CN201821266U - Isolated-type active-clamp interleaved parallel two-way DC-DC converter - Google Patents
Isolated-type active-clamp interleaved parallel two-way DC-DC converter Download PDFInfo
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- CN201821266U CN201821266U CN2010205338539U CN201020533853U CN201821266U CN 201821266 U CN201821266 U CN 201821266U CN 2010205338539 U CN2010205338539 U CN 2010205338539U CN 201020533853 U CN201020533853 U CN 201020533853U CN 201821266 U CN201821266 U CN 201821266U
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- 238000002955 isolation Methods 0.000 claims description 15
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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
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
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Abstract
The utility model relates to an isolated-type active-clamp interleaved parallel two-way DC-DC converter which comprises four power switch tubes with reverse parallel diodes and parallel capacitors, two auxiliary switch tubes with reverse parallel diodes, two clamp capacitors, two high-voltage side capacitors and two dual-winding coupling inductors. The utility model reduces the ripples of the low-voltage side current by use of the low-voltage side parallel structure, achieves the zero-voltage switch-off of the power switch tubes by use of the parallel capacitors on the power switch tubes, achieves the zero-voltage switch-on of the power switch tubes by use of the leakage inductance of the coupling inductors, achieves the no-loss transfer of the leakage inductance energy by use of the auxiliary switch tubes and the reverse parallel diodes of the auxiliary switch tubes and the active clamp circuit formed by the clamp capacitors, and achieves the voltage increase/voltage reduction of the converter by use of the series connection structure of the high-voltage side windings of the two coupling inductors. The circuit structure is simple, all of the power switch tubes work in the soft on/off state, no energy-consuming element exists in the circuit, the efficiency of the converter is increased, and during the current transformation process, the switch devices are free of voltage overshoot.
Description
Technical field
The utility model relates to a kind of two-way DC-DC converter, especially the isolation type active clamping alternation parallel two-way DC-DC converter.
Background technology
In recent years, along with a large amount of consumption of traditional energies such as oil, coal, the pollution of shortage of energy sources and environment has become the focus in the world, and the development of regenerative resource and application are subjected to the extensive concern of countries in the world.In renewable energy system, there is fluctuation problem in the short time as electric energy that regenerative resource produced such as wind energy, solar energy, need to use energy storage system that the electricity generation system energy is steadily exported.Wherein, the core of energy storage system is exactly two-way DC-DC converter, can store excess energy in energy storage devices such as storage batterys when electricity generation system is exported excessive power, and when electricity generation system output energy shortage power output, satisfy the demand of load.Meanwhile, for the personal safety aspect being considered all there is the requirement of electrical isolation many application scenarios,, need to reduce A-battery side ripple for prolonging energy storage device such as storage battery useful life.So low input ripple, high step-up/down, high efficiency isolation type bidirectional transducer have important effect in the renewable energy power generation field.
Conventional Buck-Boost type two-way DC-DC converter is simple in structure, be widely used, but the power switch of this converter works in the hard switching state, and switching loss is bigger, and the voltage stress of power switch pipe is bigger, and the low-pressure side current ripples is big.Conventional Buck-Boost type crisscross parallel DC-to-DC reversible transducer has only reduced the ripple of low-pressure side electric current to a certain extent, but other problem still exists.Occurred some high step-up/down isolated DC-direct current reversible transducers in recent years in succession, had on the basis that builds on the full-bridge topology, and increased the soft switch that active clamping circuir is realized power switch pipe, used switching tube quantity is more, and complex structure; Have in addition to have proposed a kind of reversible transducer, but the extra control circuit of needs increase solves the voltage imbalance question between electric capacity based on half-bridge structure.
A kind of positive and negative sharp bidirectional DC-DC converter that relates to is disclosed among the Chinese patent CN1545195, by transformer, elementary winding N
S1With N
P1Intercouple and constitute normal shock transformer T
1By another transformer, elementary winding N
S2With N
P2Intercouple and constitute anti-violent change depressor T
2, two secondary winding N
S1With N
S2Tandem tap pipe S separately
1With S
2After be parallel to input DC power simultaneously.Two elementary winding N
P1With N
P2The series connection back is by rectification/inverter circuit and DC power supply V
2In parallel.Utilize technology such as active-clamp, RCD clamp, LCD clamp, ZVT reset to form gang's reversible transducer topology.
But this technology still has following deficiency:
1, two power grade differences that transformer is handled cause the loss of transformer to distribute inequality, and the voltage and current stress of power switch pipe is asymmetric, has increased the difficulty of heat management, has influenced the life-span of converter;
2, in this scheme, the normal shock transformer does not need air gap, and anti-violent change depressor need increase than air gaps, has increased the Design for Magnetic Elements complexity, is unfavorable for large-scale industrialization production;
3, in this scheme, the normal shock transformer only transmits energy to the high-pressure side when its corresponding switching tube conducting, and anti-violent change depressor only transmits energy to the high-pressure side when its corresponding switching tube turn-offs, cause the utilance of transformer not high, increase the volume of transformer, reduced system power density;
4, because the asymmetry of normal shock transformer and anti-violent change depressor is difficult to realize the crisscross parallel work of circuit, influenced the raising of system power grade.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, isolation type active clamping alternation parallel two-way DC-DC converter that the low-pressure side current ripples is little.
For achieving the above object, the utility model has following two kinds of technical solutions:
Scheme 1
Isolation type active clamping alternation parallel two-way DC-DC converter of the present utility model comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: two active clamping circuirs and two branch roads in parallel with the low-pressure side power supply, article one, parallel branch first power switch pipe anti-with band by the first low-pressure side winding and diode is connected and is constituted, first shunt capacitance in parallel at the first power switch pipe two ends, second parallel branch second power switch pipe anti-with band by the second low-pressure side winding and diode is connected and is constituted, second shunt capacitance in parallel at the second power switch pipe two ends; First active clamping circuir is connected in parallel on the first low-pressure side winding two ends or is connected in parallel on the source electrode and drain electrode of first power switch pipe, and its first auxiliary switch and the series connection of first clamping capacitance anti-by band and diode constitute; Second active clamping circuir is connected in parallel on the second low-pressure side winding two ends or is connected in parallel on the source electrode and drain electrode of second power switch pipe, and its second auxiliary switch and the series connection of second clamping capacitance anti-by band and diode constitute;
Described high-pressure side circuit comprises: the first high-pressure side winding, the second high-pressure side winding, the 3rd power switch pipe of being with anti-and diode, band anti-also the 4th power switch pipe, the first high-pressure side electric capacity and the second high-pressure side electric capacity of diode.Wherein the first high-pressure side winding and the first low-pressure side winding are all two windings in the coupling inductance, the second high-pressure side winding and the second low-pressure side winding are all two windings in another coupling inductance, serving as with reference to end all in the first low-pressure side winding and the second low-pressure side winding with same that end that extremely links to each other of low-pressure side power supply, the end of the same name that the first high-pressure side winding is corresponding with the first low-pressure side winding links to each other with the corresponding end of the same name of the second high-pressure side winding and the second low-pressure side winding, the other end of the first high-pressure side winding links to each other with the source electrode of the 4th power switch pipe and the drain electrode of the 3rd power switch pipe, the other end of the second high-pressure side winding links to each other with the end of the first high-pressure side electric capacity with the second high-pressure side electric capacity, the other end of the first high-pressure side electric capacity links to each other with the source electrode of the 3rd power switch pipe and an end of high-pressure side power supply, and the other end of the second high-pressure side electric capacity links to each other with the drain electrode of the 4th power switch pipe and the other end of high-pressure side power supply.The 3rd shunt capacitance in parallel at the 3rd power switch pipe two ends, the 4th shunt capacitance in parallel at the 4th power switch pipe two ends.
Scheme 2
Isolation type active clamping alternation parallel two-way DC-DC converter of the present utility model comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: active clamping circuir and two branch roads in parallel with the low-pressure side power supply, article one, parallel branch first power switch pipe anti-with band by the first low-pressure side winding and diode is connected and is constituted, first shunt capacitance in parallel at the first power switch pipe two ends, second parallel branch second power switch pipe anti-with band by the second low-pressure side winding and diode is connected and is constituted, second shunt capacitance in parallel at the second power switch pipe two ends; Active clamping circuir first auxiliary switch, band anti-by band and diode second auxiliary switch and clamping capacitance anti-and diode constitute, wherein the source electrode of first auxiliary switch links to each other with the drain electrode of first power switch pipe, the source electrode of second auxiliary switch links to each other with the drain electrode of second power switch pipe, the drain electrode of the drain electrode of first auxiliary switch and second auxiliary switch links to each other with an end of clamping capacitance, and the other end of clamping capacitance links to each other with the source electrode of second power switch pipe or links to each other with that end that the low-pressure side power supply links to each other with the first low-pressure side winding.
Described high-pressure side circuit comprises: the first high-pressure side winding, the second high-pressure side winding, the 3rd power switch pipe of being with anti-and diode, band anti-also the 4th power switch pipe, the first high-pressure side electric capacity and the second high-pressure side electric capacity of diode.Wherein the first high-pressure side winding and the first low-pressure side winding are all two windings in the coupling inductance, the second high-pressure side winding and the second low-pressure side winding are all two windings in another coupling inductance, serving as with reference to end all in the first low-pressure side winding and the second low-pressure side winding with same that end that extremely links to each other of low-pressure side power supply, the end of the same name that the first high-pressure side winding is corresponding with the first low-pressure side winding links to each other with the corresponding end of the same name of the second high-pressure side winding and the second low-pressure side winding, the other end of the first high-pressure side winding links to each other with the source electrode of the 4th power switch pipe and the drain electrode of the 3rd power switch pipe, the other end of the second high-pressure side winding links to each other with the end of the first high-pressure side electric capacity with the second high-pressure side electric capacity, the other end of the first high-pressure side electric capacity links to each other with the source electrode of the 3rd power switch pipe and an end of high-pressure side power supply, and the other end of the second high-pressure side electric capacity links to each other with the drain electrode of the 4th power switch pipe and the other end of high-pressure side power supply.The 3rd shunt capacitance in parallel at the 3rd power switch pipe two ends, the 4th shunt capacitance in parallel at the 4th power switch pipe two ends.
Isolation type active clamping alternation of the present utility model and two-way DC-DC converter, utilize the low-pressure side parallel-connection structure to reduce the ripple of low-pressure side electric current, utilize the no-voltage of the shunt capacitance realization power switch pipe on the power switch pipe to turn-off, utilize the leakage inductance of coupling inductance to realize that the no-voltage of power switch pipe is open-minded, utilize auxiliary switch and active clamping circuir anti-and diode and clamping capacitance composition thereof to realize the harmless transfer of leakage inductance energy, utilize the cascaded structure of the high-pressure side winding of two coupling inductances to realize the high step-up/down of converter, circuit structure is simple, all power switchs work in soft on off state, noenergy losser in the circuit, improved the efficient of converter, in the commutation course, the overshoot of switching device no-voltage.The utility model is wound on two coupling inductances on the magnetic cell by the mode of shared magnetic circuit, has reduced volume.
Description of drawings
Fig. 1 is the circuit diagram of scheme 1 isolation type active clamping alternation parallel two-way DC-DC converter;
Fig. 2 is the another kind of execution mode circuit diagram of scheme 1 lower-voltage circuit;
Fig. 3 is the circuit diagram of scheme 2 isolation type active clamping alternation parallel two-way DC-DC converters;
Fig. 4 is the another kind of execution mode circuit diagram of scheme 2 lower-voltage circuits;
Fig. 5 is the utility model two-way DC-DC converter course of work oscillogram under the operation mode of boosting;
Fig. 6 is a course of work oscillogram under the utility model two-way DC-DC converter step-down operation mode.
Embodiment
Referring to Fig. 1, isolation type active clamping alternation parallel two-way DC-DC converter of the present utility model comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: two active clamping circuirs and two and low-pressure side power supply V
LBranch road in parallel, article one parallel branch is by the first low-pressure side winding L
1aAnti-and the diode D with band
1First power switch tube S
1Series connection constitutes, in first power switch tube S
1The two ends first shunt capacitance C in parallel
S1, the second parallel branch is by the second low-pressure side winding L
2aAnti-and the diode D with band
2Second power switch tube S
2Series connection constitutes, in second power switch tube S
2The two ends second shunt capacitance C in parallel
S2In the example shown in Figure 1, the first active clamping circuir parallel connection is connected in parallel on first power switch tube S
1Source electrode and the drain electrode on, perhaps also can be connected in parallel on the first low-pressure side winding L as shown in Figure 2
1aTwo ends.It is anti-and diode D by band
C1The first auxiliary switch S
C1With the first clamping capacitance C
C1Series connection constitutes; In the example shown in Figure 1, second active clamping circuir is connected in parallel on second power switch tube S
2Source electrode and the drain electrode on, perhaps also can be connected in parallel on the second low-pressure side winding L as shown in Figure 2
2aTwo ends.It is anti-and diode D by band
C2The second auxiliary switch S
C2With the second clamping capacitance C
C2Series connection constitutes;
Described high-pressure side circuit comprises: the first high-pressure side winding L
1b, the second high-pressure side winding L
2b, the anti-and diode D of band
3The 3rd power switch tube S
3, the anti-and diode D of band
4The 4th power switch tube S
4, the first high-pressure side capacitor C
O1With the second high-pressure side capacitor C
O2The first high-pressure side winding L wherein
1bWith the first low-pressure side winding L
1aBe all two windings in the coupling inductance, the second high-pressure side winding L
2bWith the second low-pressure side winding L
2aBe all two windings in another coupling inductance, with the first low-pressure side winding L
1aWith the second low-pressure side winding L
2aIn all with low-pressure side power supply V
LSame that end that extremely links to each other is with reference to end, the first high-pressure side winding L
1bWith the first low-pressure side winding L
1aThe corresponding end of the same name and the second high-pressure side winding L
2bWith the second low-pressure side winding L
2aCorresponding end of the same name links to each other, the first high-pressure side winding L
1bThe other end and the 4th power switch tube S
4Source electrode and the 3rd power switch tube S
3Drain electrode link to each other the second high-pressure side winding L
2bThe other end and the first high-pressure side capacitor C
O1With the second high-pressure side capacitor C
O2An end link to each other the first high-pressure side capacitor C
O1The other end and the 3rd power switch tube S
3Source electrode and high-pressure side power supply V
HAn end link to each other the second high-pressure side capacitor C
O2The other end and the 4th power switch tube S
4Drain electrode and high-pressure side power supply V
HThe other end link to each other.In the 3rd power switch tube S
3Two ends the 3rd shunt capacitance C in parallel
S3, in the 4th power switch tube S
4Two ends the 4th shunt capacitance C in parallel
S4
Referring to Fig. 3, isolation type active clamping alternation parallel two-way DC-DC converter of the present utility model comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: active clamping circuir and two and low-pressure side power supply V
LBranch road in parallel, article one parallel branch is by the first low-pressure side winding L
1aAnti-and the diode D with band
1First power switch tube S
1Series connection constitutes, in first power switch tube S
1The two ends first shunt capacitance C in parallel
S1, the second parallel branch is by the second low-pressure side winding L
2aAnti-and the diode D with band
2Second power switch tube S
2Series connection constitutes, in second power switch tube S
2The two ends second shunt capacitance C in parallel
S2Active clamping circuir is anti-and diode D by band
C1The first auxiliary switch S
C1, the anti-and diode D of band
C2The second auxiliary switch S
C2With clamping capacitance C
cConstitute, wherein the first auxiliary switch S
C1The source electrode and first power switch tube S
1Drain electrode link to each other the second auxiliary switch S
C2The source electrode and second power switch tube S
2Drain electrode link to each other the first auxiliary switch S
C1The drain electrode and the second auxiliary switch S
C2Drain electrode and clamping capacitance C
cAn end link to each other, in the example shown in Figure 3, clamping capacitance C
cThe other end and second power switch tube S
2Source electrode link to each other, perhaps also can be as shown in Figure 4, clamping capacitance C
cThe other end and the first low-pressure side winding L
1aWith low-pressure side power supply V
LThat end that links to each other links to each other.
Described high-pressure side circuit comprises: the first high-pressure side winding L
1b, the second high-pressure side winding L
2b, the anti-and diode D of band
3The 3rd power switch tube S
3, the anti-and diode D of band
4The 4th power switch tube S
4, the first high-pressure side capacitor C
O1With the second high-pressure side capacitor C
O2The first high-pressure side winding L wherein
1bWith the first low-pressure side winding L
1aBe all two windings in the coupling inductance, the second high-pressure side winding L
2bWith the second low-pressure side winding L
2aBe all two windings in another coupling inductance, with the first low-pressure side winding L
1aWith the second low-pressure side winding L
2aIn all with low-pressure side power supply V
LSame that end that extremely links to each other is with reference to end, the first high-pressure side winding L
1bWith the first low-pressure side winding L
1aThe corresponding end of the same name and the second high-pressure side winding L
2bWith the second low-pressure side winding L
2aCorresponding end of the same name links to each other, the first high-pressure side winding L
1bThe other end and the 4th power switch tube S
4Source electrode and the 3rd power switch tube S
3Drain electrode link to each other the second high-pressure side winding L
2bThe other end and the first high-pressure side capacitor C
O1With the second high-pressure side capacitor C
O2An end link to each other the first high-pressure side capacitor C
O1The other end and the 3rd power switch tube S
3Source electrode and high-pressure side power supply V
HAn end link to each other the second high-pressure side capacitor C
O2The other end and the 4th power switch tube S
4Drain electrode and high-pressure side power supply V
HThe other end link to each other.In the 3rd power switch tube S
3Two ends the 3rd shunt capacitance C in parallel
S3, in the 4th power switch tube S
4Two ends the 4th shunt capacitance C in parallel
S4
During the work of the utility model two-way DC-DC converter, initial high-low pressure DC power supply is inserted converter, signals such as low-pressure side electric current, low-pressure side supply voltage, low-pressure side clamping capacitance voltage and high-pressure side supply voltage according to the sampling gained, use phase shift to add the control method of PWM, control signal by drawing second power switch pipe after the DSP routine processes is leading or lag behind the control signal of the 4th power switch pipe, thereby realizes the control of through-put power size and Orientation.According to the high-low voltage power source voltage magnitude, calculate the duty ratio of first power switch pipe, second power switch pipe, first auxiliary switch and second auxiliary switch, make the voltage matches on high-pressure side equivalence leakage inductance both sides.According to each switching tube duty ratio size and phase relation of calculating, control turning on and off of first power switch pipe, second power switch pipe, first auxiliary switch, second auxiliary switch, the 3rd power switch pipe and the 4th power switch pipe.
Wherein, the ON time of first power switch pipe and second power switch pipe equates, phase phasic difference 180 degree, the control signal complementation of first auxiliary switch and first power switch pipe, and a bit of time that common shutoff arranged is as Dead Time, the control signal complementation of second auxiliary switch and second power switch pipe, and a bit of time that common shutoff arranged is as Dead Time.The control signal complementation of the 3rd power switch pipe and the 4th power switch pipe respectively is 0.5 fixed duty cycle, and the Dead Time of common shutoff is arranged.The control signal of second power switch pipe is leading or lag behind control signal with the 4th power switch pipe, and the control signal of first power switch pipe is leading or lag behind the control signal of the 3rd power switch pipe.
Isolation type bidirectional DC-DC converter existence of the present utility model is boosted, two kinds of operation modes of step-down.Every kind of operation mode can be divided into six kinds of courses of work, and its course of work is under boost mode: the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening; First power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening; The 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening; The first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening; Second power switch tube S
2Turn-off and the second auxiliary switch S
C2Commutation course between opening; The 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening.The course of work of Fig. 1～converter shown in Figure 4 is basic identical, is the course of work that example illustrates converter with Fig. 1:
The second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening:
Before the change of current, circuit is in the second auxiliary switch S
C2Conducting, the anti-and diode D of second auxiliary switch
C2Turn-off first power switch tube S
1Conducting, the anti-and diode D of first power switch pipe
1Turn-off the 3rd power switch tube S
3Conducting, the anti-and diode D of the 3rd power switch pipe
3Turn-off the first auxiliary switch S
C1And anti-and diode D
C1Turn-off second power switch tube S
2Its anti-and diode D
2Turn-off the 4th power switch tube S
4Its anti-and diode D
4Turn-off.As the second auxiliary switch S
C2During shutoff, in the low-pressure side of converter, the shunt capacitance C of the leakage inductance of coupling inductance and switching tube
S2Beginning resonance is along with shunt capacitance C
S2The decline of voltage, the second auxiliary switch S
C2Voltage start from scratch rising, the i.e. second auxiliary switch S
C2Realized the no-voltage shutoff, as shunt capacitance C
S2On voltage linear when dropping to zero, second power switch tube S
2Anti-and diode D
2Conducting provides second power switch tube S this moment
2Open signal, just realized second power switch tube S
2No-voltage is open-minded.In this process, in the high-pressure side of converter, the 3rd power switch tube S
3Be in conducting state, energy is transferred to the first high-pressure side capacitor C from first, second coupling inductance
O1In.
First power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening:
Before the change of current, circuit is in first power switch tube S
1Conducting, the anti-and diode D of first power switch pipe
1Turn-off second power switch tube S
2Conducting, the anti-and diode D of second power switch pipe
2Turn-off the first auxiliary switch S
C1And anti-and diode D
C1Turn-off the second auxiliary switch S
C2And anti-and diode D
C2Turn-off the 3rd power switch tube S
3Conducting, the anti-and diode D of the 3rd power switch pipe
3Turn-off the 4th power switch tube S
4Its anti-and diode D
4Turn-off.When first power switch tube S
1During shutoff, in the low-pressure side of converter, because switching tube shunt capacitance C
S1Effect, first power switch tube S
1Voltage start from scratch and rise, therefore first power switch tube S so that certain slope is linear
1Realized the no-voltage shutoff.When first power switch tube S
1Voltage surpass the first clamping capacitance C
C1Voltage the time, the anti-and diode D of first auxiliary switch
C1The first clamping capacitance C is transferred in conducting, the energy in the leakage inductance of first coupling inductance
C1In, at the anti-and diode D of first auxiliary switch
C1Provide the first auxiliary switch S after the conducting
C1Open signal, and realized the first auxiliary switch S
C1No-voltage open-minded, the anti-and diode D of first auxiliary switch
C1Deactivate.In this process, in the high-pressure side of converter, the 3rd power switch tube S
3Be in and still be in conducting state, energy continues to transfer to the first high-pressure side capacitor C from first, second coupling inductance
O1In.
The 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening:
Before the change of current, circuit is in second power switch tube S
2Conducting, the anti-and diode D of second power switch pipe
2Turn-off the 3rd power switch tube S
3Conducting, the anti-and diode D of the 3rd power switch pipe
3Turn-off the first auxiliary switch S
C1Conducting, its anti-and diode D
C1Turn-off the second auxiliary switch S
C2And anti-and diode D
C2Turn-off first power switch tube S
1Its anti-and diode D
1Turn-off the 4th power switch tube S
4Its anti-and diode D
4Turn-off.The 3rd power switch tube S
3During shutoff, in the high-pressure side of converter, because switching tube shunt capacitance C
S3Effect, the 3rd power switch tube S
3Voltage start from scratch and rise, therefore the 3rd power switch tube S so that certain slope is linear
3Realized the no-voltage shutoff.When the 3rd power switch tube S
3Voltage surpass the high-pressure side capacitor C
oVoltage the time, the 4th power switch tube S
4Anti-and diode D
4Conducting, the energy of first and second coupling inductance is transferred to the high-pressure side capacitor C
O2In, in the 4th power switch tube S
4Anti-and diode D
4After the conducting, provide the 4th power switch tube S
4Open signal, thereby realized the 4th power switch tube S
4No-voltage open-minded, the 4th power switch tube S
4Anti-and diode D
4Deactivate.
The first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening:
Since the symmetry of circuit, the commutation course of converter low-pressure side and the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening is similar.
Second power switch tube S
2Turn-off and the second auxiliary switch S
C2Commutation course between opening:
Because symmetry, the commutation course of converter low-pressure side and first power switch tube S of circuit
1Turn-off and the first auxiliary switch S
C1Commutation course between opening is similar.
The 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening:
Since the symmetry of circuit, on high-tension side commutation course of converter and the 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening is similar.
Fig. 5 is the two-way DC-DC converter course of work oscillogram under the operation mode of boosting, and Ф represents phase shifting angle among Fig. 5, and D represents duty ratio, and the drive waveforms duty that the top of figure is divided into each switching tube is the phase relation schematic diagram when, the i among the figure
LbBe the current waveform of high-pressure side coupling inductance, the θ among the figure
0To θ
11Represent the time point in the switch periods, θ
0～θ
1In time the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening, θ
1～θ
3It in time first power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening, θ
3～θ
5It in time the 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening, θ
5～θ
7In time the first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening, θ
7～θ
9Second power switch tube S in time
2Turn-off and the second auxiliary switch S
C2Commutation course between opening, θ
9～θ
11It in time the 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening.
Fig. 6 is a course of work oscillogram under the two-way DC-DC converter step-down operation mode.Its course of work is following six processes under decompression mode: the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening; First power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening; The 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening; The first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening; Second power switch tube S
2Turn-off and the second auxiliary switch S
C2Commutation course between opening; The 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening.
The second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening:
Before the change of current, circuit is in the second auxiliary switch S
C2Conducting, the anti-and diode D of second auxiliary switch
C2Turn-off first power switch tube S
1Conducting, the anti-and diode D of first power switch pipe
1Turn-off the 4th power switch tube S
4Conducting, the anti-and diode D of the 4th power switch pipe
4Turn-off the first auxiliary switch S
C1And anti-and diode D
C1Turn-off second power switch tube S
2Its anti-and diode D
2Turn-off the 3rd power switch tube S
3Its anti-and diode D
3Turn-off.As the second auxiliary switch S
C2During shutoff, in the low-pressure side of converter, the shunt capacitance C of the leakage inductance of coupling inductance and switching tube
S2Beginning resonance is along with shunt capacitance C
S2The decline of voltage, the second auxiliary switch S
C2Voltage start from scratch rising, the i.e. second auxiliary switch S
C2Realized the no-voltage shutoff, as shunt capacitance C
S2On voltage linear when dropping to zero, second power switch tube S
2Anti-and diode D
2Conducting provides second power switch tube S this moment
2Open signal, just realized second power switch tube S
2No-voltage is open-minded.In this process, in the high-pressure side of converter, the 4th power switch tube S
4Be in conducting state, energy is from the high-pressure side capacitor C
O2Transfer to low-pressure side through first, second coupling inductance.
First power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening:
Before the change of current, circuit is in first power switch tube S
1Conducting, the anti-and diode D of first power switch pipe
1Turn-off second power switch tube S
2Conducting, the anti-and diode D of second power switch pipe
2Turn-off the first auxiliary switch S
C1And anti-and diode D
C1Turn-off the second auxiliary switch S
C2And anti-and diode D
C2Turn-off the 4th power switch tube S
4Conducting, the anti-and diode D of the 4th power switch pipe
4Turn-off the 3rd power switch tube S
3Its anti-and diode D
3Turn-off.When first power switch tube S
1During shutoff, in the low-pressure side of converter, because switching tube shunt capacitance C
S1Effect, first power switch tube S
1Voltage start from scratch and rise, therefore first power switch tube S so that certain slope is linear
1Realized the no-voltage shutoff.When first power switch tube S
1Voltage surpass the first clamping capacitance C
C1Voltage the time, the anti-and diode D of first auxiliary switch
C1The first clamping capacitance C is transferred in conducting, the energy in the leakage inductance of first coupling inductance
C1In, at the anti-and diode D of first auxiliary switch
C1Provide the first auxiliary switch S after the conducting
C1Open signal, and realized the first auxiliary switch S
C1No-voltage open-minded, the anti-and diode D of first auxiliary switch
C1Deactivate.In this process, in the high-pressure side of converter, the 4th power switch tube S
4Be in and still be in conducting state, energy continues from the high-pressure side capacitor C
O2Transfer to low-pressure side through first, second coupling inductance.
The 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening:
Before the change of current, circuit is in second power switch tube S
2Conducting, the anti-and diode D of second power switch pipe
2Turn-off the 4th power switch tube S
4Conducting, the anti-and diode D of the 4th power switch pipe
4Turn-off the first auxiliary switch S
C1Conducting, its anti-and diode D
C1Turn-off the second auxiliary switch S
C2And anti-and diode D
C2Turn-off first power switch tube S
1Its anti-and diode D
1Turn-off the 3rd power switch tube S
3Its anti-and diode D
3Turn-off.The 4th power switch tube S
4During shutoff, in the high-pressure side of converter, because switching tube shunt capacitance C
S4Effect, the 4th power switch tube S
4Voltage start from scratch and rise, therefore the 4th power switch tube S so that certain slope is linear
4Realized the no-voltage shutoff.When the 3rd power switch tube S
3Voltage linear when dropping to zero, the 3rd power switch tube S
3Anti-and diode D
3Conducting provides the 3rd power switch tube S this moment
3Open signal, thereby realized the 3rd power switch tube S
3No-voltage open-minded, the 3rd power switch tube S
3Anti-and diode D
3Deactivate the first high-pressure side capacitor C
O1Energy begin to shift in first and second coupling inductance.
The first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening:
Since the symmetry of circuit, the commutation course of converter low-pressure side and the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening is similar.
Second power switch tube S
2Turn-off and the second auxiliary switch S
C2Commutation course between opening:
Because symmetry, the commutation course of converter low-pressure side and first power switch tube S of circuit
1Turn-off and the first auxiliary switch S
C1Commutation course between opening is similar.
The 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening:
Since the symmetry of circuit, on high-tension side commutation course of converter and the 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening is similar.
The drive waveforms duty that the top of Fig. 6 is divided into each switching tube is the phase relation schematic diagram when, and Ф represents phase shifting angle, and D represents duty ratio, the i among the figure
LbBe the current waveform of high-pressure side coupling inductance, the θ among the figure
0To θ
11Represent the time point in the switch periods, θ
0～θ
1In time the second auxiliary switch S
C2Turn-off and second power switch tube S
2Commutation course between opening, θ
1～θ
3It in time first power switch tube S
1Turn-off and the first auxiliary switch S
C1Commutation course between opening, θ
3～θ
5It in time the 4th power switch tube S
4Turn-off and the 3rd power switch tube S
3Commutation course between opening, θ
5～θ
7In time the first auxiliary switch S
C1Turn-off and first power switch tube S
1Commutation course between opening, θ
7～θ
9Second power switch tube S in time
2Turn-off and the second auxiliary switch S
C2Commutation course between opening, θ
9～θ
11It in time the 3rd power switch tube S
3Turn-off and the 4th power switch tube S
4Commutation course between opening.
Claims (2)
1. an isolation type active clamping alternation parallel two-way DC-DC converter is characterized in that, comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: two active clamping circuirs and two and low-pressure side power supply (V
L) branch road in parallel, article one parallel branch is by the first low-pressure side winding (L
1a) the anti-and diode (D with band
1) the first power switch pipe (S
1) the series connection formation, at the first power switch pipe (S
1) the two ends first shunt capacitance (C in parallel
S1), the second parallel branch is by the second low-pressure side winding (L
2a) the anti-and diode (D with band
2) the second power switch pipe (S
2) the series connection formation, at the second power switch pipe (S
2) the two ends second shunt capacitance (C in parallel
S2); First active clamping circuir is connected in parallel on the first low-pressure side winding (L
1a) two ends or be connected in parallel on the first power switch pipe (S
1) source electrode and drain electrode on, it is anti-and diode (D by band
C1) the first auxiliary switch (S
C1) and the first clamping capacitance (C
C1) the series connection formation; Second active clamping circuir is connected in parallel on the second low-pressure side winding (L
2a) two ends or be connected in parallel on the second power switch pipe (S
2) source electrode and drain electrode on, it is anti-and diode (D by band
C2) the second auxiliary switch (S
C2) and the second clamping capacitance (C
C2) the series connection formation;
Described high-pressure side circuit comprises: the first high-pressure side winding (L
1b), the second high-pressure side winding (L
2b), the anti-and diode (D of band
3) the 3rd power switch pipe (S
3), the anti-and diode (D of band
4) the 4th power switch pipe (S
4), the first high-pressure side electric capacity (C
O1) and the second high-pressure side electric capacity (C
O2), the first high-pressure side winding (L wherein
1b) and the first low-pressure side winding (L
1a) be all two windings in the coupling inductance, the second high-pressure side winding (L
2b) and the second low-pressure side winding (L
2a) be all two windings in another coupling inductance, with the first low-pressure side winding (L
1a) and the second low-pressure side winding (L
2a) in all with low-pressure side power supply (V
L) same that end that extremely links to each other be with reference to holding the first high-pressure side winding (L
1b) and the first low-pressure side winding (L
1a) the corresponding end of the same name and the second high-pressure side winding (L
2b) and the second low-pressure side winding (L
2a) corresponding end of the same name links to each other the first high-pressure side winding (L
1b) the other end and the 4th power switch pipe (S
4) source electrode and the 3rd power switch pipe (S
3) drain electrode link to each other the second high-pressure side winding (L
2b) the other end and the first high-pressure side electric capacity (C
O1) and the second high-pressure side electric capacity (C
O2) an end link to each other the first high-pressure side electric capacity (C
O1) the other end and the 3rd power switch pipe (S
3) source electrode and high-pressure side power supply (V
H) an end link to each other the second high-pressure side electric capacity (C
O2) the other end and the 4th power switch pipe (S
4) drain electrode and high-pressure side power supply (V
H) the other end link to each other, at the 3rd power switch pipe (S
3) two ends the 3rd shunt capacitance (C in parallel
S3), at the 4th power switch pipe (S
4) two ends the 4th shunt capacitance (C in parallel
S4).
2. an isolation type active clamping alternation parallel two-way DC-DC converter is characterized in that, comprises lower-voltage circuit and high-pressure side circuit;
Described lower-voltage circuit comprises: active clamping circuir and two and low-pressure side power supply (V
L) branch road in parallel, article one parallel branch is by the first low-pressure side winding (L
1a) the anti-and diode (D with band
1) the first power switch pipe (S
1) the series connection formation, at the first power switch pipe (S
1) the two ends first shunt capacitance (C in parallel
S1), the second parallel branch is by the second low-pressure side winding (L
2a) the anti-and diode (D with band
2) the second power switch pipe (S
2) the series connection formation, at the second power switch pipe (S
2) the two ends second shunt capacitance (C in parallel
S2); Active clamping circuir is anti-and diode (D by band
C1) the first auxiliary switch (S
C1), the anti-and diode (D of band
C2) the second auxiliary switch (S
C2) and clamping capacitance (C
c) formation, the wherein first auxiliary switch (S
C1) the source electrode and the first power switch pipe (S
1) drain electrode link to each other the second auxiliary switch (S
C2) the source electrode and the second power switch pipe (S
2) drain electrode link to each other the first auxiliary switch (S
C1) the drain electrode and the second auxiliary switch (S
C2) drain electrode and clamping capacitance (C
c) an end link to each other clamping capacitance (C
c) the other end and the second power switch pipe (S
2) source electrode link to each other or with the first low-pressure side winding (L
1a) with low-pressure side power supply (V
L) that end of linking to each other links to each other;
Described high-pressure side circuit comprises: the first high-pressure side winding (L
1b), the second high-pressure side winding (L
2b), the anti-and diode (D of band
3) the 3rd power switch pipe (S
3), the anti-and diode (D of band
4) the 4th power switch pipe (S
4), the first high-pressure side electric capacity (C
O1) and the second high-pressure side electric capacity (C
O2), the first high-pressure side winding (L wherein
1b) and the first low-pressure side winding (L
1a) be all two windings in the coupling inductance, the second high-pressure side winding (L
2b) and the second low-pressure side winding (L
2a) be all two windings in another coupling inductance, with the first low-pressure side winding (L
1a) and the second low-pressure side winding (L
2a) in all with low-pressure side power supply (V
L) same that end that extremely links to each other be with reference to holding the first high-pressure side winding (L
1b) and the first low-pressure side winding (L
1a) the corresponding end of the same name and the second high-pressure side winding (L
2b) and the second low-pressure side winding (L
2a) corresponding end of the same name links to each other the first high-pressure side winding (L
1b) the other end and the 4th power switch pipe (S
4) source electrode and the 3rd power switch pipe (S
3) drain electrode link to each other the second high-pressure side winding (L
2b) the other end and the first high-pressure side electric capacity (C
O1) and the second high-pressure side electric capacity (C
O2) an end link to each other the first high-pressure side electric capacity (C
O1) the other end and the 3rd power switch pipe (S
3) source electrode and high-pressure side power supply (V
H) an end link to each other the second high-pressure side electric capacity (C
O2) the other end and the 4th power switch pipe (S
4) drain electrode and high-pressure side power supply (V
H) the other end link to each other, at the 3rd power switch pipe (S
3) two ends the 3rd shunt capacitance (C in parallel
S3), at the 4th power switch pipe (S
4) two ends the 4th shunt capacitance (C in parallel
S4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205338539U CN201821266U (en) | 2010-09-17 | 2010-09-17 | Isolated-type active-clamp interleaved parallel two-way DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205338539U CN201821266U (en) | 2010-09-17 | 2010-09-17 | Isolated-type active-clamp interleaved parallel two-way DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201821266U true CN201821266U (en) | 2011-05-04 |
Family
ID=43919208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205338539U Expired - Lifetime CN201821266U (en) | 2010-09-17 | 2010-09-17 | Isolated-type active-clamp interleaved parallel two-way DC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201821266U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976953A (en) * | 2010-09-17 | 2011-02-16 | 浙江大学 | Isolated bidirectional DC-DC converter realized by coupling inductor |
| US11804782B2 (en) | 2022-01-28 | 2023-10-31 | Analog Devices, Inc. | Active-clamp current-fed push-pull converter for bidirectional power transfer |
-
2010
- 2010-09-17 CN CN2010205338539U patent/CN201821266U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976953A (en) * | 2010-09-17 | 2011-02-16 | 浙江大学 | Isolated bidirectional DC-DC converter realized by coupling inductor |
| CN101976953B (en) * | 2010-09-17 | 2012-08-15 | 浙江大学 | Isolated bidirectional DC-DC converter realized by coupling inductor |
| US11804782B2 (en) | 2022-01-28 | 2023-10-31 | Analog Devices, Inc. | Active-clamp current-fed push-pull converter for bidirectional power transfer |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110504 Effective date of abandoning: 20120815 |