CN210958131U

CN210958131U - Power module and converter

Info

Publication number: CN210958131U
Application number: CN201922343868.2U
Authority: CN
Inventors: 袁小峰; 高保峰
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-07
Anticipated expiration: 2029-12-23

Abstract

The utility model provides a power module and converter. The power module includes: a support body including a bottom wall and a top wall opposite to each other, a first side wall and a second side wall connected to the bottom wall and the top wall and opposite to each other, and a rear wall connected to the bottom wall, the top wall, the first side wall, and the second side wall; an IGBT cell located on the bottom wall, an AC terminal of the IGBT cell being electrically connected to an AC row supported on the bottom wall; the laminated busbar is positioned on the bottom wall, and the direct-current positive terminal and the direct-current negative terminal of the IGBT unit are respectively and electrically connected to the laminated busbar; the capacitor bank is installed on the laminated busbar, at least the top wall covers the capacitor bank, the capacitor bank is connected to the top wall, and a first vent hole and a second vent hole are formed in the first side wall and the second side wall respectively. According to the utility model discloses, because power module installs in the support main part that seals relatively, so the cold air through the second ventilation hole can cool off electric capacity group effectively for electric capacity group's life extension.

Description

Power module and converter

Technical Field

The utility model relates to an automatically controlled field, in particular to power module and converter.

Background

The power module is used as a core device in the converter, and the performance of the power module directly determines the performance of the converter.

Fig. 1 is a perspective view of a conventional power module. As shown in fig. 1, the cooling plate 11 is located on the lower surface of an open support plate 12. The IGBT unit 13 is directly attached to the upper surface of the cooling plate 11, the ac terminal of the IGBT unit 13 is connected to the ac busbar 15 passing through the current sensor 14, and the dc terminal of the IGBT unit 13 is connected to the laminated busbar 10 provided with the capacitor bank 16. The top of the capacitor bank 16 is supported by a support plate 17 bolted to the support plate 12. The direct current positive electrode 19 and the direct current negative electrode 18 of the laminated busbar 10 are arranged on one side of the laminated busbar 10. The disadvantages of this structure are: the capacitor bank 16 requiring air cooling cannot obtain enough air volume; the folded flow guide part at the rear part of the laminated busbar 10 greatly increases the size of the whole laminated busbar 10; the cooling plate 11 and the joints mounted thereon are exposed to the outside and thus cannot be effectively protected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power module and converter that cooling efficiency improves to the electric capacity group of solving current power module fails by the abundant cooling and the technical problem that the life that leads to shortens.

According to the utility model provides a power module, power module includes: a support body including a bottom wall and a top wall opposite to each other, a first side wall and a second side wall connected to the bottom wall and the top wall and opposite to each other, and a rear wall connected to the bottom wall, the top wall, the first side wall, and the second side wall; an IGBT cell located on the bottom wall, an AC terminal of the IGBT cell being electrically connected to an AC row supported on the bottom wall; the laminated busbar is positioned on the bottom wall, and the direct-current positive terminal and the direct-current negative terminal of the IGBT unit are respectively and electrically connected to the laminated busbar; the capacitor bank is installed on the laminated busbar, wherein the top wall at least covers the capacitor bank, the capacitor bank is connected to the top wall, and a first vent hole and a second vent hole are formed in the first side wall and the second side wall respectively.

Optionally, the power module may further include a cooling plate located between the IGBT unit and the bottom wall, and the IGBT unit is attached to the cooling plate.

Optionally, the first vent hole may be sized to expose at least the capacitor pack; the second vent hole may be sized to expose the IGBT unit, the ac row, and the capacitor bank, and the power module may further include an air guide plate formed at a position of the second vent hole corresponding to the IGBT unit and the ac row, the air guide plate having a third vent hole formed thereon.

Alternatively, the power module may further include a control board receiving part formed of a carbon steel plate, installed between the first and second sidewalls, and located above the IGBT unit and the ac line, wherein a driving control board is installed in the control board receiving part.

Alternatively, the control board accommodation portion may include: a box part, the upper side of which is provided with an opening; a cover covering the opening.

Optionally, the laminated busbar may be plate-shaped, and a dc positive electrode and a dc negative electrode of the laminated busbar may be respectively located on two opposite sides of the laminated busbar and respectively close to the second sidewall and the first sidewall.

Optionally, the power module may further include a switching bar, the switching bar is disposed below the laminated busbar, and the dc positive electrode and the dc negative electrode are switched to any one of the two sides of the laminated busbar through the switching bar.

Optionally, the power module may further include an ac row support mounted on the bottom wall for supporting an ac row.

Alternatively, the ac row supporter may have a C-shape including a first horizontal portion mounted on the bottom wall, a vertical portion vertically extending upward from one side of the first horizontal portion, and a second horizontal portion horizontally extending from an upper side of the vertical portion toward the other side of the first horizontal portion; the alternating current bar is supported on the second horizontal part, and the current sensor sleeved on the alternating current bar is supported on the vertical part.

According to the utility model provides a converter, the converter includes at least two power module as above, two at least power module connect in parallel or series connection.

According to the utility model discloses, because power module installs in the support main part that seals relatively, so the cold air through the second ventilation hole can cool off electric capacity group effectively for electric capacity group's life extension. In addition, when the power module according to the present invention is vertically installed in the converter cabinet, since the portion of the second sidewall of the support main body other than the second vent hole is stably supported, the power module can be stably supported, thereby facilitating installation and maintenance. According to the utility model discloses a power module, because the IGBT unit is mainly through the cooling plate cooling with exchanging the row, still can be through the guide plate guide through the cooling of the small part cold air in second ventilation hole cold air cooling, so the IGBT unit is cooled off more effectively with exchanging the row. According to the utility model discloses, because the cooling plate is installed in the inside of supporting the main part, so can protect the cooling plate effectively and connect with the cooling plate is connected to prevent that cooling plate and joint from being damaged. According to the utility model discloses a power module, because female the arranging of stromatolite is platelike or forms according to the flat structure, so the female size of arranging of stromatolite is little, the material is few and easily processing. Additionally, according to the utility model discloses, because female direct current positive pole and the direct current negative pole of arranging of stromatolite are located the female both sides of arranging of stromatolite respectively, so ensure that direct current distributes more evenly, avoid the unilateral to be qualified for the next round of competitions and generate heat superimposed risk. According to the utility model discloses a power module because female row of stromatolite still includes the switching row to arbitrary side in switching the female both sides of arranging of stromatolite with positive and direct current negative pole, so improved the wiring convenience. According to the utility model discloses a power module, because drive control panel installs in sealed and by the control panel accommodation portion that the carbon steel sheet formed, so can reduce the electromagnetic interference that exchanges production such as row effectively to drive control panel's influence to improve system stability.

Drawings

Fig. 1 is a perspective view schematically showing a prior art power module;

fig. 2 is a perspective view schematically showing a power module according to an exemplary embodiment of the present invention, in which a control board accommodating portion is not shown;

fig. 3 is a diagram schematically illustrating a rear portion of a power module according to an exemplary embodiment of the present invention, wherein a rear wall and a top wall of a support body are not shown;

fig. 4 is a diagram schematically illustrating a side portion of a power module according to an exemplary embodiment of the present invention, wherein the support body is not illustrated;

fig. 5 is a view schematically showing the rear of a power module according to an exemplary embodiment of the present invention, mainly showing the connection structure of a patch panel;

fig. 6 is a diagram schematically illustrating a current transformer including a power module according to an exemplary embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the specification.

Fig. 2 is a perspective view schematically showing a power module according to an exemplary embodiment of the present invention, in which a control board accommodating portion is not shown; fig. 3 is a diagram schematically illustrating a rear portion of a power module according to an exemplary embodiment of the present invention, wherein a rear wall and a top wall of a support body are not shown; fig. 4 is a diagram schematically illustrating a side portion of a power module according to an exemplary embodiment of the present invention, wherein the support body is not illustrated; fig. 5 is a view schematically illustrating a rear portion of a power module according to an exemplary embodiment of the present invention, mainly illustrating a connection structure of a patch panel.

As shown in fig. 2 to 5, a power module 1000 according to an exemplary embodiment of the present invention includes: a support body 100 including a bottom wall 101 and a top wall 102 opposite to each other, a first side wall 103 and a second side wall 104 connected to the bottom wall 101 and the top wall 102 and opposite to each other, and a rear wall 105 connected to the bottom wall 101, the top wall 102, the first side wall 103, and the second side wall 104; an IGBT cell 300 located on the bottom wall 101, an alternating current terminal of the IGBT cell 300 being electrically connected to the alternating current bar 400 supported on the bottom wall 101; the laminated busbar 500 is positioned on the bottom wall 101, and the direct-current positive terminal and the direct-current negative terminal of the IGBT unit 300 are respectively and electrically connected to the laminated busbar 500; and a capacitor bank 600 mounted on the laminated busbar 500, wherein the top wall 102 at least covers the capacitor bank 600, and the capacitor bank 600 is connected to the top wall 102, wherein the first and

second sidewalls

103 and 104 are respectively formed with a first vent 1031 and a second vent 1041.

Alternatively, the support body 100 according to the present invention may have a substantially hexahedral shape with an open front side, for example, a rectangular parallelepiped shape, and the top wall 102 may cover the entire top of the hexahedron or only a portion of the top of the hexahedron.

Alternatively, the first vent 1031 may be formed by cutting out at least a portion of the first side wall 103, and sized to expose at least the capacitor pack 600. Similarly, the second ventilation hole 1041 may be formed by cutting out at least a portion of the second sidewall 104, sized to expose the IGBT-unit 300, the ac row 400, and the capacitor bank 600. Generally, the power module 1000 is vertically installed in the converter cabinet, and when the power module 1000 is cooled by cold air, the cold air is blown upward from the lower portion through the second vent hole 1041 toward the first vent hole 1031, thereby cooling the capacitor bank 600. Compared with the capacitor bank 16 of the prior art power module of fig. 1, according to the present invention, the capacitor bank 600 of the power module 1000 is installed in the relatively closed supporting body 100, so that the cold air passing through the second ventilation holes 1041 can effectively cool the capacitor bank 600, so that the service life of the capacitor bank 600 is prolonged. In addition, when the power module 1000 according to the present invention is vertically installed in the converter cabinet, since the portion of the second sidewall 104 of the support main 100 other than the second vent hole 1041 is stably supported, the power module 1000 can be stably supported, thereby facilitating installation and maintenance.

Optionally, the power module 1000 may further include a wind deflector 1042, and the wind deflector 1042 may be formed at a position of the second vent hole 1041 corresponding to the IGBT unit 300 and the ac bank 400 and may be mounted on the bottom wall 101. The air deflector 1042 is provided with a third vent hole, and most of the cold air passing through the second vent hole 1041 cools the capacitor bank 600, and at the same time, the air deflector 1042 can also guide a small part of the cold air passing through the second vent hole 1041 to blow to the IGBT unit 300 and the ac row 400, so as to cool the IGBT unit 300 and the ac row 400.

According to the utility model discloses a power module 1000 can still include cooling plate 200, and cooling plate 200 is located between IGBT unit 300 and diapire 101, and IGBT unit 300 pastes the dress on cooling plate 200. A liquid may flow through the cooling plate 200 to cool the IGBT cell 300. According to the present invention, since the cooling plate 200 is installed inside the support main body 100, the cooling plate 200 and the joint connected with the cooling plate 200 can be effectively protected to prevent the cooling plate 200 and the joint from being damaged.

The power module 1000 according to the present invention may further include an ac row support member 800, for example, as shown in fig. 2, the ac row support member 800 may be C-shaped and include a first horizontal portion installed on the bottom wall 101, a vertical portion vertically extending upward from one side of the first horizontal portion, and a second horizontal portion horizontally extending from an upper side of the vertical portion toward the other side of the first horizontal portion. The ac row 400 is supported on the second horizontal portion and the current sensor 900 fitted over the ac row 400 is supported on the vertical portion. According to the utility model discloses, exchange and arrange the usable insulating material of support piece 800 and form. Although the ac row support member 800 is illustrated as having a C-shape according to the exemplary embodiment, the present invention is not limited thereto, and the ac row support member 800 may have other shapes as long as it can stably support the ac row 400 and the current sensor 900.

Alternatively, the laminated busbar 500 may be in a plate shape or formed in a flat plate structure, and the dc positive electrode 510 and the dc negative electrode 520 of the laminated busbar 500 may be respectively located at two opposite sides of the laminated busbar 500, for example, as shown in fig. 5, at the left and right sides of the laminated busbar 500, and respectively close to the second sidewall 104 and the first sidewall 103 (as shown in fig. 2 and 3), so as to ensure that the dc current is distributed more uniformly, and avoid the risk of overlapping of heating of the single-side outgoing lines. Compared with the laminated busbar 10 of the power module of the prior art having the flow guide portion with the folded back portion of fig. 1, the laminated busbar 500 of the flat plate structure of the power module 1000 according to the present invention saves material, is easy to process, and has a reduced size.

Optionally, the power module 1000 may further include a switching bar 530, where the switching bar 530 is disposed below the laminated busbar 500, and extends from one side of the laminated busbar 500 to the other side, and is used for switching the dc positive electrode 510 and the dc negative electrode 520 to any one of two sides of the laminated busbar 500, for example, the right side in fig. 5, so as to facilitate wiring. Specifically, as shown in fig. 5, the dc positive electrode 510 is connected to one end of the transition row 530, and the other end of the transition row 530 is connected to the outlet row 340; the dc negative electrode 520 is connected to the outlet line row 330, and the

outlet line rows

330 and 340 are located on the same side (right side, see fig. 5) of the laminated busbar 500.

According to the present invention, the power module 1000 may further include a control panel accommodating part 700. The control board receiving part 700 may have a hermetic structure and may be formed of a carbon steel plate, may be installed between the first and

second sidewalls

103 and 104, and is located above the IGBT unit 300 and the ac row 400. The driving control board 710 for driving the respective components of the power module 1000 is installed in the control board accommodating part 700, and since the control board accommodating part 700 is sealed and formed of a carbon steel plate, it is possible to effectively reduce the influence of electromagnetic interference generated from the ac line bank 400 and the like on the driving control board 710, thereby improving system stability. Although it is mentioned above that the control board receiving part 700 may be formed of a carbon steel plate, the present invention is not limited thereto, and the control board receiving part 700 may be formed of other suitable materials as long as the driving control board 710 received therein can be prevented from being subjected to electromagnetic interference.

Alternatively, the control board receiving part 700 may include: a box portion 720 having an opening formed at an upper side thereof; and a cover 730 covering the opening. Although specific shapes of the box portion 720 and the cover portion 730 are shown in fig. 3 and 4, the shapes of the box portion 720 and the cover portion 730 are not limited as long as the drive control board 710 can be accommodated therein so as to be protected from electromagnetic interference. As shown in fig. 2 and 3, the top wall 102 may cover only a portion of the top of the support body 100 where the capacitor bank 600 is located, and the cover 730 covers the rest of the top of the support body 100.

Alternatively, the converter according to an exemplary embodiment may include N power modules 1000 connected in parallel, where N is a natural number greater than or equal to 2.

Specifically, the dc interface of the first power module 1000 and the dc interface of the nth power module 1000 are respectively connected to the system common dc row and fixed by a fastener, such as a bolt. The ac interface of the first power module 1000 and the ac interface of the nth power module 1000 are finally gathered together through an external parallel device, and the power supply and signal interface of the first power module 1000 and the power supply and signal interface of the nth power module 1000 are connected to a unified controller. The power module 1000 is integrally connected in parallel in the electric control cabinet by adopting a drawer type structure. Although the power modules 1000 are described above as being connected in parallel, the converter according to the exemplary embodiment of the present invention is not limited thereto, and in the converter, the power modules 1000 may also be connected in series.

According to the utility model discloses, because power module 1000 is installed in relative confined support main part 100, so the cold air through second through-holes 1041 can cool off electric capacity group 600 effectively for electric capacity group 600's life extension.

In addition, when the power module 1000 according to the present invention is vertically installed in the converter cabinet, since the portion of the second sidewall 104 of the support main 100 other than the second vent hole 1041 is stably supported, the power module 1000 can be stably supported, thereby facilitating installation and maintenance.

According to the power module 1000 of the present invention, since the IGBT unit 300 and the ac row 400 are mainly cooled by the cooling plate 200, and a small portion of the cooling air passing through the second ventilation holes 1041 can be guided by the air deflector 1042 to be cooled, the IGBT unit 300 and the ac row 400 are cooled more effectively.

According to the present invention, since the cooling plate 200 is installed inside the support main body 100, the cooling plate 200 and the joint connected with the cooling plate 200 can be effectively protected to prevent the cooling plate 200 and the joint from being damaged.

According to the utility model discloses a power module 1000, because female row 500 of stromatolite is platelike or forms according to the flat structure, so female row 500 of stromatolite size is little, the materials is few and easily processing. Additionally, according to the utility model discloses, because female row 500's of stromatolite direct current positive pole 510 and direct current negative pole 520 are located the female both sides of arranging 500 of stromatolite respectively, so ensure that direct current distributes more evenly, avoid the unilateral to be qualified for the next round of competitions and generate heat superimposed risk.

According to the utility model discloses a power module 1000, because female row 500 of stromatolite still includes switching row 530 to switching arbitrary side in the female row 500 both sides of stromatolite with positive direct current 510 and direct current negative pole 520, so improved the wiring convenience.

According to the utility model discloses a power module 1000, because drive control board 710 is installed in sealed and control panel accommodation portion 700 that is formed by the carbon steel board, so can reduce the electromagnetic interference that exchanges production such as row 400 effectively and to drive control board 710's influence to improve system stability.

Although exemplary embodiments of the present invention have been described above in detail, it should be understood by those skilled in the art that various modifications and changes may be made to the embodiments of the present invention without departing from the principles and spirit of the invention. It will be understood that modifications and variations will occur to those skilled in the art, which modifications and variations will still fall within the scope of the present invention as defined by the appended claims.

Claims

1. A power module, characterized in that the power module (1000) comprises:

a support body (100) comprising a bottom wall (101) and a top wall (102) opposite each other, a first side wall (103) and a second side wall (104) connected to the bottom wall (101) and the top wall (102) and opposite each other, and a rear wall (105) connected to the bottom wall (101), the top wall (102), the first side wall (103) and the second side wall (104);

an IGBT cell (300) located on the bottom wall (101), an alternating current terminal of the IGBT cell (300) being electrically connected to an alternating current bank (400) supported on the bottom wall (101);

a laminated busbar (500) located on the bottom wall (101), wherein a direct current positive terminal and a direct current negative terminal of the IGBT unit (300) are respectively electrically connected to the laminated busbar (500);

a capacitor bank (600) mounted on the laminated busbar (500), wherein the top wall (102) covers at least the capacitor bank (600) and the capacitor bank (600) is connected to the top wall (102),

wherein a first vent hole (1031) and a second vent hole (1041) are formed on the first side wall (103) and the second side wall (104), respectively.

2. The power module of claim 1, wherein the power module (1000) further comprises:

a cooling plate (200) located between the IGBT unit (300) and the bottom wall (101), the IGBT unit (300) being attached to the cooling plate (200).

3. A power module according to claim 1, characterized in that the first vent hole (1031) is sized to expose at least the capacitor bank (600); the size of the second vent hole (1041) is formed to expose the IGBT unit (300), the ac busbar (400) and the capacitor bank (600), the power module (1000) further includes an air deflector (1042), the air deflector (1042) is formed at a position of the second vent hole (1041) corresponding to the IGBT unit (300) and the ac busbar (400), and a third vent hole is formed in the air deflector (1042).

4. The power module of claim 1, wherein the power module (1000) further comprises:

a control board accommodating part (700) formed of a carbon steel plate, installed between the first sidewall (103) and the second sidewall (104), and located above the IGBT unit (300) and the AC row (400), wherein a driving control board (710) is installed in the control board accommodating part (700).

5. The power module according to claim 4, wherein the control board accommodating part (700) includes:

a box part (720) with an opening formed on the upper side;

a cover (730) covering the opening.

6. The power module according to claim 1, wherein the laminated busbar (500) is plate-shaped, and a direct current positive electrode (510) and a direct current negative electrode (520) of the laminated busbar (500) are respectively located at two opposite sides of the laminated busbar (500) and respectively close to the second side wall (104) and the first side wall (103).

7. The power module of claim 6, wherein the power module (1000) further comprises:

the switching bar (530) is arranged below the laminated busbar (500), and the direct current positive electrode (510) and the direct current negative electrode (520) are switched to any one of the two sides of the laminated busbar (500) through the switching bar (530).

8. The power module of claim 1, wherein the power module (1000) further comprises:

an AC row support (800) mounted on the bottom wall (101) for supporting an AC row (400).

9. The power module according to claim 8, wherein the ac row supporter (800) has a C-shape including a first horizontal portion mounted on the bottom wall (101), a vertical portion vertically extending upward from one side of the first horizontal portion, and a second horizontal portion horizontally extending from an upper side of the vertical portion toward the other side of the first horizontal portion; the alternating current row (400) is supported on the second horizontal portion, and the current sensor (900) sleeved on the alternating current row (400) is supported on the vertical portion.

10. A current transformer, characterized in that the current transformer comprises:

at least two power modules (1000) according to any of claims 1-9, the at least two power modules (1000) being connected in parallel or in series.