CN104467452A - Parallel module type frequency converter - Google Patents
Parallel module type frequency converter Download PDFInfo
- Publication number
- CN104467452A CN104467452A CN201410746912.3A CN201410746912A CN104467452A CN 104467452 A CN104467452 A CN 104467452A CN 201410746912 A CN201410746912 A CN 201410746912A CN 104467452 A CN104467452 A CN 104467452A
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- Prior art keywords
- frequency converter
- modular frequency
- parallel
- modular
- copper bar
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention relates to the technical field of frequency converters, in particular to a parallel module type frequency converter. The parallel module type frequency converter comprises three module type frequency converter bodies, three-phase input terminals of the module type frequency converter bodies are connected through copper bars and serve as one path of three-phase input of the parallel module type frequency converter; three-phase output terminals of the module type frequency converter bodies are connected through copper bars and serve as one path of three-phase output of the parallel module type frequency converter; the direct-current bus P ends or N ends of the module type frequency converter bodies are connected through stacked copper bars and serve as the direct-current bus P end or N end of the parallel module type frequency converter; a master control board of one of the three module type frequency converter bodies is connected with power driver boards of the module type frequency converter bodies through flat cables, and the power driver boards of the module type frequency converter bodies select driving signals through dial switches. The parallel module type frequency converter can be modularized, standardized and connected in parallel, the variety and the number of materials of frequency converter manufacturers can be greatly reduced, and meanwhile on-site maintenance and replacement performed by maintenance personnel are facilitated.
Description
Technical field
The present invention relates to converter technology field, particularly relate to a kind of Modular frequency converter in parallel.
Background technology
Frequency converter is application converter technique and power electronic technology, change machine operation frequency by modules such as rectification, filtering, inversions and reach speed governing object motor driving apparatus, the industries such as chemical industry, weaving, packaging, water treatment are widely used in now, but the design of power of motor grade pressed by frequency converter, frequency converter is once complete production, its performance index such as power, rated current just secure, can only for corresponding power section motor device, cause that frequency converter model is various, poor universality, give buying, produce, transport, install and bring inconvenience.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of Modular frequency converter in parallel, can make frequency converter modularization, standardization, can parallel connectionization.
For reaching this object, the present invention by the following technical solutions:
A kind of Modular frequency converter in parallel, comprises three Modular frequency converter, and three-phase input end of each described Modular frequency converter is connected by copper bar, as a road of Modular frequency converter three-phase input in parallel; Three-phase output end of each described Modular frequency converter is connected by copper bar, as the road that Modular frequency converter three-phase in parallel exports; The DC bus P of described three Modular frequency converter holds or N end is connected by lamination copper bar, and the DC bus P as Modular frequency converter in parallel holds or N end; The master control borad of a Modular frequency converter in described three Modular frequency converter is connected with the power drives plate of each Modular frequency converter by winding displacement, and the power drives plate of described three Modular frequency converter selects drive singal by toggle switch.
Preferably, three-phase output end of each described Modular frequency converter is connected by copper bar and is connected with a Hall element.
Preferably, described Modular frequency converter comprises cabinet, rectification module, lamination copper bar, charging resistor, electrochemical capacitor, D.C. contactor, three-phase input end, three-phase output end, inversion module, power drives plate, described three-phase input end is arranged on the top of cabinet, described three-phase output end is arranged on the bottom of cabinet, one end of described D.C. contactor, one end of charging resistor is all held with the P of DC bus and is connected, the other end of described D.C. contactor, the other end of charging resistor is all connected with electrochemical capacitor positive pole, the negative pole of described electrochemical capacitor is held with the N of DC bus and is connected, the P end of described rectification module, the P end of inversion module to be held with the P of DC bus respectively by lamination copper bar and is connected, the N end of described rectification module, the N end of inversion module to be held with the N of DC bus respectively by lamination copper bar and is connected.
Preferably, described power drives plate is welded on described inversion module, is connected with described inversion module by winding displacement.Preferably, described rectification module is by copper bar and described three-phase input end sub-connection.
Preferably, described inversion module is by copper bar and described three-phase output end sub-connection.
Preferably, described Modular frequency converter also comprises Hall element, and described Hall element is fixed on described three-phase output end.
Preferably, described Modular frequency converter also comprises radiator, and described radiator is connected with the bottom of described rectification module, inversion module, and described radiator adopts highly dense profile of tooth material to make.
Preferably, described Modular frequency converter also comprises fan, and described fan is arranged on the side near described three-phase output end in cabinet.
Preferably, described electrochemical capacitor is reverse buckling type electrochemical capacitor.
Modular frequency converter in parallel of the present invention, comprises three Modular frequency converter, and three-phase input end of each described Modular frequency converter is connected by copper bar, as a road of Modular frequency converter three-phase input in parallel; Three-phase output end of each described Modular frequency converter is connected by copper bar, as the road that Modular frequency converter three-phase in parallel exports; The DC bus P of described three Modular frequency converter holds or N end is connected by copper bar, and the DC bus P as Modular frequency converter in parallel holds or N end; The master control borad of a Modular frequency converter in described three Modular frequency converter is connected with the power drives plate of each Modular frequency converter by winding displacement copper bar, and the power drives plate of described three Modular frequency converter selects drive singal by toggle switch.Compare than prior art, each Modular frequency converter of Modular frequency converter in parallel can be used alone, also can by assembling realization is in parallel fast, simply, power output expands to three times of single module, realize the product of whole high-power section, accomplish the modularization of frequency converter, standardization, can parallel connectionization, material category and the quantity of frequency converter producer can be greatly reduced, shorten buying and production cycle, the simultaneously field service of convenient for maintaining personnel and replacing.
Accompanying drawing explanation
Fig. 1 is the structure chart of Modular frequency converter of the present invention.
Fig. 2 is the circuit diagram of Modular frequency converter of the present invention.
Fig. 3 is the structure chart of Modular frequency converter in parallel of the present invention.
In figure, 1 D.C. contactor, 2 three-phase input end, 3 rectification modules, 4 copper bars, 5 Hall elements, 6 three-phase output end, 7 charging resistors, 8 electrochemical capacitors, 9 cabinets, 10 power drives plates, 11 radiators, 12 fans.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See figure 1 ?3, be respectively the structure chart of the structure chart of the Modular frequency converter that the embodiment of the present invention provides, circuit diagram and Modular frequency converter in parallel, Modular frequency converter in parallel of the present invention, comprise three Modular frequency converter, three-phase input end 2 of each described Modular frequency converter is connected by copper bar, as a road of Modular frequency converter three-phase input in parallel; Three-phase output end 6 of each described Modular frequency converter is connected by copper bar, as the road that Modular frequency converter three-phase in parallel exports; The DC bus P of described three Modular frequency converter holds or N end is connected by lamination copper bar 4, and the DC bus P as Modular frequency converter in parallel holds or N end; The master control borad of a Modular frequency converter in described three Modular frequency converter is connected with the power drives plate 10 of each Modular frequency converter by winding displacement, and the power drives plate 10 of described three Modular frequency converter selects drive singal by toggle switch.
In embodiments of the present invention, each Modular frequency converter independently can use as an independent frequency converter, and when three Modular frequency converter parallel combinations use, power output will expand as three times of Modular frequency converter.Basic Modular frequency converter only has 3 sections, be respectively 55kw 90kw 132kw, can only the basic module of 3 equal-wattages in parallel together, time in parallel, the sub-2R/S/T of three-phase input end of Modular frequency converter, is linked together by copper bar, as a road of three-phase input, three Modular frequency converter parallel connections, respectively as a certain phase input terminal of frequency converter after parallel connection; The sub-6U/V/W of three-phase output end of Modular frequency converter, is linked together by copper bar, and as the road that three-phase exports, three Modular frequency converter parallel connections, respectively as a certain phase output terminals of frequency converter after parallel connection; The DC bus P of Modular frequency converter holds or N end, is linked together by lamination copper bar 4, and the DC bus P as frequency converter after parallel connection holds or N end; Modular frequency converter is all furnished with one piece of master control borad, when parallel combination uses, retain wherein one piece of master control borad as parallel combination frequency converter (master control borad in the middle of general selection), be connected with the power drives plate 10 of each Modular frequency converter by winding displacement; Modular frequency converter D.C. contactor 1 provides pickup signal by master control borad according to DC bus charge condition, during use in parallel, provides pickup signal, control the adhesive of D.C. contactor 1 in each Modular frequency converter simultaneously by master control borad according to busbar voltage; Three-phase output end 6 of each described Modular frequency converter is connected by copper bar and is connected with a Hall element 5.Modular frequency converter has three Hall elements 5 to be separately fixed at U/V/W three-phase output copper bar, during use in parallel, the three-phase of each module internal exports and uses copper bar to link together, and adopts a Hall element 5 as the detection (generally specifying one of them in advance) of this phase output current; The power drives plate 10 of Modular frequency converter has U/V/W tri-road drive singal, when parallel combination uses, selects to be connected in parallel by the drive singal of three-phase, as a certain road drive singal of this Modular frequency converter in parallel by toggle switch.
Modular frequency converter comprises cabinet 9, rectification module 3, lamination copper bar 4, charging resistor 7, electrochemical capacitor 8, D.C. contactor 1, three-phase input end 2, three-phase output end 6, inversion module, power drives plate 10, described three-phase input end 2 is arranged on the top of cabinet 9, described three-phase output end 6 is arranged on the bottom of cabinet 9, one end of described D.C. contactor 1, one end of charging resistor 7 is all held with the P of DC bus and is connected, the other end of described D.C. contactor 1, the other end of charging resistor 7 is all connected with electrochemical capacitor 8 positive pole, the negative pole of described electrochemical capacitor 8 is held with the N of DC bus and is connected, the P end of described rectification module 3, the P end of inversion module to be held with the P of DC bus respectively by lamination copper bar 4 and is connected, the N end of described rectification module 3, the N end of inversion module to be held with the N of DC bus respectively by lamination copper bar 4 and is connected.
In embodiments of the present invention, the line mode of power acquisition upper entering and lower leaving, and adopt the design of lamination copper bar 4, farthest decrease the cable run distance of copper bar, facilitate Modular frequency converter in parallel, reduce stray inductance, reduce peak voltage to the impact of inversion module, improve the stable type of system; D.C. contactor 1 riding position is different from traditional frequency conversion device, D.C. contactor 1 co-operation when realizing in parallel; One end of D.C. contactor 1 is held with the P of DC bus by lamination copper bar 4 and is connected, the other end of D.C. contactor 1 is connected with electrochemical capacitor 8 positive pole, avoiding D.C. contactor 1 is arranged on DC bus, saves copper bar, makes large area use lamination copper bar 4 to become possibility.
In embodiments of the present invention, power drives plate 10 is welded on above inversion module, is connected with inversion module by lamination copper bar 4.Because large area uses lamination copper bar 4, cable run distance is short, and positive and negative lamination copper bar 4 makes distributed inductance cancel out each other, and effectively reduces loop peak voltage, reduces the damage that switching device causes because of peak voltage, improves product stability.Full symmetric on UVW three-phase driving signal circuit, removes traditional flexible cord and connects, conveniently produce assembling, and not easily occurs wrong, connects anti-, improves product stability, reduces the volume of cabinet 9 simultaneously.Power drives plate 10 specialized designs, is used alone and can exports UVW drive singal respectively, and use in parallel, in each Modular frequency converter, drive plate is as the output of a certain phase.
In embodiments of the present invention, three-phase input end 2 is arranged on the top of cabinet 9, and rectification module 3 is connected with described three-phase input end 2 by copper bar.Input terminal adopts exempts from line ball design, by screw locking, need not take cabinet 9 apart, without punch down head, greatly facilitate in-site installation.
In embodiments of the present invention, inversion module is connected with described three-phase output end 6 by copper bar.Lead-out terminal also employing exempts from line ball design, passes through screw locking.
In embodiments of the present invention, Modular frequency converter also comprises Hall element 5, and described Hall element 5 is fixed on three-phase output end 6.
In embodiments of the present invention, Modular frequency converter also comprises radiator 11, and radiator 11 is connected with the bottom of rectification module 3, inversion module.Wherein, radiator 11 adopts highly dense profile of tooth material to make, and air channel is unimpeded improves radiating effect without blocking, and reduce the size of radiator 11, whole cabinet 9 width reduces greatly, is only traditional frequency conversion body long-pending 1/2.
In embodiments of the present invention, Modular frequency converter also comprises fan 12, and described fan 12 is arranged on the side near described three-phase output end 6 in cabinet 9.
In embodiments of the present invention, electrochemical capacitor 8 is reverse buckling type electrochemical capacitor, is connected with lamination copper bar 4.
Modular frequency converter in parallel of the present invention, comprises three Modular frequency converter, and three-phase input end 2 of each described Modular frequency converter is connected by copper bar, as a road of Modular frequency converter three-phase input in parallel; Three-phase output end 6 of each described Modular frequency converter is connected by copper bar, as the road that Modular frequency converter three-phase in parallel exports; The DC bus P of described three Modular frequency converter holds or N end is connected by lamination copper bar 4, and the DC bus P as Modular frequency converter in parallel holds or N end; The master control borad of a Modular frequency converter in described three Modular frequency converter is connected with the power drives plate 10 of each Modular frequency converter by winding displacement, and the power drives plate 10 of described three Modular frequency converter selects drive singal by toggle switch.Compare than prior art, each Modular frequency converter of Modular frequency converter in parallel can be used alone, also can by assembling realization is in parallel fast, simply, power output expands to three times of single module, realize the product of whole high-power section, accomplish the modularization of frequency converter, standardization, can parallel connectionization, material category and the quantity of frequency converter producer can be greatly reduced, shorten buying and production cycle, the simultaneously field service of convenient for maintaining personnel and replacing.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a Modular frequency converter in parallel, is characterized in that, comprises three Modular frequency converter, and three-phase input end (2) of each described Modular frequency converter is connected by copper bar, as a road of Modular frequency converter three-phase input in parallel; Three-phase output end (6) of each described Modular frequency converter is connected by copper bar, as the road that Modular frequency converter three-phase in parallel exports; The DC bus P of described three Modular frequency converter holds or N end is connected by lamination copper bar (4), and the DC bus P as Modular frequency converter in parallel holds or N end; The master control borad of a Modular frequency converter in described three Modular frequency converter is connected with the power drives plate (10) of each Modular frequency converter by winding displacement, and the power drives plate (10) of described three Modular frequency converter selects drive singal by toggle switch.
2. Modular frequency converter in parallel as claimed in claim 1, is characterized in that, three-phase output end (6) of each described Modular frequency converter is connected by copper bar and is connected with a Hall element (5).
3. Modular frequency converter in parallel as claimed in claim 1, is characterized in that, described Modular frequency converter comprises cabinet (9), rectification module (3), lamination copper bar (4), charging resistor (7), electrochemical capacitor (8), D.C. contactor (1), three-phase input end (2), three-phase output end (6), inversion module, power drives plate (10), described three-phase input end (2) is arranged on the top of cabinet (9), described three-phase output end (6) is arranged on the bottom of cabinet (9), one end of described D.C. contactor (1), one end of charging resistor (7) is all held with the P of DC bus and is connected, the other end of described D.C. contactor (1), the other end of charging resistor (7) is all connected with electrochemical capacitor (8) positive pole, and the negative pole of described electrochemical capacitor (8) is held with the N of DC bus and is connected, the P end of described rectification module (3), the P end of inversion module to be held with the P of DC bus respectively by lamination copper bar (4) and is connected, and the N of described rectification module (3) holds, the N end of inversion module to be held with the N of DC bus respectively by lamination copper bar (4) and is connected.
4. Modular frequency converter in parallel as claimed in claim 3, is characterized in that, described power drives plate (10) is welded on described inversion module, is connected with described inversion module by winding displacement.
5. Modular frequency converter in parallel as claimed in claim 3, is characterized in that, described rectification module (3) is connected with described three-phase input end (2) by copper bar.
6. Modular frequency converter in parallel as claimed in claim 3, is characterized in that, described inversion module is connected with described three-phase output end (6) by copper bar.
7. Modular frequency converter in parallel as claimed in claim 3, is characterized in that, described Modular frequency converter also comprises Hall element (5), and described Hall element (5) is fixed on described three-phase output end (6).
8. Modular frequency converter in parallel as claimed in claim 3, it is characterized in that, described Modular frequency converter also comprises radiator (11), described radiator (11) is connected with the bottom of described rectification module (3), inversion module, and described radiator (11) adopts highly dense profile of tooth material to make.
9. Modular frequency converter in parallel as claimed in claim 3, it is characterized in that, described Modular frequency converter also comprises fan (12), and described fan (12) is arranged on the side near described three-phase output end (6) in cabinet (9).
10. Modular frequency converter in parallel as claimed in claim 3, is characterized in that, described electrochemical capacitor (8) is reverse buckling type electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746912.3A CN104467452A (en) | 2014-12-09 | 2014-12-09 | Parallel module type frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746912.3A CN104467452A (en) | 2014-12-09 | 2014-12-09 | Parallel module type frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN104467452A true CN104467452A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410746912.3A Pending CN104467452A (en) | 2014-12-09 | 2014-12-09 | Parallel module type frequency converter |
Country Status (1)
| Country | Link |
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| CN (1) | CN104467452A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578815A (en) * | 2014-12-18 | 2015-04-29 | 佛山市美传科技有限公司 | Major loop structure of frequency converter |
| CN107086796A (en) * | 2016-02-15 | 2017-08-22 | 西门子公司 | Current transformer with DC voltage intermediate circuit |
| CN108449001A (en) * | 2018-05-10 | 2018-08-24 | 珠海格力电器股份有限公司 | Electric cabinet, and modular combination method and device of electric cabinet |
| CN110611440A (en) * | 2019-10-16 | 2019-12-24 | 广州标程电气有限公司 | Frequency converter |
-
2014
- 2014-12-09 CN CN201410746912.3A patent/CN104467452A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578815A (en) * | 2014-12-18 | 2015-04-29 | 佛山市美传科技有限公司 | Major loop structure of frequency converter |
| CN107086796A (en) * | 2016-02-15 | 2017-08-22 | 西门子公司 | Current transformer with DC voltage intermediate circuit |
| CN107086796B (en) * | 2016-02-15 | 2019-10-08 | 西门子公司 | Current transformer with DC voltage intermediate circuit |
| CN108449001A (en) * | 2018-05-10 | 2018-08-24 | 珠海格力电器股份有限公司 | Electric cabinet, and modular combination method and device of electric cabinet |
| CN110611440A (en) * | 2019-10-16 | 2019-12-24 | 广州标程电气有限公司 | Frequency converter |
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Application publication date: 20150325 |
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