CN2894074Y - Five level converter structural apparatus - Google Patents
Five level converter structural apparatus Download PDFInfo
- Publication number
- CN2894074Y CN2894074Y CN 200620083113 CN200620083113U CN2894074Y CN 2894074 Y CN2894074 Y CN 2894074Y CN 200620083113 CN200620083113 CN 200620083113 CN 200620083113 U CN200620083113 U CN 200620083113U CN 2894074 Y CN2894074 Y CN 2894074Y
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- CN
- China
- Prior art keywords
- circuit
- brachium pontis
- level converter
- level
- structure device
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- Expired - Fee Related
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Abstract
The utility model relates to a structural device of a five-level converter and belongs to the electronic converter technology field. The five-level converter is formed by adding to a three-level main circuit an assisted bridge arm which is parallel between a snubber capacity and the bridge arm of the three-level main circuit and is made up of a plurality of series tandem power devices paralleled with a plurality of embedded diodes.The utility of the structural device of the five-level converter reduces the component number and the cost, and strengthens the stability of the circuit.
Description
(1) technical field under
The utility model relates to a kind of five-level converter structure device, belongs to the technical field of electronic converter.
(2) background technology
In five traditional level circuit structures, for three-phase system, if adopt electronic switch, then electronic switch is more, it needs 24 at least, each needs 8 mutually, and the electric capacity number is also bigger simultaneously, generally needs four at least, make that switching device quantity is many, the fault point height, to big volume change the time, shortcoming such as harmonic problem is outstanding under the low switching frequency.
(3) summary of the invention
The utility model provides the five-level converter structure device that a kind of components and parts are few, control is simple, failure rate is low in order to overcome the deficiency of above technology.
The utility model is realized by following measure:
Five-level converter structure device of the present utility model, be to change at three level main transformers to increase an auxiliary brachium pontis on the circuit, auxiliary brachium pontis is connected in parallel between the brachium pontis that absorbs electric capacity and three level translation main circuits, and described auxiliary brachium pontis is made up of several power device series connection back several catching diodes in parallel.
Five-level converter structure device of the present utility model is connected with 1 between the main converter central point: the transformer of K is coupled between the mid point of transformer and main converter, to reach the effect of eliminating particular harmonic.
Five-level converter structure device of the present utility model, the operating frequency of described auxiliary brachium pontis are 3 times that main transformer changes fundamental frequency in the circuit.
Five-level converter structure device of the present utility model, its circuit structure can be single bridge arm circuit of the auxiliary brachium pontis of band; Or the doube bridge arm circuit of the auxiliary brachium pontis of band; Or many bridge arm circuit of the auxiliary brachium pontis of band.
In the five-level converter structure device of the present utility model, reduce component number, reduced cost, strengthened the stability of circuit.
(4) description of drawings
Accompanying drawing is the doube bridge arm circuit diagram of the auxiliary brachium pontis of band of the present invention.Among the figure: 1-power model 2-assists brachium pontis 3-transformer 4-brachium pontis
(5) embodiment
Below in conjunction with the drawings and specific embodiments the present invention is made specific description.
Accompanying drawing is the doube bridge arm circuit diagram of the auxiliary brachium pontis of band of the present invention.
Auxiliary brachium pontis 2 is made up of four power device ug1, ug2, ug3, ug4 and two diode D1 and D2.But the power model 1 of this accompanying drawing can be the device of multiple rate of doing work switch, here be example with power model IGBT, sort circuit is present between the positive and negative busbar behind the direct current, 4 power device ug1, ug2, ug3, drain electrode and the source electrode of ug4 are connected mutually, the power device ug1 of series connection and 1 a between the power device ug2, the power device ug3 of series connection and 1 b point between the power device ug4, at a, between the b in parallel one by diode D1 and the positive and negative clamped circuit that is composed in series of D2, the negative pole of diode D1 connects a point, the positive pole of diode D2 connects the b point, two capacitor C 1 of series connection mutually in parallel between the positive and negative busbar of direct current Vdc, the absorption filter circuit that C2 forms.
Equally the circuit of being made up of the power device of four series connection and two diode in series is called a brachium pontis 4, and such brachium pontis 4 has two, all is connected in parallel in the middle of the positive and negative busbar after direct current absorbs capacitor C 1 and C2, and brachium pontis 4 is positioned at the back of assisting brachium pontis 2.
Also has a transformer 3 in the middle of the circuit, the two elementary absorption capacitor C 1 that are connected two series connection of transformer 3, the centre of C2, A point in the middle of the power model of one termination ug2 of 3 levels of transformer and ug3 series connection, another time utmost point of transformer T connects B point and the catching diode D5 of second brachium pontis and the D point of the clamped circuit that D6 forms of the catching diode of first brachium pontis D3 and D4 composition, mid point C at first brachium pontis and second brachium pontis, the E point is respectively drawn a phase output terminal U and a V, on three-level converter, increase an auxiliary brachium pontis 2, its operating frequency is that 3 times main transformer changes the fundamental frequency in the circuit, between the central point of AC-AC converter with 1: the transformer T of K is coupled, and reaches harmonic carcellation.Produce in the work: Vdc/2, KVdc/2,0 ,-five kinds of level of KVdc/2, Vdc/2.
Sort circuit has reduced components and parts, has reduced cost, has strengthened the stability of circuit.
Claims (6)
1. five-level converter structure device, it is characterized in that: be to change at three level main transformers to increase an auxiliary brachium pontis (2) on the circuit, auxiliary brachium pontis (2) is connected in parallel on absorption electric capacity and three level main transformers change between the brachium pontis (4) of circuit, and described auxiliary brachium pontis (2) is made up of several power devices series connection back several catching diodes in parallel.
2. five-level converter structure device according to claim 1 is characterized in that: be connected with 1 between the main converter central point: the transformer of K is coupled between the mid point of transformer and main converter.
3. five-level converter structure device according to claim 1 and 2 is characterized in that: the operating frequency of described auxiliary brachium pontis (2) is 3 times that main transformer changes fundamental frequency in the circuit.
4. five-level converter structure device according to claim 1 and 2 is characterized in that: its circuit structure is single bridge arm circuit.
5. five-level converter structure device according to claim 1 and 2 is characterized in that: its circuit structure is a doube bridge arm circuit.
6. five-level converter structure device according to claim 1 and 2 is characterized in that: its circuit structure is many bridge arm circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620083113 CN2894074Y (en) | 2006-04-17 | 2006-04-17 | Five level converter structural apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620083113 CN2894074Y (en) | 2006-04-17 | 2006-04-17 | Five level converter structural apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2894074Y true CN2894074Y (en) | 2007-04-25 |
Family
ID=38062223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620083113 Expired - Fee Related CN2894074Y (en) | 2006-04-17 | 2006-04-17 | Five level converter structural apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2894074Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100466448C (en) * | 2006-04-17 | 2009-03-04 | 山东新风光电子科技发展有限公司 | Five-level converter structure device |
| CN101917133A (en) * | 2010-08-30 | 2010-12-15 | 南京航空航天大学 | Five-electrical level inverter |
| CN102035420A (en) * | 2009-09-25 | 2011-04-27 | 富士电机控股株式会社 | Five-level converter |
-
2006
- 2006-04-17 CN CN 200620083113 patent/CN2894074Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100466448C (en) * | 2006-04-17 | 2009-03-04 | 山东新风光电子科技发展有限公司 | Five-level converter structure device |
| CN102035420A (en) * | 2009-09-25 | 2011-04-27 | 富士电机控股株式会社 | Five-level converter |
| CN102035420B (en) * | 2009-09-25 | 2013-10-16 | 富士电机株式会社 | Five-level converter |
| CN101917133A (en) * | 2010-08-30 | 2010-12-15 | 南京航空航天大学 | Five-electrical level inverter |
| CN101917133B (en) * | 2010-08-30 | 2012-08-22 | 南京航空航天大学 | Five-electrical level inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20070425 Termination date: 20100417 |