CN102969925A - Additional-voltage-free zero voltage switch energy-storing semi-bridge type inverter and modulation method - Google Patents
Additional-voltage-free zero voltage switch energy-storing semi-bridge type inverter and modulation method Download PDFInfo
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- CN102969925A CN102969925A CN2012104293801A CN201210429380A CN102969925A CN 102969925 A CN102969925 A CN 102969925A CN 2012104293801 A CN2012104293801 A CN 2012104293801A CN 201210429380 A CN201210429380 A CN 201210429380A CN 102969925 A CN102969925 A CN 102969925A
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Abstract
The invention provides an additional-voltage-free zero voltage switch energy-storing semi-bridge type inverter and a modulation method. The inverter comprises a direct current side storage battery, a direct current side voltage division capacitor, an alternating current side filtering inductor and a single-phase bridge arm formed by two full control main switches with antiparallel diodes. An auxiliary switch of the antiparallel diodes is connected between direct current buses of the voltage division capacitor and the single-phase bridge arm. Capacitors are connected at two ends of the main switches and the auxiliary switch, and a resonant branch formed by connecting a resonant inductor and a clamping capacitor is connected at two ends of the auxiliary switch in bridge mode. The inverter runs independently with load or in grid-connection mode. The main switches adopt a sine wave pulse width modulation method, and modulation signals of the auxiliary switch are synchronous with modulation signals of the main switches. In each on-off period, the auxiliary switch can achieve zero voltage opening of the main switches by simply acting once, reverse current restoring of the antiparallel diodes of the main switches is restrained, and the switch voltage stress is equal to the direct current side voltage of the inverter. The inverter is small in switch consumption, high in circuit efficiency and favorable for improving working efficiency and further improves power density.
Description
Technical field
The present invention relates to half-bridge inverter, particularly, relate to circuit topology and modulator approach without auxiliary voltage stress zero voltage switch battery energy storage semi-bridge type inverter.
Background technology
Having simultaneously the operation of generating electricity by way of merging two or more grid systems and the battery energy storage single phase half bridge inverter of bringing onto load independent operation function, its circuit as shown in Figure 1, it comprises the full control main switch S that anti-paralleled diode is arranged by two
1～S
2The single-phase brachium pontis that consists of is connected on the output inductor L between brachium pontis mid point and load or the AC network.This inverter can be realized independent invert function, also can realize the operation of generating electricity by way of merging two or more grid systems, but circuit working is at the hard switching state, exist the reverse-recovery problems of diode, the devices switch loss is large, has limited the raising of operating frequency, has reduced circuit efficiency and has had larger electromagnetic interference.
Through retrieval, publication number is the Chinese patent application of 101667793A, this invention provides a kind of combining inverter, comprise DC power supply, the memory module that is connected with DC power supply, the inversion module that is connected with memory module, and the output module that is connected with electrical network with inversion module respectively, and the continuous current circuit that is connected with output module with inversion module respectively.In this invention, on the basis of the full-bridge grid-connected inverter of traditional single phase, cooperate simultaneously corresponding modulation system by introducing continuous current circuit, thereby efficiently solve the full-bridge grid-connected inverter of traditional single phase existing problem when adopting the bipolarity modulation and adopting the unipolarity modulation, thereby improved conversion efficiency and the Electro Magnetic Compatibility of inverter.
Publication number is the Chinese patent application of 102163934A, and this invention relates to a kind of combining inverter, and it comprises: four inverter transistors, two afterflow transistors, two diodes and two filter inductances; During work, microcontroller makes half power frequency period of the first afterflow transistor turns, make simultaneously the cut-off of the one or four inverter transistor and the second afterflow transistor, and make second, third inverter transistor under the synchronous triggering of described high frequency trigger signal, make high frequency to switch synchronously, so that the positive half cycle of the outboard end output AC power source of the one the second filter inductances; Then described microcontroller makes half power frequency period of the second afterflow transistor turns, make simultaneously the cut-off of second, third inverter transistor and the first afterflow transistor, the first, the 4th inverter transistor is made high frequency and is switched synchronously under the synchronous triggering of described high frequency trigger signal, so that the negative half period of the outboard end output AC power source of first, second filter inductance, so repeatedly.
Be that the Chinese patent application of 101667793A is compared with publication number, at first: the topology that the present invention proposes is a kind of Zero-voltage switch half-bridge inverter; Secondly, the control strategy main purpose that proposes among the 101667793A is to reduce the electromagnetic compatibility problem of the lower single-phase grid-connected inverter of unipolarity modulation, and the present invention is by increasing an auxiliary tube, the no-voltage that realizes all switches is open-minded, the establishment diode reverse recovery, both inverter efficiency can be improved, also Electro Magnetic Compatibility can be improved.At last, the semi-bridge type inverter that the present invention proposes can not only be operated in and net state, also can be operated in band AC load independence inverter mode.
Summary of the invention
For defective of the prior art, the purpose of this invention is to provide a kind of reverse recovery current that can twin zener dioder, reduce switching loss, improve circuit efficiency, reduce electromagnetic interference and realize that switch tube zero voltage opens without auxiliary voltage stress zero voltage switch battery energy storage semi-bridge type inverter and modulator approach.
According to an aspect of the present invention, provide a kind of and comprise the inverter direct-flow side storage battery without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter, DC side dividing potential drop capacitor C
1, C
2, the single-phase brachium pontis by two full control main switches that anti-paralleled diode arranged consist of is connected on the output inductor L between brachium pontis mid point and output loading or the AC network, wherein: two main switch S of single-phase brachium pontis
1, S
2An electric capacity in parallel is the first capacitor C respectively
R1, the second capacitor C
R2, in inverter dc partial voltage capacitor C
1, C
2And have access to the auxiliary switch S of anti-paralleled diode between the dc bus of single-phase brachium pontis
3, auxiliary switch S
3Two ends the 3rd capacitor C in parallel
R3, and at auxiliary switch S
3The two ends cross-over connection is by resonant inductance L
rWith clamping capacitance C
cThe resonance branch road that is in series.
According to another aspect of the present invention, provide a kind of modulator approach without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter, wherein: main switch adopts the double polarity sine pulse duration modulation method, and auxiliary switch modulation signal and main switch modulation signal are synchronous.Auxiliary switch turn-offed before full control switch from the diode change of current at main switch, created no-voltage for main switch and opened condition.When the inverter dc bus current flowed to DC side by AC, within the blink that auxiliary switch turn-offs, main switch brachium pontis up and down two Switch Cut-through provided the afterflow path to resonant inductance, makes the resonant inductance stored energy be enough to realize inverter soft switching.When grid-connected inverters, the inverter zero voltage switch all can realize in ac-side current total power factor angular region.When inverter bringing onto load independent operating, the inverter zero voltage switch all can realize in load current total power factor angular region, satisfies the requirement of battery energy storage inverter energy in bidirectional flow.
Compared with prior art, the present invention has following beneficial effect:
Of the present invention simple in structure without auxiliary voltage stress zero voltage switch battery energy storage semi-bridge type inverter, the reverse recovery of the anti-paralleled diode of full control switch is inhibited in the inverter, has reduced electromagnetic interference.All device for power switching realize that no-voltage is open-minded in the circuit, thereby reduce switching loss, improve circuit efficiency, are conducive to improve operating frequency, and then improve power density.The circuit of this inverter and net state under can realize control to output voltage amplitude, phase place and harmonic wave can be used for parallel network reverse or independent inverter in the various batteries to store energy.In addition, the circuit of this inverter also can be used for independent inverter in the various power supplys.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is existing single-phase inverter;
Fig. 2 is a kind of physical circuit figure of the present invention;
Fig. 3 is the second physical circuit figure of the present invention;
Fig. 4 is the third physical circuit figure of the present invention;
Fig. 5 is the 4th kind of physical circuit figure of the present invention;
Fig. 6 is output voltage, the current waveform figure of one embodiment of the invention when being operated in the unity power factor inversion;
Fig. 7 is the pulse control sequential chart of one embodiment of the invention when the dc bus energy flows to AC by the DC side storage battery;
Fig. 8～Figure 15 is the work equivalent electric circuit of one embodiment of the invention switch periods when the dc bus energy flows to AC by the DC side storage battery;
Figure 16 is the main voltage and current waveform of one embodiment of the invention switch periods when the dc bus energy flows to AC by the DC side storage battery;
Figure 17 is the pulse control sequential chart of one embodiment of the invention when the dc bus energy flows to the DC side storage battery by AC;
Figure 18～Figure 26 is the work equivalent electric circuit of one embodiment of the invention switch periods when the dc bus energy flows to the DC side storage battery by AC;
Figure 27 is the main voltage and current waveform of one embodiment of the invention switch periods when the dc bus energy flows to the DC side storage battery by AC.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.Following examples will help those skilled in the art further to understand the present invention, but not limit in any form the present invention.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
With reference to Fig. 2, of the present invention without auxiliary voltage stress zero voltage switch battery energy storage semi-bridge type inverter, comprise the DC side storage battery, DC side dividing potential drop capacitor C
1～C
2, by two full control main switch S that anti-paralleled diode is arranged
1～S
2The single-phase brachium pontis that consists of is connected on the output inductor L between brachium pontis mid point and AC network or the load, wherein: two main switch S of single-phase brachium pontis
1～S
2An electric capacity in parallel is the first capacitor C respectively
R1, the second capacitor C
R2, in DC side dividing potential drop capacitor C
1～C
2And have access to the auxiliary switch S of anti-paralleled diode between the dc bus of single-phase brachium pontis
3, auxiliary switch S
3Two ends the 3rd capacitor C in parallel
R3, and at auxiliary switch S
3The two ends cross-over connection is by resonant inductance L
rWith clamping capacitance C
cThe resonance branch road that is in series.
In the specific embodiment shown in Figure 2, auxiliary switch S
3Collector electrode links to each other with inverter direct-flow side storage battery anode, and emitter links to each other resonant inductance L with single-phase brachium pontis positive bus-bar
rLink to each other clamping capacitance C with single-phase brachium pontis positive bus-bar
cLink to each other with inverter direct-flow side storage battery anode.
Among another embodiment shown in Figure 3, auxiliary switch S
3Collector electrode links to each other with inverter direct-flow side storage battery anode, and emitter links to each other clamping capacitance C with single-phase brachium pontis positive bus-bar
cLink to each other resonant inductance L with single-phase brachium pontis positive bus-bar
rLink to each other with inverter direct-flow side storage battery anode
Among another embodiment shown in Figure 4, auxiliary switch S
3Emitter links to each other with inverter direct-flow side storage battery negative terminal, and collector electrode links to each other clamping capacitance C with single-phase brachium pontis negative busbar
cLink to each other resonant inductance L with single-phase brachium pontis negative busbar
rLink to each other with inverter direct-flow side storage battery negative terminal.
Among another embodiment shown in Figure 5, auxiliary switch S
3Emitter links to each other with inverter direct-flow side storage battery negative terminal, and collector electrode links to each other resonant inductance L with single-phase brachium pontis negative busbar
rLink to each other clamping capacitance C with single-phase brachium pontis negative busbar
cLink to each other with inverter direct-flow side storage battery negative terminal.
Adopt the SPWM modulation without auxiliary voltage Zero-voltage switch half-bridge inverter.
SPWM is divided into unipolarity and bipolarity.Bipolarity when modulation, at whole modulating wave in the cycle, the complementary conducting of S1, S2.The present invention adopts the bipolarity modulation.
If Sine Modulated voltage is u
Ref=msin (ω t), when adopting the bipolarity modulation, switch S 1 duty ratio
Switch S 2 duty ratios
For without auxiliary voltage Zero-voltage switch half-bridge inverter, in inverter direct-flow side bus current direction not simultaneously, inverter control is different, here just take shown in Figure 2 without auxiliary voltage Zero-voltage switch half-bridge inverter when dc bus current flows to AC by DC side and the switch periods of dc bus current when flowing to DC side by AC analyze respectively as example.
The switching pulse of inverter control sequential as shown in Figure 7 when dc bus current flows to AC by DC side.In cycle, inverter has 8 operating states at a switch.Fig. 8 is the work equivalent electric circuit of a switch periods when the dc bus energy flows to AC by the DC side storage battery.Main voltage and current waveform during work as shown in Figure 9.
Stage 1(t
0-t
1):
As shown in Figure 8, main switch S
2With auxiliary switch S
3Be in conducting state, main switch S
1Close, load current is through main switch S
2The anti-paralleled diode afterflow.
Stage 2(t
1-t
2):
As shown in Figure 9, t
1Constantly turn-off auxiliary switch S
3Inductance L
rAnd capacitor C
R3, C
R1Resonance, capacitor C
R3Both end voltage increases, capacitor C
R1Both end voltage reduces.
Stage 3(t
2-t
3):
As shown in figure 10, t
2Constantly, capacitor C
R1Voltage is reduced to zero, main switch S
1The backward diode conducting, resonance finishes.
Stage 4(t
3-t
4):
As shown in figure 11, t
3Constantly, main switch S
1No-voltage is open-minded.Main switch S
1With S
2The anti-paralleled diode change of current is because L
rHave a S
2The reversely restoring process of anti-paralleled diode is suppressed.
Stage 5(t
4-t
5):
As shown in figure 12, t
4Constantly, the change of current finishes, main switch S
2The anti-paralleled diode electric current is reduced to zero.Inductance L
rAnd capacitor C
R3, C
R2Resonance, capacitor C
R2Both end voltage increases, capacitor C
R3Both end voltage reduces.
Stage 6(t
5-t
6):
As shown in figure 13, t
5Constantly, capacitor C
R3Voltage is reduced to zero, auxiliary switch S
3The backward diode conducting, resonance finishes.Auxiliary switch S
3No-voltage is open-minded.
Stage 7(t
6-t
7):
As shown in figure 14, t
6Constantly, main switch S
1Turn-off.Load current is to capacitor C
R2Capacitor C is given in discharge
R1Charging.
Stage 8(t
7-t
8):
As shown in figure 15, t
7Constantly, capacitor C
R1Voltage increases to V
DcCapacitor C
R2Voltage is reduced to zero, and load current is through main switch S
2The anti-paralleled diode afterflow.Main switch S
2No-voltage is open-minded, t
8Moment t
0Circuit state is identical constantly, repeats next cycle.
The switching pulse of inverter control sequential as shown in figure 17 when dc bus current flows to DC side by AC.In cycle, inverter has 9 operating states at a switch.Figure 19～Figure 26 is the work equivalent electric circuit of a switch periods when the dc bus energy flows to the DC side storage battery by AC.Main voltage and current waveform during work as shown in figure 27.
Stage 1 (t
0-t
1):
As shown in figure 18, main switch S
1With auxiliary switch S
3Be in conducting state, main switch S
2Close, load current is through main switch S
1The anti-paralleled diode afterflow.
Stage 2(t
1-t
2):
As shown in figure 19, t
1Constantly turn-off main switch S
3Inductance L
rAnd capacitor C
R3, C
R2Resonance, capacitor C
R3Both end voltage increases, capacitor C
R2Both end voltage reduces.
Stage 3(t
2-t
3):
As shown in figure 20, t
2Constantly, capacitor C
R2Voltage is reduced to zero, main switch S
2The backward diode conducting, resonance finishes.
Stage 4(t
3-t
4):
As shown in figure 21, t
3Constantly, S
2No-voltage is open-minded.Main switch S
2With S
1The anti-paralleled diode change of current is because L
rHave a main switch S
1The reversely restoring process of anti-paralleled diode is suppressed.
Stage 5(t
4-t
5):
As shown in figure 22, t
4Constantly, the change of current finishes, main switch S
1The anti-paralleled diode electric current is reduced to zero.This moment, no-voltage was opened main switch S in order to realize soft switch
1, bridge arm direct pass is to L
rMagnetize.
Stage 6(t
5-t
6):
As shown in figure 23, t
5Constantly, turn-off main switch S
1Inductance L
rAnd capacitor C
R3, C
R1Resonance, capacitor C
R1Both end voltage increases, capacitor C
R3Both end voltage reduces.
Stage 7(t
6-t
7):
As shown in figure 24, t
6Constantly, capacitor C
R3Voltage is reduced to zero, main switch S
3The backward diode conducting, resonance finishes.Main switch S
3No-voltage is open-minded.
Stage 8(t
7-t
8):
As shown in figure 25, t
7Constantly, main switch S
2Turn-off.Load current is to capacitor C
R1Capacitor C is given in discharge
R2Charging.
Stage 9(t
8-t
9):
As shown in figure 26, t
8Constantly, capacitor C
R2Voltage increases to V
DcCapacitor C
R1Voltage is reduced to zero, and load current is through S
1The anti-paralleled diode afterflow.Main switch S
1No-voltage is open-minded, t
9Moment t
0Circuit state is identical constantly, repeats next cycle.
More than be a preferred embodiment of the present invention, for the embodiment shown in Fig. 3-5, its implementation and above-mentioned embodiment illustrated in fig. 2 similar no longer describes in detail.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (6)
1. one kind without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter, it is characterized in that: comprise the inverter direct-flow side storage battery, DC side dividing potential drop electric capacity (C
1, C
2), the single-phase brachium pontis by two full control main switches that anti-paralleled diode arranged consist of is connected on the output inductor (L) between brachium pontis mid point and output loading or the AC network, it is characterized in that two main switch (S of single-phase brachium pontis
1, S
2) difference the first electric capacity (C in parallel
R1), the second electric capacity (C
R2), at inverter dc partial voltage electric capacity (C
1, C
2) and the dc bus of single-phase brachium pontis between have access to the auxiliary switch (S of anti-paralleled diode
3), auxiliary switch (S
3) two ends the 3rd electric capacity (C in parallel
R3), and at auxiliary switch (S
3) the two ends cross-over connection is by resonant inductance (L
r) and clamping capacitance (C
c) the resonance branch road that is in series.
2. according to claim 1ly it is characterized in that described auxiliary switch (S without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter
3) collector electrode links to each other with inverter direct-flow side storage battery anode, emitter links to each other resonant inductance (L with single-phase brachium pontis positive bus-bar
r) link to each other clamping capacitance (C with single-phase brachium pontis positive bus-bar
c) link to each other with inverter direct-flow side storage battery anode.
3. according to claim 1ly it is characterized in that described auxiliary switch (S without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter
3) collector electrode links to each other with inverter direct-flow side storage battery anode, emitter links to each other clamping capacitance (C with single-phase brachium pontis positive bus-bar
c) link to each other resonant inductance (L with single-phase brachium pontis positive bus-bar
r) link to each other with inverter direct-flow side storage battery anode.
4. according to claim 1ly it is characterized in that described auxiliary switch (S without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter
3) emitter links to each other with inverter direct-flow side storage battery negative terminal, collector electrode links to each other clamping capacitance (C with single-phase brachium pontis negative busbar
c) link to each other resonant inductance (L with single-phase brachium pontis negative busbar
r) link to each other with inverter direct-flow side storage battery negative terminal.
5. according to claim 1ly it is characterized in that described auxiliary switch (S without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter
3) emitter links to each other with inverter direct-flow side storage battery negative terminal, collector electrode links to each other resonant inductance (L with single-phase brachium pontis negative busbar
r) link to each other clamping capacitance (C with single-phase brachium pontis negative busbar
c) link to each other with inverter direct-flow side storage battery negative terminal.
6. each described modulator approach without auxiliary voltage zero voltage switch energy storage semi-bridge type inverter according to claim 1-5, it is characterized in that: described main switch adopts the double polarity sine pulse duration modulation method, and auxiliary switch modulation signal and main switch modulation signal are synchronous; Auxiliary switch turn-offed before full control switch from the diode change of current at main switch, created no-voltage for main switch and opened condition; When the inverter dc bus current flowed to DC side by AC, within the blink that auxiliary switch turn-offs, main switch brachium pontis up and down two Switch Cut-through provided the afterflow path to resonant inductance, makes the resonant inductance stored energy be enough to realize inverter soft switching; The inverter zero voltage switch all can realize in inverter ac-side current total power factor angular region.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103762843A (en) * | 2013-10-18 | 2014-04-30 | 江苏大学 | Two-way boost-buck circuit for storage battery energy-storage system and digital control method thereof |
| CN105264733A (en) * | 2013-06-28 | 2016-01-20 | 艾思玛太阳能技术股份公司 | Circuit arrangement for inline voltage supply, use of such a circuit arrangement and device having such a circuit arrangement |
| CN110504761A (en) * | 2018-05-17 | 2019-11-26 | 新动力等离子体株式会社 | Resonance network for plasma electrical source and the electric power supply apparatus for plasma generator |
| CN110729739A (en) * | 2018-07-17 | 2020-01-24 | 董振隆 | Virtual reactive compensator |
| CN110816321A (en) * | 2019-08-12 | 2020-02-21 | 华为技术有限公司 | Wireless charging transmitting device, transmitting method and wireless charging system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105264733A (en) * | 2013-06-28 | 2016-01-20 | 艾思玛太阳能技术股份公司 | Circuit arrangement for inline voltage supply, use of such a circuit arrangement and device having such a circuit arrangement |
| CN105264733B (en) * | 2013-06-28 | 2018-08-28 | 艾思玛太阳能技术股份公司 | Circuit device of inline voltage supply and application thereof, the equipment with circuit device |
| CN103762843A (en) * | 2013-10-18 | 2014-04-30 | 江苏大学 | Two-way boost-buck circuit for storage battery energy-storage system and digital control method thereof |
| CN103762843B (en) * | 2013-10-18 | 2016-04-06 | 江苏大学 | For Bidirectional up-down volt circuit and the digital control method thereof of energy-storage system of accumulator |
| CN110504761A (en) * | 2018-05-17 | 2019-11-26 | 新动力等离子体株式会社 | Resonance network for plasma electrical source and the electric power supply apparatus for plasma generator |
| CN110504761B (en) * | 2018-05-17 | 2023-08-22 | 新动力等离子体株式会社 | Resonant network for plasma power supply and power supply device for plasma generator |
| CN110729739A (en) * | 2018-07-17 | 2020-01-24 | 董振隆 | Virtual reactive compensator |
| CN110816321A (en) * | 2019-08-12 | 2020-02-21 | 华为技术有限公司 | Wireless charging transmitting device, transmitting method and wireless charging system |
| CN110816321B (en) * | 2019-08-12 | 2022-11-11 | 华为技术有限公司 | Wireless charging transmitting device, transmitting method and wireless charging system |
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| CN102969925B (en) | 2015-08-26 |
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