CN101247085B - Passive-clamp alternation and parallel connection boosting converter - Google Patents
Passive-clamp alternation and parallel connection boosting converter Download PDFInfo
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- CN101247085B CN101247085B CN2008100601845A CN200810060184A CN101247085B CN 101247085 B CN101247085 B CN 101247085B CN 2008100601845 A CN2008100601845 A CN 2008100601845A CN 200810060184 A CN200810060184 A CN 200810060184A CN 101247085 B CN101247085 B CN 101247085B
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Abstract
An active clamping high-gain alternate parallel voltage boosting convertor disclosed by the invention comprises two power switching diodes, two output diodes, two clamping diodes, an output capacitor and two coupling inductors. The two coupling inductors respectively comprise two windings. The present invention uses the second winding of two coupling inductors and two switching capacitors to realize the high-gain output of the convertor. The zero current switching-on of two power switching diodes is realized by the leakage inductance of two coupling inductors and the zero voltage switching-off of two power switching diodes is realized by the shunt capacitor existing in two power switching diodes themselves. The clamping circuit which is composed of two clamping diodes and two switching capacitors are used for nondestructively absorbing and transferring the energy of leakage inductance of two coupling inductors. The soft switching-off of two output diodes and two clamping diodes are realized with the leakage inductance of two coupling inductors, and the circuit does not include energy losing element and the output gain of the convertor and the circuit efficiency can be increased.
Description
Technical field
The present invention relates to dc dc converter, is a kind of passive-clamp alternation and parallel connection boosting converter specifically.
Background technology
Conventional booster type (Boost) crisscross parallel DC-to-DC converter, comprise two inductance, two fly-wheel diodes, two power switch pipes, the drain electrode of first power switch pipe links to each other with the anode of first diode and an end of first inductance, the drain electrode of second power switch pipe links to each other with the anode of second diode and an end of second inductance, and the other end of first inductance links to each other with the other end of second inductance.This boost interleaved parallel DC-to-DC converter output voltage gain is less, and the voltage stress of power switch pipe is bigger, and power switch pipe is hard switching work, and switching loss is bigger, and the reverse recovery current of fly-wheel diode is bigger, and reverse recovery loss is bigger.In recent years, studied some soft switch circuits in succession, mainly contained two kinds: a kind of is the soft switch of realizing power switch pipe by additional active power switch and devices such as passive inductance, electric capacity; Another kind is a soft switch of realizing power switch pipe by devices such as additional diode and passive inductance, electric capacity.Though the soft switch that can realize power switch pipe of these two kinds of methods, the additional circuit complexity, and can not reduce the voltage stress of power switch pipe, can not realize the high-gain function of converter.
Summary of the invention
It is little to the purpose of this invention is to provide the power switch pipe voltage stress, simple in structure, and cost is low, and the passive-clamp alternation and parallel connection boosting converter with high voltage gain of noenergy loss.
For reaching above-mentioned purpose, technical solution of the present invention is, passive-clamp alternation and parallel connection boosting converter comprises two power switch pipes, two clamp diodes, two output diodes, two switching capacities, an output capacitance and two coupling inductances, first coupling inductance has two windings, second coupling inductance has two windings, one end of first winding of first coupling inductance, one end of first winding of second coupling inductance and an end of first switching capacity, one end of second switch electric capacity links to each other with the anode of input power supply jointly, the other end of first winding of first coupling inductance links to each other with the anode of the drain electrode of first power switch pipe and first clamping diode, the source electrode of first power switch pipe links to each other with ground, the other end of first switching capacity links to each other with an end of second winding of first coupling inductance and the negative electrode of second clamp diode, the other end of first winding of second coupling inductance links to each other with the anode of the drain electrode of second power switch pipe and second clamping diode, the source electrode of second power switch pipe links to each other with ground, the other end of second switch electric capacity links to each other with an end of second winding of second coupling inductance and the negative electrode of first clamp diode, the other end of second winding of first coupling inductance links to each other with the anode of first output diode, the other end of second winding of second coupling inductance links to each other with the anode of second output diode, the negative electrode of first output diode links to each other with the negative electrode of second output diode and the anode of output capacitance, the negative terminal of output capacitance links to each other with ground, and the link of the link of first winding of above-mentioned first coupling inductance and first winding of second coupling inductance and second winding of first coupling inductance and first switching capacity is the end of the same name of first coupling inductance; The link of the link of first winding of second coupling inductance and first winding of first coupling inductance and second winding of second coupling inductance and second switch electric capacity is the end of the same name of second coupling inductance.
During work, utilize the switching capacity of second winding of two coupling inductances and series connection with it to realize the high-gain output of circuit; The shunt capacitance that the shunt capacitance and second power switch pipe that utilizes that first power switch pipe leaks, self exists between source electrode leaks, self exist between source electrode has realized that the no-voltage of first power switch pipe and second power switch pipe is turn-offed; Second switch electric capacity is collected the leakage inductance energy of first coupling inductance, and first switching capacity is collected the leakage inductance energy of second coupling inductance, and finally transfers to output, has realized the harmless absorption of clamp circuit.In whole switch periods, first, second power switch pipe can be realized zero current turning-on and no-voltage shutoff, utilize the leakage inductance of first, second coupling inductance to reduce the electric current fall off rate of first, second clamp diode and first, second output diode, thereby improved the reverse recovery characteristic of first, second clamp diode and first, second output diode.
Passive-clamp alternation and parallel connection boosting converter of the present invention, the switching capacity that utilizes second winding of two coupling inductances and connect has with it been realized the high-gain output of converter, the clamp circuit that utilizes first clamp diode and second switch electric capacity and second clamp diode and first switching capacity to form nondestructively absorbs and has shifted the leakage inductance energy of two coupling inductances, and realized first, the zero current turning-on of second power switch pipe, utilize first, the shunt capacitance that second power switch pipe self exists has realized first, the no-voltage of second power switch pipe is turn-offed, utilize first, the leakage inductance of second coupling inductance has realized first, second output diode and first, the soft shutoff of second clamp diode, 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.
Description of drawings
Fig. 1 is the circuit diagram of passive-clamp alternation and parallel connection boosting converter.
Embodiment
Referring to Fig. 1, passive-clamp alternation and parallel connection boosting converter of the present invention comprises two power switch tube S 1, S2, two clamp diode Dc1, Dc2, two output diode Do1, Do2, two switching capacity Cc1, Cc2, an output capacitance Co and two coupling inductances, first coupling inductance has two winding L 1a, L1b, second coupling inductance has two winding L 2a, L2b, the end of the first winding L 1a of first coupling inductance, the end of the first winding L 2a of second coupling inductance and the end of the first switching capacity Cc1, common and the input power supply V of the end of second switch capacitor C c2
InAnode link to each other, the other end of the first winding L 1a of first coupling inductance links to each other with the anode of the drain electrode of first power switch tube S 1 and the first clamping diode Dc1, the source electrode of first power switch tube S 1 links to each other with ground, the other end of the first switching capacity Cc1 links to each other with the end of the second winding L 1b of first coupling inductance and the negative electrode of the second clamp diode Dc2, equally, the other end of the first winding L 2a of second coupling inductance links to each other with the anode of the drain electrode of second power switch tube S 2 and the second clamping diode Dc2, the source electrode of second power switch tube S 2 links to each other with ground, the other end of second switch capacitor C c2 links to each other with the end of the second winding L 2b of second coupling inductance and the negative electrode of the first clamp diode Dc1, the other end of the second winding L 1b of first coupling inductance links to each other with the anode of the first output diode Do1, the other end of the second winding L 2b of second coupling inductance links to each other with the anode of the second output diode Do2, the negative electrode of the first output diode Do1 links to each other with the negative electrode of the second output diode Do2 and the anode of output capacitance Co, and the negative terminal of output capacitance Co links to each other with ground.
There are four kinds of change of current situations in passive-clamp alternation and parallel connection boosting converter, i.e. the change of current between 1 shutoff of first power switch tube S and the first clamp diode Dc1 conducting; The change of current between the first output diode Do1 shutoff and the first switching tube S1 open; The change of current between 2 shutoffs of second power switch tube S and the second clamp diode Dc2 conducting; The change of current between the second output diode Do2 shutoff and second power switch tube S 2 are opened.Because the symmetry of circuit, only the commutation course with first power switch tube S 1 is that example is analyzed as follows:
First power switch tube S 1 is turn-offed the commutation course with the first clamp diode Dc1 conducting:
Before the change of current, circuit is in first power switch tube S 1, second power switch tube S 2 is open-minded, the steady-working state that the first clamp diode Dc1, the first output diode Do1, the second clamp diode Dc2, the second output diode Do2 turn-off.When first power switch tube S 1 was turn-offed, because self there is shunt capacitance in first power switch tube S 1, the voltage of first power switch tube S 1 was started from scratch and is risen so that certain slope is linear, and promptly first power switch tube S 1 has realized the no-voltage shutoff.When the voltage of first power switch tube S 1 rose to certain value, the first clamp diode Dc1 was open-minded, and the leakage inductance energy of first coupling inductance is transferred on the second switch capacitor C c2.In this process, the first output diode Do1 conducting, the coupling inductance energy begins to shift to the output of circuit.When the leakage inductance energy of first coupling inductance was all transferred on the second switch capacitor C c2, the first clamp diode Dc1 turn-offed.Because the leakage inductance of first coupling inductance has limited the electric current fall off rate of the first clamp diode Dc1, the reverse recovery characteristic of the first clamp diode Dc1 improves.Afterwards, circuit enters the first power tube S1 and turn-offs, the steady operational status that the first clamp diode Dc1 turn-offs, the first output diode Do1 opens.
First power switch tube S 1 is opened the commutation course that turn-offs with the first output diode Do1:
Before first power switch tube S 1 was opened, the leakage inductance electric current of first coupling inductance was zero, the stable operation operating state that the first clamp diode Dc1 turn-offs, the first output diode Do1 is in conducting.When first power switch tube S 1 was opened, because the existence of the leakage inductance of first coupling inductance, the electric current that flows through first power switch tube S 1 was started from scratch with the linear rising of certain slope, and promptly first power switch tube S 1 has realized zero current turning-on.The electric current of the first output diode Do1 begins to descend with certain slope from certain value, and when the electric current of the first output diode Do1 dropped to zero, the first output diode Do1 turn-offed.Like this, the reverse recovery current of the first output diode Do1 is zero, has reduced the reverse recovery loss that the first output diode Do1 brings greatly.Afterwards, circuit enters 1 conducting of first power switch tube S, the steady operational status that the first clamp diode Dc1, the first output diode Do1 turn-off.
Claims (1)
1. passive-clamp alternation and parallel connection boosting converter, it is characterized in that: comprise two power switch pipe (S1, S2), two clamp diode (Dc1, Dc2), two output diode (Do1, Do2), two switching capacity (Cc1, Cc2), an output capacitance (Co) and two coupling inductances, first coupling inductance has two winding (L1a, L1b), second coupling inductance has two winding (L2a, L2b), one end of first winding (L1a) of first coupling inductance, one end of first winding (L2a) of second coupling inductance and an end of first switching capacity (Cc1), one end of second switch electric capacity (Cc2) links to each other with the anode of input power supply jointly, the other end of first winding (L1a) of first coupling inductance links to each other with the anode of the drain electrode of first power switch pipe (S1) and first clamping diode (Dc1), the source electrode of first power switch pipe (S1) links to each other with ground, the other end of first switching capacity (Cc1) links to each other with an end of second winding (L1b) of first coupling inductance and the negative electrode of second clamp diode (Dc2), the other end of first winding (L2a) of second coupling inductance links to each other with the anode of the drain electrode of second power switch pipe (S2) and second clamping diode (Dc2), the source electrode of second power switch pipe (S2) links to each other with ground, the other end of second switch electric capacity (Cc2) links to each other with an end of second winding (L2b) of second coupling inductance and the negative electrode of first clamp diode (Dc1), the other end of second winding (L1b) of first coupling inductance links to each other with the anode of first output diode (Do1), the other end of second winding (L2b) of second coupling inductance links to each other with the anode of second output diode (Do2), the negative electrode of first output diode (Do1) links to each other with the negative electrode of second output diode (Do2) and the anode of output capacitance (Co), the negative terminal of output capacitance (Co) links to each other with ground, and the link of first winding (L1a) of above-mentioned first coupling inductance and first winding (L2a) of second coupling inductance and second winding (L1b) of first coupling inductance are the end of the same name of first coupling inductance with the link of first switching capacity (Cc1); The link of first winding (L2a) of second coupling inductance and first winding (L1a) of first coupling inductance and second winding (L2b) of second coupling inductance are the end of the same name of second coupling inductance with the link of second switch electric capacity (Cc2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100601845A CN101247085B (en) | 2008-03-14 | 2008-03-14 | Passive-clamp alternation and parallel connection boosting converter |
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| CN2008100601845A CN101247085B (en) | 2008-03-14 | 2008-03-14 | Passive-clamp alternation and parallel connection boosting converter |
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| CN101247085A CN101247085A (en) | 2008-08-20 |
| CN101247085B true CN101247085B (en) | 2010-07-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510726B (en) * | 2009-03-23 | 2010-09-29 | 浙江大学 | Passive clamping voltage boosting type interleave parallel connection converter implemented by coupling inductance and switch capacitance |
| CN101867297B (en) * | 2010-07-02 | 2012-02-29 | 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 |
| CN103023315A (en) * | 2011-09-28 | 2013-04-03 | 艾默生网络能源有限公司 | Boost circuit |
| CN104184322B (en) * | 2014-09-15 | 2016-04-20 | 盐城工学院 | A kind of converter of symmetrical structure |
| CN104201888B (en) * | 2014-09-15 | 2016-05-11 | 盐城工学院 | A kind of current control method of symmetrical structure converter |
| CN104506041A (en) * | 2014-12-26 | 2015-04-08 | 杭州禾迈电力电子技术有限公司 | High-gain passive lossless clamped inverter comprising three-winding built-in transformer structure |
| CN104702116B (en) * | 2015-04-01 | 2017-03-29 | 哈尔滨工业大学 | Active coupling inductance network boost converter |
| CN109698618B (en) * | 2019-01-04 | 2021-02-26 | 国网山东省电力公司淄博供电公司 | High-gain boost converter realized by coupling inductor boost unit and control method thereof |
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