CN209345029U - Five level inverse conversion topological circuits of one kind and five-electrical level inverter - Google Patents
Five level inverse conversion topological circuits of one kind and five-electrical level inverter Download PDFInfo
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- CN209345029U CN209345029U CN201822218032.5U CN201822218032U CN209345029U CN 209345029 U CN209345029 U CN 209345029U CN 201822218032 U CN201822218032 U CN 201822218032U CN 209345029 U CN209345029 U CN 209345029U
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Abstract
The utility model provides five level inverse conversion topological circuits of one kind and five-electrical level inverter, the circuit includes the first bridge arm, second bridge arm, third bridge arm, four bridge legs, 5th bridge arm, 6th bridge arm, high frequency transformer, inductance and the first filter capacitor, first bridge arm, second bridge arm, third bridge arm, four bridge legs, 5th bridge arm and the 6th bridge arm are made of antiparallel switching device and freewheeling diode, first bridge arm and the second bridge arm are composed in series the first series arm, the third bridge arm and four bridge legs are composed in series the second series arm, 5th bridge arm and the 6th bridge arm are composed in series third series arm, first series arm, second series arm and third series arm are in parallel；The circuit realizes naturally sharing current, convenient for control electric current, improves circuit stability；More level outputs are realized simultaneously, are advantageously reduced harmonic component, are reduced the working frequency of switching device, and then improve the working efficiency of Miniature inverter.
Description
Technical field
The utility model belongs to power electronics field, more particularly, to a kind of five level inverse conversion topological circuits and
Five-electrical level inverter.
Background technique
With the development of distributed generation technology, Miniature inverter system is due to real in generating efficiency, security and reliability
With novel advantage, the increasingly welcome by market, but the cost of Miniature inverter system and two aspect of working efficiency because
Element is an important factor for restricting its development.Traditional inversion topological circuit uses full-bridge crisscross parallel circuit, there are bipolarity and
Two kinds of control modes of unipolarity, filter inductance volume and loss are larger, and the working efficiency for also resulting in Miniature inverter reduces；By
It is not consistent in the impedance of two full-bridge circuits, so output electric current has differences, heat dissipation and service life to Miniature inverter
It will cause adverse effect.
Utility model content
The purpose of this utility model is to provide a kind of five level inverse conversion topological circuits, solve existing inversion topological circuit
The existing above problem.
To achieve the above object, the utility model provides a kind of five level inverse conversion topological circuits, including the first bridge arm, the
Two bridge arms, third bridge arm, four bridge legs, the 5th bridge arm, the 6th bridge arm, high frequency transformer, inductance and the first filter capacitor, it is described
First bridge arm, the second bridge arm, third bridge arm, four bridge legs, the 5th bridge arm and the 6th bridge arm by antiparallel switching device and
Freewheeling diode is constituted, and first bridge arm and the second bridge arm are composed in series the first series arm, the third bridge arm and the 4th
Bridge arm is composed in series the second series arm, and the 5th bridge arm and the 6th bridge arm are composed in series third series arm, and described first
Series arm, the second series arm and third series arm are in parallel；
The inductance and the first filter capacitor are composed in series the 4th series arm, the primary side winding tool of the high frequency transformer
There are two leading-out terminals, and there are two leading-out terminals for vice-side winding tool, and the one pair of them different name end in leading-out terminal is connected in series,
One end of 4th series arm is connected among concatenated a pair of of different name end, and the other end is connected to first bridge arm and the
Between two bridge arms；Another pair different name end in leading-out terminal is connected between third bridge arm and four bridge legs and the 5th
Between bridge arm and the 6th bridge arm.
Preferably, the circuit further includes the second filter capacitor, and second filter capacitor is connected to first series connection
The both ends of branch.
Preferably, the switching device is triode, metal-oxide-semiconductor or IGBT pipe.
Preferably, the primary side winding of the high frequency transformer and the turn ratio of vice-side winding are 1:1.
The utility model additionally provides five-electrical level inverter, including continuous input cell, exchange output unit and five level
Inversion topological circuit, wherein the anode of continuous input cell is connected with the positive input terminal of the five level inverse conversions topological circuit, directly
The cathode of stream input unit is connected with the negative input end of the five level inverse conversions topological circuit, the exchange output unit both ends point
Not connected with the output end of the five level inverse conversions topological circuit.
Preferably, the five-electrical level inverter further includes the second filter capacitor, and second filter capacitor is connected to described
Continuous input cell both ends.
The utility model compared with prior art, has the following advantages and outstanding effects:
A kind of five level inverse conversions topological circuit and five-electrical level inverter provided by the utility model, by utilizing high frequency transformation
Device, and the quantity of switching device is reduced, naturally sharing current is realized, convenient for control electric current, improves circuit stability；It is real simultaneously
Show more level outputs and advantageously reduces harmonic wave point so that the inversion topological circuit output level quantity has reached five level
Amount, reduces the working frequency of switching device, and then improve the working efficiency of Miniature inverter.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of inversion topological circuit of the prior art；
Fig. 2 is the structural schematic diagram of five level inverse conversion topological circuit of one kind disclosed in the utility model embodiment；
Fig. 3 is the schematic diagram of the first operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 4 is the schematic diagram of second of operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 5 is the schematic diagram of the third operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 6 is the schematic diagram of the 4th kind of operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 7 is the schematic diagram of the 5th kind of operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 8 is the schematic diagram of the 6th kind of operation mode of five level inverse conversion topological circuits in the present embodiment；
Fig. 9 is the schematic diagram of the 7th kind of operation mode of five level inverse conversion topological circuits in the present embodiment；
Figure 10 is the schematic diagram of the 8th kind of operation mode of five level inverse conversion topological circuits in the present embodiment；
Figure 11 is the schematic diagram in the work wave of five level inverse conversion topological circuits of network voltage positive half period；
Figure 12 is a kind of schematic diagram of five-electrical level inverter disclosed in the utility model embodiment.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
As shown in Fig. 2, the utility model embodiment discloses a kind of five level inverse conversion topological circuits, including the first bridge arm,
Second bridge arm, third bridge arm, four bridge legs, the 5th bridge arm, the 6th bridge arm, high frequency transformer, inductance, the first filter capacitor and
Two filter capacitors.First bridge arm, the second bridge arm, third bridge arm, four bridge legs, the 5th bridge arm and the 6th bridge arm are by antiparallel
Switching device and freewheeling diode are constituted, and the first bridge arm and the second bridge arm are composed in series the first series arm, third bridge arm and the
Four bridge legs are composed in series the second series arm, and the 5th bridge arm and the 6th bridge arm are composed in series third series arm, the first series connection branch
Road, the second series arm and third series arm are in parallel.Above-mentioned switching device is triode, metal-oxide-semiconductor or IGBT pipe, this implementation
In example, switching device is IGBT pipe.
Wherein, the first bridge arm is made of the first IGBT S1 and 1 inverse parallel of the first sustained diode, the first IGBT S1's
Emitter connects the anode of the first sustained diode 1, and the collector of the first IGBT S1 connects the negative of the first sustained diode 1
Pole.Second bridge arm is made of the 2nd IGBT S2 and 2 inverse parallel of the second sustained diode, the emitter connection of the 2nd IGBT S2
The anode of second sustained diode 2, the collector of the 2nd IGBT S2 connect the cathode of the second sustained diode 2.Third bridge
Arm is made of the 3rd IGBT S3 and 3 inverse parallel of third sustained diode, and the emitter of the 3rd IGBT S3 connects third afterflow two
The anode of pole pipe D3, the cathode of the collector connection third sustained diode 3 of the 3rd IGBT S3.
Four bridge legs are made of the 4th IGBT S4 and 4 inverse parallel of the 4th sustained diode, the transmitting of the 4th IGBT S4
Pole connects the anode of the 4th sustained diode 4, and the collector of the 4th IGBT S4 connects the cathode of the 4th sustained diode 4.The
Five bridge arms are made of the 5th IGBT S5 and 5 inverse parallel of the 5th sustained diode, and the emitter connection the 5th of the 5th IGBT S5 is continuous
The anode of diode D5 is flowed, the collector of the 5th IGBT S5 connects the cathode of the 5th sustained diode 5.6th bridge arm is by the 6th
IGBT S6 and 6 inverse parallel of the 6th sustained diode are constituted, and the emitter of the 6th IGBT S6 connects the 6th sustained diode 6
Anode, the collector of the 6th IGBT S6 connects the cathode of the 6th sustained diode 6.
Five level inverse conversion topological circuit of one kind disclosed in the utility model embodiment and tradition inversion topological electricity disclosed in Fig. 1
Road is compared, and the quantity of switching device reduces two, and inductance quantity reduces three, thereby realizes subtracting for switching device
It is few, reduce the complexity of control and the cost of whole system.
Inductance L and the 4th series arm is composed in series with the first filter capacitor C2, the primary side winding tool of high frequency transformer T1
There are two leading-out terminals, i.e. leading-out terminal 1 and 2, and there are two leading-out terminals, i.e. leading-out terminal 3 and 4 for vice-side winding tool；Exit
One pair of them different name end in son is connected in series, and in the present embodiment, different name end 2 and 3 is connected in series, and the one of the 4th series arm
End is connected to the centre at different name end 2 and 3, and the other end is connected between the first bridge arm and the second bridge arm；It is another in leading-out terminal
To different name end, i.e. different name end 1 and 4 is connected between third bridge arm and four bridge legs and the 5th bridge arm and the 6th bridge arm
Between.Second filter capacitor C1 is connected to the both ends of the first series arm.
If DC input voitage is Vbus, then voltage V between a, b two o'clock in the five level inverse conversions topological circuitabIt may be implemented
Output ± Vbus/2、±VbusWith 0 this five level, the output of five level actives is realized, advantageously reduces harmonic component, reduction is opened
Device operating frequencies are closed, the working efficiency of Miniature inverter is improved；The frequency multiplication control mode of crisscross parallel is also beneficial to reduce
Output inductor volume, on the other hand, since the primary side winding and vice-side winding turn ratio of high frequency transformer are 1:1, so
Electric current by primary side winding and vice-side winding is equal, realizes to third bridge arm, the 5th bridge arm, four bridge legs, the 6th bridge arm
The naturally sharing current of electric current is convenient for current control, improves circuit stability.
Wherein, five level inverse conversions topological circuit provided by the embodiment of the utility model is continuously worked with critical current mode
It include eight kinds of operation modes when realizing that direct current and alternating current are converted, with reference to the accompanying drawing to shown in Fig. 2 when mode works
Eight kinds of operation modes of five level inverse conversion topological circuits carry out detailed analysis.It should be noted that in other embodiments, five electricity
Flat inversion topological circuit can also work in discontinuous current mode and continuous mode.
Fig. 3 discloses the first operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in positive half period, the 2nd IGBT S2 conducting, the first IGBT S1 shutdown, the 3rd IGBT S3 and the 6th IGBT
S6 conducting, circuital current direction is positive, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be DC bus-bar voltage Vbus, since primary side winding and vice-side winding turn ratio are 1:1, so 3,4 both ends
Voltage is half, that is, V of 1,4 both end voltagesbus/ 2, so voltage V between a, b two o'clockab=Vbus/2。
Fig. 4 discloses second of operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in positive half period, the 2nd IGBT S2 conducting, the first IGBT S1 shutdown, the 4th IGBT S4 and the 5th IGBT S5
Conducting, circuital current direction is positive, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1's
1,4 both end voltages are DC bus-bar voltage Vbus, since primary side winding and vice-side winding turn ratio are 1:1, so 1,2 both ends are electric
Pressure is half, that is, V of 1,4 both end voltagesbus/ 2, so voltage V between a, b two o'clockab=Vbus/2。
Fig. 5 discloses the third operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in positive half period, the 2nd IGBT S2 conducting, the first IGBT S1 shutdown, the 3rd IGBT S3 and the 5th IGBT
S5 conducting, circuital current direction is positive, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be zero, so 1,2 both end voltages are also zero, voltage V between a, b two o'clockab=Vbus。
Fig. 6 discloses the 4th kind of operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in positive half period, the 2nd IGBT S2 conducting, the first IGBT S1 shutdown, the 4th IGBT S4 and the 6th IGBT
S6 conducting, circuital current direction is positive, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be zero, so 1,2 both end voltages are also zero, voltage V between a, b two o'clockab=0.
Fig. 7 discloses the 5th kind of operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in negative half-cycle, the 2nd IGBT S2 shutdown, the first IGBT S1 conducting, the 3rd IGBT S3 and the 6th IGBT
S6 conducting, circuital current direction is negative, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be DC bus-bar voltage Vbus, so 3,4 both end voltages are half, that is, V of 1,4 both end voltagesbus/ 2, so
A, voltage V between b two o'clockab=-Vbus/2。
Fig. 8 discloses the 6th kind of operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in negative half-cycle, the 2nd IGBT S2 shutdown, the first IGBT S1 conducting, the 4th IGBT S4 and the 5th IGBT
S5 conducting, circuital current direction is negative, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be DC bus-bar voltage Vbus, so 1,2 both end voltages are half, that is, V of 1,4 both end voltagesbus/ 2, so
A, voltage V between b two o'clockab=-Vbus/2。
Fig. 9 discloses the 7th kind of operation mode of five level inverse conversion topological circuits in the present embodiment, under the operation mode,
Network voltage is in negative half-cycle, the 2nd IGBT S2 shutdown, the first IGBT S1 conducting, the 4th IGBT S4 and the 6th IGBT
S6 conducting, circuital current direction is negative, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be zero, so 1,2 both end voltages are also zero, voltage V between a, b two o'clockab=-Vbus。
Figure 10 discloses the 8th kind of operation mode of five level inverse conversion topological circuits in the present embodiment, the operation mode
Under, network voltage is in negative half-cycle, the 2nd IGBT S2 shutdown, the first IGBT S1 conducting, the 3rd IGBT S3 and the 5th IGBT
S5 conducting, circuital current direction is negative, i.e., as shown in arrow direction in figure, if DC input voitage is Vbus, high frequency transformer T1
1,4 both end voltages be zero, so 1,2 both end voltages are also zero, voltage V between a, b two o'clockab=0.
Figure 11 discloses the work wave in five level inverse conversion topological circuits of network voltage positive half period, network voltage compared with
When low, operation mode switches between 1/2 and 4, voltage V between a, b two o'clock of high frequency transformer T1abFor 0 and Vbus/2；Power grid
When voltage is higher, operation mode switches between 1/2 and 3, voltage V between a, b two o'clock of high frequency transformer T1abFor VbusWith
Vbus/2.By controlling the duration of every two kinds of operation modes, inductive current I is controlledLRising and falling time, to reach
To the purpose of control inductive current.
Figure 12 discloses the five-electrical level inverter in the present embodiment, which includes continuous input cell Vbus、
Exchange output unit VgridWith five level inverse conversion topological circuits in above-described embodiment, wherein continuous input cell VbusAnode
It is connected with the positive input terminal M1 of five level inverse conversion topological circuits, continuous input cell VbusCathode and five level inverse conversions topology electricity
The negative input end M2 connection on road exchanges output unit VgridBoth ends are connected with the output end of five level inverse conversion topological circuits respectively.
Second filter capacitor C1 is also connected to above-mentioned continuous input cell VbusBoth ends.
Five level inverse conversion topological circuit of one kind and five-electrical level inverter disclosed in the present embodiment, by utilizing high frequency transformation
Device, and the quantity of switching device is reduced, naturally sharing current is realized, convenient for control electric current, improves circuit stability；It is real simultaneously
Show more level outputs and advantageously reduces harmonic wave point so that the inversion topological circuit output level quantity has reached five level
Amount, reduces the working frequency of switching device, and then improve the working efficiency of Miniature inverter.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not limited to this foregoing is merely specific embodiment of the utility model
Utility model, all any modification, equivalent substitution, improvement and etc. within the principle of the utility model, done should be included in this
Within the protection scope of utility model.
Claims (6)
1. a kind of five level inverse conversion topological circuits, which is characterized in that including the first bridge arm, the second bridge arm, third bridge arm, the 4th bridge
Arm, the 5th bridge arm, the 6th bridge arm, high frequency transformer, inductance and the first filter capacitor, first bridge arm, the second bridge arm, third
Bridge arm, four bridge legs, the 5th bridge arm and the 6th bridge arm are made of antiparallel switching device and freewheeling diode, and described first
Bridge arm and the second bridge arm are composed in series the first series arm, and the third bridge arm and four bridge legs are composed in series the second series connection branch
Road, the 5th bridge arm and the 6th bridge arm are composed in series third series arm, first series arm, the second series arm and
Third series arm is in parallel；
The inductance and the first filter capacitor are composed in series the 4th series arm, and the primary side winding of the high frequency transformer has two
A leading-out terminal, there are two leading-out terminals for vice-side winding tool, and the one pair of them different name end in leading-out terminal is connected in series, and the 4th
One end of series arm is connected among concatenated a pair of of different name end, and the other end is connected to first bridge arm and the second bridge
Between arm；Another pair different name end in leading-out terminal is connected between third bridge arm and four bridge legs and the 5th bridge arm
And the 6th between bridge arm.
2. five level inverse conversion topological circuits of one kind as described in claim 1, which is characterized in that the circuit further includes the second filter
Wave capacitor, second filter capacitor are connected to the both ends of first series arm.
3. five level inverse conversion topological circuits of one kind as described in claim 1, which is characterized in that the switching device is three poles
Pipe, metal-oxide-semiconductor or IGBT pipe.
4. five level inverse conversion topological circuits of one kind as described in claim 1, which is characterized in that the primary side of the high frequency transformer
The turn ratio of winding and vice-side winding is 1:1.
5. a kind of five-electrical level inverter, which is characterized in that including continuous input cell, exchange output unit and claim 1 institute
The five level inverse conversion topological circuits stated, wherein continuous input cell anode and the five level inverse conversions topological circuit positive input
End connection, the cathode of continuous input cell are connected with the negative input end of the five level inverse conversions topological circuit, the exchange output
Unit both ends are connected with the output end of the five level inverse conversions topological circuit respectively.
6. a kind of five-electrical level inverter as claimed in claim 5, which is characterized in that the five-electrical level inverter further includes second
Filter capacitor, second filter capacitor are connected to the continuous input cell both ends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822218032.5U CN209345029U (en) | 2018-12-27 | 2018-12-27 | Five level inverse conversion topological circuits of one kind and five-electrical level inverter |
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| CN201822218032.5U CN209345029U (en) | 2018-12-27 | 2018-12-27 | Five level inverse conversion topological circuits of one kind and five-electrical level inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2018
- 2018-12-27 CN CN201822218032.5U patent/CN209345029U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Address after: 310000 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Hemai Power Electronics Co.,Ltd. Address before: 310000 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Hemai Power Electronics Co.,Ltd. Address after: 310000 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Hemai Power Electronics Co.,Ltd. Address before: 310000 3rd floor, building 11, No.18, Kangjing Road, Gongshu District, Hangzhou City, Zhejiang Province Patentee before: HOYMILES CONVERTER TECHNOLOGY Co.,Ltd. |