CN102820801A - Multi-level inverter and control method thereof - Google Patents
Multi-level inverter and control method thereof Download PDFInfo
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- CN102820801A CN102820801A CN2012103057197A CN201210305719A CN102820801A CN 102820801 A CN102820801 A CN 102820801A CN 2012103057197 A CN2012103057197 A CN 2012103057197A CN 201210305719 A CN201210305719 A CN 201210305719A CN 102820801 A CN102820801 A CN 102820801A
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Abstract
The embodiment of the invention provides a multi-level inverter and a control method thereof. The inverter comprises a BOOST positive-boosting circuit, a BOOST negative-boosting circuit, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube, a tenth switching tube, a resonant capacitor, a resonant inductor and a load, wherein the load is connected between a first node and a ground wire; and the first switching tube, the second switching tube, the resonant capacitor and the resonant inductor which are connected in series are connected between the first node and the ground wire. According to the embodiment of the invention, the zero current turnon and cutoff of the multi-level inverter can be realized.
Description
Technical field
The embodiment of the invention relates to electric and electronic technical field, relates in particular to a kind of multi-electrical level inverter and control method thereof.
Background technology
Inverter (inverter) is transformed into alternating current to direct current energy.The application of inverter very extensively.In existing various power supplys, solar cell, storage battery, dry cell etc. all are DC power supplys, when these power supplys of needs when AC load is supplied power, just need inverter circuit.In addition, ac motor speed control uses very extensively with power electronic equipments such as frequency converter, uninterrupted power supply, induction heating powers, and the core of its circuit all is an inverter circuit.
If the inverter output end phase voltage has two kinds of level, sort circuit is called the two-level inversion device.If the inverter output end phase voltage has two or more level, sort circuit is called multi-electrical level inverter.Multi-electrical level inverter can carry higher voltage, and exports the approaching more sine wave of waveform of multiple level.
But the power switch pipe of many level switches of prior art pipe is operated in the hard switching state, has higher voltage stress at the main switch two ends, can't realize that zero point stream is open-minded, and zero-current switching has limited one step of progress of system effectiveness to a certain extent and improved.
Summary of the invention
The embodiment of the invention provides a kind of multi-electrical level inverter and control method thereof, to realize zero current turning-on, the zero-current switching of multi-electrical level inverter.
On the one hand, the embodiment of the invention provides a kind of multi-electrical level inverter, and said inverter comprises: the positive booster circuit of BOOST, the negative booster circuit of BOOST; First switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, resonant capacitance, resonant inductance, load; Said the 9th switching tube and said the tenth switching tube of differential concatenation are connected between ground wire and the first node; Said the 3rd switching tube is connected between the output and said first node of the positive booster circuit of said BOOST; Said the 4th switching tube is connected between the output and said first node of the negative booster circuit of said BOOST; Said the 5th switching tube of differential concatenation and said the 7th switching tube are connected between the input and said first node of the positive booster circuit of said BOOST, being connected in switching tube and said the 6th switching tube between the input and said first node of the negative booster circuit of said BOOST of differential concatenation saidly; Said load is connected between said first node and the ground wire; Said first switching tube, said second switch pipe, said resonant capacitance and the said resonant inductance of series connection are connected between said first node and the ground wire.
In first kind of first aspect possible implementation, said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are the IGBT pipes.
In conjunction with first aspect or first kind of possible implementation; In second kind of possible implementation, said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are metal-oxide-semiconductors.
In conjunction with first aspect or above-mentioned any possible implementation; In the third possible implementation; Said inverter also comprises first switch, second switch; Said first switch in parallel is between the output of the input of the positive booster circuit of said BOOST and the positive booster circuit of said BOOST, and said second switch is parallel between the output of input and the negative booster circuit of said BOOST of the negative booster circuit of said BOOST.
Second aspect, the embodiment of the invention provide a kind of method that above-mentioned multi-electrical level inverter turn-offs of controlling.Said method comprises: open said first switching tube, said second switch pipe, if said the 3rd switching tube electric current reduces to zero, turn-off said the 3rd switching tube; Perhaps, open said first switching tube, said second switch pipe,, turn-off said the 4th switching tube if said the 4th switching tube electric current reduces to zero; Perhaps, open said first switching tube, said second switch pipe and said the 7th switching tube,, turn-off said the 5th switching tube if said the 5th switching tube electric current reduces to zero; Perhaps, open said first switching tube, said second switch pipe and said the 6th switching tube, reduce to zero, turn-off said the 8th switching tube if said octavo is closed tube current.
The third aspect, the embodiment of the invention provide a kind of method that above-mentioned multi-electrical level inverter is opened of controlling.Said method comprises: open said first switching tube, said second switch pipe, open said the 3rd switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 4th switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 5th switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 8th switching tube.
The embodiment of the invention, forms and inverter switching device tube current electric current in the opposite direction when turn-offing the inverter switching device pipe through resonant capacitance, resonant inductance, first switch, second switch branch road, to realize the zero-current switching of inverter switching device pipe.When opening the inverter switching device pipe, start from scratch through the electric current of control resonant capacitance, resonant inductance, first switch, second switch branch road and to rise gradually, thereby realize the zero current turning-on of inverter switching device pipe.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the circuit structure diagram of an embodiment of multi-electrical level inverter of the present invention;
Fig. 2 is the circuit structure diagram of another embodiment of multi-electrical level inverter of the present invention;
Fig. 3 is the circuit structure diagram of another embodiment of multi-electrical level inverter of the present invention;
Fig. 4 is the circuit structure diagram of another embodiment of multi-electrical level inverter of the present invention;
The method flow diagram that Fig. 5 turn-offs for embodiment of the invention control multi-electrical level inverter; (a) be the flow chart of an embodiment of control multi-electrical level inverter cut-off method; (b) be the flow chart of an embodiment of control multi-electrical level inverter cut-off method; (c) being the flow chart of an embodiment of control multi-electrical level inverter cut-off method, (d) is the flow chart of an embodiment of control multi-electrical level inverter cut-off method;
The method flow diagram that Fig. 6 opens for embodiment of the invention control multi-electrical level inverter.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
The embodiment of the invention provides a kind of multi-electrical level inverter, and is of accompanying drawing 1.Said inverter comprises: the positive booster circuit of BOOST, the negative booster circuit of BOOST; First switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, resonant capacitance, resonant inductance, load;
Said the 9th switching tube and said the tenth switching tube of differential concatenation are connected between ground wire and the first node; Said the 3rd switching tube is connected between the output and said first node of the positive booster circuit of said BOOST; Said the 4th switching tube is connected between the output and said first node of the negative booster circuit of said BOOST; Said the 5th switching tube of differential concatenation and said the 7th switching tube are connected between the input and said first node of the positive booster circuit of said BOOST, being connected in switching tube and said the 6th switching tube between the input and said first node of the negative booster circuit of said BOOST of differential concatenation saidly; Said load is connected between said first node and the ground wire; Said first switching tube, said second switch pipe, said resonant capacitance and the said resonant inductance of series connection are connected between said first node and the ground wire.
Wherein, said the 9th switching tube and said the tenth switching tube of differential concatenation specifically are the current opposite in direction of said the 9th switching tube and said the tenth switching tube forward work.
Occlusion body diode in said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, said body diode and switching tube are reverse.
Wherein, the positive booster circuit of BOOST, the negative booster circuit of BOOST are used for input voltage is boosted.When the 3rd switching tube was opened, the voltage at first node place was identical with the output of the positive booster circuit of BOOST.When the 5th switching tube and the 7th switching tube were opened, the voltage at said first node place was identical with the input of the positive booster circuit of BOOST.In like manner, the voltage at said first node place also can be identical with output, the ground wire of the input of the negative booster circuit of BOOST, the negative booster circuit of BOOST.Constitute five-electrical level inverter thus.
In one embodiment of the invention; Said inverter also comprises first switch, second switch; Said first switch in parallel is between the output of the input of the positive booster circuit of said BOOST and the positive booster circuit of said BOOST, and said second switch is parallel between the output of input and the negative booster circuit of said BOOST of the negative booster circuit of said BOOST.
When first switch closure, the 3rd switching tube is connected in the input of the positive booster circuit of BOOST.When the second switch pipe was closed, the 4th switching tube was connected in the input of the negative booster circuit of BOOST.Through independent closed first switch, perhaps independent closed second switch constitutes four electrical level inverters.Closed first switch and second switch constitute three-level inverter simultaneously.When input voltage is high, be not suitable for boosting through the positive booster circuit of BOOST, the negative booster circuit of BOOST, closed first switch, second switch, thus constitute three-level inverter.
In one embodiment of the invention, shown in accompanying drawing 2.Said first switch, said second switch are diodes.
In one embodiment of the invention, shown in accompanying drawing 3.Said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are IGBT pipes (Insulated-gate Bipolar Transistor, insulated gate bipolar transistor).
In one embodiment of the invention, shown in accompanying drawing 4.Said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are metal-oxide-semiconductor (Metal Oxide Semiconductor, insulating gate type field effect tubes).
Said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube can also be GRT (Giant Transistor; Huge thyristor), GTO (Gate-turn-off Thyristor, gate level turn-off thyristor) waits other switching tubes.
The embodiment of the invention provides a kind of method that the above-mentioned arbitrary multi-electrical level inverter of claim turn-offs of controlling, and is as shown in Figure 5.Said method comprises: S501 opens said first switching tube, said second switch pipe, and S503 turn-offs said the 3rd switching tube if said the 3rd switching tube electric current reduces to zero;
Perhaps, S501 opens said first switching tube, said second switch pipe, and S503 turn-offs said the 4th switching tube if said the 4th switching tube electric current reduces to zero;
Perhaps, S501 opens said first switching tube, said second switch pipe and said the 7th switching tube, and S503 turn-offs said the 5th switching tube if said the 5th switching tube electric current reduces to zero;
Perhaps, S501 opens said first switching tube, said second switch pipe and said the 6th switching tube, and S503 reduces to zero if said octavo is closed tube current, turn-offs said the 8th switching tube.
Before turn-offing said the 3rd switching tube; Open said first switching tube, said second switch pipe; The electric current on the resonant capacitance resonant inductive branch and the current opposite in direction of the 3rd switching tube; Thereby pressure is reduced to after zero through the electric current of said the 3rd switching tube, thereby realizes the zero-current switching of the 3rd switching tube switch.In like manner, can realize the zero-current switching of the 4th switching tube, the 5th switching tube, the 8th switching tube.
Said first switching tube, said second switch pipe pass through and the series connection of said resonant capacitance resonant inductive branch, can realize zero-current switching.
The embodiment of the invention provides a kind of method that the above-mentioned arbitrary multi-electrical level inverter of claim is opened of controlling, and is as shown in Figure 6.Said method comprises: S601 opens said first switching tube, said second switch pipe, and S603 opens said the 3rd switching tube;
Perhaps, open said first switching tube, said second switch pipe, open said the 4th switching tube;
Perhaps, open said first switching tube, said second switch pipe, open said the 5th switching tube;
Perhaps, open said first switching tube, said second switch pipe, open said the 8th switching tube.
Before opening said the 3rd switching tube, open said first switching tube, said second switch pipe, the electric current on the resonant capacitance resonant inductive branch is started from scratch and is risen gradually, thereby can realize the zero current turning-on of the 3rd switching tube.In like manner,, can realize the zero current turning-on of the 4th switching tube, the 5th switching tube, the 8th switching tube.
When the person in charge opened, resonance branch road transfer portion freewheel current can reduce certain turn-on consumption.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (6)
1. a multi-electrical level inverter is characterized in that, said inverter comprises: the positive booster circuit of BOOST, the negative booster circuit of BOOST; First switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, resonant capacitance, resonant inductance, load;
Said the 9th switching tube and said the tenth switching tube of differential concatenation are connected between ground wire and the first node; Said the 3rd switching tube is connected between the output and said first node of the positive booster circuit of said BOOST; Said the 4th switching tube is connected between the output and said first node of the negative booster circuit of said BOOST; Said the 5th switching tube of differential concatenation and said the 7th switching tube are connected between the input and said first node of the positive booster circuit of said BOOST, being connected in switching tube and said the 6th switching tube between the input and said first node of the negative booster circuit of said BOOST of differential concatenation saidly; Said load is connected between said first node and the ground wire; Said first switching tube, said second switch pipe, said resonant capacitance and the said resonant inductance of series connection are connected between said first node and the ground wire.
2. multi-electrical level inverter according to claim 1; It is characterized in that said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are the IGBT pipes.
3. multi-electrical level inverter according to claim 1; It is characterized in that said first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube are metal-oxide-semiconductors.
4. according to each described multi-electrical level inverter of claim 1 to 3; It is characterized in that; Said inverter also comprises first switch, second switch; Said first switch in parallel is between the output of the input of the positive booster circuit of said BOOST and the positive booster circuit of said BOOST, and said second switch is parallel between the output of input and the negative booster circuit of said BOOST of the negative booster circuit of said BOOST.
5. control the method that each said multi-electrical level inverter of claim 1 to 4 turn-offs for one kind; It is characterized in that; Said method comprises: open said first switching tube, said second switch pipe, if said the 3rd switching tube electric current reduces to zero, turn-off said the 3rd switching tube; Perhaps, open said first switching tube, said second switch pipe,, turn-off said the 4th switching tube if said the 4th switching tube electric current reduces to zero; Perhaps, open said first switching tube, said second switch pipe and said the 7th switching tube,, turn-off said the 5th switching tube if said the 5th switching tube electric current reduces to zero; Perhaps, open said first switching tube, said second switch pipe and said the 6th switching tube, reduce to zero, turn-off said the 8th switching tube if said octavo is closed tube current.
6. control the method that each said multi-electrical level inverter of claim 1 to 4 is opened for one kind, it is characterized in that said method comprises: open said first switching tube, said second switch pipe, open said the 3rd switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 4th switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 5th switching tube; Perhaps, open said first switching tube, said second switch pipe, open said the 8th switching tube.
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Cited By (8)
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| WO2015131763A1 (en) * | 2014-03-06 | 2015-09-11 | Huawei Technologies Co., Ltd. | Multilevel hybrid inverter and operating method |
| EP2846453A4 (en) * | 2013-06-24 | 2016-01-27 | Huawei Tech Co Ltd | Single-phase inverter and three-phase inverter |
| CN105450065A (en) * | 2015-12-22 | 2016-03-30 | 深圳茂硕电气有限公司 | Parallel combined multi-level inverter circuit |
| CN105978332A (en) * | 2016-05-13 | 2016-09-28 | 重庆大学 | IPOS four-level Boost converter and midpoint potential balance control thereof |
| CN106031010A (en) * | 2014-03-17 | 2016-10-12 | 华为技术有限公司 | Multilevel Inverter Device and Operating Method |
| CN108566094A (en) * | 2017-12-25 | 2018-09-21 | 华为技术有限公司 | The control method and system of a kind of controlled resonant converter, controlled resonant converter |
| CN111345889A (en) * | 2020-03-30 | 2020-06-30 | 四川锦江电子科技有限公司 | Pulse generation circuit applied to pulsed electric field ablation technology and control method |
| CN112187082A (en) * | 2020-11-13 | 2021-01-05 | 国网福建省电力有限公司 | Novel high-gain eight-switch nine-level inverter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2846453A4 (en) * | 2013-06-24 | 2016-01-27 | Huawei Tech Co Ltd | Single-phase inverter and three-phase inverter |
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| CN105450065A (en) * | 2015-12-22 | 2016-03-30 | 深圳茂硕电气有限公司 | Parallel combined multi-level inverter circuit |
| CN105978332A (en) * | 2016-05-13 | 2016-09-28 | 重庆大学 | IPOS four-level Boost converter and midpoint potential balance control thereof |
| CN105978332B (en) * | 2016-05-13 | 2019-04-16 | 重庆大学 | Tetra- level Boost converter of IPOS and its neutral-point-potential balance control |
| CN108566094A (en) * | 2017-12-25 | 2018-09-21 | 华为技术有限公司 | The control method and system of a kind of controlled resonant converter, controlled resonant converter |
| US11159089B2 (en) | 2017-12-25 | 2021-10-26 | Huawei Technologies Co., Ltd. | Resonant converter, resonant converter control method, and system |
| CN108566094B (en) * | 2017-12-25 | 2022-08-26 | 华为数字能源技术有限公司 | Resonant converter, and control method and system of resonant converter |
| CN111345889A (en) * | 2020-03-30 | 2020-06-30 | 四川锦江电子科技有限公司 | Pulse generation circuit applied to pulsed electric field ablation technology and control method |
| CN111345889B (en) * | 2020-03-30 | 2021-03-02 | 四川锦江电子科技有限公司 | Pulse generation circuit applied to pulsed electric field ablation technology and control method |
| CN112187082A (en) * | 2020-11-13 | 2021-01-05 | 国网福建省电力有限公司 | Novel high-gain eight-switch nine-level inverter |
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Application publication date: 20121212 |