CN206226317U - The integrated three-level dual-buck half-bridge inverter of magnetic - Google Patents
The integrated three-level dual-buck half-bridge inverter of magnetic Download PDFInfo
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- CN206226317U CN206226317U CN201621327709.3U CN201621327709U CN206226317U CN 206226317 U CN206226317 U CN 206226317U CN 201621327709 U CN201621327709 U CN 201621327709U CN 206226317 U CN206226317 U CN 206226317U
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Abstract
The utility model is related to a kind of integrated three-level dual-buck half-bridge inverter of magnetic, the positive pole of dc source Vd1 is connected with the drain electrode of switching tube S1, the source electrode of switching tube S1 and the source electrode of switching tube S2, the Same Name of Ends connection of inductance L1, the different name end of inductance L1 and the different name end of inductance L2, one end of output filter capacitor C, load one end connection of R, the Same Name of Ends of inductance L2 and the positive pole of diode D2, the drain electrode connection of switching tube S3, the source electrode of S3 is connected with the negative pole of dc source Vd2, the drain electrode of S2 is connected with the negative pole of diode D1, the negative pole of D2 is connected with the source electrode of switching tube S4；The grounded drain of the negative pole of dc source Vd1, the positive pole of dc source Vd2, the positive pole of diode D1, the other end of output filter capacitor C, the other end of load R and S4.The utility model overcomes that prior art voltage utilization is low, bridge arm is output as that bipolarity PWM ripple, power device voltage stress be big, the bulky defect of output inductor.
Description
Technical field
The utility model is related to a kind of integrated three-level dual-buck half-bridge inverter of magnetic.
Background technology
Multi-electrical level inverter overcomes the problem of bridge-type inverter and push-pull dc-to-ac switch tube voltage stress, Er Qie electricity
Flat increasing for number can cause that the total harmonic distortion factor of output voltage is smaller, and multi-electrical level inverter is suitable for high-power conversion
Occasion, but multi-electrical level inverter is limited to input capacitance and presses, and Multilevel modulation is coupled with input pressure and can cause many level
Converter circuit structure is slow with the numerous and diverse, governing speed of control.Traditional two level dual-buck half-bridge inverters are due to without bridge
Arm is straight-through, switching tube need not set Dead Time, there have independent fly-wheel diode to optimize design, reliability to be high, defeated
The advantages of going out good waveform quality, efficiency high, but traditional two level dual-buck half-bridge inverter input voltage its amplitude exceedes
The twice of output voltage maximum, device voltage stress is big, and DC voltage utilization rate is low, and it needs two independences during normal work
Output inductor cause that the volume and weight of inverter is larger, although introduce integrated magnetic can reduce filter inductance
Volume and weight but the possibility of circulation can be introduced simultaneously, reduce the reliability of circuit.In three-level dual-buck half-bridge inverter
Middle introducing integrated magnetic may not necessarily worry circuit and produce circulation, it can be ensured that the reliability of circuit.
The content of the invention
In view of this, the purpose of this utility model be provide a kind of integrated three-level dual-buck half-bridge inverter of magnetic and
Its mode of operation, overcomes that prior art voltage utilization is low, bridge arm is output as bipolarity PWM ripple, power device voltage
Stress is big, the bulky defect of output inductor.
The utility model is realized using following technical scheme to achieve the above object：
A kind of integrated three-level dual-buck half-bridge inverter of magnetic, it is characterised in that：Including dc source Vd1, direct current
Source Vd2, diode D1, diode D2, switching tube S1, switching tube S2, switching tube S3, switching tube S4, by inductance L1 and inductance L2
The coupling inductance of composition, output filter capacitor C and load R；The positive pole of dc source Vd1 is connected with the drain electrode of switching tube S1, opens
The source electrode of pipe S1 source electrode respectively with switching tube S2, the Same Name of Ends of inductance L1 is closed to be connected, the different name end of inductance L1 respectively with inductance
The different name end of L2, one end of output filter capacitor C, one end connection of load R, the Same Name of Ends of inductance L2 is respectively with diode D2's
The drain electrode connection of positive pole, switching tube S3, the source electrode of switching tube S3 is connected with the negative pole of dc source Vd2, the drain electrode of switching tube S2
Negative pole with diode D1 is connected, and the negative pole of diode D2 is connected with the source electrode of switching tube S4；It is the negative pole of dc source Vd1, straight
Flow positive pole, the positive pole of diode D1, the other end of output filter capacitor C, the other end of load and the switching tube S4 of power supply Vd2
Grounded drain.
The utility model has the advantages that compared with prior art：Compared to existing three level double voltage reducing type half
Bridge inverter, the integrated three-level dual-buck half-bridge inverter of magnetic of the present utility model is improved, and reduces the pole of afterflow two
The quantity of pipe so that circuit topological structure becomes simple, while introduce integrated magnetic, further smaller filter inductance
Volume and weight.
Brief description of the drawings
Fig. 1 is existing three-level dual-buck half-bridge inverter main circuit block diagram.
Fig. 2 is the integrated three-level dual-buck half-bridge inverter main circuit block diagram of magnetic of the present utility model.
Fig. 3 is integrated three-level dual-buck half-bridge inverter bridge arm output UA "+1 " state of magnetic of the present utility model.
Fig. 4 is integrated three-level dual-buck half-bridge inverter bridge arm output UA " 0 " state of magnetic of the present utility model.
Fig. 5 is integrated three-level dual-buck half-bridge inverter bridge arm output UB " -1 " state of magnetic of the present utility model.
Fig. 6 is integrated three-level dual-buck half-bridge inverter bridge arm output UB " -1 " state of magnetic of the present utility model.
Fig. 7 is integrated three-level dual-buck half-bridge inverter bridge arm output UB " 0 " state of magnetic of the present utility model.
Fig. 8 is integrated three-level dual-buck half-bridge inverter bridge arm output UA "+1 " state of magnetic of the present utility model.
Fig. 9 is the integrated three-level dual-buck half-bridge inverter control block diagram of magnetic of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the utility model.
Existing three-level dual-buck half-bridge inverter is as shown in figure 1, the integrated double down pressure of three level of magnetic of the present utility model
Formula half-bridge inverter is improved on the basis of Fig. 1, reduces two fly-wheel diodes so that circuit topological structure becomes
Simply, while the integrated magnetic for introducing, the further smaller volume and weight of filter inductance, while coupling inductance can disappear
Except discontinuous current mode area is likely to occur device voltage spike high, it is ensured that the high efficiency and reliability of converter.
Refer to Fig. 2, the integrated three-level dual-buck half-bridge inverter of magnetic of the present utility model include dc source Vd1,
Dc source Vd2, diode D1, diode D2, switching tube S1, switching tube S2, switching tube S3, switching tube S4, by inductance L1 and
The coupling inductance of inductance L2 compositions, output filter capacitor C and load R；The positive pole of dc source Vd1 connects with the drain electrode of switching tube S1
Connect, the source electrode of switching tube S1 source electrode respectively with switching tube S2, the Same Name of Ends of inductance L1 are connected, the different name end of inductance L1 respectively with
The different name end of inductance L2, one end of output filter capacitor C, one end connection of load R, the Same Name of Ends of inductance L2 respectively with diode
The drain electrode connection of the positive pole, switching tube S3 of D2, the source electrode of switching tube S3 is connected with the negative pole of dc source Vd2, switching tube S2's
Drain electrode is connected with the negative pole of diode D1, and the negative pole of diode D2 is connected with the source electrode of switching tube S4；Dc source Vd1's is negative
Pole, the positive pole of dc source Vd2, the positive pole of diode D1, the other end of output filter capacitor C, the other end and switch of load
The grounded drain of pipe S4, the switching tube S1, switching tube S2, switching tube S3, the grid connection control signal of switching tube S4.Its
In, switching tube S1, switching tube S2 and diode D1 are followed in series to form the first bridge arm;Switching tube S3, switch S4 and diode D2
It is followed in series to form the second bridge arm.The control block diagram of switching tube S1 to S4 refer to Fig. 9.
In order to the technical solution of the utility model is better described, carried out furtherly below in conjunction with specific works pattern
It is bright.
The integrated three-level dual-buck half-bridge of magnetic circuit current continous way work under without biasing current half operational mode
Operation mode when making："+1 state " of bridge arm voltage UA output voltages+Ud, bridge arm voltage UA output voltages are zero " 0 state ", bridge
"+1 state " of arm voltage UB output voltages+Ud, bridge arm voltage UB output voltages are zero " 0 state ", bridge arm voltage UB output voltages-
" -1 state " of Ud.There are three working conditions of "+1 state " and " -1 state " and " 0 state " during circuit normal work；Specific works pattern
Including
（1）Flow through the output current of load Ri o >0 positive half cycle
Mode of operation I：Refer to Fig. 3, switching tube S1 conductings, switching tube S2, switching tube S3, switching tube S4 and diode D2
Cut-off, the electric current I of inductance L1L1Linear rise, switching tube S3 passes through with diode D1 branch road no currents, switching tube S1 source electrodes it is inverse
It is UA=+Ud to become bridge output level, wherein, the output voltage of dc source Vd1 and the output voltage of dc source Vd2 are all Ud；
Mode of operation II：Refer to Fig. 4, switching tube S2 and diode D1 conducting, switching tube S1, switching tube S3, switching tube
S4 and diode D2 ends, the electric current I of inductance L1L1Through switching tube S3 and diode D1 afterflow linear declines, switching tube S1 source electrodes
Inverter bridge output level be UA=0；
（2）Flow through the output current of load Ri o By the negative switching of forward direction
Mode of operation III：Refer to Fig. 5, the conducting of switching tube S3 body diodes, switching tube S1, switching tube S2, switching tube S4
With diode D1, diode D2 cut-off, switching tube S2 body diodes are under the induced electromotive force UB effects of the Same Name of Ends of inductance L2
Conducting, inductance L1 stored energy transfers to inductance L2, the electric current I of inductance L2L2Linear decline, the inverter bridge output of the Same Name of Ends of inductance L2
Level is UB=-Ud；
（3）Flow through the output current of load Ri o >0 negative half period
Mode of operation IV：Refer to Fig. 6, switching tube S3 conductings, switching tube S1, switching tube S2, switching tube S4 and diode
D1, diode D2 end, the electric current I of inductance L2L2Linear rise, switching tube S4 passes through with diode D2 branch road no currents, inductance
The inverter bridge output level of the Same Name of Ends of L2 is UB=-Ud；
Mode of operation V：Refer to Fig. 7, switching tube S4 and diode D2 conducting, switching tube S1, switching tube S2, switching tube
S3 and diode D1 ends, the electric current I of inductance L2L2Through switching tube S4 and diode D2 linear declines, the Same Name of Ends of inductance L2
Inverter bridge output level is UB=0；
（4）Flow through the output current of load Ri o Just switched by negative sense
Mode of operation VI：Refer to Fig. 8, the conducting of switching tube S1 body diodes, switching tube S2, switching tube S3, switching tube S4
With diode D1, diode D2 cut-off, switching tube S1 body diodes are under the induced electromotive force UA effects of the source electrode of switching tube S1
Conducting, inductance L2 stored energy transfers to inductance L1, the electric current I of inductance L1L1Linear decline, the inverter bridge output of the source electrode of switching tube S1
Level is UA=+Ud.
The foregoing is only preferred embodiment of the present utility model, it is all according to present utility model application the scope of the claims done it is equal
Deng change and modification, should all belong to covering scope of the present utility model.
Claims (1)
1. the integrated three-level dual-buck half-bridge inverter of a kind of magnetic, it is characterised in that：Including dc source Vd1, dc source
Vd2, diode D1, diode D2, switching tube S1, switching tube S2, switching tube S3, switching tube S4, by inductance L1 and inductance L2 groups
Into coupling inductance, output filter capacitor C and load R；The positive pole of dc source Vd1 is connected with the drain electrode of switching tube S1, switch
The source electrode of pipe S1 source electrode respectively with switching tube S2, the Same Name of Ends of inductance L1 are connected, the different name end of inductance L1 respectively with inductance L2
Different name end, one end of output filter capacitor C, one end connection of load R, the Same Name of Ends of inductance L2 is respectively with diode D2 just
Pole, the drain electrode connection of switching tube S3, the source electrode of switching tube S3 is connected with the negative pole of dc source Vd2, the drain electrode of switching tube S2 and
The negative pole connection of diode D1, the negative pole of diode D2 is connected with the source electrode of switching tube S4；The negative pole of dc source Vd1, direct current
The leakage of the positive pole of power supply Vd2, the positive pole of diode D1, the other end of output filter capacitor C, the other end of load and switching tube S4
Pole is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621327709.3U CN206226317U (en) | 2016-12-06 | 2016-12-06 | The integrated three-level dual-buck half-bridge inverter of magnetic |
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| CN201621327709.3U CN206226317U (en) | 2016-12-06 | 2016-12-06 | The integrated three-level dual-buck half-bridge inverter of magnetic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452154A (en) * | 2016-12-06 | 2017-02-22 | 福州大学 | Magnetic integration three-level dual-buck type half-bridge inverter and working mode thereof |
| CN107342700A (en) * | 2017-08-18 | 2017-11-10 | 西南石油大学 | A kind of new double step-down combining inverter for eliminating common mode leakage current |
| CN110492771A (en) * | 2019-07-12 | 2019-11-22 | 上海大学 | The smallest three-level inverter of Point Charge optimizes pulse method |
-
2016
- 2016-12-06 CN CN201621327709.3U patent/CN206226317U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452154A (en) * | 2016-12-06 | 2017-02-22 | 福州大学 | Magnetic integration three-level dual-buck type half-bridge inverter and working mode thereof |
| CN107342700A (en) * | 2017-08-18 | 2017-11-10 | 西南石油大学 | A kind of new double step-down combining inverter for eliminating common mode leakage current |
| CN107342700B (en) * | 2017-08-18 | 2019-02-01 | 西南石油大学 | A kind of double step-down combining inverter for eliminating common mode leakage current |
| CN110492771A (en) * | 2019-07-12 | 2019-11-22 | 上海大学 | The smallest three-level inverter of Point Charge optimizes pulse method |
| CN110492771B (en) * | 2019-07-12 | 2021-08-10 | 上海大学 | Optimized pulse method for three-level inverter with minimum midpoint charge |
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