CN210867485U - Single-phase power module, converter and wind generating set - Google Patents

Abstract

The application provides a single-phase power module, converter and wind generating set, single-phase power module includes: the IGBT module and the direct current support capacitor are arranged in the shell, and the alternating current row is arranged; one end of the alternating current bar is used for being connected with the IGBT module, the other end of the alternating current bar extends to the outside of the shell from an opening reserved in the shell, and an open slot is formed in the opening; one end of the open slot is communicated with the opening, and the other end of the open slot extends to the edge of the shell. According to the invention, the opening groove is formed in the shell at the position of the opening for the extension of the alternating current bar, and the ferromagnetic loop generated at the opening of the alternating current bar is cut off by utilizing the opening groove, so that the generation of a vortex phenomenon can be completely inhibited, and the vortex heating can be effectively prevented; the over-high local temperature can be effectively inhibited, the failure of electronic components is prevented, and the service lives of the insulating pieces, the copper bars and the like are prolonged; reduce the extra power loss of converter cabinet, raise the efficiency.

Description

Single-phase power module, converter and wind generating set

Technical Field

The application relates to the technical field of converters, in particular to a single-phase power module, a converter and a wind generating set.

Background

At present, a three-phase power module is adopted for a converter in the wind power industry in order to reduce ripple current of a supporting capacitor. However, with the continuous improvement of the converter power, the weight and the volume of the three-phase power module are also continuously increased, and the integration level of the three-phase module is higher, so that the three-phase power module is not beneficial to disassembly, maintenance and transportation, and simultaneously, new requirements on the strength of structural parts are provided.

And single-phase power module is small, easy transportation, the maintenance of being convenient for, but there is the vortex problem of generating heat when single-phase copper bar passes metal casing, and the vortex generates heat and can cause the extra power loss of converter cabinet, can make whole or local high temperature in the converter cabinet and lead to electronic components to become invalid, also can all have very big influence to the life-span of copper bar and insulating part simultaneously.

In the prior art, although a housing of a single-phase power module can adopt stainless steel and the like to improve the eddy current phenomenon, the problem of eddy current heating cannot be completely solved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shortcoming to current mode provides a single-phase power module, converter and wind generating set for solve the unable problem that suppresses the vortex and generate heat completely of exchanging of current single-phase power module.

In a first aspect, an embodiment of the present application provides a single-phase power module, including: the IGBT module and the direct current support capacitor are arranged in the shell, and the alternating current row is arranged; one end of the alternating current bar is used for being connected with the IGBT module, the other end of the alternating current bar extends to the outside of the shell from an opening reserved in the shell, and an open slot is formed in the opening;

one end of the open slot is communicated with the opening, and the other end of the open slot extends to the edge of the shell.

In one possible implementation, the open slot is located at an edge of the housing where the opening is closest to the opening.

In one possible implementation, the open slot is linear or zigzag.

In one possible implementation, the material of the housing includes carbon steel.

In one possible implementation, the ac busbar is fixed to the housing by an insulator.

In one possible implementation, the single-phase power module further includes an ac busbar clamp plate made of an insulating material for insulating the ac busbar from the housing.

In one possible implementation manner, the alternating current gang splint comprises a fixing part and a sleeve part; the sleeve joint part is clamped in the opening; the fixing part is arranged on the inner side surface or the outer side surface of the shell; the alternating current bar penetrates through the fixing part and the sleeve joint part and extends to the outside of the shell; after the fixing part is fixed with the shell, the fixing part at least partially covers the open slot.

In one possible implementation manner, the fixing portion is fixed to the housing through a plurality of first connecting pieces, and at least two first connecting pieces are respectively located at two sides of the open slot.

In a possible implementation manner, the opening is a square opening, first press-riveting nuts are respectively arranged at four corners of the square opening, and the open slot is located between two adjacent first press-riveting nuts; the fixing part is provided with a first connecting hole corresponding to the first press riveting nut; the first connecting piece penetrates through the first connecting hole to be connected with the corresponding first press riveting nut in a matched mode, so that the alternating current gang splints are fixed on the shell.

In one possible implementation, the single-phase power module further comprises an outlet wire lamination and a lamination clamp plate made of an insulating material; the outlet wire stacking row is electrically connected with the IGBT module, and the stacking clamping plate is fixed with the shell through a plurality of second connecting pieces, so that the outlet wire stacking row is fixed on the shell.

In one possible implementation manner, the shell is provided with a reinforcing rib at an edge close to one end of the opening, and one end of the open slot far away from the opening extends to the reinforcing rib; the reinforcing rib is provided with a plurality of second press riveting nuts, and at least two second press riveting nuts are respectively positioned on two sides of the open slot; the stacked clamping plates are provided with second connecting holes corresponding to the second press riveting nuts; the second connecting piece penetrates through the second connecting hole to be connected with the corresponding second press riveting nut, so that the stacked clamping plates are fixed on the shell.

In a second aspect, the present application provides a converter, including the single-phase power module in the first aspect.

In a third aspect, the present application provides a wind turbine generator system, including the converter in the second aspect.

The technical scheme provided by the embodiment of the application has the following beneficial technical effects:

according to the single-phase power module provided by the embodiment of the application, the opening groove for extending the alternating current bar out of the shell is formed, and the opening groove is used for cutting off the ferromagnetic loop generated at the opening of the alternating current bar, so that the generation of an eddy current phenomenon can be completely inhibited, and eddy current heating is effectively prevented; and can effectively restrain local high temperature, prevent that electronic components from becoming invalid, improve life-span such as insulating part, copper bar.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall assembly diagram of a single-phase power module according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of an internal structure of a single-phase power module according to an embodiment of the present disclosure;

fig. 3 is a top view of an internal structure of a single-phase power module according to an embodiment of the present disclosure;

fig. 4 is a schematic partial structural diagram of a housing of a single-phase power module according to an embodiment of the present disclosure;

fig. 5 is a front view of a side of a housing of a single-phase power module provided with an opening according to an embodiment of the present application.

Wherein:

100-a housing; 110-a base plate;

120-a first side panel; 121-opening; 122-open slots; 123-a first clinch nut;

130-a second side plate;

140-reinforcing ribs; 141-second press-riveting nuts;

200-IGBT module;

300-a direct current support capacitor;

400-alternating current row; 410-an insulator;

500-exchange gang splints; 510-a socket joint section; 520-a fixed part; 530-a first connection hole;

600-outlet line stacking;

700-stacking the splints; 710-stacked inner splints; 720-stacked external splint; 730-a second connection hole;

800-switching row;

900-capacitor bank.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The noun explains:

the IGBT is an Insulated Gate Bipolar Transistor in English and an Insulated Gate Bipolar Transistor in Chinese.

The inventor of the present application considers that, when the ac row 400 passes through the opening 121 reserved in the casing 100, an alternating magnetic field is generated around the opening 121, the alternating magnetic field generates an induced current, and the presence of the induced current causes a phenomenon of eddy current heating. Therefore, the embodiment of the application fundamentally inhibits the occurrence of the eddy current phenomenon while ensuring the structural strength by completely cutting off the ferromagnetic circuit.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

With reference to fig. 1 to 4, in an embodiment of the present application, a single-phase power module includes: a housing 100, an IGBT module 200 and a dc support capacitor 300 disposed within the housing 100, and an ac row 400. One end of the ac bar 400 is used for connecting with the IGBT module 200, and the other end extends to the outside of the housing 100 from the opening 121 reserved on the housing 100, and an open slot 122 is provided on the opening 121; one end of the open groove 122 communicates with the opening 121, and the other end of the open groove 122 extends to the edge of the case 100.

According to the single-phase power module provided by the embodiment of the application, the opening groove 122 is formed in the opening 121, which is formed in the shell 100 and used for extending the alternating current bar 400, and the opening groove 122 is used for cutting off a ferromagnetic loop generated by the alternating current bar 400 at the opening 121, so that the generation of an eddy current phenomenon can be completely inhibited, and eddy current heating can be effectively prevented; the over-high local temperature can be effectively inhibited, the failure of electronic components is prevented, and the service lives of the insulating pieces, the copper bars and the like are prolonged; reduce the extra power loss of converter cabinet, raise the efficiency.

In this embodiment, the housing 100 of the single-phase power module is a supporting frame of the whole single-phase power module, and is used for carrying other components and for being fixed to other supports when the single-phase power module is applied to a converter. The ac bar 400 is used for outputting ac power, and one end of the ac bar 400 is used for connecting with the IGBT module 200, and the other end of the ac bar 400 extends from the opening 121 reserved on the housing 100 to the outside of the housing 100 to form an ac terminal. It should be noted that the ac row 400 does not contact the opening 121, and a certain gap is left between the ac row and the opening to prevent short circuit.

The housing 100 in this embodiment includes a bottom plate 110 and at least two side plates disposed opposite to each other, and the IGBT module 200 and the dc supporting capacitor 300 are fixed on the bottom plate 110. For convenience of description, in this embodiment and the following embodiments, a side plate where the opening 121 is located is set as the first side plate 120, a side plate opposite to the first side plate 120 is the second side plate 130, and the first side plate 120 and the second side plate 130 are both connected to the bottom plate 110, and a specific connection manner may be welding or integral molding.

In order to completely cut off the ferromagnetic circuit, an open groove 122 is provided at the opening 121, and the open groove 122 is equivalent to cutting off the first side plate 120 in the thickness direction. One end of the open slot 122 is communicated with the opening 121, and the other end of the open slot 122 extends to the edge of the casing 100, so that the casing 100 around the opening 121 is cut off by the open slot 122, and the ac busbar 400 cannot generate a complete magnetic circuit around the opening 121, thereby fundamentally inhibiting the occurrence of the eddy current phenomenon.

It should be noted that, due to the existence of the opening groove 122, the rigidity of the whole casing 100 may be reduced as long as the support of the internal electrical components and connectors and the connection strength with the external device are not affected.

In an alternative embodiment, as shown in fig. 4 and 5, in order to reduce the influence of the opening groove 122 on the overall rigidity reduction of the housing 100 as much as possible, the opening groove 122 is located between the opening 121 and the edge of the housing 100 nearest to the opening 121, so that the length of the opening groove 122 is the shortest.

Specifically, as shown in fig. 4, the opening 121 is located at the upper right corner of the first side plate 120, and the open slot 122 may be located at the right side or above the opening 121 in the first side plate 120, which is selected according to the distance between the opening 121 and the edge of the first side plate 120. The length of the open slot 122 is the total length between the two ends of the open slot 122.

The single-phase power module provided by this embodiment can reduce the influence of the opening groove 122 on the decrease of the rigidity of the housing 100 as much as possible by reducing the length of the opening groove 122, which is beneficial to improving the strength of the whole single-phase power module and preventing the deformation of the housing 100.

In an alternative embodiment, the shape of the open slot 122 in the first side plate 120 may be a straight line, which facilitates processing and improves manufacturing efficiency. As shown in fig. 4, in order to reduce the influence of the opening groove 122 on the rigidity of the housing 100, the shape of the opening groove 122 in the first housing 100 may be a zigzag shape, so as to reduce the length of the opening 121 at the same position as much as possible. It should be noted that the shape of the opening groove 122 in the first side plate 120 is linear or zigzag, both viewed along the direction of the ac row 400 passing out of the casing 100.

Optionally, the slot width of the open slot 122 is generally between 2mm and 30mm, and does not include 2mm and 30mm, so as to minimize the influence of the open slot 122 on the rigidity reduction of the housing 100.

In an alternative embodiment, the material of the housing 100 comprises stainless steel, aluminum, carbon steel or plated steel to meet rigidity and corresponding electrical connection requirements. Since the cost of stainless steel, aluminum and plated steel is high, the housing 100 of the present embodiment can completely suppress the generation of eddy current by combining the common carbon steel with the open groove 122, and is economical and practical.

In an alternative embodiment, with continued reference to fig. 2 and 3, to prevent short circuits, ac row 400 is secured to housing 100 by insulator 410. Specifically, the portion of the ac busbar 400 inside the housing 100 is disposed along the inside of the housing 100, and may be fixed to the first side plate 120 of the housing 100 by an insulator 410, and connected to the IGBT module 200 by the tap busbar 800. Among them, the insulator 410 is a device capable of withstanding voltage and mechanical stress, which is installed between conductors of different potentials, and is generally made of glass or an insulating material.

In an alternative embodiment, with continued reference to fig. 1, the single-phase power module further includes an ac busbar board 500, and the ac busbar board 500 is made of an insulating material, and may be an SMC (Sheet Molding Compound) material, for insulating the ac busbar 400 from the opening 121 of the housing 100.

Based on the above embodiment, with reference to fig. 1 and fig. 2, optionally, the ac row splint 500 includes a fixing portion 520 and a sleeve portion 510, the fixing portion 520 and the sleeve portion 510 are welded or integrally formed, a channel for the ac row 400 to pass through is provided in the middle, and the ac row 400 passes through the channel and extends to the outside of the casing 100. The shape of the socket 510 may substantially match the shape of the opening 121 so as to be able to be snapped into the opening 121. The fixing portion 520 is disposed on the inner side surface or the outer side surface of the first side plate 120, and for convenience of installation, the cross-sectional area of the fixing portion 520 perpendicular to the channel should be larger than the area of the opening 121, so that when the fixing portion 520 is fixed to the first side plate 120 of the housing 100 through the connector, the fixing portion 520 at least partially covers the opening slot 122.

The single-phase power module provided by the embodiment of the application realizes the insulation between the ac busbar 400 and the opening 121 of the housing 100 by arranging the insulating ac busbar clamping plate 500 at the opening 121, thereby preventing the device from being damaged due to the short circuit phenomenon.

On the basis of the above embodiment, with reference to fig. 1, in order to reinforce the strength of the housing 100 at the opening slot 122, the fixing portion 520 is fixed on the housing 100 by a plurality of first connecting members, and at least two first connecting members are respectively located at two sides of the opening slot 122.

Specifically, the fixing portion 520 in fig. 1 is located outside the casing 100, the fixing portion 520 is connected to the first side plate 120 through a plurality of first connecting members, the first connecting members may be screws, bolts or buckles, and at least two first connecting members are located on two sides of the opening slot 122 respectively, that is, each side of the opening slot 122 is at least provided with one first rivet pressing nut 123, so that when the first connecting members attach and fix the fixing portion 520 of the ac gang splint 500 to the first side plate 120, the ac gang splint 500 as connecting members on two sides of the opening slot 122 may increase the structural strength of the casing 100 at the opening slot 122.

In an alternative embodiment, with continued reference to fig. 4 and 5, the opening 121 of the housing 100 is a square opening 121, the first connecting member is a bolt in this embodiment, and the ac bus bar 500 is connected by a bolt and nut fit. Specifically, first press-riveting nuts 123 may be respectively arranged at four corners of the square opening 121, and the open slot 122 is located between two adjacent first press-riveting nuts 123; the fixing portion 520 is provided with a first connection hole 530 corresponding to the first press-riveting nut 123, and the first connection hole 530 is connected to the corresponding first press-riveting nut 123 in a matching manner, so that the ac gang plywood 500 is fixed to the first side plate 120 of the casing 100.

The single-phase power module that this embodiment provided installs the fixed part 520 of exchanging the gang splint 500 on the lateral surface of casing 100 through a plurality of bolted connection spare, avoids exchanging the opening 121 contact that reserves on row 400 and the casing 100 and cause the short circuit, can regard exchanging the gang splint 500 as the connecting piece of open slot 122 both sides through the first connecting piece that is located open slot 122 both sides respectively simultaneously to strengthen the structural rigidity of open slot 122 department, prevent that casing 100 from warping.

As an alternative implementation manner, with continued reference to fig. 1 to 3, the single-phase power module further includes an outlet stacked row 600 and a stacked row clamping plate 700 made of an insulating material, the outlet stacked row 600 is electrically connected to the IGBT module 200, and the stacked row clamping plate 700 is fixed to the housing 100 through a plurality of second connecting members, so that the outlet stacked row 600 is fixed to the housing 100.

The single-phase power module provided by this embodiment can also enhance the rigidity of the entire housing 100 while fixing the outlet stacked row 600 by using the stacked row clamping plate 700.

In this embodiment, the outlet stacked row 600 is used for outputting a direct current to the outside, specifically, the capacitor stacked row 900 is used for connecting with the IGBT module 200, and the stacked row clamping plate 700 is made of an insulating material and is used for supporting and fixing the outlet stacked row 600 and keeping the outlet stacked row 600 insulated from the housing 100. Specifically, the stacked row clamping plate 700 is fixed to one end of the casing 100 close to the opening 121 through a plurality of second connectors, and the stacked row clamping plate 700 is fixedly connected to the side edge of the first side plate 120 and the side edge of the second side plate 130, respectively, so as to fix the line stacked row 600 on the casing 100.

Alternatively, as shown in fig. 4 and 5, the housing 100 is provided with a reinforcing rib 140 at an edge near one end of the opening 121, and one end of the open groove 122 far from the opening 121 extends to the reinforcing rib 140; the reinforcing rib 140 is provided with a plurality of second press-riveting nuts 141, and at least two second press-riveting nuts 141 are respectively positioned at two sides of the open slot 122; the stacked clamping plate 700 is provided with a second connecting hole 730 corresponding to the second press-riveting nut 141; the second connecting member passes through the second connecting hole 730 to be connected to the corresponding second rivet pressing nut 141, so that the stacked clamping plate 700 is fixed to the housing 100.

In this embodiment, in order to facilitate the installation of the stacked row clamping plate 700 and enhance the rigidity of the casing 100 at the opening groove 122, two reinforcing ribs 140 may be provided at the edge of one end of the casing 100 close to the opening 121, the two reinforcing ribs 140 are respectively provided at the side edges of the first side plate 120 and the second side plate 130 and are bent inward, and the reinforcing ribs 140 are further provided with a plurality of second clinch nuts 141 for fixedly connecting the outlet stacked row 600.

The end of the open slot 122 far away from the opening 121 continues to extend to the edge of the reinforcing rib 140 on the first side plate 120, and the second rivet pressing nuts 141 are respectively located at two sides of the open slot 122, i.e. each side of the open slot 122 is at least provided with one second rivet pressing nut 141, so that when two ends of the second connecting piece are respectively fixedly connected with the reinforcing ribs 140 on the first side plate 120 and the second side plate 130, the stacked clamping plate 700 can further increase the structural strength of the casing 100 as the connecting pieces at two sides of the open slot 122, and the casing 100 is prevented from deforming.

Specifically, the stacked clamping plate 700 is provided with a second connection hole 730 corresponding to the second press-riveting nut 141, and the second connection member passes through the second connection hole 730 to be connected with the corresponding second press-riveting nut 141, so that the stacked clamping plate 700 is fixed on the casing 100. The second connecting member in this embodiment may be a bolt for being connected with the second rivet pressing nut 141 in a fitting manner. The stacked clamping plates 700 can be multiple, and the multiple stacked clamping plates 700 are arranged at intervals up and down so that the outgoing line stacked plate is fixed more firmly.

Further, fold row splint 700 including fold row interior splint 710 and fold row outer splint 720, fold row interior splint 710 and fold row outer splint 720 and be nylon insulation material, fold row interior splint 710 and fold the both ends of arranging outer splint 720 all be equipped with second connecting hole 730, it arranges between fold row interior splint 710 and fold row outer splint 720 to be qualified for the next round of competitions and fold row 600, the second connecting piece passes the second connecting hole 730 that folds row interior splint 710, fold row outer splint 720's second connecting hole 730 and the second of corresponding pressure rivet nut 141 and screw up in proper order to fold row splint 700 and be qualified for the next round of competitions and fold row 600 and fix on casing 100. The outgoing line stacked row 600 is fixed on the housing 100 by a clamping force between the stacked row inner clamping plate 710 and the stacked row outer clamping plate 720.

It should be noted that, in the present embodiment, when the second rivet pressing nut 141 is disposed on the reinforcing rib 140, the positions of the first rivet pressing nuts 123 on both sides of the open slot 122 may be close to the position of the opening 121, and the first rivet pressing nuts 123 may be reinforced from the beginning and the end of the open slot 122 at the same time, so that the overall strength of the module is not weakened while the eddy current heat generation is effectively prevented.

The single-phase power module provided by this embodiment installs the laminated clamp plate 700 on the stiffener 140 of the housing 100 through a plurality of second connectors, thereby avoiding the short circuit caused by the direct contact between the outgoing line laminated clamp plate 600 and the housing 100, and meanwhile, the laminated clamp plate 700 can be used as the connectors on both sides of the open slot 122 through the second connectors respectively located on both sides of the open slot 122, thereby further enhancing the structural rigidity of the housing 100 at the position of the open slot 122.

Based on the same inventive concept, the embodiment of the present application further provides a converter, which includes at least one single-phase power module in each of the above embodiments. The number of the single-phase power modules can be reasonably selected according to the specific application requirements of the converter. In addition, the converter still includes the cabinet body, and each single-phase power unit sets up along the direction of height detachably of the cabinet body in proper order, and on the one hand is convenient to be changed and is dismantled, and on the other hand conveniently lays wire and connects, also can improve the reliability.

Based on the same inventive concept, the embodiment of the application also provides a wind generating set, which comprises the converter in the embodiment.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. the opening for the extension of the alternating current bar on the shell is provided with the open slot, and the ferromagnetic loop generated at the opening of the alternating current bar is cut off by utilizing the open slot, so that the generation of the eddy current phenomenon can be completely inhibited, and the eddy current is effectively prevented from heating; the over-high local temperature can be effectively inhibited, the failure of electronic components is prevented, and the service lives of the insulating pieces, the copper bars and the like are prolonged; reduce the extra power loss of converter cabinet, raise the efficiency.

2. By reducing the length of the open slot, the influence of the open slot on the rigidity of the shell can be reduced as much as possible, the strength of the whole single-phase power module is improved, and the shell is prevented from deforming.

3. The shell adopts a mode of combining common carbon steel with an open slot to completely inhibit the generation of vortex, and is economical and practical.

4. The fixing parts of the alternating current busbar plates are installed on the outer side face of the shell through the first connecting pieces, short circuit caused by the fact that the alternating current busbar and the opening reserved on the shell are contacted is avoided, meanwhile, the alternating current busbar plates can serve as connecting pieces on two sides of the open slot through the first connecting pieces located on two sides of the open slot respectively, and therefore structural rigidity of the open slot is enhanced.

5. The stacked clamping plates are arranged on the reinforcing ribs of the shell through the second connecting pieces, the phenomenon that the outgoing line is directly contacted with the shell to cause short circuit is avoided, meanwhile, the stacked clamping plates can serve as the connecting pieces on two sides of the open slot through the second connecting pieces respectively located on two sides of the open slot, and the structural rigidity of the shell at the position of the open slot is further enhanced.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (13)

1. A single-phase power module, comprising: the IGBT module and the direct current support capacitor are arranged in the shell, and the alternating current row is arranged;

one end of the alternating current bar is used for being connected with the IGBT module, the other end of the alternating current bar extends to the outside of the shell from an opening reserved in the shell, and an open slot is formed in the opening;

one end of the open slot is communicated with the opening, and the other end of the open slot extends to the edge of the shell.

2. The single-phase power module of claim 1, wherein the open slot is located at an edge of the housing where the opening is closest to the opening.

3. The single-phase power module of claim 1, wherein the open slots are linear or serpentine.

4. The single phase power module of claim 1, wherein the material of the housing comprises carbon steel.

5. The single phase power module of claim 1, wherein the ac row is secured to the housing by an insulator.

6. The single-phase power module of any one of claims 1 to 5, further comprising an AC busbar clamp made of an insulating material for insulating the AC busbar from the housing.

7. The single-phase power module of claim 6, wherein the ac busbar board includes a fixed portion and a sleeved portion;

the sleeve joint part is clamped in the opening; the fixing part is arranged on the inner side surface or the outer side surface of the shell; the alternating current bar penetrates through the fixing part and the sleeve joint part and extends to the outside of the shell;

after the fixing part is fixed with the shell, the fixing part at least partially covers the open slot.

8. The single-phase power module as claimed in claim 7, wherein the fixing portion is fixed to the housing by a plurality of first connecting members, and at least two of the first connecting members are respectively located at both sides of the opening slot.

9. The single-phase power module according to claim 8, wherein the opening is a square opening, first rivet pressing nuts are respectively arranged at four corners of the square opening, and the open slot is located between two adjacent first rivet pressing nuts;

the fixing part is provided with a first connecting hole corresponding to the first press riveting nut;

the first connecting piece penetrates through the first connecting hole to be connected with the corresponding first press riveting nut in a matched mode, so that the alternating current gang splints are fixed on the shell.

10. The single phase power module of claim 6, further comprising an outlet stack and a stack clamp plate made of an insulating material; the outlet wire stacking row is electrically connected with the IGBT module, and the stacking clamping plate is fixed with the shell through a plurality of second connecting pieces, so that the outlet wire stacking row is fixed on the shell.

11. The single-phase power module of claim 10, wherein the housing is provided with a reinforcing rib at an edge near an end of the opening, and an end of the open slot remote from the opening extends to the reinforcing rib;

the reinforcing rib is provided with a plurality of second press riveting nuts, and at least two second press riveting nuts are respectively positioned on two sides of the open slot;

the stacked clamping plates are provided with second connecting holes corresponding to the second press riveting nuts;

the second connecting piece penetrates through the second connecting hole to be connected with the corresponding second press riveting nut, so that the stacked clamping plates are fixed on the shell.

12. A power converter comprising at least one single-phase power module according to any one of claims 1 to 11.

13. A wind park comprising a converter according to claim 12.

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