CN105024570B - A kind of single-phase inversion circuit - Google Patents
A kind of single-phase inversion circuit Download PDFInfo
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- CN105024570B CN105024570B CN201410178730.0A CN201410178730A CN105024570B CN 105024570 B CN105024570 B CN 105024570B CN 201410178730 A CN201410178730 A CN 201410178730A CN 105024570 B CN105024570 B CN 105024570B
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Abstract
A kind of single-phase inversion circuit, can realize automatic current equalizing.The circuit includes four switching tubes, two two-way switch pipe units, transformers and filter capacitor with the first winding and the second winding；The coil turn of first winding and the second winding is identical；Two ends after an each two switching tube branch road in series in four switching tubes, two branch circuit parallel connections of composition connect the two ends of direct-current input power supplying；Two equal sub- power supplys of voltage of the direct-current input power supplying including series connection；In two branch roads, the terminals and one end of a two-way switch pipe unit, the Same Name of Ends of the first winding of two switching tubes are connected in one branch road, and the terminals of two switching tubes are connected with one end of another two-way switch pipe unit, the different name end of the second winding in another branch road；Terminals after terminals between the other end and two sub- power supplys of two two-way switch pipe units are connected are grounded；Terminals after the different name end of first winding is connected with the Same Name of Ends of the second winding are grounded by filter capacitor.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of single-phase inversion circuit.
Background technology
At present, staggered-parallel-type single-phase inversion circuit because has can improve the excellent of system power-density to a certain extent
Put and be used widely.A kind of staggered-parallel-type single-phase inversion circuit of the prior art is as shown in figure 1, specifically include two
Four switching tube S1~S4, two two-way switch pipe units, two inductance L1 and L2 and filter capacitor C, wherein：
Two switching tubes S1 and S2 a branch road in series in four switching tube S1~S4, another two switching tube S3 and S4
The two ends of the direct-current input power supplying of two ends connection single-phase inversion circuit after a branch road in series, two branch circuit parallel connections；
Wherein, two equal sub- power supplys of voltage of the direct-current input power supplying of single-phase inversion circuit including series connection；
Two switching tube S1 are connected with S2 terminals with one end of two-way switch pipe unit 1, inductance L1 one end, and another two
Individual switching tube S3 is connected with S4 terminals with one end of two-way switch pipe unit 2, inductance L2 one end；
Terminals between the other end and two sub- power supplys of two two-way switch pipe units are connected, the connection termination after being connected
Ground；
The inductance L1 other end is connected with the inductance L2 other end, and the terminals after being connected are grounded by filter capacitor C；
Filter capacitor C two ends as single-phase inversion circuit exchange outlet terminal.
Wherein, two-way switch pipe unit can realize two-way switch, and it, which implements structure, many kinds.For example, two-way
Switching pipe unit can be by two IGBT with anti-paralleled diode（Insulated Gate Bipolar Transistor, absolutely
Edge grid bipolar transistor）Constitute；Two IGBT emitter stages are connected, and two IGBT colelctor electrode is respectively as two-way switch pipe
The two ends of unit.
Staggered-parallel-type single-phase inversion circuit shown in Fig. 1, because two inductance L1 and L2 are difficult to accomplish the complete phase of parameter
Together, also, the drive signal of the switching tube of two branch roads will interlock certain angle, therefore in actual applications, if do not entered
Row sharing control, the electric current on two inductance L1 and L2 in equilibrium, circuit it is difficult to ensure that occur larger in the dynamic case
Circulation, influences circuit efficiency.
However, sharing control scheme of the prior art, it is necessary to respectively sample two inductance electric current be controlled, control
The complexity of scheme is higher.
The content of the invention
The embodiment of the present invention provides a kind of single-phase inversion circuit, can realize automatic current equalizing, control program is relatively simple.
The embodiments of the invention provide a kind of single-phase inversion circuit, including four switching tubes, two two-way switch pipe units,
Transformer and filter capacitor with two windings of the first winding and the second winding, wherein：
First winding of transformer and the coil turn of the second winding are identical；
An each two switching tube branch road in series in four switching tubes, two branch roads that four switching tubes are constituted are simultaneously
Connection, the two ends of the direct-current input power supplying of the two ends connection single-phase inversion circuit after parallel connection；The direct-current input power supplying includes series connection
The equal two sub- power supplys of voltage；
In two branch roads that four switching tubes are constituted, the terminals and a two-way switch of two switching tubes in a branch road
One end of pipe unit, the Same Name of Ends of the first winding of transformer are connected, terminals of two switching tubes and another in another branch road
One end of one two-way switch pipe unit, the different name end of the second winding of transformer are connected；
Terminals between the other end and two sub- power supplys of two two-way switch pipe units are connected, the wiring termination after being connected
Ground；
The different name end of first winding of transformer is connected with the Same Name of Ends of the second winding, the terminals connection filtering after being connected
One end of electric capacity, the other end ground connection of filter capacitor；
The two ends of filter capacitor as single-phase inversion circuit exchange outlet terminal.
The embodiment of the present invention additionally provides a kind of single-phase inversion circuit, including 2N switching tube, N number of two-way switch Guan Dan
Member, transformer and filter capacitor with N number of primary side winding and N number of vice-side winding, N are the positive integer more than or equal to 3, wherein：
N number of primary side winding of transformer is identical with the coil turn of N number of vice-side winding, and N number of vice-side winding joins end to end
Constitute loop；
An each two switching tube branch road in series in 2N switching tube, N number of branch circuit parallel connection that 2N switching tube is constituted,
The two ends of the direct-current input power supplying of two ends connection single-phase inversion circuit after parallel connection；The direct-current input power supplying includes the electricity of series connection
Two equal sub- power supplys of pressure；
In N number of branch road that 2N switching tube is constituted, the terminals and a two-way switch of two switching tubes in each branch road
One end of pipe unit, the Same Name of Ends of transformer primary side winding are connected；
Terminals between the other end of N number of two-way switch pipe unit and two sub- power supplys are connected, the wiring termination after being connected
Ground；
The different name end of N number of primary side winding of transformer is connected, and the terminals after being connected connect one end of filter capacitor, filtering
The other end ground connection of electric capacity；
The two ends of filter capacitor as single-phase inversion circuit exchange outlet terminal.
Beneficial effects of the present invention include：
In scheme provided in an embodiment of the present invention, existing staggered-parallel-type single-phase inversion electricity is substituted using the winding of transformer
Inductance in road, ensures the equilibrium of electric current on winding, so as to realize automatic current equalizing, suppression circuit using the characteristic of transformer
In circulation, improve the efficiency and power density of single-phase inversion circuit, the complexity of control program is relatively low.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with present invention implementation
Example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of staggered-parallel-type single-phase inversion circuit in the prior art；
Fig. 2 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 1 is provided；
Fig. 3 is the structural representation for the two-way switch pipe unit that the embodiment of the present invention 1 is provided；
Fig. 4 is the equivalent circuit diagram for the single-phase inversion circuit that the embodiment of the present invention 1 is provided；
Fig. 5 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 2 is provided；
Fig. 6 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 3 is provided；
Fig. 7 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 4 is provided；
Fig. 8 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 5 is provided；
Fig. 9 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 6 is provided；
Figure 10 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 7 is provided；
Figure 11 is the schematic diagram for the single-phase inversion circuit that the embodiment of the present invention 8 is provided.
Embodiment
In order to provide the implementation of the relatively low sharing control of complexity, the embodiments of the invention provide a kind of single-phase inversion
The preferred embodiments of the present invention are illustrated by circuit with reference to Figure of description, it will be appreciated that described herein to be preferable to carry out
Example is merely to illustrate and explain the present invention, and is not intended to limit the present invention.And in the case where not conflicting, the reality in the application
Applying the feature in example and embodiment can be mutually combined.
Embodiment 1：
The embodiment of the present invention 1 provide a kind of single-phase inversion circuit, as shown in Fig. 2 including four switching tube S1~S4,
Two two-way switch pipe units, transformer T and filter capacitor C with two windings of the first winding and the second winding, wherein：
Transformer T the first winding and the coil turn of the second winding are identical；
A S1 and S2 branch road in series in four switching tube S1~S4, S3 and a S4 branch road in series, this two
Two ends after individual branch circuit parallel connection as direct-current input power supplying terminals；The voltage that the direct-current input power supplying includes series connection is equal
Two sub- power supplys；
Switching tube S1 and S2 terminals and one end of two-way switch pipe unit 1, the Same Name of Ends of transformer T the first winding
It is connected, switching tube S3 and S4 terminals and one end of two-way switch pipe unit 2, the different name end phase of transformer T the second winding
Even；
Terminals between the other end and two sub- power supplys of two two-way switch pipe units are connected, the wiring termination after being connected
Ground；
The different name end of transformer T the first winding is connected with the Same Name of Ends of the second winding, the terminals connection filter after being connected
Ripple electric capacity C one end, filter capacitor C other end ground connection；
Filter capacitor C two ends are used as exchange outlet terminal.
The transformer T that the single-phase inversion circuit that i.e. embodiment of the present invention 1 is provided is used has a primary side winding for one
With the transformer of a vice-side winding.Wherein, the first winding can be primary side winding, and the second winding is vice-side winding；Can also
First winding is vice-side winding, and the second winding is primary side winding.
In single-phase inversion circuit provided in an embodiment of the present invention, four switching tube S1~S4 are specifically as follows MOSFET
（Metal Oxide Semiconductor Field Effect Transistor, metal oxide semiconductor field effect transistor
Pipe）, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar crystal with anti-paralleled diode
Pipe), JFET（Junction Field Effect Transistor, junction field effect transistor）Deng electronic power switch device
Part, but it is not limited to above-mentioned device.
In single-phase inversion circuit provided in an embodiment of the present invention, two two-way switch pipe units can realize two-way opened
Close, can be by diode, MOSFET, IGBT, JFET, IGFET (Insulated Gate Field Effect
Transistor, insulated-gate type field effect transistor), IGCT（Intergrated Gate Commutated Thyristor,
Integrated gate commutated thyristor), MCT（MOS Controlled Thyristor, MOS control type IGCTs）Deng device composition.
By taking the two-way switch pipe unit of two IGBT compositions as an example, two IGBT can be connected with colelctor electrode, two IGBT
Emitter stage respectively as two-way switch pipe unit two ends；Two IGBT can also emitter stage be connected, two IGBT collection
Two ends of the electrode respectively as two-way switch pipe unit.
By taking the two-way switch pipe unit that MOSFET and diode are constituted as an example, concrete implementation structure can with as shown in figure 3,
But it is not limited to realize structure shown in Fig. 3.The MOSFET implemented in structure of two-way switch pipe unit shown in Fig. 3
It could alternatively be the electronic power switch device such as IGBT, JFET, IGFET.Two-way switch pipe unit can also use prior art
In any one two-way switch implementation, it is numerous to list herein.
In order to further illustrate the single-phase inversion circuit of the offer of the embodiment of the present invention 1, its operation principle is explained below
State.
In the above embodiment of the present invention 1, the primary side winding and vice-side winding incompletely coupling of transformer, the original of transformer
The coefficient of coup of side winding and vice-side winding needs to be designed according to the requirement to output current ripple size.Shown in Fig. 2
Single-phase inversion circuit equivalent circuit as shown in figure 4, L' for transformer T leakage inductance formation equivalent outputting inductance, T' for reason
Think transformer.
When the single-phase inversion circuit work that the above embodiment of the present invention 1 is provided, two two-way switch pipe units, switching tubes
S1, S3 and transformer T constitute a tri-state switch structure, are operated in the positive half cycle of exchange output, now, switching tube S1 and double
A work bridge arm in the tri-state switch structure, switching tube S3 and the structure of two-way switch pipe unit 2 are constituted to switch pipe unit 1
Into a work bridge arm；Two two-way switch pipe units, switching tube S2, S4 and transformer T constitute a tri-state switch knot
Structure, is operated in the negative half period of exchange output, now, switching tube S2 and two-way switch pipe unit 1 constitute the tri-state switch structure
In a work bridge arm, switching tube S4 and two-way switch pipe unit 2 constitute a work bridge arm.
The each tri-state switch structure constituted when being worked for the single-phase inversion circuit that the embodiment of the present invention 1 is provided, it is same
The drive signal of switching tube and two-way switch pipe unit on individual work bridge arm is complementary, the two of same position on different operating bridge arm
The drive signal of individual switching tube interlocks predetermined angle, the drive of two two-way switch pipe units of same position on different operating bridge arm
Dynamic signal interlocks predetermined angle.
I.e. in the positive half cycle of exchange output, the drive signal of switching tube S1 and two-way switch pipe unit 1 is complementary, switching tube S3
Complementary with the drive signal of two-way switch pipe unit 2, switching tube S1 and S3 drive signal interlocks predetermined angle, two-way switch pipe
The drive signal of unit 1 and two-way switch pipe unit 2 interlocks predetermined angle；In the negative half period of exchange output, switching tube S2 and double
Drive signal to switch pipe unit 1 is complementary, and the drive signal of switching tube S4 and two-way switch pipe unit 2 is complementary, switching tube S2
Interlock predetermined angle with S4 drive signal, the drive signal of two-way switch pipe unit 1 and two-way switch pipe unit 2 interlocks default
Angle.
Above-mentioned predetermined angle is more than 0 ° and is less than 360 °, can be any angle between 0 ° to 360 °.Preferably, this is default
Angle is 180 °, and even-order harmonic can be offset to the full extent.
In the positive half cycle of exchange output, according to two switching tubes S1, S3 and the switch shape of two two-way switch pipe units
State, the single-phase inversion circuit that the embodiment of the present invention 1 is provided can specifically have following four kinds of working conditions：
When switching tube S1 and two-way switch pipe unit 2 are turned on, input voltage by switching tube S1, transformer T first
Winding, filter capacitor C flow directions ground；Meanwhile, transformer T leakage inductance releases energy, two-way switch pipe unit 2, transformer T the second winding
With filter capacitor C afterflows；Now, voltage is 0.5Vdc at the terminals in circuit between transformer T two windings, wherein, Vdc
For the voltage of a sub- power supply in two sub- power supplys；
When switching tube S3 and two-way switch pipe unit 1 are turned on, input voltage by switching tube S3, transformer T second
Winding, filter capacitor C flow directions ground；Meanwhile, transformer T leakage inductance releases energy, two-way switch pipe unit 1, transformer T the first winding
With filter capacitor C afterflows；Now, voltage is 0.5Vdc at the terminals in circuit between transformer T two windings；
When switching tube S1 and switching tube S3 is turned on, input voltage passes through switching tube S1, transformer T the first winding, filter
Ripple electric capacity C flow directions ground；Meanwhile, input voltage passes through switching tube S3, transformer T the second winding, filter capacitor C flow directions ground；This
When, voltage is Vdc at the terminals in circuit between transformer T two windings；
When two-way switch pipe unit 1 and two-way switch pipe unit 2 are turned on, transformer T leakage inductance releases energy, two-way switch pipe
Unit 1, transformer T the first winding and filter capacitor C afterflows；Meanwhile, two-way switch pipe unit 2, transformer T the second winding
With filter capacitor C afterflows；Now, voltage is 0 at the terminals in circuit between transformer T two windings.
In the negative half period of exchange output, according to two switching tubes S2, S4 and the switch shape of two two-way switch pipe units
State, the single-phase inversion circuit that the embodiment of the present invention 1 is provided can specifically have following four kinds of working conditions：
When switching tube S2 and two-way switch pipe unit 2 are turned on, input voltage by switching tube S2, transformer T first
Winding, filter capacitor C flow directions ground；Meanwhile, transformer T leakage inductance releases energy, two-way switch pipe unit 2, transformer T the second winding
With filter capacitor C afterflows；Now, voltage is -0.5Vdc at the terminals in circuit between transformer T two windings；
When switching tube S4 and two-way switch pipe unit 1 are turned on, input voltage by switching tube S4, transformer T second
Winding, filter capacitor C flow directions ground；Meanwhile, transformer T leakage inductance releases energy, two-way switch pipe unit 1, transformer T the first winding
With filter capacitor C afterflows；Now, voltage is -0.5Vdc at the terminals in circuit between transformer T two windings；
When switching tube S2 and switching tube S4 is turned on, input voltage passes through switching tube S2, transformer T the first winding, filter
Ripple electric capacity C flow directions ground；Meanwhile, input voltage passes through switching tube S4, transformer T the second winding, filter capacitor C flow directions ground；This
When, voltage is-Vdc at the terminals in circuit between transformer T two windings；
When two-way switch pipe unit 1 and two-way switch pipe unit 2 are turned on, transformer T leakage inductance releases energy, two-way switch pipe
Unit 1, transformer T the first winding and filter capacitor C afterflows；Meanwhile, two-way switch pipe unit 2, transformer T the second winding
With filter capacitor C afterflows；Now, voltage is 0 at the terminals in circuit between transformer T two windings.
It can be seen that, at the positive half cycle of exchange out-put supply, the terminals between transformer T two windings voltage status have+
Voltage status at Vdc ,+0.5Vdc and 0 three kinds, the terminals between the negative half period of exchange output, transformer T two windings
There are-Vdc, -0.5Vdc and 0 three kinds, therefore the single-phase inversion circuit that the embodiment of the present invention 1 is provided is a kind of tri-state single-phase inversion electricity
Road, the equilibrium of electric current on two windings is ensure that using the characteristic of transformer, so as to the circulation in suppression circuit, is improved
The efficiency and power density of single-phase inversion circuit.Also, compared to prior art, the quantity of current sampling circuit can be reduced,
Circuit cost is reduced, the complexity of control program is relatively low, it is easy to accomplish.
Embodiment 2：
The single-phase inversion circuit that the embodiment of the present invention 2 is provided is as shown in figure 5, compared to above-described embodiment 1, the present invention is implemented
The single-phase inversion circuit that example 2 is provided adds an inductance L, the different name end of transformer T the first winding and the second winding it is same
One end that terminals after name end is connected pass through inductance L connection filter capacitors C.
In the embodiment of the present invention 2, an inductance L is directly increased on the single-phase inversion circuit shown in Fig. 2, then can be with
Transformer T is subjected to analysis design according to ideal transformer, making the design of transformer becomes easy, the coefficient of coup of transformer
Height, leakage field is reduced, and is conducive to EMC Design.
Preferably, on the single-phase inversion circuit base that the embodiment of the present invention 1 or embodiment 2 are provided, can also be in output
End increase EMI（Electromagnetic Interference, electromagnetic interference）Wave filter, reduce ac output end common mode and
Differential mode noise.
Embodiment 3：
The single-phase inversion circuit that the embodiment of the present invention 3 is provided is as shown in fig. 6, compared to above-described embodiment 1, the present invention is implemented
The single-phase inversion circuit that example 3 is provided adds output electromagnetic interface filter, and filter capacitor C two ends connect the input of electromagnetic interface filter
End, the output end of electromagnetic interface filter as single-phase inversion circuit exchange outlet terminal.
Embodiment 4：
The single-phase inversion circuit that the embodiment of the present invention 4 is provided is as shown in fig. 7, compared to above-described embodiment 2, the present invention is implemented
The single-phase inversion circuit that example 4 is provided adds output electromagnetic interface filter, and filter capacitor C two ends connect the input of electromagnetic interface filter
End, the output end of electromagnetic interface filter as single-phase inversion circuit exchange outlet terminal.
The single-phase inversion circuit that the embodiment of the present invention 3 and embodiment 4 are provided can suppress output noise, make single-phase inversion electricity
The output on road meets requirement of the standard to output harmonic wave.
It is to use that there is a primary side winding and a vice-side winding in the above embodiment of the present invention 1- embodiments 4
Transformer realize tri-state single-phase inversion circuit.
The embodiment of the present invention additionally provides a kind of single-phase inversion circuit, including 2N switching tube, N number of two-way switch Guan Dan
Member, transformer and filter capacitor with N number of primary side winding and N number of vice-side winding, N are the positive integer more than or equal to 3, wherein：
N number of primary side winding of transformer is identical with the coil turn of N number of vice-side winding, and N number of vice-side winding joins end to end
Constitute loop；
An each two switching tube branch road in series in 2N switching tube, N number of branch circuit parallel connection that 2N switching tube is constituted,
The two ends of the direct-current input power supplying of two ends connection single-phase inversion circuit after parallel connection；The direct-current input power supplying includes the voltage of series connection
Two equal sub- power supplys；
In N number of branch road that 2N switching tube is constituted, the terminals and a two-way switch of two switching tubes in each branch road
One end of pipe unit, the Same Name of Ends of transformer primary side winding are connected；
Terminals between the other end of N number of two-way switch pipe unit and two sub- power supplys are connected, the wiring termination after being connected
Ground；
The different name end of N number of primary side winding of transformer is connected, and the terminals after being connected connect one end of filter capacitor；Filtering
The other end ground connection of electric capacity；
The two ends of filter capacitor as single-phase inversion circuit exchange outlet terminal.
Using the single-phase inversion circuit, N+1 state single-phase inversion circuits can be realized.
Wherein, 2N switching tube is specifically as follows the electronic power switch device such as MOSFET, IGBT, JFET, but does not limit to
In above-mentioned device.
Two two-way switch pipe units can realize two-way switch, and structure is realized with a variety of, refer to above-described embodiment 1,
It will not be repeated here.
Further, the single-phase inversion circuit can also include inductance, and the different name end of N number of primary side winding of transformer is connected
One end that terminals afterwards pass through inductance connection filter capacitor.
When the single-phase inversion circuit works, upper switching tube and transformer in N number of two-way switch pipe unit, N number of branch road
Constitute a N+1 state construction of switch, be operated in the positive half cycle of exchange output, each upper switching tube in N number of branch road and and its
The two-way switch pipe unit of connection constitutes a work bridge arm in the N+1 state constructions of switch；N number of two-way switch pipe unit, N
Lower switching tube and transformer in individual branch road constitute a N+1 state construction of switch, are operated in the negative half period of exchange output, N number of
Each lower switching tube and connected two-way switch pipe unit in branch road constitute a work in the N+1 state constructions of switch
Make bridge arm.
Opening on each N+1 states construction of switch constituted when being worked for the single-phase inversion circuit, same work bridge arm
The drive signal for closing pipe and two-way switch pipe unit is complementary, the drive signal of the switching tube of the same position on N number of work bridge arm
Interlock successively predetermined angle, the drive signal of the two-way switch pipe unit of the same position on N number of work bridge arm is staggeredly pre- successively
If angle.The predetermined angle is more than 0 ° and is less than 360 °, can be any angle between 0 ° to 360 °.Preferably, the preset angle
Spend and beN times harmonic wave and frequency multiplication subharmonic can be offset to the full extent.
There is provided single-phase inversion circuit with above-described embodiment 1- embodiments 4 can realize that the principle of automatic current equalizing is identical, the list
Phase inverter circuit ensures the equilibrium of electric current in N number of primary side winding also with the characteristic of transformer, so as to reach suppression circuit
In circulation purpose.
Below in conjunction with the accompanying drawings, with using the single-phase inversion electricity with three primary side windings and the transformer of three vice-side windings
Illustrated exemplified by road.
Embodiment 5：
Single-phase inversion circuit that the embodiment of the present invention 5 is provided as shown in figure 8, including six switching tube S1~S6, three pairs
To switch pipe unit, the transformer T with three primary side windings A1, B1, C1 and three vice-side windings A2, B2, C2 and filtered electrical
Hold C, wherein：
Transformer T three primary side windings A1, B1, C1 and three vice-side windings A2, B2, C2 coil turn are identical, and
Three vice-side windings A2, B2, C2, which join end to end, constitutes loop；
A S1 and S2 branch road in series in six switching tube S1~S6, S3 and a S4 branch road in series, S5 and
The two of the direct-current input power supplying of two ends connection single-phase inversion circuit after a S6 branch road in series, three branch circuit parallel connections
End；Two equal sub- power supplys of voltage of the direct-current input power supplying including series connection；
Switching tube S1 and S2 terminals and one end of two-way switch pipe unit 1, transformer T primary side winding A1 it is of the same name
End is connected, switching tube S3 and S4 terminals and one end of two-way switch pipe unit 2, transformer T primary side winding B1 it is of the same name
End is connected, switching tube S5 and S6 terminals and one end of two-way switch pipe unit 3, transformer T primary side winding C1 it is of the same name
End is connected；
Terminals between the other end and two sub- power supplys of three two-way switch pipe units are connected, the wiring termination after being connected
Ground；
Transformer T three primary side windings A1, B1, C1 different name end are connected, the terminals connection filter capacitor C after being connected
One end；Filter capacitor C other end ground connection；
Filter capacitor C two ends as single-phase inversion circuit exchange outlet terminal.
When the single-phase inversion circuit work that the above embodiment of the present invention 5 is provided, three two-way switch pipe units, switching tubes
S1, S3, S5 and transformer T constitute a four state constructions of switch, are operated in the positive half cycle of exchange output, now, switching tube S1
A work bridge arm of the four states construction of switch, switching tube S3 and two-way switch pipe unit 2 are constituted with two-way switch pipe unit 1
A work bridge arm is constituted, switching tube S5 and two-way switch pipe unit 3 constitute a work bridge arm；Three two-way switch pipes
Unit, switching tube S2, S4, S6 and transformer T constitute a four state constructions of switch, are operated in the negative half period of exchange output, this
When, switching tube S2 and two-way switch pipe unit 1 constitute a work bridge arm of the four states construction of switch, switching tube S4 and two-way
Switch pipe unit 2 constitutes a work bridge arm, and switching tube S6 and two-way switch pipe unit 3 constitute a work bridge arm.
The each four states construction of switch constituted when being worked for the single-phase inversion circuit that the embodiment of the present invention 5 is provided, is being handed over
Flow the positive half cycle of output, the drive signal complementation of switching tube S1 and two-way switch pipe unit 1, switching tube S3 and two-way switch Guan Dan
The drive signal of member 2 is complementary, and the drive signal of switching tube S5 and two-way switch pipe unit 3 is complementary, switching tube S1, S3, S5 drive
Dynamic signal successively interlock predetermined angle, two-way switch pipe unit 1, two-way switch pipe unit 2, the driving of two-way switch pipe unit 3
Signal successively interlock predetermined angle；In the negative half period of exchange output, the drive signal of switching tube S2 and two-way switch pipe unit 1 is mutual
Mend, the drive signal of switching tube S4 and two-way switch pipe unit 2 is complementary, the driving letter of switching tube S6 and two-way switch pipe unit 3
Number complementation, switching tube S2, S4, S6 drive signal interlocks predetermined angle, two-way switch pipe unit 1, two-way switch Guan Dan successively
Member 2, the drive signal of two-way switch pipe unit 3 interlock predetermined angle successively.Preferably, the predetermined angle is 120 °.
The single-phase inversion circuit that the embodiment of the present invention 5 is provided exchange output positive half cycle, three primary sides of transformer around
Voltage status specifically has four kinds at terminals between group A1, B1, C1 different name end, in the negative half period of exchange output, transformer
Voltage status specifically also has four kinds, the i.e. embodiment of the present invention 5 at terminals between three primary side windings A1, B1, C1 different name end
The single-phase inversion circuit of offer is a kind of four states single-phase inversion circuit, and its specific workflow will not be described in detail herein.
Embodiment 6：
The single-phase inversion circuit that the embodiment of the present invention 6 is provided is as shown in figure 9, compared to above-described embodiment 5, the present invention is implemented
The single-phase inversion circuit that example 6 is provided adds an inductance L, transformer T three primary side windings A1, B1, C1 different name end phase
One end that terminals after even pass through inductance L connection filter capacitors C.
The single-phase inversion circuit that the embodiment of the present invention 6 is provided, by increasing inductance L, making the design of transformer becomes easy,
Be conducive to EMC Design.
Preferably, on the single-phase inversion circuit base that the embodiment of the present invention 5 or embodiment 6 are provided, can also be in output
End increase electromagnetic interface filter.
Embodiment 7：
As shown in Figure 10, compared to above-described embodiment 5, the present invention is real for the single-phase inversion circuit that the embodiment of the present invention 7 is provided
The single-phase inversion circuit for applying the offer of example 7 adds output electromagnetic interface filter, and filter capacitor C two ends connect the input of electromagnetic interface filter
End, the output end of electromagnetic interface filter as single-phase inversion circuit exchange outlet terminal.
Embodiment 8：
As shown in figure 11, compared to above-described embodiment 6, the present invention is real for the single-phase inversion circuit that the embodiment of the present invention 8 is provided
The single-phase inversion circuit for applying the offer of example 8 adds output electromagnetic interface filter, and filter capacitor C two ends connect the input of electromagnetic interface filter
End, the output end of electromagnetic interface filter as single-phase inversion circuit exchange outlet terminal.
The single-phase inversion circuit that the embodiment of the present invention 7 and embodiment 8 are provided can suppress output noise, make single-phase inversion electricity
The output on road meets requirement of the standard to output harmonic wave.
In other embodiments of the invention, the transformer used in single-phase inversion circuit can also be with four and
The transformer of more primary side windings and vice-side winding, is no longer illustrated herein.
In summary, using scheme provided in an embodiment of the present invention, the circulation in single-phase inversion circuit can be suppressed, improved
Circuit efficiency and power density, reduce circuit cost, also, scheme is simple, it is easy to accomplish.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (6)
1. a kind of single-phase inversion circuit, it is characterised in that including four switching tubes, two two-way switch pipe units, with first
The transformer and filter capacitor of two windings of winding and the second winding, wherein：
First winding of transformer and the coil turn of the second winding are identical；
An each two switching tube branch road in series in four switching tubes, two branch circuit parallel connections that four switching tubes are constituted, and
The two ends of the direct-current input power supplying of two ends connection single-phase inversion circuit after connection；The direct-current input power supplying includes the voltage of series connection
Two equal sub- power supplys；
In two branch roads that four switching tubes are constituted, the terminals and a two-way switch Guan Dan of two switching tubes in a branch road
One end of member, the Same Name of Ends of the first winding of transformer are connected, in another branch road the terminals of two switching tubes and another
One end of two-way switch pipe unit, the different name end of the second winding of transformer are connected；
Terminals between the other end and two sub- power supplys of two two-way switch pipe units are connected, the terminals ground connection after being connected；
The different name end of first winding of transformer is connected with the Same Name of Ends of the second winding, the terminals connection filter capacitor after being connected
One end, filter capacitor the other end ground connection；
The two ends of filter capacitor as single-phase inversion circuit exchange outlet terminal.
2. circuit as claimed in claim 1, it is characterised in that also including inductance, the different name end of the first winding of transformer and
One end that terminals after the Same Name of Ends of second winding is connected pass through inductance connection filter capacitor.
3. circuit as claimed in claim 1 or 2, it is characterised in that also including output electromagnetic interference electromagnetic interface filter.
4. a kind of single-phase inversion circuit, it is characterised in that including 2N switching tube, N number of two-way switch pipe unit, with N number of original
The transformer and filter capacitor of side winding and N number of vice-side winding, N are the positive integer more than or equal to 3, wherein：
N number of primary side winding of transformer is identical with the coil turn of N number of vice-side winding, and N number of vice-side winding joins end to end composition
Loop；
An each two switching tube branch road in series in 2N switching tube, N number of branch circuit parallel connection that 2N switching tube is constituted is in parallel
The two ends of the direct-current input power supplying of two ends connection single-phase inversion circuit afterwards；The direct-current input power supplying includes the voltage phase of series connection
Deng two sub- power supplys；
In N number of branch road that 2N switching tube is constituted, the terminals and a two-way switch Guan Dan of two switching tubes in each branch road
One end of member, the Same Name of Ends of a primary side winding of transformer are connected；
Terminals between the other end of N number of two-way switch pipe unit and two sub- power supplys are connected, the terminals ground connection after being connected；
The different name end of N number of primary side winding of transformer is connected, and the terminals after being connected connect one end of filter capacitor, filter capacitor
The other end ground connection；
The two ends of filter capacitor as single-phase inversion circuit exchange outlet terminal.
5. circuit as claimed in claim 4, it is characterised in that also including inductance, the different name end of N number of primary side winding of transformer
One end that terminals after being connected pass through inductance connection filter capacitor.
6. the circuit as described in claim 4 or 5, it is characterised in that also including output electromagnetic interference electromagnetic interface filter.
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| CN201410178730.0A CN105024570B (en) | 2014-04-29 | 2014-04-29 | A kind of single-phase inversion circuit |
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| CN112865508A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Single-phase three-level power factor correction circuit of novel asymmetric T-shaped bridge |
| CN115664248B (en) * | 2022-12-14 | 2023-03-21 | 惠州市乐亿通科技有限公司 | Bidirectional inverter circuit and bidirectional inverter |
| CN117294160B (en) * | 2023-11-22 | 2024-03-19 | 深圳市云天数字能源有限公司 | Parallel operation inverter system and circulation suppression method thereof |
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