CN103066837A - High gain voltage-multiplying structure active lossless clamping converter - Google Patents
High gain voltage-multiplying structure active lossless clamping converter Download PDFInfo
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- CN103066837A CN103066837A CN201210576622XA CN201210576622A CN103066837A CN 103066837 A CN103066837 A CN 103066837A CN 201210576622X A CN201210576622X A CN 201210576622XA CN 201210576622 A CN201210576622 A CN 201210576622A CN 103066837 A CN103066837 A CN 103066837A
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Abstract
A high gain voltage-multiplying structure active lossless clamping converter comprises a main switch tube, a clamping switch tube, a follow current diode, an output diode, a clamping capacitor, a voltage-multiplying capacitor, an output capacitor and a coupling inductor provided with two windings. According to the high gain voltage-multiplying structure active lossless clamping converter, voltage gain of the converter is expanded and voltage stress reduction of a power switch tube and the diodes are achieved by means of the coupling inductor, by means of leakage inductance of the coupling inductor, no-voltage opening of the switch tubes and reverse recovery currents of the diodes are achieved, a clamping circuit formed by the clamping switch tube and the clamping capacitor effectively absorbs the voltage spike when the main switch tube is cut off and achieves lossless transfer of energy, grain of the converter is further improved by means of a voltage-multiplying circuit, voltage stress of the power switch tube and the output diode is further reduced, and the circuit is simple in structure, convenient to control, and suitable for grid-connected photovoltaic power generation conversion occasions with low power, high grain and high efficiency.
Description
Technical field
The present invention relates to a kind of DC-to-DC converter and application, is high-gain times laminated structure active lossless clamp converter 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.
Only by the duty ratio decision, voltage gain is limited, is difficult to satisfy the conversion requirement of high-gain for the voltage gain of conventional single-phase single-tube booster type (Boost) DC-DC converter.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, provides a kind of simple in structure, the high-gain times laminated structure active lossless clamp converter of the convenient and noenergy loss of control.
High-gain of the present invention times laminated structure active lossless clamp converter, 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 links to each other with the source electrode of the drain electrode of main switch and clamp switch pipe, the drain electrode of clamp switch pipe links to each other with the anode of the first end of clamping capacitance and fly-wheel diode, and the second end of the source electrode of main switch and the negative pole of power supply and clamping capacitance links to each other;
The first end of coupling inductance the second winding links to each other with the positive pole of power supply, 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 electrode of fly-wheel diode, 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;
The anode of output diode links to each other with the negative electrode of fly-wheel diode, and the negative electrode of output diode links to each other with the first end of output capacitance, and the second end of output capacitance links to each other with the first end of clamping capacitance.
Described converter, the one or more synchronous rectifiers that make in its 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 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 that the no-voltage of power switch pipe is open-minded; 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 clamp switch pipe and clamping capacitance absorption leakage inductance, no-voltage spike when main switch 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 high-gain of the present invention times laminated structure active lossless clamp converter, 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 link to each other with the drain electrode of main switch S and the source electrode of clamp switch pipe Sc, the drain electrode of clamp switch pipe Sc links to each other with the anode of the first end of clamping capacitance Cc and sustained diode r, and the negative pole of the source electrode of main switch S and power supply Vin and the second end of clamping capacitance Cc link to each other;
Coupling inductance the second winding L
2First end link to each other coupling inductance the second winding L with the positive pole of power supply Vin
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 electrode of sustained diode r, 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 anode of output diode Do links to each other with the negative electrode of sustained diode r, and the negative electrode of output diode Do links to each other with the first end of output capacitance Co, and the second end of output capacitance Co links to each other with the first end of clamping capacitance Cc.
The voltage of output capacitance Co is Vout, and energy finally passes to load Ro.
A high-gain times laminated structure active lossless clamp converter has six kinds of courses of work in a switch periods, i.e. the change of current between the body diode of main switch S shutoff and clamp switch pipe Sc is opened; The change of current between sustained diode r shutoff and the output diode Do conducting; Clamp switch pipe Sc turn on process; The change of current between the body diode of clamp switch pipe Sc shutoff and main switch S is opened; Commutation course between output diode Do shutoff and main switch S open; Sustained diode r turn on process.
The change of current between the body diode of main switch S shutoff and clamp switch pipe Sc is opened:
Before the change of current, circuit is in main switch S and sustained diode r conducting, the steady-working state that clamp switch pipe Sc and output diode Do turn-off.When main switch S turn-offs, owing to having electric capacity between main switch S drain electrode and the source electrode, therefore main switch S realizes the no-voltage shutoff, the upper voltage of main switch S rises rapidly subsequently, the voltage at clamp switch pipe Sc two ends is dropped rapidly to zero, and the body diode of clamp switch pipe Sc is open-minded, because the effect of clamping capacitance Cc, the voltage at main switch S two ends is certain voltage value by clamp, has realized that the clamp of main switch S turn-offs.
The change of current between sustained diode r shutoff and the output diode Do conducting:
After the body diode of clamp switch pipe Sc is opened, voltage on the clamping capacitance Cc begins to rise from certain value, the leakage inductance energy of coupling inductance is transferred on the clamping capacitance Cc, and the electric current of sustained diode r drops to zero with certain slope linearity, and sustained diode r turn-offs.And the voltage linear at output diode Do two ends drops to zero, and output diode Do is open-minded, and energy begins to transfer to output.Circuit enters into main switch S and sustained diode r turn-offs, the steady-working state of the body diode of clamp switch pipe Sc and output diode Do conducting.
Clamp switch pipe Sc opening process:
After the output diode Do conducting, the also conducting of the body diode of clamp switch pipe Sc, the voltage drop at clamp switch pipe Sc two ends is to zero, and this moment, the gate signal of clamp switch pipe Sc provided, and clamp switch pipe Sc has realized that no-voltage is open-minded.The leakage inductance of coupling inductance and clamping capacitance Cc resonance, the energy between transmits alternately.Energy is transferred to load Ro by coupling inductance the second winding from multiplication of voltage capacitor C m.Circuit enters main switch S and sustained diode r turn-offs, the steady-working state of clamp switch pipe Sc and output diode Do conducting.
Commutation course between the body diode of clamp switch pipe Sc shutoff and main switch S is opened:
Clamp switch pipe Sc turn-offs, owing to having parasitic capacitance between clamp switch pipe Sc drain electrode and the source electrode, clamp switch pipe Sc realizes the no-voltage shutoff.Clamp switch pipe Sc closes and has no progeny, and the leakage inductance of coupling inductance begins to extract the energy on the electric capacity between main switch S drain electrode and the source electrode.Energy on electric capacity is taken out to the greatest extent, the body diode conducting of main switch S.
Main switch S opens and the commutation course of output diode Do between turn-offing:
The gate signal of main switch S provides, because the conducting of body diode of main switch S, therefore main switch S has realized that no-voltage is open-minded, the electric current of main switch S rises so that certain slope is linear, the electric current of output diode Do descends so that certain slope is linear, and when the electric current of output diode Do dropped to zero, output diode Do turn-offed, realized that output diode Do turn-offs and the change of current of main switch S between opening, reduced the reverse recovery loss of output diode Do.
Sustained diode r turn on process:
Main switch S opens with output diode Do pass and has no progeny, and coupling inductance is operated in the normal shock transformer state, and the voltage linear at sustained diode r two ends drops to zero, and sustained diode r is open-minded, and energy begins to transfer to multiplication of voltage capacitor C m.Circuit enters main switch S and sustained diode r conducting, the steady-working state that clamp switch pipe Sc and output diode Do turn-off.
Claims (2)
1. high-gain times laminated structure active lossless clamp converter 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 link to each other with the drain electrode of main switch (S) and the source electrode of clamp switch pipe (Sc), the drain electrode of clamp switch pipe (Sc) links to each other with the first end of clamping capacitance (Cc) and the anode of fly-wheel diode (Dr), and the negative pole of the source electrode of main switch (S) and power supply (Vin) and the second end of clamping capacitance (Cc) link to each other;
Coupling inductance the second winding (L
2) first end link to each other coupling inductance the second winding (L with the positive pole of power supply (Vin)
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 electrode of fly-wheel diode (Dr), 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;
The anode of output diode (Do) links to each other with the negative electrode of fly-wheel diode (Dr), and the negative electrode of output diode (Do) links to each other with the first end of output capacitance (Co), and the second end of output capacitance (Co) links to each other with the first end of clamping capacitance (Cc).
2. high-gain as claimed in claim 1 times laminated structure active lossless clamp converter is characterized in that, the one or more synchronous rectifiers that make in fly-wheel diode (Dr) and the output diode (Do) all can work.
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| CN201210576622XA CN103066837A (en) | 2012-12-26 | 2012-12-26 | High gain voltage-multiplying structure active lossless clamping converter |
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| CN201210576622XA CN103066837A (en) | 2012-12-26 | 2012-12-26 | High gain voltage-multiplying structure active lossless clamping converter |
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Cited By (5)
| 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 |
| CN104811039A (en) * | 2015-05-07 | 2015-07-29 | 盐城工学院 | Switch power source converter |
| US9774270B2 (en) | 2015-06-15 | 2017-09-26 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| CN110707938A (en) * | 2019-10-18 | 2020-01-17 | 徐州上若科技有限公司 | High-transformation-ratio bidirectional DC/DC converter based on coupling inductor |
| US10770965B2 (en) | 2015-06-15 | 2020-09-08 | Apple Inc. | Control of series-parallel mode (SPM) clamped flyback converter |
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| US20060226816A1 (en) * | 2005-04-11 | 2006-10-12 | Yuan Ze University | Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor |
| CN101022244A (en) * | 2007-03-05 | 2007-08-22 | 浙江大学 | Active clamp zero voltage soft switch high gain booster staggered parallel converter |
| 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 |
| 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 |
| CN203039579U (en) * | 2012-12-26 | 2013-07-03 | 杭州科为达电气有限公司 | High gain voltage-multiplying structure active lossless clamp converter |
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2012
- 2012-12-26 CN CN201210576622XA patent/CN103066837A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060226816A1 (en) * | 2005-04-11 | 2006-10-12 | Yuan Ze University | Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor |
| CN101022244A (en) * | 2007-03-05 | 2007-08-22 | 浙江大学 | Active clamp zero voltage soft switch high gain booster staggered parallel converter |
| 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 |
| 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 |
| CN203039579U (en) * | 2012-12-26 | 2013-07-03 | 杭州科为达电气有限公司 | High gain voltage-multiplying structure active lossless clamp converter |
Cited By (9)
| 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 |
| CN104811039A (en) * | 2015-05-07 | 2015-07-29 | 盐城工学院 | Switch power source converter |
| US9774270B2 (en) | 2015-06-15 | 2017-09-26 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| US9893636B2 (en) | 2015-06-15 | 2018-02-13 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| US10250149B2 (en) | 2015-06-15 | 2019-04-02 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| US10770977B2 (en) | 2015-06-15 | 2020-09-08 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| US10770965B2 (en) | 2015-06-15 | 2020-09-08 | Apple Inc. | Control of series-parallel mode (SPM) clamped flyback converter |
| US10848069B2 (en) | 2015-06-15 | 2020-11-24 | Apple Inc. | Systems and methods of operation for power converters having series-parallel mode active clamps |
| CN110707938A (en) * | 2019-10-18 | 2020-01-17 | 徐州上若科技有限公司 | High-transformation-ratio bidirectional DC/DC converter based on coupling inductor |
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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 Road No. 18 building 11 floor Applicant before: Hangzhou Keweida Electric Co., Ltd. |
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Application publication date: 20130424 |