CN102315766A - Three-phase high-voltage transducer - Google Patents
Three-phase high-voltage transducer Download PDFInfo
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- CN102315766A CN102315766A CN201010523080A CN201010523080A CN102315766A CN 102315766 A CN102315766 A CN 102315766A CN 201010523080 A CN201010523080 A CN 201010523080A CN 201010523080 A CN201010523080 A CN 201010523080A CN 102315766 A CN102315766 A CN 102315766A
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- phase inversion
- inversion unit
- phase
- output
- rack
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Abstract
The invention discloses a three-phase high-voltage transducer, which comprises three single-phase inversion unit groups, wherein each single-phase inversion unit group comprises a plurality of single-phase inversion units which are connected in series; each single-phase inversion unit comprises a CPLD (Complex Programmable Logic Device) logic unit, an anode output joint and a cathode output joint; the single-phase inversion units in the same group are divided into two rows in the same layer, and the two rows of single-phase inversion units are arranged back to back; the single-phase inversion unit also comprises a control switch which is used for switching the polarities of the anode output joint and the cathode output joint and changing the output phase position of the CPLD logic unit; and by means of the control switch, the arrangement direction of output polarities of the anode output joints and the cathode output joints of the rear row are same as the arrangement direction of the output polarities of the anode output joints and the cathode output joints of the single-phase inversion units of the front row. According to the invention, the length of a cabinet can be shortened, and the electromagnetic interference caused by a circuitous, repeated and crossed wiring way in the prior art can be prevented; meanwhile, modularized design can be realized, and convenience can be brought for transportation, installation and maintenance.
Description
[technical field]
The present invention relates to converter technique, relate in particular to a kind of three-phase high-voltage frequency converter.
[background technology]
Frequency converter is used for the electric actuator of frequency conversion and speed regulation of AC motor; Be widely used in the national economy industry-by-industry; Along with technological progress and industry development; The use of large-scale, super-huge motor more and more widely, and is also increasing with three market demands high-power, high voltage converter that adapt, because high-voltage high-power motor very crucial often equipment in system applies; Its reliability of operation is extremely important, and therefore the reliability to its supporting high voltage converter has also proposed very high requirement.
As shown in figures 1 and 3; Existing high voltage converter adopts the topological structure of low pressure inversion unit (power cell) series connection mostly; Be characterized in: at input side configuration phase shifting transformer, be low pressure with high pressure converted, each secondary winding of phase shifting transformer all has the single-phase inversion output unit of one group of low pressure three-phase input; Several low pressure single-phase inversion units in series can form a phase high pressure, and the low pressure single-phase inversion unit of three " string " out of phase connects can form three-phase high-voltage.In general, 6KV high voltage converter is every to be made up of 6 low pressure single-phase inversion units in series, and then the three-phase high-voltage frequency converter just has 18 low pressure single-phase inversion unit; 10KV high voltage converter is every to be made up of 9 low pressure single-phase inversion units in series, and then the three-phase high-voltage frequency converter has 27 low pressure single-phase inversion unit.
The polarity of conventional high-tension transducer power unit is fixed, and the annexation and the combination of this each power cell of decision will be single.When high voltage converter design output changes, causes the power cell number to increase; As pressing the conventional arrangements mode; The power cell of each phase all is arranged in installs the side of cabinet with one deck; Not only make the distance of phase shifting transformer power cell excessive, and the length of high voltage converter is also long to the rear end; Being divided into two row like the power cell with each phase arranges back-to-back; Because of the fixing polarity of high voltage transducer power unit; The arranged direction of back row's power cell positive and negative electrode out splice going splice is opposite with the arranged direction of front-seat power cell positive and negative electrode out splice going splice, and one row power cell complicated outside mutual line in the back side can bring the electromagnetic interference that can't overcome to entire equipment.
[summary of the invention]
The technical problem that the present invention will solve provide a kind of when the power cell number more for a long time; The distance of phase shifting transformer power cell to the rear end is unlikely to excessive; And the length of high voltage converter rack is unlikely to long, and the power cell aerial lug can not produce the three-phase high-voltage frequency converter of excessive electromagnetic interference.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is that a kind of three-phase high-voltage frequency converter comprises rack, blower fan and 3 single-phase inversion unit groups, comprises the air channel in the described rack; Each single-phase inversion unit group comprises the single-phase inversion unit of a plurality of serial connections; Same group single-phase inversion arrangements of cells is at same one deck of rack; Described single-phase inversion unit comprises CPLD logical block, anodal out splice going splice, negative pole out splice going splice; Same group single-phase inversion unit is divided into two rows in same one deck of rack, two row's single-phase inversion unit are arranged back-to-back; Described single-phase inversion unit comprises the control switch of conversion positive and negative electrode out splice going splice output polarity, and described control switch changes the output phase of CPLD logical block; Make the orientation of the output polarity of afterwards arranging single-phase inversion unit positive and negative electrode out splice going splice identical through control switch with the orientation of the output polarity of front-seat single-phase inversion unit positive and negative electrode out splice going splice.
Described control switch is a toggle switch.
Toggle switch comprises 2 inputs and 1 output, and 2 inputs of toggle switch connect the positive logic output terminal and the negative logic output terminal of CPLD logical block respectively, the input of the next stage signal processing circuit of the output termination CPLD logical block of toggle switch.
Described single-phase inversion unit comprises air channel import and export separately, and the front and back of said rack comprises air inlet, and described air channel is between two row's single-phase inversion unit, and described blower fan is arranged in the top of rack.
The present invention not only can dwindle the length of rack, can also after dwindling the length of rack, prevent the make a circulation caused electromagnetic interference of wire laying mode of repetition, intersection of prior art wiring; Simultaneously the single-phase inversion unit can design by modularization, bring convenience for transportation, installation, maintenance.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is the schematic diagram of the power cell reversing of the embodiment of the invention 1.
Fig. 2 is the A schematic perspective view that mutually each power cell is placed in the layer cabinet of high voltage converter embodiment of the present invention.
Fig. 3 is the A floor map that mutually each power cell is placed in the layer cabinet of high voltage converter embodiment of the present invention.
Fig. 4 is the air channel sketch map of the A phase layer cabinet of three-phase high-voltage frequency converter embodiment of the present invention.
Fig. 5 is the air channel sketch map of the rack of three-phase high-voltage frequency converter embodiment of the present invention.
Fig. 6 is the outline drawing of three-phase high-voltage frequency converter embodiment rack of the present invention.
[embodiment]
In the embodiment of Fig. 1 high voltage converter of the present invention extremely shown in Figure 6; The three-phase high-voltage frequency converter comprises A, B, a C3 single-phase inversion unit group; Each single-phase inversion unit group is made up of the single-phase inversion unit of most serial connections, and same group single-phase inversion arrangements of cells is at same one deck of rack.Each single-phase inversion unit comprises 1 anodal out splice going splice L2 and negative pole out splice going splice L1; In order to shorten the length of high voltage converter, the single-phase inversion unit in same group is divided into two rows in same one deck of rack, and two row's single-phase inversion unit arrange that back-to-back as shown in Figure 2, the single-phase inversion arrangements of cells of i to n is at the rear side with layer cupboard.
Toggle switch as conversion positive and negative electrode out splice going splice output polarity control switch is arranged in the single-phase inversion unit.Toggle switch is installed in corresponding indicator light place, each unit (unit is inner), puts in the unit and can toggle switch be toggled it to the relevant position with screwdriver.Be contained in back row's single-phase inversion unit, its toggle switch is stirred and is made indicator light " bright ", and the output polarity conversion of single-phase inversion unit is contained in the preceding single-phase inversion unit of cabinet, and its toggle switch is stirred indicator light " is gone out ", and the polarity of unit is constant; The electric output polarity of single-phase inversion unit out splice going splice L1, L2 that is i to n is just in time opposite with the electric output polarity of front-seat just in time L1, L2, but the orientation of the output polarity of forward and backward row's single-phase inversion unit positive and negative electrode out splice going splice is identical.
Can change single-phase inversion unit positive and negative electrode out splice going splice output polarity through toggle switch.Toggle switch comprises 2 input B and C and 1 output D; 2 input B of toggle switch and C connect positive logic output terminal and the negative logic output terminal of CPLD logical block (complex programmable logic device) respectively; The output D of toggle switch connects the input of the next stage signal processing circuit of CPLD logical block; Because the output of the next stage signal processing circuit of CPLD logical block is the signal coupling amplifying circuit that connects single-phase inversion unit IGBT drive circuit; Can change the polarity that the CPLD cellular logic is exported digital waveform through toggle switch, reach the change of single-phase inversion unit output polarity at last.The computing of present embodiment CPLD logical block realizes that output waveform is constant, but output polarity changes, and reaches the effect that single-phase inversion unit output polarity changes at last.
Output polarity through conversion single-phase inversion unit; The anodal out splice going splice L2 of row's single-phase inversion unit, back becomes negative pole output; Negative pole out splice going splice L1 becomes anodal output, and the orientation of the output polarity of row's single-phase inversion unit positive and negative electrode out splice going splice is identical with the orientation of the output polarity of front-seat single-phase inversion unit positive and negative electrode out splice going splice after making.Like this; As shown in Figures 2 and 3; The bus connection method of front-seat single-phase inversion unit all is being linked in sequence by traditional L1-L2; Back row's single-phase inversion unit is changed because of output polarity, and the order of pressing L2-L1 links to each other, and arranges the out splice going splice L2 (the negative pole out splice going splice after the conversion) of the 1st single-phase inversion unit after the both positive and negative polarity out splice going splice of front-seat last 1 single-phase inversion unit connects.
Present embodiment not only can dwindle the length of rack, can also after dwindling the length of rack, prevent the make a circulation caused electromagnetic interference of wire laying mode of repetition, intersection of prior art wiring; Simultaneously the single-phase inversion unit can design by modularization, bring convenience for transportation, installation, maintenance.
Each single-phase inversion unit all has air channel separately to import and export; All there is air inlet the front and back of rack, and screen pack is arranged on the air inlet, and the air channel import on the power cell is facing to the air inlet of rack; The rack main air duct is between two row's single-phase inversion unit; Ducting outlet on the power cell is facing to the main air duct of rack, and blower fan is arranged in the top of main air duct, the top of rack.This structure can realize the heat radiation good to each single-phase inversion unit.
More than high voltage converter of the present invention has been carried out detailed introduction, used concrete example among this paper principle of the present invention and execution mode set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all may change, the content of this specification embodiment should not be construed as limitation of the present invention.
Claims (4)
1. a three-phase high-voltage frequency converter comprises rack, blower fan and 3 single-phase inversion unit groups, comprises the air channel in the described rack; Each single-phase inversion unit group comprises the single-phase inversion unit of a plurality of serial connections; Same group single-phase inversion arrangements of cells is at same one deck of rack; Described single-phase inversion unit comprises CPLD logical block, anodal out splice going splice, negative pole out splice going splice; It is characterized in that same group single-phase inversion unit is divided into two rows in same one deck of rack, two row's single-phase inversion unit are arranged back-to-back; Described single-phase inversion unit comprises the control switch of conversion positive and negative electrode out splice going splice output polarity, and described control switch changes the output phase of CPLD logical block; Make the orientation of the output polarity of afterwards arranging single-phase inversion unit positive and negative electrode out splice going splice identical through control switch with the orientation of the output polarity of front-seat single-phase inversion unit positive and negative electrode out splice going splice.
2. three-phase high-voltage frequency converter according to claim 1 is characterized in that described control switch is a toggle switch.
3. three-phase high-voltage frequency converter according to claim 2; It is characterized in that; Toggle switch comprises 2 inputs and 1 output; 2 inputs of toggle switch connect the positive logic output terminal and the negative logic output terminal of CPLD logical block respectively, the input of the next stage signal processing circuit of the output termination CPLD logical block of toggle switch.
4. three-phase high-voltage frequency converter according to claim 1; It is characterized in that; Described single-phase inversion unit comprises air channel import and export separately; The front and back of said rack comprises air inlet, and described air channel is between two row's single-phase inversion unit, and described blower fan is arranged in the top of rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010523080A CN102315766A (en) | 2010-10-28 | 2010-10-28 | Three-phase high-voltage transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010523080A CN102315766A (en) | 2010-10-28 | 2010-10-28 | Three-phase high-voltage transducer |
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| Publication Number | Publication Date |
|---|---|
| CN102315766A true CN102315766A (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010523080A Pending CN102315766A (en) | 2010-10-28 | 2010-10-28 | Three-phase high-voltage transducer |
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| CN (1) | CN102315766A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035711A (en) * | 1974-07-26 | 1977-07-12 | Hans Piller | Rotary frequency-changer |
| CN2919623Y (en) * | 2006-07-13 | 2007-07-04 | 北京中益合康电气技术有限公司 | Cell cabinet of high-voltage transducer |
-
2010
- 2010-10-28 CN CN201010523080A patent/CN102315766A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4035711A (en) * | 1974-07-26 | 1977-07-12 | Hans Piller | Rotary frequency-changer |
| CN2919623Y (en) * | 2006-07-13 | 2007-07-04 | 北京中益合康电气技术有限公司 | Cell cabinet of high-voltage transducer |
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Effective date of abandoning: 20120111 |
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