CN103312204A - Inverter topology with wide input voltage range - Google Patents
Inverter topology with wide input voltage range Download PDFInfo
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- CN103312204A CN103312204A CN2012100803203A CN201210080320A CN103312204A CN 103312204 A CN103312204 A CN 103312204A CN 2012100803203 A CN2012100803203 A CN 2012100803203A CN 201210080320 A CN201210080320 A CN 201210080320A CN 103312204 A CN103312204 A CN 103312204A
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Abstract
The invention provides an inverter topology with wide input voltage range, belongs to a topology structure for converting direct current into alternating current and can be widely applied to an inverter with wide direct current input voltage change range. The invention provides a low-cost and simple topology and realizes the inverter with wide voltage input range. The topology has the basic structure that a high-frequency chopper switch, a flat wave energy storage inductor and an H-shaped reversing boosting bridge are connected in series, a follow current circuit strides over the flat wave energy storage inductor and an H bridge, at least two half bridge arms in four half bridge arms of the H bridge are unidirectional, and a middle point of the H bridge is the output of the inverter and is connected with a flat wave energy storage capacitor; when the direct current input voltage of a system is greater than the output alternating current voltage, the system works in a voltage reduction mode; when the direct current input voltage is smaller than the output alternating current voltage, the system works in a voltage boosting mode; and the H bridge realizes the voltage reversing. The topology has the advantages that the inversion of high input voltage is realized at low cost, and the topology can be applied to the field of photovoltaic inverters and the like with great input voltage range fluctuation.
Description
Technical field
The invention belongs to electric power unsteady flow field, is a kind of topological structure that direct current is transformed into alternating current, can be widely used in the wide inverter of DC input voitage excursion such as photovoltaic DC-to-AC converter, wind power generation inverter etc.
Background technology
Need to be reverse into direct current energy in the application of AC energy at some, the fluctuation of input direct voltage scope is very large, and such as photovoltaic combining inverter, the output voltage of photovoltaic battery panel is with illumination variation, and its fluctuation is very large.This just requires the thereafter input voltage of the inverter support wide region of level.For this situation, if use traditional bridge type inverse topology, it requires the input voltage of inverter will be higher than the peak values of ac voltage of desired output, so not only limited range of application, so and because the very large switching tube rated voltage selected in the bridge-type inverter of requiring of input voltage fluctuation is very high, so just increased the inverter cost.If the direct voltage scope of input can not be kept above the voltage peak that exchanges output, present normally used topology is two-layer configuration, and namely first boost boosts, again bridge type inverse.This scheme has complex structure, the high in cost of production shortcoming.
Summary of the invention
The present invention proposes a kind of inversion topological structure, the realization of innovation simple in structure, cheaply wide input voltage range inversion.
Topological structure (with reference to figure 1, Fig. 2, Fig. 3 and Fig. 4) and operation principle that the present invention adopts are:
Chopping switch (the S10 among Fig. 1 connects between the direct current input both positive and negative polarity, S20 among Fig. 2, S5 among Fig. 3 and Fig. 4 and S6), the flat ripple energy storage inductor (L10 among Fig. 1 and Fig. 2, L1 among Fig. 3 and Fig. 4 and L2) and the H type commutation bridge (S1 among Fig. 1 that boosts, S2, D2, S3, S4, the circuit that D4 forms, S1 among Fig. 2, D1, S2, D2, S3, the circuit that S4 forms, S1 among Fig. 3, D1, S2, S3, D3, the circuit that S4 forms, S1 among Fig. 4, S2, S3, D3, S4, the circuit that D4 forms, the hereinafter referred H type commutation bridge that boosts is the H bridge), freewheeling circuit (the D10 among Fig. 1 and Fig. 2 is arranged, D12 among Fig. 3, C5 among Fig. 4, C6, D5, the circuit that D6 forms) strides across flat ripple energy storage inductor and H bridge, the electric current of flat ripple energy storage inductor can pass through the freewheeling circuit afterflow when chopping switching tube turn-offs, the interchange output of inversion between the mid point of two brachium pontis of H bridge, and be connected with flat ripple storage capacitor (Fig. 1, Fig. 2, Fig. 3, C2 among Fig. 4), four and half brachium pontis of H bridge have switching tube (Fig. 1 above each, Fig. 2, S1 among Fig. 3 and Fig. 4, S2, S3, S4), and at least wherein two half adjacent brachium pontis are arranged is unidirectional; Unidirectional half brachium pontis implementation has multiple, such as adopting the switching tube series diode to realize, adopt thyristor to realize, adopt the switching tube realization of anti-reverse voltage etc.
During system works, when the AC wave shape magnitude of voltage of inversion output during less than the direct voltage of input, system is in decompression mode.At this moment, chopping switch is in the HF switch state, and the H bridge is in commutation states; The fluctuation of Duty ratio control output voltage waveforms by the modulation chopping switch; Two diagonal angle switching tubes on the H bridge are opened, two diagonal angle switching tubes turn-off, and realize the conversion of output voltage polarity by the on off state that switches these two pairs of switching tubes.
During system works, when the AC wave shape magnitude of voltage of inversion output during greater than the direct voltage of input, system is in boost mode.At this moment, chopping switch is in opening state, and the H bridge is in commutation and boost switching state; One group of diagonal angle switching tube of H bridge is in opening state, one in two switching tubes in other one group of diagonal angle is in off state, one is in HF switch state (claiming again that here the pipe that is in the HF switch state this moment is the boosted switch pipe), the condition of making the boosted switch pipe is must be unidirectional with it with another one half brachium pontis of the direct current input utmost point, prevents that the flat ripple storage capacitor of outlet side from forming discharge between brachium pontis; The flat ripple energy storage inductor of boosted switch pipe and prime, the storage capacitor of outlet side forms the Boost booster circuit, controls the fluctuation of output voltage waveforms by the duty cycle of switching of adjusting this HF switch pipe.
In the topology of present principles, chopping switch peace ripple energy storage inductor is that different purposes can have three kinds of modes of emplacements (hereinafter referred to as copped wave modes of emplacement).The first copped wave modes of emplacement (with reference to figure 1) is the one-sided modes of emplacement of single chopping switch peace ripple energy storage inductor, namely adopts a chopping switch and a flat ripple energy storage inductor, and their series connection are placed on same extremely the going up of direct current input; The second copped wave modes of emplacement (with reference to figure 2) is single chopping switch peace ripple energy storage inductor offside modes of emplacement, adopt a chopping switch and a flat ripple energy storage inductor, but they are not placed on same input and extremely go up, and one is placed on side of the positive electrode, and one is placed on negative side; The third copped wave modes of emplacement (with reference to figure 3 and Fig. 4) is the symmetrical modes of emplacements of two chopping switch peace ripple energy storage inductors, adopt two groups of chopping switch peace ripple energy storage inductors, the series connection of one group of chopping switch peace ripple energy storage inductor is placed on the side of the positive electrode of direct current input, and other one group of series connection is placed on the negative side of direct current input.The first and the second copped wave modes of emplacement are simple in structure, but owing to being dissymmetrical structure, so the problem of common mode disturbances is arranged, do not have common mode disturbances output between direct current input and the interchange output when benefit of the third copped wave modes of emplacement is system's operation.
In the topology of present principles, the freewheeling circuit of flat ripple energy storage inductor has dual mode according to different copped wave modes of emplacements.The first is direct afterflow mode (with reference to figure 1, Fig. 2, Fig. 3), namely strides across flat ripple energy storage inductor and H bridge and directly connects diode (D10 among Fig. 1 and Fig. 2, the D12 among Fig. 3); The second is neutral-point-clamped afterflow mode (with reference to figure 4), stride across flat ripple energy storage inductor and H bridge by two diode series connection (D5 among Fig. 4 and D6), the mid point of two diodes is connected with electric capacity (C5 among Fig. 4 and the C6) mid point of two series connection of power input.Neutral-point-clamped afterflow mode is generally used in the symmetrical modes of emplacement of two chopping switch peace ripple energy storage inductors.
In the topology of present principles, H type commutation is boosted in the bridge, and it is unidirectional that two half adjacent brachium pontis will be arranged in four and half brachium pontis at least, this be for system works when the boost mode, prevent the positive and negative intereelectrode short-circuit of flat ripple storage capacitor of outlet side.The configuration mode of unidirectional half brachium pontis has three kinds: all at direct current negative side (with reference to figure 1); All at direct-flow positive pole side (with reference to figure 3); Each one at direct-flow positive pole and negative pole, namely two unidirectional half brachium pontis are positioned at (with reference to figure 2 and Fig. 4) on the same brachium pontis.
The invention has the beneficial effects as follows: the present invention has reduced the EMI of system with simple topology, realized the electric energy inversion of wide input voltage range also can realizing the input without common mode disturbances simultaneously cheaply.
Description of drawings
This specification has eight accompanying drawings:
Fig. 1, the inverter topology schematic diagram one of wide input voltage range adopts the one-sided placement of single chopping switch peace ripple energy storage inductor, unidirectional half brachium pontis downside modes of emplacement;
Fig. 2, the inverter topology schematic diagram two of wide input voltage range adopts the placement of single chopping switch peace ripple energy storage inductor offside, the left brachium pontis modes of emplacement of unidirectional half brachium pontis;
Fig. 3, the inverter topology schematic diagram three of wide input voltage range adopts the symmetrical placement of two chopping switch peace ripple energy storage inductors, directly afterflow, unidirectional half brachium pontis upside modes of emplacement;
Fig. 4, the inverter topology schematic diagram four of wide input voltage range adopts the symmetrical placement of two chopping switch peace ripple energy storage inductor, neutral-point-clamped afterflow, the right brachium pontis modes of emplacement of unidirectional half brachium pontis;
Fig. 5 exchanges output positive half wave, the mode of operation when output voltage forces down than input dc power;
Fig. 6 exchanges output positive half wave, the mode of operation when output voltage is higher than input direct voltage;
Fig. 7 exchanges the negative half-wave of output, the mode of operation when output voltage forces down than input dc power;
Fig. 8 exchanges the negative half-wave of output, the mode of operation when output voltage is higher than input direct voltage;
Embodiment
Fig. 5, Fig. 6, Fig. 7, Fig. 8 are four kinds of mode of operations when using the wide input voltage range inversion that inversion topological of the present invention realizes.Fig. 5 and Fig. 6 are the situations when inverter output AC positive half wave, and Fig. 7 and Fig. 8 are the situations when the negative half-wave of inverter output AC.
When inverter output AC positive half wave and output voltage values are lower than DC input voitage (Fig. 5), chopping switching tube is in the HF switch state, and reversing switch S2 and S3 remain on opening state, and reversing switch S1 and S4 remain on off state.At this moment, system realizes the fluctuation of output voltage V out is changed by the duty cycle of switching of control chopping switching tube.
When inverter output AC positive half wave and output voltage values are higher than DC input voitage (Fig. 6), chopping switching tube remains on opening state, reversing switch S2 and S3 remain on opening state, reversing switch S1 remains on off state, at this moment reversing switch S4 uses as the boosted switch pipe, and it is in the HF switch state.At this moment, system realizes the fluctuation of output voltage V out is changed by the duty cycle of switching of control boosted switch pipe S4.
When the negative half-wave of inverter output AC and output voltage values are low than DC input voitage (Fig. 7), chopping switching tube is in the HF switch state, and reversing switch S1 and S4 remain on opening state, and reversing switch S2 and S3 remain on off state.At this moment, system realizes the fluctuation of output voltage V out is changed by the duty cycle of switching of control chopping switching tube.
When the negative half-wave of inverter output AC and output voltage values are high than DC input voitage (Fig. 8), chopping switching tube remains on opening state, reversing switch S1 and S4 remain on opening state, reversing switch S2 remains on off state, at this moment reversing switch S3 uses as the boosted switch pipe, and it is in the HF switch state.At this moment, system realizes the fluctuation of output voltage V out is changed by the duty cycle of switching of control boosted switch pipe S3.
By above-mentioned these four kinds of mode of operations, the present invention has realized the wide region inversion of direct current input than traditional two-stage type topology mode simpler, that cost is lower.
Claims (9)
1. the inverter topology of wide input voltage range, realized that be alternating current to dc inverter, chopping switch, flat ripple energy storage inductor and the H type commutation that it is characterized in that connecting between the direct current input both positive and negative polarity bridge that boosts, there is freewheeling circuit to stride across flat ripple energy storage inductor and H bridge, four and half brachium pontis of H bridge have switching tube above each, and it is unidirectional that two adjacent half brachium pontis are at least wherein arranged, and is the interchange output of inversion between the mid point of two brachium pontis of H bridge, and is connected with flat ripple storage capacitor.
2. the inverter topology of wide input voltage range according to claim 1, the chopping switch peace ripple energy storage inductor that it is characterized in that it has three kinds of modes of emplacements, is respectively the one-sided modes of emplacement of single chopping switch peace ripple energy storage inductor, single chopping switch peace ripple energy storage inductor offside modes of emplacement, the symmetrical modes of emplacement of two chopping switch peace ripple energy storage inductor.
According to claim 1 with the inverter topology of wide input voltage range claimed in claim 2, it is characterized in that the one-sided modes of emplacement of described single chopping switch peace ripple energy storage inductor is to adopt a chopping switch and a flat ripple energy storage inductor, their series connection are placed on the same utmost point side of direct current input.
According to claim 1 with the inverter topology of wide input voltage range claimed in claim 2, it is characterized in that described single chopping switch peace ripple energy storage inductor offside modes of emplacement is to adopt a chopping switch and a flat ripple energy storage inductor, a side of the positive electrode that is placed on the direct current input, a negative side that is placed on the direct current input.
According to claim 1 with the inverter topology of wide input voltage range claimed in claim 2, it is characterized in that the described pair of symmetrical modes of emplacement of chopping switch peace ripple energy storage inductor is to adopt two groups of chopping switch peace ripple energy storage inductors, the series connection of one group of chopping switch peace ripple energy storage inductor is placed on the side of the positive electrode of direct current input, and other one group of series connection is placed on the negative side of direct current input.
According to claim 1 with the inverter topology of wide input voltage range claimed in claim 5, it is characterized in that the freewheeling circuit of flat ripple energy storage inductor has dual mode, the first is direct afterflow, namely strides across flat ripple energy storage inductor and H bridge and directly connects diode; The second is the neutral-point-clamped afterflow, strides across flat ripple energy storage inductor and H bridge by two diode series connection, and the electric capacity mid point of two series connection of the mid point of two diodes and power input is connected.
According to claim 1 with the inverter topology of wide input voltage range claimed in claim 6, it is characterized in that described two kinds of freewheeling circuits can adopt separately wherein a kind of, also can exist simultaneously.
8. the inverter topology of wide input voltage range according to claim 1, it is characterized in that when input voltage is higher than output AC voltage, system is in decompression mode, at this moment chopping switch is in the HF switch state, the H bridge is in commutation states, and two diagonal angle switching tubes of H bridge are opened, two diagonal angle switching tubes turn-off.
9. the inverter topology of wide input voltage range according to claim 1, it is characterized in that when input voltage is lower than output AC voltage, system is in boost mode, at this moment chopping switch is in opening state, the H bridge is in commutation and pressure-increasning state, and one group of diagonal angle switching tube of H bridge is in opening state, and one in two switching tubes in the other one group of diagonal angle of H bridge is in off state, one is in the HF switch state, and the latter is unidirectional with adjacent half brachium pontis of the direct current input utmost point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100803203A CN103312204A (en) | 2012-03-17 | 2012-03-17 | Inverter topology with wide input voltage range |
| PCT/CN2012/001417 WO2013134904A1 (en) | 2012-03-12 | 2012-10-23 | Single-phase inverter topology without common-mode interference |
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| CN2012100803203A CN103312204A (en) | 2012-03-17 | 2012-03-17 | Inverter topology with wide input voltage range |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490635A (en) * | 2013-10-09 | 2014-01-01 | 南京集能易新能源技术有限公司 | Improved H bridge buck-boost DC converter and control method thereof |
| CN108964497A (en) * | 2017-05-19 | 2018-12-07 | 丰郅(上海)新能源科技有限公司 | Inhibit the inversion system of common mode interference |
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| US20090316458A1 (en) * | 2006-07-31 | 2009-12-24 | Ingeteam Energy, S.A. | Single-phase inverter circuit to condition and transform direct current electric power into alternating current electric power |
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2012
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2476898Y (en) * | 2000-10-18 | 2002-02-13 | 深圳市中兴通讯股份有限公司 | All-bridge phase-shift zero-pressure zero-current device with improved structure |
| DE102005047373A1 (en) * | 2005-09-28 | 2007-04-05 | Schekulin, Dirk, Dr. Ing. | Low-setting plate circuit consists of input and output connections with main branches between them as well as input-side condenser and output-side diode series connections |
| US20090316458A1 (en) * | 2006-07-31 | 2009-12-24 | Ingeteam Energy, S.A. | Single-phase inverter circuit to condition and transform direct current electric power into alternating current electric power |
| CN101132154A (en) * | 2006-08-25 | 2008-02-27 | 塞米克朗电子有限及两合公司 | Power converter circuit and method for feeding into the mains from a DC source with a non constant DC |
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| CN201976027U (en) * | 2011-03-10 | 2011-09-14 | 清华大学 | Phase tracking circuit of induction heating power supply with inverse piezoelectric limiting effect on switching device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490635A (en) * | 2013-10-09 | 2014-01-01 | 南京集能易新能源技术有限公司 | Improved H bridge buck-boost DC converter and control method thereof |
| CN108964497A (en) * | 2017-05-19 | 2018-12-07 | 丰郅(上海)新能源科技有限公司 | Inhibit the inversion system of common mode interference |
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