CN103178721A - High-capacity five-level converter power cabinet - Google Patents
High-capacity five-level converter power cabinet Download PDFInfo
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- CN103178721A CN103178721A CN2013101171474A CN201310117147A CN103178721A CN 103178721 A CN103178721 A CN 103178721A CN 2013101171474 A CN2013101171474 A CN 2013101171474A CN 201310117147 A CN201310117147 A CN 201310117147A CN 103178721 A CN103178721 A CN 103178721A
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Abstract
The invention discloses a high-capacity five-level converter power cabinet which belongs to the technical field of semiconductor switches. The five-level converter power cabinet comprises a rectifying power cabinet, a first inversion power cabinet, a capacitor box and a second inversion power cabinet in sequence from left to right, wherein the rectifying power cabinet internally comprises three groups of independent rectifying power modules; the capacitor box internally comprises three independent capacitor power modules; and the first and second inversion power cabinets internally comprise three groups of independent inversion power modules respectively. According to the high-capacity five-level converter power cabinet, a compact circuit connection form is provided, so that the stray inductances of the circuits are decreased and the output capability of a device is improved. At the same time, when a plurality of five-level convertor power cabinets are connected in parallel for output use, the output capability of the device can be improved to a greater extent, so that the working performance of the device is ensured.
Description
Technical field
The invention belongs to the semiconductor switch technical field, a kind of integral gate change transistor (Integrated Gate Commutated Thyristor particularly is provided, be called for short IGCT) large capacity Five-level converter power cabinet structure, it is applicable in 3～100MVA high-power converter, can be widely used in the high-power transmission field.
Background technology
Integrated gate commutated thyristor (IGCT) is that gate drive circuit and door pole stream-exchanging thyristor GCT are integrated in an integrally formed device.Door pole stream-exchanging thyristor GCT is based on a Novel power semiconductor device of GTO structure, it not only has identical high blocking ability and low on-state pressure drop with GTO, and the switch performance identical with IGBT arranged, having the chief of GTO and IGBT concurrently, is a kind of comparatively ideal MW class, Medium voltage switch or circuit breaker device.
Have the high-speed switch function because IGCT has as IGBT, conduction loss is low as GTO, and particularly reliability is higher in high pressure, the large various applications of electric current.In the IGCT device, all elements are contained in compact module, have reduced cost.The IGCT voltage source inverter is compared with the topological structure of other types frequency converter, and structure is simpler, and efficient is higher.
The application technology of IGCT is very ripe in the world at present, but but also is at home the starting stage, does not also have the matured product of IGCT current transformer to come out.Complete IGCT active rectifying circuit or inverter circuit comprise IGCT, anti-paralleled diode, clamp circuit device etc., if these elements are disperseed to be electrically connected with bus or wire after assembling again, not only its to take volume larger, and make the circuit stray inductance increase.The increase of stray inductance can make the shutoff voltage of IGCT raise, and affects the safe operation of IGCT device.In addition, the (PCC) power of IGCT disperses to install, and also is unfavorable for the carrying out of maintenance work.
Summary of the invention
Purpose of the present invention is for the high-power five level frequency conversion device of the power electronic device such as employing IGCT, proposes a kind of minimizing circuit stray inductance, improves the modular structure of device fan-out capability, is convenient to install winding, applicable to different engine requests.
A kind of large capacity Five-level converter power cabinet provided by the invention, the device that is formed by rectified power cabinet (1), the first inverter power cabinet (2), capacitor box (3) and the second inverter power cabinet (4) successively from left to right.Wherein, rectified power cabinet (1) is inner comprises three groups of separate rectified power modules (5), and every group of rectified power module (5) is upper with some power electronic device devices, and the connection by the internal copper bus realizes direct current output; Capacitor box (3) is inner comprises three groups of separate electric capacity power models (6), on every group of electric capacity power model (6), some dc capacitors has been installed; The inner three groups of separate inverted power modules (7) that comprise respectively of the first inverter power cabinet (2) and the second inverter power cabinet (4), every group of inverted power module (7) is upper with four IGCT devices.
In rectified power cabinet (1), be divided into three layers in from top to bottom, arrange one group of rectified power module (5) for every layer, every group of rectified power module (5) is a mutually complete brachium pontis.On rectified power cabinet (1) depth direction, rectified power module (5) is positioned at forward position, cabinet middle part, and the rectification module female pipe in water route (8) is positioned at the cabinet front portion.For conserve space, the rectification module water route vertical tube (9) of rectified power cabinet (1) is arranged in the side of rectified power cabinet (1), corresponding with rectification module water route female pipe (8) interface of each rectified power module (5), interconnected by ball valve.Rectification module alternating current bus bar (10) and rectification module DC master row (11) are positioned at the rear portion of rectified power cabinet (1).Simultaneously, three groups of rectifier cabinet direct current horizontal busbars (12) have been arranged at rectified power cabinet (1) rear portion, and three groups of rectifier cabinet direct current horizontal busbars (12) are arranged in parallel in vertical direction at a certain distance.Simultaneously, comprise three rectification horizontal busbars (13) in every group of rectifier cabinet direct current horizontal busbar (12), three rectification horizontal busbars (13) also are arranged in parallel according to a determining deviation in vertical direction, are fixed on the corresponding installing hole of rectified power cabinet (1) cabinet by insulator (14) and direct current horizontal busbar support (15).Such design makes whole rectified power cabinet (1) be divided into the three functions district, and water route and circuit separate, and are convenient to installation and maintenance, avoided the interference between each interface, and structure function are clear.
For rectification module DC master row (11), need in design to reduce as much as possible its stray inductance.For this reason, rectification module DC master row (11) is arranged in the rear portion of rectified power module (5), and namely rearward position in cabinet, directly be connected with rectification horizontal busbar (13).This connected mode makes the connection busbar between circuit the shortest, has effectively reduced stray inductance therebetween, and is convenient to change, safeguard.When needing to change rectified power module (5), only need the be connected disconnection of rectification module DC master row (11) with rectification horizontal busbar (13), whole rectified power module (5) integral body can be shifted out.The effect of rectification module alternating current bus bar (10) is to introduce three-phase alternating current from rectified power cabinet (1), is arranged in the position adjacent with rectification module DC master row (11) homonymy.And at AC, need not consider the distribution parameters such as stray inductance.Therefore the design of rectification module alternating current bus bar (10) is considered from the angle of using, safeguard fully, should offer convenience for using, installing as much as possible.
The first inverter power cabinet (2) is identical with the version of the second inverter power cabinet (4).Take the first inverter power cabinet (2) as example, in cabinet, be divided into three layers in from top to bottom, arrange one group of inverted power module (7) for every layer.The first inverter power cabinet (2) and the second inverter power cabinet (4) the depth direction on, the inversion female pipe in water route (18) of inverted power module (7) and IGCT power drive partly (19) are positioned at the cabinet front portion; Inverted power module (7) and inversion direct current overlap joint busbar (20) exchange overlap joint busbar (21) and are positioned in the middle part of cabinet with inversion; The cabinet rear portion three groups of inverter cabinet direct current horizontal busbars (22) that have been arranged in parallel from top to bottom comprise three inversion horizontal busbars (23) in every group of inverter cabinet direct current horizontal busbar (22).Each inversion horizontal busbar (23) is arranged in parallel according to certain spacing in vertical direction, is fixed on the corresponding installing hole of inverter power cabinet cabinet by insulator (14) and direct current horizontal busbar support (15).The inversion direct current overlap joint busbar (20) of every group of inverted power module (7) is connected with corresponding inversion horizontal busbar (23), has realized that circuit complete in cabinet connects.
Be divided into from top to bottom three layers in capacitor box (3), arrange one group of electric capacity power model (6) for every layer.In order to save the space of whole capacitor box (3), also arranged the vertical main of confession/backwater (16) of cooling water system in the capacitor box cabinet.The vertical main of the confession/backwater of cooling water system (16) respectively with left side the first inverter power cabinet (2) and right side the second inverter power cabinet (4) in inverted power module (7) on inversion water route female pipe (18) interface corresponding, interconnected by ball valve.Capacitor box (3) depth direction is divided into three parts, front portion, middle part, rear portion.The middle part is mainly electric capacity power model (6).Anterior except the vertical main of confession/backwater (16) that is used for the installation water-cooling system, also utilized limited space that precharge transformer (17) is installed.At capacitor box (3) rear portion, arranged three groups of capacitor box direct current horizontal busbars (24) that are arranged in parallel in vertical direction, comprised three electric capacity horizontal busbars (25) in every group of capacitor box direct current horizontal busbar (24).Electric capacity horizontal busbar (25) is arranged in parallel according to certain spacing in vertical direction, is fixed on the corresponding installing hole of capacitor box (3) cabinet by insulator (14) and direct current horizontal busbar support (15).The external DC master row of electric capacity (26) of every group of electric capacity power model (6) is connected with corresponding electric capacity horizontal busbar (25), realizes electrical connection reliably.
A kind of circuit of large capacity Five-level converter power cabinet connects, and is by the inversion horizontal busbar (23) in the rectification horizontal busbar (13) in rectified power cabinet (1), the first inverter power cabinet (2), the electric capacity horizontal busbar (25) in capacitor box (3) and inversion horizontal busbar (23) the connection realization by overlapping busbar (27) between cabinet each other in inverter power cabinet (4) of being connected.
Simultaneously, in order further to improve the fan-out capability of device, can or overlap five level power cabinets more with two covers and couple together use by overlapping busbar (27) between cabinet.Two cover five level power cabinets connect when using, and arrangement mode from left to right is followed successively by: rectified power cabinet (1), the first inverter power cabinet (2), capacitor box (3), the second inverter power cabinet (4), outgoing line cabinet (28), the second inverter power cabinet (4), capacitor box (3) and the first inverter power cabinet (2).In two cover five level power cabinets, increased by one group of outgoing line cabinet (28).
In outgoing line cabinet (28) cabinet, the second inverter power cabinet (4) exchanges external busbar (29) with the outlet that right side the second inverter power cabinet (4) is drawn to anterior layout from the left side.Discharge power loop (30) can be suitably arranged at the cupboard middle part.Three groups of outgoing line cabinet direct current horizontal busbars (31) have been arranged at the cupboard rear portion.Three outlet horizontal busbars (32) have been comprised in every group of outgoing line cabinet direct current horizontal busbar (31).Horizontal busbar in the arrangement mode of outlet direct current horizontal busbar (31) and outlet horizontal busbar (32) and other cabinets is identical.
The invention has the advantages that:
The circuit connecting form of power cabinet compactness has reduced the circuit stray inductance, has improved the fan-out capability of device.Simultaneously, overlap the output in parallel of Five-level converter power cabinet more and use, the fan-out capability of raising device that can be larger has guaranteed the service behaviour of installing.
Description of drawings
Fig. 1 is the circuit theory diagrams of five level frequency conversion device;
Fig. 2 is Five-level converter power cabinet Facad structure schematic diagram;
Fig. 3 is Five-level converter power cabinet structural perspective;
Fig. 4 is the front view of two cover Five-level converter power cabinet structure charts;
Fig. 5 is two cover Five-level converter power cabinet structural perspective.
In figure:
rectified power cabinet 1, the first inverter power cabinet 2, capacitor box 3, the second inverter power cabinet 4, rectified power module 5, electric capacity power model 6, inverted power module 7, the female pipe 8 in rectification module water route, rectification module water route vertical tube 9, rectification module alternating current bus bar 10, rectification module DC master row 11, rectifier cabinet direct current horizontal busbar 12, rectification horizontal busbar 13, insulator 14, direct current horizontal busbar support 15, the vertical main 16 of the confession/backwater of water-cooling system, precharge transformer 17, the female pipe 18 in inversion water route, IGCT drive part 19, inversion direct current overlap joint busbar 20, inversion exchanges overlap joint busbar 21, inverter cabinet direct current horizontal busbar 22, inversion horizontal busbar 23, capacitor box direct current horizontal busbar 24, electric capacity horizontal busbar 25, the external DC master row 26 of electric capacity, overlap joint busbar 27 between cabinet, outgoing line cabinet 28, outlet exchanges external busbar 29, power device 30 in discharge loop, outgoing line cabinet direct current horizontal busbar 31, outlet horizontal busbar 32.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
The invention provides a kind of large capacity Five-level converter power cabinet, it is the five level frequency conversion device for power electronic device such as employing IGCT, circuit topology as shown in Figure 1, in figure, D1～D36 is rectifier diode, D37～D48 is clamping diode, C1～C6 is dc capacitor, T1～T24 is that IGCT(contains anti-paralleled diode), five level frequency conversion device inversion side adopts five level NPC/H bridge constructions, the DC side of every phase has two groups of diode three-phase commutation bridge series connection to consist of, and intermediate link is connected to dc capacitor.
The structural representation of a kind of five level power cabinets that provide of the present invention is provided Fig. 2, and described five level power cabinets are comprised of rectified power cabinet 1, the first inverter power cabinet 2, capacitor box 3 and the second inverter power cabinet 4.1 li, every rectified power cabinet comprises three groups of separate rectified power modules 5, and on every group of rectified power module 5, with 12 diode components, each diode component is realized direct current output by the connection of internal copper bus.3 li of capacitor box comprise three groups of separate electric capacity power model 6(such as Fig. 3), the dc capacitor more than four has been installed on every group of electric capacity power model 6; 4 li, the first inverter power cabinet 2 and the second inverter power cabinet comprise respectively three groups of separate inverted power modules 7, on every group of inverted power module 7 with four IGCT devices.The overall dimensions of rectified power cabinet 1 be 2500 * 1000 * 1500(high * wide * dark, unit: mm).On depth direction, as Fig. 2, rectified power module 5 is positioned at forward position, rectified power cabinet 1 middle part, and the female pipe 8 in rectification module water route is positioned at rectified power cabinet 1 front portion, is connected with the rectification module water route vertical tube 9 in cabinet left side; As Fig. 3,12, three groups of rectifier cabinet direct current horizontal busbars 12 of three groups of rectifier cabinet direct current horizontal busbars are arranged in parallel in vertical direction at a certain distance, are positioned at the rear portion of rectified power cabinet 1.Simultaneously, comprise three rectification horizontal busbars 13 in every group of rectifier cabinet direct current horizontal busbar 12, three rectification horizontal busbars 13 also are arranged in parallel according to a determining deviation in vertical direction, are fixed on the rectified power cabinet 1 corresponding installing hole of cabinet by insulator 14 and direct current horizontal busbar support 15.The first inverter power cabinet 2 is identical with the version of the second inverter power cabinet 4, overall dimensions be 2500 * 1200 * 1500(high * wide * dark, unit: mm).On the depth direction of the first inverter power cabinet 2 and the second inverter power cabinet 4, the female pipe 18 in the inversion water route of inverted power module 7 and IGCT drive part 19 are positioned at the cabinet front portion, as Fig. 2; Inverted power module 7 and inversion direct current overlap joint busbar 20 exchange overlap joint busbar 21 and are positioned in the middle part of cabinet with inversion; The cabinet rear portion, the three groups of inverter cabinet direct current horizontal busbars 22 that have been arranged in parallel from top to bottom comprise the inversion horizontal busbar 23 of three in every group of inverter cabinet direct current horizontal busbar 22.Each inversion horizontal busbar 23 is arranged in parallel according to certain spacing in vertical direction, is fixed on by insulator 14 and direct current horizontal busbar support 15 on the corresponding installing hole of cabinet of the first inverter power cabinet 2 and the second inverter power cabinet 4.The overall dimensions of capacitor box 3 be 2500 * 1000 * 1500(high * wide * dark, unit: mm).On capacitor box 3 depth directions, the middle part is mainly electric capacity power model 5; Anterior except the vertical main 16 of confession/backwater that is used for the installation water-cooling system, also utilized limited space that precharge transformer 17 is installed.At capacitor box 3 rear portions, arranged three groups of capacitor box direct current horizontal busbars 24 that are arranged in parallel in vertical direction, comprised the electric capacity horizontal busbar 25 of three in every group of capacitor box direct current horizontal busbar 24.Electric capacity horizontal busbar 25 is arranged in parallel according to certain spacing in vertical direction, is fixed on the capacitor box 3 corresponding installing holes of cabinet by insulator 14 and direct current horizontal busbar support 15.The circuit of five level power cabinets connects, and is to be realized by the connection of overlap joint busbar 27 between cabinet each other with the inversion horizontal busbar 23 of being connected in inverter power cabinet 4 by the inversion horizontal busbar 23 in the rectification horizontal busbar 13 in rectified power cabinet 1, the first inverter power cabinet 2, electric capacity horizontal busbar 25 in capacitor box 3.Simultaneously, in order further to improve the power output of device, two cover five level power cabinets can be realized output in parallel by output transformer.As shown in Figure 4 and Figure 5, two cover five level power cabinets from left to right comprise successively: rectified power cabinet 1, the first inverter power cabinet 2, capacitor box 3, the second inverter power cabinet 4, outgoing line cabinet 28, the second inverter power cabinet 4, capacitor box 3 and the first inverter power cabinet 2.In two cover five level power cabinets, increased by one group of outgoing line cabinet, 28, two cover five level power cabinets and shared a rectified power cabinet 1.The employing of described rectified power cabinet 1 is chosen according to power capacity.In outgoing line cabinet 28 cabinets, the cabinet front portion is fixed with the external busbar 29 of interchange outlet of drawing from arranged on left and right sides inverter power cabinet and is convenient to output connection.Three groups of discharge power loops 30 are laid at cabinet middle part, connect respectively at three groups of outgoing line cabinet direct current horizontal busbars 31, are used for the discharge of electric capacity power model.Three groups of outgoing line cabinet direct current horizontal busbars 31 have been arranged at the cupboard rear portion.Three outlet horizontal busbars 32 have been comprised in every group of outgoing line cabinet direct current horizontal busbar 31.Horizontal busbar in three groups of direct current horizontal busbars 31 of outgoing line cabinet and other cabinets is identical.
Claims (8)
1. large capacity Five-level converter power cabinet, it is characterized in that: be followed successively by from left to right rectified power cabinet (1), the first inverter power cabinet (2), capacitor box (3) and the second inverter power cabinet (4), wherein, rectified power cabinet (1) is inner comprises three groups of separate rectified power modules (5), every group of rectified power module (5) is upper with some power electronic device, and the connection by the internal copper bus realizes direct current output; Capacitor box (3) is inner comprises three groups of separate electric capacity power models (6), on every group of electric capacity power model (6), some dc capacitors has been installed; The inner three groups of separate inverted power modules (7) that comprise respectively of the first inverter power cabinet (2) and the second inverter power cabinet (4), every group of inverted power module (7) is upper with four IGCT devices.
2. a kind of large capacity Five-level converter power cabinet according to claim 1, is characterized in that: in rectified power cabinet (1), be divided into from top to bottom three layers, arrange one group of rectified power module (5) for every layer; On depth direction, rectified power module (5) is positioned at forward position, rectified power cabinet (1) middle part, and the rectification module female pipe in water route (8) is positioned at the front portion; Side arrangement rectification water route vertical tube (9), corresponding with rectification module water route female pipe (8) interface of each rectified power module (5), interconnected by ball valve; The rear portion of rectified power cabinet (1) is rectification module alternating current bus bar (10) and rectification module DC master row (11); Simultaneously, three groups of rectifier cabinet direct current horizontal busbars (12) have been arranged at rectified power cabinet (1) rear portion, and three groups of rectifier cabinet direct current horizontal busbars (12) are arranged in parallel in vertical direction; Comprise three rectification horizontal busbars (13) in every group of rectifier cabinet direct current horizontal busbar (12), three rectification horizontal busbars (13) also are arranged in parallel in vertical direction, are fixed on the corresponding installing hole of rectified power cabinet (1) cabinet by insulator (14) and direct current horizontal busbar support (15).
3. a kind of large capacity Five-level converter power cabinet according to claim 1, it is characterized in that: rectification module DC master row (11) directly is connected with rectification horizontal busbar (13); Rectification module alternating current bus bar (10) is arranged in the position adjacent with rectification module DC master row (11) homonymy.
4. a kind of large capacity Five-level converter power cabinet according to claim 1, it is characterized in that: the first inverter power cabinet (2) is identical with the version of the second inverter power cabinet (4), take the first inverter power cabinet (2) as example, in cabinet, be divided into three layers from top to bottom, arrange one group of inverted power module (7) for every layer; On the depth direction, inverted power module (7) is placed on cabinet middle part, and inversion direct current overlap joint busbar (20) exchanges with inversion and overlaps busbar (21) and be positioned at the cabinet rear portion; The female pipe in the inversion water route of inverted power module (7) (18) and IGCT drive part (19) are positioned at the cabinet front portion; The cabinet rear portion three groups of inverter cabinet direct current horizontal busbars (22) that have been arranged in parallel from top to bottom comprise three inversion horizontal busbars (23) in every group of inverter cabinet direct current horizontal busbar (22); Each inversion horizontal busbar (23) is arranged in parallel in vertical direction, is fixed on the corresponding installing hole of inverter power cabinet cabinet by insulator (14) and direct current horizontal busbar support (15); The inversion direct current overlap joint busbar (20) of every group of inverted power module (7) is connected with corresponding inversion horizontal busbar (23).
5. a kind of large capacity Five-level converter power cabinet according to claim 1, is characterized in that: be divided into from top to bottom three layers in capacitor box (3), arrange one group of electric capacity power model (6) for every layer; Also arranged the vertical main of confession/backwater (16) of cooling water system in capacitor box (3); The vertical main of the confession/backwater of cooling water system (16) respectively with left side the first inverter power cabinet (2) and right side the second inverter power cabinet (4) in inverted power module (7) on inversion water route female pipe (18) interface corresponding, interconnected by ball valve; On capacitor box (3) depth direction; The middle part is electric capacity power model (6); The anterior vertical main of confession/backwater (16) and the precharge transformer (17) that water-cooling system is installed; Three groups of capacitor box direct current horizontal busbars (24) that are arranged in parallel have in vertical direction been arranged at the rear portion, have comprised the electric capacity horizontal busbar (25) more than three in every group of capacitor box direct current horizontal busbar (24); Electric capacity horizontal busbar (25) is arranged in parallel in vertical direction, is fixed on the corresponding installing hole of capacitor box (3) cabinet by insulator (14) and direct current horizontal busbar support (15); The external DC master row of electric capacity (26) of every group of electric capacity power model (6) is connected with corresponding electric capacity horizontal busbar (25), realizes electrical connection reliably.
6. large capacity Five-level converter power group is characterized in that: will overlap the Five-level converter power cabinet more and couple together use by overlapping busbar (27) between cabinet.
7. a kind of large capacity Five-level converter power group according to claim 6 is characterized in that: two cover Five-level converter power cabinets couple together use by overlapping busbar (27) between cabinet; Two cover Five-level converter power cabinets from left to right comprise successively: rectified power cabinet (1), the first inverter power cabinet (2), capacitor box (3), the second inverter power cabinet (4), outgoing line cabinet (28), the second inverter power cabinet (4), capacitor box (3) and the first inverter power cabinet (2), two cover Five-level converter power cabinets share a rectified power cabinet (1).
8. a kind of large capacity Five-level converter power group according to claim 7, it is characterized in that: described outgoing line cabinet (28) is divided into front portion, middle part and rear portion, and the second inverter power cabinet (4) exchanges external busbar (29) with the outlet that right side the second inverter power cabinet (4) is drawn to anterior layout from the left side; Discharge power loop (30) is arranged at the middle part; Three groups of outgoing line cabinet direct current horizontal busbars (31) are arranged at the rear portion; Three outlet horizontal busbars (32) have been comprised in every group of outgoing line cabinet direct current horizontal busbar (31).
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| CN201310117147.4A CN103178721B (en) | 2013-04-07 | 2013-04-07 | A kind of high-capacity five-level converter power cabinet |
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| CN201310117147.4A CN103178721B (en) | 2013-04-07 | 2013-04-07 | A kind of high-capacity five-level converter power cabinet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103532348A (en) * | 2013-10-22 | 2014-01-22 | 南车株洲电力机车研究所有限公司 | Functional unit cabinet of high-power semiconductor convertor |
| CN106602451A (en) * | 2016-06-27 | 2017-04-26 | 河南平芝高压开关有限公司 | Power cabinet |
| CN109742923A (en) * | 2018-12-10 | 2019-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of high-capacity power cabinet |
Families Citing this family (2)
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| CN106329975B (en) | 2015-07-10 | 2019-02-12 | 台达电子企业管理（上海）有限公司 | Five LCU level conversion units |
| CN106329974B (en) | 2015-07-10 | 2018-12-21 | 台达电子企业管理（上海）有限公司 | Five LCU level conversion units |
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| CN109742923B (en) * | 2018-12-10 | 2021-03-19 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Large-capacity power cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103178721B (en) | 2015-09-02 |
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