CN105281569A - Single-phase high-gain boost converter - Google Patents
Single-phase high-gain boost converter Download PDFInfo
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- CN105281569A CN105281569A CN201510883833.1A CN201510883833A CN105281569A CN 105281569 A CN105281569 A CN 105281569A CN 201510883833 A CN201510883833 A CN 201510883833A CN 105281569 A CN105281569 A CN 105281569A
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Abstract
A single-phase high-gain boost converter is provided with a power supply, a power switch tube, an output capacitor, a first switch capacitor, a second switch capacitor, a first fly-wheel diode, a second fly-wheel diode, a clamping diode, a clamping capacitor, an output diode and a coupling inductor. The coupling inductor comprises a primary winding and a secondary winding. One end of the primary winding is connected with a power supply positive electrode, the other end of the primary winding is connected with the drain electrode of the power switch tube and one end of the first switch capacitor, the cathode of the clamping diode is connected with one end of the clamping capacitor and the anode of the first fly-wheel diode, and the other end of the first switch capacitor is connected with the anode of the second fly-wheel diode and one end of the secondary winding. The other end of the secondary winding is connected with the cathode of the first fly-wheel diode and one end of the second switch capacitor. The other end of the second switch capacitor is connected with the cathode of the second fly-wheel diode and the anode of the output diode. The cathode of the output diode is connected with one end of the output capacitor. The other end of the output capacitor is connected with the negative electrode of the power supply and the source electrode of the power switch tube.
Description
Technical field
The present invention relates to DC-DC converter technique field, especially relate to a kind of single-phase high-gain boost converter.
Background technology
Parallel network power generation is the important way that current people use solar energy.The centralized photovoltaic parallel in system of tradition is made up of many solar panels be closely connected, and first these cell panels divide into groups to connect, and be then together in parallel formation photovoltaic array.The direct current that photovoltaic array produces can flow to and be positioned at the other centralized combining inverter in cell panel side, completes DC/AC conversion and is connected to electrical network, and find out maximal power tracing point to optimize the efficiency of photovoltaic parallel in system by its inverter.Along with technology reaches its maturity and development, centralized grid-connected photovoltaic system Problems existing also causes concern gradually.
(1) in centralized grid-connected photovoltaic system, the fault of single inverter may cause the collapse of whole system, and the energy that during device maintenance, photovoltaic array produces is wasted.
(2) extensibility of centralized grid-connected system is poor.
(3) MPPT maximal power tracing cannot take into account every block photovoltaic panel, makes gross output reach maximum.
For centralized grid-connected system Problems existing, Miniature inverter grid-connected system and series direct current module grid-connected system are that the distributed grid-connected scheme of representative becomes current study hotspot.
But distributed power generation module output voltage is low, and common DC bus voltage is standing fixes on 200V or 400V, so need to insert a high-gain, high efficiency, high-performance DC-DC converter between these electricity generation module and common DC bus.
In recent years, for improving the voltage gain of converter, progressively develop two kinds of boosting modes, a kind of is the mode adopting tandem tap electric capacity, the method multiple switching capacity that needs to connect realizes high-gain, and there is current spike in charge circuit, electromagnetic interference is large, the more important thing is that output voltage not easily regulates; Another kind of mode adopts coupling inductance boosting, and under which, output diode voltage stress is higher, have impact on the efficiency of converter, and needs to increase extra absorbing circuit, and circuit is complicated.For solving Sofe Switch problem, in succession have studied some soft switch circuits, mainly containing two kinds: a kind of is the Sofe Switch being realized power switch pipe by devices such as additional diode and passive inductance, electric capacity; Another kind is the Sofe Switch being realized power switch pipe by devices such as additional diode and passive inductance, electric capacity.Although these two kinds of methods can realize the Sofe Switch of power tube switching tube, additional circuit is complicated, and can not reduce the voltage stress of power switch pipe.
Chinese patent CN103490628A discloses a kind of single-phase high-gain boost converter, mainly comprises the voltage transfer circuit, coupling inductance booster circuit and the output circuit that connect successively.Described voltage transfer circuit comprises the first inductance, switching tube and the first electric capacity; Described coupling inductance booster circuit comprises former limit winding and vice-side winding, the second electric capacity, the 3rd electric capacity, the first diode and second diode of coupling inductance; Described output circuit comprises the 3rd diode, the 4th electric capacity and load.
Summary of the invention
The object of the present invention is to provide a kind of power switch pipe zero current turning-on, high-gain to export and low voltage stress, a kind of single-phase high-gain boost converter of the reverse-recovery problems of diode when turning off can being solved.
The present invention is provided with power supply, power switch pipe, output capacitance, the first switching capacity, second switch electric capacity, the first fly-wheel diode, the second fly-wheel diode, clamping diode, clamping capacitance, output diode and coupling inductance; Described coupling inductance is double winding coupling inductance, and described double winding coupling inductance comprises a former limit winding and a vice-side winding;
One end of the former limit winding of described coupling inductance is connected with the positive pole of described power supply, the other end of former limit winding of described coupling inductance is connected with the drain electrode of described power switch pipe one end with described first switching capacity, the negative electrode of clamping diode and one end of clamping capacitance and the first fly-wheel diode anode be connected, the other end of described first switching capacity is connected with one end of the vice-side winding of described coupling inductance with the anode of described second fly-wheel diode; The other end of the vice-side winding of described coupling inductance is connected with one end of described second switch electric capacity with the negative electrode of described first fly-wheel diode; The other end of described second switch electric capacity is connected with the negative electrode of described second fly-wheel diode and the anode of described output diode; The negative electrode of described output diode is connected with one end of described output capacitance, and the source electrode of the other end of described output capacitance and the negative pole of described power supply, described power switch pipe links together jointly.
The present invention also can be provided with a passive clamp circuit and clamping diode, one end of described passive clamp circuit is connected with the drain electrode of described power switch pipe, and the other end of described passive clamp circuit is connected with the anode of described first fly-wheel diode and one end of described clamping capacitance; The source electrode of the other end of described clamping capacitance and the negative pole of described power supply, described power switch pipe links together jointly.
Described passive clamp circuit comprises clamping diode, clamping capacitance, and described clamping diode is not connected on loop of power circuit.
When the present invention works, the leakage inductance of coupling inductance is utilized to realize the zero current turning-on of power switch pipe and the soft switching of clamping diode and the second fly-wheel diode; The high-gain utilizing the former limit winding of coupling inductance and vice-side winding to realize converter exports, utilize the first switching capacity, voltage gain that second switch electric capacity improves converter further and reduce the voltage stress of power device, simultaneously, in each switch periods, clamping capacitance collects the leakage inductance energy of coupling inductance, and finally transfer to load, realize the harmless operation of passive clamp circuit.
A kind of single-phase high-gain boost converter provided by the invention, make use of the leakage inductance of coupling inductance to realize the zero current turning-on of power switch pipe, and effectively controls current fall rate in diode, thus solves the reverse-recovery problems of diode when turning off.Utilize the passive clamp circuit of clamping diode and clamping capacitance composition to achieve the harmless transfer of leakage inductance energy, clamping diode is not connected on loop of power circuit, can reduce conduction loss.The high-gain utilizing the former and deputy limit winding of coupling inductance to achieve converter exports, two switching capacities are utilized to further increase the voltage gain of converter and reduce the voltage stress of power device, without the need to extra power tube switch and inductance element, attachment element is few, structure is simple, it is convenient to control, and noenergy losser in circuit, can improve the efficiency of boost converter.
Accompanying drawing explanation
Fig. 1 is the circuit composition diagram of the embodiment of the present invention.
Fig. 2 is the equivalent electric circuit of the embodiment of the present invention.
Fig. 3 is the switch mode 1 [t of the embodiment of the present invention
0t
1] equivalent circuit diagram.
Fig. 4 is the switch mode 2 [t of the embodiment of the present invention
1t
2] equivalent circuit diagram.
Fig. 5 is the switch mode 3 [t of the embodiment of the present invention
2t
3] equivalent circuit diagram.
Fig. 6 is the switch mode 4 [t of the embodiment of the present invention
3t
4] equivalent circuit diagram.
Fig. 7 is the switch mode 5 [t of the embodiment of the present invention
4t
5] equivalent circuit diagram.
Key waveforms figure when Fig. 8 is embodiment of the present invention work.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
See Fig. 1, a kind of boost converter provided by the invention, comprises a power tube (S), a clamping diode (D
c), a clamping capacitance (C
c), two fly-wheel diode (D
f1, D
f2), two switching capacity (C
f1, C
f2), an output diode (D
o), an output capacitance (C
o) and a double winding coupling inductance, it is characterized in that the former limit winding (L of coupling inductance
p) one end and power supply (V
in) anode be connected, the other end then with drain electrode, the clamping diode (D of power switch pipe (S)
c) anode and the first switching capacity (C
f1) one end be connected; Clamping diode (D
c) negative electrode and clamping capacitance (C
c) one end and the (D of the first fly-wheel diode
f1) anode be connected, the first switching capacity (C
f1) the other end and the (D of the second fly-wheel diode
f2) anode and the vice-side winding (L of double winding coupling inductance
s) one end be connected, the vice-side winding (L of double winding coupling inductance
s) the other end and the (D of the first fly-wheel diode
f1) negative electrode and second switch electric capacity (C
f2) one end be connected, second switch electric capacity (C
f2) the other end and the second fly-wheel diode (D
f2) negative electrode and output diode (D
o) anode be connected, output diode (D
o) negative electrode and output capacitance (C
o) one end be connected, output capacitance (C
o) the other end and power supply (V
in) negative terminal, the source electrode of power switch pipe (S) and clamping capacitance (C
c) the other end jointly link together.
The former limit winding (L of above-mentioned double winding coupling inductance
p) and power supply (V
in) link of anode and the vice-side winding (L of coupling inductance
s) and the first switching capacity (C
f1) link be the Same Name of Ends of coupling inductance.
As schematically shown in Figure 2, the leakage inductance reduction of coupling inductance secondary, to former limit, uses L to described a kind of single-phase high-gain boost converter equivalent electric circuit
krepresent.This converter mainly contains five operation modes.Its commutation course is analyzed as follows:
Mode 1 [t
0t
1]: as shown in Figure 3, power switch tube S is in opening state, output diode D
oreverse bias, clamping diode D
cbe in off state, sustained diode
f1, D
f2be in opening state, double winding coupling inductance L
mand leakage inductance L
kbe in the linear-charging state being transfused to voltage, clamping capacitance C
cenergy by the first sustained diode
f1to the first switching capacity C
f1transfer, coupling inductance secondary L
senergy by the second sustained diode
f1to second switch electric capacity C
f2transfer.
Mode 2 [t
1t
2]: as shown in Figure 4, at t
1moment, S
1turn off, coupling inductance primary current is to the parasitic capacitance linear-charging of power switch tube S.Clamping diode D
creverse voltage reduce and the drain-source voltage of S raise.
Mode 3 [t
2t
3]: as shown in Figure 5, at t
2moment, clamping diode D
creverse pressure drop is down to zero and is started conducting, and the primary current of coupling inductance is to clamping capacitance C
ccharging, power switch tube S still turns off, and its drain-source voltage is by clamping capacitance C
cpincers is put, double winding coupling inductance leakage inductance L
kin energy trasfer to clamping capacitance C
cin; Meanwhile, sustained diode
f1, D
f2be in off state, output diode D
oforward bias, the first switching capacity C
f1, second switch electric capacity C
f2start to shift to load with the energy of coupling inductance.
Mode 4 [t
3t
4]: as shown in Figure 6, at t
3moment, clamping diode D
cturn off, because cut-off current fall off rate is subject to coupling inductance leakage inductance L
kcontrol, its turn-off reversal recover problem do not exist, the first switching capacity C
f1, second switch electric capacity C
f2continue to shift to load with the energy of coupling inductance.
Mode 5 [t
4t
5]: as shown in Figure 7, at t
4in the moment, power switch tube S is open-minded, due to coupling inductance leakage inductance L
kexistence, S zero current turning-on.
Key waveforms figure when Fig. 8 is the work of this converter.
See Fig. 2, if the conducting duty ratio of power switch tube S is D
0, the turn ratio of vice-side winding to former limit winding of coupling inductance is N, then output voltage V
ofor:
So the output voltage gain of this single-phase high-gain boost converter is:
Above embodiment is only and illustrates that the principle of the invention is used, and the only execution mode of non-invention.
The invention provides a kind of single-phase high-gain boost converter, the high-gain utilizing the former and deputy limit winding of a double winding coupling inductance to achieve converter exports; Passive-clamp is achieved to main switch, and the energy of clamping capacitance can be fed to output; The voltage utilizing two switching capacities then further to expand converter exports, and also reduces the voltage stress of power device; Utilize the leakage inductance of double winding coupling inductance to realize the zero current turning-on of power switch pipe, and control current fall rate in diode, thus solve the reverse-recovery problems of diode when turning off.Converter realizes that gain is high, loss is little and also can obtain greater efficiency under underloading, and device used is few, and structure is comparatively succinct.
Claims (2)
1. a single-phase high-gain boost converter, it is characterized in that being provided with power supply, power switch pipe, output capacitance, the first switching capacity, second switch electric capacity, the first fly-wheel diode, the second fly-wheel diode, clamping diode, clamping capacitance, output diode and coupling inductance; Described coupling inductance is double winding coupling inductance, and described double winding coupling inductance comprises a former limit winding and a vice-side winding;
One end of the former limit winding of described coupling inductance is connected with the positive pole of described power supply, the other end of former limit winding of described coupling inductance is connected with the drain electrode of described power switch pipe one end with described first switching capacity, the negative electrode of clamping diode and one end of clamping capacitance and the first fly-wheel diode anode be connected, the other end of described first switching capacity is connected with one end of the vice-side winding of described coupling inductance with the anode of described second fly-wheel diode; The other end of the vice-side winding of described coupling inductance is connected with one end of described second switch electric capacity with the negative electrode of described first fly-wheel diode; The other end of described second switch electric capacity is connected with the negative electrode of described second fly-wheel diode and the anode of described output diode; The negative electrode of described output diode is connected with one end of described output capacitance, and the source electrode of the other end of described output capacitance and the negative pole of described power supply, described power switch pipe links together jointly.
2. a kind of single-phase high-gain boost converter as claimed in claim 1, it is characterized in that being provided with a passive clamp circuit and clamping diode, one end of described passive clamp circuit is connected with the drain electrode of described power switch pipe, and the other end of described passive clamp circuit is connected with the anode of described first fly-wheel diode and one end of described clamping capacitance; The source electrode of the other end of described clamping capacitance and the negative pole of described power supply, described power switch pipe links together jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510883833.1A CN105281569A (en) | 2015-12-04 | 2015-12-04 | Single-phase high-gain boost converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510883833.1A CN105281569A (en) | 2015-12-04 | 2015-12-04 | Single-phase high-gain boost converter |
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| Publication Number | Publication Date |
|---|---|
| CN105281569A true CN105281569A (en) | 2016-01-27 |
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ID=55150050
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510883833.1A Pending CN105281569A (en) | 2015-12-04 | 2015-12-04 | Single-phase high-gain boost converter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896978A (en) * | 2016-04-07 | 2016-08-24 | 厦门大学 | DC-DC converter applied to distributed grid-connected power generation front end |
| CN107086785A (en) * | 2017-06-27 | 2017-08-22 | 厦门大学 | A kind of Sofe Switch implementation method of single-phase high-gain boost converter |
| CN107959413A (en) * | 2017-11-22 | 2018-04-24 | 西安电子科技大学 | A kind of low high pressure converted power supply of integrated circuit |
| 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 |
| CN109921674A (en) * | 2019-04-12 | 2019-06-21 | 青岛理工大学 | A kind of modified Cockcroft-Walton single-stage can boost inversion electric appliance |
| CN109980918A (en) * | 2019-04-18 | 2019-07-05 | 福州大学 | A kind of reverse coupled high gain boost Cuk circuit and its fuzzy control method |
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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 |
| CN201699584U (en) * | 2010-06-22 | 2011-01-05 | 上海寅稞电子科技有限公司 | High efficiency step-up converter for solar distributed power generation |
| CN103490628A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-phase high-gain boost converter |
-
2015
- 2015-12-04 CN CN201510883833.1A patent/CN105281569A/en active Pending
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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 |
| CN201699584U (en) * | 2010-06-22 | 2011-01-05 | 上海寅稞电子科技有限公司 | High efficiency step-up converter for solar distributed power generation |
| CN103490628A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-phase high-gain boost converter |
Non-Patent Citations (1)
| Title |
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| 赵一: "耦合电感倍压单元高增益变流器拓扑形成方法", 《中国博士学位论文全文数据库（电子期刊）》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896978A (en) * | 2016-04-07 | 2016-08-24 | 厦门大学 | DC-DC converter applied to distributed grid-connected power generation front end |
| CN107086785A (en) * | 2017-06-27 | 2017-08-22 | 厦门大学 | A kind of Sofe Switch implementation method of single-phase high-gain boost converter |
| CN107959413A (en) * | 2017-11-22 | 2018-04-24 | 西安电子科技大学 | A kind of low high pressure converted power supply of integrated circuit |
| 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 |
| CN109921674A (en) * | 2019-04-12 | 2019-06-21 | 青岛理工大学 | A kind of modified Cockcroft-Walton single-stage can boost inversion electric appliance |
| CN109921674B (en) * | 2019-04-12 | 2023-10-31 | 南京信息工程大学 | Improved Cockcroft-Walton single-stage boosting inverter |
| CN109980918A (en) * | 2019-04-18 | 2019-07-05 | 福州大学 | A kind of reverse coupled high gain boost Cuk circuit and its fuzzy control method |
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Application publication date: 20160127 |
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