CN206640518U - A kind of eight switching inverters - Google Patents
A kind of eight switching inverters Download PDFInfo
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- CN206640518U CN206640518U CN201720410818.XU CN201720410818U CN206640518U CN 206640518 U CN206640518 U CN 206640518U CN 201720410818 U CN201720410818 U CN 201720410818U CN 206640518 U CN206640518 U CN 206640518U
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Abstract
A kind of eight switching inverters, including first switch, second switch, third switch, the 4th switch, the 5th switch, the 6th switch, the 7th switch, the 8th switch.First switch connects with the output end of second switch, and the 3rd switch connects with the input of the 4th switch, and the 5th switch connects with the output end of the 6th switch, and the 7th switch connects with the input of the 8th switch.It is connected after the output end connection that the input of first switch, the output end of the 3rd switch, the input of the 5th switch and the 7th switch and with the negative or positive electrode of DC source.The input of second switch, the output end of the 4th switch, the input of the 6th switch, the output end of the 8th switch are connected after connecting with another pole of DC source.The advantages of utility model, is：So without setting dead band to avoid instantaneous short circuit to the drive signal switched in circuit.
Description
Technical field
Inverter field is the utility model is related to, especially a kind of eight switching inverters.
Background technology
It is more and more urgent to the demand of clean energy resource with environmental pollution and the aggravation of energy crisis, generation of electricity by new energy skill
Art is arisen at the historic moment, and inverter is then the essential important component of generation of electricity by new energy.Photovoltaic generation is a kind of typical new
Energy forms of electricity generation, in photovoltaic generating system, the electric energy that solar panel is sent is direct current, but China's domestic power grid
Substantially AC network, and the load of civilian electric power is also mostly AC load, therefore the direct current that solar panel is sent
Be not suitable for being directly used in daily power supply, it is necessary to be the alternating current that matches with civilian electric power by DC conversion, realize system
Standardization and compatibility.DC conversion caused by generation of electricity by new energy is and handed over by inverter by the switching switched in circuit
The alternating current of power network same frequency same-phase is flowed, is connected with AC network, energy is conveyed to power network, so as to ensure generation of electricity by new energy
The reliable utilization of produced electric energy.
Full-bridge inverter of the prior art, as shown in figure 1, in circuit one share eight switch and two inductance.Eight
Switch is respectively controllable single-way switch So1, diode Do1, controllable single-way switch So2, diode Do2, controllable single-way switch
So3, diode Do3, controllable single-way switch So4, diode Do4, controllable single-way switch can pass through the high and low electricity of drive signal
The turn-on and turn-off of flat controlling switch, and during switch conduction electric current can only one way flow, diode Do1, diode Do2, two
Tetra- pole pipe Do3, diode Do4 switches are uncontrollable single-way switch, and uncontrollable single-way switch does not need drive signal to be controlled
System, as long as it bears forward voltage, switch turns on, otherwise switch OFF, and electric current can only one way flow during switch conduction.
Inductance is L1 and L2, serves the effect of filtering.
In full-bridge inverter, controllable single-way switch So1, controllable single-way switch So4 drive signal are identical, and two switches are same
When turn-on and turn-off, controllable single-way switch So2, controllable single-way switch So3 drive signal are identical, two switch simultaneously turn on and
Shut-off, and controllable single-way switch So1, controllable single-way switch So4 and controllable single-way switch So2, controllable single-way switch So3 are alternately led
It is logical, you can controllable single-way switch So2, controllable single-way switch So3 are closed when control single-way switch So1, controllable single-way switch So4 conductings
Disconnected, controllable single-way switch So2, controllable single-way switch So3 are turned on when controllable single-way switch So1, controllable single-way switch So4 are turned off.
UDCFor input direct voltage, polarity of voltage all the time will on just lower negative, uACFor output AC voltage, when controllable single-way switch So1,
U during controllable single-way switch So4 conductingsACIt is just lower negative on polarity of voltage, when controllable single-way switch So2, controllable single-way switch So3 are turned on
When uACUnder being born on polarity of voltage just, therefore uACSize and Orientation change over time, full-bridge inverter realize direct current to hand over
Flow the transformation of electrical energy of electricity.
It can be seen that from the circuit diagram of full-bridge inverter straight after controllable single-way switch So1, controllable single-way switch So2 connect
Connect and input dc power UDCParallel connection, equally switch also direct and defeated after controllable single-way switch So3, controllable single-way switch So4 connect
Enter direct current UDCIt is in parallel.In controllable single-way switch So1, controllable single-way switch So4 shut-off, controllable single-way switch So2, controllable unidirectional
Switch the moment of So3 conductings, and controllable single-way switch So1, controllable single-way switch So4 conducting, controllable single-way switch So2, can
The moment of single-way switch So3 shut-off is controlled, because the unreliable turn-on and turn-off of switch, can cause controllable in very short time unidirectionally to hold
Conducting and turned on while closing So1, controllable single-way switch So2 while controllable single-way switch So3, controllable single-way switch So4, this
It will result in input dc power UDCInstantaneous short circuit, can controllable single-way switch So1, controllable single-way switch So2 series arm
And great electric current is produced in controllable single-way switch So3, controllable single-way switch So4 series arm, switch is caused can not
The infringement of reverse, it have impact on security when reliability and the work of inverter.
Therefore, full bridge inverter needs to set dead band to the drive signal switched in circuit to avoid instantaneous short circuit, i.e.,
The delay of short time is carried out at the time of high level is changed into from low level to drive signal, so as to shortcoming of both causing, one
It is the complexity for setting dead band to add inverter control, second, dead band can cause the alternating voltage and electric current that inverter exports
It is distorted, reduces the quality of power supply that inverter conveys to power network.
Utility model content
The purpose of this utility model is in the driving for solving to switch during full bridge inverter needs to circuit in the prior art
Signal sets dead band to carry out the short time that is, at the time of high level is changed into from low level to drive signal to avoid instantaneous short circuit
Delay issue, therefore, a kind of eight switching inverters is provided herein.
A kind of eight switching inverters, it is characterised in that including first switch, second switch, third switch, the 4th switch,
5th switch, the 6th switch, the 7th switch, the 8th switch；
The first switch connects with the output end of second switch, and the input of the 3rd switch and the 4th switch connects
Connect, the 5th switch connects with the output end of the 6th switch, and the 7th switch connects with the input of the 8th switch；
The input of the first switch, the output end of the 3rd switch, the input of the 5th switch and the 7th switch defeated
Go out after the connection of end and be connected with the negative or positive electrode of DC source；
The output of the input of the second switch, the output end of the 4th switch, the input of the 6th switch, the 8th switch
It is connected after the connection of end with another pole of DC source.
Further, in addition to the first inductance, the second inductance, the 3rd inductance, the 4th inductance；
As exchanging one end for exporting after one end connection of described first inductance one end and the second inductance, the first inductance it is another
The output end of one end and first switch connects；The other end of second inductance is connected with the input of the 3rd switch；
One end of 3rd inductance and one end of the 4th inductance are connected as the other end for exchanging output, the 3rd inductance
The other end is connected with the output end of the 5th switch, the input connection of the other end of the 4th inductance and the 7th switch.
Further, the drive end of the first switch, the drive end of the 3rd switch, the drive end of the 6th switch, the 8th
The drive end connection of switch is used as the first drive end, the drive end of the second switch, the drive end of the 4th switch, the 5th switch
Drive end, the 7th switch drive end connection be used as the second drive end.
Further, first drive end and the second drive end open and close complementary.
Further, the first switch, second switch, third switch, the 4th switch, the 5th switch, the 6th switch, the
Seven switches, the 8th switch are controllable single-way switch.
Further, the DC source is photovoltaic panel.
Further, the input of the first switch, the output end of the 3rd switch, the input and the 7th of the 5th switch
It is connected after the output end connection of switch and with the positive pole of DC source.
Further, in addition to EMI FILTER, the EMI FILTER includes first input end, second defeated
Enter end, the first output end and the second output end, the first input end of the EMI FILTER and the first inductance and the second electricity
The tie point connection of sense, the second input is connected with the tie point of the 3rd inductance and the 4th inductance, the first output end and second defeated
Go out the both ends that end is respectively exchange output.
The utility model has the advantage of：Direct and input dc power U after switch is connected is not present in the utility modelDCAnd
The situation of connection, at least two inductance appear in the series connection branch of switch all the time in inductance L1, inductance L2, inductance L3, inductance L4
Lu Zhong.Because inductive current can not be mutated, the switch series arm with inductance will not cause UDCInstantaneous short circuit and produce big electricity
Stream, therefore without setting dead band to the drive signal switched in circuit to avoid instantaneous short circuit, avoiding problems full-bridge inverting electricity
The shortcomings that road.
Brief description of the drawings
Fig. 1 is the schematic diagram of inverter in the prior art.
When Fig. 2 is that the positive pole of the input of first switch and DC source connects in a kind of eight switching inverter of the utility model
Circuit diagram.
When Fig. 3 is that the positive pole of the input of first switch and DC source connects in a kind of eight switching inverter of the utility model
And the circuit diagram including EMI FILTER.
When Fig. 4 is that the negative pole of the input of first switch and DC source connects in a kind of eight switching inverter of the utility model
Circuit diagram.
When Fig. 5 is that the negative pole of the input of first switch and DC source connects in a kind of eight switching inverter of the utility model
And the circuit diagram including EMI FILTER.
Embodiment
Embodiment 1
As shown in Fig. 2 a kind of eight switching inverters, including first switch S1, second switch S2, the 3rd switch S3, the 4th
Switch S4, the 5th switch S5, the 6th switch S6, the 7th switch S7, the 8th switch S8, the first inductance L1, the second inductance L2, the 3rd
Inductance L3, the 4th inductance L4.The first switch S1 connects with second switch S2 output end, the 3rd switch S3 and the 4th
Switch S4 input connection, the 5th switch S5 and the 6th switch S6 output end connection, the 7th switch S7 and the
Eight switch S8 input connection.The input of the first switch S1, the 3rd switch S3 output end, the 5th switch the defeated of S5
Enter end and the 7th switch S7 output end connect after and with DC source UDCPositive pole connection.
The input of the second switch S2, the 4th switch S4 output end, the 6th switch S6 input, the 8th switch
S8 output end connection after with DC source UDCNegative pole connection.
As exchanging one end for exporting, the first inductance after described first inductance L1 one end and the second inductance L2 one end connection
The L1 other end is connected with first switch S1 output end；The input of the other end of the second inductance L2 and the 3rd switch S3
Connection.One end of the 3rd inductance L3 and the 4th inductance L4 one end connection are as the other end for exchanging output, the 3rd inductance
The L3 other end is connected with the 5th switch S5 output end, and the 4th inductance L4 other end and the 7th switch S7 input connect
Connect.
Further, the driving of the drive end of the first switch S1, the 3rd switch S3 drive end, the 6th switch S6
The drive end connection at end, the 8th switch S8 is used as the first drive end, the drive of the drive end of the second switch S2, the 4th switch S4
The drive end connection of moved end, the 5th switch S5 drive end, the 7th switch S7 is used as the second drive end.First drive end and second
Drive end opens and closes complementary.
Further, the first switch S1, second switch S2, the 3rd switch S3, the 4th switch S4, the 5th switch S5,
6th switch S6, the 7th switch S7, the 8th switch S8 are controllable single-way switch.
Further, the DC source UDCFor photovoltaic panel.
As shown in figure 3, inverter also includes EMI FILTER 1, the EMI FILTER 1 includes the first input
End, the second input, the first output end and the second output end, the first input end of the EMI FILTER 1 and the first electricity
Feel L1 and the second inductance L2 tie point connection, the second input is connected with the 3rd inductance L3 and the 4th inductance L4 tie point,
First output end is respectively to exchange the both ends of output with the second output end.
Embodiment 2
As shown in figure 4, a kind of eight switching inverters, including first switch S1, second switch S2, the 3rd switch S3, the 4th
Switch S4, the 5th switch S5, the 6th switch S6, the 7th switch S7, the 8th switch S8, the first inductance L1, the second inductance L2, the 3rd
Inductance L3, the 4th inductance L4.The first switch S1 connects with second switch S2 output end, the 3rd switch S3 and the 4th
Switch S4 input connection, the 5th switch S5 and the 6th switch S6 output end connection, the 7th switch S7 and the
Eight switch S8 input connection.The input of the first switch S1, the 3rd switch S3 output end, the 5th switch the defeated of S5
Enter end and the 7th switch S7 output end connect after and with DC source UDCNegative pole connection.
The input of the second switch S2, the 4th switch S4 output end, the 6th switch S6 input, the 8th switch
S8 output end connection after with DC source UDCPositive pole connection.
As exchanging one end for exporting, the first inductance after described first inductance L1 one end and the second inductance L2 one end connection
The L1 other end is connected with first switch S1 output end；The input of the other end of the second inductance L2 and the 3rd switch S3
Connection.One end of the 3rd inductance L3 and the 4th inductance L4 one end connection are as the other end for exchanging output, the 3rd inductance
The L3 other end is connected with the 5th switch S5 output end, and the 4th inductance L4 other end and the 7th switch S7 input connect
Connect.
Further, the driving of the drive end of the first switch S1, the 3rd switch S3 drive end, the 6th switch S6
The drive end connection at end, the 8th switch S8 is used as the first drive end, the drive of the drive end of the second switch S2, the 4th switch S4
The drive end connection of moved end, the 5th switch S5 drive end, the 7th switch S7 is used as the second drive end.First drive end and second
Drive end opens and closes complementary.
Further, the first switch S1, second switch S2, the 3rd switch S3, the 4th switch S4, the 5th switch S5,
6th switch S6, the 7th switch S7, the 8th switch S8 are controllable single-way switch.
Further, the DC source UDCFor photovoltaic panel.
As shown in figure 5, inverter also includes EMI FILTER 1, the EMI FILTER 1 includes the first input
End, the second input, the first output end and the second output end, the first input end of the EMI FILTER 1 and the first electricity
Feel L1 and the second inductance L2 tie point connection, the second input is connected with the 3rd inductance L3 and the 4th inductance L4 tie point,
First output end is respectively to exchange the both ends of output with the second output end.
Embodiment 3
A kind of control method of eight switching inverters, wherein the connected mode of eight switching inverters is same as Example 1.It is first
First in the positive half cycle of line voltage, it is high level, now, DC source U to control the first drive endDC, first switch S1, the first inductance
L1, ac output end uAC, the 4th inductance L4, the 8th switch S8 form loop；Then in line voltage negative half period, control second
Drive end is high level, now, DC source UDC, the 5th switch S5, the 3rd inductance L3, ac output end uAC, the second inductance L2,
4th switch S4 forms loop.
Embodiment 4
A kind of control method of eight switching inverters, wherein the connected mode of eight switching inverters is same as Example 2.It is first
First in the positive half cycle of line voltage, it is high level, now, DC source U to control the second drive endDC, second switch S2, the first inductance
L1, ac output end uAC, the 4th inductance L4, the 7th switch S7 form loop；Then in line voltage negative half period, control second
Drive end is high level, now, DC source UDC, the 6th switch S6, the 3rd inductance L3, ac output end uAC, the second inductance L2,
3rd switch S3 forms loop.
The preferred embodiment that the utility model is created is these are only, is not created to limit the utility model, it is all
All any modification, equivalent and improvement made within the spirit and principle that the utility model is created etc., should be included in this
Within the protection domain that utility model is created.
Claims (8)
1. a kind of eight switching inverters, it is characterised in that including first switch, second switch, third switch, the 4th switch, the
Five switches, the 6th switch, the 7th switch, the 8th switch；
The first switch connects with the output end of second switch, and the 3rd switch connects with the input of the 4th switch, institute
The output end that the 5th switch is stated with the 6th switch connects, and the 7th switch connects with the input of the 8th switch；
The input of the first switch, the output end of the 3rd switch, the input of the 5th switch and the 7th output end switched
It is connected after connection and with the negative or positive electrode of DC source；
The input of the second switch, the output end of the 4th switch, the input of the 6th switch, the output end of the 8th switch connect
Connect and be connected afterwards with another pole of DC source.
A kind of 2. eight switching inverter according to claim 1, it is characterised in that also including the first inductance, the second inductance,
3rd inductance, the 4th inductance；
As exchanging one end for exporting, the other end of the first inductance after one end connection of described first inductance one end and the second inductance
It is connected with the output end of first switch；The other end of second inductance is connected with the input of the 3rd switch；
One end connection of one end of 3rd inductance and the 4th inductance as exchanging the other end that exports, the 3rd inductance it is another
The output end with the 5th switch is held to be connected, the input connection of the other end of the 4th inductance and the 7th switch.
3. a kind of eight switching inverter according to claim 1, it is characterised in that the drive end of the first switch,
The drive end connection of the drive end of three switches, the drive end of the 6th switch, the 8th switch is used as the first drive end, and described second opens
The drive end connection of the drive end of pass, the drive end of the 4th switch, the drive end of the 5th switch, the 7th switch is as the second driving
End.
4. a kind of eight switching inverter according to claim 3, it is characterised in that first drive end and the second driving
End opens and closes complementary.
5. a kind of eight switching inverter according to claim 1, it is characterised in that the first switch, second switch,
Three switches, the 4th switch, the 5th switch, the 6th switch, the 7th switch, the 8th switch are controllable single-way switch.
6. a kind of eight switching inverter according to claim 1, it is characterised in that the DC source is photovoltaic panel.
7. a kind of eight switching inverter according to claim 1, it is characterised in that the input of the first switch,
It is connected after the output end connection of the output end of three switches, the input of the 5th switch and the 7th switch and with the positive pole of DC source.
8. a kind of eight switching inverter according to claim 1, it is characterised in that also including EMI FILTER, institute
Stating EMI FILTER includes first input end, the second input, the first output end and the second output end, the electromagnetic interference
The first input end of wave filter is connected with the tie point of the first inductance and the second inductance, the second input and the 3rd inductance and the 4th
The tie point connection of inductance, the first output end are respectively to exchange the both ends of output with the second output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720410818.XU CN206640518U (en) | 2017-04-19 | 2017-04-19 | A kind of eight switching inverters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720410818.XU CN206640518U (en) | 2017-04-19 | 2017-04-19 | A kind of eight switching inverters |
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| Publication Number | Publication Date |
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| CN206640518U true CN206640518U (en) | 2017-11-14 |
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| CN201720410818.XU Expired - Fee Related CN206640518U (en) | 2017-04-19 | 2017-04-19 | A kind of eight switching inverters |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899221A (en) * | 2017-04-19 | 2017-06-27 | 国网江苏省电力公司新沂市供电公司 | A kind of eight switching inverters and its control method |
-
2017
- 2017-04-19 CN CN201720410818.XU patent/CN206640518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899221A (en) * | 2017-04-19 | 2017-06-27 | 国网江苏省电力公司新沂市供电公司 | A kind of eight switching inverters and its control method |
| CN106899221B (en) * | 2017-04-19 | 2023-10-03 | 国网江苏省电力公司新沂市供电公司 | Eight-switch inverter and control method thereof |
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Granted publication date: 20171114 Termination date: 20180419 |