CN102904471B - Inverter and power supply equipment - Google Patents
Inverter and power supply equipment Download PDFInfo
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- CN102904471B CN102904471B CN201210374373.6A CN201210374373A CN102904471B CN 102904471 B CN102904471 B CN 102904471B CN 201210374373 A CN201210374373 A CN 201210374373A CN 102904471 B CN102904471 B CN 102904471B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
Abstract
The embodiment of the invention discloses an inverter. A switching tube circuit is added on the basis of an existing inverter, and the switching tube circuit is opened and closed in advance in comparison with a power tube, so that the switching loss of the power tube in the inverter is reduced.
Description
Technical field
The present invention relates to a kind of electronic circuit field, particularly relate to a kind of inverter and power supply unit.
Background technology
Inverter is a kind of circuit direct current being become interchange, as multi-electrical level inverter.Because multi-electrical level inverter has a series of advantages such as the switching frequency that power output is large, devices switch frequency is low, inverter is equivalent is high, output harmonic wave is little, rapid dynamic response speed, Electro Magnetic Compatibility are good, receive increasing concern, and obtain investigation and application widely.
The basic thought of multi-electrical level inverter be on the basis of certain main circuit topological structure by different switch combinations, obtain multistage staircase waveform and export equivalent sine wave.And five-electrical level inverter, namely refer to that obtaining Pyatyi staircase waveform exports.
Existing five level inverse conversion systems have polytype, and be illustrated in figure 1 wherein a kind of, it comprises boosting (Boost) circuit and five level topological structures.Wherein Boost circuit promotes VD; And five level topological structures are converted to alternating voltage DC voltage, be then supplied to load or electrical network.
But the power switch pipe of existing five-electrical level inverter is generally operational in voltage and/or the higher state of electric current, larger to the on-state loss (or claiming switching loss) of power device, as, also will be comparatively large to the loss of power tube, limit the raising of system effectiveness to a certain extent.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, provides a kind of inverter.The switching loss of power tube in inverter can be reduced.
In order to solve the problems of the technologies described above, on the one hand, embodiments provide a kind of inverter, comprise: dc source, booster circuit, hybrid five-level topological structure, described booster circuit is connected in parallel on dc source the two poles of the earth, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure exports alternating current, described booster circuit comprises symmetrical two bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 and diode D3, D4, D5, D6,
D3, Q5, Q6 and D4 of connecting successively is connected at the two poles of the earth of described dc source;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after Q1, Q5, Q6 and Q2 connect successively, after Q3, Q7, Q8, Q4 connect successively, be connected in parallel on the negative pole of D1 and the positive pole of D4;
Tie point between Q3 and Q7 connects diode D5, the plus earth of D5;
Tie point between Q4 and Q8 connects diode D6, the plus earth of D6.
On the other hand, the embodiment of the present invention additionally provides a kind of inverter, comprise: dc source, booster circuit, hybrid five-level topological structure, described booster circuit is connected in parallel on dc source the two poles of the earth, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure exports alternating current, described booster circuit comprises symmetrical two bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 and diode D3, D4, D5, D6,
D3, Q5, Q6 and D4 of connecting successively is connected at the two poles of the earth of described dc source;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after Q1, Q5, Q6 and Q2 connect successively, be connected in parallel on the positive pole of D3 and the negative pole of D4 after Q3, Q7, Q8, Q4 connect successively or be connected in parallel on the negative pole of D1 and the negative pole of D4;
Tie point between Q3 and Q7 connects diode D5, the plus earth of D5;
Tie point between Q4 and Q8 connects diode D6, the plus earth of D6.
Further, in above-mentioned inverter, also can comprising control unit, for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, making
When voltage is higher, booster circuit does not work, the input voltage of dc source is through Q1, D5 and Q7 afterflow branch road in series, and Q3 and Q7 connects, and described inverter circuit forms three-level topology structure; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q2, turn off in advance;
When voltage is lower, booster circuit works, input voltage one tunnel of dc source is input to Q5, and another road is input to Q1, D5 and Q7 afterflow branch road in series after booster circuit boosting, and Q3 and Q7 connects, and described inverter circuit forms five level topological structures; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q6, turn off in advance.
Wherein, Q3, Q4 are metal-oxide half field effect transistor, and Q1, Q2, Q5, Q6, Q7, Q8 are insulated gate bipolar transistor.
Further, described inverter also comprises:
Power relay RL1, RL1 are connected in parallel on bypass diode D1;
Power relay RL2, RL2 are connected in parallel on bypass diode D2;
Described control unit is also for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, and make when the higher booster circuit of voltage does not work, the input voltage of dc source is input to Q1 through RL1, is input to RL2 through Q2; When the lower booster circuit work of voltage, input voltage one tunnel of dc source is input to Q5 through D3, is input to D4 through Q6, and another road is input to Q1 by RL1 after booster circuit boosting, is input to RL2 through Q2.
Further, described inverter also comprises:
Power relay RL3, RL3 are connected in parallel on described diode D3;
Power relay RL4, RL4 are connected in parallel on described diode D4;
Described control unit is also for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, and make when the higher booster circuit of voltage does not work, the input voltage of dc source is input to Q1 through RL1, is input to RL2 through Q2; When the lower booster circuit work of voltage, input voltage one tunnel of dc source is input to Q5 through RL3, outputs to RL4 through Q6, and another road is input to Q1 by RL1 after booster circuit boosting, is input to RL2 through Q2.
Again on the one hand, the embodiment of the present invention additionally provides a kind of power supply unit, comprise the DC power supply apparatus providing direct current to export, described direct current is exported the inverter being converted to and exchanging and export, and the described load exchanging output and drive, described inverter comprises: booster circuit, hybrid five-level topological structure, the two poles of the earth that the direct current that described booster circuit is connected in parallel on described DC power supply apparatus exports, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure connects described load, described booster circuit comprises symmetrical two bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 and diode D3, D4, D5, D6,
D3, Q5, Q6 and D4 of connecting successively is connected at the two poles of the earth that described direct current exports;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after Q1, Q5, Q6 and Q2 connect successively, after Q3, Q7, Q8, Q4 connect successively, be connected in parallel on the negative pole of D1 and the positive pole of D4;
Tie point between Q3 and Q7 connects diode D5, the plus earth of D5;
Tie point between Q4 and Q8 connects diode D6, the plus earth of D6.
In power supply unit in another embodiment of the invention, not be connected in parallel on the negative pole of D1 and the positive pole of D4 after described Q3, Q7, Q8, Q4 connect successively, but be connected in parallel on the positive pole of D3 and the negative pole of D4 or be connected in parallel on the negative pole of D1 and the negative pole of D4.
Further, described inverter also comprises control unit, for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, makes
When voltage is higher, booster circuit does not work, the voltage that described direct current exports is through Q1, D5 and Q7 afterflow branch road in series, and Q3 and Q7 connects, and described inverter circuit forms three-level topology structure; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q2, turn off in advance;
When voltage is lower, booster circuit works, voltage one tunnel that described direct current exports is input to Q5, and another road is input to Q1, D5 and Q7 afterflow branch road in series after booster circuit boosting, and Q3 and Q7 connects, and described inverter circuit forms five level topological structures; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q6, turn off in advance.
Concrete, Q3, Q4 are metal-oxide half field effect transistor, and Q1, Q2, Q5, Q6, Q7, Q8 are insulated gate bipolar transistor.
In embodiments of the present invention, owing to adding switching tube circuit Q3, Q4, when inverter works, the switching loss on Q1 and Q6 can transfer to Q3 and Q4 branch road, reduces the loss of power tube Q1 and Q6.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the one of existing five-electrical level inverter specifically forms schematic diagram;
Fig. 2 is that of inverter in the embodiment of the present invention specifically forms schematic diagram;
Fig. 3 is that second of inverter in the embodiment of the present invention specifically forms schematic diagram;
Fig. 4 is that the 3rd of inverter in the embodiment of the present invention specifically forms schematic diagram;
Fig. 5 is that the embodiment of the present invention comprises of the inverter of two relays and specifically forms schematic diagram;
Fig. 6 is that the embodiment of the present invention comprises of the inverter of four relays and specifically forms schematic diagram;
Fig. 7 is that the embodiment of the present invention comprises second of the inverter of four relays and specifically forms schematic diagram;
Fig. 8 is that the embodiment of the present invention comprises the 3rd of the inverter of four relays and specifically forms schematic diagram;
Fig. 9 is that of power supply unit in the embodiment of the present invention specifically forms schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In embodiments of the present invention, by the basis of five-electrical level inverter, increase switching tube circuit, the switching loss of main power tube is transferred on the switching tube circuit of increase, the loss of main power tube can be reduced.And, main power tube uses high-power insulated gate bipolar transistor (Insulated Gate BipolarTransistor, IGBT), and the switching tube circuit increased can use the better power tube of switching speed, as metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET), like this while reduction main power tube switching loss, also significantly cost can not be increased.
Simultaneously, by suitably arranging diode and power relay, when input voltage varies in size, the inverter in the embodiment of the present invention can also be changed between three-level inverter and five-electrical level inverter, and the switching tube circuit namely increased can participate in formation five level block.Because the loss of five-electrical level inverter is lower than three-level inverter, when being operated in five level block, the switching loss of power tube can be reduced further.Q in following embodiment and accompanying drawing thereof represents switching tube circuit, one end connection control signal, and in addition in the place in circuit of two ends, it is according to the control conducting of control signal or cut-off; In following circuit diagram, unsettled one end of Q represents connection control signal, does not mark in diagram.The concrete composition of this control signal, according in embodiment to the description of circuit function, should be appreciated that to those skilled in the art and not repeat herein.
As shown in Figure 2, for one of the inverter in the embodiment of the present invention specifically forms schematic diagram.This inverter comprises: dc source, booster circuit, hybrid five-level topological structure, described booster circuit is connected in parallel on dc source the two poles of the earth, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure exports alternating current, described booster circuit comprises symmetrical two bypass diode D1 and D2, and described hybrid five-level topological structure comprises switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 and diode D3, D4, D5, D6.
D3, Q5, Q6 and D4 of connecting successively is connected at the two poles of the earth of described dc source; Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after Q1, Q5, Q6 and Q2 connect successively, after Q3, Q7, Q8, Q4 connect successively, be connected in parallel on the negative pole of D1 and the positive pole of D4; Tie point between Q3 and Q7 connects diode D5, the plus earth of D5; Tie point between Q4 and Q8 connects diode D6, the plus earth of D6.
Further, above-mentioned inverter also can comprise a control unit, for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, make: when when voltage is higher, booster circuit does not work, the input voltage of dc source is through Q1, D5 and Q7 afterflow branch road in series, Q3 and Q7 connects, and described inverter circuit forms three-level topology structure; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q2, turn off in advance; When voltage is lower, booster circuit works, input voltage one tunnel of dc source is input to Q5, and another road is input to Q1, D5 and Q7 afterflow branch road in series after booster circuit boosting, and Q3 and Q7 connects, and described inverter circuit forms five level topological structures; And control Q3 opens in advance than Q1, turns off in advance, Q4 opens in advance than Q6, turn off in advance.
Wherein, Q3, Q4 can be MOSFET, and Q1, Q2, Q5, Q6, Q7, Q8 are IGBT.Because the switching speed of power MOSFET is faster, the switching loss of main power tube therefore can be reduced further.In following each embodiment, Q3, Q4 also can be power MOSFET, follow-uply repeat no longer one by one.In Fig. 2 ~ Fig. 8 all with Q3, Q4 for power MOSFET, other switching tubes are then for IGBT is that example is illustrated.
Certainly, the concrete composition of booster circuit in embodiments of the present invention can also adopt other forms provided in prior art, herein only exemplarily, and should in this, as the restriction to the specific embodiment of the invention.
As shown in Figure 3, for second of the inverter in the embodiment of the present invention specifically forms schematic diagram.Can find out, the circuit in the embodiment of the present invention and the difference of the circuit shown in Fig. 1 are only, are connected in parallel on the positive pole of D3 and the negative pole of D4 after Q3, Q7, Q8, Q4 connect successively.
As shown in Figure 4, for the 3rd of the inverter in the embodiment of the present invention specifically forms schematic diagram.Can find out, the circuit in the embodiment of the present invention and the difference of the circuit shown in Fig. 1 are only, are connected in parallel on the negative pole of D1 and the negative pole of D4 after Q3, Q7, Q8, Q4 connect successively.
As shown in Figure 5, on the basis of Fig. 2, this inverter also can comprise: power relay RL1, RL1 are connected in parallel on bypass diode D1; Power relay RL2, RL2 are connected in parallel on bypass diode D2.In this circuit arrangement, control unit is also for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, make when the higher booster circuit of voltage does not work, the input voltage of dc source is input to Q1 through RL1, is input to RL2 through Q2; When the lower booster circuit work of voltage, input voltage one tunnel of dc source is input to Q5 through D3, is input to D4 through Q6, and another road is input to Q1 by RL1 after booster circuit boosting, is input to RL2 through Q2.
As shown in Figure 6, on the basis of Fig. 5, this inverter also can comprise: power relay RL3, RL3 are connected in parallel on the diode D3 of described first brachium pontis; Power relay RL4, RL4 are connected in parallel on the diode D4 of described first brachium pontis.In this circuit arrangement, control unit is also for controlling the switch of described switching tube circuit Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, make when the higher booster circuit of voltage does not work, the input voltage of dc source is input to Q1 through RL1, is input to RL2 through Q2; When the lower booster circuit work of voltage, input voltage one tunnel of dc source is input to Q5 through RL3, outputs to RL4 through Q6, and another road is input to Q1 by RL1 after booster circuit boosting, is input to RL2 through Q2.
On the basis of Fig. 3, inverter in embodiments of the present invention also can comprise: power relay RL1, RL1 are connected in parallel on bypass diode D1; Power relay RL2, RL2 are connected in parallel on bypass diode D2.And can comprise further: power relay RL3, RL3 are connected in parallel on the diode D3 of described first brachium pontis; Power relay RL4, RL4 are connected in parallel on the diode D4 of described first brachium pontis.Its control circuit working condition can with reference to the description relevant with Fig. 5 and Fig. 6.As shown in Figure 7, be the situation that four relays include.
On the basis of Fig. 4, inverter in embodiments of the present invention also can comprise: power relay RL1, RL1 are connected in parallel on bypass diode D1; Power relay RL2, RL2 are connected in parallel on bypass diode D2.And can comprise further: power relay RL3, RL3 are connected in parallel on the diode D3 of described first brachium pontis; Power relay RL4, RL4 are connected in parallel on the diode D4 of described first brachium pontis.Its control circuit working condition can with reference to the description relevant with Fig. 5 and Fig. 6.As shown in Figure 8, be the situation that four relays include.
Namely, in the circuit of Fig. 6 ~ 8 example, when input voltage is higher, boosting (Boost) circuit does not work, and input positive voltage is input to Q1 through RL1, and Q1 and Q5 forms complete I font circuit, diode D5 and Q7 afterflow branch road in series, Q3 and Q7 series connection simultaneously, due to the Q5 normal open when the sine of AC power output voltage positive half cycle, thus on circuit form, Q3 and Q7 and Q1 forms form in parallel.Now, the hybrid five-level topological structure of inverter is operated in three-level structure state.Control the opening of power switch pipe by control unit, turn off sequential, Q3 is opened in advance than Q1, turns off in advance, thus the switching loss of Q1 is transferred to Q3 branch road.In addition on the one hand, Q1, Q5 generally use high-power IGBT, and Q3 then uses switching speed power MOQFET faster, and therefore this circuit can the switching loss of larger reduction power tube.
When input voltage is lower, booster circuit is started working, positive voltage one tunnel of input connects through overpower relay RL3 and Q5, another road is connected by RL1 and Q1 after booster circuit boosting, diode and Q7 afterflow branch road in series, Q3 and Q7 series connection simultaneously, circuit form forms form in parallel with Q1, Q5.Now, the hybrid five-level topological structure of inverter is operated in five level block states.Control the opening of power switch pipe by control unit, turn off sequential, Q3 is opened in advance than Q1, turns off in advance, thus the switching loss of larger reduction power tube Q1.
It should be noted that, the situation of the input positive voltage of foregoing description; Situation during input negative voltage is comparatively similar to above principle, does not repeat herein.
Known by foregoing description, in embodiments of the present invention, owing to adding bypass diode D1, D2 and switching tube circuit Q3, Q4, when inverter works, switching loss on Q1 and Q6 can transfer to Q3 and Q4 branch road, reduces the loss of power tube Q1 and Q6.
As shown in Figure 9, for one of the power supply unit in the embodiment of the present invention specifically forms schematic diagram.This power supply unit 1, comprises the DC power supply apparatus 10 providing direct current to export, and described direct current is exported the inverter 12 being converted to and exchanging and export, and the described load 14 exchanging output and drive.According to the difference of the embody rule of power supply unit, above-mentioned DC power supply apparatus and load can have different selections, and e.g., DC power supply apparatus is the battery providing dc source etc., does not do repeating one by one herein.Above-mentioned inverter can be in aforementioned inverter embodiment any one, herein not to the composition of inverter again row repeat.
Known by foregoing description, the inverter circuit structure in the embodiment of the present invention, in conjunction with the control of control unit, makes the hybrid five-level structure of inverter under different voltage status change between three level and five level.Because the loss of five-electrical level inverter is lower than three-level inverter, this switching can reduce the switching loss of power tube further.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (14)
1. an inverter, it is characterized in that, described inverter comprises: dc source, booster circuit, hybrid five-level topological structure, described booster circuit is connected in parallel on described dc source the two poles of the earth, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure exports alternating current, described booster circuit comprises two symmetrical bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, switching tube circuit Q2, switching tube circuit Q3, switching tube circuit Q4, switching tube circuit Q5, switching tube circuit Q6, switching tube circuit Q7, switching tube circuit Q8 and diode D3, diode D4, diode D5, diode D6,
Wherein, connect successively with described diode D3, described switching tube circuit Q5, described switching tube circuit Q6 and described diode D4 in the two poles of the earth of described dc source;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after described switching tube circuit Q1, described switching tube circuit Q5, described switching tube circuit Q6 and described switching tube circuit Q2 connect successively, described switching tube circuit Q3, described switching tube circuit Q7, described switching tube circuit Q8, described switching tube circuit Q4 are connected in parallel between the negative pole of described bypass diode D1 and the positive pole of described diode D4 after connecting successively;
Tie point between described switching tube circuit Q3 with described switching tube circuit Q7 is connected the negative pole of described diode D5, the plus earth of described diode D5;
Tie point between described switching tube circuit Q4 with described switching tube circuit Q8 is connected the negative pole of described diode D6, the plus earth of described diode D6;
When described inverter circuit forms three-level topology structure, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q2, turns off in advance;
When described inverter circuit forms five level topological structures, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q6, turns off in advance.
2. inverter as claimed in claim 1, it is characterized in that, described inverter also comprises control unit, for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make
When the higher and described booster circuit of voltage does not work, the input voltage of described dc source is through described switching tube circuit Q1, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms three-level topology structure;
When the lower and described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5, another road is input to described switching tube circuit Q1 after described booster circuit boosting, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms five level topological structures.
3. inverter as claimed in claim 1 or 2, it is characterized in that, described switching tube circuit Q3, described switching tube circuit Q4 are metal-oxide half field effect transistor, and described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8 are insulated gate bipolar transistor.
4. inverter as claimed in claim 2, it is characterized in that, described inverter also comprises:
Power relay RL1, described power relay RL1 are connected in parallel on described bypass diode D1;
Power relay RL2, described power relay RL2 are connected in parallel on described bypass diode D2;
Described control unit is also for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make when the higher described booster circuit of voltage does not work, the input voltage of described dc source is input to described switching tube circuit Q1 through described power relay RL1, is input to described power relay RL2 through described switching tube circuit Q2; When the lower described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5 through described diode D3, described diode D4 is input to through described switching tube circuit Q6, another road is input to described switching tube circuit Q1 by described power relay RL1 after described booster circuit boosting, is input to described power relay RL2 through described switching tube circuit Q2.
5. inverter as claimed in claim 4, it is characterized in that, described inverter also comprises:
Power relay RL3, described power relay RL3 are connected in parallel on described diode D3;
Power relay RL4, described power relay RL4 are connected in parallel on described diode D4;
Described control unit is also for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make when the higher described booster circuit of voltage does not work, the input voltage of described dc source is input to described switching tube circuit Q1 through described power relay RL1, is input to described power relay RL2 through described switching tube circuit Q2; When the lower described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5 through described power relay RL3, described power relay RL4 is outputted to through described switching tube circuit Q6, another road is input to described switching tube circuit Q1 by described power relay RL1 after described booster circuit boosting, is input to described power relay RL2 through described switching tube circuit Q2.
6. an inverter, it is characterized in that, described inverter comprises: dc source, booster circuit, hybrid five-level topological structure, described booster circuit is connected in parallel on described dc source the two poles of the earth, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure exports alternating current, described booster circuit comprises two symmetrical bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, switching tube circuit Q2, switching tube circuit Q3, switching tube circuit Q4, switching tube circuit Q5, switching tube circuit Q6, switching tube circuit Q7, switching tube circuit Q8 and diode D3, diode D4, diode D5, diode D6,
Wherein, connect successively with described diode D3, described switching tube circuit Q5, described switching tube circuit Q6 and described diode D4 in the two poles of the earth of described dc source;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after described switching tube circuit Q1, described switching tube circuit Q5, described switching tube circuit Q6 and described switching tube circuit Q2 connect successively, described switching tube circuit Q3, described switching tube circuit Q7, described switching tube circuit Q8, described switching tube circuit Q4 are connected in parallel between the positive pole of described diode D3 and the negative pole of described diode D4 after connecting successively or are connected in parallel between the negative pole of described bypass diode D1 and the negative pole of described diode D4;
Tie point between described switching tube circuit Q3 with described switching tube circuit Q7 is connected the negative pole of described diode D5, the plus earth of described diode D5;
Tie point between described switching tube circuit Q4 with described switching tube circuit Q8 is connected the negative pole of described diode D6, the plus earth of described diode D6;
When described inverter circuit forms three-level topology structure, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q2, turns off in advance;
When described inverter circuit forms five level topological structures, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q6, turns off in advance.
7. inverter as claimed in claim 6, it is characterized in that, described inverter also comprises control unit, for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make
When the higher and described booster circuit of voltage does not work, the input voltage of described dc source is through described switching tube circuit Q1, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms three-level topology structure;
When the lower and described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5, another road is input to described switching tube circuit Q1 after described booster circuit boosting, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms five level topological structures.
8. inverter as claimed in claims 6 or 7, it is characterized in that, described switching tube circuit Q3, described switching tube circuit Q4 are metal-oxide half field effect transistor, and described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8 are insulated gate bipolar transistor.
9. inverter as claimed in claim 7, it is characterized in that, described inverter also comprises:
Power relay RL1, described power relay RL1 are connected in parallel on described bypass diode D1;
Power relay RL2, described power relay RL2 are connected in parallel on described bypass diode D2;
Described control unit is also for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make when the higher described booster circuit of voltage does not work, the input voltage of described dc source is input to described switching tube circuit Q1 through described power relay RL1, is input to described power relay RL2 through described switching tube circuit Q2; When the lower described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5 through described diode D3, described diode D4 is input to through described switching tube circuit Q6, another road is input to described switching tube circuit Q1 by described power relay RL1 after described booster circuit boosting, is input to described power relay RL2 through described switching tube circuit Q2.
10. inverter as claimed in claim 9, it is characterized in that, described inverter also comprises:
Power relay RL3, described power relay RL3 are connected in parallel on described diode D3;
Power relay RL4, described power relay RL4 are connected in parallel on described diode D4;
Described control unit is also for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make when the higher described booster circuit of voltage does not work, the input voltage of described dc source is input to described switching tube circuit Q1 through overpower relay RL1, is input to described power relay RL2 through described switching tube circuit Q2; When the lower described booster circuit work of voltage, input voltage one tunnel of described dc source is input to described switching tube circuit Q5 through described power relay RL3, described power relay RL4 is outputted to through described switching tube circuit Q6, another road is input to described switching tube circuit Q1 by described power relay RL1 after described booster circuit boosting, is input to described power relay RL2 through described switching tube circuit Q2.
11. 1 kinds of power supply units, comprise the DC power supply apparatus providing direct current to export, and described direct current are exported the inverter being converted to and exchanging and export, and the described load exchanging output and drive, and it is characterized in that,
Described inverter comprises: booster circuit, hybrid five-level topological structure, the two poles of the earth that the direct current that described booster circuit is connected in parallel on described DC power supply apparatus exports, described hybrid five-level topological structure is connected in parallel on two outputs of described booster circuit, the output of described hybrid five-level topological structure connects described load, described booster circuit comprises two symmetrical bypass diode D1 and D2, described hybrid five-level topological structure comprises switching tube circuit Q1, switching tube circuit Q2, switching tube circuit Q3, switching tube circuit Q4, switching tube circuit Q5, switching tube circuit Q6, switching tube circuit Q7, switching tube circuit Q8 and diode D3, diode D4, diode D5, diode D6,
Wherein, connect successively with described diode D3, described switching tube circuit Q5, described switching tube circuit Q6 and described diode D4 in the two poles of the earth that described direct current exports;
Form two outputs that the first brachium pontis is connected in parallel on described booster circuit after described switching tube circuit Q1, described switching tube circuit Q5, described switching tube circuit Q6 and described switching tube circuit Q2 connect successively, described switching tube circuit Q3, described switching tube circuit Q7, described switching tube circuit Q8, described switching tube circuit Q4 are connected in parallel between the negative pole of described bypass diode D1 and the positive pole of described diode D4 after connecting successively;
Tie point between described switching tube circuit Q3 with described switching tube circuit Q7 is connected the negative pole of described diode D5, the plus earth of described diode D5;
Tie point between described switching tube circuit Q4 with described switching tube circuit Q8 is connected the negative pole of described diode D6, the plus earth of described diode D6;
When described inverter circuit forms three-level topology structure, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q2, turns off in advance;
When described inverter circuit forms five level topological structures, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q6, turns off in advance.
12. power supply units as claimed in claim 11, it is characterized in that, described switching tube circuit Q3, described switching tube circuit Q7, described switching tube circuit Q8, described switching tube circuit Q4 are not be connected in parallel between the negative pole of described bypass diode D1 and the positive pole of described diode D4 after connecting successively, but are connected in parallel between the positive pole of described diode D3 and the negative pole of described diode D4 or are connected in parallel between the negative pole of described bypass diode D1 and the negative pole of described diode D4;
When described inverter circuit forms three-level topology structure, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q2, turns off in advance;
When described inverter circuit forms five level topological structures, control described switching tube circuit Q3 and open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q6, turns off in advance.
13. power supply units as described in claim 11 or 12, it is characterized in that, described inverter also comprises control unit, for controlling the switch of described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q3, described switching tube circuit Q4, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8, make
When the higher and described booster circuit of voltage does not work, the voltage that described direct current exports is through described switching tube circuit Q1, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms three-level topology structure; And control described switching tube circuit Q3 to open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q2, turns off in advance;
When the lower and described booster circuit work of voltage, voltage one tunnel that described direct current exports is input to Q5, another road is input to described switching tube circuit Q1 after described booster circuit boosting, described diode D5 and described switching tube circuit Q7 afterflow branch road in series, described switching tube circuit Q3 connects with described switching tube circuit Q7, and described inverter circuit forms five level topological structures; And control described switching tube circuit Q3 to open in advance than described switching tube circuit Q1, turn off in advance, described switching tube circuit Q4 opens in advance than described switching tube circuit Q6, turns off in advance.
14. power supply units as claimed in claim 13, it is characterized in that, described switching tube circuit Q3, described switching tube circuit Q4 are metal-oxide half field effect transistor, and described switching tube circuit Q1, described switching tube circuit Q2, described switching tube circuit Q5, described switching tube circuit Q6, described switching tube circuit Q7, described switching tube circuit Q8 are insulated gate bipolar transistor.
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| US9413268B2 (en) | 2012-05-10 | 2016-08-09 | Futurewei Technologies, Inc. | Multilevel inverter device and method |
| CN103023363B (en) * | 2012-11-26 | 2015-04-08 | 华为技术有限公司 | Five-level inverter |
| CN103354427B (en) * | 2013-06-24 | 2015-07-08 | 华为技术有限公司 | Single-phase inverter and three-phase inverter |
| CN103475249B (en) * | 2013-09-11 | 2016-08-17 | 华为技术有限公司 | A kind of multi-electrical level inverter |
| US9190934B2 (en) * | 2014-03-06 | 2015-11-17 | Futurewei Technologies, Inc. | Multilevel hybrid inverter and operating method |
| US9385628B2 (en) * | 2014-03-17 | 2016-07-05 | Futurewei Technologies, Inc. | Multilevel inverter device and operating method |
| CN104038088B (en) * | 2014-06-30 | 2017-02-15 | 阳光电源股份有限公司 | Method and device for controlling photovoltaic inverter circuit |
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