CN109067226A - Five lever boosting type inverters of one kind and its control method - Google Patents
Five lever boosting type inverters of one kind and its control method Download PDFInfo
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- CN109067226A CN109067226A CN201811209932.1A CN201811209932A CN109067226A CN 109067226 A CN109067226 A CN 109067226A CN 201811209932 A CN201811209932 A CN 201811209932A CN 109067226 A CN109067226 A CN 109067226A
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- switching tube
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Classifications
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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
Abstract
A kind of five lever boostings type inverter provided by the invention and its control method, the inverter include: first switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor, third capacitor, first diode, the second diode and inductance；Inverter structure provided by the invention is simple, and switching tube is reduced to six by traditional eight, reduces circuit structure complexity and circuit cost.Further, for the device in inverter provided by the invention in the case where bearing identical voltage stress, if exporting the alternating voltage of same amplitude, the requirement of DC power supply is reduced to the half of conventional topologies, reduces the requirement to DC power supply.
Description
Technical field
The present invention relates to power electronics fields, more particularly to a kind of five lever boosting type inverters and its controlling party
Method.
Background technique
Inverter, which is mainly realized, is converted to alternating current for direct current, is mainly used in solar battery, battery to exchange
The occasion of load supplying.Five-electrical level inverter output phase voltage contains five level, and output harmonic wave is small, waits fields grid-connected
It is widely used.
Conventional known five-electrical level inverter topological structure mainly includes five level (neutral of diode clamp type
Point clamped, NPC), five level of striding capacitance clamping type (flying capacitor, FC) structure and H bridge cascade connection type
(cascaded H-Bridge, CHB) etc..
The above three classes inverter will realize that five level export, it usually needs 8 switching devices (IGBT) lead to its circuit knot
Structure is complicated, and volume is larger, therefore it provides a kind of novel five-electrical level inverter becomes those skilled in the art's technology urgently to be resolved
Problem.
Summary of the invention
The embodiment of the invention provides a kind of five lever boosting type inverters and its control methods, and circuit structure is simple,
Cost is relatively low.
According to an aspect of the present invention, a kind of five lever boosting type inverters are provided, comprising: first switch tube, second
Switching tube, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor, third electricity
Appearance, first diode, the second diode and inductance；
The anode of the anode connection DC power supply of the first diode, the first end of the first capacitor connect direct current
The second end of the anode in source, the first capacitor connects first node；
The first end of second capacitor connects the first node, and the second end of second capacitor connects DC power supply
Negative terminal；
The first end of the first switch tube connects second node, and the second end of the first switch tube connects third section
Point；
The first end of 4th switching tube connects fourth node, the second end connection described second of the 4th switching tube
Node；
The first end of the second switch connects the 5th node, and the second end of the second switch connects the third
Node；
The first end of the third switching tube connects the fourth node, described in the second end connection of the third switching tube
5th node；
The cathode of the first diode connects the second end of the 5th switching tube, the first end of the 5th switching tube
Connect the second end of the second switch；
The negative terminal of the first end connection DC power supply of 6th switching tube, the second end of the 6th switching tube connect institute
The cathode of the second diode is stated, the anode of second diode connects the first end of the third switching tube；
First node ground connection, the first node are connect with the second node, the third node and described the
The third capacitor is connected between four nodes, the 5th node is voltage output point, and connects by inductance and load；
Wherein, the first switch tube, the second switch, the third switching tube and the 4th switching tube connect
There is anti-paralleled diode.
Preferably, the first switch tube, the second switch, the third switching tube, the 4th switching tube, institute
Stating the 5th switching tube and the 6th switching tube is IGBT or MOSFET.
Preferably, the first diode and second diode are two poles of silicon carbide diode or fast recovery
Pipe.
According to another aspect of the present invention, a kind of control method of five lever boosting type inverters is provided, be applied to such as with
The upper five lever boosting type inverters, comprising:
When in operating mode, for the moment, control second switch, the 5th switching tube and the conducting of the 6th switching tube control first
Switching tube, third switching tube and the 4th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to directly
0. 5 times of the voltage in galvanic electricity source；
When being in operating mode two, first switch tube and second switch conducting are controlled, third switching tube, the 4th are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to zero；
When being in operating mode three, second switch and the conducting of the 4th switching tube are controlled, first switch tube, third are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to directly
The voltage in galvanic electricity source；
When being in operating mode four, control third switching tube, the 5th switching tube and the conducting of the 6th switching tube, control first
Switching tube, second switch and the 4th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to directly
Five times of the negative zero point of the voltage in galvanic electricity source；
When being in operating mode five, first switch tube and the conducting of third switching tube are controlled, second switch, the 4th are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to directly
The negative value of the voltage in galvanic electricity source.
Preferably, the control method of a kind of five lever boostings type inverter provided by the invention further include:
When being in operating mode six, third switching tube and the conducting of the 4th switching tube are controlled, first switch tube, second are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to zero.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
A kind of five lever boostings type inverter and its control method, the inverter provided by the invention include: first switch
Pipe, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor,
Third capacitor, first diode, the second diode and inductance；Inverter structure provided by the invention is simple, and switching tube is by tradition
Eight be reduced to six, reduce circuit structure complexity and circuit cost.Further, inverter provided by the invention
In device in the case where bearing identical voltage stress, if exporting the alternating voltage of same amplitude, the requirement of DC power supply is reduced to
The half of conventional topologies reduces the requirement to DC power supply.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of one embodiment of five lever boostings type inverter provided by the invention；
Fig. 2 is that a kind of five lever boostings type inverter provided by the invention is in operating mode schematic diagram for the moment；
Fig. 3 is schematic diagram when a kind of five lever boostings type inverter provided by the invention is in operating mode two；
Fig. 4 is schematic diagram when a kind of five lever boostings type inverter provided by the invention is in operating mode three；
Fig. 5 is schematic diagram when a kind of five lever boostings type inverter provided by the invention is in operating mode four；
Fig. 6 is schematic diagram when a kind of five lever boostings type inverter provided by the invention is in operating mode five；
Fig. 7 is schematic diagram when a kind of five lever boostings type inverter provided by the invention is in operating mode six；
Fig. 8 is a kind of output phase V diagram of five lever boostings type inverter provided by the invention；
Fig. 9 is the structural schematic diagram of three-phase five-level inverter topological structure；
Figure 10 is the output voltage schematic diagram of three-phase five-level inverter topological structure.
Specific embodiment
The embodiment of the invention provides a kind of five lever boosting type inverters and its control methods, and circuit structure is simple,
Cost is relatively low.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, a kind of one embodiment of five lever boostings type inverter provided by the invention, comprising: first opens
Close pipe T1, second switch T2, third switch transistor T 3, the 4th switch transistor T 4, the 5th switch transistor T 5, the 6th switch transistor T 6, first
Capacitor C1, the second capacitor C2, third capacitor C0, first diode D1, the second diode D2 and inductance Lx；
The anode of the anode connection DC power supply of first diode D1, the first end connection DC power supply of first capacitor C1
The second end of anode, first capacitor C1 connects first node；
The first end of second capacitor C2 connects first node, the negative terminal of the second end connection DC power supply of the second capacitor C2；
The first end of first switch tube T1 connects second node, and the second end of first switch tube T1 connects third node；
The first end of 4th switch transistor T 4 connects fourth node, and the second end of the 4th switch transistor T 4 connects second node；
The first end of second switch T2 connects the 5th node, and the second end of second switch T2 connects third node；
The first end of third switch transistor T 3 connects fourth node, and the second end of third switch transistor T 3 connects the 5th node；
The cathode of first diode D1 connects the second end of the 5th switch transistor T 5, the first end connection of the 5th switch transistor T 5 the
The second end of two switch transistor Ts 2；
The negative terminal of the first end connection DC power supply of 6th switch transistor T 6, the second end connection the two or two of the 6th switch transistor T 6
The cathode of pole pipe D2, the first end of the anode connection third switch transistor T 3 of the second diode D2；
First node ground connection, first node are connect with second node, are connected with third between third node and fourth node
Capacitor C0, the 5th node are voltage output point, and are connected by inductance Lx and load；
Wherein, first switch tube T1, second switch T2, third switch transistor T 3 and the 4th switch transistor T 4 are connected to inverse parallel
Diode.
Further, first switch tube T1, second switch T2, third switch transistor T 3, the 4th switch transistor T the 4, the 5th are opened
It closes pipe T5 and the 6th switch transistor T 6 is IGBT or MOSFET.
Further, first diode D1 and the second diode D2 is two poles of silicon carbide diode or fast recovery
Pipe.
A kind of operating mode of five lever boostings type inverter provided by the invention will be specifically described, is needed below
Illustrate, for Fig. 2 into Fig. 7, a line indicates capacitor C0 charging current path, and b line indicates watt current path, and c line indicates idle
Current path:
Operating mode one: as shown in Fig. 2, trigger switch pipe T2, T5, T6 are connected, keeping T1, T4, T3 switching tube to disconnect, this
When DC power supply charged by D1-T5-C0-D2-T6 to capacitor C0, after charging complete capacitance voltage be Vdc, active power
It is then transported in AC system by D1-T5-T2-Lx, the anti-paralleled diode of T4 provides reactive current path, at this time inverter
Output X point to 0 level point be Uxo=0.5Vdc.
Operating mode two: as shown in figure 3, triggering T1, T2 two switching tubes conducting, remaining four switch transistor T 4, T3, T5,
T6 is held off, and X point is identical as 0 current potential (IGBT is considered as perfect switch) at this time, so the output level of inverter is
Uxo=0.
Operating mode three: as shown in figure 4, triggering T2, T4 two switching tubes conducting, remaining four switch transistor T 1, T3, T5,
T6 is held off, and watt current is transmitted by T4-C0-T2-Lx at this time, and inverter output capacitance C0 exists under this mode
The charging of mode A keeps voltage Vdc, i.e. the output level of inverter is Uxo=Vdc.
Operating mode four: as shown in figure 5, triggering T3, T5, T6, keep T1, T2, T4 in an off state, at this time direct current
Source carries out floating charge to capacitor C0 by D1-T5-C0-D2-T6, and holding capacitor voltage is Vdc, and the output level of inverter is at this time
Uxo=-0.5Vdc.
Operating mode five: as shown in fig. 6, triggering T3, T1 conducting, remaining four switch transistor Ts 2, T4, T5, T6 are held off
State, this mode are similar to mode C, and inverter output level is Uxo=-Vdc at this time.
Operating mode six: as shown in fig. 7, triggering T3, T4 conducting, remaining four switch transistor Ts 1, T2, T5, T6 are held off
State, this mode are similar to operating mode two, and the output level of inverter is Uxo=0 at this time.
By the bad switching that follows of above six kinds of circuit operation modes, circuit realizes the output of five level, as shown in Figure 8.
A kind of five lever boostings type inverter provided by the invention is illustrated with a concrete application scene below:
Five level three-phase connection structure of novel six pipe in the present invention is as shown in figure 9, three-phase circuit topology is mainly used in
Three-phase inversion occasion.Three general DC busbar capacitor C1 and C2 when being connected, each circuitry phase of A, B, C three-phase is with reference to Fig. 1 (in Fig. 9
Dash area A phase, B phase, C phase circuit is identical).Three-phase circuit follows bad switching, inverter output line electricity according to aforementioned mode
It presses Uab waveform as shown in Figure 10, is one or nine level voltage staircase waveforms.
The present invention uses six switching tubes, five electricity proposed by the present invention compared with the five level topology such as well known NPC, FC, CHB
Flat inverter, active switching devices (IGBT or MOSFET etc.) quantity are reduced to 6 by 8, and circuit cost and complexity decline.
The present invention exports the alternating voltage of same amplitude, DC bus-bar voltage in the case where device bears identical voltage stress
Requirement be reduced to the half of conventional topologies (NPC FC CHB), reduce the requirement to DC bus-bar voltage.It (uses in other words
Identical DC bus-bar voltage, the increasing of inverter output voltage amplitude are twice).
All only there are two switch device conductives under majority mode of the invention, and T5 and T6 works under low frequency on-off mode,
The conduction loss of system reduces, and efficiency increases compared with conventional topologies.
Be above the structure and connection relationship of a kind of five lever boostings type inverter provided by the invention are carried out it is detailed
Illustrate, the control method of one kind provided by the invention five lever boostings type inverter as described above will be said below
Bright, one embodiment of this method includes:
When in operating mode, for the moment, control second switch, the 5th switching tube and the conducting of the 6th switching tube control first
Switching tube, third switching tube and the 4th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to direct current
0. 5 times of the voltage in source；
When being in operating mode two, first switch tube and second switch conducting are controlled, third switching tube, the 4th are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to zero；
When being in operating mode three, second switch and the conducting of the 4th switching tube are controlled, first switch tube, third are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to direct current
The voltage in source；
When being in operating mode four, control third switching tube, the 5th switching tube and the conducting of the 6th switching tube, control first
Switching tube, second switch and the 4th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to direct current
Five times of the negative zero point of the voltage in source；
When being in operating mode five, first switch tube and the conducting of third switching tube are controlled, second switch, the 4th are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to direct current
The negative value of the voltage in source.
Optionally, the control method of a kind of five lever boostings type inverter provided by the invention further include:
When being in operating mode six, third switching tube and the conducting of the 4th switching tube are controlled, first switch tube, second are controlled
Switching tube, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of five lever boosting type inverters is equal to zero.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of five lever boosting type inverters characterized by comprising first switch tube, second switch, third switch
Pipe, the 4th switching tube, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor, third capacitor, first diode,
Two diodes and inductance；
The anode of the anode connection DC power supply of the first diode, the first end connection DC power supply of the first capacitor
The second end of anode, the first capacitor connects first node；
The first end of second capacitor connects the first node, and the second end connection DC power supply of second capacitor is born
End；
The first end of the first switch tube connects second node, and the second end of the first switch tube connects third node；
The first end of 4th switching tube connects fourth node, and the second end of the 4th switching tube connects second section
Point；
The first end of the second switch connects the 5th node, and the second end of the second switch connects the third section
Point；
The first end of the third switching tube connects the fourth node, the second end connection the described 5th of the third switching tube
Node；
The cathode of the first diode connects the second end of the 5th switching tube, the first end connection of the 5th switching tube
The second end of the second switch；
The negative terminal of the first end connection DC power supply of 6th switching tube, the second end connection described the of the 6th switching tube
The cathode of two diodes, the anode of second diode connect the first end of the third switching tube；
First node ground connection, the first node are connect with the second node, the third node and described Section four
The third capacitor is connected between point, the 5th node is voltage output point, and connects by inductance and load；
Wherein, the first switch tube, the second switch, the third switching tube and the 4th switching tube are connected to instead
Parallel diode.
2. five lever boostings type inverter according to claim 1, which is characterized in that the first switch tube, described
Two switching tubes, the third switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube are IGBT
Or MOSFET.
3. five lever boostings type inverter according to claim 1, which is characterized in that the first diode and described
Two diodes are silicon carbide diode or fast recovery diode.
4. a kind of control method of five lever boosting type inverters, applied to five electricity as described in claims 1 to 3 any one
Flat booster type inverter characterized by comprising
When in operating mode, for the moment, control second switch, the 5th switching tube and the conducting of the 6th switching tube control first switch
Pipe, third switching tube and the 4th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to direct current
0. 5 times of the voltage in source；
When being in operating mode two, first switch tube and second switch conducting, control third switching tube, the 4th switch are controlled
Pipe, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to zero；
When being in operating mode three, second switch and the conducting of the 4th switching tube, control first switch tube, third switch are controlled
Pipe, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to direct current
The voltage in source；
When being in operating mode four, control third switching tube, the 5th switching tube and the conducting of the 6th switching tube control first switch
Pipe, second switch and the 4th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to direct current
Five times of the negative zero point of the voltage in source；
When being in operating mode five, first switch tube and the conducting of third switching tube, control second switch, the 4th switch are controlled
Pipe, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to direct current
The negative value of the voltage in source.
5. the control method of five lever boostings type inverter according to claim 4, which is characterized in that further include:
When being in operating mode six, third switching tube and the conducting of the 4th switching tube are controlled, first switch tube, second switch are controlled
Pipe, the 5th switching tube and the 6th switching tube disconnect, so that the output voltage of the five lever boostings type inverter is equal to zero.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209932.1A CN109067226A (en) | 2018-10-17 | 2018-10-17 | Five lever boosting type inverters of one kind and its control method |
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| CN201811209932.1A CN109067226A (en) | 2018-10-17 | 2018-10-17 | Five lever boosting type inverters of one kind and its control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110880864A (en) * | 2019-12-13 | 2020-03-13 | 三峡大学 | Single-phase five-level power factor correction circuit based on hybrid H bridge |
| CN111030441A (en) * | 2019-12-13 | 2020-04-17 | 三峡大学 | Single-phase power factor correction circuit based on three-tube five-level topology |
| CN111030440A (en) * | 2019-12-13 | 2020-04-17 | 三峡大学 | Single-phase two-tube five-level rectifier based on hybrid H bridge |
| CN111082680A (en) * | 2019-12-13 | 2020-04-28 | 三峡大学 | Single-phase five-level rectifier based on T-shaped structure |
| CN113258804A (en) * | 2021-05-19 | 2021-08-13 | 山东大学 | Five-level photovoltaic inverter capable of reducing number of switching tubes and modulation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110880864A (en) * | 2019-12-13 | 2020-03-13 | 三峡大学 | Single-phase five-level power factor correction circuit based on hybrid H bridge |
| CN111030441A (en) * | 2019-12-13 | 2020-04-17 | 三峡大学 | Single-phase power factor correction circuit based on three-tube five-level topology |
| CN111030440A (en) * | 2019-12-13 | 2020-04-17 | 三峡大学 | Single-phase two-tube five-level rectifier based on hybrid H bridge |
| CN111082680A (en) * | 2019-12-13 | 2020-04-28 | 三峡大学 | Single-phase five-level rectifier based on T-shaped structure |
| CN111082680B (en) * | 2019-12-13 | 2021-05-04 | 三峡大学 | Single-phase five-level rectifier based on T-shaped structure |
| CN111030441B (en) * | 2019-12-13 | 2021-06-04 | 三峡大学 | Single-phase power factor correction circuit based on three-tube five-level topology |
| CN110880864B (en) * | 2019-12-13 | 2021-07-06 | 三峡大学 | Single-phase five-level power factor correction circuit based on hybrid H bridge |
| CN113258804A (en) * | 2021-05-19 | 2021-08-13 | 山东大学 | Five-level photovoltaic inverter capable of reducing number of switching tubes and modulation method thereof |
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