CN201699584U - High efficiency step-up converter for solar distributed power generation - Google Patents
High efficiency step-up converter for solar distributed power generation Download PDFInfo
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- CN201699584U CN201699584U CN2010202340113U CN201020234011U CN201699584U CN 201699584 U CN201699584 U CN 201699584U CN 2010202340113 U CN2010202340113 U CN 2010202340113U CN 201020234011 U CN201020234011 U CN 201020234011U CN 201699584 U CN201699584 U CN 201699584U
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Abstract
The utility model relates to a high efficiency step-up converter for solar distributed power generation, which comprises a coupling inductance first winding, a main power switch tube, a drain electrode and a parallel capacitor on a source electrode which are connected on the main power switch tube in parallel, a clamping switch tube and a clamping capacitor connected with the clamping switch tube drain electrode in series, a doubler circuit composed of a freewheel diode parallelly connected at both ends of a circuit connected with a coupling inductance second winding and a doubler capacitor in series, and an output loop consisting of an output diode and an output capacitor; and the utility model has the advantages: the doubler circuit is utilized to realize high gain output of the converter, a series circuit consisting of the clamping switch tube and the clamping capacitor is used to absorb and transfer leakage inductance energy of coupling inductance losslessly, and the main power switch tube is turned on with zero voltage, the parallel capacitor is used to turn off the main power switch tube with zero voltage, and the clamping switch tube can be turned on and off with zero voltage by utilizing the gate electrode arrangement of the main power switch tube and the clamping switch tube.
Description
Technical field:
The utility model relates to a kind of DC-to-DC converter that is used for solar energy power generating, more specifically to a kind of high efficiency boost converter that is used for the distributed solar generating.
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-to-DC converter only has the duty ratio decision, and 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 have been studied in succession by additional active power switch or passive device, 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.
The utility model content:
The purpose of this utility model be provide at the prior art weak point a kind of rational in infrastructure, output voltage gain is high, the power device current ripples is little, power switch pipe quantity is few, and the high efficiency boost converter that is used for the distributed solar generating of noenergy loss.
The purpose of this utility model is to realize by following measure: a kind of high efficiency boost converter that is used for the distributed solar generating, it is characterized in that, comprise coupling inductance first winding, master power switch pipe and be connected in parallel on the drain electrode of master power switch pipe and the shunt capacitance on the source electrode, clamp switch pipe and the clamping capacitance that is connected with clamp switch pipe drain electrode serial connection, be attempted by the voltage-multiplying circuit that the circuit two ends of coupling inductance second winding and multiplication of voltage capacitance series are formed by fly-wheel diode, the output loop of forming by output diode and output capacitance; One end of described coupling inductance first winding links to each other with power positive end, the other end of coupling inductance first winding links to each other with the source electrode of the drain electrode of master power switch pipe and clamp switch pipe, the input of voltage-multiplying circuit links to each other with the source electrode of clamp switch pipe, the output of voltage-multiplying circuit links to each other with the anode of the output diode of output loop, the negative electrode of the output diode forming circuit output that links to each other with an end of output capacitance.
Compared with prior art, the high efficiency boost converter that is used for the distributed solar generating that the utility model proposes has following advantage: the present invention utilizes voltage-multiplying circuit to realize the high-gain output of converter, the series circuit that utilizes clamp switch pipe and clamping capacitance to form nondestructively absorbs and has shifted the leakage inductance energy of coupling inductance, and the no-voltage that has realized the master power switch pipe is open-minded, utilize shunt capacitance to realize the no-voltage shutoff of master power switch pipe, utilize the gate pole arrangement of master power switch pipe and clamp switch pipe, the no-voltage that has realized the clamp switch pipe is opened with no-voltage and is turn-offed, need not extra inductance element, thereby add ons is few, simple in structure, cost is low, need not extra testing circuit, noenergy losser in the circuit, can improve the output gain and the circuit efficiency of converter, and in the commutation course, no-voltage overshoot when power switch pipe turn-offs, no current overshoot when fly-wheel diode turn-offs is applicable to the high gain and high efficiency of low pressure input high pressure output and the small-power distributed solar occasion of generating electricity by way of merging two or more grid systems.
Description of drawings:
Fig. 1 is the utility model embodiment electrical principle schematic diagram.
Embodiment:
Below in conjunction with accompanying drawing embodiment is elaborated:
A kind of high efficiency boost converter that is used for the distributed solar generating, it is characterized in that, comprise coupling inductance first winding L 1, master power switch pipe S and be connected in parallel on the drain electrode of master power switch pipe and the shunt capacitance Cs on the source electrode, clamp switch pipe Sc and the clamping capacitance Cc that is connected with clamp switch pipe drain electrode serial connection, be attempted by the voltage-multiplying circuit that circuit two ends that coupling inductance second winding L 2 is connected in series with multiplication of voltage capacitor C m are formed by sustained diode s, the output loop of forming by output diode Do and output capacitance Co; One end of described coupling inductance first winding L 1 links to each other with power supply Vin anode, the other end of coupling inductance first winding L 1 links to each other with the drain electrode of master power switch pipe S and the source electrode of clamp switch pipe, the input of voltage-multiplying circuit links to each other with the source electrode of clamp switch pipe Sc, the output of voltage-multiplying circuit links to each other with the anode of the output diode Do of output loop, the negative electrode of the output diode Do forming circuit output end vo ut that links to each other with the end of output capacitance Co.
Operation principle of the present utility model is as follows: there are two kinds of courses of work in the high efficiency boost converter that is used for the distributed solar generating, i.e. commutation course between commutation course between power switch tube S shutoff and clamp switch pipe Sc open and clamp switch pipe Sc shutoff and power switch tube S are opened.Division is as follows:
The change of current between power switch tube S shutoff and clamp switch pipe Sc open:
Before the change of current, circuit is in power switch tube S and sustained diode s conducting, the steady-working state that clamp switch pipe Sc and output diode Do turn-off.When master power switch pipe S turn-offed, because the existence of shunt capacitance Cs, the voltage of master power switch pipe S was started from scratch and is risen so that certain slope is linear, and promptly master power switch pipe S has realized the no-voltage shutoff.When the voltage of master power switch pipe S rises to certain value, diode is open-minded in the clamp switch pipe Sc body, voltage between clamp switch pipe Sc drain electrode and source electrode is zero, the leakage inductance energy of coupling inductance is transferred on the clamping capacitance Cc, after diode is opened in the body of clamp switch pipe Sc, provide the gate electrode drive signals of clamp switch Sc, realized that the no-voltage of clamp switch pipe Sc is open-minded.In this process, the electric current of sustained diode s drops to zero by certain value with certain slope, and sustained diode s turn-offs.And the voltage at output diode Do two ends drops to zero gradually, output diode Do conducting.Afterwards, circuit enters circuit and enters main power tube S shutoff, and Sc is open-minded for the clamp switch pipe, the steady operational status that sustained diode s turn-offs and output diode Do opens.
The change of current between clamp switch pipe Sc shutoff and power switch tube S are opened:
Before the change of current, circuit is in main power tube S and sustained diode s turn-offs, the steady-working state of clamp switch pipe Sc and output diode Do conducting.When clamp switch pipe Sc turn-offed, the voltage of clamp switch pipe Sc was started from scratch and is risen so that certain slope is linear, and promptly clamp switch pipe Sc has realized the no-voltage shutoff.The voltage of master power switch pipe S drops to zero from certain value with certain slope linearity, and diode current flow in the body of master power switch pipe S provides the gate electrode drive signals of master power switch pipe S then, has realized that the no-voltage of master power switch pipe S is open-minded.In this process, the electric current of output diode Do drops to zero from certain value with certain slope, and output diode Do turn-offs.And the voltage at sustained diode s two ends drops to zero gradually, sustained diode s conducting.Afterwards, circuit enters main power tube S conducting, and clamp switch pipe Sc turn-offs, the steady operational status that sustained diode s conducting and output diode Do turn-off.
The foregoing description does not constitute restriction of the present utility model, and all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within the protection range of the present utility model.
Claims (1)
1. one kind is used for the high efficiency boost converter that distributed solar generates electricity, it is characterized in that, comprise coupling inductance first winding, master power switch pipe and be connected in parallel on the drain electrode of master power switch pipe and the shunt capacitance on the source electrode, clamp switch pipe and the clamping capacitance that is connected with clamp switch pipe drain electrode serial connection, be attempted by the voltage-multiplying circuit that the circuit two ends of coupling inductance second winding and multiplication of voltage capacitance series are formed by fly-wheel diode, the output loop of forming by output diode and output capacitance; One end of described coupling inductance first winding links to each other with power positive end, the other end of coupling inductance first winding links to each other with the source electrode of the drain electrode of master power switch pipe and clamp switch pipe, the input of voltage-multiplying circuit links to each other with the source electrode of clamp switch pipe, the output of voltage-multiplying circuit links to each other with the anode of the output diode of output loop, the negative electrode of the output diode forming circuit output that links to each other with an end of output capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202340113U CN201699584U (en) | 2010-06-22 | 2010-06-22 | High efficiency step-up converter for solar distributed power generation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202340113U CN201699584U (en) | 2010-06-22 | 2010-06-22 | High efficiency step-up converter for solar distributed power generation |
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| Publication Number | Publication Date |
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| CN201699584U true CN201699584U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202340113U Expired - Fee Related CN201699584U (en) | 2010-06-22 | 2010-06-22 | High efficiency step-up converter for solar distributed power generation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158090A (en) * | 2011-03-04 | 2011-08-17 | 浙江大学 | Boost converter with built-in transformer and voltage-doubling unit of switching capacitor |
| CN102360907A (en) * | 2011-10-08 | 2012-02-22 | 东莞市光华实业有限公司 | Manufacturing method of solar inverse output transformer with high European efficiency |
| CN104506036A (en) * | 2015-01-04 | 2015-04-08 | 无锡市产品质量监督检验中心 | Double-power-input DC-DC converter applicable to photoelectric generation situation |
| CN105281569A (en) * | 2015-12-04 | 2016-01-27 | 厦门大学 | Single-phase high-gain boost converter |
| CN106788215A (en) * | 2016-12-30 | 2017-05-31 | 株洲中车时代电气股份有限公司 | For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic |
| CN107659144A (en) * | 2017-10-19 | 2018-02-02 | 金陵科技学院 | Boosting unit converter built in inductance |
| CN108494231A (en) * | 2018-05-22 | 2018-09-04 | 安徽省东科半导体有限公司 | A kind of solar cell synchronization diode |
| CN111900877A (en) * | 2020-06-29 | 2020-11-06 | 哈尔滨工程大学 | Soft-switching high-gain direct-current converter based on coupling inductor and boost capacitor |
| CN115714532A (en) * | 2022-11-08 | 2023-02-24 | 东北电力大学 | Double-switch direct-current boost converter based on coupling inductance voltage-multiplying unit and control method |
-
2010
- 2010-06-22 CN CN2010202340113U patent/CN201699584U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158090A (en) * | 2011-03-04 | 2011-08-17 | 浙江大学 | Boost converter with built-in transformer and voltage-doubling unit of switching capacitor |
| CN102360907A (en) * | 2011-10-08 | 2012-02-22 | 东莞市光华实业有限公司 | Manufacturing method of solar inverse output transformer with high European efficiency |
| CN102360907B (en) * | 2011-10-08 | 2012-10-24 | 东莞市光华实业有限公司 | Manufacturing method of solar inverse output transformer with high European efficiency |
| CN104506036A (en) * | 2015-01-04 | 2015-04-08 | 无锡市产品质量监督检验中心 | Double-power-input DC-DC converter applicable to photoelectric generation situation |
| CN104506036B (en) * | 2015-01-04 | 2017-05-31 | 无锡市产品质量监督检验中心 | Suitable for the dual power supply input direct-current DC converter of photovoltaic generation occasion |
| CN105281569A (en) * | 2015-12-04 | 2016-01-27 | 厦门大学 | Single-phase high-gain boost converter |
| CN106788215A (en) * | 2016-12-30 | 2017-05-31 | 株洲中车时代电气股份有限公司 | For the Sofe Switch dc/dc boost converter of the collecting and distributing power supply of photovoltaic |
| CN107659144A (en) * | 2017-10-19 | 2018-02-02 | 金陵科技学院 | Boosting unit converter built in inductance |
| CN107659144B (en) * | 2017-10-19 | 2020-11-03 | 金陵科技学院 | Inductor built-in boost unit converter |
| CN108494231A (en) * | 2018-05-22 | 2018-09-04 | 安徽省东科半导体有限公司 | A kind of solar cell synchronization diode |
| CN111900877A (en) * | 2020-06-29 | 2020-11-06 | 哈尔滨工程大学 | Soft-switching high-gain direct-current converter based on coupling inductor and boost capacitor |
| CN111900877B (en) * | 2020-06-29 | 2022-04-05 | 哈尔滨工程大学 | Soft-switching high-gain direct-current converter based on coupling inductor and boost capacitor |
| CN115714532A (en) * | 2022-11-08 | 2023-02-24 | 东北电力大学 | Double-switch direct-current boost converter based on coupling inductance voltage-multiplying unit and control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20130622 |