CN203911753U - Zero-voltage switch-off interleaved parallel DC/DC converter - Google Patents

Zero-voltage switch-off interleaved parallel DC/DC converter Download PDF

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Publication number
CN203911753U
CN203911753U CN201420365448.9U CN201420365448U CN203911753U CN 203911753 U CN203911753 U CN 203911753U CN 201420365448 U CN201420365448 U CN 201420365448U CN 203911753 U CN203911753 U CN 203911753U
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China
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power switch
voltage
switch tube
diode
interface
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Expired - Fee Related
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CN201420365448.9U
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Chinese (zh)
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邾玢鑫
黄悦华
程杉
谭超
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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Abstract

The utility model relates to a zero-voltage switch-off interleaved parallel DC/DC converter. The zero-voltage switch-off interleaved parallel DC/DC converter comprises a first inductor L1, a second inductor L2, a first power switch tube S1, a second power switch tube S2, an output diode D0 and a filtering capacitor C0; one end of the first inductor L1 and one end of the second inductor L2 are both connected with the positive pole of a power source Uin; the other end of the first inductor L1 is connected with the drain of the first power switch tube S1; the other end of the second inductor L2 is connected with the drain of the second power switch tube S2; and the source of the first power switch tube S1 and the source of the second power switch tube S2 are connected with the negative pole of the power source Uin. According to the zero-voltage switch-off interleaved parallel DC/DC converter provided by the utility model, the zero-voltage switch-off of the switch tubes can be realized, and therefore, switching loss of the switch tubes can be decreased effectively, and work efficiency is high.

Description

No-voltage is turn-offed staggered-parallel-type DC/DC converter
Technical field
A kind of DC/DC converter of the utility model, particularly a kind of no-voltage turn-off staggered-parallel-type DC/DC converter.
Background technology
In prior art, basic booster type (Boost) interleaved parallel converter comprises: two inductance, two power switch pipe pipes, two output diodes.Wherein, together with the input of the input of first inductance and second inductance, connect the positive pole of input power, the anode of first output diode of output termination, connect the positive pole of converter output terminal together with the negative electrode of the negative electrode of first diode and second diode; Between the first inductance and the anode of first diode, connect the drain electrode of the first power switch pipe, the first power switch pipe source electrode connects the negative pole of converter; The anode of second output diode of output termination of second inductance connects the drain electrode of the second power switch pipe between the second inductance and the anode of second diode, and the second power switch pipe source electrode connects the negative pole of converter.This basic boost interleaved parallel converter output voltage gain is less, and the voltage stress of power switch pipe pipe and diode is output voltage, so loss is also larger.In addition switching tube and diode are all operated under hard switching pattern, and the reverse recovery loss of switching loss and diode is larger.In recent years, in succession occurred that some have the circuit topology of high gain boost and soft switching capability simultaneously, mainly contain the mode by means of coupling inductance and active-clamp, this mode has increased former transducer gain on the one hand, also realized on the other hand soft switch, but owing to need to considering the problem of heterogeneous current-sharing, circuit control program is more complicated, the more cost that also causes of device is higher.
Summary of the invention
For the deficiencies in the prior art, for solving existing converter, in promotion, have a meeting, an audience, etc. well under one's control while closing middle application, energy conversion efficiency reduces, switching device too much, switching tube and the problem such as diode electrically compression is large.The utility model provides a kind of no-voltage to turn-off staggered-parallel-type DC/DC converter.Switching tube is all realized no-voltage and is turn-offed, and can effectively reduce the switching loss of switching tube, and operating efficiency is high.
The technical scheme that the utility model is taked is: no-voltage is turn-offed staggered-parallel-type DC/DC converter, comprises the first inductance L 1, the second inductance L 2, the first power switch tube S 1, the second power switch tube S 2, output diode D 0, filter capacitor C 0,
Described the first inductance L 1one end, the second inductance L 2one end all connects power supply U inpositive pole, the first inductance L 1the other end connects the first power switch tube S 1drain electrode, the second inductance L 2the other end connects the second power switch tube S 2drain electrode, the first power switch tube S 1source electrode, the second power switch tube S 2source electrode connect power supply U innegative pole.Described the first inductance L 1the other end, the second inductance L 2the other end connects respectively a plurality of voltage doubling units gain circuitry in series, and described gain circuitry connects auxiliary unit, and auxiliary unit connects output diode D 0anode, filter capacitor C 0one end, output diode D 0negative electrode connect filter capacitor C 0one end, filter capacitor C 0the other end connects power supply U innegative pole.
Described gain circuitry comprises n voltage doubling unit, n-1 voltage doubling unit, n-2 voltage doubling unit, the 1st voltage doubling unit, first inductance L 1 other end connects the first interface of n voltage doubling unit, second inductance L 2 other ends connect the second interface of n voltage doubling unit, the 3rd interface of n voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-1 voltage doubling unit, the 3rd interface of n-1 voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-2 voltage doubling unit, the like until the 3rd interface of the 2nd voltage doubling unit and the 4th interface distribute, connect first interface and second interface of the 1st voltage doubling unit.
Described auxiliary unit comprises auxiliary capacitor C a1, the first diode D a1, the second diode D a2, auxiliary capacitor C a1one end connects gain circuitry, auxiliary capacitor C a1the other end connects the first diode D a1negative electrode, the second diode D a2anode, the first diode D a1anodic bonding gain circuitry, output diode D 0anode, the second diode D a2negative electrode connect output diode D 0negative electrode, filter capacitor C 0one end.By auxiliary unit, can realize the no-voltage of all switching tubes turn-offs.
Described the first power switch tube S 1source electrode, the second power switch tube S 2grid connect respectively each self-controller, the first power switch tube S 1, the second power switch tube S 2driving phase place between differ 180 °.
Each voltage doubling unit comprises diode D, capacitor C, and capacitor C one end connects diode cathode, and each voltage doubling unit comprises four interfaces.
A kind of no-voltage of the utility model is turn-offed staggered-parallel-type DC/DC converter, and beneficial effect is as follows:
1), can utilize voltage doubling unit to realize the high-gain output of converter, can utilize voltage doubling unit quantity to regulate the input and output ratio of gains; Voltage doubling unit can improve the basis gain of 1 times, that is to say the circuit that contains n voltage doubling unit, and its ratio of gains is exactly (n+1) times of basic booster converter.
2), compare with existing scheme, this utility model circuit is simple, does not exist coupling inductance, EMI little, does not have transformer, and the voltage stress of switching device is lower.
3), all switching tubes have all realized no-voltage shutoff, can effectively reduce the switching loss of switching tube, for adopting, the application scenario of IGBT is especially effective, converter operating efficiency is higher.
Accompanying drawing explanation
Fig. 1 is that the no-voltage that comprises a voltage doubling unit is turn-offed staggered-parallel-type DC/DC converter circuit figure.
Fig. 2 is that the no-voltage that comprises n voltage doubling unit is turn-offed staggered-parallel-type DC/DC converter circuit figure.
Fig. 3 is voltage doubling unit circuit diagram.
Embodiment
As shown in Fig. 1 ~ Fig. 3, no-voltage is turn-offed staggered-parallel-type DC/DC converter, comprises the first inductance L 1, the second inductance L 2, the first power switch tube S 1, the second power switch tube S 2, output diode D 0, filter capacitor C 0, described the first inductance L 1one end, the second inductance L 2one end all connects power supply U inpositive pole, the first inductance L 1the other end connects the first power switch tube S 1drain electrode, the second inductance L 2the other end connects the second power switch tube S 2drain electrode, the first power switch tube S 1source electrode, the second power switch tube S 2source electrode connect power supply U innegative pole.Described the first power switch tube S 1source electrode, the second power switch tube S 2grid connect respectively each self-controller, the first power switch tube S 1, the second power switch tube S 2driving phase place between differ 180 °.
Described the first inductance L 1the other end, the second inductance L 2the other end connects respectively a plurality of voltage doubling units gain circuitry in series, and described gain circuitry connects auxiliary unit, and auxiliary unit connects output diode D 0anode, filter capacitor C 0one end, output diode D 0negative electrode connect filter capacitor C 0one end, filter capacitor C 0the other end connects power supply U innegative pole.Described gain circuitry comprises n voltage doubling unit, n-1 voltage doubling unit, n-2 voltage doubling unit, the 1st voltage doubling unit, first inductance L 1 other end connects the first interface of n voltage doubling unit, second inductance L 2 other ends connect the second interface of n voltage doubling unit, the 3rd interface of n voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-1 voltage doubling unit, the 3rd interface of n-1 voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-2 voltage doubling unit, the like until the 3rd interface of the 2nd voltage doubling unit and the 4th interface distribute, connect first interface and second interface of the 1st voltage doubling unit.N is natural number, and span is .Described auxiliary unit comprises auxiliary capacitor C a1, the first diode D a1, the second diode D a2, auxiliary capacitor C a1one end connects gain circuitry, auxiliary capacitor C a1the other end connects the first diode D a1negative electrode, the second diode D a2anode, the first diode D a1anodic bonding gain circuitry, output diode D 0anode, the second diode D a2negative electrode connect output diode D 0negative electrode, filter capacitor C 0one end.
Described each voltage doubling unit comprises diode D, capacitor C, and capacitor C one end connects diode cathode, and each voltage doubling unit comprises four interfaces, as shown in Figure 3, interface 1., interface 2., interface 3., interface 4..
According to the difference of converter switches switching state, can be divided into four kinds of courses of work, respectively: the first power switch tube S 1open to the process of shutoff, the first power switch tube S 1turn-off to the process of opening; The second power switch tube S 2open to the process of shutoff, the second power switch tube S 2turn-off to the process of opening.Specific as follows:
1), the first power switch tube S 1open to the process of shutoff: in the first power switch tube S 1before shutoff, the first power switch tube S 1with the second power switch tube S 2all in conducting state, output diode D 0, diode D 1, the first diode D a1, the second diode D a2all in off state, auxiliary capacitor C a1terminal voltage is u o/ 2, capacitor C on voltage doubling unit 1terminal voltage is u o/ 2.When the first power switch tube S 1during shutoff, the first inductance L 1by capacitor C on voltage doubling unit 1, the first diode D a1and second power switch tube S 2to auxiliary capacitor C a1charging, the first power switch tube S 1the terminal voltage rate of climb is at auxiliary capacitor C a1effect under be limited, its rate of climb and auxiliary capacitor C a1the terminal voltage rate of climb is consistent, therefore the first power switch tube S 1realized no-voltage shutoff, this process lasts till auxiliary capacitor C a1terminal voltage rises to output voltage u ofinish.Assist afterwards the first diode D a1turn-off output diode D 0conducting, the first inductance L 1by capacitor C on voltage doubling unit 1, output diode D 0to filter capacitor C 0and load supplying.
2), the first power switch tube S 1turn-off to the process of opening: in the first power switch tube S 1before conducting, the second power switch tube S 2in conducting state, output diode D 0in conducting state, diode D 1, the first diode D a1, the second diode D a2all in off state, auxiliary capacitor C a1terminal voltage is u o, capacitor C on voltage doubling unit 1terminal voltage is u o/ 2.When the first power switch tube S 1during conducting, output diode D 0turn-off capacitor C on voltage doubling unit 1stop electric discharge, input power is by the first power switch tube S 1to the first inductance L 1charging.
3), the second power switch tube S 2open to the process of shutoff: in the second power switch tube S 2before shutoff, the first power switch tube S 1with the second power switch tube S 2all in conducting state, output diode D 0, diode D 1, the first diode D a1, the second diode D a2all in off state, auxiliary capacitor C a1terminal voltage is u o, capacitor C on voltage doubling unit 1terminal voltage is u o/ 2.When the second power switch tube S 2during shutoff, inductance L 2and auxiliary capacitor C a1by diode D a2to output filter capacitor C 0and load supplying, the second power switch tube S 2the terminal voltage rate of climb is at auxiliary capacitor C a1effect under be limited, its rate of climb and capacitor C a1terminal voltage decrease speed is consistent, therefore the second power switch tube S 2realized equally no-voltage shutoff, this process lasts till auxiliary capacitor C a1terminal voltage drops to u o/ 2 finish.Booster diode D afterwards a2turn-off diode D 1conducting, the second inductance L 2by the first power switch tube S 1to the capacitor C on voltage doubling unit 1charging.
4), the second power switch tube S 2turn-off to the process of opening: in the second power switch tube S 2before conducting, the first power switch tube S 1in conducting state, diode D 1in conducting state, diode D 0, D a1, D a2all in off state, auxiliary capacitor C a1terminal voltage is u o/ 2, capacitor C on voltage doubling unit 1terminal voltage is u o/ 2.When the second power switch tube S 2during conducting, diode D 1turn-off capacitor C on voltage doubling unit 1stop charging, input power is by the second power switch tube S 2to the second inductance L 2charging.
The first power switch tube S 1, the second power switch tube S 2according to the difference of required DC bus-bar voltage in system, and select the switching device of different voltage stresss.It should be noted that the first power switch tube S 1, the second power switch tube S 2voltage stress all only have 1/2nd of high voltage dc bus.The first power switch tube S 1, the second power switch tube S 2open and close 2 times of high gain boost circuit under control of the controller, above-mentioned, by controller, control the first power switch tube S 1, the second power switch tube S 2the every phase of duty ratio between 180 ° of phase phasic differences.Its each phase duty ratio size determines according to input/output relation.
A kind of no-voltage of the utility model is turn-offed staggered-parallel-type DC/DC converter, have the ratio of gains of 2 times, and all switching tubes has all been realized no-voltage shutoff than basic crisscross parallel Boost booster converter.This converter input connects power voltage supply module, as: photovoltaic cell, fuel cell etc., output voltage is controlled high voltage direct current.In sum, this circuit topological structure is simple, and boost capability is strong, and switching loss is low, is applicable to being applied to the poor larger occasion of some input and output voltages.

Claims (6)

1. no-voltage is turn-offed staggered-parallel-type DC/DC converter, comprises the first inductance L 1, the second inductance L 2, the first power switch tube S 1, the second power switch tube S 2, output diode D 0, filter capacitor C 0, it is characterized in that,
Described the first inductance L 1one end, the second inductance L 2one end all connects power supply U inpositive pole, the first inductance L 1the other end connects the first power switch tube S 1drain electrode, the second inductance L 2the other end connects the second power switch tube S 2drain electrode, the first power switch tube S 1source electrode, the second power switch tube S 2source electrode connect power supply U innegative pole;
Described the first inductance L 1the other end, the second inductance L 2the other end connects respectively a plurality of voltage doubling units gain circuitry in series, and described gain circuitry connects auxiliary unit, and auxiliary unit connects output diode D 0anode, filter capacitor C 0one end, output diode D 0negative electrode connect filter capacitor C 0one end, filter capacitor C 0the other end connects power supply U innegative pole.
2. no-voltage is turn-offed staggered-parallel-type DC/DC converter according to claim 1, it is characterized in that, described gain circuitry comprises n voltage doubling unit, n-1 voltage doubling unit, n-2 voltage doubling unit, the 1st voltage doubling unit, first inductance L 1 other end connects the first interface of n voltage doubling unit, second inductance L 2 other ends connect the second interface of n voltage doubling unit, the 3rd interface of n voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-1 voltage doubling unit, the 3rd interface of n-1 voltage doubling unit and the 4th interface distribute and connect first interface and second interface of n-2 voltage doubling unit, the like until the 3rd interface of the 2nd voltage doubling unit and the 4th interface distribute, connect first interface and second interface of the 1st voltage doubling unit.
3. no-voltage is turn-offed staggered-parallel-type DC/DC converter according to claim 1, it is characterized in that, described auxiliary unit comprises auxiliary capacitor C a1, the first diode D a1, the second diode D a2, auxiliary capacitor C a1one end connects gain circuitry, auxiliary capacitor C a1the other end connects the first diode D a1negative electrode, the second diode D a2anode, the first diode D a1anodic bonding gain circuitry, output diode D 0anode, the second diode D a2negative electrode connect output diode D 0negative electrode, filter capacitor C 0one end.
4. no-voltage is turn-offed staggered-parallel-type DC/DC converter according to claim 1, it is characterized in that described the first power switch tube S 1source electrode, the second power switch tube S 2grid connect respectively each self-controller, the first power switch tube S 1, the second power switch tube S 2driving phase place between differ 180 °.
5. no-voltage is turn-offed staggered-parallel-type DC/DC converter according to claim 2, it is characterized in that, each voltage doubling unit comprises diode D, capacitor C, and capacitor C one end connects diode cathode, and each voltage doubling unit comprises four interfaces.
6. no-voltage is turn-offed staggered-parallel-type DC/DC converter according to claim 1, it is characterized in that described power supply U infor photovoltaic cell or fuel cell.
CN201420365448.9U 2014-07-02 2014-07-02 Zero-voltage switch-off interleaved parallel DC/DC converter Expired - Fee Related CN203911753U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106655774A (en) * 2016-12-29 2017-05-10 三峡大学 Multi-input high-gain DC/DC converter
CN106877656A (en) * 2017-03-22 2017-06-20 华南理工大学 A kind of multi input high-gain Z source converters based on switching capacity unit
CN108599593A (en) * 2018-06-06 2018-09-28 三峡大学 One kind is from the high boost rectifier of current-sharing module large capacity
CN109921638A (en) * 2019-03-11 2019-06-21 福州大学 A kind of biswitch high step-up ratio DC converter
CN111478585A (en) * 2019-01-23 2020-07-31 模拟设备国际无限公司 Multiphase switched capacitor inductor boost converter technology

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106655774A (en) * 2016-12-29 2017-05-10 三峡大学 Multi-input high-gain DC/DC converter
CN106655774B (en) * 2016-12-29 2020-10-23 三峡大学 Multi-input high-gain DC/DC converter
CN106877656A (en) * 2017-03-22 2017-06-20 华南理工大学 A kind of multi input high-gain Z source converters based on switching capacity unit
CN108599593A (en) * 2018-06-06 2018-09-28 三峡大学 One kind is from the high boost rectifier of current-sharing module large capacity
CN108599593B (en) * 2018-06-06 2023-12-19 三峡大学 Self-current-sharing modularized high-capacity high-boost rectifier
CN111478585A (en) * 2019-01-23 2020-07-31 模拟设备国际无限公司 Multiphase switched capacitor inductor boost converter technology
CN109921638A (en) * 2019-03-11 2019-06-21 福州大学 A kind of biswitch high step-up ratio DC converter

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Granted publication date: 20141029

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