DC/DC voltage regulator circuit in this embodiment may be a step-down circuit as shown in fig. 9, or may be replaced with a step-up circuit or a step-up/step-down circuit.
Example 2
As an embodiment, as shown in fig. 5, a converter with a wide voltage regulation range includes an inverter circuit inv and a primary winding P on the primary side of the converter, a capacitor is connected to the input terminal of the inverter circuit inv, and a rec.b rectifier circuit, a DC/DC voltage regulation circuit, and four rectifier circuits on the secondary side of the converter. The Rec.B rectifier circuit is connected in series with two DC/DC regulator circuits, which are designated DC/DC1 and DC/DC2, respectively. The DC/DC1 voltage regulating circuit is at least connected with a Rec.A1 rectifying circuit and a Rec.Am rectifying circuit in parallel, the windings SA1 and SAm are respectively connected with the corresponding rectifying circuit Rec.A1 and the rectifying circuit Rec.Am, and the output ends of the rectifying circuit Rec.A1 and the rectifying circuit Rec.Am are respectively connected with an output capacitor.
The DC/DC2 voltage regulator circuit is at least connected in parallel with Rec.An rectifier circuit and Rec.An1 rectifier circuit, and winding SAnAnd SAn1And the output ends of the rectification circuit Rec.An and the rectification circuit Rec.An1 are respectively connected with an output capacitor.
Then the output ground is firstly connected to an output capacitor C of the DC/DC1 circuitOC1，COC1Then serially connected to an output capacitor C of the rectification circuit Rec.BOB，COBAn output capacitor C connected in series with the DC/DC2 circuitOC2Finally to output VoThe positive terminal of (a).
Example 3
A converter with wide voltage regulation range, as shown in FIG. 6, comprises a rectification circuit Rec on the secondary side of the converter andand the output ends of the secondary winding S and the rectifying circuit Rec are connected with a capacitor, and an Inv.B inverter circuit, a DC/DC voltage regulating circuit, an inverter circuit Inv.A1 and an inverter circuit Inv.An which are positioned on the primary side of the converter. The output end of the Inv.B inverter circuit is connected with a winding PBThe input end is connected with a capacitor CInB. The DC/DC voltage regulator circuit is connected in parallel with Inv.A1 inverter circuit and Inv.An inverter circuit, and winding PA1And a winding PAnThe inverter circuits Inv.A1 and Inv.An are respectively connected with corresponding inverter circuits, the input ends of the inverter circuits Inv.A1 and Inv.An are connected in parallel to the same DC/DC voltage regulating circuit, and a capacitor is connected between each inverter circuit and the DC/DC voltage regulating circuit.
The DC/DC voltage regulating circuit is connected in parallel with a capacitor CInCAnd is connected with input end In of Inv.B inverter circuitBAre connected by CInBAnd CInCIn series to carry the input voltage Vin。
The DC/DC voltage regulating circuit in this embodiment may also be connected in parallel with more than two inverter circuits, each inverter circuit being connected with a capacitor.
The DC/DC voltage regulator circuit in this embodiment may be a boost type circuit as shown in fig. 10, or may be replaced with a buck type circuit or a boost type circuit.
Example 4
As an example, as shown in FIG. 7, a converter with wide voltage regulation range comprises an Inv.B inverter circuit and a DC/DC inverter circuit on the primary side of the converterInA voltage regulator circuit, an inverter circuit Inv.A1 and Inv.An, and a Rec.B rectifier circuit and a DC/DC converter at the secondary side of the converterOutVoltage regulating circuit, Rec.A1 rectifier circuit, Rec.an rectifier circuit. The output end of the Inv.B inverter circuit is connected with a winding PBThe input end is connected with a capacitor CInB。DC/DCInThe regulator circuit is connected in parallel with Inv.A1 inverter circuit and Inv.An inverter circuit, and winding PA1And a winding PAnThe inverter circuits Inv.A1 and Inv.An are respectively connected with corresponding inverter circuits, and the input ends of the inverter circuits Inv.A1 and Inv.An are connected in parallel to the same DC/DCInVoltage regulating circuit, and each inverter circuit and DC/DC InCapacitors are connected between the voltage regulating circuits.
DC/DCInThe voltage regulating circuit is connected in parallel with a capacitor CInCAnd is connected to input terminal In of Inv.B inverter circuitBIs connected by CInBAnd CInCIn series to carry the input voltage Vin。
The input end of the Rec.B rectifying circuit is connected with the winding SBThe output end is connected with a capacitor COB。DC/DCOutThe voltage regulating circuit is connected with a Rec.A1 rectifying circuit and a Rec.an rectifying circuit in parallel, and a winding SA1And SAnAnd the output ends of the rectification circuit Rec.A1 and the rectification circuit Rec.An are respectively connected with an output capacitor.
DC/DCOutThe voltage regulating circuit is connected in parallel with a capacitor COCAnd is connected with the output end O of the Rec.B rectification circuitBIs connected by COCAnd COBSeries connection bears output voltage Vo。
DC/DC in the present embodimentInThe voltage regulating circuit can also be connected with more than two inverter circuits in parallel, and each inverter circuit is connected with a capacitor; DC/DCOutThe voltage regulating circuit can also be connected with more than two rectifying circuits in parallel, and each rectifying circuit is connected with a capacitor.
Example 5
As an embodiment, as shown in fig. 8, a converter with a wide voltage regulation range includes an inverter circuit inv and a primary winding P on the primary side of the converter, a capacitor is connected to an input terminal of the inverter circuit inv, and a rec.b rectifier circuit, a DC/DC regulator circuit, a rec.a1 rectifier circuit, and a rec.an rectifier circuit on the secondary side of the converter. The input end of the Rec.B rectifying circuit is connected with the winding S BThe output end is connected with a capacitor COB. The DC/DC voltage regulating circuit is connected in parallel with a Rec.A1 rectifying circuit and a Rec.an rectifying circuit, and a winding SA1And SAnAnd the output ends of the rectification circuit Rec.A1 and the rectification circuit Rec.An are respectively connected with an output capacitor.
As shown by the dashed line box (FIG. 9 is an enlarged view of the circuit in the dashed line box), the DC/DC voltage regulating circuit is a multi-level Buck Buck circuit, which includes two groups of half-bridge circuits, and the bridge arm of the half-bridge circuit RAnThe midpoint of the capacitor is connected to an output capacitor C of the DC/DC voltage regulating circuit via an inductor LCAnd is connected with the output end O of the Rec.B rectification circuitBIs connected by CCAnd CBSeries connection bears output voltage VoOutput O of half-bridge circuit RA1A1To the output ground SGND of the entire converter.
The power transistor type in the half-bridge circuit in this embodiment may be MOSFET, IGBT, HEMT, IGCT, GTO, GTR, thyristor or diode.
In this embodiment, the DC/DC voltage regulating circuit may include two or more sets of half-bridge circuits, a bridge arm midpoint of the first half-bridge circuit is connected to an output point of the rec.b rectifier circuit through the inductor L, a half-bridge of the previous half-bridge circuit is connected to a bridge arm midpoint of the next half-bridge circuit with reference to the ground, and a half-bridge of the last half-bridge circuit is connected to the final output ground SGND with reference to the ground.
Example 6
As shown in fig. 11, this embodiment is one of the specific structures of fig. 3 in embodiment 1. The inverter circuit Inv on the primary side of the converter comprises a half-bridge circuit and an inductor LrAnd a capacitor Cr. Bridge arm midpoint inductance L of half-bridge circuitrAnd the primary winding P is connected with a reference ground of the half-bridge circuit through a capacitor Cr to form a loop. The inverter circuit on the primary side may be formed by connecting the plurality of inverter circuits inv in series. The Rec.B rectifier circuit on the secondary side of the converter comprises a half-bridge circuit and a resonant circuit consisting of an inductor and a capacitor. The middle point of a bridge arm of the half-bridge circuit is connected with a winding SB through an inductor and is connected with a half-bridge reference forming loop of the half-bridge circuit through a capacitor to form a rectifying circuit.
The rectification circuit Rec.A1 and the rectification circuit Rec.an respectively comprise a half-bridge circuit and a corresponding resonance circuit, and the middle point of a bridge arm of the half-bridge circuit is connected with a winding through an inductor and is connected with a half-bridge reference of the half-bridge circuit through a capacitor to form a loop to form a rectification circuit.
The DC/DC voltage regulating circuit comprises two half-bridge circuits, wherein the middle point of a bridge arm of the first half-bridge circuit is connected to an output capacitor of the DC/DC voltage regulating circuit through an inductor and is connected with the output end of the Rec.B rectifying circuit, the half-bridge of the first half-bridge circuit is connected with the middle point of the bridge arm of the second half-bridge circuit in a reference ground mode, and the half-bridge of the second half-bridge circuit is connected with the output ground SGND of the whole converter in a reference ground mode.
In all the above embodiments, the primary winding is connected in parallel with the primary windings of other converters, or the first inverter circuit is connected in parallel with the input sides of the first inverter circuits of other converters, or the input side of the second inverter circuit is connected in parallel with the input sides of the second inverter circuits of other converters; the secondary winding is connected with the secondary winding of other converters in parallel, or the output side of the first rectifying circuit is connected with the output side of the first rectifying circuit of other converters in parallel, or the output side of the second rectifying circuit is connected with the output side of the second rectifying circuit of other converters in parallel, so that the plurality of converters work together.
The above-described embodiments are merely illustrative. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement without inventive effort.
The foregoing is illustrative of the present disclosure and it will be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles of the disclosure, the scope of which is defined by the appended claims.
Claims (9)
1. A converter with a wide voltage regulation range is characterized by comprising a first inverter circuit and a first primary winding which are positioned on the primary side of the converter, a first rectifier circuit and a first secondary winding which are positioned on the secondary side of the converter, and a DC/DC voltage regulation circuit, wherein the DC/DC voltage regulation circuit is a multi-level circuit which comprises at least two filter capacitors;
the DC/DC voltage regulating circuit is connected in series to one end of the first inverter circuit or/and the first rectifying circuit;
the DC/DC voltage regulating circuit connected with the first inverter circuit in series is connected with at least two second inverter circuits, the input ends of the at least two second inverter circuits are correspondingly connected with at least two filter capacitors of the DC/DC voltage regulating circuit in parallel, and the output ends of the at least two second inverter circuits are connected with the input ends of the corresponding second primary windings;
the DC/DC voltage regulating circuit connected with the first rectification circuit in series is connected with at least two second rectification circuits, the input ends of the at least two second rectification circuits are connected with the output ends of the corresponding second secondary windings, and the output ends of the at least two second rectification circuits are connected with at least two filter capacitors of the DC/DC voltage regulating circuit in parallel correspondingly.
2. The wide voltage regulation range converter according to claim 1, wherein one end of the first inverter circuit is connected in series with the DC/DC voltage regulation circuit, an input end of the first inverter circuit is connected with a capacitor, an input end of the DC/DC voltage regulation circuit is connected with a capacitor, the DC/DC voltage regulation circuit is connected in parallel with at least two second inverter circuits, and an input end of each second inverter circuit is connected with a capacitor; and the output ends of the first inverter circuit and the second inverter circuit are connected with corresponding primary windings.
3. The wide-voltage-regulation-range converter according to any one of claims 1 or 2, wherein one end of the first rectifying circuit is connected in series with the DC/DC voltage-regulating circuit, an output end of the first rectifying circuit is connected with a capacitor, an output end of the DC/DC voltage-regulating circuit is connected with a capacitor, the DC/DC voltage-regulating circuit is connected with at least two second rectifying circuits in parallel, and an output end of each second rectifying circuit is connected with a capacitor; and the input ends of the first rectifying circuit and the second rectifying circuit are connected with corresponding secondary windings.
4. The wide voltage regulation range converter of claim 1, wherein the first inverter circuit is connected in series with a plurality of DC/DC regulator circuits, and the first rectifier circuit is connected in series with a plurality of DC/DC regulator circuits.
5. The wide voltage regulation range converter according to any one of claims 1 or 2, wherein the first inverter circuit and the second inverter circuit are half-bridge inverter circuits, full-bridge inverter circuits, or push-pull inverter circuits.
6. The wide voltage regulation range converter of claim 3, wherein the first rectification circuit and the second rectification circuit are center-tapped rectification circuits, voltage doubler rectification circuits, or full-bridge rectification circuits.
7. The wide voltage regulation range converter of claim 1, wherein the DC/DC voltage regulation circuit comprises a filter inductor and a plurality of sets of half-bridge or full-bridge circuits.
8. The converter with wide voltage regulation range according to claim 1, wherein the first and second inverter circuits, the first and second rectifier circuits and the DC/DC voltage regulation circuit each comprise a power tube, and the power tube is of a MOSFET, an IGBT, a HEMT, an IGCT, a GTO, a GTR, a thyristor or a diode type.
9. The wide voltage regulation range converter according to claim 1, wherein the primary winding is connected in parallel with the primary windings of the other converters, or the first inverter circuit is connected in parallel with the input sides of the first inverter circuits of the other converters, or the input sides of the second inverter circuits are connected in parallel with the input sides of the second inverter circuits of the other converters; the secondary winding is connected with secondary windings of other converters in parallel, or the output side of the first rectifying circuit is connected with the output side of a first rectifying circuit of other converters in parallel, or the output side of the second rectifying circuit is connected with the output side of a second rectifying circuit of other converters in parallel, so that the plurality of converters work together.
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Citations (7)
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