CN208571949U - A kind of one-phase five-level inverter - Google Patents
A kind of one-phase five-level inverter Download PDFInfo
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- CN208571949U CN208571949U CN201821465018.9U CN201821465018U CN208571949U CN 208571949 U CN208571949 U CN 208571949U CN 201821465018 U CN201821465018 U CN 201821465018U CN 208571949 U CN208571949 U CN 208571949U
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- switching tube
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- phase
- level inverter
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Abstract
The utility model embodiment discloses a kind of one-phase five-level inverter, which includes: first switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, first capacitor, the second capacitor and diode；Inverter structure provided by the utility model is simple, and the requirement of DC voltage amplitude is lower, and can smaller output common mode interference noise without isolating transformer.If the inverter is connect with power grid realizes grid-connected operating mode, the negative terminal of DC side is connected with power grid midpoint, common-mode noise can be eliminated, exchange outlet side voltage can reach four times of DC voltage.
Description
Technical field
The utility model relates to power electronics field more particularly to a kind of one-phase five-level inverters.
Background technique
Single-phase inverter is chiefly used in single phase ac load supplying, it can also be used to the application of new energy or energy storage grid-connected system
Occasion.Generally for common-mode noise is inhibited, needs to increase isolating transformer link in the circuit of inverter, not only increase and set
Standby weight, and increase equipment cost.
Utility model content
The utility model discloses a kind of one-phase five-level inverter, the requirement of DC voltage amplitude is lower, and is not necessarily to
Isolating transformer can smaller output common mode interference noise.
The utility model provides a kind of one-phase five-level inverter, comprising: first switch tube, second switch, third
Switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, first capacitor, the second electricity
Appearance and diode；
The anode of the anode connection DC power supply of the diode, the cathode of the diode connect the first switch tube
First end, the second end of the first switch tube connects first node；
The first end of the second switch is connect with the first end of the third switching tube, and the of the second switch
Two ends connect second node, the negative terminal of the second end connection DC power supply of the third switching tube；
The first end of 4th switching tube connects the first node, and the second end of the 4th switching tube connects third
Node；
The first end of 5th switching tube connects the third node, the second end connection the 4th of the 5th switching tube
Node；
The first end of the first capacitor connects the first node, the second end connection the described 4th of the first capacitor
Node；
The first end of second capacitor connects the third node, and the second end of second capacitor connects Section five
Point；
The first end of 6th switching tube connects the fourth node, described in the second end connection of the 6th switching tube
5th node；
The first end of 7th switching tube connects the second node, described in the second end connection of the 7th switching tube
5th node；
The second end of 8th switching tube connects the 5th node, and the first end of the 8th switching tube is the list
The negative voltage output end of phase five-electrical level inverter, the second node are that the positive voltage of the one-phase five-level inverter exports
End, the second end of the third switching tube are connected with the first end of the 8th switching tube.
Preferably, a kind of one-phase five-level inverter provided by the utility model further include: inductance；
The second node connects the first end of the inductance, and the second end of the inductance is single-phase five level inverse conversion
The positive voltage output end of device.
Preferably, the first switch tube, the second switch, the third switching tube, the 4th switching tube, institute
Stating the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube is IGBT or MOSFET.
Preferably, the diode is silicon carbide diode or fast recovery diode.It can from above technical scheme
Out, the utility model embodiment has the advantage that
The utility model provides a kind of one-phase five-level inverter, which includes: first switch tube, second switch
Pipe, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the first electricity
Appearance, the second capacitor and diode；Inverter structure provided by the utility model is simple, and the requirement of DC voltage amplitude is lower, and
It can smaller output common mode interference noise without isolating transformer.If the inverter is connect with power grid realizes grid-connected Working mould
The negative terminal of DC side is then connected by formula with power grid midpoint, can eliminate common-mode noise, and exchange outlet side voltage can reach directly
Four times for flowing side voltage.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram of one embodiment of one-phase five-level inverter provided by the utility model；
Fig. 2 is that a kind of one-phase five-level inverter provided by the utility model is in operating mode schematic diagram for the moment；
Fig. 3 is schematic diagram when a kind of one-phase five-level inverter provided by the utility model is in operating mode two；
Fig. 4 is schematic diagram when a kind of one-phase five-level inverter provided by the utility model is in operating mode three；
Fig. 5 is schematic diagram when a kind of one-phase five-level inverter provided by the utility model is in operating mode four；
Fig. 6 is schematic diagram when a kind of one-phase five-level inverter provided by the utility model is in operating mode five.
Specific embodiment
The utility model embodiment discloses a kind of one-phase five-level inverter, and the requirement of DC voltage amplitude is lower,
And it can smaller output common mode interference noise without isolating transformer.
Referring to Fig. 1, a kind of one embodiment packet of the one-phase five-level inverter provided in the utility model embodiment
It includes:
First switch tube S1, second switch S2, third switching tube S3, the 4th switch S4 pipe, the 5th switching tube S5, the 6th
Switching tube S6, the 7th switching tube S7, the 8th switching tube S8, first capacitor C1, the second capacitor C2 and diode D1；
The anode connection DC power supply V of diode D1DCAnode, the of the cathode connection first switch tube S1 of diode D1
The second end of one end, first switch tube S1 connects first node；
The first end of second switch S2 is connect with the first end of third switching tube S3, and the second end of second switch S2 connects
Second node is connect, the second end of third switching tube S3 connects DC power supply VDCNegative terminal；
The first end of 4th switching tube S4 connects first node, and the second end of the 4th switching tube S4 connects third node；
The first end of 5th switching tube S5 connects third node, and the second end of the 5th switching tube S5 connects fourth node；
The first end of first capacitor C1 connects first node, and the second end of first capacitor C1 connects fourth node；
The first end of second capacitor C2 connects third node, and the second end of the second capacitor C2 connects the 5th node；
The first end of 6th switching tube S6 connects fourth node, and the second end of the 6th switching tube S6 connects the 5th node；
The first end of 7th switching tube S7 connects second node, and the second end of the 7th switching tube S7 connects the 5th node；
The second end of 8th switching tube S8 connects the 5th node, and the first end of the 8th switching tube S8 is single-phase five level inverse conversion
The negative voltage output end of device, second node be one-phase five-level inverter positive voltage output end, the second of third switching tube S3
End is connected with the first end of the 8th switching tube S8.
Optionally, a kind of one-phase five-level inverter provided by the utility model further include: inductance L；
Second node connects the first end of inductance L, and the second end of inductance L is that the positive voltage of one-phase five-level inverter exports
End.It is understood that the inductance can play filter action.
Optionally, (first switch tube, second switch, third switching tube, the 4th open all switching tubes in the present embodiment
Guan Guan, the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube) it is IGBT or MOSFET.
Optionally, diode is silicon carbide diode or fast recovery diode.
A kind of operating mode of one-phase five-level inverter provided by the utility model will be introduced below:
As shown in Fig. 2, operating mode 1: control switch pipe S1、S4、S6、S7、S8It is open-minded, control switch pipe S2、S3、S5It disconnects,
V at this timeOUT=0.
As shown in figure 3, operating mode 2: control switch pipe S1、S2、S4、S6、S8It is open-minded, control switch pipe S3、S5、S7It disconnects,
V at this timeOUT=VDC。
As shown in figure 4, operating mode 3: control switch pipe S1、S5、S8It is open-minded, control switch pipe S1、S3、S4、S6、S7It disconnects,
V at this timeOUT=2VDC。
As shown in figure 5, operating mode 4: control switch pipe S3、S4、S6、S7It is open-minded, control switch pipe S1、S2、S5、S8It disconnects,
V at this timeOUT=-VDC。
As shown in fig. 6, operating mode 5: control switch pipe S3、S5、S7It is open-minded, control switch pipe S1、S2、S4、S6、S8It disconnects,
V at this timeOUT=-2VDC。
The utility model provides a kind of one-phase five-level inverter and its control method, which includes: first to open
Guan Guan, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th open
Guan Guan, first capacitor, the second capacitor and diode；Inverter structure provided by the utility model is simple, DC voltage amplitude
It is required that it is lower, and can smaller output common mode interference noise without isolating transformer.If the inverter connect realization with power grid
The negative terminal of DC side is then connected by grid-connected operating mode with power grid midpoint, can eliminate common-mode noise, exchange outlet side voltage is most
Height can reach four times of DC voltage.
A kind of one-phase five-level inverter provided by the utility model is described in detail above, for this field
Those skilled in the art have and change in specific embodiments and applications based on the idea of the embodiment of the present invention
Become place, in conclusion the content of the present specification should not be construed as a limitation of the present invention.
Claims (4)
1. a kind of one-phase five-level inverter characterized by comprising first switch tube, second switch, third switching tube,
4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, first capacitor, the second capacitor and two
Pole pipe；
The anode of the anode connection DC power supply of the diode, the cathode of the diode connect the of the first switch tube
The second end of one end, the first switch tube connects first node；
The first end of the second switch is connect with the first end of the third switching tube, the second end of the second switch
Connect second node, the negative terminal of the second end connection DC power supply of the third switching tube；
The first end of 4th switching tube connects the first node, and the second end of the 4th switching tube connects third section
Point；
The first end of 5th switching tube connects the third node, and the second end of the 5th switching tube connects Section four
Point；
The first end of the first capacitor connects the first node, described Section four of the second end connection of the first capacitor
Point；
The first end of second capacitor connects the third node, and the second end of second capacitor connects the 5th node；
The first end of 6th switching tube connects the fourth node, the second end connection the described 5th of the 6th switching tube
Node；
The first end of 7th switching tube connects the second node, the second end connection the described 5th of the 7th switching tube
Node；
The second end of 8th switching tube connects the 5th node, and the first end of the 8th switching tube is described single-phase five
The negative voltage output end of electrical level inverter, the second node are the positive voltage output end of the one-phase five-level inverter, institute
The second end for stating third switching tube is connected with the first end of the 8th switching tube.
2. one-phase five-level inverter according to claim 1, which is characterized in that further include: inductance；
The second node connects the first end of the inductance, and the second end of the inductance is the one-phase five-level inverter
Positive voltage output end.
3. one-phase five-level inverter according to claim 1, which is characterized in that the first switch tube, described second
Switching tube, the third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the described 7th open
8th switching tube described in Guan Guanhe is IGBT or MOSFET.
4. one-phase five-level inverter according to claim 1, which is characterized in that the diode is silicon carbide diode
Or fast recovery diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465018.9U CN208571949U (en) | 2018-09-07 | 2018-09-07 | A kind of one-phase five-level inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465018.9U CN208571949U (en) | 2018-09-07 | 2018-09-07 | A kind of one-phase five-level inverter |
Publications (1)
| Publication Number | Publication Date |
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| CN208571949U true CN208571949U (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821465018.9U Active CN208571949U (en) | 2018-09-07 | 2018-09-07 | A kind of one-phase five-level inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067225A (en) * | 2018-09-07 | 2018-12-21 | 广东电网有限责任公司 | A kind of one-phase five-level inverter and its control method |
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2018
- 2018-09-07 CN CN201821465018.9U patent/CN208571949U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067225A (en) * | 2018-09-07 | 2018-12-21 | 广东电网有限责任公司 | A kind of one-phase five-level inverter and its control method |
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