CN103259440B - A kind of inverter power supply device - Google Patents
A kind of inverter power supply device Download PDFInfo
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- CN103259440B CN103259440B CN201210035603.6A CN201210035603A CN103259440B CN 103259440 B CN103259440 B CN 103259440B CN 201210035603 A CN201210035603 A CN 201210035603A CN 103259440 B CN103259440 B CN 103259440B
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Abstract
The invention discloses a kind of inverter power supply device, for the converting direct-current power into alternating-current power that dc source is exported, comprise prime current feedback circuit and rear class inverter circuit, described current feedback circuit comprises: half-bridge converter, isolating transformer and the rectification circuit of serial connection successively; Described rear class inverter circuit is single BUCK inverter circuit. Utilize inverter power supply device of the present invention, can, in the situation that ensureing energy conversion efficiency, reduce the complexity of controlling, facilitate idle adjusting and power expanding.
Description
Technical field
The present invention relates to voltage transitions technical field, be specifically related to a kind of inverter power supply device.
Background technology
At present, in field of photovoltaic power generation, or generate electricity by way of merging two or more grid systems as main taking integral type. Grid-connected photovoltaic systemBy combining inverter, the direct current of solar panel is converted to and line voltage exchanging with frequency, homophaseElectricity also flows to electrical network, and therefore, combining inverter is the nucleus equipment of grid-connected photovoltaic system, it canLean on property, high efficiency and security meeting to have influence on whole electricity generation system, be directly connected to power station generated energy and operationStable.
Grid-connected micro-inverter (being called for short micro-inverter) is connected with single photovoltaic module, can be by photovoltaic groupThe direct current of part output is directly converted to alternating current and is transferred to electrical network, and ensures output current and line voltageFrequency, phase place are in full accord. In two-stage type grid-connected photovoltaic system, combining inverter only need carry out contraryBecome and control, photovoltaic array MPPT maximum power point tracking (MPPT) is completed by prime DC/DC converter, andNet inverter is realized system power balance by the output voltage of controlling DC/DC converter.
In the prior art, micro-inverter topology major part commutates in conjunction with rear class power frequency with inverse-excitation type primeRealize, as shown in Figure 1. Wherein, the switching tube Q1 in prime controls by soft switch, rear classIn four switch transistor T 1-T4 power frequencies switch capacitor C 1 end Energy Transfer to electrical network, Fig. 2 is Fig. 1 instituteShow the voltage waveform at micro-inverter intermediate capacitance C1 two ends.
As seen from Figure 2, traditional Miniature inverter prime reverse excitation circuit output is not constant direct currentElectricity, cannot realize idle adjusting. In addition, in micro-inverter of this structure, transformer T not only usesIn energy storage, but also to be used for transmitting energy, therefore need out air gap, therefore prime reverse excitation circuit cannot be byPower does greatly, even if power does greatly, efficiency is also very low. And, in order to realize soft switch, not only need choosingWith the controller of superior performance, and the upper more complicated of design, sometimes also need to increase some auxiliary circuits.
Summary of the invention
The problem that the embodiment of the present invention exists for above-mentioned prior art, provides a kind of inverter power supply device,Ensure, in the situation of energy conversion efficiency, to reduce the complexity of controlling, facilitate power expanding.
For this reason, the embodiment of the present invention provides following technical scheme:
A kind of inverter power supply device, for the converting direct-current power into alternating-current power that dc source is exported, before comprisingLevel current feedback circuit and rear class inverter circuit, described current feedback circuit comprises: half bridging of serial connection successivelyParallel operation, isolating transformer and rectification circuit; Described rear class inverter circuit is single BUCK inverter circuit.
Preferably, described half-bridge converter comprises: the first inductance, the second inductance, the first switching device andTwo switching devices;
The first inductance and the first switching device are connected in series, and the first end of the first inductance connects described dc sourceAnode, the second end of the first inductance connects the former of the first end of the first switching device and described isolating transformerThe Same Name of Ends on limit, the second end of the first switching device connects the negative terminal of described dc source;
The second inductance and second switch device are connected in series, and the first end of the second inductance connects described dc sourceAnode, the second end of the second inductance connects the former of the first end of second switch device and described isolating transformerThe different name end on limit, the second end of second switch device connects the negative terminal of described dc source.
Preferably, described the first switching device and second switch device be with different pulse signal trigger actions,And at any time, in described the first switching device and second switch device, there is at least one conducting.
Preferably, described rectification circuit is full-wave rectifying circuit, comprising: four diodes, wherein the 1Together with the negative electrode of the anode of utmost point pipe and the 3rd diode, be connected to the Same Name of Ends of the secondary of described isolating transformer,Together with the negative electrode of the anode of the second diode and the 4th diode, be connected to the secondary of described isolating transformerDifferent name end;
The negative electrode of the first diode is connected with the negative electrode of the second diode and as described current feedback circuitThe first output;
The anode of the 3rd diode is connected with the anode of the 4th diode and as described current feedback circuitThe second output.
Preferably, described single BUCK inverter circuit comprises: the first filter circuit, the BUCK of serial connection successivelyCircuit and full bridge inverter;
Described the first filter circuit, is connected between two outputs of described current feedback circuit, for filterExcept the high fdrequency component in described current feedback circuit output voltage, store that the transmission of prime feed circuit comes simultaneouslyEnergy;
Described BUCK circuit, for being converted to lower by the DC voltage of described current feedback circuit outputDC voltage and output;
Described full bridge inverter, for being converted to interchange by the DC voltage of described BUCK circuit outputVoltage.
Preferably, described BUCK circuit comprises: the 7th switching device, the 5th diode and the 3rd inductance,Wherein, the first end of the 7th switching device connects the first output of described current feedback circuit, and minion is closedThe second end of device connects the negative electrode of the 5th diode and the first end of the 3rd inductance; The anode of the 5th diodeConnect the second output of described current feedback circuit; The second output of the 3rd inductance is as described BUCKThe output of circuit is connected to described full bridge inverter.
Preferably, described full bridge inverter comprises: four switching devices, wherein:
Together with the first end of the first end of the 3rd switching device and the 4th switching device, be connected to described BUCKThe output of circuit;
Together with the second end of the second end of the 5th switching device and the 6th switching device, be connected to the described the 52The anode of utmost point pipe;
The second end of the 3rd switching device is connected as described inverter with the first end of the 5th switching deviceAn output of device, the conduct that is connected with the first end of the 6th switching device of the second end of the 4th switching deviceAnother output of described inverter power supply device.
Preferably, the front half period within a work period, the 7th switching device touches with high-frequency pulse signalStart to do, the 3rd switching device and the 6th switching device conducting, the 4th switching device and the 5th switching device closeDisconnected; In the later half cycle within a work period, the 7th switching device triggers moving with described high-frequency pulse signalDo, the 3rd switching device and the 6th switching device turn-off, the 4th switching device and the 5th switching device conducting.
Preferably, described high-frequency pulse signal is pwm pulse signal.
Preferably, described single BUCK inverter circuit also comprises:
The second filter circuit, is connected to the output of described BUCK circuit and the sun of described the 5th diodeBetween the utmost point, for the high fdrequency component of the DC voltage of BUCK circuit output described in filtering, store simultaneouslyThe energy that the transmission of prime feed circuit comes.
The inverter power supply device that the embodiment of the present invention provides, adopts prime half-bridge feed and rear class list Buck to addThe two-stage topologies of full-bridge inverting, is not only applicable to the application scenario of micro-inverter, but also is applicable to littleThe occasion of power band isolation applications. Prime adopts current feed mode, before inverse-excitation type in prior artLevel topological structure, is more conducive to power expanding. And, the derailing switch in prime current feed topological structurePart does not need to consider straight-through problem, controls without dead band, and not only control is simpler, and owing to thering is winkTime impedance very high inductance existence, make switching device can realize no-voltage turn-on and turn-off, reducedSwitching loss, has improved whole efficiency.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, below will be to implementingIn example, the accompanying drawing of required use is briefly described, and apparently, the accompanying drawing in the following describes is onlySome embodiment that record in the present invention, for those of ordinary skill in the art, can also be according to theseAccompanying drawing obtains other accompanying drawing.
Fig. 1 is micro-inverter topology schematic diagram in prior art;
Fig. 2 is the voltage waveform at the two ends of micro-inverter intermediate capacitance C1 shown in Fig. 1;
Fig. 3 is the principle schematic of embodiment of the present invention inverter power supply device;
Fig. 4 is the concrete topological structure schematic diagram of the one of embodiment of the present invention inverter power supply device;
Fig. 5 is drive waveforms and inductive current and the transformer of switching device S1, S2 in the embodiment of the present inventionOriginal edge voltage current waveform schematic diagram;
Fig. 6 is that in the embodiment of the present invention, prime current feedback circuit is driving the first stage under signal shown in Fig. 5Time current loop schematic diagram;
Fig. 7 is that in the embodiment of the present invention, prime current feedback circuit is driving second stage under signal shown in Fig. 5Time current loop schematic diagram;
Fig. 8 is that in the embodiment of the present invention, prime current feedback circuit is driving the phase III under signal shown in Fig. 5Time current loop schematic diagram;
Fig. 9 is that in the embodiment of the present invention, prime current feedback circuit is driving fourth stage under signal shown in Fig. 5Time current loop schematic diagram;
Figure 10 is the driving signal of each switching device in the rear class inverter circuit course of work in the embodiment of the present inventionSchematic diagram;
Figure 11 is that in the embodiment of the present invention, rear class inverter circuit touches at line voltage positive half period pwm pulseCurrent loop schematic diagram while sending out conducting;
Figure 12 is that in the embodiment of the present invention, rear class inverter circuit closes at line voltage positive half period pwm pulseCurrent loop schematic diagram when disconnected;
Figure 13 is that in the embodiment of the present invention, rear class inverter circuit touches at line voltage negative half-cycle pwm pulseCurrent loop schematic diagram while sending out conducting;
Figure 14 is that in the embodiment of the present invention, rear class inverter circuit closes at line voltage negative half-cycle pwm pulseCurrent loop schematic diagram when disconnected.
Detailed description of the invention
In order to make those skilled in the art person understand better the scheme of the embodiment of the present invention, below in conjunction with accompanying drawingWith embodiment, the embodiment of the present invention is described in further detail.
As shown in Figure 3, be the principle schematic of embodiment of the present invention inverter power supply device.
The converting direct-current power into alternating-current power of this inverter power supply device for dc source 30 is exported, before comprisingLevel current feedback circuit 31 and rear class inverter circuit 32. Wherein, described current feedback circuit 31 comprises:Half-bridge converter 311, isolating transformer 312 and the rectification circuit 313 of serial connection successively; Described rear class inversionCircuit 32 is specially single BUCK inverter circuit.
Fig. 4 is the concrete topological structure schematic diagram of the one of embodiment of the present invention inverter power supply device.
In this embodiment, the half-bridge converter in current feedback circuit 31 comprises: the first inductance L 1,Two inductance L 2, the first switching device S1 and second switch device S2. Wherein:
The first inductance L 1 and the first switching device S1 are connected in series, and the first end of the first inductance L 1 connects instituteState the anode of dc source 30, the second end of the first inductance L 1 connects the first end of the first switching device S1With the Same Name of Ends on the former limit of isolating transformer T, the second end of the first switching device S1 connects described direct currentThe negative terminal in source 30;
The second inductance L 2 is connected in series with second switch device S2, and the first end of the second inductance L 2 connects instituteState the anode of dc source 30, the second end of the second inductance L 2 connects the first end of second switch device S2With the different name end on the former limit of isolating transformer T, the second end of second switch device S2 connects described direct currentThe negative terminal in source 30.
In this embodiment, the rectification circuit in current feedback circuit 31 is full-wave rectifying circuit, comprising:Four diodes are respectively the first diode D1, the second diode D2, the 3rd diode D3 and the 4thDiode D4. Wherein:
Together with the negative electrode of the anode of the first diode D1 and the 3rd diode D3, be connected to isolating transformer TThe Same Name of Ends of secondary, be connected to together with the negative electrode of the anode of the second diode D2 and the 4th diode D4The different name end of the secondary of isolating transformer T;
The negative electrode of the first diode D1 is connected with the negative electrode of the second diode D2, and its tie point is as describedThe first output of current feedback circuit 31;
The anode of the 3rd diode D3 is connected with the anode of the 4th diode D4, and its tie point is as describedThe second output of current feedback circuit 31.
In this embodiment, rear class inverter circuit 32 is that described single BUCK inverter circuit comprises: string successivelyThe first filter circuit, BUCK circuit and the full bridge inverter that connect. Wherein:
Described the first filter circuit, is connected between two outputs of described current feedback circuit 31, usesHigh fdrequency component in 31 output voltages of current feedback circuit described in filtering stores prime feed circuit simultaneouslyThe energy that transmission comes. As shown in Figure 4, described the first filter circuit is specially the first capacitor C 1.
Described BUCK circuit, is converted to for the DC voltage that described current feedback circuit 31 is exportedLow DC voltage output. As shown in Figure 4, this BUCK circuit comprises: the 7th switching device S7,The 5th diode D5 and the 3rd inductance L 3. Wherein: the first end of the 7th switching device S7 connects described electricityThe first output of current feed circuit 31, the second end of the 7th switching device S7 connects the 5th diode D5Negative electrode and the first end of the 3rd inductance L 3; Current feed electricity described in the anodic bonding of the 5th diode D5Second output on road 31; The second output of the 3rd inductance L 3 is as the output of described BUCK circuitEnd is connected to described full bridge inverter.
Described full bridge inverter, for being converted to interchange by the DC voltage of described BUCK circuit outputVoltage. As shown in Figure 4, this full bridge inverter comprises: four switching devices are respectively the 3rd derailing switchesPart S3, the 4th switching device S4, the 5th switching device S5 and the 6th switching device S6. Wherein:
Described in being connected to together with the first end of the first end of the 3rd switching device S3 and the 4th switching device S4The output of BUCK circuit;
Together with the second end of the second end of the 5th switching device S5 and the 6th switching device S6, be connected to describedThe anode of five diode D5;
The second end of the 3rd switching device S3 is connected with the first end of the 5th switching device S5, and its tie point is doneFor an output of described inverter power supply device, the second end of the 4th switching device S4 and the 6th derailing switchThe first end of part S6 is connected, and its tie point is as another output of described inverter power supply device.
It should be noted that, in inverter power supply device of the present invention, described rear class inverter circuit 32 also can enterOne step comprises: the second filter circuit, is connected to output and described the five or two utmost point of described BUCK circuitBetween the anode of pipe D5, for the high fdrequency component of the DC voltage of BUCK circuit output described in filtering.In Fig. 4, described the second filter circuit is specially the second capacitor C 2. This second capacitor C 2 can be chosen appearanceBe worth less electric capacity, for example thin-film capacitor, the life-span is long, has increased reliability and the life-span of inverter.
In inverter power supply device of the present invention, described rear class inverter circuit 32 also can further comprise: outputFilter circuit, is connected between the output of described inverter power supply device, and described output filter circuit can beL-type, the topological structures such as LC type, LCL type.
Above-mentioned the first switching device S1 to the seven switching device S7 can be MOSFET, correspondingly, onThe first end of stating switching device refers to that the D utmost point of MOSFET, the second end refer to the S utmost point of MOSFET.
Above-mentioned the first switching device S1 to the seven switching device S7 can be also IGBT, correspondingly, above-mentionedThe first end of switching device refers to the colelctor electrode of IGBT, and the second end refers to the emitter stage of IGBT.
Above-mentioned dc source 30 can be a generator, such as solar generator.
Work below in conjunction with Fig. 4 to prime current feedback circuit in embodiment of the present invention inverter power supply devicePrinciple elaborates.
As shown in Figure 5, be drive waveforms and inductive current and the transformer primary side electricity of switching device S1, S2Current voltage waveform schematic diagram.
As seen from Figure 5, the first switching device S1, second switch device S2 are with different pulse signalsTrigger action, but in any one moment, these two switching device S1, S2 always have one to be conducting orConducting, to guarantee that the electric current in the first inductance L 1 and the second inductance L 2 has unimpeded loop.
In the time that the first switching device S1 conducting, second switch device S2 turn-off, the first inductance L 1 energy storage,Current i 1 linear growth of first inductance L 1 of flowing through. The second inductance L 2 releases energy, second inductance of flowing throughThe linear decline of current i 2 of L2. The energy discharging is coupled to the secondary of transformer T by the former limit of transformer T.Secondary, the second diode D2 and the 3rd diode D3 of transformer T form loop, transfer energy toLoad end.
When second switch device S2 conducting, when the first switching device S1 turn-offs, the second inductance L 2 energy storage,Current i 2 linear growths of second inductance L 2 of flowing through. The first inductance L 1 releases energy, first inductance of flowing throughThe linear decline of current i 1 of L1. The energy discharging is coupled to the secondary of transformer T by the former limit of transformer T.Secondary, the first diode D1 and the 4th diode D4 of transformer T form loop, transfer energy toLoad end.
In the time of simultaneously conducting of the first switching device S1, second switch device S2, the first inductance L 1, secondInductance L 2 is directly connected on dc source 30 two ends, and two inductance are all in energy storage state, current i 1, i2Linear growth. Now transformer T primary side short circuit,, to secondary side transferring energy, load end does not only depend on firstCapacitor C 1 electric discharge maintains.
In the embodiment of the present invention, prime current feedback circuit work period is divided into four-stage, as Fig. 5Shown in, from t0, finish to t4. Respectively this four-stage is elaborated below.
In the following description, represent described dc source 30 with PV.
First stage t0-t1: in the t0 moment, the first switching device S1, second switch device S2 conducting,The first inductance L 1, the second inductance L 2 are directly connected on dc source PV two ends, the first inductance L 1, the second electricityL2 is all in energy storage state in sense, current i 1, i2 linear growth. Now, the short circuit of transformer T primary side,Not to secondary side transferring energy, load end only depends on the first capacitor C 1 electric discharge to maintain.
At the current loop of first stage as shown in Figure 6, specific as follows:
Transformer T primary side current loop: PV → L1 → S1 → PV;
PV→L2→S2→PV；
Transformer T secondary side current loop: C1 → load → C1.
Second stage t1-t2: in the t1 moment, second switch device S2 turn-offs, now the first switching deviceS1 is in conducting state. The first inductance L 1 is also connected on dc source PV two ends, in energy storage state, and electricityStream i1 linear growth. The second inductance L 2 releases energy, and current i 2 is linear to decline. The energy discharging is by becomingThe secondary of transformer T is coupled on the former limit of depressor T, the secondary of transformer T, the second diode D2,One capacitor C 1 and load, the 3rd diode D3 form loop, transfer energy to the first capacitor C 1 and negativeCarry end.
At the current loop of second stage as shown in Figure 7, specific as follows:
Transformer T primary side current loop: PV → L1 → S1 → PV;
PV→L2→T→S1→PV；
Transformer T secondary side current loop: T → D2 → C1 and load → D3 → T.
Phase III t2-t3: in the t2 moment, second switch device S2 conducting. This stage first switching deviceS1 and second switch device S2 are all in conducting state, and the first inductance L 1, the second inductance L 2 are directly connected onDc source PV two ends, two inductance are all in energy storage state, current i 1, i2 linear growth. Now becomeThe short circuit of depressor T primary side, not to secondary side transferring energy, load end only depends on the first capacitor C 1 electric discharge to maintain.
At the current loop of phase III as shown in Figure 8, specific as follows:
Transformer primary side current loop: PV → L1 → S1 → PV;
PV→L2→S2→PV；
Circuit Fault on Secondary Transformer current loop: C1 → load → C1.
Fourth stage t3-t4: in the t3 moment, the first switching device S1 turn-offs, now second switch deviceS2 is in conducting state; The second inductance L 2 is also connected on dc source PV two ends, in energy storage state, and electricityStream i2 linear growth. The first inductance L 1 releases energy, and current i 1 is linear to decline. The energy discharging is by becomingThe secondary of transformer T is coupled on the former limit of depressor T, the secondary of transformer T, the first diode D1,One capacitor C 1 and load, the 4th diode D4 form loop, transfer energy to the first capacitor C 1 and negativeCarry end.
At the current loop of fourth stage as shown in Figure 9, specific as follows:
Transformer primary side current loop: PV → L2 → S2 → PV;
PV→L1→T→S2→PV；
Circuit Fault on Secondary Transformer current loop: T → D1 → C1 and load → D4 → T.
Above-mentioned t0-t4 is a complete cycle, the four-stage before circuit state afterwards repeats.
Continue the work to rear class inverter circuit in embodiment of the present invention inverter power supply device in conjunction with Fig. 4 belowPrinciple elaborates.
A work period of rear class inverter circuit was made up of front half period and later half cycle, corresponding inversion electricityThe course of work in Lu Yi work period is divided into two stages, is respectively that line voltage is the work of timingWorking stage when stage and line voltage are negative.
In the work period, in rear class inverter circuit, a kind of drive signal waveform of each switching device is as figureShown in 10.
In first stage 0～T/2 (T represents a power frequency period, i.e. mains voltage signal cycle), correspondenceThe working stage that is timing in line voltage, the 7th switching device is with high-frequency pulse signal trigger action, and the 3rdThe driving signal of switching device S3 and the 6th switching device S6 keeps high level, in conducting state; The 4thThe driving signal of switching device S4 and the 5th switching device S5 keeps low level, in off state.
In this stage, in the time of the 7th switching device S7 conducting, the 5th diode D5 bears backward voltage,In blocking state, current loop is: Vdc+ → S7 → L3 → S3 → AC → S6 → Vdc-, and as Figure 11Shown in.
In this stage, in the time that the 7th switching device S7 turn-offs, the electric current in the 3rd inductance L 3 can not suddenly change,The 5th diode D5 conducting, forms continuous current circuit: L3 → S3 → AC → S6 → D5 → L3, as Figure 12Shown in.
At second stage T/2～T, the working stage while being negative corresponding to line voltage, the 7th switching deviceWith described high-frequency pulse signal trigger action, the driving letter of the 4th switching device S4 and the 5th switching device S5Number keep high level, in conducting state; The driving letter of the 3rd switching device S3 and the 6th switching device S6Number keep low level, in off state.
In this stage, in the time of the 7th switching device S7 conducting, the 5th diode D5 bears backward voltage,In blocking state, current loop is: Vdc+ → S7 → L3 → S4 → AC → S5 → Vdc-, and as Figure 13Shown in.
In this stage, in the time that the 7th switching device S7 turn-offs, the electric current in the 3rd inductance L 3 can not suddenly change,The 5th diode D5 conducting, forms continuous current circuit: L3 → S4 → AC → S5 → D5 → L3, as Figure 14Shown in.
Above-mentioned high-frequency pulse signal can be pwm pulse signal.
It should be noted that, prime current feed road and rear class inverter circuit in the embodiment of the present invention can be onlyVertical work, in other words, the driving of prime switching device S1 and switching device S2 and rear class switching device S3～S7Driving can independently control, be independent of each other.
Can be found out that by the above-mentioned course of work inverter power supply device that the embodiment of the present invention provides adopts primeHalf-bridge feed and rear class list BUCK add the two-stage topologies of full-bridge inverting, is not only applicable to micro-inverterApplication scenario, but also be applicable to the occasion of small-power band isolation applications. Prime adopts current feed mode,For inverse-excitation type prime topological structure in prior art, be more conducive to power expanding. And, prime electricitySwitching device in current feed topological structure does not need to consider straight-through problem, controls, not only control without dead bandMake simplyr, and owing to thering is the existence of the inductance that transient impedance is very high, switching device can be realizedNo-voltage turn-on and turn-off, have reduced switching loss, have improved whole efficiency. In addition, isolate by primeThe electrical isolation of transformer, has solved the problem of leakage current well, without increasing leakage current absorption plant,Be more conducive to raise the efficiency.
In addition, because prime current feedback circuit is exported constant direct current, thereby can make rear class inversion electricityHigh-frequency inversion is carried out on road, realizes idle adjusting.
Above the embodiment of the present invention is described in detail, has applied detailed description of the invention herein to thisBright elaboration, the explanation of above embodiment is just for helping to understand equipment of the present invention; Meanwhile, rightIn one of ordinary skill in the art, according to thought of the present invention, in specific embodiments and applicationsAll will change, in sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. an inverter power supply device, for the converting direct-current power into alternating-current power that dc source is exported, itsBe characterised in that, comprise prime current feedback circuit and rear class inverter circuit, described current feedback circuit comprises:Half-bridge converter, isolating transformer and the rectification circuit of serial connection successively; Described rear class inverter circuit is single BUCKInverter circuit;
Described half-bridge converter comprises: the first inductance, the second inductance, the first switching device and second switchDevice;
The first inductance and the first switching device are connected in series, and the first end of the first inductance connects described direct currentThe anode in source, the second end of the first inductance connects first end and the described isolating transformer of the first switching deviceThe Same Name of Ends on former limit, the second end of the first switching device connects the negative terminal of described dc source;
The second inductance and second switch device are connected in series, and the first end of the second inductance connects described direct currentThe anode in source, the second end of the second inductance connects first end and the described isolating transformer of second switch deviceThe different name end on former limit, the second end of second switch device connects the negative terminal of described dc source;
Described rectification circuit is full-wave rectifying circuit, comprising: four diodes, wherein the first diodeTogether with the negative electrode of anode and the 3rd diode, be connected to the Same Name of Ends of the secondary of described isolating transformer, secondTogether with the negative electrode of the anode of diode and the 4th diode, be connected to the different name of the secondary of described isolating transformerEnd;
The negative electrode of the first diode is connected with the negative electrode of the second diode and as described current feedback circuitThe first output;
The anode of the 3rd diode is connected with the anode of the 4th diode and as described current feedback circuitThe second output;
Described the first switching device and second switch device be with different pulse signal trigger actions, and, there is at least one conducting any time in described the first switching device and second switch device, is specially:In the time that the first switching device conducting, second switch device turn-off, the first inductive energy storage, first inductance of flowing throughElectric current linear growth, the second inductance releases energy, the electric current of second inductance of flowing through is linear to decline, and dischargesEnergy be coupled to the secondary of transformer by the former limit of transformer, the secondary of transformer, the second diode,Load and the 3rd diode form loop, transfer energy to load end;
When second switch break-over of device, when the first switching device turn-offs, the second inductive energy storage, flows through secondThe electric current linear growth of inductance, the first inductance releases energy, the linear decline of electric current of first inductance of flowing through,The energy discharging is coupled to the secondary of transformer, the secondary of transformer, the one or two utmost point by the former limit of transformerPipe, load and the 4th diode form loop, transfer energy to load end;
In the time of the conducting simultaneously of the first switching device, second switch device, the first inductance, the second inductance are directBe connected on dc source two ends, two inductance are all in energy storage state, flow through the first inductance and the second inductanceElectric current linear growth, now transformer primary side short circuit,, to secondary side transferring energy, load end does not only depend onThe first capacitor discharge maintains.
2. inverter power supply device according to claim 1, is characterized in that, described single BUCK is contraryPower transformation road comprises: the first filter circuit, BUCK circuit and the full bridge inverter of serial connection successively;
Described the first filter circuit, is connected between two outputs of described current feedback circuit, forHigh fdrequency component described in filtering in current feedback circuit output voltage stores the transmission of prime feed circuit simultaneouslyThe energy coming;
Described BUCK circuit, for being converted to lower by the DC voltage of described current feedback circuit outputDC voltage output;
Described full bridge inverter, for being converted to alternating current by the DC voltage of described BUCK circuit outputPress.
3. inverter power supply device according to claim 2, is characterized in that, described BUCK circuitComprise: the 7th switching device, the 5th diode and the 3rd inductance, wherein, first of the 7th switching deviceEnd connects the first output of described current feedback circuit, and the second end of the 7th switching device connects the five or twoThe first end of the negative electrode of utmost point pipe and the 3rd inductance; Current feedback circuit described in the anodic bonding of the 5th diodeThe second output; The second end of the 3rd inductance is connected to described complete as the output of described BUCK circuitBridge inverter circuit.
4. inverter power supply device according to claim 3, is characterized in that, described full-bridge inverting electricityRoad comprises: four switching devices, wherein:
Together with the first end of the first end of the 3rd switching device and the 4th switching device, be connected to described BUCK electricityThe output on road;
Together with the second end of the second end of the 5th switching device and the 6th switching device, be connected to the described the 52The anode of utmost point pipe;
The second end of the 3rd switching device is connected as described inverter with the first end of the 5th switching deviceAn output of device, the first end phase continuous cropping of the second end of the 4th switching device and the 6th switching deviceFor another output of described inverter power supply device.
5. inverter power supply device according to claim 4, is characterized in that, a work periodIn the front half period, the 7th switching device is with high-frequency pulse signal trigger action, the 3rd switching device and theSix switching device conductings, the 4th switching device and the 5th switching device turn-off; Within a work periodIn the later half cycle, the 7th switching device is with described high-frequency pulse signal trigger action, the 3rd switching device andSix switching devices turn-off, the 4th switching device and the 5th switching device conducting.
6. inverter power supply device according to claim 5, is characterized in that, described high-frequency impulse letterNumber be pwm pulse signal.
7. according to the inverter power supply device described in claim 3 to 6 any one, it is characterized in that, described inSingle BUCK inverter circuit also comprises:
The second filter circuit, is connected to the output of described BUCK circuit and the anode of described the 5th diodeBetween, for the high fdrequency component of the DC voltage of BUCK circuit output described in filtering, store prime simultaneouslyThe energy that feed circuit transmission comes.
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| CN201210035603.6A CN103259440B (en) | 2012-02-16 | 2012-02-16 | A kind of inverter power supply device |
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| CN111030457B (en) * | 2018-10-09 | 2023-05-23 | 中国电力科学研究院有限公司 | ISOP type direct-current distribution transformer and control method thereof |
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|---|---|---|---|---|
| US5932995A (en) * | 1998-03-03 | 1999-08-03 | Magnetek, Inc. | Dual buck converter with coupled inductors |
| CN101350557A (en) * | 2007-07-18 | 2009-01-21 | 华为技术有限公司 | Apparatus for adjusting power supply |
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|---|---|---|---|---|
| US5932995A (en) * | 1998-03-03 | 1999-08-03 | Magnetek, Inc. | Dual buck converter with coupled inductors |
| CN101350557A (en) * | 2007-07-18 | 2009-01-21 | 华为技术有限公司 | Apparatus for adjusting power supply |
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| A Review of the Single Phase Photovoltaic Module Integrated Converter Topologies With Three Different DC Link Configurations;Quan Li et al;《IEEE TRANSACTIONS ON POWER ELECTRONICS》;20080531;第1329页第二栏倒数第一段-第1330页第一栏倒数第一段和图11、34、37 * |
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