A power module and a wind power converter

Abstract

The application discloses a power module and a wind power converter, relates to the technical field of power electronics, and comprises a power module body, a direct-current bus, a core plate and a protective cover. The core plate is electrically connected with the power module body. The protective cover has a protective space. The power module body and the core plate are arranged in the protective space. The direct-current bus is arranged outside the protective space. The protective cover is used for playing a protection role of anti-condensation and dust prevention. The direct-current bus is arranged above the power module body and is electrically connected with the power module body. The top of the protective cover abuts against the direct-current bus. Condensation formed on the outer wall of the direct-current bus flows to the side of the protective cover away from the power module body along the abutting position of the protective cover and the direct-current bus, that is, along the outer wall of the protective cover, so that the power module body and the core plate are prevented from being affected by the condensation on the direct-current bus.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and more specifically, to a power module and a wind power converter. Background Technology

[0002] Wind turbines typically operate outdoors, where high humidity and large temperature variations make them prone to condensation. As the core component of wind power converters, the reliability of power modules will be significantly reduced once affected by condensation.

[0003] Therefore, how to reduce the impact of condensation on the operational reliability of power modules has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a power module to reduce the impact of condensation on the operational reliability of the power module.

[0005] Another objective of this application is to provide a wind power converter including the aforementioned power module.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A power module, comprising:

[0008] Power module body;

[0009] The DC bus is electrically connected to the power module body.

[0010] The core board is electrically connected to the power module body;

[0011] The protective cover has a protective space, in which the power module body and the core board are both disposed, the DC bus is disposed outside the protective space, and the top of the protective cover abuts against the DC bus.

[0012] Optionally, in the power module described above, the protective cover includes a protective cover body and a first folded edge, the protective space is disposed on one side of the protective cover body, one end of the first folded edge is connected at an angle to the top of the protective cover body, the end of the first folded edge away from the protective cover body abuts against the DC bus, and the first folded edge is a planar structure or a bent structure.

[0013] Optionally, the power module described above further includes a mounting component, at least one of the power module body and the core board is connected to the mounting component, and the mounting component encloses the power module body and the core board within the protective space, and the protective cover is connected to the mounting component.

[0014] Optionally, in the power module described above, a first connecting hole is provided on the first folded edge, and a first connector passes through the first connecting hole and connects the first folded edge to the mounting assembly.

[0015] Optionally, in the power module described above, the protective cover further includes a second folded edge, one end of which is connected to the main body of the protective cover, and the end of the second folded edge away from the main body of the protective cover abuts against the mounting component. A second connecting hole is provided on the second folded edge, and a second connector passes through the second connecting hole and connects the second folded edge to the mounting component.

[0016] Optionally, in the power module described above, a wiring hole is provided on the second folded edge, and the wiring hole is arranged opposite to the wiring position on the core board.

[0017] Optionally, in the power module described above, the mounting assembly includes at least one of a mounting plate and a heat dissipation module, and the heat dissipation module is disposed between the mounting plate and the power module body.

[0018] Optionally, in the power module described above, the protective cover further includes a third folded edge, one end of which is connected to the bottom of the protective cover body, and the end of the third folded edge away from the protective cover body extends in a direction closer to or away from the power module body.

[0019] Optionally, in the power module described above, the protective cover body is provided with a condensation collection tank. The condensation collection tank includes a collection part and a discharge part. The two ends of the collection part extend to the two ends of the protective cover body in the horizontal direction, respectively. The discharge part is located at the bottom of the collection part and communicates with the collection part.

[0020] Optionally, the power module described above also includes a seal, which is disposed on the top of the protective cover and the protective cover abuts against the DC bus through the seal.

[0021] Optionally, in the power module described above, the DC bus has a horizontal portion and a vertical portion, the horizontal portion extends in a horizontal direction, the vertical portion extends in a vertical direction, and the top of the protective cover abuts against the horizontal portion or the vertical portion.

[0022] Optionally, in the power module described above, the protective cover is made of a transparent material;

[0023] Alternatively, the protective cover may have an observation window, and the observation window may be fitted with a transparent plate made of transparent material.

[0024] A wind power converter includes a cabinet and the aforementioned power module, wherein the power module is disposed inside the cabinet.

[0025] The power module provided in this application includes a power module body, a DC bus, a core board, and a protective cover. The power module body, DC bus, and core board are the core components for realizing the control and power conversion functions of the power module. The core board is electrically connected to the power module body. The protective cover has a protective space, within which the power module body and core board are housed. The DC bus is located outside the protective space. The protective cover serves to prevent condensation and dust. The DC bus is positioned above the power module body and electrically connected to it. The top of the protective cover abuts against the DC bus. Condensation formed on the outer wall of the DC bus flows along the contact point between the protective cover and the DC bus towards the side of the protective cover away from the power module body, i.e., along the outer wall of the protective cover, thus protecting the power module body and core board from the effects of condensation on the DC bus.

[0026] Compared to related technologies, the power module provided in this application, by setting a protective cover, allows condensation collected by the DC bus to slide directly down the outer wall of the protective cover without passing through the power module body and core board, thereby providing anti-condensation protection for the power module body and core board and reducing the impact of condensation on the operational reliability of the power module. The protective cover can also protect the power module body and core board from the impact of explosions of other surrounding components, improving safety. In addition, the protective cover also has a certain dustproof capability, which can make the operation of the power module body and core board more reliable.

[0027] The wind power converter provided in this application includes a cabinet and the aforementioned power module. The power module is located inside the cabinet. Since it includes the aforementioned power module, it also has the aforementioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the assembly structure of the power module and DC bus disclosed in the embodiments of this application. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the assembly structure of the power module and DC bus disclosed in the embodiments of this application. Figure 2 ;

[0031] Figure 3 for Figure 2A magnified view of a section at point A in the middle;

[0032] Figure 4 This is a schematic diagram of the assembly structure of the power module and DC bus disclosed in the embodiments of this application. Figure 3 ;

[0033] Figure 5 This is a schematic diagram of the structure of the first protective cover disclosed in the embodiments of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the second type of protective cover disclosed in the embodiments of this application.

[0035] Among them, 100 is the protective cover, 110 is the main body of the protective cover, 111 is the observation window, 112 is the condensation collection tank, 112a is the collection part, 112b is the discharge part, 120 is the first folded edge, 130 is the second folded edge, 131 is the wiring hole, 140 is the third folded edge, 141 is the connecting ear, 200 is the core plate, 300 is the heat dissipation module, 400 is the DC bus, 410 is the horizontal part, 420 is the vertical part, 500 is the sealing element, 600 is the mounting plate, and 700 is the first connecting element. Detailed Implementation

[0036] The core of this application is to disclose a power module that reduces the impact of condensation on the operational reliability of the power module.

[0037] Another key aspect of this application is the disclosure of a wind power converter that includes the aforementioned power module.

[0038] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the utility model as described in the claims. It should be noted that, for ease of description, only the parts relevant to the utility model are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0039] It should be noted that in the accompanying drawings of this application embodiment, the arrow marked X represents the first direction X, the arrow marked Z represents the second direction Z, and the arrow marked Y represents the third direction Y. The first direction X, the second direction Z, and the third direction Y are all perpendicular to each other. The first direction X, the second direction Z, and the third direction Y are introduced to more clearly illustrate the structure and relative positional relationship of each component in the power module. In practical applications, the first direction X, the second direction Z, and the third direction Y may change depending on the placement of the power module. For example, the following description uses the first direction X as the width direction of the power module, the second direction Z as the height direction of the power module, and the third direction Y as the length direction of the power module. In addition, in the accompanying drawings of this application embodiment, each arrow indicates the flow direction of condensation.

[0040] The operating environment of air-cooled converters is complex, and the internal and external environments are interconnected, making the anti-condensation structure of internal components crucial. Currently, anti-condensation measures inside wind power converters mainly involve hardware and control logic, such as attaching anti-condensation insulation cotton to the top of the cabinet; adding heaters inside the cabinet and controlling the heaters according to preset logic algorithms to reduce humidity inside the converter. However, these anti-condensation structures can, to some extent, affect the heat dissipation performance of air-cooled converters.

[0041] Combination Figure 1 In the actual layout of a wind power converter, the power module includes a DC bus 400 and a power module body. The DC bus 400 is electrically connected to the power module body and is usually located above the power module body. During environmental storage or alternating humid and hot conditions, condensation easily forms on the outer wall of the DC bus 400. Under the action of gravity, the condensation will automatically flow downward along the outer wall of the DC bus 400 until it flows from the connection between the DC bus 400 and the power module body to the power module body. This affects the electrical clearance and creepage distance of the power module, causing a short circuit in the power module, greatly reducing the reliability of the power module operation, and shortening its service life. Based on this, this application discloses the following power module and wind power converter.

[0042] Combination Figures 1-3The power module disclosed in this application includes a power module body, a DC bus 400, a core board 200, and a protective cover 100. The power module body, DC bus 400, and core board 200 are the core components for realizing the control and power conversion functions of the power module. The core board 200 is electrically connected to the power module body and is disposed on one side of the power module body. The protective cover 100 has a protective space, in which the power module body and the core board 200 are disposed, and the DC bus 400 is disposed outside the protective space. The protective cover 100 serves to provide protection against condensation and dust. For example, the protective cover 100 can be a cubic structure with an opening on one side. The DC bus 400 is positioned above the power module body and is electrically connected to the power module body. The top of the protective cover 100 abuts against the DC bus 400. The condensation formed on the outer wall of the DC bus 400 flows along the abutment position of the protective cover 100 and the DC bus 400 to the side of the protective cover 100 away from the power module body, that is, along the outer wall of the protective cover 100, so as to protect the power module body and the core board 200 from the effects of the condensation on the DC bus 400.

[0043] Compared to related technologies, the embodiments of this application, by setting a protective cover 100, allow condensation collected by the DC bus 400 to slide directly down the outer wall of the protective cover 100 without passing through the power module body and core board 200, thereby providing anti-condensation protection for the power module body and core board 200 and reducing the impact of condensation on the operational reliability of the power module. The protective cover 100 can also protect the power module body and core board 200 from the impact of explosions of other surrounding components, improving safety. In addition, the protective cover 100 also has a certain dustproof capability, which can make the operation of the power module body and core board 200 more reliable.

[0044] Specifically, in some embodiments disclosed in this application, the protective cover 100 includes a protective cover body 110 and a first folded edge 120. The protective cover body 110 has a flat plate structure, and the protective space is disposed on one side of the protective cover body 110. One end of the first folded edge 120 is connected to the top of the protective cover body 110. Figure 2 and Figure 3 The end of the first fold 120 away from the protective cover body 110 extends toward the DC bus 400 and abuts against the bottom of the DC bus 400. The condensation on the DC bus 400 can flow along the first fold 120 toward the side of the protective cover body 110 away from the power module body, so that the core board 200 and the power module body located in the protective space are protected from the effects of condensation and can operate reliably.

[0045] Specifically, the first folded edge 120 and the protective cover body 110 can be arranged at an angle, and the first folded edge 120 itself can be a flat plate structure or a bent structure; this embodiment of the application does not limit this. For example, Figure 3 The image shows a technical solution for a right-angle bend in which the cross-section of the first folded edge 120 itself is an L-shaped structure. Figure 4 The diagram shows a technical solution in which the first folded edge 120 itself is a flat plate structure and is arranged at an angle to the main body 110 of the protective cover.

[0046] The core board 200 can be directly fixed to the power module body by means of screwing, snap-fitting, welding, etc.; the power module body can be fixed to the protective cover 100 by means of screwing, snap-fitting, etc. Alternatively, the power module also includes a mounting component, which is set on one side of the protective space of the protective cover 100, and at least one of the power module body and the core board 200 is connected to the mounting component. The mounting component can enclose both the power module body and the core board 200 in the protective space, and the protective cover 100 is also connected to the mounting component.

[0047] Specifically, in some embodiments, a first connecting hole is provided on the first folded edge 120, and an adapter hole corresponding to the first connecting hole is provided on the mounting component. The first connector 700 can pass through the first connecting hole and the adapter hole to connect the first folded edge 120 to the mounting component. The structure is simple and the installation is convenient. It should be noted that since a gap needs to be reserved between the first folded edge 120 and the mounting component for the DC bus 400 to pass through and connect to the power module body, the first connector 700 may specifically include a double-ended screw and a nut. The double-ended screw passes through the first connecting hole, and one end of it is screwed into the adapter hole on the mounting component. The other end is fastened to the protective cover 100 by the nut. The structure is simple and the connection is reliable.

[0048] In other embodiments, the protective cover 100 further includes a second folded edge 130. Taking the actual arrangement direction in use as an example, there can be two second folded edges 130, symmetrically arranged at both ends of the protective cover body 110 in the horizontal direction. One end of the second folded edge 130 is connected to the protective cover body 110, and the end of the second folded edge 130 away from the protective cover body 110 abuts against the mounting component. A second connecting hole is provided on the second folded edge 130, and an adapter hole corresponding to the second connecting hole is provided on the mounting component. A second connector passes through the second connecting hole and connects the second folded edge 130 and the mounting component, thereby achieving reliable fixation of the protective cover 100. In this embodiment, since the second folded edge 130 is not affected by the DC bus 400 and can directly contact the mounting component, the second connector can be a screw, pin, or other connector. The second folded edge 130 itself can be a flat plate structure or a bent structure; this application embodiment does not limit this.

[0049] The protective cover 100 may have both the first and second connecting holes described above to ensure the reliability of the connection between the protective cover 100 and the mounting assembly. This application embodiment does not limit the number of the first and second connecting holes.

[0050] The aforementioned mounting components may specifically include a mounting plate 600. Multiple power modules are typically arranged in a wind power converter; therefore, multiple power modules can share the same mounting plate to reduce assembly costs. Furthermore, the mounting components also include a heat dissipation module 300, which is disposed between the mounting plate 600 and the power module body to directly dissipate heat from the power module body. The core plate 200 is disposed between the power module body and the protective cover 100, and the heat dissipation module 300 indirectly dissipates heat from the core plate 200, ensuring the normal operation of the power module. The heat dissipation module 300 can specifically employ liquid cooling, air cooling, or a hybrid air-liquid cooling method for heat dissipation. Correspondingly, the heat dissipation module 300 includes structures such as a fan and a liquid cooling plate; this embodiment does not limit the specific components used.

[0051] To facilitate wiring of the core board 200, combined with Figure 2 and Figure 5 A wiring hole 131 is also provided on the second folded edge 130. The wiring hole 131 is arranged opposite to the wiring position on the core board 200, which facilitates the wiring of the core board 200 with other devices such as the wave generator board, and provides convenience for subsequent maintenance and wiring.

[0052] Combination Figure 4 The protective cover 100 may also include a third folded edge 140. One end of the third folded edge 140 is connected to the bottom of the protective cover body 110. The end of the third folded edge 140 away from the protective cover body 110 may extend towards or away from the power module body. The third folded edge 140 is mainly used to guide the flow of condensation flowing down from the protective cover body 110, which facilitates subsequent processing and avoids affecting other devices in the wind power converter. Depending on the actual layout inside the air-cooled converter cabinet, the third folded edge 140 can specifically guide the condensation to the side that is closer to or away from the power module body.

[0053] A third connecting hole can also be made on the third folded edge 140, and the connection to the mounting assembly can be made via a third connector. Figure 5 The invention illustrates a technical solution in which connecting ears 141 are provided at both ends of the third folded edge 140 along the horizontal direction, and a third connecting hole is formed on the connecting ears 141. The third folded edge 140 itself can be a flat structure or a bent structure, and the embodiments of this application do not limit it in this way.

[0054] The protective space is formed by the protective cover body 110, the first folded edge 120, the second folded edge 130, and the third folded edge 140. The protective cover body 110 and the aforementioned first folded edge 120, second folded edge 130, and third folded edge 140 can be manufactured into an integral structure by welding or other methods, or the various structures of the protective cover 100 can be formed directly on a steel plate by bending the steel plate. The structure is simple and easy to manufacture. The first folded edge 120, second folded edge 130, and third folded edge 140 can enhance the overall structural strength of the protective cover 100.

[0055] Furthermore, to improve the anti-condensation effect, the power module also includes a sealing element 500. The sealing element 500 is disposed on the top of the protective cover 100, and the protective cover 100 abuts against the DC bus 400 through the sealing element 500. Condensation on the DC bus 400 flows through the sealing element 500 to the side of the protective cover 100 facing away from the power module body. The sealing element 500 ensures a tight seal at the connection between the protective cover 100 and the DC bus 400, thereby effectively preventing leaks in the protective cover 100 and improving the anti-condensation effect. Specifically, the sealing element 500 can be a sealing strip structure, for example, combined with... Figure 3 The seal 500 can be snapped onto the end of the first fold 120 away from the protective cover body 110 and abut against the DC bus 400.

[0056] Combination Figure 4 Taking the layout in actual use as an example, the DC bus 400 has a horizontal part 410 and a vertical part 420, wherein the horizontal part 410 extends in the horizontal direction and the vertical part 420 extends in the vertical direction.

[0057] The top of the protective cover 100 can abut against the horizontal part 410 or the vertical part 420. Correspondingly, protective covers 100 with different first folded edges 120 can be selected, allowing for flexible arrangement.

[0058] To prevent the protective cover 100 from interfering with the visual inspection of the core board 200 by maintenance personnel, the protective cover 100 can be made of transparent materials such as glass, acrylic sheet, polycarbonate, polyvinyl alcohol, or transparent ceramic, so that maintenance personnel can directly visually inspect the core board 200 from the outside of the protective cover 100. Alternatively, in combination with Figure 6 An observation window 111 is provided on the protective cover 100. The observation window 111 is arranged opposite to the location where at least one of the power module body and the core board 200 is prone to failure. A transparent plate made of transparent material such as glass, acrylic sheet, polycarbonate, polyvinyl alcohol or transparent ceramic is provided at the observation window 111. The transparent plate is reliably sealed to the observation window 111. Through the transparent plate, maintenance personnel can directly observe the operation of at least one of the power module body and the core board 200 with the naked eye, thereby improving maintenance efficiency.

[0059] It should be noted that the outer surface of the protective cover 100 facing away from the power module body and the core board 200 is the main flow area of ​​condensation. Therefore, a hydrophobic coating can be applied to this outer surface of the protective cover 100 to facilitate the dripping of condensation from the protective cover 100 and subsequent treatment of the condensation, thereby reducing the humidity inside the wind power converter cabinet.

[0060] Furthermore, combining Figure 6 A condensation collection tank 112 can be provided on the protective cover body 110. The condensation collection tank 112 includes a collection part 112a and a discharge part 112b. The collection part 112a is a trough-shaped structure, and its two ends extend to the two ends of the protective cover body 110 in the horizontal direction, so as to ensure that the condensation flowing down from various positions on the top of the protective cover body 110 can be collected into the collection part 112a. The discharge part 112b is located at the bottom of the collection part 112a and is connected to the collection part 112a. Under the action of gravity, the condensation at various positions on the protective cover body 110 can flow into the collection part 112a, and finally be discharged or treated in a unified manner through the discharge part 112b, thereby facilitating management and reducing safety hazards. The collecting section 112a can be a structure that is inclined toward the discharging section 112b, or in other words, the collecting section 112a is inclined relative to the horizontal direction, while the discharging section 112b is located at the lowest point of the collecting section 112a, so as to facilitate the flow of condensation in the collecting section 112a into the collecting section 112a.

[0061] The wind power converter disclosed in this application includes a cabinet and the aforementioned power module. The power module is located inside the cabinet. Since it includes the aforementioned power module, it also has the aforementioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here.

[0062] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, and at least one can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "arranged along the horizontal direction" means completely parallel or almost completely parallel to the horizontal direction, and "arranged along the vertical direction" means completely parallel or almost completely parallel to the vertical direction. For example, a range of 10° within which they are completely parallel is considered parallel.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power module, characterized in that, include: Power module body; The DC bus (400) is electrically connected to the power module body; The core board (200) is electrically connected to the power module body; The protective cover (100) has a protective space, the power module body and the core board (200) are both disposed in the protective space, the DC bus (400) is disposed outside the protective space, and the top of the protective cover (100) abuts against the DC bus (400).

2. The power module as described in claim 1, characterized in that, The protective cover (100) includes a protective cover body (110) and a first folded edge (120). The protective space is disposed on one side of the protective cover body (110). One end of the first folded edge (120) is connected at an angle to the top of the protective cover body (110). The end of the first folded edge (120) away from the protective cover body (110) abuts against the DC bus (400). The first folded edge (120) is a planar structure or a bent structure.

3. The power module as described in claim 2, characterized in that, It also includes an installation component, at least one of the power module body and the core board (200) is connected to the installation component, and the installation component encloses the power module body and the core board (200) in the protective space, and the protective cover (100) is connected to the installation component.

4. The power module as described in claim 3, characterized in that, The first folded edge (120) is provided with a first connecting hole, and the first connector (700) passes through the first connecting hole and connects the first folded edge (120) to the mounting assembly.

5. The power module as described in claim 3, characterized in that, The protective cover (100) further includes a second folded edge (130), one end of which is connected to the protective cover body (110), and the end of the second folded edge (130) away from the protective cover body (110) abuts against the mounting component. A second connecting hole is provided on the second folded edge (130), and a second connector passes through the second connecting hole and connects the second folded edge (130) and the mounting component.

6. The power module as described in claim 5, characterized in that, The second folded edge (130) is provided with a wiring hole (131), which is arranged opposite to the wiring position on the core plate (200).

7. The power module as described in claim 3, characterized in that, The mounting assembly includes at least one of a mounting plate (600) and a heat dissipation module (300), and the heat dissipation module (300) is disposed between the mounting plate (600) and the power module body.

8. The power module as described in claim 2, characterized in that, The protective cover (100) also includes a third fold (140), one end of which is connected to the bottom of the protective cover body (110), and the end of the third fold (140) away from the protective cover body (110) extends toward or away from the power module body.

9. The power module as described in claim 2, characterized in that, The protective cover body (110) is provided with a condensation collection tank (112). The condensation collection tank (112) includes a collection part (112a) and a discharge part (112b). The two ends of the collection part (112a) extend to the two ends of the protective cover body (110) in the horizontal direction. The discharge part (112b) is located at the bottom of the collection part (112a) and communicates with the collection part (112a).

10. The power module as described in claim 1, characterized in that, It also includes a seal (500) disposed on the top of the protective cover (100), and the protective cover (100) abuts against the DC bus (400) through the seal (500).

11. The power module as described in claim 1, characterized in that, The DC bus (400) has a horizontal portion (410) and a vertical portion (420), the horizontal portion (410) extending in a horizontal direction and the vertical portion (420) extending in a vertical direction, and the top of the protective cover (100) abuts against the horizontal portion (410) or the vertical portion (420).

12. The power module as described in claim 1, characterized in that, The protective cover (100) is made of a transparent material; Alternatively, the protective cover (100) may have an observation window (111) and a transparent plate made of transparent material may be provided at the observation window (111).

13. A wind power converter, characterized in that, include: Server rack; The power module as described in any one of claims 1-12, wherein the power module is disposed inside the cabinet.

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