CN100563087C - A kind of isolation type active clamping alternation parallel DC/DC converter - Google Patents
A kind of isolation type active clamping alternation parallel DC/DC converter Download PDFInfo
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- CN100563087C CN100563087C CNB2008100618136A CN200810061813A CN100563087C CN 100563087 C CN100563087 C CN 100563087C CN B2008100618136 A CNB2008100618136 A CN B2008100618136A CN 200810061813 A CN200810061813 A CN 200810061813A CN 100563087 C CN100563087 C CN 100563087C
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- violent change
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- power switch
- change depressor
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Abstract
Isolation type active clamping alternation parallel DC-to-DC converter disclosed by the invention comprises two power switch pipes, two output diodes, two clamping diodes, an auxiliary power switching tube, a clamping capacitance, two switching capacities, an output capacitance and two anti-violent change depressors.Two anti-violent change depressors have two windings respectively.The present invention utilizes second winding of two anti-violent change depressors and the raising that two switching capacities have been realized converter power output grade.Only use the leakage inductance energy of an auxiliary switch and two anti-violent change depressors of a clamping capacitance absorption, utilize the gate pole arrangement of shunt capacitance that two power switch pipes self exist and two power switch pipes and auxiliary switch, the no-voltage that has realized two power switch pipes and auxiliary switch is opened with no-voltage and to be turn-offed, utilize the leakage inductance of two anti-violent change depressors to realize the soft shutoff of two output diodes and two clamping diodes, noenergy losser in the circuit can improve the output gain and the circuit efficiency of converter.
Description
Technical field
The present invention relates to DC-DC converter, is isolation type active clamping alternation parallel DC/DC converter specifically.
Background technology
Conventional flyback (Flyback) crisscross parallel DC-DC converter, comprise two anti-violent change depressors, two output diodes, two power switch pipes, one end of first winding of one end of first winding of the first anti-violent change depressor and the second anti-violent change depressor links to each other with the anode of input power supply jointly, the other end of first winding of the first anti-violent change depressor links to each other with the drain electrode of first power switch pipe, and the other end of first winding of the second anti-violent change depressor links to each other with the drain electrode of second power switch pipe.One end of second winding of one end of second winding of the first anti-violent change depressor and the second anti-violent change depressor links to each other with the negative terminal of output capacitance jointly, the other end of second winding of the first anti-violent change depressor links to each other with the anode of first output diode, the other end of second winding of the second anti-violent change depressor links to each other with the anode of second output diode, and the negative electrode of first and second output diode links to each other with the anode of output capacitance jointly.This crisscross parallel DC-DC converter power output grade is less, and the current stress of power switch pipe is bigger, and power switch pipe is hard switching work, and switching 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 these two kinds of methods can realize the soft switch of power switch pipe, the additional circuit complexity, and can not reduce the voltage stress of power switch pipe, can not improve the power output grade of converter.
Summary of the invention
It is little, simple in structure to the purpose of this invention is to provide a kind of power switch pipe voltage stress, and switching tube quantity is few, and cost is low, and the isolation type active clamping alternation parallel DC with the high-output power grade/DC converter of noenergy loss.
For reaching above-mentioned purpose, technical solution of the present invention is, isolation type active clamping alternation parallel DC/DC converter comprises two power switch pipes, two clamping diodes, two output diodes, an auxiliary power switching tube, a clamping capacitance, two switching capacities, an output capacitance and two anti-violent change depressors, the first anti-violent change depressor has two windings, the second anti-violent change depressor has two windings, one end of first winding of the first anti-violent change depressor links to each other with the anode of input power supply jointly with the drain electrode of second power switch pipe, the other end of first winding of the first anti-violent change depressor links to each other with the source electrode of the drain electrode of first power switch pipe and auxiliary power switching tube, one end of first winding of the second anti-violent change depressor links to each other with the source electrode of an end of clamping capacitance and second power switch pipe, the other end of clamping capacitance links to each other with the drain electrode of auxiliary power switching tube, the other end of first winding of the second anti-violent change depressor and the source electrode of first power switch pipe link to each other with the ground of input power supply, one end of second winding of the first anti-violent change depressor links to each other with an end of the anode of first clamping diode and second switch electric capacity, the negative electrode of first clamping diode links to each other with the anode of first output diode and an end of first switching capacity, one end of second winding of the second anti-violent change depressor links to each other with the other end of the anode of second clamping diode and first switching capacity, the negative electrode of second clamping diode links to each other with the anode of second output diode and the other end of second switch electric capacity, 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, and the other end of the other end of the negative terminal of output capacitance and second winding of the first anti-violent change depressor and second winding of the second anti-violent change depressor links to each other with the ground of output jointly; The earth terminal of second winding of first winding of the above-mentioned first anti-violent change depressor and the drain electrode link of second power switch pipe and the first anti-violent change depressor is the end of the same name of the first anti-violent change depressor; The earth terminal of second winding of first winding of the second anti-violent change depressor and the link of clamping capacitance and the second anti-violent change depressor is the end of the same name of the second anti-violent change depressor.
During work, utilize the switching capacity of second winding of two anti-violent change depressors and series connection with it to realize the high-output power grade 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; Clamping capacitance is collected the leakage inductance energy of the first anti-violent change depressor and the second anti-violent change depressor, and finally transfers to input, has realized the harmless absorption of clamp circuit.In whole switch periods, by controlling the gate pulse of first power switch pipe, second power switch pipe, auxiliary switch, can make first, second power switch pipe, auxiliary switch realization no-voltage is opened with no-voltage and is turn-offed.
Isolation type active clamping alternation parallel DC of the present invention/DC converter, the switching capacity that utilizes second winding of two anti-violent change depressors and connect has with it improved the power output grade of converter, the series circuit that has only used an auxiliary switch and clamping capacitance to form just can nondestructively absorb and shift the leakage inductance energy of two anti-violent change depressors, and realized first, the no-voltage of second power switch pipe is open-minded, utilize first, the shunt capacitance of second power switch pipe has realized first, the no-voltage of second power switch pipe is turn-offed, utilize first, the gate pole arrangement of second power switch pipe and auxiliary switch, the no-voltage that has realized auxiliary switch is opened with no-voltage and is turn-offed, need not extra inductance element, thereby add ons is few, simple in structure, active device quantity is few, 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 isolation type active clamping alternation parallel DC/DC converter.
Embodiment
Referring to Fig. 1, isolation type active clamping alternation parallel DC of the present invention/DC converter comprises two power switch tube S 1, S2, two clamping diode Dc1, Dc2, two output diode Do1, Do2, an auxiliary power switching tube Sc, a clamping capacitance Cc, two switching capacity Cf1, Cf2, an output capacitance Co and two anti-violent change depressors, the first anti-violent change depressor has two winding L 1a, L1b, the second anti-violent change depressor has two winding L 2a, L2b, the common and input power supply V of the end of the first winding L 1a of the first anti-violent change depressor and the drain electrode of second power switch tube S 2
InAnode link to each other, the other end of the first winding L 1a of the first anti-violent change depressor links to each other with the drain electrode of the drain electrode of first power switch tube S 1 and auxiliary power switching tube Sc, the end of the first winding L 2a of the second anti-violent change depressor links to each other with the end of clamping capacitance Cc and the source electrode of second power switch tube S 2, the other end of clamping capacitance Cc links to each other with the source electrode of auxiliary power switching tube Sc, the other end of the first winding L 2a of the second anti-violent change depressor and the source electrode of first power switch tube S 1 link to each other with the ground of input power supply, the end of the second winding L 1b of the first anti-violent change depressor links to each other with the end of the anode of the first clamping diode Dc1 and second switch capacitor C f2, the negative electrode of the first clamping diode Dc1 links to each other with the anode of the first output diode Do1 and the end of the first switching capacity Cf1, the end of the second winding L 2b of the second anti-violent change depressor links to each other with the anode of the second clamping diode Dc2 and the other end of the first switching capacity Cf1, the negative electrode of the second clamping diode Dc2 links to each other with the anode of the second output diode Do2 and the other end of second switch capacitor C f2, 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 other end of the other end of the negative terminal of output capacitance Co and the second winding L 1b of the first anti-violent change depressor and the second winding L 2b of the second anti-violent change depressor links to each other with the ground of output jointly; The earth terminal of the second winding L 1b of the first winding L 1a of the above-mentioned first anti-violent change depressor and the drain electrode link of second power switch tube S 2 and the first anti-violent change depressor is the end of the same name of the first anti-violent change depressor; The earth terminal of the second winding L 2b of the first winding L 2a of the second anti-violent change depressor and the link of clamping capacitance Cc and the second anti-violent change depressor is the end of the same name of the second anti-violent change depressor.
Cs1, Cs2 are respectively the shunt capacitance of first, second power switch tube S 1, S2 self existence among the figure.
There are four kinds of change of current situations in isolation type active clamping alternation parallel DC/DC converter, the change of current between promptly 1 shutoff of first power switch tube S and auxiliary switch Sc open; The change of current between the auxiliary switch Sc shutoff and the first switching tube S1 open; The change of current between 2 shutoffs of second power switch tube S and auxiliary switch Sc open; The change of current between the auxiliary switch Sc 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 of opening with auxiliary switch Sc:
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 clamping diode Dc1, the first output diode Do1, the second clamping 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 rises to certain value, diode is open-minded in the body of auxiliary switch Sc, the voltage of auxiliary switch Sc is zero, the leakage inductance energy of the first anti-violent change depressor is transferred on the clamping capacitance Cc, after diode is opened in the body of auxiliary switch Sc, provide the gate signal of auxiliary switch Sc, realized that the no-voltage of auxiliary switch Sc is open-minded.In this process, the first clamping diode Dc1, the second output diode Do2 conducting, anti-violent change depressor energy begins to shift to the output of circuit.Afterwards, circuit enters the first power tube S1 and turn-offs, and auxiliary switch Sc is open-minded, the steady operational status that the first clamping diode Dc1, the second output diode Do2 open.
Auxiliary switch Sc turn-offs the commutation course of opening with first power switch tube S 1:
Before auxiliary switch Sc turn-offs, the leakage inductance of the first anti-violent change depressor and clamping capacitance Cc resonance, the first clamping diode Dc1, the second output diode Do2 are in the stable operation operating state of conducting.When auxiliary switch Sc turn-offed, because self there is shunt capacitance in first power switch tube S 1, auxiliary switch Sc voltage was started from scratch and is risen so that certain slope is linear, and promptly auxiliary switch Sc has realized the no-voltage shutoff.Shunt capacitance resonance on the leakage inductance of the first anti-violent change depressor and first power switch tube S 1, the shunt capacitance energy shifts to the leakage inductance of the first anti-violent change depressor on first power switch tube S 1, the voltage of first power switch tube S 1 begins to descend with certain slope from certain value, when the voltage of first power switch tube S 1 drops to zero, diode is open-minded in the body of first power switch tube S 1, after diode is opened in the body of first power switch tube S 1, provide first power switch tube S, 1 gate signal, realized that the no-voltage of first power switch tube S 1 is open-minded.The electric current of the first clamping diode Dc1, the second output diode Do2 begins to descend with certain slope from certain value, when the electric current of the first clamping diode Dc1, the second output diode Do2 dropped to zero, the first clamping diode Dc1, the second output diode Do2 turn-offed.Like this, the reverse recovery current of the first clamping diode Dc1, the second output diode Do2 is zero, has reduced the reverse recovery loss that the first clamping diode Dc1, the second output diode Do2 bring greatly.Afterwards, circuit enters 1 conducting of first power switch tube S, the steady operational status that the first clamping diode Dc1, the second output diode Do2 turn-off.
Claims (1)
1. isolation type active clamping alternation parallel DC/DC converter, it is characterized in that: comprise two power switch pipe (S1, S2), two clamping diode (Dc1, Dc2), two output diode (Do1, Do2), an auxiliary power switching tube (Sc), a clamping capacitance (Cc), two switching capacity (Cf1, Cf2), an output capacitance (Co) and two anti-violent change depressors, the first anti-violent change depressor has two winding (L1a, L1b), the second anti-violent change depressor has two winding (L2a, L2b), one end of first winding (L1a) of the first anti-violent change depressor links to each other with the anode of input power supply jointly with the drain electrode of second power switch pipe (S2), the other end of first winding (L1a) of the first anti-violent change depressor links to each other with the source electrode of the drain electrode of first power switch pipe (S1) and auxiliary power switching tube (Sc), one end of first winding (L2a) of the second anti-violent change depressor links to each other with the source electrode of an end of clamping capacitance (Cc) and second power switch pipe (S2), the other end of clamping capacitance (Cc) links to each other with the drain electrode of auxiliary power switching tube (Sc), the other end of first winding (L2a) of the second anti-violent change depressor and the source electrode of first power switch pipe (S1) link to each other with the ground of input power supply, one end of second winding (L1b) of the first anti-violent change depressor links to each other with an end of the anode of first clamping diode (Dc1) and second switch electric capacity (Cf2), the negative electrode of first clamping diode (Dc1) links to each other with the anode of first output diode (Do1) and an end of first switching capacity (Cf1), one end of second winding (L2b) of the second anti-violent change depressor links to each other with the other end of the anode of second clamping diode (Dc2) and first switching capacity (Cf1), the negative electrode of second clamping diode (Dc2) links to each other with the anode of second output diode (Do2) and the other end of second switch electric capacity (Cf2), 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), and the other end of the other end of the negative terminal of output capacitance (Co) and second winding (L1b) of the first anti-violent change depressor and second winding (L2b) of the second anti-violent change depressor links to each other with the ground of output jointly; First winding (L1a) of the above-mentioned first anti-violent change depressor is the end of the same name of the first anti-violent change depressor with the earth terminal of second winding (L1b) of the drain electrode link of second power switch pipe (S2) and the first anti-violent change depressor; First winding (L2a) of the second anti-violent change depressor is the end of the same name of the second anti-violent change depressor with the earth terminal of second winding (L2b) of the link of clamping capacitance (Cc) and the second anti-violent change depressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100618136A CN100563087C (en) | 2008-05-12 | 2008-05-12 | A kind of isolation type active clamping alternation parallel DC/DC converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100618136A CN100563087C (en) | 2008-05-12 | 2008-05-12 | A kind of isolation type active clamping alternation parallel DC/DC converter |
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| CN101282089A CN101282089A (en) | 2008-10-08 |
| CN100563087C true CN100563087C (en) | 2009-11-25 |
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| CN103973118A (en) * | 2014-05-04 | 2014-08-06 | 上海索来威新能源技术有限公司 | Efficient isolation converter suitable for low-voltage photovoltaic power generation system and control method of efficient isolation converter |
| CN104104232A (en) * | 2014-07-02 | 2014-10-15 | 三峡大学 | Isolated high-gain DC/DC (Direct Current) converter |
| FR3042661B1 (en) * | 2015-10-16 | 2017-12-08 | Valeo Systemes De Controle Moteur | DC / DC ISOLATED CONVERTER |
| CN106549563A (en) * | 2017-01-24 | 2017-03-29 | 杭州中恒派威电源有限公司 | A kind of flyback exports high-voltage diode replacement circuit |
| CN108696137B (en) * | 2018-06-06 | 2023-10-27 | 三峡大学 | Modularized high-boost isolation type DC/DC converter with active clamping circuit |
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2008
- 2008-05-12 CN CNB2008100618136A patent/CN100563087C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 新型交错并联反激变换器的稳定性研究. 王红梅，龚春英，唐春霞.微机算机信息，第23卷第7-2期. 2007 |
| 新型交错并联反激变换器的稳定性研究. 王红梅，龚春英，唐春霞.微机算机信息，第23卷第7-2期. 2007 * |
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| CN101282089A (en) | 2008-10-08 |
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