CN203039579U - High gain voltage-multiplying structure active lossless clamp converter - Google Patents
High gain voltage-multiplying structure active lossless clamp converter Download PDFInfo
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- CN203039579U CN203039579U CN 201220730769 CN201220730769U CN203039579U CN 203039579 U CN203039579 U CN 203039579U CN 201220730769 CN201220730769 CN 201220730769 CN 201220730769 U CN201220730769 U CN 201220730769U CN 203039579 U CN203039579 U CN 203039579U
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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 provides a high gain voltage-multiplying structure active lossless clamp converter which comprises a main switch tube, a clamp switch tube, a freewheeling diode, an output diode, a clamp capacitor, a voltage-multiplying capacitor, an output capacitor and a coupling inductor with two windings. According to the utility model, the coupling inductor is used to expand the voltage gain of the converter and reduce the voltage stress of a power switch tube and the diodes; the leakage inductance of the coupling inductor is used to realize zero voltage switching of the switch tubes and suppress reverse recovery current of the diodes; a clamp circuit which is composed of the clamp switch tube and the clamp capacitor effectively absorbs voltage spikes when the main switch tube is switched off and realizes lossless energy transfer; a voltage-multiplying circuit is used to further improve the gain of the converter and further reduce the voltage stress of the power switch tube and the output diode; and the high gain voltage-multiplying structure active lossless clamp converter has the advantages of simple circuit structure and convenient control, and is suitable for a grid-connected photovoltaic power generation occasion with small power, high gain and high efficiency.
Description
Technical field
The utility model relates to a kind of DC-to-DC converter and application, is the active nondestructive clamping converter of high-gain times laminated structure 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 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 determines that by duty ratio voltage gain is limited, is difficult to satisfy the conversion requirement of high-gain.The voltage stress of power switch pipe is bigger, 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 bigger.In order to realize the soft switch motion of Boost converter, in recent years, some soft switch solution by additional active power switch or passive device have been studied in succession, though 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.In order to promote the voltage gain of converter, 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 utility model will overcome conventional single-phase single tube DC-DC converter is not high, conduction loss and the big shortcoming of switch power consumption, provide a kind of simple in structure, control the active nondestructive clamping converter of high-gain times laminated structure of convenient and noenergy loss.
The active nondestructive clamping converter of high-gain described in the utility model times laminated structure, first end of coupling inductance first winding links to each other with the positive pole of power supply, second end of 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 first end of clamping capacitance and the anode of fly-wheel diode, and second end of the source electrode of main switch and the negative pole of power supply and clamping capacitance links to each other;
First end of coupling inductance second winding links to each other with the positive pole of power supply, coupling inductance second winding second end links to each other with first end of multiplication of voltage electric capacity, second end of multiplication of voltage electric capacity links to each other with the negative electrode of fly-wheel diode, coupling inductance second winding and coupling inductance first winding are all two windings in the coupling inductance, are the end of the same name of coupling inductance with first end of first winding and first end of second winding;
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 first end of output capacitance, and second end of output capacitance links to each other with 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 operate as normal.
During the work of the utility model converter, 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 the leakage inductance of coupling inductance also to realize the soft shutoff of fly-wheel diode and output diode simultaneously; 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 harmless absorption of realization; 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.
The utility model has the advantages that: 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 is all transmitted energy when the switching tube of correspondence turns on and off, improved the utilance of coupling inductance, has reduced the volume of coupling inductance.
Description of drawings
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Referring to Fig. 1, in the active nondestructive clamping converter of high-gain of the present utility model times laminated structure, coupling inductance first winding L
1First end link to each other first winding L with the positive pole of power supply Vin
1Second 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 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 second end of clamping capacitance Cc link to each other;
Coupling inductance second winding L
2First end link to each other coupling inductance second winding L with the positive pole of power supply Vin
2Second end links to each other with first end of multiplication of voltage capacitor C m, and second end of multiplication of voltage capacitor C m links to each other with the negative electrode of sustained diode r, coupling inductance second winding L
2With coupling inductance first winding L
1Be all two windings in the coupling inductance, among the figure by " * " mark first winding L
1With second winding L
2End of the same name;
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 first end of output capacitance Co, and second end of output capacitance Co links to each other with first end of clamping capacitance Cc.
The voltage of output capacitance Co is Vout, and energy finally passes to load Ro.
The active nondestructive clamping converter of high-gain times laminated structure 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 have electric capacity between main switch S drain electrode and the source electrode, therefore main switch S realizes the no-voltage shutoff, the last 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 at clamp switch pipe Sc two ends drops 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 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 have 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 body diode conducting 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. active nondestructive clamping converter of high-gain times laminated structure is characterized in that:
The coupling inductance first winding (L
1) first end link to each other the first winding (L with the positive pole of power supply (Vin)
1) 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 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 second end of clamping capacitance (Cc) link to each other;
The coupling inductance second winding (L
2) first end link to each other the coupling inductance second winding (L with the positive pole of power supply (Vin)
2) second end links to each other with first end of multiplication of voltage electric capacity (Cm), second end of multiplication of voltage electric capacity (Cm) links to each other with the negative electrode of fly-wheel diode (Dr), the coupling inductance second winding (L
2) and the coupling inductance 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 end of the same name 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 first end of output capacitance (Co), and second end of output capacitance (Co) links to each other with first end of clamping capacitance (Cc).
2. the active nondestructive clamping converter of high-gain as claimed in claim 1 times laminated structure is characterized in that, the one or more synchronous rectifiers that make in fly-wheel diode (Dr) and the output diode (Do) all can operate as normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220730769 CN203039579U (en) | 2012-12-26 | 2012-12-26 | High gain voltage-multiplying structure active lossless clamp converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220730769 CN203039579U (en) | 2012-12-26 | 2012-12-26 | High gain voltage-multiplying structure active lossless clamp converter |
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| Publication Number | Publication Date |
|---|---|
| CN203039579U true CN203039579U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220730769 Expired - Lifetime CN203039579U (en) | 2012-12-26 | 2012-12-26 | High gain voltage-multiplying structure active lossless clamp converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066837A (en) * | 2012-12-26 | 2013-04-24 | 杭州科为达电气有限公司 | High gain voltage-multiplying structure active lossless clamping converter |
| CN103427660A (en) * | 2013-08-26 | 2013-12-04 | 华南理工大学 | Double-winding coupling inductance voltage-multiplying type single-switching-tube high-gain converter |
| CN103746564A (en) * | 2013-12-30 | 2014-04-23 | 杭州科为达电气有限公司 | High-gain active lossless clamping converter including built-in transformer and voltage-multiplying structure |
-
2012
- 2012-12-26 CN CN 201220730769 patent/CN203039579U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066837A (en) * | 2012-12-26 | 2013-04-24 | 杭州科为达电气有限公司 | High gain voltage-multiplying structure active lossless clamping converter |
| CN103427660A (en) * | 2013-08-26 | 2013-12-04 | 华南理工大学 | Double-winding coupling inductance voltage-multiplying type single-switching-tube high-gain converter |
| CN103746564A (en) * | 2013-12-30 | 2014-04-23 | 杭州科为达电气有限公司 | High-gain active lossless clamping converter including built-in transformer and voltage-multiplying structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU HEMAI POWER ELECTRONIC TECHNOLOGY CO., LT Free format text: FORMER NAME: HANGZHOU CONVERTER ELECTRICAL CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Hangzhou City, Zhejiang province 310005 Gongshu District Kang Road No. 18 building 11 floor Patentee after: HOYMILES CONVERTER TECHNOLOGY CO.,LTD. Address before: Hangzhou City, Zhejiang province 310015 Gongshu District Kang Jing Lu No. 18 11 crashed on the third floor Patentee before: HANGZHOU KEWEIDA ELECTRICS CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| 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: HOYMILES CONVERTER TECHNOLOGY 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: Hangzhou Hemai Power Electronics Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |