CN103051180A - Voltage-multiplying unit-containing passive lossless clamping high-gain converter - Google Patents
Voltage-multiplying unit-containing passive lossless clamping high-gain converter Download PDFInfo
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- CN103051180A CN103051180A CN2012105767538A CN201210576753A CN103051180A CN 103051180 A CN103051180 A CN 103051180A CN 2012105767538 A CN2012105767538 A CN 2012105767538A CN 201210576753 A CN201210576753 A CN 201210576753A CN 103051180 A CN103051180 A CN 103051180A
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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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- 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
A voltage-multiplying unit-containing passive lossless clamping high-gain converter comprises a power switch tube, two freewheel diodes, an output diode, a clamping capacitor, a voltage-multiplying capacitor, an output capacitor and a coupling inductance with two windings. The coupling inductance is utilized to expand the voltage gain of the converter and reduce the voltage stresses of the power switch tube and the diodes, the leakage inductance of the coupling inductance is used to realize the zero current turning-on of the power switch tube and restrain the reverse recovery currents of the diodes, a clamping circuit which is formed by the output diode and the clamping capacitor effectively absorbs voltage spikes when the power switch tube is turned off and realizes energy lossless transfer, and the voltage-multiplying capacitor is used to further improve the converter gain and further reduce the voltage stresses of the power switch tube and the diodes. The converter is simple in circuit structure, convenient to control and suitable for small power high-gain efficient grid-connected photovoltaic power generation occasions.
Description
Technical field
The present invention relates to a kind of DC-to-DC converter and application, is the passive and nondestructive clamping high-gain converter that contains voltage doubling unit specifically.
Background technology
In solar power system, because the output voltage of monolithic solar cell is lower, and the required voltage of inversion grid connection generating is higher, therefore needs the one-level DC-to-DC converter low voltage and direct current to be converted to the high-voltage direct-current electricity that is fit to be incorporated into the power networks.In the distributed solar energy electricity generating plan, the power capacity of monolithic solar cell is less, but having relatively high expectations to efficient.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 single-phase single-tube booster type (Boost) DC-DC converter only has duty ratio to determine that voltage gain is limited, is difficult to satisfy 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 the hard switching state, and switching loss is larger.In order to realize the soft switch motion of Boost converter, in recent years, some have in succession been 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 to adopt the scheme of 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 the coupling inductance complex structure, is unfavorable for industrial processes, is difficult to guarantee the consistency of circuit.
Summary of the invention
The voltage gain that the present invention will overcome conventional single-phase single-tube DC-DC converter is not high, conduction loss and the large shortcoming of switch power consumption, provide a kind of simple in structure, control the passive and nondestructive clamping high-gain converter that contains voltage doubling unit of convenient and noenergy loss.
The passive and nondestructive clamping high-gain converter that contains voltage doubling unit of the present invention, the first end of coupling inductance the first winding links to each other with the positive pole of power supply, the second end of the first winding and the drain electrode of power switch pipe, the anode of fly-wheel diode 1 and the first end of clamping capacitance link to each other, the second end of clamping capacitance links to each other with the negative electrode of fly-wheel diode 2 and the anode of output diode, the negative electrode of output diode links to each other with the first end of output capacitance, and the negative pole of power supply links to each other with the second end of the source electrode of power switch pipe and output capacitance;
The first end of coupling inductance the second winding links to each other with the anode of the negative electrode of fly-wheel diode 1 and fly-wheel diode 2, coupling inductance the second winding the second end links to each other with the first end of multiplication of voltage electric capacity, the second end of multiplication of voltage electric capacity links to each other with the negative pole of power supply, coupling inductance the second winding and coupling inductance the first winding are all two windings in the coupling inductance, the Same Name of Ends take the first end of the first end of the first winding and the second winding as coupling inductance;
Described converter, the one or more synchronous rectifiers that make in two fly-wheel diode and the output diode all can work.
During converter work of the present invention, utilize the transformer action of coupling inductance to expand the converter voltage gain, reduced the voltage stress of power switch pipe, 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 zero current turning-on of power switch pipe; Utilize simultaneously the leakage inductance of coupling inductance also to realize the soft shutoff of fly-wheel diode and output diode; Utilize the energy of output diode and clamping capacitance absorption leakage inductance, no-voltage spike when power switch pipe is turn-offed, and the leakage inductance energy that absorbs finally is delivered to load, the realization Lossless Snubber; Its circuit structure is simple, and control is convenient, 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.
Advantage of the present invention is: need not extra power switch and inductance element, attachment element is few, simple in structure, control is convenient, noenergy losser in the circuit can improve the efficient of circuit, and in the 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 when the switching tube of correspondence turns on and off has improved the utilance of coupling inductance, has reduced the volume of coupling inductance.
Description of drawings
Fig. 1 is circuit diagram of the present invention;
Embodiment
Referring to Fig. 1, in the passive and nondestructive clamping high-gain converter that contains voltage doubling unit of the present invention, coupling inductance the first winding L
1First end link to each other the first winding L with the positive pole of power supply Vin
1The second end and the drain electrode of power switch tube S, fly-wheel diode 1Dr
1Anode and the first end of clamping capacitance Cc link to each other the second end of clamping capacitance Cc and fly-wheel diode 2Dr
2Negative electrode and the anode of output diode Do link to each other, the negative electrode of output diode Do links to each other with the first end of output capacitance Co, the negative pole of power supply Vin links to each other with the second end of the source electrode of power switch tube S and output capacitance Co;
Coupling inductance the second winding L
2First end and fly-wheel diode 1Dr
1Negative electrode and fly-wheel diode 2Dr
2Anode link to each other coupling inductance the second winding L
2The second end links to each other with the first end of multiplication of voltage capacitor C m, and the second end of multiplication of voltage capacitor C m links to each other with the negative pole of power supply Vin, coupling inductance the second winding L
2With coupling inductance the first winding L
1Be all two windings in the coupling inductance, among the figure by " * " mark the first winding L
1With the second winding L
2Same Name of Ends;
The voltage of output capacitance Co is Vout, and energy finally passes to load Ro.
The passive and nondestructive clamping high-gain converter that contains voltage doubling unit has five kinds of courses of work in a switch periods, i.e. the change of current between power switch tube S shutoff and output diode Do open; Fly-wheel diode 2Dr
2Turn-off and fly-wheel diode 1Dr
1The change of current between the conducting; Output diode Do turn off process; Fly-wheel diode 1Dr
1Commutation course between shutoff and power switch tube S are opened, fly-wheel diode 2Dr
2Turn on process.
The change of current between power switch tube S shutoff and output diode Do open:
Before the change of current, circuit is in power switch tube S and fly-wheel diode 2Dr
2Conducting, fly-wheel diode 1Dr
1Steady-working state with output diode Do shutoff.When power switch tube S is turn-offed, voltage rises rapidly on the power switch tube S, the voltage at output diode Do two ends is dropped rapidly to zero, output diode Do is open-minded, because the effect of clamping capacitance Cc, the voltage at power switch tube S two ends is certain voltage value by clamp, has realized that the soft clamping of power switch tube S turn-offs.
Fly-wheel diode 2Dr
2Turn-off and fly-wheel diode 1Dr
1The change of current between the conducting:
After output diode Do opened, the voltage on the clamping capacitance Cc descended so that certain slope is linear from certain value, and the energy of the leakage inductance energy of coupling inductance and clamping capacitance Cc is transferred to output, fly-wheel diode 2Dr
2Electric current drop to zero with certain slope linearity, fly-wheel diode 2Dr
2Turn-off.And fly-wheel diode 1Dr
1The voltage linear at two ends drops to zero, fly-wheel diode 1Dr
1Open-minded, energy begins to shift to multiplication of voltage capacitor C m.Circuit enters into power switch tube S and fly-wheel diode 2Dr
2Turn-off fly-wheel diode 1Dr
1Steady-working state with output diode Do conducting.
Output diode Do turn off process:
After the output diode Do conducting, the electric current on the output diode Do descends so that certain slope is linear, and when the electric current on the output diode Do dropped to zero, output diode Do turn-offed naturally, and energy is transferred among the multiplication of voltage capacitor C m by coupling inductance the second winding.Circuit ingoing power switching tube S, output diode Do and fly-wheel diode 2Dr
2Turn-off fly-wheel diode 1Dr
1The steady-working state of conducting.
Fly-wheel diode 1Dr
1Commutation course between shutoff and power switch tube S are opened:
The gate signal of power switch tube S provides, and the electric current of power switch tube S rises from zero so that certain slope is linear, has realized the zero current turning-on of power switch tube S, fly-wheel diode 1Dr
1Electric current descend so that certain slope is linear, as fly-wheel diode 1Dr
1Electric current when dropping to zero, fly-wheel diode 1Dr
1Turn-off, realized fly-wheel diode 1Dr
1The change of current between shutoff and power switch tube S are opened has reduced fly-wheel diode 1Dr
1Reverse recovery loss.
Fly-wheel diode 2Dr
2Turn on process:
Power switch tube S is opened and fly-wheel diode 1Dr
1Have no progeny in the pass, coupling inductance is operated in the normal shock transformer state, fly-wheel diode 2Dr
2The voltage linear at two ends drops to zero, fly-wheel diode 2Dr
2Open-minded, energy begins to transfer to clamping capacitance Cc.Circuit ingoing power switching tube S and fly-wheel diode 2Dr
2Conducting, fly-wheel diode 1Dr
1Steady-working state with output diode Do shutoff.
Claims (2)
1. passive and nondestructive clamping high-gain converter that contains voltage doubling unit is characterized in that:
Coupling inductance the first winding (L
1) first end link to each other the first winding (L with the positive pole of power supply (Vin)
1) the second end and the drain electrode of power switch pipe (S), fly-wheel diode 1(Dr
1) anode and the first end of clamping capacitance (Cc) link to each other the second end of clamping capacitance (Cc) and fly-wheel diode 2(Dr
2) negative electrode and the anode of output diode (Do) link to each other, the negative electrode of output diode (Do) links to each other with the first end of output capacitance (Co), the negative pole of power supply (Vin) links to each other with the source electrode of power switch pipe (S) and the second end of output capacitance (Co);
Coupling inductance the second winding (L
2) first end and fly-wheel diode 1(Dr
1) negative electrode and fly-wheel diode 2(Dr
2) anode link to each other coupling inductance the second winding (L
2) the second end links to each other with the first end of multiplication of voltage electric capacity (Cm), the second end of multiplication of voltage electric capacity (Cm) links to each other with the negative pole of power supply (Vin), coupling inductance the second winding (L
2) and coupling inductance the first winding (L
1) be all two windings in the coupling inductance, with the first winding (L
1) first end and the second winding (L
2) first end be the Same Name of Ends of coupling inductance.
2. the passive and nondestructive clamping high-gain converter that contains voltage doubling unit as claimed in claim 1 is characterized in that fly-wheel diode 1(Dr
1), fly-wheel diode 2(Dr
2) and output diode (Do) in one or more synchronous rectifiers that make into, all can work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105767538A CN103051180A (en) | 2012-12-26 | 2012-12-26 | Voltage-multiplying unit-containing passive lossless clamping high-gain converter |
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| CN2012105767538A CN103051180A (en) | 2012-12-26 | 2012-12-26 | Voltage-multiplying unit-containing passive lossless clamping high-gain converter |
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| CN103051180A true CN103051180A (en) | 2013-04-17 |
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Cited By (2)
| 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 |
| CN108696168A (en) * | 2018-06-22 | 2018-10-23 | 燕山大学 | High-gain single-phase single-grade Transformer-free photovoltaic DC-to-AC converter and its control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201608539U (en) * | 2009-12-31 | 2010-10-13 | 杭州浙大太阳电气有限公司 | Passive lossless clamping one-phase high-gain convertor |
| CN101867297A (en) * | 2010-07-02 | 2010-10-20 | 杭州浙大太阳电气有限公司 | Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation |
| CN201789421U (en) * | 2010-07-02 | 2011-04-06 | 杭州浙大太阳电气有限公司 | Single-phase soft switching high-gain boost converter for distributed photovoltaic power generation |
| CN102364852A (en) * | 2011-10-24 | 2012-02-29 | 杭州浙阳电气有限公司 | Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit |
| CN202353467U (en) * | 2011-10-24 | 2012-07-25 | 杭州浙阳电气有限公司 | High-gain converter with single switch tube based on coupling inductance voltage-multiplying unit |
| CN203039580U (en) * | 2012-12-26 | 2013-07-03 | 杭州科为达电气有限公司 | passive Passive lossless clamp high gain converter with voltage-multiplying unit |
-
2012
- 2012-12-26 CN CN2012105767538A patent/CN103051180A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201608539U (en) * | 2009-12-31 | 2010-10-13 | 杭州浙大太阳电气有限公司 | Passive lossless clamping one-phase high-gain convertor |
| CN101867297A (en) * | 2010-07-02 | 2010-10-20 | 杭州浙大太阳电气有限公司 | Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation |
| CN201789421U (en) * | 2010-07-02 | 2011-04-06 | 杭州浙大太阳电气有限公司 | Single-phase soft switching high-gain boost converter for distributed photovoltaic power generation |
| CN102364852A (en) * | 2011-10-24 | 2012-02-29 | 杭州浙阳电气有限公司 | Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit |
| CN202353467U (en) * | 2011-10-24 | 2012-07-25 | 杭州浙阳电气有限公司 | High-gain converter with single switch tube based on coupling inductance voltage-multiplying unit |
| CN203039580U (en) * | 2012-12-26 | 2013-07-03 | 杭州科为达电气有限公司 | passive Passive lossless clamp high gain converter with voltage-multiplying unit |
Cited By (2)
| 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 |
| CN108696168A (en) * | 2018-06-22 | 2018-10-23 | 燕山大学 | High-gain single-phase single-grade Transformer-free photovoltaic DC-to-AC converter and its control method |
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Address after: Hangzhou City, Zhejiang province 310005 Gongshu District Kang Road No. 18 building 11 floor Applicant after: HANGZHOU HEMAI POWER ELECTRONIC TECHNOLOGY CO., LTD. Address before: Hangzhou City, Zhejiang province 310015 Gongshu District Kang Jing Lu No. 18 11 crashed on the third floor Applicant before: Hangzhou Keweida Electric Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: HANGZHOU CONVERTER ELECTRICAL CO., LTD. TO: HANGZHOU HEMAI POWER ELECTRONIC TECHNOLOGY CO., LTD. |
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Application publication date: 20130417 |