CN203775030U - DC-module-used high-voltage-boost-ratio converter based on coupling inductors - Google Patents
DC-module-used high-voltage-boost-ratio converter based on coupling inductors Download PDFInfo
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- CN203775030U CN203775030U CN201320889155.6U CN201320889155U CN203775030U CN 203775030 U CN203775030 U CN 203775030U CN 201320889155 U CN201320889155 U CN 201320889155U CN 203775030 U CN203775030 U CN 203775030U
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- 238000010168 coupling process Methods 0.000 title claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 30
- 238000004804 winding Methods 0.000 claims abstract description 58
- 230000002459 sustained effect Effects 0.000 claims description 24
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract 4
- 230000006698 induction Effects 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
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- 230000003071 parasitic effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model discloses a DC-module-used high-voltage-boost-ratio converter based on coupling inductors. The converter comprises two main switch tubes, two clamping switch tubes, two freewheeling diodes, two output diodes, two clamping capacitors, two voltage-multiplying capacitors, one output capacitor and two coupling inductors with two windings. The coupling inductors are utilized to expand voltage gain of the converter and reduce voltage stress of a power switch tube and the diodes. Leakage induction of the coupling inductors is utilized to realize zero-voltage turn-on of the switch tubes and inhibit reverse recovery current of the diodes. Voltage peak generated at turn-off of the main switch tubes is effectively absorbed by a clamping circuit formed by the clamping switch tubes and the clamping capacitors so that lossless transfer of energy is realized. Gain of the converter is further enhanced by utilizing a coupling inductor series circuit, and voltage stress of the power switch tube and the output diodes is further reduced. Therefore, circuit structure is simple, control is convenient, and thus the converter is suitable for high-gain and high-efficiency photovoltaic grid-connected power generation and transformation occasions.
Description
Technical field
The utility model relates to a kind of DC-to-DC converter and application, is high step-up ratio converter for a kind of DC Module based on coupling inductance specifically.
Background technology
In solar power system, because the output voltage of monolithic solar cell is lower, and the inversion grid connection required voltage that generates electricity is higher, therefore needs one-level DC-to-DC converter that low voltage and direct current is converted to and is applicable to grid-connected high-voltage direct-current electricity.In distributed solar energy electricity generating plan, the power capacity of monolithic solar cell is less, but having relatively high expectations to efficiency.Therefore how to realize high-gain, high efficiency and single-phase single-grade converter simple in structure, significant for the development that promotes photovoltaic industry.
The voltage gain of conventional crisscross parallel booster type Boost DC-DC converter only determines by duty ratio, and voltage gain is limited, is difficult to meet the conversion requirement of high-gain.The voltage stress of power switch pipe is larger, is difficult to adopt the high performance switching tube of low pressure to reduce conduction loss.And converter is operated in hard switching state, switching loss is larger.In order to realize the soft switch motion of Boost converter, in recent years, some are in succession studied by being attached with the soft switch solution of source power switch or passive device, although these circuit have been realized soft switch motion, but can not reduce the voltage stress of switching tube, can not realize the high-gain conversion of system.For the voltage gain of Lifting Transform device, a kind of scheme is the scheme that adopts switching capacity, but the required switching tube quantity of this scheme is more, has increased system cost; Other scheme is to adopt three complicated winding coupled inductance schemes, and the shortcoming of this scheme is coupling inductance complex structure, is unfavorable for industrial processes, is difficult to ensure the consistency of circuit.
Summary of the invention
The utility model will overcome the above-mentioned shortcoming of prior art, provides a kind of simple in structure, controls the high step-up ratio converter for a kind of DC Module based on coupling inductance of convenient and noenergy loss, wherein:
A high step-up ratio converter for DC Module based on coupling inductance, comprises Boost booster circuit unit, afterflow booster circuit unit and output circuit unit, comprising:
Converter Boost booster circuit unit in, the first end of the first winding is connected with the first end of the second winding and the positive pole of power supply, the second end of the first winding is connected with the drain electrode of the first switching tube, the second end of the second winding is connected with the drain electrode of second switch pipe, the source electrode of the first switching tube is connected with the source electrode of second switch pipe and the negative pole of power supply, the source electrode of the first clamp switch pipe is connected with the drain electrode of the first switching tube, the drain electrode of the first clamp switch pipe is connected with the first end of the first clamping capacitance, the source electrode of the second clamp switch pipe is connected with the drain electrode of second switch pipe, the drain electrode of the second clamp switch pipe is connected with the first end of the second clamping capacitance, the second end of the first clamping capacitance is connected with the second end of the second clamping capacitance and the negative pole of power supply,
The afterflow booster circuit unit of current transformer comprises,
A) windings in series branch road, formed by the tertiary winding and the 4th windings in series, wherein the first winding and the tertiary winding are all two windings in a coupling inductance, the second winding and the 4th winding are all two windings in another coupling inductance, hold as reference taking the first end of the first winding and the first end of the second winding, the tertiary winding is connected with Same Name of Ends or different name end with reference to end in the 4th winding;
B) the first fly-wheel diode being connected with windings in series branch road and the second fly-wheel diode, the sun level of the first described fly-wheel diode is connected with the first end of the first clamping capacitance, the negative electrode of the first described fly-wheel diode is connected with the first end of multiplication of voltage series arm, the sun level of the second described fly-wheel diode is connected with the first end of the second clamping capacitance, and the negative electrode of the second described fly-wheel diode is connected with the second end of multiplication of voltage series arm;
In the output circuit unit of converter, the anode of the first output diode is connected with the negative electrode of the first fly-wheel diode, the anode of the second output diode is connected with the negative electrode of the second fly-wheel diode, the negative electrode of the first output diode is connected with the negative electrode of the second output diode and the first end of output capacitance, and the second end of output capacitance is connected with the negative pole of input power.
Described converter, the one or more synchronous rectifiers that make in its first fly-wheel diode, the second fly-wheel diode, the first output diode and the second output diode, all can normally work.
When the work of the utility model converter, utilize the transformer action of coupling inductance to expand converter voltage gain, reduced the voltage stress of power switch pipe and diode, reduced the conduction loss of power device.The introducing of voltage-multiplying circuit unit has further improved the voltage gain of circuit and has reduced the voltage stress of device; Utilize the leakage inductance of coupling inductance to realize the no-voltage of power switch pipe open-minded; Utilize the leakage inductance of coupling inductance also to realize the soft shutoff of fly-wheel diode and output diode simultaneously; Utilize clamp switch pipe and clamping capacitance to absorb the energy of leakage inductance, no-voltage spike when main switch is turn-offed, and the leakage inductance energy absorbing is finally delivered to load, realizes Lossless Snubber; Its circuit structure is simple, and it is convenient to control, and is applicable to small-power, high-gain and the high efficiency distributed photovoltaic occasion of generating electricity by way of merging two or more grid systems.
In the utility model without extra inductance element, naturally sharing current, it is convenient to control, noenergy losser in circuit can improve the efficiency of circuit, and in commutation course, no-voltage overshoot when power switch pipe turn-offs, no current overshoot when fly-wheel diode is opened.Coupling inductance transferring energy all in the time that corresponding switching tube turns on and off, has improved the utilance of coupling inductance, has reduced the volume of coupling inductance.
Brief description of the drawings
Fig. 1 is the circuit diagram of the high step-up ratio converter of a kind of DC Module based on coupling inductance of the utility model;
Embodiment
Referring to Fig. 1, high step-up ratio converter for a kind of DC Module based on coupling inductance of the present utility model, comprises Boost booster circuit unit, afterflow booster circuit unit and output circuit unit.
In the Boost booster circuit unit of converter, the first end of the first winding L 1 is connected with the first end of the second winding L 2 and the positive pole of power supply Vin, the second end of the first winding L 1 is connected with the drain electrode of the first switching tube S1, the second end of the second winding L 2 is connected with the drain electrode of second switch pipe S2, the source electrode of the first switching tube S1 is connected with the source electrode of second switch pipe S2 and the negative pole of power supply Vin, the source electrode of the first clamp switch pipe Sc1 is connected with the drain electrode of the first switching tube S1, the drain electrode of the first clamp switch pipe Sc1 is connected with the first end of the first clamping capacitance Cc1, the source electrode of the second clamp switch pipe Sc2 is connected with the drain electrode of second switch pipe S2, the drain electrode of the second clamp switch pipe Sc2 is connected with the first end of the second clamping capacitance Cc2, the second end of the first clamping capacitance Cc1 is connected with the second end of the second clamping capacitance Cc2 and the negative pole of power supply Vin,
The afterflow booster circuit unit of converter comprises,
A) windings in series branch road, in series by tertiary winding L3 and the 4th winding L 4, wherein the first winding L 1 and tertiary winding L3 are all two windings in a coupling inductance, the second winding L 2 and the 4th winding L 4 are all two windings in another coupling inductance, hold as reference taking the first end of the first winding L 1 and the first end of the second winding L 2, tertiary winding L3 is connected with Same Name of Ends or different name end with reference to end in the 4th winding L 4;
B) the first sustained diode r1 being connected with windings in series branch road and the second sustained diode r2, the sun level of the first described sustained diode r1 is connected with the first end of the first clamping capacitance Cc1, the negative electrode of the first described sustained diode r1 is connected with the first end of multiplication of voltage series arm, the sun level of the second described sustained diode r2 is connected with the first end of the second clamping capacitance Cc2, and the negative electrode of the second described sustained diode r2 is connected with the second end of multiplication of voltage series arm;
In the output circuit unit of converter, the anode of the first output diode Do1 is connected with the negative electrode of the first sustained diode r1, the anode of the second output diode Do2 is connected with the negative electrode of the second sustained diode r2, the negative electrode of the first output diode Do1 is connected with the negative electrode of the second output diode Do2 and the first end of output capacitance Co, and the second end of output capacitance Co is connected with the negative pole of input power Vin.
The DC Module of coupling inductance has four kinds of courses of work in a switch periods with high step-up ratio converter, the first switching tube S1 turn-offs the change of current between the first clamp switch pipe Sc1 conducting, the first clamp switch pipe Sc1 turn-offs the change of current between the first switching tube S1 conducting, second switch pipe S2 turn-offs the change of current between the second clamp switch pipe Sc2 conducting, and the second clamp switch pipe Sc2 turn-offs the change of current between second switch pipe S2 conducting.
The first switching tube S1 turn-offs the change of current between the first clamp switch pipe Sc1 conducting:
Before the change of current, circuit is in the first switching tube S1 and second switch pipe S2 conducting, the steady-working state that the first clamp switch pipe Sc1, the second clamp switch pipe Sc2, the first sustained diode r1, the second sustained diode r2, the first output diode Do1 and the second output diode Do2 turn-off.In the time that the first switching tube S1 turn-offs, the first clamp switch pipe Sc1 is open-minded, due to the effect of the first clamping capacitance Cc1, the first switching tube S1 both end voltage is certain voltage value by clamp, and the first output diode Do1 and the second sustained diode r2 are open-minded simultaneously, to output capacitance Co transferring energy, in this process due to the existence of switching tube parasitic capacitance, the rising of starting from scratch of the voltage at the first switching tube S1 two ends, realizes no-voltage open-minded, afterwards the first clamping capacitance Cc1 and leakage inductance resonance.
The first clamp switch pipe Sc1 turn-offs the change of current between the first switching tube S1 conducting:
The first clamp switch pipe Sc1 turn-offs, due to the existence of switching tube parasitic capacitance, the first clamp switch pipe Sc1 realizes no-voltage and turn-offs, the first switching tube S1 voltage drops to zero because leakage inductance exists afterwards, its body diode conducting, now add the signal of opening of the first switching tube S1, realize no-voltage open-minded, the winding branch current of connecting afterwards drops to zero, the first output diode Do1 and the second sustained diode r2 turn-off, circuit is got back to initial steady-working state, to the magnetizing inductance charging of two coupling inductances.
Second switch pipe S2 turn-offs the change of current between the second clamp switch pipe Sc2 conducting:
In the time that second switch pipe S2 turn-offs, the second clamp switch pipe Sc2 is open-minded, due to the effect of the second clamping capacitance Cc2, second switch pipe S2 both end voltage is certain voltage value by clamp, and the second output diode Do2 and the first sustained diode r1 are open-minded simultaneously, to output capacitance Co transferring energy, in this process due to the existence of switching tube parasitic capacitance, the rising of starting from scratch of the voltage at second switch pipe S2 two ends, realizes no-voltage open-minded, afterwards the second clamping capacitance Cc2 and leakage inductance resonance.
The second clamp switch pipe Sc2 turn-offs the change of current between second switch pipe S2 conducting:
The second clamp switch pipe Sc2 turn-offs, due to the existence of switching tube parasitic capacitance, the second clamp switch pipe Sc2 realizes no-voltage and turn-offs, second switch pipe S2 voltage drops to zero because leakage inductance exists afterwards, its body diode conducting, now add the signal of opening of second switch pipe S2, realize no-voltage open-minded, the winding branch current of connecting afterwards drops to zero, the second output diode Do2 and the first sustained diode r1 turn-off, circuit is got back to initial steady-working state, to the magnetizing inductance charging of two coupling inductances.
Claims (2)
1. a high step-up ratio converter for the DC Module based on coupling inductance, comprise Boost booster circuit unit, afterflow booster circuit unit and output circuit unit, it is characterized in that: in described Boost booster circuit unit, the first end of the first winding L 1 is connected with the first end of the second winding L 2 and the positive pole of power supply Vin, the second end of the first winding L 1 is connected with the drain electrode of the first switching tube S1, the second end of the second winding L 2 is connected with the drain electrode of second switch pipe S2, the source electrode of the first switching tube S1 is connected with the source electrode of second switch pipe S2 and the negative pole of power supply Vin, the source electrode of the first clamp switch pipe Sc1 is connected with the drain electrode of the first switching tube S1, the drain electrode of the first clamp switch pipe Sc1 is connected with the first end of the first clamping capacitance Cc1, the source electrode of the second clamp switch pipe Sc2 is connected with the drain electrode of second switch pipe S2, the drain electrode of the second clamp switch pipe Sc2 is connected with the first end of the second clamping capacitance Cc2, the second end of the first clamping capacitance Cc1 is connected with the second end of the second clamping capacitance Cc2 and the negative pole of power supply Vin,
Described afterflow booster circuit unit comprises,
A) windings in series branch road, in series by tertiary winding L3 and the 4th winding L 4, wherein the first winding L 1 and tertiary winding L3 are all two windings in a coupling inductance, the second winding L 2 and the 4th winding L 4 are all two windings in another coupling inductance, hold as reference taking the first end of the first winding L 1 and the first end of the second winding L 2, tertiary winding L3 is connected with Same Name of Ends or different name end with reference to end in the 4th winding L 4;
B) the first sustained diode r1 being connected with windings in series branch road and the second sustained diode r2, the sun level of the first described sustained diode r1 is connected with the first end of the first clamping capacitance Cc1, the negative electrode of the first described sustained diode r1 is connected with the first end of multiplication of voltage series arm, the sun level of the second described sustained diode r2 is connected with the first end of the second clamping capacitance Cc2, and the negative electrode of the second described sustained diode r2 is connected with the second end of multiplication of voltage series arm;
In described output circuit unit, the anode of the first output diode Do1 is connected with the negative electrode of the first sustained diode r1, the anode of the second output diode Do2 is connected with the negative electrode of the second sustained diode r2, the negative electrode of the first output diode Do1 is connected with the negative electrode of the second output diode Do2 and the first end of output capacitance Co, and the second end of output capacitance Co is connected with the negative pole of input power Vin.
2. high step-up ratio converter for a kind of DC Module based on coupling inductance as claimed in claim 1, it is characterized in that, one or more synchronous rectifiers that make in the first sustained diode r1, the second sustained diode r2, the first output diode Do1 and the second output diode Do2, all can normally work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320889155.6U CN203775030U (en) | 2013-12-30 | 2013-12-30 | DC-module-used high-voltage-boost-ratio converter based on coupling inductors |
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| CN201320889155.6U CN203775030U (en) | 2013-12-30 | 2013-12-30 | DC-module-used high-voltage-boost-ratio converter based on coupling inductors |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746556A (en) * | 2013-12-30 | 2014-04-23 | 杭州科为达电气有限公司 | High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors |
| CN104218798A (en) * | 2014-09-18 | 2014-12-17 | 天津大学 | High voltage gain bidirectional DC-DC (direct current-direct current) converter based on switching capacitors and coupling inductors |
| CN106787860A (en) * | 2016-12-30 | 2017-05-31 | 杭州禾迈电力电子技术有限公司 | A kind of single-stage isolated type Three-phase PFC |
-
2013
- 2013-12-30 CN CN201320889155.6U patent/CN203775030U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746556A (en) * | 2013-12-30 | 2014-04-23 | 杭州科为达电气有限公司 | High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors |
| CN104218798A (en) * | 2014-09-18 | 2014-12-17 | 天津大学 | High voltage gain bidirectional DC-DC (direct current-direct current) converter based on switching capacitors and coupling inductors |
| CN106787860A (en) * | 2016-12-30 | 2017-05-31 | 杭州禾迈电力电子技术有限公司 | A kind of single-stage isolated type Three-phase PFC |
| CN106787860B (en) * | 2016-12-30 | 2023-06-16 | 杭州禾迈电力电子股份有限公司 | Single-stage isolated three-phase PFC converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310005 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Hemai Power Electronics Co.,Ltd. Address before: 310005 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Hemai Power Electronics Co.,Ltd. Address after: 310005 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Hemai Power Electronics Co.,Ltd. Address before: 310005 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: HOYMILES CONVERTER TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
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| CX01 | Expiry of patent term |