CN104218839B - Multi-electrical level inverter - Google Patents
Multi-electrical level inverter Download PDFInfo
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- CN104218839B CN104218839B CN201410505986.8A CN201410505986A CN104218839B CN 104218839 B CN104218839 B CN 104218839B CN 201410505986 A CN201410505986 A CN 201410505986A CN 104218839 B CN104218839 B CN 104218839B
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Abstract
The present invention relates to inverter.The present invention is fragile for inverter switching device pipe of the prior art, the efficiency of inverter power supply is low, the problems such as electromagnetic interference at DC ends, propose multi-electrical level inverter, including DC energy generation device, AC energy generation device, modulation circuit and MCU, also include switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven, switch module eight, switch module nine, diode one, diode two, diode three, diode four, diode five, diode six, diode seven, diode eight, diode nine, inductance one, inductance two and division module.Increase switching tube and diode with bus capacitor midpoint by the tandem tap pipe in loop of power circuit, and in the middle of bridge arm so that no matter in positive half cycle or negative half period, two inductance work simultaneously, while inductance utilization rate is improved, improve DC electromagnetic interference problem.Suitable for multi-electrical level inverter.
Description
Technical field
The present invention relates to inverter, more particularly to multi-electrical level inverter.
Background technology
Inverter is a kind of device for converting electric energy, and main realize is changed by the energy of direct current to exchange.Combining inverter bag
Include photovoltaic combining inverter, wind power grid-connected inverter, fuel cell combining inverter etc..Combining inverter can be by regenerative resource
The energy efficient of generation can be converted to and can be connected to civil power with civil power same frequency, the alternating current of same-phase.
Divided by its circuit form：Semi-bridge inversion power supply and full bridge inverse conversion power.The wherein control of full bridge inverse conversion power
Mode has two kinds：Unipolar SPWM is modulated, bipolar SPWM modulation.Two switching tubes that bipolar SPWM modulates same bridge arm are mutual
Driving is mended, the inconsistent of circuit parameter is controlled due to switching tube conducting, the inconsistency of cut-off characteristics and dead time, can
Two switching tubes of same bridge arm can be caused to simultaneously turn on, and then cause switching tube to damage.Unipolar SPWM control has：In civil power
Negative half period all only one of which switching tubes make high frequency switching, cause the utilization rate of outputting inductance to decline, and then reduce inverter electricity
The efficiency in source；The electromagnetic interference problem for causing DC ends of this kind of control mode is quite protruded.
The content of the invention
The technical problems to be solved by the invention, are just to provide a kind of multi-electrical level inverter, to reach lifting inverter effect
Rate and the effect for improving direct solenoid interference.
The present invention solves the technical problem, and the technical scheme of use is that multi-electrical level inverter, including DC energy are produced
Device, AC energy generation device, modulation circuit and MCU, it is characterised in that also including inverter circuit, the inverter circuit bag
Include switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module
7th, switch module eight, switch module nine, diode one, diode two, diode three, diode four, diode five, diode
6th, diode seven, diode eight, diode nine, inductance one, inductance two and division module, the DC energy generation device
Input of the positive pole respectively with division module, the negative electrode of diode one and switch module one is connected, the output end of switch module one
Input, the input of switch module three, the anode of diode one, the negative electrode of diode two and two respectively with switch module two
The negative electrode connection of pole pipe three, the output end of switch module two one end respectively with inductance one, the input of switch module four, switch
The anode connection of the output end of module seven, the negative electrode of diode four and diode seven, the output end of switch module three respectively with electricity
Feel the sun of two one end, the input of switch module five, the output end of switch module nine, the negative electrode of diode five and diode nine
Pole is connected, and the other end of inductance one is connected by AC energy generation device with the other end of inductance two, switch module seven it is defeated
The negative electrode for entering end input respectively with switch module six, the negative electrode of diode seven and diode six is connected, switch module six
Anode, the output end of switch module eight, the anode of diode eight and the division module of output end respectively with diode six are connected, point
Die block negative pole also respectively with DC energy generation device, the output end of switch module four, the output end of switch module five, two
The anode connection of the anode of pole pipe four and diode five, the input of switch module eight input respectively with switch module nine,
The negative electrode connection of the negative electrode and diode nine of diode eight, the control end of the S1 of switch module one, the S4 of switch module four control
End processed and the S5 of switch module five control end are connected by modulation circuit with MCU respectively, the S2 of switch module two control end, switch
The S3 of module three control end, the S6 of switch module six control end, the S7 of switch module seven control end, the S8 of switch module eight control
End and the S9 of switch module nine control end are connected with MCU；
High-frequency pulse signal output end and power frequency pulse signal output end are provided with the MCU, for controlling switch mould
Block one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven, switching molding
The working condition of block eight and switch module nine；
The modulation circuit, for the high-frequency pulse signal that exports MCU and sinusoidal signal modulation into opening for driving
Close module one, switch module four and the high frequency trigger signal of switch module five；The sinusoidal signal and the AC energy are produced
The AC power same frequency and same-phase of device；
The division module, the input ripple for reducing inverter link, is additionally operable to bus partial pressure.
Specifically, the division module includes electric capacity one and electric capacity two, positive pole and the DC energy of the electric capacity one are produced
The positive pole connection of device, the negative pole of electric capacity one is connected with the anode of electric capacity two and the input of switch module six respectively, electric capacity two
Negative pole be connected with the negative pole of DC energy generation device.
Further, the electric capacity one and electric capacity two are respectively bus capacitor.
Specifically, the inductance one and inductance two are filter inductance.
Specifically, the DC energy generation device can cell panel, wind energy battery or fuel cell for sun.
The beneficial effects of the invention are as follows, a switching tube of being connected in loop of power circuit, and in the middle of each bridge arm and bus
Electric capacity midpoint adds two switching tubes and two diodes so that no matter in positive half cycle or negative half period, two inductance are while work
Make, while inductance utilization rate is improved, improve DC electromagnetic interference problem；
Due to the introducing of current following device so that energy storage device is not involved in afterflow process, and the current potential that 2 points of a, b is in afterflow process
Middle current potential keeps of substantially equal, and 2 potential change amounts of inverter mode and freewheeling state a, b are smaller, and this reduces DC electromagnetism
Interference problem；
Three switching tubes that inverter in the present invention is used all make high frequency switching, and no matter this causes in positive-negative half-cycle,
The current potential of two filter inductances L1, L2 interior side terminal is all in high-frequency impulse, and its outer side terminal is civil power, and this improves filter
The utilization rate of ripple inductance；
Present invention introduces circuit, it is possible to achieve five level modes, two filter inductances L1, L2 can reduce, and improve
Overall efficiency；Simultaneously as the voltage of main switch high frequency conversion is Vdc half, the switching loss reduction of main switch is entered
And also improve overall efficiency；
Relative to traditional inverter circuit structure, the circuit improves the utilization rate of inductance, reduces free wheeling path, improves whole
Engine efficiency, while reducing the DC electromagnetic interference problems of machine so that the various aspects performance boost of inverter.
Brief description of the drawings
Fig. 1 is the efficient inverter structural representation in multi-electrical level inverter example of the present invention；
Oscillogram when Fig. 2 works for the efficient inverter in multi-electrical level inverter example of the present invention on each part；
Fig. 3 exports current loop during positive half cycle alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
One schematic diagram；
Fig. 4 exports current loop during positive half cycle alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
Two schematic diagrames；
Fig. 5 exports current loop during positive half cycle alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
Three schematic diagrames；
Fig. 6 exports continuous current circuit during positive half cycle alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
Schematic diagram；
Fig. 7 exports current loop during negative half period alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
One schematic diagram；
Fig. 8 exports current loop during negative half period alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
Two schematic diagrames；
Fig. 9 exports current loop during negative half period alternating current for the efficient inverter in multi-electrical level inverter example of the present invention
Three schematic diagrames；
Afterflow when Figure 10 exports negative half period alternating current for the efficient inverter in multi-electrical level inverter example of the present invention is returned
Road schematic diagram；
Wherein, DC energy generation device-Vdc, AC energy generation device -- Vac, switch module one -- S1, switch
-- S2, switch module three -- S3, switch module four -- S4, switch module five -- S5, switch module six -- S6, the switching molding of module two
Block seven -- S7, switch module eight -- S8, switch module nine -- S9, diode one -- D1, diode two -- D2, diode three --
D3, diode four -- D4, diode five -- D5, diode six -- D6, diode seven -- D7, diode eight -- D8, diode
Nine -- D9, inductance one -- L1, inductance two -- L2, electric capacity one -- C1 and electric capacity two -- C2.
Embodiment
Below in conjunction with the accompanying drawings and embodiment be described in detail technical scheme：
The present invention is directed in the prior art, and bipolar SPWM modulates two switching tube complementary drives of same bridge arm, due to
Switching tube conducting, the control circuit parameter of the inconsistency of cut-off characteristics and dead time it is inconsistent, may cause same
Two switching tubes of bridge arm are simultaneously turned on, and then cause switching tube to damage；And Unipolar SPWM control has, in civil power negative half period all
Only one of which switching tube makees high frequency switching, causes the utilization rate of outputting inductance to decline, and then reduces the efficiency of inverter power supply,
The suitable distinct issues of electromagnetic interference problem at DC ends are caused to produce dress there is provided a kind of multi-electrical level inverter, including DC energy
Put, AC energy generation device, modulation circuit and MCU, it is characterised in that also including inverter circuit, the inverter circuit includes
Switch module one, switch module two, switch module three, switch module four, switch module five, switch module six, switch module seven,
Switch module eight, switch module nine, diode one, diode two, diode three, diode four, diode five, diode six,
Diode seven, diode eight, diode nine, inductance one, inductance two and division module, the positive pole of the DC energy generation device
The input with division module, the negative electrode of diode one and switch module one is connected respectively, the output end difference of switch module one
Input, the input of switch module three, the anode of diode one, the negative electrode and diode of diode two with switch module two
Three negative electrode connection, the output end of switch module two one end respectively with inductance one, the input of switch module four, switch module
The anode connection of seven output end, the negative electrode of diode four and diode seven, the output end of switch module three respectively with inductance two
One end, the input of switch module five, the output end of switch module nine, the anode of the negative electrode of diode five and diode nine connect
Connect, the other end of inductance one is connected by AC energy generation device with the other end of inductance two, the input of switch module seven
The negative electrode of input respectively with switch module six, the negative electrode of diode seven and diode six is connected, the output of switch module six
Anode, the output end of switch module eight, the anode of diode eight and the division module of end respectively with diode six are connected, partial pressure mould
Negative pole, the output end of switch module four, the output end of switch module five, the diode of block also respectively with DC energy generation device
The anode connection of four anode and diode five, the input of switch module eight input respectively with switch module nine, two poles
The negative electrode connection of the negative electrode of pipe eight and diode nine, the control end of the switch module one, the control end of switch module four and is opened
The control end for closing module five is connected by modulation circuit with MCU respectively, the control end of switch module two, the control of switch module three
End, the control end of switch module six, the control end of switch module seven, the S8 of switch module eight control end and switch module nine
Control end is connected with MCU；High-frequency pulse signal output end and power frequency pulse signal output end are provided with the MCU, for controlling
Switch module one processed, switch module two, switch module three, switch module four, switch module five, switch module six, switch module
7th, the working condition of switch module eight and switch module nine；The modulation circuit, for the high-frequency pulse signal for exporting MCU
With sinusoidal signal modulation into for the switch module one of driving, switch module four and the high frequency trigger signal of switch module five；By institute
State sinusoidal signal and the AC power same frequency and same-phase of the AC energy generation device；The division module, for dropping
The input ripple of low inverter link, is additionally operable to bus partial pressure.One switching tube of series connection in loop of power circuit, and in each bridge
Two switching tubes and two diodes are added with bus capacitor midpoint so that in the middle of arm no matter in positive half cycle or negative half period, two
Individual inductance works simultaneously, while inductance utilization rate is improved, improves DC electromagnetic interference problem；Due to drawing for current following device
Enter so that energy storage device is not involved in afterflow process, the current potential that 2 points of a, b current potential during afterflow keeps of substantially equal and inverse
2 potential change amounts of change state and freewheeling state a, b are smaller, and this reduces DC electromagnetic interference problems；Inversion in the present invention
Three switching tubes that device is used all make high frequency switching, and no matter this causes in positive-negative half-cycle, two filter inductances L1, L2 inner side
The current potential of terminals is all in high-frequency impulse, and its outer side terminal is civil power, and this improves the utilization rate of filter inductance；The present invention draws
The circuit entered, it is possible to achieve five level modes, two filter inductances L1, L2 can reduce, and improve overall efficiency；Meanwhile, by
The half for being Vdc in the voltage of main switch high frequency conversion, the switching loss reduction of main switch, and then also improve complete machine effect
Rate；Relative to traditional inverter circuit structure, the circuit improves the utilization rate of inductance, reduces free wheeling path, improves complete machine effect
Rate, while reducing the DC electromagnetic interference problems of machine so that the various aspects performance boost of inverter.
Embodiment 1
The multi-electrical level inverter of this example, as shown in figure 1, including DC energy generation device Vdc, AC energy generation device
Vac, modulation circuit and MCU, it is characterised in that also including inverter circuit, the inverter circuit include the S1 of switch module one, switch
The S2 of module two, the S3 of switch module three, the S4 of switch module four, the S5 of switch module five, the S6 of switch module six, the S7 of switch module seven, open
Close the S8 of module eight, the S9 of switch module nine, the D1 of switching molding diode one, the D2 of diode two, the D3 of diode three, the D4 of diode four, two
The D5 of pole pipe five, the D6 of diode six, the D7 of diode seven, the D8 of diode eight, the D9 of diode nine, the L1 of inductance one, the L2 of inductance two, electric capacity one
Positive pole, the switching molding diode one of C1 and electric capacity two C2, the DC energy generation device Vdc positive pole respectively with the C1 of electric capacity one
The input connection of D1 negative electrode and the S1 of switch module one, the S1 of switch module one output end is defeated with the S2 of switch module two respectively
Enter end, the S3 of switch module three input end, the D1 of diode one anode, the D2 of diode two negative electrode and the D3 of diode three the moon
Pole is connected, the S2 of switch module two output end one end respectively with the L1 of inductance one, the S4 of switch module four input, switch module
The anode connection of seven S7 output end, the D4 of diode four negative electrode and the D7 of diode seven, the S3 of switch module three output end difference
One end, the S5 of switch module five input, the S9 of switch module nine output end, the D5 of diode five negative electrode with the L2 of inductance two and
The D9 of diode nine anode connection, the L1 of inductance one other end passes through the another of the AC energy generation device Vac and L2 of inductance two
End connection, input, the D7 of diode seven negative electrode and two poles of the S7 of switch module seven input respectively with the S6 of switch module six
The D6 of pipe six negative electrode connection, the S6 of switch module six output end anode respectively with the D6 of diode six, the S8 of switch module eight it is defeated
Go out end, the D8 of diode eight anode, the C1 of electric capacity one negative pole and the C2 of electric capacity two positive pole connection, the C2 of electric capacity two negative pole is also distinguished
Negative pole, the S4 of switch module four output end, the S5 of switch module five output end, diode with DC energy generation device Vdc
Four D4 anode and the D5 of diode five anode connection, the input of the S8 of switch module eight input respectively with the S9 of switch module nine
The negative electrode connection at end, the D8 of diode eight negative electrode and the D9 of diode nine, the control end of the S1 of switch module one, switch module four
S4 control end and the S5 of switch module five control end are connected by modulation circuit with MCU respectively, the S2 of switch module two control
End, the S3 of switch module three control end, the S6 of switch module six control end, the S7 of switch module seven control end, switch module eight
S8 control end and the S9 of switch module nine control end are connected with MCU；Wherein, modulation circuit in MCU figures with not providing.
High-frequency pulse signal output end and power frequency pulse signal output end are provided with the MCU, for controlling switch mould
The S1 of block one, the S2 of switch module two, the S3 of switch module three, the S4 of switch module four, the S5 of switch module five, the S6 of switch module six, switch
The S7 of module seven, the S8 of switch module eight and the S9 of switch module nine working condition；Wherein, the S1 of switch module one, the S4 of switch module four,
The S5 of switch module five control end first, the four, the 5th high-frequency pulse signal output end phases through a modulation circuit with MCU respectively
Connection；
The S2 of switch module two, the S3 of switch module three, the S6 of switch module six, the S7 of switch module seven, the S8 of switch module eight
And the S9 of switch module nine is connected with MCU six power frequency pulse signal output ends respectively.
The modulation circuit, for the high-frequency pulse signal that exports MCU and sinusoidal signal modulation into opening for driving
Close the S1 of module one, the S4 of switch module four and the S5 high frequency trigger signals of switch module five；By the sinusoidal signal modulation into it is described
AC energy generation device Vac AC power same frequency and same-phase.
DC energy generation device Vdc described above positive and negative electrode two ends provided with filtering bus capacitor, the i.e. C1 of electric capacity one and
The C2 of electric capacity two, input ripple and bus partial pressure for reducing inverter link.DC energy generation device Vdc, can be too
Positive energy cell panel, wind energy or fuel cell etc..The L1 of the inductance one and L2 of inductance two is filter inductance.
Oscillogram during above-mentioned efficient inverter work on each part, as shown in Figure 2.
Embodiment 2
During multi-electrical level inverter work in embodiment 1, when being output as positive half cycle, the S2 of MCU controlling switches module two, open
The S7 of the module seven and S8 of switch module eight is closed open-minded in whole positive half cycle, while making the S3 of switch module three, the S6 of switch module six and opening
Close module nine S9 cut-off, and the S1 of switch module one and the S5 of switch module five is worked in HF switch so that the L1 of inductance one and
The positive half cycle of output AC power source on the outside of the L2 of inductance two.
When being output as negative half period, the S3 of MCU controlling switches module three, the S6 of switch module six and the S9 of switch module nine are whole
Negative half period is open-minded, while ending the S2 of switch module two, the S7 of switch module seven and the S8 of switch module eight, and makes the S1 of switch module one
And, the S4 of switch module four and HF switch work, make the negative half period of output AC power source on the outside of the L1 of the inductance one and L2 of inductance two；
So go round and begin again.
Between the AC energy generation device Vac of the L1 of inductance one and the L2 of inductance two outboard end produces positive half period,
The S2 of switch module two, the S7 of switch module seven and the S8 of switch module eight open in whole positive half cycle
When the high frequency trigger signal that the S1 of switch module one high frequency trigger signal is the S5 of high level Simultaneous Switching module five is
During low level, DC energy generation device Vdc positive pole, the S1 of switch module one, the S2 of switch module two, the L1 of inductance one, alternating current energy
Volume production generating apparatus Vac, the L2 of inductance two, the D9 of diode nine, the S8 of switch module eight, the C2 of electric capacity two and DC energy generation device Vdc
Negative pole constitute current loop successively；Its current trend, as shown in Figure 3.
When the S1 of switch module one and the S5 of switch module five high frequency trigger signal are high level, the S1 of switch module one and switch
The S5 of module five is turned on, DC energy generation device Vdc positive pole, the S1 of switch module one, the S2 of switch module two, the L1 of inductance one, friendship
Stream energy generation device Vac, the L2 of inductance two, the S5 of switch module five and DC energy generation device Vdc negative poles constitute electric current successively
Loop；Its current trend, as shown in Figure 4.
When the S1 of switch module one high frequency trigger signal is low level, the S5 trigger signals of Simultaneous Switching module five are high,
DC energy generation device Vdc positive poles, the C1 of electric capacity one, the S6 of switch module six, the D7 of diode seven, the L1 of inductance one, alternating current energy volume production
Generating apparatus Vac, the L2 of inductance two, the S5 of switch module five and DC energy generation device Vdc negative pole constitute current loop；Its electric current
Trend, as shown in Figure 5.
When the S1 of switch module one and the S5 switching tubes high frequency trigger signal of switch module five are all low, the S6 of switch module six,
The D7 of diode seven, the L1 of inductance one, AC energy generation device Vac, the L2 of inductance two, the D9 of diode nine and the S8 of switch module eight are successively
Constitute continuous current circuit；When the S1 of switch module one and the S5 high frequency trigger signals of switch module five are all low, the S2 of switch module two, electricity
Feel a L1, AC energy generation device Vac, the L2 of inductance two and the D3 of diode three constitute continuous current circuit successively；Its current trend, such as
Shown in Fig. 6.
Embodiment 3
Between the L1 of the inductance one and L2 of inductance two outboard end AC energy generation device Vac negative half-cycle, switch
The S3 of module three, the S6 of switch module six and the S9 of switch module nine are open-minded in whole positive half cycle；When the S1 of switch module one high frequency is triggered
When the high frequency trigger signal that signal is the S4 of high level Simultaneous Switching module four is low level, DC energy generation device Vdc is just
Pole, the S1 of switch module one, the S3 of switch module three, the L2 of inductance two, AC energy generation device Vac, the L1 of inductance one, diode seven
D7, the S6 of switch module six, the C2 of electric capacity two and DC energy generation device Vdc negative poles constitute current loop successively, its current trend,
As shown in Figure 7.
When the S1 of switch module one and the S4 of switch module four high frequency trigger signal are high level, the S1 of switch module one and switch
The S4 of module four is turned on, DC energy generation device Vdc positive pole, the S1 of switch module one, the S3 of switch module three, the L2 of inductance two, friendship
Stream energy generation device Vac, the L1 of inductance one, the S4 of switch module four and DC energy generation device Vdc negative poles constitute electric current successively
Loop, its current trend, as shown in Figure 8.
When the S1 of switch module one high frequency trigger signal is low level, the S4 trigger signals of Simultaneous Switching module four are high,
DC energy generation device Vdc positive poles, the C1 of electric capacity one, the D8 of diode eight, the S9 of switch module nine, the L2 of inductance two, alternating current energy volume production
Generating apparatus Vac, the L1 of inductance one, the S4 of switch module four and DC energy generation device Vdc negative pole constitute current loop, its electric current
Trend, as shown in Figure 9.
When the S1 of switch module one and the S4 of switch module four high frequency trigger signal are all low, the D8 of diode eight, switching molding
The S9 of block nine, the L2 of inductance two, AC energy generation device Vac, the L1 of inductance one, the D7 of diode seven and the S6 of switch module six are constituted successively
Continuous current circuit；When the S1 of switch module one and the S4 high frequency trigger signals of switch module four are all low, the S3 of switch module three, inductance two
L2, AC energy generation device Vac, the L1 of inductance one and the D2 of diode two constitute continuous current circuit successively, its current trend, such as Figure 10
It is shown.
In summary, multi-electrical level inverter of the invention is connected a switching tube in loop of power circuit, and in each bridge arm
It is middle to add two switching tubes and two diodes with bus capacitor midpoint so that no matter in positive half cycle or negative half period, two
Inductance works simultaneously, while inductance utilization rate is improved, improves DC electromagnetic interference problem；Due to drawing for current following device
Enter so that energy storage device is not involved in afterflow process, the current potential that 2 points of a, b current potential during afterflow keeps of substantially equal and inverse
2 potential change amounts of change state and freewheeling state a, b are smaller, and this reduces DC electromagnetic interference problems；Inversion in the present invention
Three switching tubes that device is used all make high frequency switching, and no matter this causes in positive-negative half-cycle, two filter inductances L1, L2 inner side
The current potential of terminals is all in high-frequency impulse, and its outer side terminal is civil power, and this improves the utilization rate of filter inductance；The present invention draws
The circuit entered, it is possible to achieve five level modes, two filter inductances L1, L2 can reduce, and improve overall efficiency；Meanwhile, by
The half for being Vdc in the voltage of main switch high frequency conversion, the switching loss reduction of main switch, and then also improve complete machine effect
Rate；Relative to traditional inverter circuit structure, the circuit improves the utilization rate of inductance, reduces free wheeling path, improves complete machine effect
Rate, while reducing the DC electromagnetic interference problems of machine so that the various aspects performance boost of inverter.
Claims (4)
1. multi-electrical level inverter, including DC energy generation device (Vdc), AC energy generation device (Vac), modulation circuit and
MCU, it is characterised in that also including inverter circuit, the inverter circuit include switch module one (S1), switch module two (S2),
Switch module three (S3), switch module four (S4), switch module five (S5), switch module six (S6), switch module seven (S7), open
Close module eight (S8), switch module nine (S9), diode one (D1), diode two (D2), diode three (D3), diode four
(D4), diode five (D5), diode six (D6), diode seven (D7), diode eight (D8), diode nine (D9), inductance one
(L1), inductance two (L2) and division module, the positive pole of the DC energy generation device (Vdc) respectively with division module, two poles
The input connection of the negative electrode of pipe one (D1) and switch module one (S1), the output end of switch module one (S1) respectively with switching molding
Input, the input of switch module three (S3), the anode of diode one (D1), the negative electrode of diode two (D2) of block two (S2)
And the negative electrode connection of diode three (D3), the output end of switch module two (S2) one end respectively with inductance one (L1), switching molding
The input of block four (S4), the output end of switch module seven (S7), the sun of the negative electrode of diode four (D4) and diode seven (D7)
Pole is connected, and the output end of switch module three (S3) one end respectively with inductance two (L2), the input of switch module five (S5), is opened
The anode connection of output end, the negative electrode of diode five (D5) and the diode nine (D9) of module nine (S9) is closed, inductance one (L1)
The other end is connected by AC energy generation device (Vac) with the other end of inductance two (L2), the input of switch module seven (S7)
The negative electrode of end input respectively with switch module six (S6), the negative electrode of diode seven (D7) and diode six (D6) is connected, and is opened
Close anode, the output end of switch module eight (S8), the diode eight of the output end of module six (S6) respectively with diode six (D6)
(D8) anode and division module connection, negative pole, the switch module of division module also respectively with DC energy generation device (Vdc)
Four (S4) output end, the output end of switch module five (S5), the anode of the anode of diode four (D4) and diode five (D5)
Connection, the input of switch module eight (S8) input respectively with switch module nine (S9), the negative electrode of diode eight (D8) and
The negative electrode connection of diode nine (D9), the control end of the switch module one (S1), the control end of switch module four (S4) and is opened
The control end for closing module five (S5) is connected by modulation circuit with MCU respectively, the control end of switch module two (S2), switch module
Three (S3) control end, the control end of switch module six (S6), the control end of switch module seven (S7), switch module eight (S8)
Control end and the control end of switch module nine (S9) are connected with MCU；
High-frequency pulse signal output end and power frequency pulse signal output end are provided with the MCU, for controlling switch module one
(S1), switch module two (S2), switch module three (S3), switch module four (S4), switch module five (S5), switch module six
(S6), the working condition of switch module seven (S7), switch module eight (S8) and switch module nine (S9)；
The modulation circuit, for the high-frequency pulse signal that exports MCU and sinusoidal signal modulation into the switching molding for driving
Block one (S1), switch module four (S4) and switch module five (S5) high frequency trigger signal；The sinusoidal signal is exchanged with described
The AC power same frequency and same-phase of energy producing unit (Vac)；
The division module, the input ripple for reducing inverter link, is additionally operable to bus partial pressure；The division module bag
Electric capacity one (C1) and electric capacity two (C2) are included, the positive pole of the electric capacity one (C1) connects with the positive pole of DC energy generation device (Vdc)
Connect, the negative pole of electric capacity one (C1) is connected with the anode of electric capacity two (C2) and the input of switch module six (S6) respectively, electric capacity two
(C2) negative pole is connected with the negative pole of DC energy generation device (Vdc).
2. multi-electrical level inverter according to claim 1, it is characterised in that the electric capacity one (C1) and electric capacity two (C2) point
Wei not bus capacitor.
3. multi-electrical level inverter according to claim 1, it is characterised in that the inductance one (L1) and inductance two (L2) are
Filter inductance.
4. multi-electrical level inverter according to claim 1, it is characterised in that the DC energy generation device (Vdc) is
Positive energy cell panel, wind energy battery or fuel cell.
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| CN201410505986.8A CN104218839B (en) | 2014-09-28 | 2014-09-28 | Multi-electrical level inverter |
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| CN104218839B true CN104218839B (en) | 2017-09-29 |
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| US4894621A (en) * | 1988-06-13 | 1990-01-16 | Westinghouse Electric Corp. | Circuit for five level waveform synthesis |
| DE102004030912B3 (en) * | 2004-06-25 | 2006-01-19 | Sma Technologie Ag | Method for converting a direct electrical voltage of a DC voltage source, in particular a photovoltaic DC voltage source into an AC voltage |
| EP2226926A1 (en) * | 2009-03-02 | 2010-09-08 | ABB Research Ltd. | Five-level inverter |
| TW201330480A (en) * | 2012-01-02 | 2013-07-16 | Univ Nat Cheng Kung | Self-balanced five-level inverter and method thereof |
| CN103312206A (en) * | 2013-07-01 | 2013-09-18 | 台州富凌电气有限公司 | Efficient inverter |
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