CN105450064B - A kind of multi-electrical level inverter - Google Patents
A kind of multi-electrical level inverter Download PDFInfo
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- CN105450064B CN105450064B CN201510969681.7A CN201510969681A CN105450064B CN 105450064 B CN105450064 B CN 105450064B CN 201510969681 A CN201510969681 A CN 201510969681A CN 105450064 B CN105450064 B CN 105450064B
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of multi-electrical level inverters, including：Power circuit, the first level control circuit and the first filter circuit；Power circuit, for providing DC voltage to the first level control circuit；First level control circuit, it is connect with power circuit, it is output to the first filter circuit for the DC voltage to be changed into after trapezoidal wave, specifically include the two-winding transformer of at least one coupled in reverse wi, first T-type bridge arm and the second T-type bridge arm, first T-type bridge arm is formed by connecting by the first cross-bridges arm and the first perpendicular bridge arm, second T-type bridge arm is formed by connecting by the second cross-bridges arm and the second perpendicular bridge arm, first cross-bridges arm is connect with the Same Name of Ends in the crosspoint of the first perpendicular bridge arm and the first winding of transformer, second cross-bridges arm is connect with the different name end in the crosspoint of the second perpendicular bridge arm and the second winding of transformer；First filter circuit is connect with the first level control circuit, for trapezoidal wave to be changed into sinewave output.Using the present invention, transfer efficiency can be improved.
Description
Technical field
The present invention relates to inverter field more particularly to a kind of multi-electrical level inverters.
Background technology
Inverter is a kind of device that direct current can be converted to alternating current, it is motor driving frequency converter, sensing heating
Device, uninterruptible power supply (UPS) and wind energy, photovoltaic, with the important composition in the grid-connected power generation systems such as fuel cell
Part.
Since two level topology inverter of conventional half-bridge realizes the side of two level Symmetricals at the inversion midpoint of transformer
Wave exports so that the harmonic wave of output voltage is larger after the filtered circuit of the square wave, to reduce the transfer efficiency of system.
Invention content
Technical problem to be solved of the embodiment of the present invention is, provides a kind of multi-electrical level inverter, can be in inverter
The inversion midpoint of transformer realize the output of more level trapezoidal waves, reduce the harmonic wave of output voltage after filtered circuit, to carry
The high transfer efficiency of system.
An embodiment of the present invention provides a kind of multi-electrical level inverter, the multi-electrical level inverter includes power circuit, first
Level control circuit and the first filter circuit, wherein：
The power circuit, for providing DC voltage to first level control circuit；
First level control circuit, connect with the power circuit, includes two windings of at least one coupled in reverse wi
Transformer and the first T-type bridge arm and the second T-type bridge arm, the first T-type bridge arm are connected by the first cross-bridges arm and the first perpendicular bridge arm
It forms, the second T-type bridge arm is formed by connecting by the second cross-bridges arm and the second perpendicular bridge arm, the first cross-bridges arm and described first
The crosspoint of perpendicular bridge arm is connect with the Same Name of Ends of the first winding of the two-winding transformer of the coupled in reverse wi, second cross-bridges
Arm is connect with the crosspoint of the described second perpendicular bridge arm with the different name end of the second winding of the two-winding transformer of the coupled in reverse wi,
First level control circuit is used to the DC voltage being changed into after the trapezoidal wave with multiple level values through described anti-
The tie point of the different name end of first winding of the two-winding transformer being coupled and the Same Name of Ends of the second winding is output to described the
One filter circuit；
First filter circuit, with the two-winding transformer of the coupled in reverse wi of first level control circuit
The different name end of first winding is connect with the tie point of the Same Name of Ends of the second winding, for that described will have the trapezoidal of multiple level values
Wave is changed into sinewave output.
Wherein optionally, the power circuit includes at least one input power, the first input filter capacitor and second
Input filter capacitor：
The anode of first input filter capacitor is connect with the anode of at least one input power, and described second is defeated
The cathode for entering filter capacitor is connect with the cathode of at least one input power；
The cathode of first input filter capacitor is connect with the anode of second input filter capacitor, and it is female to constitute direct current
Line midpoint.
Wherein optionally, the both ends of the described first perpendicular bridge arm are connected to the two poles of the earth of at least one input power,
One end of the first cross-bridges arm is connect with the DC bus midpoint, and the other end of the first cross-bridges arm is perpendicular with described first
Bridge arm connects, and the described first perpendicular bridge arm is divided into two up and down by the crosspoint of the first cross-bridges arm and the described first perpendicular bridge arm
Point；
The upper part of the first perpendicular bridge arm specifically includes the first power switch tube and the first body diode, and described first
The lower part of perpendicular bridge arm specifically includes the first power diode, and the first cross-bridges arm specifically includes the second power switch tube, the
Two body diodes and third power diode, the collector of first power switch tube respectively with first body diode
Cathode and the power circuit power supply anode connection, the emitter of first power switch tube is respectively with described first
The anode of body diode, the emitter of second power switch tube, the anode of second body diode and first work(
The cathode of rate diode connects, and the anode of first power diode is connected with the cathode of at least one input power,
The collector of second power switch tube respectively with the cathode of second body diode and the third power diode
Cathode connects, and the anode of the third power diode is connected with the DC bus midpoint；
The both ends of the second perpendicular bridge arm are connected to the two poles of the earth of at least one input power, second cross-bridges
One end of arm is connect with the DC bus midpoint, and the other end of the second cross-bridges arm is connect with the described second perpendicular bridge arm, institute
Described second perpendicular bridge arm is divide into upper part and lower part by the crosspoint for stating the second cross-bridges arm and the described second perpendicular bridge arm；
The upper part of the second perpendicular bridge arm specifically includes the second power diode, the lower part tool of the second perpendicular bridge arm
Body includes the 4th power switch tube and the 4th body diode, and the second cross-bridges arm specifically includes third power switch tube, the
Two body diodes and the 4th power diode, the cathode of second power diode and the power supply of the power circuit are just
Pole connects, the anode of second power diode respectively with the collector of the third power switch tube, the third body two
The cathode of pole pipe, the 4th power switch tube collector connected with the cathode of the 4th body diode, the third work(
The emitter of rate switching tube is connect with the anode of the anode of the third body diode and the 4th power diode respectively, institute
The cathode for stating the 4th power diode is connected with the DC bus midpoint, the emitter of the 4th power switch tube respectively with
The anode of 4th body diode is connected with the cathode of at least one input power.
Wherein optionally, first filter circuit includes output inductor, output filter capacitor and load：
One end of the output inductor is different with the first winding of the two-winding transformer of the coupled in reverse wi respectively
Name end connect with the Same Name of Ends of the second winding, composition inversion midpoint, the other end of the output inductor respectively with it is described defeated
The anode for going out filter capacitor is connected with one end of the load, the other end of the cathode of the output filter capacitor and the load
Connection.
Wherein optionally, four power switch tubes are driven by the first drive signal, the second drive signal, third respectively
Signal and fourth drive signal driving：
First drive signal is modulated by modulating wave and first carrier, and second drive signal is by the modulation
Wave and the second carrier modulation form, and the third drive signal is formed by the modulating wave and third carrier modulation, and the described 4th
Drive signal is formed by the modulating wave and the 4th carrier modulation；
The modulating wave is sine wave, the first carrier, second carrier wave, the third carrier wave and the described 4th
Carrier wave is triangular wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carry
The phase of wave differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree.
Wherein optionally, the duty ratio when first power switch tube in a switch periods more than 0 and is being less than
When 0.5 section, the level control circuit exports the first square wave to the filter circuit, and first square wave includes two kinds of electricity
Level values, described two level values include the voltage and 0 of 1/4 times of at least one input power；
When duty ratio of first power switch tube in a switch periods is in the section more than 0.5 and less than 1,
The level control circuit to the filter circuit export the second square wave, second square wave include two kinds of level values, described two
Kind level value includes the voltage and 1/2 times of at least one input power of 1/4 times of at least one input power
Voltage；
When duty ratio of the 4th power switch tube in a switch periods is in the section more than 0 and less than 0.5,
The level control circuit to the filter circuit export third square wave, the third square wave include two kinds of level values, described two
Kind level value includes the voltage and 0 of -1/4 times of at least one input power；
When duty ratio of the 4th power switch tube in a switch periods is in the section more than 0.5 and less than 1,
The level control circuit to the filter circuit export the 4th square wave, the 4th square wave include two kinds of level values, described two
Kind level value includes the voltage and -1/2 times of at least one input power of -1/4 times of at least one input power
Voltage.
Wherein optionally, the multi-electrical level inverter further includes second electrical level control circuit and the second filter circuit：
The second electrical level control circuit is consistent with the first level control circuit structure, second filter circuit with
First filter circuit construction is consistent, is exported after first filter circuit is in parallel with second filter circuit.
Wherein optionally, the multi-electrical level inverter includes the first to the 8th power switch tube, the described first to the 8th work(
Rate switching tube is driven by the first drive signal to the 8th drive signal respectively：
First drive signal is modulated by modulating wave and first carrier, and second drive signal is by the modulation
Wave and the second carrier modulation form, and the third drive signal is formed by the modulating wave and third carrier modulation, and the described 4th
Drive signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier wave
It modulates, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation, and the 7th drive signal is by institute
It states modulating wave and the 7th carrier modulation forms, the 8th drive signal is formed by the modulating wave and the 8th carrier modulation；
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave, the 6th carrier wave, the 7th carrier wave and the 8th carrier wave are triangular wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carry
The phase of wave differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, and the described 5th carries
The relatively described first carrier phase shift 180 degree of wave, the relatively described 5th phase-shifting carrier wave 180 degree of the 7th carrier wave, the described 6th carries
The phase of wave and the phase of the 7th carrier wave differ 180 degree, the phase of the phase and the 5th carrier wave of the 8th carrier wave
Differ 180 degree.
Wherein optionally, the multi-electrical level inverter further includes the 5th power switch tube, the 5th body diode, the 6th power
Switching tube and hexasomic diode：
The cathode of 5th body diode respectively with the anode of at least one input power and the 5th power
The collector of switching tube connects, the anode of the 5th body diode respectively with the emitter of the 5th power switch tube, institute
State the cathode of hexasomic diode, the collector of the 6th power switch tube and the output filter capacitor and the output
The other end of load connects, the anode of the hexasomic diode respectively with the emitter of the 6th power switch tube and described
The cathode of at least one input power connects.
Wherein optionally, the described first to the 6th power switch tube is driven by the first to the 6th drive signal respectively：
First drive signal is modulated by modulating wave and first carrier, and second drive signal is by the modulation
Wave and the second carrier modulation form, and the third drive signal is formed by the modulating wave and third carrier modulation, and the described 4th
Drive signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier wave
It modulates, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation；
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave and the 6th carrier wave are triangular wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carry
The phase of wave differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, and the described 5th carries
The relatively described first carrier phase shift 180 degree of wave, the phase of the 6th carrier wave and the phase of the 5th carrier wave differ 180 degree.
Wherein optionally, the multi-electrical level inverter further includes third level control circuit, the 4th level control circuit,
Three filter circuits and the 4th filter circuit：
The third level control circuit, the 4th level control circuit and the first level control circuit structure one
It causes, the third filter circuit, the 4th filter circuit are consistent with first filter circuit construction, the first output filter
Wave inductance realizes that A phases export by first output filter capacitor, and the third output inductor is defeated by the third
Go out filter capacitor and realize that B phases export, the 4th output inductor realizes that C phases are defeated by the 4th output filter capacitor
Go out.
Wherein optionally, described first to the 12nd power switch tube is driven by first to the 12nd drive signal respectively
It is dynamic：
First drive signal is modulated by modulating wave and first carrier, and second drive signal is by the modulation
Wave and the second carrier modulation form, and the third drive signal is formed by the modulating wave and third carrier modulation, and the described 4th
Drive signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier wave
It modulates, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation, and the 7th drive signal is by institute
It states modulating wave and the 7th carrier modulation forms, the 8th drive signal is formed by the modulating wave and the 8th carrier modulation, institute
It states the 9th drive signal to be formed by the modulating wave and the 9th carrier modulation, the tenth drive signal is by the modulating wave and
Ten carrier modulations form, and the 11st drive signal is formed by the modulating wave and the 11st carrier modulation, and the described 12nd
Drive signal is modulated by the modulating wave and the tenth nd carrier；
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave, the 6th carrier wave, the 7th carrier wave, the 8th carrier wave, the 9th carrier wave, the described tenth
Carrier wave, the 11st carrier wave and the tenth nd carrier are triangular wave；
The phase shift 180 degree of the relatively described first carrier of phase of the third carrier wave, the phase of second carrier wave
180 degree, the phase of the 4th carrier wave and the phase difference 180 of the first carrier are differed with the phase of the third carrier wave
Degree, relatively described 120 degree of the first carrier phase shift of the 5th carrier wave, relatively described 5th phase-shifting carrier wave 180 of the 7th carrier wave
The phase of degree, the phase of the 6th carrier wave and the 7th carrier wave differs 180 degree, the phase of the 8th carrier wave and described the
The phase of five carrier waves differs 180 degree, relatively described 120 degree of 5th phase-shifting carrier wave of the 9th carrier wave, the 11st carrier wave phase
To the 9th phase-shifting carrier wave 180 degree, the phase of the tenth carrier wave and the phase of the 11st carrier wave differ 180 degree, institute
State the phase of the tenth nd carrier and the phase difference 180 degree of the 9th carrier wave.
Implement the embodiment of the present invention, has the advantages that：By controlling the duty ratio of power switch tube, so that inversion
The inversion mid-point voltage of the transformer of device has multiple level values.In the prior art, inversion midpoint exports Symmetrical
Square wave so that the multifrequency sinusoid exported after the filtered circuit of the square wave is larger, reduces the transfer efficiency of system.And with it is existing
Technology is compared, and the present invention can export the trapezoidal wave with more level values at inversion midpoint so that the filtered electricity of the trapezoidal wave
It is easier to be changed into sine wave behind road, and output-voltage levels number is more, trapezoidal wave is just wirelessly close to sine wave, closer to sinusoidal
Wave output harmonic wave is also just smaller, higher to the transfer efficiency of system.Therefore using the present invention, the conversion effect of system can be improved
Rate.
Description of the drawings
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 technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of multi-electrical level inverter provided in an embodiment of the present invention；
Fig. 2 is a kind of topological circuit figure of multi-electrical level inverter provided in an embodiment of the present invention；
Fig. 3 is duty ratio in the embodiment of the present invention (D)<Power supply when 0.5 in the drive signal of sine wave positive half cycle, output
And the oscillogram of transformer excitation electric current；
Fig. 4 is duty ratio in the embodiment of the present invention (D)>Power supply when 0.5 in the drive signal of sine wave positive half cycle, output
And the oscillogram of transformer excitation electric current；
Fig. 5 is the topological circuit figure for the multi-electrical level inverter that another embodiment of the present invention provides；
Fig. 6 is the topological circuit figure for the multi-electrical level inverter that another embodiment of the present invention provides；
Fig. 7 is the topological circuit figure for the multi-electrical level inverter that another embodiment of the present invention provides.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Term " first ", " second " in description and claims of this specification and above-mentioned attached drawing etc. are for distinguishing
Different objects, rather than for describing particular order.In addition, term " comprising " and " having " and their any deformations, it is intended that
It is to cover and non-exclusive includes.Such as process, method, system, product or the equipment for containing series of steps or unit do not have
It is defined in the step of having listed or unit, but further includes the steps that optionally not listing or unit, or optionally also wrap
It includes for other intrinsic steps of these processes, method, product or equipment or unit.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
As depicted in figs. 1 and 2, Fig. 1 is a kind of structural schematic diagram of multi-electrical level inverter provided in an embodiment of the present invention, figure
2 be a kind of topological circuit figure of multi-electrical level inverter provided in an embodiment of the present invention.The circuit includes electricity combined with Figure 1 and Figure 2,
Source circuit 10, the first level control circuit 20 and the first filter circuit 30, wherein：
Power circuit 10, for providing DC voltage to the first level control circuit 20.Power circuit 10 wraps as shown in Figure 2
Include at least one input power Vin, the first input filter capacitor C1 and the second input filter capacitor C2, wherein
Anode and at least one input power V of first input filter capacitor C1inAnode connection, the second input filter electricity
Hold the cathode of C2 and at least one input power VinCathode connection.The cathode of first input filter capacitor C1 and the second input are filtered
The anode connection of wave capacitance C2, constitutes DC bus midpoint 0.
First level control circuit 20 is connect with power circuit 10 and the first filter circuit 30, including at least one anti-
The two-winding transformer T1 and the first T-type bridge arm that are coupled and the second T-type bridge arm, the first T-type bridge arm is by the first cross-bridges arm and
One perpendicular bridge arm is formed by connecting, and the second T-type bridge arm is formed by connecting by the second cross-bridges arm and the second perpendicular bridge arm, the first cross-bridges arm and first
The Same Name of Ends of the first winding of the crosspoint of perpendicular bridge arm and the two-winding transformer T1 of coupled in reverse wi connects, the second cross-bridges arm and the
The different name end of the second winding of the crosspoint of two perpendicular bridge arms and the two-winding transformer T1 of coupled in reverse wi connects, the control of the first level
20 circuits are used to DC voltage being changed into the two winding transformations through the coupled in reverse wi after the trapezoidal wave with multiple level values
The different name end of the first winding of device T1 and the tie point a of the Same Name of Ends of the second winding are output to the first filter circuit 30.
The both ends of first perpendicular bridge arm are connected at least one input power VinThe two poles of the earth, one end of the first cross-bridges arm with
DC bus midpoint 0 connects, and the other end of the first cross-bridges arm connect with the first perpendicular bridge arm, the first cross-bridges arm and the first perpendicular bridge arm
First perpendicular bridge arm is divide into upper part and lower part by crosspoint b.
The upper part of first perpendicular bridge arm specifically includes the first power switch tube S 1 and the first body diode D1, the first perpendicular bridge
The lower part of arm specifically includes the first power diode D5, and the first cross-bridges arm specifically includes the second power switch tube S 2, the second body
Diode D2 and third power diode D7.Wherein, the collector of the first power switch tube S 1 respectively with the first body diode
The anode connection of the cathode of D1 and the power supply of power circuit, the emitter of the first power switch tube S 1 respectively with the first body diode
The moon of the anode of D1, the emitter of the second power switch tube S 2, the anode of the second body diode D2 and the first power diode D5
Pole connects, and the anode of the first power diode D5 is connected with the cathode of at least one input power, the second power switch tube S 2
Collector is connect with the cathode of the cathode of the second body diode D2 and third power diode D7 respectively, third power diode D7
Anode connected with DC bus midpoint.
The both ends of second perpendicular bridge arm are connected to the two poles of the earth of at least one input power, one end of the second cross-bridges arm
It is connect with DC bus midpoint, the other end of the second cross-bridges arm is connect with the second perpendicular bridge arm, the second cross-bridges arm and the second perpendicular bridge arm
Crosspoint the second perpendicular bridge arm is divide into upper part and lower part, the upper part of the second perpendicular bridge arm specifically includes the second power diode
The lower part of D6, the second perpendicular bridge arm specifically include the 4th power switch tube S 4 and the 4th body diode D4, the second cross-bridges arm tool
Body includes third power switch tube S 3, the second body diode D3 and the 4th power diode D8.Wherein, the second power diode
The anode connection of the cathode of D6 and the power supply of power circuit, the anode of the second power diode D6 respectively with third power switch tube
The collector of S3, the cathode of third body diode D3, the 4th power switch tube S 4 collector and the 4th body diode D4 the moon
Pole connects, the emitter of third power switch tube S 3 respectively with the anode of third body diode D3 and the 4th power diode D8
Anode connects, and the cathode of the 4th power diode D8 is connected with DC bus midpoint, the emitter point of the 4th power switch tube S 4
It is not connect with the cathode of the anode of the 4th body diode D4 and at least one input power.
First filter circuit 30, with the first of the two-winding transformer T1 of the coupled in reverse wi of the first level control circuit 20 around
The different name end of group is connect with the tie point a of the Same Name of Ends of the second winding, for turning the trapezoidal wave with multiple level values
Become sinewave output.First filter circuit 30 as shown in Fig. 2, including output inductor L1, output filter capacitor C3 and
Load R1.Wherein, one end of output inductor L1 is different with the first winding of the two-winding transformer T1 of coupled in reverse wi respectively
Name end is connected with the Same Name of Ends of the second winding, constitutes inversion midpoint, and the other end of output inductor L1 is filtered with output respectively
The anode of capacitance C3 is connected with one end of load R1, and the cathode of output filter capacitor C3 is connected with the other end of load R1.
It is complete to a kind of operation principle progress one of multi-electrical level inverter provided in an embodiment of the present invention with reference to Fig. 2
Description.
Described four power switch tube Ss 1, S2, S3, S4 are driven by the first drive signal, the second drive signal, third respectively
Signal and fourth drive signal driving.Wherein, first drive signal is modulated by modulating wave and first carrier, described
Second drive signal is formed by the modulating wave and the second carrier modulation, and the third drive signal is by the modulating wave and third
Carrier modulation forms, and the fourth drive signal is formed by the modulating wave and the 4th carrier modulation.And the modulating wave is just
String wave, the first carrier, second carrier wave, the third carrier wave and the 4th carrier wave are triangular wave, the third
The phase difference 180 of the relatively described first carrier phase shift 180 degree of carrier wave, the phase of second carrier wave and the third carrier wave
Degree, the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree.VbcFor two winding terminal electricity of transformer T1
Pressure, and Va0For inversion mid-point voltage.If the duty ratio of S1, S4 are D, 0 point of ground connection, input supply voltage Vin, output voltage is
Vout。
When duty ratio of first power switch tube S 1 in a switch periods is in the section more than 0 and less than 0.5
When, the level control circuit exports the first square wave to the filter circuit, and first square wave includes two kinds of level values, described
Two kinds of level values include the voltage and 0 of 1/4 times of at least one input power.
Specifically, working as D<When 0.5, in a complete switching cycles, there are four Working moulds for the multi-electrical level inverter tool
State, as shown in Figure 3.
It is operation mode 1, power switch tube S 1, S2, S3 conducting within t0~t1 periods.Although S2 has been turned on,
And without flow through electric current.It is input voltage V that " b ", which puts current potential,inAnode, " c " point current potential be DC bus midpoint 0, therefore reverse phase coupling
Close the both end voltage V of transformer T1bc=Vin/ 2, and the midpoint " a " that coupled in reverse wi transformer T1 is connect with output inductor is arrived
The voltage V at DC bus midpoint " 0 "a0For+Vin/4。
It is operation mode 2, power switch tube S 2, S3 conductings, while power diode D7, D8 within t1~t2 periods
Afterflow water conservancy diversion." b " point current potential is DC bus midpoint, " c " point current potential is also DC bus midpoint, therefore coupled in reverse wi transformer
The both end voltage V of T1bc=0, meanwhile, inversion mid-point voltage Va0=0.
It is operation mode 3 within t2~t3 periods, power switch tube S 2 is connected, while power diode D6, D7 afterflow
Conducting." b " point voltage is DC bus midpoint, " c " point voltage is input voltage VinAnode, therefore coupled in reverse wi transformer T1
Both end voltage Vbc=-Vin/ 2, meanwhile, inversion mid-point voltage Va0=+Vin/4。
It is operation mode 4, power switch tube S 2, S3 conductings, while power diode D7, D8 within t3~t4 periods
Afterflow water conservancy diversion." b " point current potential is DC bus midpoint, " c " point current potential is also DC bus midpoint, therefore coupled in reverse wi transformer
The both end voltage V of T1bc=0, meanwhile, inversion mid-point voltage Va0=0.
When duty ratio of first power switch tube S 1 in a switch periods is in the section more than 0.5 and less than 1
When, the level control circuit exports the second square wave to the filter circuit, and second square wave includes two kinds of level values, described
Two kinds of level values include the voltage and 1/2 times of at least one input power of 1/4 times of at least one input power
Voltage.
Specifically, working as D>When 0.5, in a complete switching cycles, the multi-electrical level inverter there are four operation mode,
As shown in Figure 4.
It is operation mode 1, power switch tube S 1, S2 conductings, power diode D6 afterflows conducting within t0~t1 periods.
Although S2 has been turned on, and without flow through electric current.It is input supply voltage V that " b ", which puts current potential, at this timeinAnode, " c " put current potential
For input supply voltage VinAnode, therefore the both end voltage V of coupled in reverse wi transformer T1bc=0, meanwhile, Va0=+Vin/2。
It is operation mode 2, power switch tube S 1, S2, S3 conducting within t1~t2 periods.Although S2 has been turned on,
And without flow through electric current.It is input supply voltage V that " b ", which puts current potential, at this timeinAnode, " c " point current potential be DC bus midpoint 0, because
The both end voltage V of this coupled in reverse wi transformer T1bc=+Vin/ 2, meanwhile, Va0=+Vin/4。
It is operation mode 3, power switch tube S 1, S2 conductings, power diode D6 afterflows conducting within t2~t3 periods.
Although S2 has been turned on, and without flow through electric current.It is input voltage V that " b ", which puts current potential,inAnode, " c " point current potential also be input electricity
Press VinAnode, therefore the both end voltage V of coupled in reverse wi transformer T1bc=0, meanwhile, Va0=Vin/2。
It is operation mode 4 within t3~t4 periods, power switch tube S 2 is connected, while power diode D6, D7 afterflow
Conducting." b " point voltage is DC bus midpoint, " c " point voltage is input voltage VinAnode, therefore coupled in reverse wi transformer T1
Both end voltage Vbc=-Vin/ 2, meanwhile, Va0=+Vin/4。
When duty ratio of the 4th power switch tube S 4 in a switch periods is in the section more than 0 and less than 0.5
When, the level control circuit exports third square wave to the filter circuit, and the third square wave includes two kinds of level values, described
Two kinds of level values include the voltage and 0 of -1/4 times of at least one input power.
Specifically, as the duty ratio D of S4<When 0.5, inversion midpoint is exportable 0, -1/4VinTwo kinds of level values.With S1's
Duty ratio D<Principle is similar when 0.5, and details are not described herein again.
When duty ratio of the 4th power switch tube S 4 in a switch periods is in the section more than 0.5 and less than 1
When, the level control circuit exports the 4th square wave to the filter circuit, and the 4th square wave includes two kinds of level values, described
Two kinds of level values include the voltage and -1/2 times of at least one input electricity of -1/4 times of at least one input power
The voltage in source.
Specifically, as the duty ratio D of S4>When 0.5, in the exportable -1/4V in inversion midpointin、-1/2VinTwo kinds of level values.
With the duty ratio D of S1>Principle is similar when 0.5, and details are not described herein again.
Therefore, Va0Finally achievable 1/4Vin、1/2Vin、0、-1/4Vin、-1/2VinFive kinds of level, in VoutEnd output
There are five types of level values for sine wave tool.
By controlling the duty ratio of power switch tube, so that the inversion mid-point voltage of the transformer of inverter has multiple electricity
Level values so that in trapezoidal wave of the inversion midpoint output with more level values, be easier after the filtered circuit of the trapezoidal wave
It is changed into sine wave, and output-voltage levels number is more, trapezoidal wave is just closer to sine wave, closer to sinewave output harmonic wave
With regard to smaller, so as to improve the transfer efficiency of system.
Fig. 5 is the structural schematic diagram of the multi-electrical level inverter in another embodiment of the present invention, as shown in figure 5, described mostly electric
Flat inverter includes power circuit 10, the first level control circuit 20 and the first filter circuit 30 in previous embodiment,
In the present embodiment, the multi-electrical level inverter further includes second electrical level control circuit 40 and the second filter circuit 50.
The second electrical level control circuit 40 is consistent with 20 structure of the first level control circuit, second filtered electrical
Road 50 is consistent with 30 structure of the first filter circuit, after first filter circuit 30 is in parallel with second filter circuit 50
Output.
The multi-electrical level inverter includes first to the 8th 1~S8 of power switch tube S, the described first to the 8th power switch
Pipe is driven by the first drive signal to the 8th drive signal respectively.Wherein, first drive signal is carried by modulating wave and first
Wave is modulated, and second drive signal is formed by the modulating wave and the second carrier modulation, the third drive signal by
The modulating wave and third carrier modulation form, and the fourth drive signal is formed by the modulating wave and the 4th carrier modulation,
5th drive signal is formed by the modulating wave and the 5th carrier modulation, the 6th drive signal by the modulating wave and
6th carrier modulation forms, and the 7th drive signal is formed by the modulating wave and the 7th carrier modulation, the 8th driving
Signal is formed by the modulating wave and the 8th carrier modulation.
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave, the 6th carrier wave, the 7th carrier wave and the 8th carrier wave are triangular wave.It needs to illustrate
It is the relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of the phase of second carrier wave and the third carrier wave
Position difference 180 degree, the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, and the 5th carrier wave is opposite
The first carrier phase shift 180 degree, the relatively described 5th phase-shifting carrier wave 180 degree of the 7th carrier wave, the phase of the 6th carrier wave
The phase of position and the 7th carrier wave differs 180 degree, the phase of the 8th carrier wave and the phase difference 180 of the 5th carrier wave
Degree.
In the inversion mid-point voltage V of T1, T2a10、Va20It is respectively provided with+1/4Vin、1/2Vin、0、-1/4Vin、-1/2VinFive kinds
In V after level, first filter circuit and the second filter circuit Parallel opertationoutThe sine wave at end has Vin、+3/
4Vin、+1/2Vin、+1/4Vin、0、-1/4Vin、-1/2Vin、-3/4Vin、VinNine kinds of level.
By controlling the duty ratio of power switch tube, so that the inversion mid-point voltage of the transformer of inverter has multiple electricity
Level values so that in trapezoidal wave of the inversion midpoint output with more level values, be easier after the filtered circuit of the trapezoidal wave
It is changed into sine wave, and output-voltage levels number is more, trapezoidal wave is just closer to sine wave, closer to sinewave output harmonic wave
With regard to smaller, so as to improve the transfer efficiency of system.
Fig. 6 is the structural schematic diagram for the multi-electrical level inverter that another embodiment of the present invention provides, as shown in fig. 6, described more
Electrical level inverter includes power circuit 10, the first level control circuit 20, the first filter circuit 30 in previous embodiment.At this
In embodiment, the multi-electrical level inverter further includes the 5th power switch tube S 5, the 5th body diode D5, the 6th power switch tube
S6 and hexasomic diode D6.
The cathode of the 5th body diode D5 respectively with the anode of at least one input power and the 5th work(
The collector of rate switching tube S5 connects, the anode of the 5th body diode D5 hair with the 5th power switch tube S 5 respectively
Emitter-base bandgap grading, the cathode of the hexasomic diode D6, the collector of the 6th power switch tube S 6 and the output filter capacitor
And the other end connection of the output loading, the anode of the hexasomic diode respectively with the 6th power switch tube
Emitter is connected with the cathode of at least one input power.
Described first to the 6th power switch tube is driven by the first to the 6th drive signal respectively.Wherein, it described first drives
Dynamic signal is modulated by modulating wave and first carrier, second drive signal by the modulating wave and the second carrier modulation and
At the third drive signal is formed by the modulating wave and third carrier modulation, and the fourth drive signal is by the modulation
Wave and the 4th carrier modulation form, and the 5th drive signal is formed by the modulating wave and the 5th carrier modulation, and the described 6th
Drive signal is formed by the modulating wave and the 6th carrier modulation.
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave and the 6th carrier wave are triangular wave.It should be noted that the third carrier wave relatively described first
The phase of phase-shifting carrier wave 180 degree, the phase of second carrier wave and the third carrier wave differs 180 degree, the 4th carrier wave
Phase and the phase of the first carrier differ 180 degree, and the relatively described first carrier phase shift 180 degree of the 5th carrier wave is described
The phase of 6th carrier wave and the phase of the 5th carrier wave differ 180 degree.
The inversion mid-point voltage V of T1a0With+1/4Vin、1/2Vin、0、-1/4Vin、-1/2VinFive kinds of level, and loading
Other end Vd0With 1/2VinWith -1/2VinTwo kinds of level, in V after the first filter circuit Parallel opertationoutEnd is just
String wave has Vin、+3/4Vin、+1/2Vin、+1/4Vin、0、-1/4Vin、-1/2Vin、-3/4Vin、VinNine kinds of level.
By controlling the duty ratio of power switch tube, so that the inversion mid-point voltage of the transformer of inverter has multiple electricity
Level values so that in trapezoidal wave of the inversion midpoint output with more level values, be easier after the filtered circuit of the trapezoidal wave
It is changed into sine wave, and output-voltage levels number is more, trapezoidal wave is just closer to sine wave, closer to sinewave output harmonic wave
With regard to smaller, so as to improve the transfer efficiency of system.
Fig. 7 is the structural schematic diagram for the multi-electrical level inverter that another embodiment of the present invention provides, as shown in fig. 7, described more
Electrical level inverter includes power circuit 10, the first level control circuit 20 and the first filter circuit 30 in previous embodiment.
In the present embodiment, the multi-electrical level inverter further includes third level control circuit, the 4th level control circuit, third filtering
Circuit and the 4th filter circuit.
The third level control circuit, the 4th level control circuit and 20 structure of the first level control circuit
Unanimously, the third filter circuit, the 4th filter circuit are consistent with 30 structure of the first filter circuit.
First output inductor realizes that A phases export by first output filter capacitor, the third output
Filter inductance realizes that B phases export by the third output filter capacitor, and the 4th output inductor passes through the described 4th
Output filter capacitor realizes that C phases export.
Described first to the 12nd power switch tube is driven by first to the 12nd drive signal respectively.Wherein, institute
It states the first drive signal to be modulated by modulating wave and first carrier, second drive signal is carried by the modulating wave and second
Wave is modulated, and the third drive signal is formed by the modulating wave and third carrier modulation, the fourth drive signal by
The modulating wave and the 4th carrier modulation form, and the 5th drive signal is formed by the modulating wave and the 5th carrier modulation,
6th drive signal is formed by the modulating wave and the 6th carrier modulation, the 7th drive signal by the modulating wave and
7th carrier modulation forms, and the 8th drive signal is formed by the modulating wave and the 8th carrier modulation, the 9th driving
Signal is formed by the modulating wave and the 9th carrier modulation, and the tenth drive signal is by the modulating wave and the tenth carrier modulation
Form, the 11st drive signal is formed by the modulating wave and the 11st carrier modulation, the tenth two driving signal by
The modulating wave and the tenth nd carrier are modulated.
The modulating wave is sine wave, and the first carrier, second carrier wave, the third carrier wave, the described 4th carry
Wave, the 5th carrier wave, the 6th carrier wave, the 7th carrier wave, the 8th carrier wave, the 9th carrier wave, the described tenth
Carrier wave, the 11st carrier wave and the tenth nd carrier are triangular wave.It should be noted that the phase of the third carrier wave
The phase difference 180 of the phase shift 180 degree of the relatively described first carrier, the phase of second carrier wave and the third carrier wave
Degree, the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, and the 5th carrier wave relatively described first carries
120 degree of wave phase shift, the relatively described 5th phase-shifting carrier wave 180 degree of the 7th carrier wave, the phase of the 6th carrier wave and described
The phases of seven carrier waves differs 180 degree, and the phase of the 8th carrier wave and the phase of the 5th carrier wave differ 180 degree, and described the
Relatively described 120 degree of 5th phase-shifting carrier wave of nine carrier waves, the relatively described 9th phase-shifting carrier wave 180 degree of the 11st carrier wave are described
The phase of tenth carrier wave and the phase of the 11st carrier wave differ 180 degree, the phase and the described 9th of the tenth nd carrier
The phase of carrier wave differs 180 degree.
In the inversion mid-point voltage V of T1, T3, T4a10Va30、Va40It is respectively provided with+1/4Vin、1/2Vin、0、-1/4Vin、-1/
2VinFive kinds of level realize A phase, B phase, C phase simultaneously after the first filter circuit, the second filter circuit, third filter circuit respectively
Output.
By controlling the duty ratio of power switch tube, so that the inversion mid-point voltage of the transformer of inverter has multiple electricity
Level values.In the prior art, inversion midpoint exports the square wave of a Symmetrical so that is exported just after the filtered circuit of the square wave
String wave harmonic wave is larger, reduces the transfer efficiency of system.And compared with prior art, the present invention can export at inversion midpoint to be had
There is the trapezoidal wave of more level values so that be easier to be changed into sine wave, and output voltage electricity after the filtered circuit of the trapezoidal wave
Flat number is more, and trapezoidal wave is also just smaller closer to sinewave output harmonic wave just wirelessly close to sine wave, is imitated to the conversion of system
Rate is higher.Meanwhile using the present invention, it can also realize that three-phase exports simultaneously, substantially increase the transfer efficiency of system.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (8)
1. a kind of multi-electrical level inverter, which is characterized in that the multi-electrical level inverter includes power circuit, the first level control electricity
Road and the first filter circuit, wherein：
The power circuit, for providing DC voltage to first level control circuit；
First level control circuit, connect with the power circuit, includes two winding transformations of at least one coupled in reverse wi
Device and the first T-type bridge arm and the second T-type bridge arm, the first T-type bridge arm are formed by connecting by the first cross-bridges arm and the first perpendicular bridge arm,
The second T-type bridge arm is formed by connecting by the second cross-bridges arm and the second perpendicular bridge arm, the first cross-bridges arm and the described first perpendicular bridge
The crosspoint of arm is connect with the Same Name of Ends of the first winding of the two-winding transformer of the coupled in reverse wi, the second cross-bridges arm with
The crosspoint of the second perpendicular bridge arm is connect with the different name end of the second winding of the two-winding transformer of the coupled in reverse wi, described
First level control circuit is for being changed into the DC voltage after the trapezoidal wave with multiple level values through the reverse phase coupling
The tie point of the different name end of first winding of the two-winding transformer of conjunction and the Same Name of Ends of the second winding is output to first filter
Wave circuit；
First filter circuit, first with the two-winding transformer of the coupled in reverse wi of first level control circuit
The different name end of winding is connect with the tie point of the Same Name of Ends of the second winding, for turning the trapezoidal wave with multiple level values
Become sinewave output；
The power circuit includes at least one input power, the first input filter capacitor and the second input filter capacitor,
In：
The anode of first input filter capacitor is connect with the anode of at least one input power, the second input filter
The cathode of wave capacitance is connect with the cathode of at least one input power；
The cathode of first input filter capacitor is connect with the anode of second input filter capacitor, is constituted in DC bus
Point；
The both ends of the first perpendicular bridge arm are connected to the two poles of the earth of at least one input power, the first cross-bridges arm
One end is connect with the DC bus midpoint, and the other end of the first cross-bridges arm is connect with the described first perpendicular bridge arm, and described
Described first perpendicular bridge arm is divide into upper part and lower part by the crosspoint of one cross-bridges arm and the described first perpendicular bridge arm；
The upper part of the first perpendicular bridge arm specifically includes the first power switch tube and the first body diode, the first perpendicular bridge
The lower part of arm specifically includes the first power diode, and the first cross-bridges arm specifically includes the second power switch tube, the second body
Diode and third power diode, the collector of first power switch tube the moon with first body diode respectively
The anode connection of the power supply of pole and the power circuit, the emitter of first power switch tube respectively with first body two
The anode of pole pipe, the emitter of second power switch tube, the anode of second body diode and first power two
The cathode of pole pipe connects, and the anode of first power diode is connected with the cathode of at least one input power, described
The collector of the second power switch tube cathode with the cathode of second body diode and the third power diode respectively
Connection, the anode of the third power diode are connected with the DC bus midpoint；
The both ends of the second perpendicular bridge arm are connected to the two poles of the earth of at least one input power, the second cross-bridges arm
One end is connect with the DC bus midpoint, and the other end of the second cross-bridges arm is connect with the described second perpendicular bridge arm, and described
Described second perpendicular bridge arm is divide into upper part and lower part by the crosspoint of two cross-bridges arms and the described second perpendicular bridge arm；
The upper part of the second perpendicular bridge arm specifically includes the second power diode, and the lower part of the second perpendicular bridge arm is specifically wrapped
The 4th power switch tube and the 4th body diode are included, the second cross-bridges arm specifically includes third power switch tube, third body
The anode of diode and the 4th power diode, the cathode of second power diode and the power supply of the power circuit is even
Connect, the anode of second power diode respectively with the collector of the third power switch tube, the third body diode
Cathode, the 4th power switch tube collector connected with the cathode of the 4th body diode, the third power is opened
The emitter for closing pipe is connect with the anode of the anode of the third body diode and the 4th power diode respectively, and described the
The cathode of four power diodes is connected with the DC bus midpoint, the emitter of the 4th power switch tube respectively with it is described
The anode of 4th body diode is connected with the cathode of at least one input power；
Four power switch tubes are respectively by the first drive signal, the second drive signal, third drive signal and 4 wheel driven
Dynamic signal driving, wherein：
First drive signal is modulated by modulating wave and first carrier, second drive signal by the modulating wave and
Second carrier modulation forms, and the third drive signal is formed by the modulating wave and third carrier modulation, the 4th driving
Signal is formed by the modulating wave and the 4th carrier modulation；
The modulating wave is sine wave, the first carrier, second carrier wave, the third carrier wave and the 4th carrier wave
For triangular wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carrier wave
Phase differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree；
It is described when duty ratio of first power switch tube in a switch periods is in the section more than 0 and less than 0.5
Level control circuit exports the first square wave to the filter circuit, and first square wave includes two kinds of level values, described two electricity
Level values include the voltage and 0 of 1/4 times of at least one input power；
It is described when duty ratio of first power switch tube in a switch periods is in the section more than 0.5 and less than 1
Level control circuit exports the second square wave to the filter circuit, and second square wave includes two kinds of level values, described two electricity
Level values include the voltage of the voltage and 1/2 times of at least one input power of 1/4 times of at least one input power；
It is described when duty ratio of the 4th power switch tube in a switch periods is in the section more than 0 and less than 0.5
Level control circuit exports third square wave to the filter circuit, and the third square wave includes two kinds of level values, described two electricity
Level values include the voltage and 0 of -1/4 times of at least one input power；
It is described when duty ratio of the 4th power switch tube in a switch periods is in the section more than 0.5 and less than 1
Level control circuit exports the 4th square wave to the filter circuit, and the 4th square wave includes two kinds of level values, described two electricity
Level values include the electricity of the voltage and -1/2 times of at least one input power of -1/4 times of at least one input power
Pressure.
2. multi-electrical level inverter as described in claim 1, which is characterized in that first filter circuit includes output filtered electrical
Sense, output filter capacitor and load, wherein：
One end of output inductor different name end with the first winding of the two-winding transformer of the coupled in reverse wi respectively
It is connected with the Same Name of Ends of the second winding, constitutes inversion midpoint, the other end of the output inductor is filtered with the output respectively
The anode of wave capacitance is connected with one end of the load, and the other end of the cathode of the output filter capacitor and the load connects
It connects.
3. multi-electrical level inverter as described in claim 1, which is characterized in that the multi-electrical level inverter further includes second electrical level
Control circuit and the second filter circuit, wherein：
The second electrical level control circuit is consistent with the first level control circuit structure, second filter circuit with it is described
First filter circuit construction is consistent, is exported after first filter circuit is in parallel with second filter circuit.
4. multi-electrical level inverter as claimed in claim 3, which is characterized in that the multi-electrical level inverter includes first to the 8th
Power switch tube, the described first to the 8th power switch tube are driven by the first drive signal to the 8th drive signal respectively, wherein：
First drive signal is modulated by modulating wave and first carrier, second drive signal by the modulating wave and
Second carrier modulation forms, and the third drive signal is formed by the modulating wave and third carrier modulation, the 4th driving
Signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier modulation
It forms, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation, and the 7th drive signal is by the tune
Wave processed and the 7th carrier modulation form, and the 8th drive signal is formed by the modulating wave and the 8th carrier modulation；
The modulating wave is sine wave, the first carrier, second carrier wave, the third carrier wave, the 4th carrier wave, institute
It is triangular wave to state the 5th carrier wave, the 6th carrier wave, the 7th carrier wave and the 8th carrier wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carrier wave
Phase differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, the 5th carrier wave phase
To the first carrier phase shift 180 degree, the relatively described 5th phase-shifting carrier wave 180 degree of the 7th carrier wave, the 6th carrier wave
Phase and the phase of the 7th carrier wave differ 180 degree, the phase of the 8th carrier wave and the phase difference of the 5th carrier wave
180 degree.
5. multi-electrical level inverter as claimed in claim 2, which is characterized in that the multi-electrical level inverter further includes the 5th power
Switching tube, the 5th body diode, the 6th power switch tube and hexasomic diode, wherein：
The cathode of 5th body diode respectively with the anode of at least one input power and the 5th power switch
The collector of pipe connects, the anode of the 5th body diode respectively with the emitter of the 5th power switch tube, described the
The cathode of hexasomic diode, the collector of the 6th power switch tube and the output filter capacitor and the load it is another
One end connects, the anode of the hexasomic diode respectively with the emitter of the 6th power switch tube and described at least one
The cathode of input power connects.
6. multi-electrical level inverter as claimed in claim 5, which is characterized in that the described first to the 6th power switch tube respectively by
First to the 6th drive signal drives, wherein：
First drive signal is modulated by modulating wave and first carrier, second drive signal by the modulating wave and
Second carrier modulation forms, and the third drive signal is formed by the modulating wave and third carrier modulation, the 4th driving
Signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier modulation
It forms, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation；
The modulating wave is sine wave, the first carrier, second carrier wave, the third carrier wave, the 4th carrier wave, institute
It is triangular wave to state the 5th carrier wave and the 6th carrier wave；
The relatively described first carrier phase shift 180 degree of the third carrier wave, the phase of second carrier wave and the third carrier wave
Phase differs 180 degree, and the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, the 5th carrier wave phase
To the first carrier phase shift 180 degree, the phase of the 6th carrier wave and the phase of the 5th carrier wave differ 180 degree.
7. multi-electrical level inverter as claimed in claim 2, which is characterized in that the multi-electrical level inverter further includes third level
Control circuit, the 4th level control circuit, third filter circuit and the 4th filter circuit, wherein：
The third level control circuit, the 4th level control circuit are consistent with the first level control circuit structure,
The third filter circuit, the 4th filter circuit are consistent with first filter circuit construction, the first output inductor
Realize that A phases export by the first output filter capacitor, third output inductor realizes that B phases are defeated by third output filter capacitor
Go out, the 4th output inductor realizes that C phases export by the 4th output filter capacitor.
8. multi-electrical level inverter as claimed in claim 7, which is characterized in that first to the 12nd power switch tube respectively by
First to the 12nd drive signal driving, wherein：
First drive signal is modulated by modulating wave and first carrier, second drive signal by the modulating wave and
Second carrier modulation forms, and the third drive signal is formed by the modulating wave and third carrier modulation, the 4th driving
Signal is formed by the modulating wave and the 4th carrier modulation, and the 5th drive signal is by the modulating wave and the 5th carrier modulation
It forms, the 6th drive signal is formed by the modulating wave and the 6th carrier modulation, and the 7th drive signal is by the tune
Wave processed and the 7th carrier modulation form, and the 8th drive signal is formed by the modulating wave and the 8th carrier modulation, and described
Nine drive signals are formed by the modulating wave and the 9th carrier modulation, and the tenth drive signal is carried by the modulating wave and the tenth
Wave is modulated, and the 11st drive signal is formed by the modulating wave and the 11st carrier modulation, the 12nd driving
Signal is modulated by the modulating wave and the tenth nd carrier；
The modulating wave is sine wave, the first carrier, second carrier wave, the third carrier wave, the 4th carrier wave, institute
State the 5th carrier wave, the 6th carrier wave, the 7th carrier wave, the 8th carrier wave, the 9th carrier wave, the tenth carrier wave,
11st carrier wave and the tenth nd carrier are triangular wave；
The phase shift 180 degree of the relatively described first carrier of phase of the third carrier wave, the phase of second carrier wave and institute
The phase difference 180 degree of third carrier wave is stated, the phase of the 4th carrier wave and the phase of the first carrier differ 180 degree, institute
State relatively described 120 degree of the first carrier phase shift of the 5th carrier wave, the relatively described 5th phase-shifting carrier wave 180 degree of the 7th carrier wave, institute
The phase of the 6th carrier wave and the phase difference 180 degree of the 7th carrier wave are stated, the phase of the 8th carrier wave and the described 5th carries
The phase of wave differs 180 degree, and relatively described 120 degree of 5th phase-shifting carrier wave of the 9th carrier wave, the 11st carrier wave is with respect to institute
State the 9th phase-shifting carrier wave 180 degree, the phase of the tenth carrier wave and the phase of the 11st carrier wave differ 180 degree, and described the
The phase of ten nd carriers and the phase of the 9th carrier wave differ 180 degree.
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| CN109660141A (en) * | 2018-12-27 | 2019-04-19 | 杭州禾迈电力电子技术有限公司 | Five level inverse conversion topological circuits of one kind and five-electrical level inverter |
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| JP2012055083A (en) * | 2010-09-01 | 2012-03-15 | Meidensha Corp | Power conversion apparatus |
| CN103368427A (en) * | 2012-04-05 | 2013-10-23 | 艾默生网络能源有限公司 | Single-phase inverter and system thereof and three-phase inverter and system thereof |
| CN103346690B (en) * | 2013-07-05 | 2016-03-30 | 华为技术有限公司 | A kind of multi-electrical level inverter and electric power system |
| CN104578735A (en) * | 2014-10-13 | 2015-04-29 | 华南理工大学 | Diode voltage clamping type multi-level inverter using novel trigistor network |
| CN104333248A (en) * | 2014-10-13 | 2015-02-04 | 华南理工大学 | Multilevel single-phase inverter and multilevel three-phase inverter adopting novel three-terminal switching network |
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2015
- 2015-12-22 CN CN201510969681.7A patent/CN105450064B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3716464A1 (en) * | 2019-03-28 | 2020-09-30 | Vertiv Corporation | An inverter circuit, inverter, and control method and apparatus of an inverter circuit |
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