CN214256143U - Stack module, power assembly and converter device - Google Patents

Abstract

The utility model discloses a fold row module, power component and deflector, it is used for electric capacity module and power switch module electrical coupling and include to fold row module: a first stacking unit and a second stacking unit; the first stacking unit is used for bearing a capacitor module; the second stacking unit is used for bearing the power switch modules and establishing an electrical connection relation with the first stacking unit so as to enable each power switch unit to be electrically coupled with the capacitor module; the second stacking unit is configured to enable all the power switch units to be located on the same plane after being carried. The utility model discloses a fold row module and be suitable for the radiator utilization ratio in electric capacity utilization ratio in the improvement power component and the deflector to reduce power component's volume and improve deflector's power density and heat-sinking capability.

Description

Stack module, power assembly and converter device

Technical Field

The utility model relates to a conversion technology field, more specifically say, relate to a fold row module, power component and conversion equipment.

Background

The converter comprises a power assembly, and modules contained in the power assembly are electrically coupled with each other to realize power conversion. In converters involving ac-dc conversion, the power assembly generally comprises a power switch module, a capacitor module and a corresponding electrical connection module; the power switches included in the power switch module are electrically coupled with each other to form a power topology so as to realize a corresponding current transformation function, the capacitor module is electrically coupled with the input end or the output end of the power switch module to form a direct current bus, and the electric connection module is used for establishing a corresponding electric connection relationship between the capacitor module and the power switch module.

With the continuous improvement of the power grade of the converter, the number of corresponding devices in the power assembly is increased, the size of the power assembly is increased, and the conventional layout of the power assembly is difficult to meet multiple electrical indexes at the same time, which puts forward higher requirements on the design of the power assembly.

Taking an inverter for realizing DC/AC conversion as an example, the conventional configuration of the power assembly comprises: the three-phase alternating current power supply comprises three power switch units respectively used for outputting three-phase alternating current, three capacitor units corresponding to the power switch units one by one and three stacked rows. Each power switch unit comprises a plurality of power switch groups (simplest power topology) which are connected in parallel to improve power, each power switch group comprises a plurality of power switches which are electrically coupled to form the simplest power topology, and the power switches can adopt power tubes such as IGBTs; the three capacitor units are respectively used for inputting direct current to the corresponding power switch units; the three laminated busbars are arranged in parallel at intervals and are respectively used for bearing a group of corresponding power switch units and capacitor units so as to establish an electrical connection relationship between the power switch units and the capacitor units.

In practical use, because the output three-phase alternating current has a phase difference, the utilization rate of the capacitor modules corresponding to the three power switch units is low, the capacitors are wasted, and the size of the power assembly is increased. In addition, because each laminated busbar is arranged in parallel and at intervals, the three power switch units are also in parallel and at intervals after being borne by the corresponding laminated busbar, so that three parallel and spaced radiators are required to be arranged, the radiators are not fully utilized, and the heat pipes are further arranged on the radiators to improve the heat dissipation capacity when higher heat dissipation requirements are met.

Moreover, the temperature and current of the three power switch units, the temperature and current of each power switch group in each power switch unit, and the layout of the heat dissipation air duct in the converter are factors to be taken into consideration when the configuration of the power assembly is changed. Therefore, it is extremely difficult to reasonably arrange the power components so that the power components can meet other electrical indexes as much as possible on the basis of improving the utilization rate of the capacitor, and the problem to be solved by the scheme is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fold row module, power component and deflector, it is suitable for the electric capacity utilization ratio in the improvement power component and the heat sink utilization ratio in the deflector to fold row module to reduce power component's volume and improve deflector's power density and heat-sinking capability.

To achieve the above object, a first aspect of the present invention provides a technical solution: a stacked module for electrically coupling a capacitive module and a power switch module; the capacitance module comprises a plurality of capacitors; the power switch module comprises three power switch units respectively corresponding to three-phase alternating current, and each power switch unit comprises a plurality of power switches which are electrically coupled with each other to realize current transformation; it includes: a first row-stacking unit for carrying the capacitor module; a second row-on-row unit for carrying the power switch module; the power switch unit is also electrically connected with the first stacking unit, and is configured to enable each power switch unit to be carried behind the power switch unit and to be located on the same plane and electrically coupled with the capacitor module.

In the first technical solution, the stacking module includes a first stacking unit and a second stacking unit, which respectively carry the capacitor module and the power switch module and are electrically connected to each other, and the second stacking unit is configured to electrically couple each power switch unit with the capacitor module and to locate each power switch unit on the same plane. Therefore, the three power switch units can share the same capacitor module and the same radiator, so that the three power switch units are suitable for simultaneously improving the utilization rate of the capacitor and the utilization rate of the radiator, thereby reducing the volume of the power assembly and improving the power density and the heat dissipation capacity of the converter.

Based on technical scheme one, the utility model discloses technical scheme two still has: the first row stacking unit and the second row stacking unit are vertically arranged and matched with each other so that the row stacking module is in an L-shaped structure extending along a first direction; the first stacking unit and the second stacking unit are arranged in parallel to the first direction; the capacitor module and the power switch module are respectively arranged on the outer sides of the corresponding row stacking units.

In the second technical solution, the first stacking unit and the second stacking unit are matched with each other and form an L-shaped structure extending along the first direction, so that each power switch unit and each power switch group included in the power switch unit can be arranged on the second stacking unit at intervals along the first direction. On one hand, each power switch unit is equidistant to the capacitor modules arranged in the first stacked unit, so that the current sharing of each power switch unit is facilitated; on the other hand, the heat dissipation air duct of the power switch module can also be constructed to supply air perpendicular to the first direction, so that the temperature equalization of each power switch unit and each power switch group is facilitated.

On this basis, because two pile row units are perpendicular to each other and capacitor module and power switch module locate respectively and correspond to pile the outside of arranging the unit, therefore capacitor module can not be in power switch module's heat dissipation wind channel, just can not block that cold wind air current dispels the heat or receive the influence of hot-blast air current to lead to self to be difficult to dispel the heat to power switch module yet. In other words, the second technical solution is suitable for ensuring that the heat dissipation air ducts of the capacitor module and the power switch module do not interfere with each other under the conditions that the power switch units are suitable for realizing temperature equalization and current equalization and the power switch groups are also in temperature equalization.

Based on technical scheme two, the utility model discloses technical scheme three still has: the stacking module is configured into a first stacking row which is L-shaped and has a bending structure; two parts perpendicular to each other on the first stacking row respectively form the first stacking row unit and the second stacking row unit.

The third technical proposal is that the stacking module is a first stacking module which is L-shaped and has a bending structure. In other words, the first stacking unit and the second stacking unit which are respectively used for bearing the capacitor module and each power switch module are defined by bending the integrated stacking line, so that the capacitor module and each power switch module are naturally electrically connected due to bearing on the same stacking line, and on the basis that each power switch group in each power switch module is also arranged at intervals along the first direction, the overcurrent paths before current flows into each power switch group extend perpendicular to the first direction, so that the impedances of the overcurrent paths are completely the same, and the current equalization of each power switch group in each power switch module can be naturally realized.

Based on technical scheme three, the utility model discloses technical scheme four still has: two notches extending perpendicular to the first direction are formed in the end, away from the first stacking unit, of the part, forming the second stacking unit, of the first stacking unit, and both the notches extend to the connecting position of the first stacking unit and the second stacking unit; the two notches are arranged at intervals along the first direction so as to define three power switch bearing areas spaced along the first direction for the second row stacking unit; each power switch unit is respectively arranged in one power switch bearing area.

According to the fourth technical scheme, two notches are formed in the portion forming the second row stacking unit, and the two notches define three power switch bearing areas which are completely spaced along the first direction for the second row stacking unit. In other words, although the power switch carrying areas of the second row stacking unit are separated, each power switch carrying area is integrated with the first row stacking unit. Therefore, after each power switch unit is carried in the corresponding power switch carrying area, even if the height of each power switch is different due to the fact that the surface of the radiator is not flat enough, the problem that the integrated stacked row is damaged under large stress due to the fact that the size of the integrated stacked row is too long along the first direction after assembly can be improved to a large extent, and the stacked row module is still of an integrated structure, so that the integrated stacked row module is still suitable for achieving current sharing of each power switch group.

Based on technical scheme two, the utility model discloses technical scheme five still has: the row-on-row module is configured to include a first row-on-row and three second row-on-row, each in a planar configuration; the first stacking line constitutes the first stacking line unit; all the second stacked rows are located on the same plane and arranged at intervals along the first direction; each second stacking row is also lapped with the first stacking row and is respectively used for bearing one power switch unit, and the second stacking rows are jointly formed into the second stacking row unit.

The row-stacking module in the fifth technical scheme is of a split structure and is formed by correspondingly overlapping four stacked rows of plane structures, and each second stacked row is used for bearing a power switch unit. The stress problem caused by the fact that the surface of the radiator is not flat enough can be improved, the stress problem caused after assembly due to the error of the bending angle when the integrated laminated row is bent can be improved, and the condition that the laminated row is damaged in the operation process of the converter is effectively prevented.

Based on technical scheme five, the utility model discloses technical scheme six still has: the first laminated row comprises a plurality of first sub-busbars which are insulated from each other and are arranged in a laminated manner, and each second laminated row comprises a plurality of second sub-busbars which are insulated from each other and are arranged in a laminated manner and are the same in number as the first sub-busbars; and each second sub-busbar of each second stacked row is correspondingly lapped with one first sub-busbar of the first stacked row, so that each second stacked row is lapped with the first stacked row and establishes an electrical connection relation.

In the sixth technical scheme, the second sub-busbars included in the second stacked rows and the first sub-busbars included in the first stacked rows are in the same number and are correspondingly lapped, so that the capacitor module and each power switch unit can be electrically coupled, and the capacitor module can be shared by the power switch modules when the stacked row module is in a split structure.

In order to achieve the above object, a second aspect of the present invention provides: a power assembly, comprising: a row-by-row module as set forth in any one of claims one-five; the capacitor module comprises a plurality of capacitors and is loaded on the first stacking unit; a power switch module including three power switch units respectively corresponding to three-phase alternating current, each power switch unit including a plurality of power switches electrically coupled to each other; the power switch module is carried on the second row-overlapping unit.

The power assembly in the seventh technical scheme inherits all advantages due to the arrangement of the stacked modules, has high capacitance utilization rate and radiator utilization rate, has small volume and is suitable for improving the power density and the heat dissipation capacity of the converter device.

Based on technical scheme seven, the utility model discloses technical scheme eight still has: the first row stacking unit and the second row stacking unit are vertically arranged and matched with each other to enable the row stacking module to be in an L-shaped structure extending along a first direction, and the first row stacking unit and the second row stacking unit are arranged in parallel to the first direction; the capacitor module and the power switch module are respectively arranged at the outer sides of the corresponding stacked units, and the power switch units are arranged at intervals along the first direction; each power switch unit comprises a plurality of power switch groups which are connected in parallel and arranged at intervals along the first direction, and each power switch group comprises a plurality of power switches which are electrically coupled with each other to realize current transformation.

The power assembly of the second technical scheme further defines that the stacked module is a stacked module of the second technical scheme, and therefore, the power switch units and the power switch groups included in the power switch units are arranged at intervals along the first direction, so that the power switch units are enabled to be at the same temperature and flow, the power switch groups are also at the same temperature, and the power switch units are suitable for being configured with an integral stacked structure to achieve flow equalization of the power switch groups.

In order to achieve the above object, a third aspect of the present invention provides a technical solution nine: a converter comprising a power assembly as described in claim seven or eight; a heat sink for dissipating heat for the three power switch units of the power switch module.

The converter device in the ninth technical scheme inherits all advantages due to the fact that the converter device is provided with the power assembly, and has high capacitance utilization rate and high radiator utilization rate, so that the converter device has high power density and is suitable for improving heat dissipation capacity by arranging the heat pipe.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a perspective view of a deflector according to embodiment 1 of the present invention;

fig. 2 is a side view of a deflector according to embodiment 1 of the present invention;

fig. 3 is a perspective view of the power module according to embodiment 1 of the present invention;

fig. 4 is another perspective view of the power module according to embodiment 1 of the present invention;

fig. 5 is a side view of a power module according to embodiment 1 of the present invention;

fig. 6 is a perspective view of a row-stacking module according to embodiment 1 of the present invention;

fig. 7 is a perspective view of the row-stacking module according to embodiment 1 of the present invention after an insulating layer is hidden;

fig. 8 is an exploded view of each first sub bus bar of the row stacking module according to embodiment 1 of the present invention;

fig. 9 is a perspective view of a deflector according to embodiment 2 of the present invention;

fig. 10 is a side view of a deflector according to embodiment 2 of the present invention;

fig. 11 is a perspective view of the power module according to embodiment 2 of the present invention;

fig. 12 is another perspective view of the power module according to embodiment 2 of the present invention;

fig. 13 is a side view of a power module according to embodiment 2 of the present invention;

fig. 14 is a perspective view of a row stacking module according to embodiment 2 of the present invention;

fig. 15 is a perspective view of the row-stacking module according to embodiment 2 of the present invention after an insulating layer is hidden;

fig. 16 is an exploded view of the row-stacked module according to embodiment 2 of the present invention after the insulating layer is hidden;

fig. 17 is a perspective view of a deflector according to embodiment 3 of the present invention;

fig. 18 is a perspective view of the power module according to embodiment 3 of the present invention;

fig. 19 is another perspective view of the power module according to embodiment 3 of the present invention;

fig. 20 is a side view of a power module according to embodiment 3 of the present invention;

fig. 21 is a perspective view of a row stacking module according to embodiment 3 of the present invention;

fig. 22 is a perspective view of the multi-row module according to embodiment 3 of the present invention with the insulating layer hidden.

The main reference numbers:

a deflector 1000;

the power component 100, the radiator 200, the direct current input copper bar 310 and the alternating current output copper bar 320;

a capacitive module 110;

a power switch unit 121, a power switch group 1211, a first power switch 1211A, a second power switch 1211B, a driving unit 122, a driving substrate 1221 and a driving device 1222;

the power switch module comprises a stacking module 130, a first stacking unit 130A, a second stacking unit 130B, a first stacking line 131A (131B), a first primary-secondary line 1311A (1311B), a second stacking line 132, a second primary-secondary line 1321, a notch 133 and a power switch carrying area 134.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are preferred embodiments of the invention and should not be considered as excluding other embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

In the claims, the specification and the drawings, unless otherwise expressly limited, the terms "first," "second," or "third," etc. are used for distinguishing between different elements and not for describing a particular sequence.

In the claims, the specification and the drawings, unless otherwise expressly limited, to the extent that directional terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise" and the like are used, the positional or orientational relationships illustrated in the drawings are based on the positional and orientational relationships illustrated in the drawings and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention in any way.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the term "fixedly connected" or "fixedly connected" is used, which is to be understood broadly, that is, any connection mode without displacement relation or relative rotation relation between the two, that is, including non-detachably fixed connection, and fixed connection through other devices or elements.

Example 1

Referring initially to fig. 1-2 and to the directional reference shown in fig. 1, embodiment 1 of the present invention provides a converter 1000, which is exemplarily configured as an inverter and includes a cabinet (not shown), and a power assembly 100, a heat sink 200, a fan (not shown) and a lead copper bar located in the cabinet.

Referring to fig. 3-5, the power assembly 100 is an inverting power assembly that includes a capacitance module 110, a power switch module, and a bank module 130.

The capacitor module 110 includes a plurality of capacitors, which are connected to a dc power and form a dc bus.

The power switch module is configured as an inverter power module that switches in direct current and outputs three-phase alternating current through DC/AC conversion, and thus, the power switch module includes three power switch units 121 respectively corresponding to the three-phase alternating current, and each of the power switch units 121 includes a plurality of power switches electrically coupled to each other to achieve DC/AC conversion.

The bank stacking module 130 is formed by a bank stacking bus for electrically coupling the capacitor module 110 and the power switch module, and includes a first bank stacking unit 130A and a second bank stacking unit 130B electrically connected to each other and respectively carrying the capacitor module 110 and the power switch module. The second stacking unit 130B is electrically connected to the first stacking unit 130A, and is configured such that each power switch unit 121 is carried behind and located on the same plane, and electrically coupled to the capacitor module 110.

It is worth mentioning that the present invention, bearing, means that the device and the plate naturally establish an electrical connection relationship when establishing a mechanical fastening relationship. The electrical coupling of the present invention does not merely mean that each device or module is simply electrically connected, but means that each device or module establishes an electrical connection relationship according to a circuit topology and implements a corresponding circuit function.

The heat sink 200 is an integrated heat sink, and since each power switch unit 121 is located on the same plane after being carried on the second row-stacked unit 130B, the heat dissipation substrate of the heat sink 200 can be fixedly connected to each power switch of the three power switch units 121 at the same time and establish a heat conduction relationship, so as to dissipate heat for each power switch unit 121 at the same time. It goes without saying that a plurality of air gaps are formed between a plurality of heat dissipation teeth of the heat sink 200 to allow the air flow to pass through the air gaps and to perform the heat convection with the heat dissipation teeth. In this embodiment, the heat dissipation substrate is disposed perpendicular to the second direction of the figure, and each of the air gaps extends along the third direction of the figure.

The fan (not shown) supplies air in the extending direction (third direction) of the air gaps, so that the supply air flow passes through each air gap to cool the heat sink 200 and the power switch module.

The lead copper bar comprises two direct current input copper bars 310 and three alternating current output copper bars 320, wherein the two direct current input copper bars 310 correspond to positive direct current and negative direct current respectively and are connected with the first row stacking unit 130A to input direct current to the first row stacking unit 130A, and the three alternating current output copper bars 320 correspond to three-phase alternating current output respectively and are connected with three output ends of the power switch units 121 to lead out three-phase alternating current.

It can be seen that the stacked module 130 includes two first stacked units 130A and two second stacked units 130B, which respectively carry the capacitor module 110 and the power switch module and are electrically connected to each other, and the second stacked unit 130B is configured such that not only each power switch unit 121 is electrically coupled to the capacitor module 110, but also each power switch unit 121 is located on the same plane. Therefore, the three power switch units 121 can share not only the same capacitor module 110 but also the same heat sink, so that the power assembly has higher capacitance utilization rate and heat sink utilization rate, thereby reducing the volume of the power assembly and improving the power density of the converter, and the converter is also suitable for improving the overall heat dissipation capacity by arranging a heat pipe on the heat sink.

The specific configuration of the stacking module 130 and the power module 100 of the present embodiment will be described in detail below to better show the advantages of the present embodiment.

Referring to fig. 6 to 8, in the present embodiment, the row stacking module 130 is configured as a first row stack 131A having an L-shape and a bent configuration, and two portions of the first row stack 131A perpendicular to each other respectively form the first row stack unit 130A and the second row stack unit 130B. In other words, the first stacking unit 130A and the second stacking unit 130B are disposed perpendicular to each other and cooperate with each other to make the stacking module 130 have an L-shaped configuration extending along a first direction shown in the figure, and the first stacking unit 130A and the second stacking unit 130B are both disposed parallel to the first direction.

In a specific structure, the first stacked row 131A of this embodiment is composed of a plurality of first sub-rows 1311A that are insulated from each other and stacked, and each of the first sub-rows 1311A corresponds to a different potential and is insulated from each other by an insulating layer, which may be a PET insulating film. In this embodiment, each power switch unit 121 is a three-level power topology, so the first stacked row 131A includes three first primary-secondary rows 1311A, where the three first primary-secondary rows 1311A correspond to a positive electrode, a neutral electrode, and a negative electrode, respectively, one end of each of the two dc input copper bars 310 is connected to a positive dc power and a negative dc power, and the other end of each of the two dc input copper bars is connected to the corresponding positive electrode and negative primary-secondary rows 1311A in a lap joint manner.

Based on the above configuration of the bank module 130, the capacitor module 110 and the power switch module of the present embodiment are respectively provided outside the first bank unit 130A and the second bank unit 130B. And further, three power switch units 121 are arranged at intervals along the first direction, each power switch unit 121 includes three power switch groups 1211 connected in parallel and also arranged at intervals along the first direction, each power switch group 1211 includes a first power switch 1211A and a second power switch 1211B which are electrically coupled to each other to form a minimum power topology and realize DC/AC conversion, and the first power switch 1211A and the second power switch 1211B are both IGBT tubes.

Therefore, in the power assembly 100 and the inverter 1000 of the embodiment, the three power switch units 121 include the power switch groups 1211 that are arranged at intervals along the first direction, and the fan blows air along a third direction perpendicular to the first direction, so that the power switch units 121 and the power switch groups 1211 can achieve uniform temperature. In addition, since the three power switch units 121 are arranged at intervals along the first direction, they are equidistant from the capacitor modules 110 disposed in the first row stacking unit 130A, so that the three power switch units 121 can equalize current.

In addition, because the two stacked units are perpendicular to each other and the capacitor module 110 and the power switch module are respectively arranged at the outer sides of the corresponding stacked units, the capacitor module 110 is not in the heat dissipation air duct of the power switch module, and cold air flow cannot be blocked to dissipate heat of the power switch module or cannot be affected by the hot air flow to cause difficulty in heat dissipation. The power assembly of this embodiment not only can achieve temperature equalization and current equalization of the power switch units 121, but also can achieve temperature equalization of the power switch groups 1211, and can ensure that the heat dissipation air channels of the capacitor module 110 and the power switch module do not interfere with each other.

Further, since the stacking module 130 of the present embodiment is an integral stacking module, and the first stacking unit 130A and the second stacking unit 130B for respectively carrying the capacitor module 110 and each power switch module are defined by bending the integral stacking module, so that the capacitor module 110 and each power switch module naturally establish an electrical connection relationship due to being carried in the same stacking module, on the basis that the power switch groups 1211 in each power switch module are also arranged at intervals along the first direction, the overcurrent paths before the current flows into the power switch groups 1211 are all extended perpendicular to the first direction, so that the impedances of the overcurrent paths are completely the same, and thus the current equalization of the power switch groups 1211 in each power switch module is naturally achieved.

With continued reference to fig. 3-5, since the power switches also need to be driven to be turned on and off, the power switches in each power switch group 1211 are configured as follows. In this embodiment, the first power switches 1211A of each power switch group 1211 are disposed at intervals along the first direction, the second power switches 1211B of each power switch group 1211 are also disposed at intervals along the first direction, and the first power switches 1211A and the second power switches 1211B of each power switch group 1211 are disposed at intervals along the third direction shown in the figure. In other words, each power switch is disposed along the third direction, and therefore the driving end thereof is also disposed toward the third direction, and in the orientation shown in fig. 4, the driving end of each first power switch 1211A faces downward, and the driving end of each second power switch 1211B faces upward.

Correspondingly, the power switch module further includes several driving units 122 for driving the power switches, and the driving unit 122 includes a driving substrate 1221 and a driving device 1222. The driving substrate 1221 is disposed corresponding to the driving end of each power switch and is parallel to the second row-stacked unit 130B, and the driving device 1222 is disposed on a side of the driving substrate 1221 away from the second row-stacked unit 130B.

In this embodiment, the power switch module includes six driving units 122, each power switch unit 121 corresponds to two driving units 122, one driving unit 122 is used for driving three first power switches 1211A of each power switch group 1211, and the other driving unit 122 is used for driving three second power switches 1211B of each power switch group 1211, so that the two driving units 122 corresponding to each power switch unit 121 are also arranged at intervals along the third direction, and one driving unit 122 is located below the corresponding power switch unit 121, and the other driving unit 122 is located above the corresponding power switch unit 121.

It can be seen that, since the driving device 1222 is disposed on a side of the driving substrate 1221 facing away from the second stacking unit 130B, the driving unit 122 driving each first power switch 1211A does not interfere with the second stacking unit 130B, and therefore, it is not required to be disposed below the first stacking unit 130A so as to be offset from the second stacking unit 130B. Therefore, a certain distance D is reserved from the connection point of the first row stacking unit 130A and the second row stacking unit 130B to the connection point of the second row stacking unit 130B and each power switch, so that the row stacking module 130 has a certain overcurrent section and can maintain a good current-carrying capacity, and a key role is played in the specific implementation of a power assembly capable of realizing the temperature and current equalization of each power switch on the basis of sharing a capacitor and a radiator.

Example 2

Referring to fig. 9 to 16, embodiment 2 of the present invention is a variation of embodiment 1, and provides a deflector 1000, and the configuration is substantially the same as that of embodiment 1, except that only the specific structure of the row-stacking module 130 is provided, so that the present embodiment does not describe the same parts of the two embodiments again, and only describes the differences and corresponding effects of the two on the specific structure of the row-stacking module 130, and those skilled in the art can fully understand the present embodiment by referring to embodiment 1 according to the same reference numerals in the corresponding drawings.

Specifically, referring particularly to fig. 14-16, the stacked row module 130 of the present embodiment includes a first stacked row 131B and three second stacked rows 132, each in a planar configuration. The first stacking row 131B of this embodiment directly constitutes the first stacking row unit 130A of embodiment 1, the three second stacking rows 132 are all located on the same plane and are arranged at intervals along the first direction, and each of the second stacking rows 132 is also overlapped with the first stacking row 131B and is respectively used for carrying one power switch unit 121, and together constitutes the second stacking row unit 130B of embodiment 1.

In other words, the stacking module 130 of the present embodiment adopts a split structure, which is formed by correspondingly overlapping four stacking rows of a planar structure, and each second stacking row 132 is used for carrying one power switch unit 121. In this way, after each power switch unit 121 is carried on the corresponding second stacked row 132, even if the heights of the power switches are different due to the uneven surface of the heat sink 200, the problem that the integrated stacked row is damaged under a large stress due to the overlong size of the integrated stacked row along the first direction after assembly can be solved to a large extent. Moreover, the row-stacking module 130 of the embodiment can also solve the problem of stress generated after assembly due to the error of the bending angle when the integral type row-stacking is bent, and effectively prevents the situation that the row-stacking damage occurs in the operation process of the converter.

Specifically, the first stacked row 131B in this embodiment includes three first sub-rows 1311B insulated from each other and stacked, each second stacked row 132 includes three second sub-rows 1321 insulated from each other and stacked, and each second sub-row 1321 of each second stacked row 132 is correspondingly overlapped with one first sub-row 1311B of the first stacked row 131B in this embodiment, so that each second stacked row 132 is overlapped with the first stacked row 131B and establishes an electrical connection relationship. It should be understood that the three first primary-secondary rows 1311B and the corresponding lapped second primary-secondary rows 1321 correspond to a positive pole, a neutral pole and a negative pole, respectively, so that the capacitor module 110 and each power switch unit 121 can be electrically coupled, and it is ensured that the capacitor module 110 can still be shared by the power switch modules when the row-stacked module 130 adopts a split structure.

However, it can be seen that, since the thickness of the sub-bus bar is limited, a certain distance exists between a junction point of each second sub-bus bar 1321 and the first sub-bus bar 1311B and a connection point of each first power switch 1211A of different power switch groups 1211 on the second sub-bus bar 1321 in the first direction, so that overcurrent paths of currents flowing into the power switch groups 1211 are inconsistent, that is, an overcurrent path of a power switch close to the junction point is shorter, and an overcurrent path of a power switch far away from the junction point is longer. In other words, although the stress problem can be solved well, the current sharing of the power switch sets 1211 in each power switch module cannot be realized.

Example 3

Referring to fig. 17 to 22, embodiment 3 of the present invention is a variation of embodiment 1, and also provides a converter 1000, and the configuration is substantially the same as embodiments 1 and 2, except that only the specific structure of the stacking module 130 is provided, so that the present embodiment does not describe the same parts of the three embodiments again, and only describes the differences and corresponding effects of the three embodiments on the specific structure of the stacking module 130, and those skilled in the art can fully understand the present embodiment by referring to embodiment 1 according to the same reference numerals in the corresponding drawings.

Referring to fig. 21 to 22 in particular, the stacking module 130 of the present embodiment is provided with a notch 133 on a portion constituting the second stacking unit 130B on the basis that the stacking module of embodiment 1 is configured as an integral stacking.

Specifically, in the first stacked row 131A of embodiment 1, the portion of the second stacked row unit 130B is provided with two cutouts 133 extending perpendicular to the first direction from the end thereof away from the first stacked row unit 130A, and both the cutouts 133 extend to the connection between the first stacked row unit 130A and the second stacked row unit 130B. The two cutouts 133 are disposed at intervals along the first direction to define three power switch carrying areas 134 spaced along the first direction for the second stacking unit 130B, and the three power switch units 121 are disposed in one of the power switch carrying areas 134, respectively.

In this embodiment, although the power switch carrying areas 134 of the second row stacking unit 130B are separated, each power switch carrying area 134 is integrated with the first row stacking unit 130A. Therefore, after each power switch unit 121 is carried in the corresponding power switch carrying area 134, even if the heights of the power switches are different due to the uneven surface of the heat sink 200, the problem that the integrated stacked array is damaged under a large stress due to the overlong size of the stacked array module 130 in the first direction after assembly can be greatly improved, and the stacked array module 130 is still of an integrated structure, so that the current sharing of each power switch 1211 is still suitable.

In other words, the stacking module 130, the power assembly 100 and the current transformer 1000 of the present embodiment combine some advantages of embodiment 2 on the basis of all advantages of embodiment 1, and the overall effect of the actual implementation is better than that of the other two embodiments.

The description of the specification and examples is intended to be illustrative of the scope of the invention, but should not be construed as limiting the scope of the invention. Modifications, equivalents and other improvements which may be made to the embodiments of the invention or to some of the technical features thereof by a person of ordinary skill in the art through logical analysis, reasoning or limited experimentation in light of the above teachings of the invention or the above embodiments are intended to be included within the scope of the invention.

Claims (9)

1. A stacked module for electrically coupling a capacitive module and a power switch module;

the capacitance module comprises a plurality of capacitors; the power switch module comprises three power switch units respectively corresponding to three-phase alternating current, and each power switch unit comprises a plurality of power switches which are electrically coupled with each other to realize current transformation;

it is characterized by comprising:

a first row-stacking unit for carrying the capacitor module;

a second row-on-row unit for carrying the power switch module; the power switch unit is also electrically connected with the first stacking unit, and is configured to enable each power switch unit to be carried behind the power switch unit and to be located on the same plane and electrically coupled with the capacitor module.

2. A gang module as claimed in claim 1 wherein: the first row stacking unit and the second row stacking unit are vertically arranged and matched with each other so that the row stacking module is in an L-shaped structure extending along a first direction; the first stacking unit and the second stacking unit are arranged in parallel to the first direction;

the capacitor module and the power switch module are respectively arranged on the outer sides of the corresponding row stacking units.

3. A gang module as claimed in claim 2 wherein: the stacking module is configured into a first stacking row which is L-shaped and has a bending structure;

two parts perpendicular to each other on the first stacking row respectively form the first stacking row unit and the second stacking row unit.

4. A gang module as claimed in claim 3 wherein:

two notches extending perpendicular to the first direction are formed in the end, away from the first stacking unit, of the part, forming the second stacking unit, of the first stacking unit, and both the notches extend to the connecting position of the first stacking unit and the second stacking unit;

the two notches are arranged at intervals along the first direction so as to define three power switch bearing areas spaced along the first direction for the second row stacking unit;

each power switch unit is respectively arranged in one power switch bearing area.

5. A gang module as claimed in claim 2 wherein: the row-on-row module is configured to include a first row-on-row and three second row-on-row, each in a planar configuration;

the first stacking line constitutes the first stacking line unit;

all the second stacked rows are located on the same plane and arranged at intervals along the first direction; each second stacking row is also lapped with the first stacking row and is respectively used for bearing one power switch unit, and the second stacking rows are jointly formed into the second stacking row unit.

6. The gang module of claim 5 wherein:

the first laminated row comprises a plurality of first sub-busbars which are insulated from each other and are arranged in a laminated manner, and each second laminated row comprises a plurality of second sub-busbars which are insulated from each other and are arranged in a laminated manner and are the same in number as the first sub-busbars;

and each second sub-busbar of each second stacked row is correspondingly lapped with one first sub-busbar of the first stacked row, so that each second stacked row is lapped with the first stacked row and establishes an electrical connection relation.

7. A power assembly, comprising:

a row-by-row module as claimed in any one of claims 1 to 6;

the capacitor module comprises a plurality of capacitors and is loaded on the first stacking unit;

a power switch module including three power switch units respectively corresponding to three-phase alternating current, each power switch unit including a plurality of power switches electrically coupled to each other; the power switch module is carried on the second row-overlapping unit.

8. The power module of claim 7, wherein:

the first row stacking unit and the second row stacking unit are vertically arranged and matched with each other to enable the row stacking module to be in an L-shaped structure extending along a first direction, and the first row stacking unit and the second row stacking unit are arranged in parallel to the first direction;

the capacitor module and the power switch module are respectively arranged at the outer sides of the corresponding stacked units, and the power switch units are arranged at intervals along the first direction; each power switch unit comprises a plurality of power switch groups which are connected in parallel and arranged at intervals along the first direction, and each power switch group comprises a plurality of power switches which are electrically coupled with each other to realize current transformation.

9. A deflector device, comprising:

a power assembly as claimed in claim 7 or 8;

a heat sink for dissipating heat for the three power switch units of the power switch module.

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