CN202872683U - Cascade five-level output diode clamped bridge type frequency converter - Google Patents
Cascade five-level output diode clamped bridge type frequency converter Download PDFInfo
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- CN202872683U CN202872683U CN 201220483699 CN201220483699U CN202872683U CN 202872683 U CN202872683 U CN 202872683U CN 201220483699 CN201220483699 CN 201220483699 CN 201220483699 U CN201220483699 U CN 201220483699U CN 202872683 U CN202872683 U CN 202872683U
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Abstract
The utility model discloses a cascade five-level output diode clamped bridge type frequency converter. The frequency converter comprises multiple five-level output frequency converter units having the same structure, wherein each five-level output frequency converter unit consists of eight controllable switches having the same structure, and four diodes; every four controllable switches are connected in series to form a switch series circuit; positive electrodes and negative electrodes of every two diodes are connected in series in an end-to-end manner to form a diode series circuit; two ends of each diode series circuit are connected respectively with two nodes on two sides of a center node of each switch series circuit; two ends of a first switch series circuit and a second switch series circuit after being connected in parallel serves as power output ends of a corresponding five-level output frequency converter unit; center nodes of switch series circuits of adjacent five-level output frequency converter units are connected; and center nodes of switch series circuits of the first five-level output frequency converter unit and the last five-level output frequency converter unit serve as two ends of a power input end. The cascade five-level output diode clamped bridge type frequency converter is easy to modularize and is suitable for interfaces of a power grid.
Description
Technical field
The utility model relates to a kind of frequency converter, relates in particular to a kind of cascade 5 level output diode clamp bridge-type frequency converter that is easy to realize modular construction.
Background technology
Depth development along with modern industry, the application of high-power current converting device in national economy is more and more extensive, such as large-capacity transducer, high-power electric active filter, static passive compensation device, MW level wind-powered electricity generation unit with current transformer etc., and for the high-power converter occasion, often exist contradiction between the power handling capability of high-power switch device and the switching frequency, the larger switching frequency of power is lower usually.Because the restriction of switching frequency is difficult to use the performance that the PWM technology is improved the large capacity current transformer of tradition.Therefore, in the high-power converter occasion, people often wish that high-power, high voltage bearing power electronic equipment can be operated under the high as far as possible switching frequency, in order to improve the quality of output waveform.
Common inverter is also referred to as two level converters usually, this topological structure is fairly simple, high-power in order to obtain, the general switching device that relies on connects to bear high pressure, bearing large electric current, but because the discreteness of power device parameter, this will bring the series of problems such as quiet, dynamic voltage balancing and current-sharing with the switching device parallel connection, technical uncertain factor impact is very large, and reliability is not high; But because output only has two level, voltage fluctuation is large, produces larger harmonic wave.Therefore this structure applications scope is very limited.
Summary of the invention
The purpose of this utility model provides a kind of cascade 5 level output diode clamp bridge-type frequency converter that is easy to realize modular construction with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
Cascade 5 level output diode clamp bridge-type frequency converter described in the utility model comprises the five level output frequency converter unit that a plurality of structures are identical, the structure of each described five level output frequency converter unit is: be made of eight identical gate-controlled switch and four diodes of structure, wherein four described gate-controlled switch series connection are the first switch series circuit, other four described gate-controlled switch series connection are the second switch series circuit, it is the first diode series circuit that the both positive and negative polarity of two described diodes is connected from beginning to end, it is the second diode series circuit that the both positive and negative polarity of two other described diode is connected from beginning to end, the two ends of described the first diode series circuit are connected with two nodes of the Centroid both sides of described the first switch series circuit respectively, the two ends of described the second diode series circuit are connected with two nodes of the Centroid both sides of described second switch series circuit respectively, two ends after described the first switch series circuit and the parallel connection of described second switch series circuit are the power output end that corresponding described five level are exported frequency converter unit, and the power output end of each described five level output frequency converter unit is separate; Syndeton between the adjacent described five level output frequency converter unit is: the Centroid of the first switch series circuit of previous described five level output frequency converter unit is connected with the Centroid of the second switch series circuit of rear described five a level output frequency converter unit; The Centroid of the first switch series circuit of the Centroid of the second switch series circuit of first described five level output frequency converter unit and last described five level output frequency converter unit is respectively the two ends of the power input of described cascade 5 level output diode clamp bridge-type frequency converter.
Particularly, described gate-controlled switch comprises a triode and a diode, the emitter of described triode is connected with the positive pole of described diode, the collector electrode of described triode is connected with the negative pole of described diode, the first end of the very described gate-controlled switch of the emission of described triode, the second end of the very described gate-controlled switch of the current collection of described triode, the base stage of described triode are the control input end of described gate-controlled switch.
The beneficial effects of the utility model are:
The utility model is by carrying out cascade to a plurality of five level output frequency converter units, each five level output frequency converter unit is realized the output of five kinds of varying levels, thereby finish the frequency-conversion processing of AC power and multistage string, and control, have required device quantity few, be easy to modular advantage, be suitable as the frequency converter of electrical network interface; The simultaneously selection by the diode pair redundant state keeps balance, forms the clamp control to output voltage.
Description of drawings
Fig. 1 is the electrical block diagram of cascade 5 level output diode clamp bridge-type frequency converter described in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, cascade 5 level output diode clamp bridge-type frequency converter described in the utility model comprises the five level output frequency converter unit that a plurality of structures are identical, and each five level output frequency converter unit consists of by eight identical gate-controlled switch and four diodes of structure.There is shown two five level output frequency converter units, the connecting line with dashed lines between two five level output frequency converter units, expression can also have more five level output frequency converter unit to interconnect.The below only is further described the utility model with the structure of two five level output frequency converter units shown in scheming:
As shown in Figure 1, the structure of first five level output frequency converter unit (the five level output frequency converter unit above namely among the figure) is: by the first controllable switch S 1, the second controllable switch S 2, the 3rd controllable switch S 3, the 4th controllable switch S 4, the 5th controllable switch S 5, the 6th controllable switch S 6, the 7th controllable switch S 7, the 8th controllable switch S 8, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 consist of, wherein, the first controllable switch S 1, the 3rd controllable switch S 3, the 5th controllable switch S 5 and 7 series connection of the 7th controllable switch S are the first switch series circuit of first five level output frequency converter unit, the second controllable switch S 2, the 4th controllable switch S 4, the 6th controllable switch S 6 and 8 series connection of the 8th controllable switch S are the second switch series circuit of first five level output frequency converter unit, the both positive and negative polarity of the first diode D1 and the second diode D2 is connected from beginning to end and is the first diode series circuit of first five level output frequency converter unit, the both positive and negative polarity of the 3rd diode D3 and the 4th diode D4 is connected from beginning to end and is the second diode series circuit of first five level output frequency converter unit, the two ends of the first diode series circuit of first five level output frequency converter unit are connected with two nodes of the Centroid both sides of the first switch series circuit of first five level output frequency converter unit respectively, the two ends of the second diode series circuit of first five level output frequency converter unit are connected with two nodes of the Centroid both sides of the second switch series circuit of first five level output frequency converter unit respectively, and the two ends after the second switch series circuit parallel connection of the first switch series circuit of first five level output frequency converter unit and first five level output frequency converter unit are the power output end Vout1 that first five level is exported frequency converter unit; The structure of second five level output frequency converter unit (the five level output frequency converter unit below namely among the figure) is: by the 9th controllable switch S 9, the tenth controllable switch S 10, the 11 controllable switch S 11, the 12 controllable switch S 12, the 13 controllable switch S 13, the 14 controllable switch S 14, the 15 controllable switch S 15, the 16 controllable switch S 16, the 5th diode D5, the 6th diode D6, the 7th diode D7 and the 8th diode D8 consist of, wherein, the 9th controllable switch S 9, the 11 controllable switch S 11, the 13 controllable switch S 13 and 15 series connection of the 15 controllable switch S are the first switch series circuit of second five level output frequency converter unit, the tenth controllable switch S 10, the 12 controllable switch S 12, the 14 controllable switch S 14 and 16 series connection of the 16 controllable switch S are the second switch series circuit of second five level output frequency converter unit, it is the first diode series circuit of second five level output frequency converter unit that the both positive and negative polarity of the 5th diode D5 and the 6th diode D6 is connected from beginning to end, it is the second diode series circuit of second five level output frequency converter unit that the both positive and negative polarity of the 7th diode D7 and the 8th diode D8 is connected from beginning to end, the two ends of the first diode series circuit of second five level output frequency converter unit are connected with two nodes of the Centroid both sides of the first switch series circuit of second five level output frequency converter unit respectively, the two ends of the second diode series circuit of second five level output frequency converter unit are connected with two nodes of the Centroid both sides of the second switch series circuit of second five level output frequency converter unit respectively, and the two ends after the second switch series circuit parallel connection of the first switch series circuit of second five level output frequency converter unit and second five level output frequency converter unit are the power output end Vout2 that second five level exported frequency converter unit.
Separate between the power output end Vout2 of the power output end Vout1 of first five level output frequency converter unit and second five level output frequency converter unit; Syndeton between first five level output frequency converter unit and second the five level output frequency converter unit is: the Centroid of the first switch series circuit of first five level output frequency converter unit is connected with the Centroid that second five level exported the second switch series circuit of frequency converter unit; The Centroid of the first switch series circuit of the Centroid of the second switch series circuit of first five level output frequency converter unit and second five level output frequency converter unit is respectively the two ends of the power input Vin of described cascade 5 level output diode clamp bridge-type frequency converter.
As shown in Figure 1, gate-controlled switch comprises a triode and a diode, the emitter of triode is connected with the positive pole of diode, the collector electrode of triode is connected with the negative pole of diode, the emission of triode is the first end of gate-controlled switch very, the current collection of triode is the second end of gate-controlled switch very, and the base stage of triode is the control input end of gate-controlled switch.The structure of above-mentioned gate-controlled switch is conventional structure, so the symbol of mark triode and diode in the drawings not.
By the control to the base signal of each gate-controlled switch, realize the open and close state of each gate-controlled switch, thereby the output varying level is combined as the power supply of different frequency again by these level.Any time, the out-put supply Vout of each five level output frequency converter unit is+2E ,+E ,-E ,-one of 2E and zero level, so be called the output of five level.Whole cascade 5 level output diode clamp bridge-type frequency converter comprises a plurality of five level output frequency converter units, can carry out the series and parallel combination, thereby realizes the more power supply output of multivoltage and frequency.
Claims (2)
1. cascade 5 level output diode clamp bridge-type frequency converter, it is characterized in that: comprise the five level output frequency converter unit that a plurality of structures are identical, the structure of each described five level output frequency converter unit is: be made of eight identical gate-controlled switch and four diodes of structure, wherein four described gate-controlled switch series connection are the first switch series circuit, other four described gate-controlled switch series connection are the second switch series circuit, it is the first diode series circuit that the both positive and negative polarity of two described diodes is connected from beginning to end, it is the second diode series circuit that the both positive and negative polarity of two other described diode is connected from beginning to end, the two ends of described the first diode series circuit are connected with two nodes of the Centroid both sides of described the first switch series circuit respectively, the two ends of described the second diode series circuit are connected with two nodes of the Centroid both sides of described second switch series circuit respectively, two ends after described the first switch series circuit and the parallel connection of described second switch series circuit are the power output end that corresponding described five level are exported frequency converter unit, and the power output end of each described five level output frequency converter unit is separate; Syndeton between the adjacent described five level output frequency converter unit is: the Centroid of the first switch series circuit of previous described five level output frequency converter unit is connected with the Centroid of the second switch series circuit of rear described five a level output frequency converter unit; The Centroid of the first switch series circuit of the Centroid of the second switch series circuit of first described five level output frequency converter unit and last described five level output frequency converter unit is respectively the two ends of the power input of described cascade 5 level output diode clamp bridge-type frequency converter.
2. cascade 5 level output diode clamp bridge-type frequency converter according to claim 1, it is characterized in that: described gate-controlled switch comprises a triode and a diode, the emitter of described triode is connected with the positive pole of described diode, the collector electrode of described triode is connected with the negative pole of described diode, the first end of the very described gate-controlled switch of the emission of described triode, the second end of the very described gate-controlled switch of the current collection of described triode, the base stage of described triode are the control input end of described gate-controlled switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483699 CN202872683U (en) | 2012-09-21 | 2012-09-21 | Cascade five-level output diode clamped bridge type frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220483699 CN202872683U (en) | 2012-09-21 | 2012-09-21 | Cascade five-level output diode clamped bridge type frequency converter |
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| CN202872683U true CN202872683U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220483699 Expired - Fee Related CN202872683U (en) | 2012-09-21 | 2012-09-21 | Cascade five-level output diode clamped bridge type frequency converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684016A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Cascaded five-level output diode clamping bridge type frequency converter |
| CN107565841A (en) * | 2017-01-17 | 2018-01-09 | 湖南大学 | A kind of clamper cascade frequency multiplication multi-level power converter and its control method |
-
2012
- 2012-09-21 CN CN 201220483699 patent/CN202872683U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684016A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Cascaded five-level output diode clamping bridge type frequency converter |
| CN107565841A (en) * | 2017-01-17 | 2018-01-09 | 湖南大学 | A kind of clamper cascade frequency multiplication multi-level power converter and its control method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20130921 |