CN204131423U - Four level dual Buck inverters - Google Patents
Four level dual Buck inverters Download PDFInfo
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- CN204131423U CN204131423U CN201420340245.4U CN201420340245U CN204131423U CN 204131423 U CN204131423 U CN 204131423U CN 201420340245 U CN201420340245 U CN 201420340245U CN 204131423 U CN204131423 U CN 204131423U
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- Prior art keywords
- power
- switch pipe
- power switch
- diode
- input power
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Abstract
The utility model provides a kind of four level dual Buck inverters, comprise the first input power, second input power, 3rd input power, 4th input power, one Buck circuit, 2nd Buck circuit, output filter capacitor and load, the first output inductor is provided with in a described Buck circuit, the second output inductor is provided with in described 2nd Buck circuit, first output inductor is connected with load one end with output filter capacitor one end, and be connected with the second output inductor, the other end of output filter capacitor is connected to ground after being connected with the other end of load.Its tool has the following advantages: (1) output harmonic wave content is little, and capacity and the volume of filter reduce greatly, and efficiency is high; (2) voltage stress of power device is low, is applicable to high pressure, jumbo occasion; (3) without bridge arm direct pass, recover without body diode reverse; (4) power switch pipe utilance is high, reduces circuit complexity.
Description
Technical field
The utility model relates to the inverter in a kind of electrical energy changer, particularly a kind of four level dual Buck inverters
.
Background technology
In recent years, along with the development of generation of electricity by new energy, intelligent grid etc., multi-level converter technology obtains increasing concern, multi-level converter tool has the following advantages: the level before (1) filtering is many level staircase waveform, harmonic content is little, be conducive to the design of filter, reduce volume and the capacity of filter; (2) occasion of high-voltage large-capacity is applicable to; (3) compared to traditional two level converters, the voltage stress of its device is little, and conversion efficiency is high.Current, multi-level converter mainly comprises diode neutral-point-clamped type, striding capacitance type, cascade connection type three kinds.Diode neutral-point-clamped type and the device needed for striding capacitance type can be many, the problem of circuit structure more complicated, and there is the unbalanced problem of DC voltage in it, though there is not voltage-sharing in cascade connection type converter, but what its each module almost adopted is all H-bridge circuit, there is the hidden trouble of bridge arm direct pass, need to add dead zone function, cause voltage deformity.Dual buck inverter is that it has without bridge arm direct pass, without outstanding features such as body diode reverse recoveries in recent years by the novel inverter of large quantity research topology, and under it is operated in current half pattern, aspergillus ficuum generation.For retaining the advantage of multilevel converter, solve the subproblem that conventional art exists, the utility model introduces multilevel converter on dual-buck circuit structure, proposes the two buck inverter of four level.
Summary of the invention
The shortcoming of prior art in view of the above, the purpose of this utility model be to provide a kind of can retain the advantage of multilevel converter while also can overcome four level dual Buck inverters of traditional multi-level technology part weak point.
For achieving the above object and other relevant objects, the utility model provides a kind of four level dual Buck inverters, comprise the first input power, second input power, 3rd input power, 4th input power, one Buck circuit, 2nd Buck circuit, output filter capacitor and load, the first output inductor is provided with in a described Buck circuit, the second output inductor is provided with in described 2nd Buck circuit, first output inductor is connected with load one end with output filter capacitor one end, and be connected with the second output inductor, the other end of output filter capacitor is connected to ground after being connected with the other end of load.
Preferably, a described Buck circuit also comprises the first power diode, second power diode, 4th power diode, first power switch pipe, second power switch pipe, 3rd power switch pipe, described 2nd Buck circuit also comprises the 3rd power diode, 5th power diode, 6th power diode, 4th power switch pipe, 5th power switch pipe, 6th power switch pipe, the minus earth of the second input power, the anode of the second input power is connected with the negative electrode of the first input power, be connected to the anode of the first power diode, the anode of the first input power is connected with the drain electrode of the first power switch pipe, the negative electrode of the first power diode is connected with the negative electrode of the 5th power diode, be connected to the source electrode of the first power switch pipe, the source electrode of the first power switch pipe is connected with the drain electrode of the second power switch pipe, the source electrode of the second power switch pipe is connected with the drain electrode of the 3rd power switch pipe, be connected to the negative electrode of the second power diode, the negative electrode of the second power diode is connected with one end of the first output inductor, the other end of the first output inductor is connected with load one end with output filter capacitor one end, be connected to one end of the second output inductor, the other end of output filter capacitor is connected with the other end of load, be connected to ground, the other end of the second output inductor is connected with the drain electrode of the 5th power switch pipe, be connected to the source electrode of the 4th power switch pipe, the source electrode of the 4th power switch pipe is connected with the anode of the 5th power diode, the drain electrode of the 4th power switch pipe is connected with the anode of the 6th power diode, the negative electrode of the 6th power diode is connected with the anode of the first power diode, the source electrode of the 5th power switch pipe is connected with the drain electrode of the 6th power switch pipe, be connected to the anode of the second power diode, the anode of the 3rd power diode is connected with the anode of the second power diode, the negative electrode of the 3rd power diode is connected with the anode of the 4th power diode, be connected to the negative electrode of the 3rd input power, the negative electrode of the 4th power diode is connected with the source electrode of the 3rd power switch pipe, the negative electrode of the 3rd input power is connected with the anode of the 4th input power, the negative electrode of the 4th input power is connected with the source electrode of the 6th power switch pipe, the anode of the 3rd input power is connected to the ground.
As mentioned above, four level dual Buck inverters of the present utility model have following beneficial effect: (1) output harmonic wave content is little, and capacity and the volume of filter reduce greatly, and efficiency is high; (2) voltage stress of power device is low, is applicable to high pressure, jumbo occasion; (3) without bridge arm direct pass, recover without body diode reverse; (4) power switch pipe utilance is high, reduces circuit complexity.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment.
Mode schematic diagram when Fig. 2 a is the utility model embodiment operation mode 1.
Mode schematic diagram when Fig. 2 b is the utility model embodiment operation mode 2.
Mode schematic diagram when Fig. 2 c is the utility model embodiment operation mode 3.
Mode schematic diagram when Fig. 2 d is the utility model embodiment operation mode 4.
Mode schematic diagram when Fig. 2 e is the utility model embodiment operation mode 5.
Mode schematic diagram when Fig. 2 f is the utility model embodiment operation mode 6.
Mode schematic diagram when Fig. 2 g is the utility model embodiment operation mode 7.
Mode schematic diagram when Fig. 2 h is the utility model embodiment operation mode 8.
Designation in figure:
s 1~
s 6---the first ~ six power switch pipe;
d 1~
d 6---the first ~ six power diode;
l 1, l 2---the first output inductor, the second output inductor;
c---output filter capacitor; E1
~e4---the first ~ four input power;
u o---inverter output voltage;
i o---inverter output current;
i 1---buck circuit 1 output current;
i 2---buck circuit 2 output current;
r---load.
Embodiment
Below by way of specific instantiation, execution mode of the present utility model is described, those skilled in the art the content disclosed by this specification can understand other advantages of the present utility model and effect easily.The utility model can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present utility model.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present utility model in a schematic way, then only the assembly relevant with the utility model is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
The utility model provides a kind of four level dual Buck inverters, it comprises the first input power E1, the second input power E2, the 3rd input power E3, the 4th input power E4, a Buck circuit A, the 2nd Buck circuit B, output filter capacitor C and load R, in a Buck circuit A, be provided with the first output inductor L
1, in the 2nd Buck circuit B, be provided with the second output inductor L
2, the first output inductor L
1be connected with load R one end with output filter capacitor C one end, and with the second output inductor L
2connect, after the other end of output filter capacitor C is connected with the other end of load R, be connected to ground.
As a kind of concrete execution mode, as shown in Figure 1, the minus earth of the second input power E2 of this four level dual Buck inverter, the anode of the second input power E2 is connected with the negative electrode of the first input power E1, is connected to the first power diode
d 1anode, the anode of the first input power E1 and the first power switch pipe
s 1drain electrode connect, the first power diode
d 1negative electrode and the 5th power diode
d 5negative electrode be connected, be connected to the first power switch pipe
s 1source electrode, the first power switch pipe
s 1source electrode and the second power switch pipe
s 2drain electrode be connected, the second power switch pipe
s 2source electrode and the 3rd power switch pipe
s 3drain electrode be connected, be connected to the second power diode
d 2negative electrode, the second power diode
d 2negative electrode and the first output inductor
l 1one end connect, the first output inductor
l 1the other end and output filter capacitor
cone end and load
rone end is connected, and is connected to the second output inductor
l 2one end, output filter capacitor
cthe other end and load
rthe other end be connected, be connected to ground, the second output inductor
l 2the other end and the 5th power switch pipe
s 5drain electrode be connected, be connected to the 4th power switch pipe
s 4source electrode, the 4th power switch pipe
s 4source electrode and the 5th power diode
d 5anode be connected, the 4th power switch pipe
s 4drain electrode and the 6th power diode
d 6anode be connected, the 6th power diode
d 6negative electrode and the first power diode
d 1anode be connected, the 5th power switch pipe
s 5source electrode and the 6th power switch pipe
s 6drain electrode be connected, be connected to the second power diode
d 2anode, the 3rd power diode
d 3anode and the second power diode
d 2anode be connected, the 3rd power diode
d 3negative electrode and the 4th power diode
d 4anode be connected, be connected to the negative electrode of the 3rd input power E3, the 4th power diode
d 4negative electrode and the 3rd power switch pipe
s 3source electrode be connected, the negative electrode of the 3rd input power E3 is connected with the anode of the 4th input power E4, the negative electrode of the 4th input power E4 and the 6th power switch pipe
s 6source electrode be connected, the anode of the 3rd input power E3 is connected to the ground.
Eight operation intervals are divided into during the work of this four level dual Buck inverter:
Operation mode 1: as shown in Figure 2 a, the first power switch pipe
s 1with the second power switch pipe
s 2open-minded, electric current through the first input power E1, the second input power E2, the first power switch pipe
s 1, the second power switch pipe
s 2, the first output inductor
l 1, to output filter capacitor
cand load
r.
Operation mode 2: as shown in Figure 2 b, the second power switch pipe
s 2open-minded, electric current through the first defeated second input power E2, the first power diode
d 1, the second power switch pipe
s 2, the first output inductor
l 1, to output filter capacitor
cand load
r.
Operation mode 3: as shown in Figure 2 c, the 3rd power switch pipe
s 3open-minded, electric current through the 3rd input power E3, the 4th power diode
d 4, the 3rd power switch pipe
s 3, the first output inductor
l 1, to output filter capacitor
cand load
r.
Operation mode 4: as shown in Figure 2 d, the 6th power switch pipe
s 6open-minded, electric current through the 3rd input power E3, the 4th input power E4, the 6th power switch pipe
s 6, the second power diode
d 2, the first output inductor
l 1, to output filter capacitor
cand load
r.
Operation mode 5: the five power switch pipe
s 5with the 6th power switch pipe
s 6open-minded, electric current is through output filter capacitor
cand load
r, the second output inductor
l 1, the 5th power switch pipe
s 5, the 6th power switch pipe
s 6, the 4th input power E4, to the 3rd input power E3.
Operation mode 6: the five power switch pipe
s 5open-minded, electric current is through output filter capacitor
cand load
r, the second output inductor
l 1, the 5th power switch pipe
s 5, the 3rd power diode
d 3, to the 3rd input power E3.
Operation mode 7: the four power switch pipe
s 4open-minded, electric current is through output filter capacitor
cand load
r, the second output inductor
l 1, the 4th power switch pipe
s 4, the 6th power diode
d 6, to the second input power E2.
Operation mode 8: the first power switch pipe
s 1open-minded, electric current is through output filter capacitor
cand load
r, the second output inductor
l 1, the 5th power diode
d 5, the first power switch pipe
s 1, the first input power E1, to the second input power E2.
As seen from the above description, the utility model is that a kind of improvement on dual buck inverter basis obtains, and this inverter tool has the following advantages after tested: 1) output harmonic wave content is little, and capacity and the volume of filter reduce greatly, and efficiency is high; 2) voltage stress of power device is low, is applicable to high pressure, jumbo occasion; 3) without bridge arm direct pass, recover without body diode reverse, (4) power switch pipe utilance is high, reduces circuit complexity.So the utility model effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (2)
1. a level dual Buck inverter, comprise the first input power (E1), the second input power (E2), the 3rd input power (E3), the 4th input power (E4), a Buck circuit (A), the 2nd Buck circuit (B), output filter capacitor (C) and load (R), in a described Buck circuit (A), be provided with the first output inductor (L
1), be provided with the second output inductor (L in described 2nd Buck circuit (B)
2), it is characterized in that: the first output inductor (L
1) be connected with load R one end with output filter capacitor (C) one end, and with the second output inductor L
2connect, after the other end of output filter capacitor C is connected with the other end of load R, be connected to ground.
2. four level dual Buck inverters according to claim 1, is characterized in that: a described Buck circuit (A) also comprises the first power diode (D
1), the second power diode (D
2), the 4th power diode (D
4), the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), described 2nd Buck circuit (B) also comprises the 3rd power diode (D
3), the 5th power diode (D
5), the 6th power diode (D
6), the 4th power switch pipe (S
4), the 5th power switch pipe (S
5), the 6th power switch pipe (S
6), the minus earth of the second input power (E2), the anode of the second input power (E2) is connected with the negative electrode of the first input power (E1), is connected to the first power diode (D
1) anode, the anode of the first input power (E1) and the first power switch pipe (S
1) drain electrode connect, the first power diode (D
1) negative electrode and the 5th power diode (D
5) negative electrode be connected, be connected to the first power switch pipe (S
1) source electrode, the first power switch pipe (S
1) source electrode and the second power switch pipe (S
2) drain electrode be connected, the second power switch pipe (S
2) source electrode and the 3rd power switch pipe (S
3) drain electrode be connected, be connected to the second power diode (D
2) negative electrode, the second power diode (D
2) negative electrode and the first output inductor (L
1) one end connect, the first output inductor (L
1) the other end be connected with load (R) one end with output filter capacitor (C) one end, be connected to the second output inductor (L
2) one end, the other end of output filter capacitor (C) is connected with the other end of load (R), be connected to ground, the second output inductor (L
2) the other end and the 5th power switch pipe (S
5) drain electrode be connected, be connected to the 4th power switch pipe (S
4) source electrode, the 4th power switch pipe (S
4) source electrode and the 5th power diode (D
5) anode be connected, the 4th power switch pipe (S
4) drain electrode and the 6th power diode (D
6) anode be connected, the 6th power diode (D
6) negative electrode and the first power diode (D
1) anode be connected, the 5th power switch pipe (S
5) source electrode and the 6th power switch pipe (S
6) drain electrode be connected, be connected to the second power diode (D
2) anode, the 3rd power diode (D
3) anode and the second power diode (D
2) anode be connected, the 3rd power diode (D
3) negative electrode and the 4th power diode (D
4) anode be connected, be connected to the negative electrode of the 3rd input power (E3), the 4th power diode (D
4) negative electrode and the 3rd power switch pipe (S
3) source electrode be connected, the negative electrode of the 3rd input power (E3) is connected with the anode of the 4th input power (E4), the negative electrode of the 4th input power (E4) and the 6th power switch pipe (S
6) source electrode be connected, the anode of the 3rd input power (E3) is connected to the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340245.4U CN204131423U (en) | 2014-06-24 | 2014-06-24 | Four level dual Buck inverters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420340245.4U CN204131423U (en) | 2014-06-24 | 2014-06-24 | Four level dual Buck inverters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204131423U true CN204131423U (en) | 2015-01-28 |
Family
ID=52387740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420340245.4U Expired - Fee Related CN204131423U (en) | 2014-06-24 | 2014-06-24 | Four level dual Buck inverters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204131423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022664A (en) * | 2014-06-24 | 2014-09-03 | 苏州弘鹏新能源有限公司 | Four-level double-Buck inverter |
-
2014
- 2014-06-24 CN CN201420340245.4U patent/CN204131423U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022664A (en) * | 2014-06-24 | 2014-09-03 | 苏州弘鹏新能源有限公司 | Four-level double-Buck inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20180624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |