CN101873067B - High-frequency transformer delta-star connected high-gain DC converter - Google Patents
High-frequency transformer delta-star connected high-gain DC converter Download PDFInfo
- Publication number
- CN101873067B CN101873067B CN 201010204698 CN201010204698A CN101873067B CN 101873067 B CN101873067 B CN 101873067B CN 201010204698 CN201010204698 CN 201010204698 CN 201010204698 A CN201010204698 A CN 201010204698A CN 101873067 B CN101873067 B CN 101873067B
- Authority
- CN
- China
- Prior art keywords
- frequency
- phase transformer
- power switch
- winding
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a high-frequency transformer delta-star connected high-gain DC converter comprising six power switch tubes, an input filter capacitor, an output filter inductor, an output filter capacitor, six rectifier diodes and a high-frequency three-phase transformer, wherein a winding of the high-frequency three-phase transformer is in delta/Y connection. The invention realizes the output boosting by utilizing the intrinsic characteristics of the delta/Y connected high-frequency three-phase transformer, can achieve the high grain of output voltage by combining with the proper turn ratio of the high-frequency three-phase transformer; a primary side is a three-phase bridge type power conversion circuit, the three-phase bridge type power conversion circuit respectively dislocates phases at 120 degrees, the upper and the lower power switch tubes work complementarily and symmetrically, and the primary side bridge type circuit and a secondary side three-phase rectifier diode can realize three-phase cross parallel-connected effect so as to decrease input current ripples and output current ripples, enable the heat distribution of power devices to be equalized and enhance the reliability of the converter.
Description
Technical field
The present invention relates to a kind of DC-DC converter, specifically the high-gain DC converter of boost converter with delta-star connection type high-frequency transformer.
Background technology
Conventional full-bridge type DC-DC converter, comprise a high frequency transformer, four power switch pipes, and four output rectifier diodes, the source electrode of the first power switch pipe links to each other with the drain electrode of the second power switch pipe and former limit winding one end of high frequency transformer, the source electrode of the 3rd power switch pipe links to each other with the drain electrode of the 4th power switch pipe and the former limit winding other end of high frequency transformer, the negative electrode of the first diode links to each other with the anode of the second diode and an end of high frequency transformer secondary winding, and the negative electrode of the 3rd diode links to each other with the anode of the 4th diode and the other end of high frequency transformer secondary winding.This isolated DC-DC converter output voltage gain is less, because the turn ratio of transformer is larger, thereby the due to voltage spikes of power switch pipe is larger, power switch pipe is hard switching work, switching loss is larger, the voltage stress of output rectifier diode is larger, and the reverse recovery current of diode is larger, and reverse recovery loss is larger.In recent years, some high-gain DC-DC transfer circuit have in succession been studied, mainly contain two classes: a class is Push-pull Forward Converter, a kind of isolated form push-pull converter in essence, this converter is the distortion of basic buck convertor, still need to rely on the turn ratio of high frequency transformer to realize high gain voltage output, because the leakage inductance of transformer is larger, have equally the similar switching loss of full-bridge converter, reverse recovery loss etc.; Another kind of is the two-stage type power inverter, be basic boost converter such as prime, rear class is the open loop bridge converter, the rear class converter is equivalent to electronic transformer under this situation, the two-stage type power inverter may be realized the high-gain output voltage, but there are five power switch pipes, five output rectifier diodes in the whole transformation topology, thereby under the low pressure input condition, still have switching loss that leakage inductance causes, and reverse recovery loss.Although these two types of high-gain isolated DC-DC converter realize high gain voltage output by the very high transformer turn ratio, but the applied power circuit is complicated, and there is larger leakage inductance in high turn ratio transformer, thereby can not reduce power switch pipe, output rectifier diode voltage stress, limited the further lifting of converter operating efficiency.
Summary of the invention
The high-gain that the purpose of this invention is to provide output voltage, the input current ripple is little, and output current ripple is little, and is simple in structure, and realizes the isolated DC transducer of the boost converter with delta-star connection type high-frequency transformer of high-gain.
The high-gain DC converter of boost converter with delta-star connection type high-frequency transformer of the present invention, comprise six power switch pipes, six output rectifier diodes, an input filter capacitor, an output inductor, an output filter capacitor, and a high-frequency three-phase transformer, the former limit winding of high-frequency three-phase transformer is that delta connection, secondary winding are star connection, Y connection.The source electrode of the first power switch pipe links to each other with the drain electrode of the 4th power switch pipe and an end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 3rd power switch pipe links to each other with the drain electrode of the 6th power switch pipe and the other end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 5th power switch pipe links to each other with the drain electrode of the second power switch pipe and last end of the former triangle edge winding of high-frequency three-phase transformer, the anode of the first rectifier diode links to each other with the negative electrode of the 4th rectifier diode and an end of high-frequency three-phase transformer secondary star connection, Y connection winding, the anode of the 3rd rectifier diode links to each other with the negative electrode of the 6th rectifier diode and the other end of high-frequency three-phase transformer secondary star connection, Y connection winding, and the anode of the 5th rectifier diode links to each other with the negative electrode of the second rectifier diode and last end of high-frequency three-phase transformer secondary star connection, Y connection winding.
Former limit is the three-phase bridge power conversion circuit, 120 ° of bridge-type power circuit difference misphases, and upper and lower power switch pipe mutual symmetry work, thereby the secondary star winding obtain with the identical voltage of the former limit of magnetic post winding, behind secondary three-phase diode rectification circuit, can realize the effect of similar three-phase alternating current rectification, can obtain one group of trapezoidal wave voltage at the transformer secondary, even the circle of high-frequency three-phase transformer is smaller, still can obtain higher output voltage.
The present invention has utilized Δ/Y connection high-frequency three-phase transformer to realize exporting and boost, and can reach the high-gain of output voltage in conjunction with the suitable turn ratio of transformer; Can by the output star winding connected mode different from output loading, can obtain one group of positive output voltage or positive and negative two groups of output voltages at output neatly; Former limit bridge circuit and secondary three phase rectifier diode can be realized the effect of three-phase crisscross parallel, thereby reduce the input current ripple, and output current ripple, and make the power device heat distribution balanced, improve the reliability of converter.
The present invention compared with prior art has following advantage and effect: the present invention utilizes the concept of high-frequency three-phase transformer, and realizes the output of secondary staircase waveform by the mode that Transformer Winding Δ-Y connects, thereby reaches the high step-up ratio of output voltage; Simultaneously, former limit bridge-type power circuit and secondary three phase rectifier diode can be realized the effect of three-phase crisscross parallel, thereby reduce the input current ripple, and output current ripple, and make the power device heat distribution balanced, improve the reliability of power inverter.
Description of drawings
Fig. 1 is the circuit diagram of the high-gain DC converter of a kind of boost converter with delta-star connection type high-frequency transformer of the present invention;
Fig. 2 is the circuit diagram of the high-gain DC converter of another kind of boost converter with delta-star connection type high-frequency transformer of the present invention;
Fig. 3 is the steady operation oscillogram of the high-gain DC converter of boost converter with delta-star connection type high-frequency transformer of the present invention.
Embodiment
Referring to Fig. 1, the high-gain DC converter of boost converter with delta-star connection type high-frequency transformer of the present invention, comprise six power switch pipe Q1, Q2, Q3, Q4, Q5, Q6, export rectifier diode D1, D2, D3, D4, D5, D6 for six, an input filter capacitor Cin, an output inductor Lout, an output filter capacitor Cout, and a high-frequency three-phase transformer TX1, the former limit winding of high-frequency three-phase transformer is that delta connection, secondary winding are star connection, Y connection.The source electrode of Q1 links to each other with an end of the drain electrode of Q4 and the former triangle edge winding of high-frequency three-phase transformer, the source electrode of Q3 links to each other with the other end of the drain electrode of Q6 and the former triangle edge winding of high-frequency three-phase transformer, the source electrode of Q5 links to each other with last end of the drain electrode of Q2 and the former triangle edge winding of high-frequency three-phase transformer, the anode of D1 links to each other with an end of the negative electrode of D4 and high-frequency three-phase transformer secondary star connection, Y connection winding, the anode of D3 links to each other with the other end of the negative electrode of D6 and high-frequency three-phase transformer secondary star connection, Y connection winding, and the anode of D5 links to each other with last end of the negative electrode of D2 and high-frequency three-phase transformer secondary star connection, Y connection winding.
Perhaps also can be as shown in Figure 2, the former limit connected mode of high-frequency three-phase transformer is constant, and link to each other with the mid point of two output capacitance Cout1, Cout2 from the mid point of high-frequency three-phase transformer secondary star connection, Y connection winding, output inductor is become two simultaneously, be respectively Lout1, Lout2, can obtain positive and negative two groups of output voltages at output.
The duty ratio of power switch pipe is 0.5 o'clock, and in the complete work period, there are six operation modes (Fig. 1 is identical with the course of work of converter shown in Figure 2) in the high-gain DC converter of boost converter with delta-star connection type high-frequency transformer, as shown in Figure 3.
T0～t1: power switch pipe Q1, Q6, Q5 conducting, A point voltage are input voltage V
In, the B point voltage is zero, the C point voltage is input voltage V
InSo, V
AB=V
In, V
BC=-V
In, V
CA=0, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN, N=Ns/Np, Np are the number of turns of transformer primary side winding; Ns is the number of turns of transformer secondary winding.Therefore, can obtain V
Ab=2V
InN, V
Bc=-V
InN, V
Ca=-V
InN is because V
AbAbsolute value the highest, so secondary rectifier diode D1, D6 conducting, output voltage during this period of time is V
Out=2V
InN.
T1～t2: power switch pipe Q2, Q1, Q6 conducting, A point voltage are input voltage V
In, the B point voltage is zero, the C point voltage is input voltage zero, so V
AB=V
In, V
BC=0, V
CA=-V
In, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN.Therefore, can obtain V
Ab=V
InN, V
Bc=V
InN, V
Ca=-2V
InN is because V
CaAbsolute value the highest, so secondary rectifier diode D2, D1 conducting, output voltage during this period of time is V
Out=2V
InN.
T2～t3: power switch pipe Q3, Q2, Q1 conducting, A point voltage are input voltage V
In, the B point voltage is input voltage V
In, the C point voltage is zero, so V
AB=0, V
BC=V
In, V
CA=-V
In, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN.Therefore, can obtain V
Ab=-V
InN, V
Bc=2V
InN, V
Ca=-V
InN is because V
BcAbsolute value the highest, so secondary rectifier diode D3, D2 conducting, output voltage during this period of time is V
Out=2V
InN.
T3～t4: power switch pipe Q4, Q3, Q2 conducting, A point voltage are zero, and the B point voltage is input voltage V
In, the C point voltage is zero, so V
AB=-V
In, V
BC=V
In, V
CA=0, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN.Therefore, can obtain V
Ab=-2V
InN, V
Bc=V
InN, V
Ca=V
InN is because V
AbAbsolute value the highest, so secondary rectifier diode D4, D3 conducting, output voltage during this period of time is V
Out=2V
InN.
T4～t5: power switch pipe Q5, Q4, Q3 conducting, A point voltage are zero, and the B point voltage is input voltage V
In, the C point voltage is input voltage V
InSo, V
AB=-V
In, V
BC=0, V
CA=V
In, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN.Therefore, can obtain V
Ab=-V
InN, V
Bc=-V
InN, V
Ca=2V
InN is because V
CaAbsolute value the highest, so secondary rectifier diode D5, D4 conducting, output voltage during this period of time is V
Out=2V
InN.
T5～t6: power switch pipe Q6, Q5, Q4 conducting, A point voltage are zero, and the B point voltage is zero, and the C point voltage is input voltage V
InSo, V
AB=0, V
BC=-V
In, V
CA=V
In, because V
A0=V
ABN, V
B0=V
BCN, V
C0=V
CAN.Therefore, can obtain V
Ab=V
InN, V
Bc=-2V
InN, V
Ca=V
InN is because V
BcAbsolute value the highest, so secondary rectifier diode D6, D5 conducting, output voltage during this period of time is V
Out=2V
InN.
Can find out that from above analytic process V is arranged all the time in each operation mode
Out=2V
InN, thereby compared to the isolated form DC/DC converter with conventional high frequency transformer, the high-gain DC converter secondary winding of this boost converter with delta-star connection type high-frequency transformer can obtain the voltage trapezoidal wave, thereby can realize multiplication of voltage output, the inherence of Here it is the high-frequency three-phase transformer characteristic of boosting.And the level and smooth commutation course of secondary rectifier diode of the filter inductance Lout of output and filter capacitor Cout reduces output current ripple.
Claims (2)
1. the high-gain DC converter of a boost converter with delta-star connection type high-frequency transformer, it is characterized in that comprising six power switch pipes (Q1, Q2, Q3, Q4, Q5, Q6), six output rectifier diodes (D1, D2, D3, D4, D5, D6), an input capacitance (Cin), an output inductor (Lout), an output filter capacitor (Cout), and a high-frequency three-phase transformer (TX1), the former limit winding of high-frequency three-phase transformer is that delta connection, secondary winding are star connection, Y connection; The source electrode of the first power switch pipe (Q1) links to each other with the drain electrode of the 4th power switch pipe (Q4) and an end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 3rd power switch pipe (Q3) links to each other with the drain electrode of the 6th power switch pipe (Q6) and the other end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 5th power switch pipe (Q5) links to each other with the drain electrode of the second power switch pipe (Q2) and last end of the former triangle edge winding of high-frequency three-phase transformer, the anode of the first rectifier diode (D1) links to each other with the negative electrode of the 4th rectifier diode (D4) and an end of high-frequency three-phase transformer secondary star connection, Y connection winding, the anode of the 3rd rectifier diode (D3) links to each other with the negative electrode of the 6th rectifier diode (D6) and the other end of high-frequency three-phase transformer secondary star connection, Y connection winding, and the anode of the 5th rectifier diode (D5) links to each other with the negative electrode of the second rectifier diode (D2) and last end of high-frequency three-phase transformer secondary star connection, Y connection winding.
2. the high-gain DC converter of a boost converter with delta-star connection type high-frequency transformer, it is characterized in that comprising six power switch pipes (Q1, Q2, Q3, Q4, Q5, Q6), six output rectifier diodes (D1, D2, D3, D4, D5, D6), an input capacitance (Cin), two output inductors (Lout1, Lout2), two output capacitances (Cout1, Cout2), and a high-frequency three-phase transformer (TX1), the former limit winding of high-frequency three-phase transformer is that delta connection, secondary winding are star connection, Y connection; The source electrode of the first power switch pipe (Q1) links to each other with the drain electrode of the 4th power switch pipe (Q4) and an end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 3rd power switch pipe (Q3) links to each other with the drain electrode of the 6th power switch pipe (Q6) and the other end of the former triangle edge winding of high-frequency three-phase transformer, the source electrode of the 5th power switch pipe (Q5) links to each other with the drain electrode of the second power switch pipe (Q2) and last end of the former triangle edge winding of high-frequency three-phase transformer, the anode of the first rectifier diode (D1) links to each other with the negative electrode of the 4th rectifier diode (D4) and an end of high-frequency three-phase transformer secondary star connection, Y connection winding, the anode of the 3rd rectifier diode (D3) links to each other with the negative electrode of the 6th rectifier diode (D6) and the other end of high-frequency three-phase transformer secondary star connection, Y connection winding, and the anode of the 5th rectifier diode (D5) links to each other with the negative electrode of the second rectifier diode (D2) and last end of high-frequency three-phase transformer secondary star connection, Y connection winding; Link to each other with the mid point of two output capacitance Cout1, Cout2 from the mid point of high-frequency three-phase transformer secondary star connection, Y connection winding, obtain positive and negative two groups of output voltages at output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010204698 CN101873067B (en) | 2010-06-18 | 2010-06-18 | High-frequency transformer delta-star connected high-gain DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010204698 CN101873067B (en) | 2010-06-18 | 2010-06-18 | High-frequency transformer delta-star connected high-gain DC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101873067A CN101873067A (en) | 2010-10-27 |
| CN101873067B true CN101873067B (en) | 2013-03-20 |
Family
ID=42997772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010204698 Expired - Fee Related CN101873067B (en) | 2010-06-18 | 2010-06-18 | High-frequency transformer delta-star connected high-gain DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101873067B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790533A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Multi-phase alternating resonant converter |
| CN103138583A (en) * | 2011-11-24 | 2013-06-05 | 深圳古瑞瓦特新能源有限公司 | Direct current converting circuit and isolated converter |
| CN112787521B (en) | 2019-11-08 | 2022-06-28 | 台达电子企业管理（上海）有限公司 | Power conversion device and power supply system |
| KR20210064958A (en) * | 2019-11-26 | 2021-06-03 | 엘지이노텍 주식회사 | DC-DC Converter |
| CN114553026A (en) * | 2022-01-26 | 2022-05-27 | 张逸兴 | Power supply circuit and application thereof |
| WO2024056744A1 (en) | 2022-09-14 | 2024-03-21 | Fronius International Gmbh | Electric dc-to-dc converter for converting an input dc voltage into an output dc voltage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558539A (en) * | 2004-01-19 | 2004-12-29 | 南京航空航天大学 | Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit |
| CN201699588U (en) * | 2010-06-18 | 2011-01-05 | 华南理工大学 | High-gain DC converter of high-frequency transformer with delta-shaped and Y-shaped winding coupling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245074B1 (en) * | 2000-01-05 | 2010-06-09 | DET International Holding Limited | Three phase-electrical intermediate circuit having reduced network feedback-identical pulse-director system with a wide positioning range pertaining to the output voltage |
-
2010
- 2010-06-18 CN CN 201010204698 patent/CN101873067B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1558539A (en) * | 2004-01-19 | 2004-12-29 | 南京航空航天大学 | Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit |
| CN201699588U (en) * | 2010-06-18 | 2011-01-05 | 华南理工大学 | High-gain DC converter of high-frequency transformer with delta-shaped and Y-shaped winding coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101873067A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Alzahrani et al. | A family of scalable non-isolated interleaved DC-DC boost converters with voltage multiplier cells | |
| Tang et al. | Hybrid switched-inductor converters for high step-up conversion | |
| US8737093B1 (en) | Power converter with quasi-resonant voltage multiplier having shared switching node | |
| CN107517003B (en) | Output-floating-input parallel high-gain Boost conversion circuit and switching method | |
| Forouzesh et al. | A survey on voltage boosting techniques for step-up DC-DC converters | |
| CN101873067B (en) | High-frequency transformer delta-star connected high-gain DC converter | |
| CN101895198B (en) | Current feed three-inductor boost converter of high frequency transformer connected in delta/Y shape | |
| US11569746B2 (en) | DC coupled electrical converter | |
| Berkovich et al. | High step-up DC-DC converter based on the switched-coupled-inductor boost converter and diode-capacitor multiplier | |
| Siwakoti et al. | Power electronics converters—An overview | |
| Chewale et al. | A review on isolated and non-isolated DC-DC converter for PV application | |
| Al Hysam et al. | New topologies of Cuk PFC converter with switched capacitor for low power applications | |
| CN103986360B (en) | High-frequency isolation type boost type three-level inverter | |
| Alishah et al. | Analysis and design of a new extendable SEPIC converter with high voltage gain and reduced components for photovoltaic applications | |
| CN103780087B (en) | A kind of Zero voltage transition pulse width modulated inverter | |
| Lee et al. | Parallel operation of trans-Z-source network full-bridge dc-dc converter for wide input voltage range | |
| CN201699588U (en) | High-gain DC converter of high-frequency transformer with delta-shaped and Y-shaped winding coupling | |
| CN101867304A (en) | Secondary side rectification circuit using DC converter of high-frequency three-phase transformer | |
| Saifullah et al. | Bridgeless AC-DC buck-boost converter with switched capacitor for low power applications | |
| Arshadi et al. | New high step-up DC-DC converter for photovoltaic grid-connected applications | |
| CN201699589U (en) | Current feeding three-inducer boost converter with delta-star connection type high-frequency transformer | |
| TW201322611A (en) | Non-isolated single-phase multi-level inverter system for renewable energy applications | |
| Ahmed et al. | Design and Implementation of High Gain SEPIC Converter | |
| Chang et al. | A high-gain serial-parallel-switched-capacitor coupled-inductor boost DC-AC inverter | |
| Lei et al. | Nonisolated high step-up soft-switching DC-DC converter integrating Dickson switched-capacitor techniques |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20140618 |
|
| EXPY | Termination of patent right or utility model |