CN202435257U - Protection bypass of power unit of high-voltage transducer - Google Patents
Protection bypass of power unit of high-voltage transducer Download PDFInfo
- Publication number
- CN202435257U CN202435257U CN2012200240590U CN201220024059U CN202435257U CN 202435257 U CN202435257 U CN 202435257U CN 2012200240590 U CN2012200240590 U CN 2012200240590U CN 201220024059 U CN201220024059 U CN 201220024059U CN 202435257 U CN202435257 U CN 202435257U
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- Prior art keywords
- rectifier diode
- igbt
- inverter bridge
- protection bypass
- power cell
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Abstract
The utility model discloses a protection bypass of a power unit of a high-voltage transducer. The power unit comprises a three-phase rectifier bridge, a filtering capacitor and an inverter bridge. The protection bypass comprises commutation diodes from seventh to tenth and a thyristor. A branch formed by series connection in the same direction of the seventh and the eighth commutation diodes and a branch formed by series connection in the same direction of the ninth and the tenth commutation diodes are in parallel connection with the thyristor. An end of connection between the seventh and the eighth commutation diodes is connected with one output end of the inverter bridge. An end of connection between the ninth and the tenth commutation diodes is connected with the other output end of the inverter bridge. An anode of the thyristor is connected with cathodes of the seventh and the ninth commutation diodes. A cathode of the thyristor is connected with anodes of the eighth and the tenth commutation diodes. The protection bypass is capable of bypassing the power unit automatically when the power unit fails so that the transducer can keep running without shutting down.
Description
Technical field
The utility model relates to a kind of protection bypass that is used for the power cell of high voltage converter.
Background technology
Frequency converter is to utilize the on-off action of power semiconductor device power frequency supply to be transformed to the electric energy control device of another frequency.Along with the fast development of modern power electronics technology and microelectric technique, the high-power RHVC is constantly grown up, and originally is difficult to the high-voltage problem that solves always, has obtained good solution through device series connection or units in series in recent years.The field of its application and scope also more and more are big, and this makes efficient, utilize the energy reasonablely (especially electric energy) become possibility.The high-power RHVC is widely used in large ore spring and uses the various blower fans of industries such as factory, petrochemical industry, municipal water supply, iron and steel metallurgy, electric power energy, water pump, compressor, rolling mill etc.
At present, igbt (IGBT) obtains widespread usage in frequency converter.Yet in the process of using, occur the situation that one or several IGBT breaks down sometimes, cause the fault of power cell in the frequency converter this moment easily, tends to the result who causes system out of service.In order to make high voltage converter can also continue operate as normal, do not influence the operation of whole system, be as early as possible with the power cell of fault withdraw from and can be under non-stop-machine situation on-line replacing, how to realize this purpose, be insider's problem demanding prompt solution.
Summary of the invention
The purpose of the utility model is to overcome the defective of prior art and a kind of protection bypass that is used for the power cell of high voltage converter is provided; Under the situation that power cell breaks down automatically with its bypass; The output voltage of guaranteed output unit is 0; System can continue operation and needn't shut down, thereby has improved the reliability of system greatly.
The technical scheme that realizes above-mentioned purpose is:
A kind of protection bypass that is used for the power cell of high voltage converter; Said power cell comprises three-phase commutation bridge, be connected on filter capacitor and the inverter bridge that connects these filter capacitor two ends of two outputs of this three-phase commutation bridge; Said protection bypass is connected between two outputs of said inverter bridge; And this protection bypass comprises the 7th to the tenth rectifier diode and a controllable silicon, wherein:
Branch road and said controllable silicon that the branch road that the 7th rectifier diode and the 8th rectifier diode series aiding connection form, the 9th rectifier diode and the tenth rectifier diode series aiding connection form are parallel with one another; The end that joins of the 7th rectifier diode and the 8th rectifier diode is connected an output of said inverter bridge, and the end that joins of the 9th rectifier diode and the tenth rectifier diode is connected another output of said inverter bridge;
Said silicon controlled anode connects the negative pole of the 7th rectifier diode and the negative pole of the 9th rectifier diode; Said silicon controlled negative electrode connects the positive pole of the 8th rectifier diode and the positive pole of the tenth rectifier diode.
In the protection bypass of the above-mentioned power cell that is used for high voltage converter, said inverter bridge comprises that first to fourth IGBT, first absorbs electric capacity and second and absorbs electric capacity, wherein:
The branch road and second that the branch road, first that the one IGBT and the 2nd IGBT series connection form absorbs electric capacity, the 3rd IGBT and the 4th IGBT series connection formation absorbs electric capacity parallel connection successively; The output as said inverter bridge is held in joining of the one IGBT and the 2nd IGBT, end another output as said inverter bridge that joins of the 3rd IGBT and the 4th IGBT.
In the protection bypass of the above-mentioned power cell that is used for high voltage converter, the said silicon controlled control utmost point connects said inverter bridge.
In the protection bypass of the above-mentioned power cell that is used for high voltage converter, said three-phase commutation bridge inserts the electrical network three-phase voltage.
The beneficial effect of the utility model is: the utility model can be automatically with its bypass under the situation that power cell breaks down; The output voltage that guarantees this power cell is 0; Can overvoltage do not cause quick-friedly falling, and can readjust the output waveform of remaining power cell, realize not cutting off the power supply, microvariations continue operation; Thereby the system that makes can continue operation and needn't shut down, thereby has improved the reliability of system greatly.
Description of drawings
Fig. 1 is the structural representation that the power cell of the utility model mesohigh frequency converter connects the protection bypass.
Embodiment
To combine accompanying drawing that the utility model is described further below.
See also Fig. 1, the power cell of high voltage converter comprises: three-phase commutation bridge 11, be connected on filter capacitor C and the inverter bridge 12 that connects the two ends of filter capacitor C of two outputs of three-phase commutation bridge 11, wherein:
Three-phase commutation bridge 11 is by inserting electrical network three-phase voltage R, S, T; And by 6 diodes; Promptly first to the 6th rectifier diode D1-D6 forms; The interchange of input is carried out forming Rectified alternating current after the rectification, between positive and negative bus, form direct voltage, supply with inverter bridge 12 thereby carry out filtering by filter capacitor C then;
The branch road and second that the branch road, first that the one IGBT Q1 and the 2nd IGBT Q2 series connection form absorbs capacitor C 1, the 3rd IGBT Q3 and the 4th IGBT Q4 series connection formation absorbs capacitor C 2 parallel connection successively; The output L1 as inverter bridge 12 is held in joining of the one IGBT Q1 and the 2nd IGBT Q2, another output L2 of end as inverter bridge 12 that join of the 3rd IGBT Q3 and the 4th IGBT Q4.
The protection bypass 2 of the power cell that is used for high voltage converter of the utility model is connected between the two output L1, L2 of inverter bridge 12, and this protection bypass 2 comprises the 7th to the tenth a rectifier diode D7-D10 and a controllable silicon 21, wherein:
Branch road and controllable silicon 21 that the branch road that the 7th rectifier diode D7 and the 8th rectifier diode D8 series aiding connection form, the 9th rectifier diode D9 and the tenth rectifier diode D10 series aiding connection form are parallel with one another; The end that joins of the 7th rectifier diode D7 and the 8th rectifier diode D8 is connected an output L1 of inverter bridge 12, and the end that joins of the 9th rectifier diode D9 and the tenth rectifier diode D10 is connected another output L2 of inverter bridge 12;
The anode of controllable silicon 21 connects the negative pole of the 7th rectifier diode D7 and the negative pole of the 9th rectifier diode D9; The negative electrode of controllable silicon 21 connects the positive pole of the 8th rectifier diode D8 and the positive pole of the tenth rectifier diode D10; The control utmost point of controllable silicon 21 connects inverter bridge 12.
The utility model principle: the protection bypass 2 of the utility model is applied to several power cells, and each power cell joins as shown in Figure 1 with it.When fault such as certain power cell opens circuit at input side dead electricity (like fuse disconnected etc.), IGBT short circuit, IGBT, control board catastrophe failure (comprising that Cell processor quits work), the continuous Communications failure of main control unit following time; Then bypass the power cell of this fault, promptly inverter bridge 12 is turn-offed by system, triggers controllable silicon 21; Guarantee that electric current can pass through; Still form path, continue operation, increase substantially the reliability of whole frequency converter thereby realize not cutting off the power supply.
Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model; The technical staff in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to the category of the utility model, should be limited each claim.
Claims (4)
1. protection bypass that is used for the power cell of high voltage converter; Said power cell comprises three-phase commutation bridge, be connected on filter capacitor and the inverter bridge that connects these filter capacitor two ends of two outputs of this three-phase commutation bridge; It is characterized in that; Said protection bypass is connected between two outputs of said inverter bridge, and this protection bypass comprises the 7th to the tenth rectifier diode and a controllable silicon, wherein:
Branch road and said controllable silicon that the branch road that the 7th rectifier diode and the 8th rectifier diode series aiding connection form, the 9th rectifier diode and the tenth rectifier diode series aiding connection form are parallel with one another; The end that joins of the 7th rectifier diode and the 8th rectifier diode is connected an output of said inverter bridge, and the end that joins of the 9th rectifier diode and the tenth rectifier diode is connected another output of said inverter bridge;
Said silicon controlled anode connects the negative pole of the 7th rectifier diode and the negative pole of the 9th rectifier diode; Said silicon controlled negative electrode connects the positive pole of the 8th rectifier diode and the positive pole of the tenth rectifier diode.
2. the protection bypass that is used for the power cell of high voltage converter according to claim 1 is characterized in that, said inverter bridge comprises that first to fourth IGBT, first absorbs electric capacity and second and absorbs electric capacity, wherein:
The branch road and second that the branch road, first that the one IGBT and the 2nd IGBT series connection form absorbs electric capacity, the 3rd IGBT and the 4th IGBT series connection formation absorbs electric capacity parallel connection successively; The output as said inverter bridge is held in joining of the one IGBT and the 2nd IGBT, end another output as said inverter bridge that joins of the 3rd IGBT and the 4th IGBT.
3. the protection bypass that is used for the power cell of high voltage converter according to claim 2 is characterized in that, the said silicon controlled control utmost point connects said inverter bridge.
4. the protection bypass that is used for the power cell of high voltage converter according to claim 1 is characterized in that, said three-phase commutation bridge inserts the electrical network three-phase voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200240590U CN202435257U (en) | 2012-01-19 | 2012-01-19 | Protection bypass of power unit of high-voltage transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200240590U CN202435257U (en) | 2012-01-19 | 2012-01-19 | Protection bypass of power unit of high-voltage transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202435257U true CN202435257U (en) | 2012-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200240590U Expired - Lifetime CN202435257U (en) | 2012-01-19 | 2012-01-19 | Protection bypass of power unit of high-voltage transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202435257U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701335A (en) * | 2013-12-31 | 2014-04-02 | 天安电气集团浙江电气有限公司 | High-voltage inverter power unit system |
| CN105406457A (en) * | 2015-12-23 | 2016-03-16 | 辽宁荣信电气传动技术有限责任公司 | Two-circuit power supply high-voltage frequency converter unit bypass device based on thyristor |
-
2012
- 2012-01-19 CN CN2012200240590U patent/CN202435257U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701335A (en) * | 2013-12-31 | 2014-04-02 | 天安电气集团浙江电气有限公司 | High-voltage inverter power unit system |
| CN105406457A (en) * | 2015-12-23 | 2016-03-16 | 辽宁荣信电气传动技术有限责任公司 | Two-circuit power supply high-voltage frequency converter unit bypass device based on thyristor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |