CN103259438A - Inverter power source device - Google Patents
Inverter power source device Download PDFInfo
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- CN103259438A CN103259438A CN201210035589XA CN201210035589A CN103259438A CN 103259438 A CN103259438 A CN 103259438A CN 201210035589X A CN201210035589X A CN 201210035589XA CN 201210035589 A CN201210035589 A CN 201210035589A CN 103259438 A CN103259438 A CN 103259438A
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Abstract
The invention discloses an inverter power source device used for converting a direct current output by a direct-current power source into an alternating current. The inverter power source device comprises a preceding-stage current feed circuit and a posterior-stage inverter circuit. The current feed circuit comprises a full-bridge converter, an isolation transformer and a rectifying circuit, wherein the full-bridge converter, the isolation transformer and the rectifying circuit are connected in series in sequence. The posterior-stage inverter circuit comprises a tank circuit and a unipolar full-bridge high-frequency inverter circuit, wherein the tank circuit is connected between two output ends of the current feed circuit, and the unipolar full-bridge high-frequency inverter circuit is used for converting direct voltage output by the current feed circuit into alternating voltage. Due to the inverter power source device, under the condition that energy conversion efficiency is ensured, complexity of control can be reduced, and reactive power adjusting and power expansion are convenient.
Description
Technical field
The present invention relates to the 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, still generate electricity by way of merging two or more grid systems based on integral type.Grid-connected photovoltaic system by combining inverter with the direct current of solar panel convert to line voltage with frequently, the alternating current of homophase and flow to electrical network, therefore, combining inverter is the nucleus equipment of grid-connected photovoltaic system, its reliability, high efficiency and fail safe meeting have influence on the whole generating system, are directly connected to plant generator amount and stable.
Grid-connected little inverter (being called for short little inverter) links to each other with single photovoltaic module, the direct current of photovoltaic module output can be directly converted to alternating current and be transferred to electrical network, and guarantee that output current and line voltage frequency, phase place are in full accord.In the two-stage type grid-connected photovoltaic system, combining inverter only need carry out inversion control, photovoltaic array MPPT maximum power point tracking (MPPT) is finished by prime DC/DC converter, and combining inverter is realized the system power balance by the output voltage of control DC/DC converter.
In the prior art, little inverter topology major part commutates to realize in conjunction with a back level power frequency with the inverse-excitation type prime, as shown in Figure 1.Wherein, the switching tube Q1 in the prime controls by soft switch, and four switch transistor T 1-T4 power frequencies switchings in the level of back are transferred to electrical network with capacitor C 1 end energy, and Fig. 2 is the voltage waveform at little inverter intermediate capacitance C1 shown in Figure 1 two ends.
As seen from Figure 2, what traditional miniature inverter prime reverse excitation circuit was exported is not constant DC, can't realize idle adjusting.In addition, in little inverter of this structure, transformer T not only will be used for energy storage, but also will be used for the transmission energy, therefore need open air gap, so the prime reverse excitation circuit can't be done power greatly, even power is done greatly, efficient is also very low.And, in order to realize soft switch, not only need to select for use the controller of superior performance, and design and go up more complicated, also need to increase some auxiliary circuits sometimes.
Summary of the invention
The embodiment of the invention provides a kind of inverter power supply device at the problem that above-mentioned prior art exists, and under the situation that guarantees energy conversion efficiency, reduces the complexity of control, makes things convenient for power expanding.
For this reason, the embodiment of the invention provides following technical scheme:
A kind of inverter power supply device is used for converting the direct current of DC power supply output to alternating current, comprises prime current feedback circuit and back level inverter circuit, and described current feedback circuit comprises: Chuan Jie full-bridge converter, isolating transformer and rectification circuit successively; Described back level inverter circuit comprises: accumulator and unipolarity full-bridge high-frequency inverter circuit, described accumulator is connected between two outputs of described current feedback circuit, and described unipolarity full-bridge high-frequency inverter circuit is used for the direct voltage of described current feedback circuit output is converted to alternating voltage.
Preferably, described full-bridge converter comprises: first inductance, first switching device, second switch device, the 3rd switching device and the 4th switching device;
First end of first inductance connects the anode of described DC power supply, second end of first inductance connects first end of first switching device and first end of the 3rd switching device, and second end of second switch device is connected the negative terminal of described DC power supply with second end of the 4th switching device;
Second end of first switching device is connected to the end of the same name on the former limit of described isolating transformer with first end of second switch device, and second end of the 3rd switching device is connected to the different name end on the former limit of described isolating transformer with first end of the 4th switching device.
Preferably, described first switching device and the 4th switching device are with the first pulse signal trigger action, second switch device and the 3rd switching device are with the second pulse signal trigger action, described first pulse signal is different with described second pulse, and at any time, in described first switching device and the second switch device at least one conducting is arranged.
Preferably, described rectification circuit is full-wave rectifying circuit, comprise: four diodes, wherein the negative electrode of the anode of first diode and the 3rd diode is connected to the end of the same name of the secondary of described isolating transformer together, and the negative electrode of the anode of second diode and the 4th diode is connected to the different name end of the secondary of described isolating transformer together;
The negative electrode of first diode links to each other with the negative electrode of second diode and as first output of described current feedback circuit;
The anode of the 3rd diode links to each other with the anode of the 4th diode and as second output of described current feedback circuit.
Preferably, described unipolarity full-bridge high-frequency inverter circuit comprises: four switching devices, wherein:
First end of first end of the 5th switching device and minion pass device is connected to first output of described current feedback circuit together;
Second end of second end of the 6th switching device and the 8th switch device is connected to second output of described current feedback circuit together;
Second end of the 5th switching device links to each other with first end of the 6th switching device as an output of described unipolarity full-bridge high-frequency inverter circuit, and second end that minion is closed device links to each other as another output of described unipolarity full-bridge high-frequency inverter circuit with first end of the 8th switch device.
Preferably, the preceding half period in a work period, the 5th switching device is with the high-frequency pulse signal trigger action, the 8th switch break-over of device, and minion closes device and the 6th switching device turn-offs; In the later half cycle in a work period, the 6th switching device is with the high-frequency pulse signal trigger action, and minion is closed break-over of device, and the 5th switching device and the 8th switch device turn-off.
Preferably, described high-frequency pulse signal is pwm pulse signal.
Preferably, a described back level inverter circuit also comprises:
Filter circuit is connected between two outputs of described unipolarity full-bridge high-frequency inverter circuit, is used for the high fdrequency component of the described unipolarity full-bridge high-frequency of filtering inverter circuit output signal.
Preferably, described filter circuit comprises: second inductance and the 3rd inductance, wherein, first end of second inductance connects first output of described unipolarity full-bridge high-frequency inverter circuit, first end of the 3rd inductance connects second output of described unipolarity full-bridge high-frequency inverter circuit, and second end of second inductance and second end of the 3rd inductance are connected to the two ends of AC load or electrical network.
Preferably, described filter circuit also comprises:
Second electric capacity is connected between second output of second output of described second inductance and described the 3rd inductance.
The inverter power supply device that the embodiment of the invention provides, adopt the two-stage topologies of prime full-bridge feed and back level full-bridge inverting, wherein level full bridge inverter in back adopts high frequency single-polarity PWM modulation, be not only applicable to the application scenario of little inverter, but also be applicable to the occasion of small-power band isolation applications.Prime adopts the current feed mode, for inverse-excitation type prime topological structure in the prior art, is more conducive to power expanding.And, switching device in the prime current feed topological structure does not need to consider the problem that leads directly to, need not dead band control, not only control is simpler, and owing to have the existence of the very high inductance of transient impedance, make switching device can realize the no-voltage turn-on and turn-off, reduced switching loss, improved whole efficiency.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use among the embodiment below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the present invention, for those of ordinary skills, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is little inverter topology schematic diagram in the prior art;
Fig. 2 is the voltage waveform at little inverter intermediate capacitance C1 shown in Figure 1 two ends;
Fig. 3 is the principle schematic of embodiment of the invention inverter power supply device
Fig. 4 is a kind of concrete topological structure schematic diagram of embodiment of the invention inverter power supply device;
Fig. 5 is drive waveforms and inductive current and the transformer original edge voltage current waveform schematic diagram of switching device S1 to S4 in the embodiment of the invention;
Fig. 6 be in the embodiment of the invention prime current feedback circuit at the current circuit schematic diagram of driving signal shown in Figure 5 during the following phase I;
Fig. 7 is prime current feedback circuit current circuit schematic diagram during second stage under driving signal shown in Figure 5 in the embodiment of the invention;
Fig. 8 be in the embodiment of the invention prime current feedback circuit at the current circuit schematic diagram of driving signal shown in Figure 5 during the following phase III;
Fig. 9 is prime current feedback circuit current circuit schematic diagram during the quadravalence section under driving signal shown in Figure 5 in the embodiment of the invention;
Figure 10 is the driving signal schematic representation of each switching device in the back level inverter circuit course of work in the embodiment of the invention;
Figure 11 is the current circuit schematic diagram of back level inverter circuit when line voltage positive half period pwm pulse triggering and conducting in the embodiment of the invention;
Figure 12 is the current circuit schematic diagram of back level inverter circuit when line voltage positive half period pwm pulse turn-offs in the embodiment of the invention;
Figure 13 is the current circuit schematic diagram of back level inverter circuit when line voltage negative half-cycle pwm pulse triggering and conducting in the embodiment of the invention;
Figure 14 is the current circuit schematic diagram of back level inverter circuit when line voltage negative half-cycle pwm pulse turn-offs in the embodiment of the invention.
Embodiment
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, below in conjunction with drawings and embodiments the embodiment of the invention is described in further detail.
As shown in Figure 3, be the principle schematic of embodiment of the invention inverter power supply device.
This inverter power supply device is used for converting the direct current of DC power supply 30 outputs to alternating current, comprises prime current feedback circuit 31 and back level inverter circuit 32.Wherein, described current feedback circuit 31 comprises: Chuan Jie half-bridge converter 311, isolating transformer 312 and rectification circuit 313 successively; Described back level inverter circuit 32 comprises: accumulator 321 and unipolarity full-bridge high-frequency inverter circuit 322.Wherein, accumulator 321 is connected between two outputs of described current feedback circuit 31, and described unipolarity full-bridge high-frequency inverter circuit 322 is used for the direct voltage of described current feedback circuit 31 outputs is converted to alternating voltage.
Need to prove, in inverter power supply device of the present invention, described back level inverter circuit 32 also can further comprise: filter circuit (not shown), be connected between two outputs of described unipolarity full-bridge high-frequency inverter circuit, be used for the high fdrequency component of the described unipolarity full-bridge high-frequency of filtering inverter circuit output signal.
Fig. 4 is a kind of concrete topological structure schematic diagram of embodiment of the invention inverter power supply device.
In this embodiment, the half-bridge converter in the current feedback circuit 31 comprises: first inductance L 1, the first switching device S1, second switch device S2, the 3rd switching device S3 and the 4th switching device S4.Wherein:
First end of first inductance L 1 connects the anode of described DC power supply 30, second end of first inductance L 1 connects first end of the first switching device S1 and first end of the 3rd switching device S3, and second end of second switch device S2 is connected the negative terminal of described DC power supply 30 with second end of the 4th switching device S4;
Second end of the first switching device S1 is connected to the end of the same name on the former limit of described isolating transformer T with first end of second switch device S2, and second end of the 3rd switching device S3 is connected to the different name end on the former limit of described isolating transformer T with first end of the 4th switching device S4.
In this embodiment, the rectification circuit in the 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 4th diode D4.Wherein:
The negative electrode of the anode of the first diode D1 and the 3rd diode D3 is connected to the end of the same name of the secondary of isolating transformer T together, and the negative electrode of the anode of the second diode D2 and the 4th diode D4 is connected to the different name end of the secondary of isolating transformer T together;
The negative electrode of the first diode D1 links to each other with the negative electrode of the second diode D2, and its tie point is as first output of described current feedback circuit 31;
The anode of the 3rd diode D3 links to each other with the anode of the 4th diode D4, and its tie point is as second output of described current feedback circuit 31.
In this embodiment, the accumulator in the back level inverter circuit 32 is specially first capacitor C 1.Unipolarity full-bridge high-frequency inverter circuit in the level inverter circuit 32 of back comprises: four switching devices as shown in Figure 4, are respectively the 5th switching device, the 6th switching device, minion pass device and the 8th switch device.
As shown in Figure 4, each switching device in the unipolarity full-bridge high-frequency inverter circuit comprises: switching tube and with the antiparallel diode of described switching tube.Described switching tube can be the semiconductor switch pipe, such as MOSFET (high voltage metal oxide silicon field effect transistor), IGBT (igbt), IGCT (integrated gate commutated thyristor), IEGT (strengthening the injection grid transistor) etc.Described diode can be the inverse parallel diode that separate diode or described switching tube inside carry.The drain electrode of described switching tube or collector electrode link to each other with the negative electrode of described diode and constitute first end of described switching device, and the source electrode of described switching tube or emitter link to each other with the anode of described diode and constitute second end of described switching device.Certainly, the embodiment of the invention does not limit the type of above-mentioned switching tube, can also be the switching tube of other type.
As shown in Figure 4, the 5th switching device is made up of the 5th switch transistor T 5 and the 5th diode VD5, the 6th switching device is made up of the 6th switch transistor T 6 and the 4th diode VD6, minion pass device is made up of the 7th switching tube T7 and the 7th diode VD7, and the 8th switch device is made up of the 8th switching tube T8 and the 8th diode VD8.
In this embodiment, first end of first end of the 5th switching device and minion pass device is connected to first output of described current feedback circuit together; Second end of second end of the 6th switching device and the 8th switch device is connected to second output of described current feedback circuit together; Second end of the 5th switching device links to each other with first end of the 6th switching device as an output of described unipolarity full-bridge high-frequency inverter circuit, and second end that minion is closed device links to each other as another output of described unipolarity full-bridge high-frequency inverter circuit with first end of the 8th switch device.
In Fig. 4, described filter circuit is specially LCL type topological structure, specifically comprise: second inductance L 2, the 3rd inductance L 3 and second capacitor C 2, wherein, first end of second inductance L 2 connects first output of described unipolarity full-bridge high-frequency inverter circuit, i.e. first end of second end of the 5th switching device and the 6th switching device; First end of the 3rd inductance L 3 connects second output of described unipolarity full-bridge high-frequency inverter circuit, and namely minion is closed second end of device and first end of the 8th switch device; Second end of second inductance L 2 and second end of the 3rd inductance L 3 are connected an end of second capacitor C 2 respectively.
Certainly, described filter circuit can also be topological structures such as L type, LC type.
Above-mentioned switching device S1 to S4, switch transistor T 5 to T8 can be MOSFET, and correspondingly, first end of above-mentioned switching device refers to that the D utmost point of MOSFET, second end refer to the S utmost point of MOSFET.
Above-mentioned switching device S1 to S4, switch transistor T 5 to T8 also can be IGBT, and correspondingly, first end of above-mentioned switching device refers to the collector electrode of IGBT, and second end refers to the emitter of IGBT.
Above-mentioned DC power supply 30 can be a generator, such as solar generator.
Operation principle below in conjunction with prime current feedback circuit in the embodiment of the invention inverter power supply device of Fig. 4 elaborates.
As shown in Figure 5, be drive waveforms and inductive current and the transformer original edge voltage current waveform schematic diagram of switching device S1 to S4.
As seen from Figure 5, the first switching device S1 and the 4th switching device S4 are with the first pulse signal trigger action, second switch device S2 and the 3rd switching device S3 are with the second pulse signal trigger action, described first pulse signal is different with described second pulse, and at any time, among the described first switching device S1 and the second switch device S2 at least one conducting is arranged.
When the first switching device S1, the 4th switching device S4 conducting simultaneously, when second switch device S2, the 3rd switching device S3 turn-off, the current i 1 of first inductance L 1 of flowing through through the former limit of transformer T, the first switching device S1, the 4th switching device S4 constitute the loop, the secondary of the first diode D1, the 4th diode D4 and transformer constitutes the loop simultaneously, is delivered to load end.
When second switch device S2, the 3rd switching device S3 conducting simultaneously, when the first switching device S1, the 4th switching device S4 turn-off, the current i 1 of first inductance L 1 of flowing through through the former limit of transformer T, second switch device S2, the 3rd switching device S3 constitute the loop, the secondary of the second diode D2, the 3rd diode D3 and transformer constitutes the loop simultaneously, is delivered to load end.
When switching device S1, S4, S2, S3 conducting simultaneously, first inductance L 1 directly is connected on DC power supply 30 two ends, and first inductance L 1 is in the energy storage state, current i 1 linear growth.This moment, transformer T former limit short circuit was not transmitted energy to secondary, and load end only depends on storage capacitor C1 discharge to keep.
The prime current feedback circuit work period is divided into four-stage in the embodiment of the invention, as shown in Figure 5, from t0, finishes to t4.Respectively this four-stage is elaborated below.
In the following description, represent described DC power supply 30 with PV.
Phase I t0-t1: at t0 constantly, second switch device S2, the 3rd switching device S3 turn-off.This stage first switching device S1 and the 4th switching device S4 are in conducting state, and second switch device S2 and the 3rd switching device S3 are in off state.Circuit Fault on Secondary Transformer, diode D1, D4 conducting, diode D2, D3 oppositely end.Energy is delivered to load by transformer, and gives first capacitor C 1 charging.
At the current circuit of phase I as shown in Figure 6, specific as follows:
Transformer primary side current loop: PV → L1 → S1 → T → S4 → PV;
Circuit Fault on Secondary Transformer current circuit: T → D1 → C1 and load → D4 → T.
Second stage t1-t2: at t1 constantly, second switch device S2, the 3rd switching device S3 conducting, switching device S1, S2, S3, S4 all are in conducting state at this moment; First inductance L 1 directly is connected on DC power supply PV two ends, current i 1 linear growth of first inductance L 1 of flowing through, and winding of transformer T is by second switch device S2, the 4th switching device S4 short circuit.Noenergy is to the secondary side transmission.Diode D1, D4, D2, D3 all oppositely end.Load-side is kept by 1 discharge of first capacitor C.
At the current circuit of second stage as shown in Figure 7, specific as follows:
Transformer primary side current loop: PV → L1 → S1 and S3 → S2 and S4 → PV;
Circuit Fault on Secondary Transformer current circuit: C1 → load → C1.
Phase III t2-t3: at t2 constantly, the first switching device S1, the 4th switching device S4 turn-off.This stage second switch device S2 and the 3rd switching device S3 are in conducting state, and the first switching device S1 and the 4th switching device S4 are in off state.Transformer T secondary side, the second diode D2, the 3rd diode D3 conducting, the first diode D1, the 4th diode D4 oppositely end.Energy is delivered to load by transformer T, and gives first capacitor C 1 charging.
At the current circuit of phase III as shown in Figure 8, specific as follows:
Transformer primary side current loop: PV → L1 → S3 → T → S2 → PV;
Circuit Fault on Secondary Transformer current circuit: T → D2 → C1 and load → D3 → T.
Quadravalence section t3-t4: at t3 constantly, the first switching device S1, the 4th switching device S4 conducting, switching device S1, S2, S3, S4 all are in conducting state at this moment; First inductance L 1 directly is connected on DC power supply PV two ends, current i 1 linear growth of first inductance L 1 of flowing through, and winding of transformer T is by second switch device S2, the 4th switching device S4 short circuit.Noenergy is to the secondary side transmission.Diode D1, D4, D2, D3 all oppositely end.Load-side is kept by 1 discharge of first capacitor C.
At the current circuit of quadravalence section as shown in Figure 9, specific as follows:
Transformer primary side current loop: PV → L1 → S1 and S3 → S2 and S4 → PV;
Circuit Fault on Secondary Transformer current circuit: C1 → load → C1.
Above-mentioned t0-t4 is a complete cycle, the four-stage before circuit state afterwards repeats.
Continue below to elaborate in conjunction with the operation principle of level inverter circuit in back in the embodiment of the invention inverter power supply device of Fig. 4.
In embodiments of the present invention, a work period of back level inverter circuit was made up of preceding half period and later half cycle, the corresponding course of work of inverter circuit in a work period is divided into two stages, is respectively the working stage that line voltage is the working stage of timing and line voltage when negative.
In the work period, a kind of drive signal waveform of each switching device as shown in figure 10 in the level inverter circuit of back.Wherein, S5, S6, S7 and S8 represent the driving signal of the 5th switching device, the 6th switching device, minion pass device and the 8th switch device respectively, and VAC represents the output signal of described back level inverter circuit.As shown in Figure 10, the 5th switching device and the 6th switching device respectively preceding half period and later half cycle with high-frequency PWM signal conduction or shutoff, half period keeps turn-offing in addition; Minion pass device and the 8th switch device are with power frequency conducting or shutoff.
(T represents a switch periods at phase I 0～T/2, it is the mains voltage signal cycle), be the working stage of timing corresponding to line voltage, the 5th switching device is with the high-frequency pulse signal trigger action, the driving signal of the 8th switch device keeps high level, be in conducting state, the driving signal that minion is closed device and the 6th switching device keeps low level, is in off state.
In this stage, when the 5th switching device and the 8th switch break-over of device, current circuit is: Vdc+ → S5 → L2 → AC → L3 → S8 → Vdc-, as shown in figure 11.
In this stage, when the shutoff of the 5th switching device, the 8th switch break-over of device, because the electric current in second inductance L 2 and the 3rd inductance L 3 can not suddenly change, therefore, the 6th diode VD6 conducting forms continuous current circuit: L2 → AC → L3 → S8 → VD6 → L2, as shown in figure 12.
At second stage T/2～T, working stage when being negative corresponding to line voltage, the 6th switching device is with the high-frequency pulse signal trigger action, the driving signal that minion is closed device keeps high level, be in conducting state, the driving signal of the 5th switching device and the 8th switch device keeps low level, is in off state.
In this stage, when the 6th switching device and minion pass break-over of device, current circuit is: Vdc+ → S7 → L3 → AC → L2 → S6 → Vdc-, as shown in figure 13.
In this stage, when the shutoff of the 6th switching device, when minion is closed break-over of device, because the electric current in second inductance L 2 and the 3rd inductance L 3 can not suddenly change, therefore, the 8th diode VD8 conducting forms continuous current circuit: L2 → S6 → VD8 → L3 → AC → L2, as shown in figure 14.
Need to prove, prime current feed road in the embodiment of the invention and back level inverter circuit can work alone, in other words, prime switching device S1 can independently control to the driving of switching device S4 and the driving of the switching device in the level inverter circuit of back, is independent of each other.
By the above-mentioned course of work as can be seen, the inverter power supply device that the embodiment of the invention provides, adopt the two-stage topologies of prime half-bridge feed and back level full-bridge inverting, wherein level full bridge inverter in back adopts high frequency single-polarity PWM modulation, be not only applicable to the application scenario of little inverter, but also be applicable to the occasion of small-power band isolation applications.Prime adopts the current feed mode, for inverse-excitation type prime topological structure in the prior art, is more conducive to power expanding.And, switching device in the prime current feed topological structure does not need to consider the problem that leads directly to, need not dead band control, not only control is simpler, and owing to have the existence of the very high inductance of transient impedance, make switching device can realize the no-voltage turn-on and turn-off, reduced switching loss, improved whole efficiency.In addition, by the electrical isolation of prime isolating transformer, solved the problem of leakage current well, need not to increase the leakage current absorption plant, be more conducive to raise the efficiency.
In addition, because prime current feedback circuit output constant DC, thereby can make back level inverter circuit carry out high-frequency inversion, realize idle adjusting.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for helping to understand equipment of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. inverter power supply device, be used for converting the direct current of DC power supply output to alternating current, it is characterized in that comprise prime current feedback circuit and back level inverter circuit, described current feedback circuit comprises: Chuan Jie full-bridge converter, isolating transformer and rectification circuit successively; Described back level inverter circuit comprises: accumulator and unipolarity full-bridge high-frequency inverter circuit, described accumulator is connected between two outputs of described current feedback circuit, and described unipolarity full-bridge high-frequency inverter circuit is used for the direct voltage of described current feedback circuit output is converted to alternating voltage.
2. inverter power supply device according to claim 1 is characterized in that, described full-bridge converter comprises: first inductance, first switching device, second switch device, the 3rd switching device and the 4th switching device;
First end of first inductance connects the anode of described DC power supply, second end of first inductance connects first end of first switching device and first end of the 3rd switching device, and second end of second switch device is connected the negative terminal of described DC power supply with second end of the 4th switching device;
Second end of first switching device is connected to the end of the same name on the former limit of described isolating transformer with first end of second switch device, and second end of the 3rd switching device is connected to the different name end on the former limit of described isolating transformer with first end of the 4th switching device.
3. inverter power supply device according to claim 2, it is characterized in that, described first switching device and the 4th switching device are with the first pulse signal trigger action, second switch device and the 3rd switching device are with the second pulse signal trigger action, described first pulse signal is different with described second pulse, and at any time, in described first switching device and the second switch device at least one conducting is arranged.
4. inverter power supply device according to claim 1, it is characterized in that, described rectification circuit is full-wave rectifying circuit, comprise: four diodes, wherein the negative electrode of the anode of first diode and the 3rd diode is connected to the end of the same name of the secondary of described isolating transformer together, and the negative electrode of the anode of second diode and the 4th diode is connected to the different name end of the secondary of described isolating transformer together;
The negative electrode of first diode links to each other with the negative electrode of second diode and as first output of described current feedback circuit;
The anode of the 3rd diode links to each other with the anode of the 4th diode and as second output of described current feedback circuit.
5. inverter power supply device according to claim 4 is characterized in that, described unipolarity full-bridge high-frequency inverter circuit comprises: four switching devices, wherein:
First end of first end of the 5th switching device and minion pass device is connected to first output of described current feedback circuit together;
Second end of second end of the 6th switching device and the 8th switch device is connected to second output of described current feedback circuit together;
Second end of the 5th switching device links to each other with first end of the 6th switching device as an output of described unipolarity full-bridge high-frequency inverter circuit, and second end that minion is closed device links to each other as another output of described unipolarity full-bridge high-frequency inverter circuit with first end of the 8th switch device.
6. inverter power supply device according to claim 5 is characterized in that, the preceding half period in a work period, the 5th switching device is with the high-frequency pulse signal trigger action, the 8th switch break-over of device, and minion closes device and the 6th switching device turn-offs; In the later half cycle in a work period, the 6th switching device is with the high-frequency pulse signal trigger action, and minion is closed break-over of device, and the 5th switching device and the 8th switch device turn-off.
7. inverter power supply device according to claim 6 is characterized in that, described high-frequency pulse signal is pwm pulse signal.
8. according to each described inverter power supply device of claim 1 to 7, it is characterized in that described back level inverter circuit also comprises:
Filter circuit is connected between two outputs of described unipolarity full-bridge high-frequency inverter circuit, is used for the high fdrequency component of the described unipolarity full-bridge high-frequency of filtering inverter circuit output signal.
9. inverter power supply device according to claim 8, it is characterized in that, described filter circuit comprises: second inductance and the 3rd inductance, wherein, first end of second inductance connects first output of described unipolarity full-bridge high-frequency inverter circuit, first end of the 3rd inductance connects second output of described unipolarity full-bridge high-frequency inverter circuit, and second end of second inductance and second end of the 3rd inductance are connected to the two ends of AC load or electrical network.
10. inverter power supply device according to claim 9 is characterized in that, described filter circuit also comprises:
Second electric capacity is connected between second output of second output of described second inductance and described the 3rd inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210035589XA CN103259438A (en) | 2012-02-16 | 2012-02-16 | Inverter power source device |
Applications Claiming Priority (1)
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| CN201210035589XA CN103259438A (en) | 2012-02-16 | 2012-02-16 | Inverter power source device |
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| CN1988310A (en) * | 2006-11-09 | 2007-06-27 | 上海大学 | Current source type photovoltiac parallel-in system and its control device and method |
| CN101166001A (en) * | 2006-10-16 | 2008-04-23 | 盈正豫顺电子股份有限公司 | Active bi-directional electric power adjuster |
| US20100008107A1 (en) * | 2008-07-09 | 2010-01-14 | Sma Solar Technology Ag | Dc/dc converter |
| CN201608660U (en) * | 2010-02-26 | 2010-10-13 | 韩新建 | High-frequency isolation grid-connected inverter |
| EP2400645A2 (en) * | 2010-06-24 | 2011-12-28 | KACO new energy GmbH | Indirect d.c. converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101166001A (en) * | 2006-10-16 | 2008-04-23 | 盈正豫顺电子股份有限公司 | Active bi-directional electric power adjuster |
| CN1988310A (en) * | 2006-11-09 | 2007-06-27 | 上海大学 | Current source type photovoltiac parallel-in system and its control device and method |
| US20100008107A1 (en) * | 2008-07-09 | 2010-01-14 | Sma Solar Technology Ag | Dc/dc converter |
| CN201608660U (en) * | 2010-02-26 | 2010-10-13 | 韩新建 | High-frequency isolation grid-connected inverter |
| EP2400645A2 (en) * | 2010-06-24 | 2011-12-28 | KACO new energy GmbH | Indirect d.c. converter |
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