CN1996735A - A connection method and its structure for the current adjusting device and current-adjusting transformer - Google Patents
A connection method and its structure for the current adjusting device and current-adjusting transformer Download PDFInfo
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- CN1996735A CN1996735A CN 200610043169 CN200610043169A CN1996735A CN 1996735 A CN1996735 A CN 1996735A CN 200610043169 CN200610043169 CN 200610043169 CN 200610043169 A CN200610043169 A CN 200610043169A CN 1996735 A CN1996735 A CN 1996735A
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Abstract
This invention relates to power device technique field and relates to commuter device and transducer connection method and its structure, wherein, in connection type, the commuter device adopts different inverse parallel method; the commuter set arms adopt axis symmetrical fix elements structure without change of element number; each set adopts cathode and anode distribution set by symmetrically.
Description
Technical field
The present invention relates to electrical equipment technical field, be specifically related to the coupling method and the structure thereof of a kind of rectifying device and rectifier transformer.
Background technology:
Power rectifier unit draw bail is at present: when rectifier transformer is the cophase counter parallel connection connecting structure, rectifying device also is necessary for the cophase counter parallel connection connecting structure, exchanges the inlet wire bus comprising the rectifier transformer secondary side bus that be arranged in parallel with the rectifying device corresponding with it; Order situation from rectifying device, of home make rectifying device all adopts the cophase counter parallel connection technology basically, and all be that customer requirements adopts the cophase counter parallel connection technology, illustrate that this technology of cophase counter parallel connection has market, cophase counter parallel connection is a kind of coupling method, be a kind of big at ac conduction busbar electric current, reduce the technology of induction reactance under the condition of conductive bus bar distance, but when exchanging guide apart from weak point, direct current system voltage height, the element that uses is under the conditions such as 4 inches and above specification, its technical advantage has just been given up the throne, its inferior position just highlights, the loss that exists is big, and cost is higher, needs often to safeguard, safeguard inconvenient, system's waveform is undesirable, the big and unfavorable problem of the key technical indexes of cabinet floor space.
Summary of the invention:
The object of the present invention is to provide a kind of rectifying installation loss is low, rectification efficiency the is high rectifying device and the coupling method of rectifier transformer.
The object of the present invention is to provide a kind of said method Rectification Power Factor draw bail that connect, that loss reduces, cost is low and easy to maintenance that adopts.
For achieving the above object, the technical solution used in the present invention is:
The coupling method of a kind of rectifying device and rectifier transformer, when described rectifier transformer adopted the cophase counter parallel connection bind mode, rectifying device adopted non-cophase counter parallel connection bind mode.
A kind of Rectification Power Factor draw bail, its special character is: the rectification brachium pontis 1 of described Rectification Power Factor adopts the structure of axial symmetry installation elements, under the constant situation of brachium pontis bus rectifier cell quantity, every group be provided with adopt cloudy altogether, sun arranges that the circuit inlet wire is that equilibrium is symmetrical arranged altogether.
When above-mentioned Rectification Power Factor draw bail is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, shared two rectification brachium pontis.
On each above-mentioned rectification brachium pontis 1 bus in pairs along the two-sided rectifier cell that is pressed with of bus length direction, the fast acting fuse 6 that every group of rectifier cell 2 connects by copper joint cover 3 is arranged on the fast molten water-cooled bus 5, should be connected with interchange inlet wire plate 4 by soon molten water-cooled bus 5, be provided with insulated connecting piece respectively between the described fast molten water-cooled bus 5 and between the interchange inlet wire plate 4.
The present invention is with respect to prior art, and its advantage is as follows:
1, loss reduces: non-cophase counter parallel connection rectifying device, and busbar arrangement is simple, clear, under the constant situation of brachium pontis bus rectifier cell quantity, every group is provided with employing and is total to the moon, is total to the sun layout, the balanced symmetry of three phase bridge circuit inlet wire, the current direction length direction shortens, and loss reduces; When arranging by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifying device, shared two rectification brachium pontis have reduced rectification brachium pontis quantity, have reduced the loss of rectifying installation, have improved rectification efficiency.
2, cost is low: adopt non-cophase counter parallel connection rectifying device, when arranging by three-phase bridge six pulse wave rectifiers, only need with 2 rectification brachium pontis, have the moon altogether, have positive rectification brachium pontis altogether, per three input circuit A, B, C form one group and are total to the moon or are total to positive rectification brachium pontis, and totally 6 input circuits are formed 2 rectification brachium pontis; In addition, the direct current copper busbar of confluxing needn't be set, can save the consumption of copper busbar, the loop is also reduced in simultaneously corresponding water route, and the distance between rectifier transformer and the rectifier can shorten to greatest extent, and its connection bus consumption reduces, and so just can save raw material from many aspects, improve the reliability in water route, maintenance also reduces relatively.
3, maintenance reduces and is easy to maintenance: adopt non-cophase counter parallel connection rectifier structure, its more reasonable structure, move more reliable, reduced maintenance, the reliability in water route improves simultaneously, maintenance also reduces relatively, and the spacing in this structure between the rectification brachium pontis can strengthen, and has so just thoroughly avoided the short circuit phenomenon between brachium pontis; And bigger because of the space that self leaves in the cabinet, therefore needn't consider to stay access path again, so just shortened the connection bus between rectifier transformer and the rectifier, be convenient to safeguard, overhaul.
4, system's waveform is more satisfactory: adopt the rectification brachium pontis of this structure, the whole system ripple will be more reasonable, and improve the commutation system power factor.
5, the cabinet floor space is little: in the identical rectification pulse wave circuit, its cabinet overall dimension reduces floor space less than adopting original structure designed system cabinet.And use to install more conveniently, and also saved steel simultaneously, reduced cost, low loss.
6, the arrangements of elements of non-cophase counter parallel connection structure is the branch road axially symmetric structure, adopts the two-sided element that press-fits, each branch impedance is the same, thus with regard to having avoided to a certain extent because the current stabilizing factor decline problem that the layout of element causes; Can solve equal flow problem from structure, all mobility is improved; Solved the dissatisfactory problem of rectification brachium pontis current stabilizing factor of many rectifier cell parallel connections.
Description of drawings:
Fig. 1 is the cophase counter parallel connection winding diagram for the coupling method of existing rectifying device and rectifier transformer;
Fig. 2 is non-cophase counter parallel connection rectification winding diagram for the coupling method of rectifying device and rectifier transformer;
Fig. 3 is electric current and Distribution of Magnetic Field figure between cophase counter parallel connection three-phase bridge rectifier arm;
Fig. 4 is a cophase counter parallel connection three-phase bridge distribution map of the electric field;
Fig. 5 is non-cophase counter parallel connection structure electric field strength and magnetic field distribution figure;
Fig. 6 is the outlet of non-cophase counter parallel connection three-phase bridge rectifier transformer valve side;
Fig. 7 is electric-field intensity distribution figure;
Fig. 8 is existing interchange inlet wire and rectifying device for contrary also, exchanges laggardly, goes out structural representation under the direct current;
Fig. 9 is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the front view that the positive and negative front and back of direct current are arranged;
Figure 10 is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the vertical view that the positive and negative front and back of direct current are arranged;
Figure 11 is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the left view that the positive and negative front and back of direct current are arranged;
Figure 12 is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the positive and negative structural representation of arranging up and down of direct current;
Figure 13 is for paired along the two-sided structural representation that is pressed with rectifier cell of bus length direction on the single brachium pontis bus of the present invention.
Embodiment:
The present invention is the coupling method of rectifying device and rectifier transformer, and when its rectifier transformer adopted the cophase counter parallel connection bind mode, rectifying device adopted non-cophase counter parallel connection bind mode, has promoted fail safe, the stability of Rectification Power Factor.For the use of Rectification Power Factor, operation have increased a kind of coupling method.
Referring to Fig. 1, Fig. 2, the coupling method of rectifying device and rectifier transformer are cophase counter parallel connection winding diagram and non-cophase counter parallel connection winding diagram;
Prove as follows once, existing cophase counter parallel connection rectifying installation insecurity:
1, take place two during with contrary and phase insulation fault:
(1), the conduction in the one-period becomes-BB in proper order;-CC; B (B); C (C), (and normal conduction order: AB, AC, BC, BA, CA, CB ,-A-B ,-A-C ,-B-C ,-B-A ,-C-A ,-C-B).
(2), the direct voltage peak value will rise to the twice under the normal condition,, component pressure raises 2 times.
(3), separate series, when the same contrary of a rectifier cabinet and phase insulation destroyed, its direct voltage will raise 1.82 times, potline current all can be grabbed to the output of accident cabinet, and this will cause serious consequence for large-current electric.
Theoretical foundation is:
The mean value of direct-flow no load voltage under the malfunction:
The mean value of direct-flow no load voltage: Udio '=1.35U under the normal condition
2L
So: Udio=1.82Udio '
(4), under this malfunction, be extended for 90 ° between conduction region, be equivalent to a bridge system and export whole load currents, the moment current amplitude that flows through of brachium pontis of therefore conducting electricity reaches four times (under the normal condition, half load current is respectively exported in two bridge parallel connections) under the normal condition.
(5), when the dc-side short-circuit accident takes place when, if N parallel machine operation arranged, then have the multicomputer electric current to compile in the accident cabinet, contrary and section bus is stressed will be by N
2Increase, the cophase counter parallel connection structure is difficult to bear.
2, there is unsettled electromagnetic field in complex distribution in the cabinet:
Referring to Fig. 3, Fig. 4, by+-+-... perhaps+--+... +--+arrange.The cophase counter parallel connection principle require to be offset the outer magnetic line of force just, but increase the weight of+-or-+between magnetic field intensity, for this opposite magnetic line of force is provided, need to introduce opposite electric current, and inverse current needs opposite potential to satisfy, and makes local voltage (gesture) increase 2-3 doubly, voltage relationship complexity in the cabinet;
Illustrate:
Calculate the magnetic field intensity between ZHS-35KA/1300V rectifier cabinet cophase counter parallel connection:
B=0.2T, electric field strength E=7*10
5(v/m)
Electromagnetic energy density: w therebetween
Max≈ ε E
2/ 2+B
2/ 2 μ ≈ ε
rε
0E
2/ 2+B
2/ 2 μ
0≈ 1.5*10
13(J/mm
3)
ε
0Permittivity of vacuum farad/every meter
ε
rRelative permittivity farad/every meter
μ
0Permeability of vacuum henry/every meter
This shows: when short circuit occurring, under electrodynamic effect, electromagnetic energy is unusual in the cabinet, this energy with add 2 times of voltage potential effects (increasing the weight of accident situation) because direct voltage improves, produce the shape enormous impact of seemingly being struck by lightning, make the rectifier cabinet puncture that crumbles.
3, cophase counter parallel connection three-phase bridge rectifier cabinet, it arranges as follows with contrary and brachium pontis electric current and magnetic field: referring to Fig. 3:
From Distribution of Magnetic Field, because l
0Very little, separately the magnetic field of Chan Shenging influence each other very big, so total Distribution of Magnetic Field is very inhomogeneous, instability, and the internal magnetic field between two arms for the stack magnetic field.
With contrary and three-phase bridge: f
0=1.63K
I* (L/l
0 2) * (ip) 2
Because K
I, L (bus length) is identical, under the system condition certain condition, the short-circuit impact electric current also is the same.
Suppose: non-with contrary and three-phase bridge l=1500mm, and with contrary and three-phase bridge l
0So=100mm l 〉=15*l
0
Therefore non-with contrary and three-phase bridge: f≤(1/15
2) f
0=(1/225) f
0
Add that the internal magnetic field between the cophase counter parallel connection arm is stack magnetic field, huge the well imagining of electric power that its short circuit produces.And cophase counter parallel connection bus structure form is also little more many than aforementioned calculation numerical value.
4, element mounting means defective
A, (the permission stress of copper bus-bar is 1400kg/cm to be subjected to copper stress restriction
2) installation of incompatibility large scale diameter element.
B, strict owing to the element press-loading process cannot say for sure to demonstrate,prove the smooth precision of press-fiting of element, causes element to have equal flow problem.
There is the water internal resistance in the water route complicated layout in c, the cabinet on the branch road.Under complicated magnetic field, just can't solve the galvano-cautery problem.
E, direct voltage are high more, and risk strengthens.
5, busbar arrangement complexity, the secondary line complexity.Operation maintenance device security extreme difference.
6, the complicated water swivel in water route is many.And each branch road mass flow discrepancy is difficult to resolve certainly galvano-cautery problem under high voltage.
7, because of electric current flows to along the bus length direction, loss is bigger.
Referring to Fig. 5, Fig. 6, Fig. 7;
Fig. 5 is non-cophase counter parallel connection structure electric field strength and magnetic field distribution figure; Fig. 6 is the outlet of non-cophase counter parallel connection three-phase bridge rectifier transformer valve side; Fig. 7 is electric-field intensity distribution figure;
In non-cophase counter parallel connection circuit (axial symmetry element rectifier bridge arm configuration), the advantage that has is as follows:
1, during fault, dc voltage reduces, and component pressure is constant or reduce, can the expansion accident.
2, structural layout makes element, molten bus is unstressed soon, and when dc-side short-circuit or internal fault, electric power only is the 1/200-1/300 of cophase counter parallel connection circuit.
3, be the stable electrical Distribution of Magnetic Field in the cabinet, it is clear, even that electromagnetic field distributes.
Specifically distribute referring to Fig. 5, Fig. 6, Fig. 7;
Calculated value is:
E=4*10
3(V/m) be 1/175th of cophase counter parallel connection.
B=0.0025T is nearly 1/1000th of a cophase counter parallel connection.
4, element is installed as the axial symmetry mode, the unstressed defective of bus.Concrete advantage is:
1), adapting to major diameter size element installs.
2), there is not equal flow problem.
3), there is the galvano-cautery problem hardly.
4), high fail safe is arranged also under high voltage.
5) even fault is arranged, can the expansion accident yet.
6), energy of electromagnetic field point is even.
7), install simply, bus self is unstressed.
5, bus is simple, and secondary line is simpler.
6, galvano-cautery is little, and water swivel is few, and the water route is simple, and each branch road water yield is even.
7, electric current along the bus cross-current to, bus loss less (can ignore).
Referring to Fig. 8, Fig. 8 is existing interchange inlet wire and rectifying device for contrary also, exchanges laggardly, goes out structural representation under the direct current; With contrary and structure is 12 phase inlet wires, whenever is 1 group mutually.Each 12 of fast molten bus and element buses.Adjacent two-phase is close to installation, and is very little with contrary and spaced apart, generally has only 50MM.Distance was also very little between direct current was positive and negative.The same transformer of inlet wire "+-+-" be arranged in order.Right 6 positive poles of direct current; A left side 6 positive poles outlet of confluxing separately.Fast molten bus is single face installation and little apart.The element bus is that single face pastes, totally 12 dc buss, 6 just, 6 negative, following outlet.
Referring to Figure 13, Figure 13 is for paired along the two-sided structural representation that is pressed with rectifier cell of bus length direction on the single brachium pontis bus of the present invention.
In pairs along the two-sided rectifier cell 2 that is pressed with of bus length direction, and the rectifier cell 2 every phases that distribute along its length in its side can many parallel connections on said single brachium pontis 1 bus; Be arranged on the fast molten water-cooled bus 5 by the copper joint cover 3 and the fast acting fuse 6 of rectifier cell 2 corresponding connections, this molten soon water-cooled bus 5 is connected with interchange inlet wire plate 4; Be provided with insulation board between said fast molten water-cooled bus 5 and brachium pontis bus 1 top and the bottom.
Referring to Fig. 9, Figure 10, Figure 11, it is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the structural representation that the positive and negative front and back of direct current are arranged.
Exchanging inlet wire is 12 corresponding connections with rectifier transformer, and the transformer outlet is with contrary and structure, outlet "+-+-" be arranged in order.Rectifier cabinet exchange be arranged in order about inlet wire corresponding with transformer, and before and after Xiang Weiyi organizes into fast molten bus each 6.The rear portion is anodal phase, and the front portion is the negative pole phase.Fast molten bus is single face installation and big apart.The element bus is the cloudy altogether anode shaft altogether of a two-sided subsides symmetry mounting means.
With a is example mutually: interchange inlet wire the 1st phase and the 3rd is all mutually and exchanges a+, and 2 fast molten buses at a distance of 300MM, advance altogether on 1 positive bus-bar in back and draw from laggard back.Interchange inlet wire the 2nd phase and the 4th is all mutually and exchanges a-, and 2 fast molten buses advance on 1 negative busbar in front to draw at a distance of 300MM altogether from laggard front.Arrange before and after the positive and negative busbar, position, the left and right sides differs 150MM, and spacing 150MM is corresponding with transformer alternating " a+a-a+a-".Positive pole is all out, and anodal is 900MM at the back negative pole in preceding spaced apart.Distance is 1180MM between positive and negative.
Referring to Figure 12, Figure 12 is that Rectification Power Factor draw bail of the present invention is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, the positive and negative structural representation of arranging up and down of direct current;
Exchanging inlet wire is 12 corresponding connections with rectifier transformer, and the transformer outlet is with contrary and structure, outlet "+-+-" be arranged in order.Rectifier cabinet exchanges inlet wire and organizes every Xiang Weiyi, each 6 up and down.Top is anodal phase, and the bottom is the negative pole phase.Fast molten bus is that single face is installed, and is the side inlet wire at a distance of big and inlet wire direction, and electrical conduction current is the longitudinal section.The element bus is the cloudy altogether anode shaft altogether of a two-sided subsides symmetry mounting means.
With a is example mutually: interchange inlet wire the 1st phase and the 3rd is all mutually and exchanges a+, advances fast molten bus from the upper back, at a distance of 300MM, is total on top to advance on 1 positive bus-bar.Interchange inlet wire the 2nd phase and the 4th is all mutually and exchanges a-, advances fast molten bus from the upper back, at a distance of 300MM, advances under 1 negative busbar in bottom altogether.Positive and negative busbar is arranged above and below, and position, the left and right sides differs 150MM, and spacing 150MM is corresponding with transformer alternating " a+a-a+a-".Go out on the anodal three-phase, go out under the negative pole three-phase and spaced apart is 900MM.
Connecting rectifying device at the non-cophase counter parallel connection of the rectification brachium pontis that uses the axial symmetry installation elements has overcome cophase counter parallel connection to connect the loss that rectification exists big, cost is higher, need often to safeguard, safeguard inconvenient, system's waveform is undesirable, the big and unfavorable shortcoming of the key technical indexes of cabinet floor space.
Contrast from main structure:
1), cophase counter parallel connection connects, the structure relative complex, exchange guide, direct current branch guide length is longer, can only adopt the low capacity element, and low capacity element threshold voltage is apparently higher than big volume element, efficient will be hanged down, fail safe is 0.75～0.85, non-relatively cophase counter parallel connection low (its fail safe be generally 0.9 and more than).
2), in the cophase counter parallel connection rectifying device water-cooled bus of installation elements owing to be subjected to element to press-fit stress influence, limited the use of big volume element, can only adopt low capacity element (it is more suitable to be typically chosen in element below 4 inches), and low capacity element threshold voltage is apparently higher than big volume element, and efficient will be hanged down.But not cophase counter parallel connection rectifying device element adopts symmetry to install on bus, and its element press-fits stress on element, and bus can not damage that (the permission stress of copper bus-bar is 1400kg/cm because being subjected to stress
2).So this structure is specially adapted to the rectifying device that 4 inches and above element are installed, and big volume element threshold voltage is starkly lower than the low capacity element, makes rectification efficiency higher.
3), from present mounting means, cophase counter parallel connection rectification rectifier transformer to the spacing of rectifier cabinet about 1 meter～1.5 meters, when the arm electric current when 5KA is following, the unlikely serious heating that causes the steel construction housing, housing also can adopt the housing of plastic-steel structure simultaneously.Adopt non-cophase counter parallel connection rectifier transformer shorter, about 0.5 meter～1.0 meters to the spacing of rectifier cabinet.Promptly save material, also reduced loss.
Once more, in the rectifying device of high voltage, big electric current, adopt cophase counter parallel connection rectifier structure circuit, because distance is very near between brachium pontis, it exists intrinsic short-circuit risks between contrary and brachium pontis.Concrete analysis is:
1), from designing consideration: the cophase counter parallel connection rectifier structure makes brachium pontis complex distribution in the cabinet, has unsettled electricity, magnetic field: by+-+-... perhaps+--+... +--+arrange.The cophase counter parallel connection principle requires to offset the outer magnetic line of force just, but increase the weight of+-or-+between magnetic field intensity, for this opposite magnetic line of force is provided, need to introduce opposite electric current, and inverse current needs opposite potential to satisfy, impel local voltage (gesture) to increase 2-3 doubly, cause voltage relationship complexity in the cabinet, the short-circuit risks aggravation.
2), consider from structural configuration: for the cophase counter parallel connection circuit, the commutation overvoltage also can influence with contrary and phase insulation.In commutation process, with contrary and the alternate 3E that bears
CVoltage because with contrary and phase spacing＜100mm, the defective on any packaging technology, for example various conductor burrs and outstanding wedge angle etc. can cause that all insulation breakdown causes damaging rectifier transformer.The unit output voltage is high more, and the unit output current is big more, and this problem is outstanding all the more.
In sum: the present invention has promoted fail safe, the stability of Rectification Power Factor for use, the operation of Rectification Power Factor have increased a kind of new mode and draw bail.
Claims (4)
1, the coupling method of a kind of rectifying device and rectifier transformer is characterized in that: when described rectifier transformer adopted the cophase counter parallel connection bind mode, rectifying device adopted non-cophase counter parallel connection bind mode.
2, a kind of Rectification Power Factor draw bail, it is characterized in that: the rectification brachium pontis (1) of described Rectification Power Factor adopts the structure of axial symmetry installation elements, under the constant situation of brachium pontis bus rectifier cell quantity, every group be provided with adopt cloudy altogether, sun arranges that the circuit inlet wire is that equilibrium is symmetrical arranged altogether.
3, Rectification Power Factor draw bail according to claim 2 is characterized in that: when described Rectification Power Factor draw bail is arranged by three-phase bridge six pulse wave rectifiers of non-cophase counter parallel connection rectifier system, and shared two rectification brachium pontis.
4, according to claim 2 or 3 described Rectification Power Factor draw bails, it is characterized in that: on described each rectification brachium pontis (1) bus in pairs along the two-sided rectifier cell that is pressed with of bus length direction, the fast acting fuse (6) that every group of rectifier cell (2) connects by copper joint cover (3) is arranged on the fast molten water-cooled bus (5), be somebody's turn to do soon molten water-cooled bus (5) and be connected with interchange inlet wire plate (4), described fast melting between the water-cooled bus (5) and between the interchange inlet wire plate (4) is provided with insulated connecting piece respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043169 CN1996735A (en) | 2006-07-17 | 2006-07-17 | A connection method and its structure for the current adjusting device and current-adjusting transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610043169 CN1996735A (en) | 2006-07-17 | 2006-07-17 | A connection method and its structure for the current adjusting device and current-adjusting transformer |
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| CN1996735A true CN1996735A (en) | 2007-07-11 |
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ID=38251706
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441241A (en) * | 2008-12-12 | 2009-05-27 | 广州智光电气股份有限公司 | High-pressure frequency conversion phase shift or rectifier transformer load simulating device |
| CN101924455A (en) * | 2010-07-27 | 2010-12-22 | 中国科学院等离子体物理研究所 | Current equalizing structure of high-current rectifier bridge arm |
| CN102184770A (en) * | 2011-01-26 | 2011-09-14 | 张家港市沙洲特种变压器制造有限公司 | Co-phase counter in-parallel rectifying transformation device |
| CN104184340A (en) * | 2014-08-29 | 2014-12-03 | 永济新时速电机电器有限责任公司 | Novel rectifier cabinet |
-
2006
- 2006-07-17 CN CN 200610043169 patent/CN1996735A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441241A (en) * | 2008-12-12 | 2009-05-27 | 广州智光电气股份有限公司 | High-pressure frequency conversion phase shift or rectifier transformer load simulating device |
| CN101924455A (en) * | 2010-07-27 | 2010-12-22 | 中国科学院等离子体物理研究所 | Current equalizing structure of high-current rectifier bridge arm |
| CN102184770A (en) * | 2011-01-26 | 2011-09-14 | 张家港市沙洲特种变压器制造有限公司 | Co-phase counter in-parallel rectifying transformation device |
| CN104184340A (en) * | 2014-08-29 | 2014-12-03 | 永济新时速电机电器有限责任公司 | Novel rectifier cabinet |
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