Electrical protection structure and frequency converter

Abstract

The utility model provides an electrical protection structure and a frequency converter, and the electrical protection structure comprises a drive board, a control board, and a first insulating separator. The end face of one side of the control board is an assembly face, the end face of the other side of the control board is a welding face, and in order to reduce the gap between the welding face and the driving board as much as possible, a first insulation isolation piece is arranged between the welding face of the driving board and the welding face of the control board. The first insulating separator has a breakdown voltage higher than that of air, so that the electrical safety between the control board and the driving board can be ensured on the premise that the gap between the welding surface and the driving board is as small as possible. The first insulating separator is specifically clamped on the designated area of the control board so as to form an effective barrier for the welding surface, and the occupied space between the welding surface and the driving board is reduced as much as possible.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrical equipment, and more particularly relates to an electrical protection structure and a frequency converter. BACKGROUND

[0002] In order to improve the portability of the frequency converter and reduce the required installation space, miniaturization of the frequency converter has become a significant development trend. With the continuous reduction of the volume of the frequency converter, the internal electronic components, including but not limited to capacitors, resistors, inductors, transistors, and integrated circuits, have to be arranged in a more compact manner.

[0003] While pursuing miniaturization, it is also necessary to strictly comply with electrical safety-related standards, such as the European Conformity (CE) standard and the Underwriters Laboratories (UL) certification standard in the United States. These standards have clear and strict provisions for electrical safety gaps in electrical products, aiming to prevent safety hazards such as short circuits, arc discharges, or electric shocks caused by too close distances between components. The requirement of electrical safety gaps ensures that the equipment can maintain its electrical insulation performance even under extreme working conditions, thereby protecting the operating personnel from electric shock and preventing the equipment from being damaged due to electrical failure.

[0004] In the miniaturization process of the frequency converter, the electrical safety gap obviously becomes an obstacle to further reducing the gap between electronic components, thereby making it difficult for each electronic component to exceed the electrical safety gap, so that the volume of the frequency converter is further reduced. CONTENT OF THE INVENTION

[0005] The purpose of the embodiment of the application is to provide an electrical protection structure and a frequency converter to solve the technical problem of insufficient electrical protection performance when the gap between electronic components in the frequency converter is smaller than the electrical safety gap in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the application is:

[0007] An electrical protection structure is provided, comprising:

[0008] a drive board;

[0009] a control board, one side end face being a component face and the other side end face being a welding face;

[0010] a first insulation isolation piece arranged between the drive board and the welding face of the control board, the first insulation isolation piece being clamped on a specified area of the welding face.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, the first insulation spacer is an insulation cover, the control panel has positioning holes, and the insulation cover has positioning protrusions.

[0013] Optionally, the insulation cover further has clamping hooks, the clamping hooks are clamped on the control panel, and the insulation cover is clamped on the control panel.

[0014] Optionally, the number of the positioning protrusions and the clamping hooks is multiple, the positioning protrusions are arranged at intervals, and the clamping hooks are clamped on the two side edges of the control panel.

[0015] Optionally, the insulation cover further has an extension part extending along the plane direction of the control panel, and the extension part is used for increasing the covering area of the insulation cover.

[0016] Optionally, the application further comprises:

[0017] a heat sink in contact with the drive panel;

[0018] a second insulation spacer arranged between the drive panel and the heat sink.

[0019] Optionally, the second insulation spacer is an insulation sleeve arranged between the drive panel and the heat sink, one end of the insulation sleeve is abutted on the drive panel, and the other end of the insulation sleeve is clamped on the heat sink.

[0020] Optionally, the insulation sleeve comprises a sleeve body having a clamping groove, the insertion end of the clamping groove has a plug-in part extending along the insertion direction, and the two side walls of the clamping groove further have clamping hook parts.

[0021] Optionally, the heat sink has an insertion slot and an insertion head, and the insertion slot is arranged on one side of the insertion head.

[0022] Optionally, when the insulation sleeve is clamped on the heat sink, the insertion head is clamped in the clamping groove, and the plug-in part is inserted in the insertion slot.

[0023] The application further provides a frequency converter comprising the above electrical protection structure.

[0024] The electrical protection structure and the frequency converter provided by the application have the following advantages:

[0025] The electrical protection structure provided in this application includes a drive board, a control board, and a first insulating isolator. One side of the control board is the component surface, where various chips, resistors, and other electronic components are mounted. The other side of the control board is the soldering surface, where the pins and solder joints of the electronic components are located. To minimize the gap between the soldering surface and the drive board, a first insulating isolator is provided between the soldering surfaces of the drive board and the control board. The first insulating isolator has a higher breakdown voltage than air, thus ensuring electrical safety between the control board and the drive board while minimizing the gap between the soldering surface and the drive board. The first insulating isolator is specifically snapped onto a designated area of ​​the control board to form an effective barrier to the soldering surface while minimizing the space occupied between the soldering surface and the drive board. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0027] Figure 1 A three-dimensional structural diagram of the electrical protection structure provided in this application;

[0028] Figure 2 An exploded structural diagram of the electrical protection structure provided in this application;

[0029] Figure 3 Schematic diagram of the three-dimensional structure of the control panel provided in this application Figure 1 ;

[0030] Figure 4 Schematic diagram of the three-dimensional structure of the control panel provided in this application Figure 2 ;

[0031] Figure 5 for Figure 4 A magnified schematic diagram of the local structure;

[0032] Figure 6 A schematic diagram of the main structure of the control board provided in this application;

[0033] Figure 7 A three-dimensional structural schematic diagram of the second insulating insulating element provided in this application;

[0034] Figure 8 A three-dimensional structural diagram of the heat sink provided in this application;

[0035] Figure 9 A partially enlarged structural schematic diagram of the electrical protection structure provided in this application;

[0036] Figure 10 Fig. 1 is a schematic view of a partial enlarged structure of the electric protection structure of the present application; Figure 9

[0037] Figure 11 Fig. 4 is a schematic view of a perspective structure of a traditional electric protection structure.

[0038] In the drawings, the same or similar reference signs indicate the same or similar elements or elements having the same or similar functions.

[0039] 1, drive plate; 2, control plate;

[0040] 21, positioning hole; 3, first insulating spacer;

[0041] 31, positioning protrusion; 32, hook;

[0042] 33, extension; 4, heat sink;

[0043] 41, slot; 42, plug;

[0044] 5, second insulating spacer; 51, clamping groove;

[0045] 52, sleeve; 53, bolt part;

[0046] 54, hook part; 6, insulating paper. DETAILED DESCRIPTION

[0047] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0048] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0049] ​In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can include one or more of the features implicitly or explicitly.

[0050] In the present application, unless specifically defined otherwise and limited, the terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless specifically defined otherwise and limited, the terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of the present application.

[0053] In the subsequent description, the suffixes such as "circuit", "component", "assembly" or "unit" are used only for the convenience of the description of the present application, and have no specific meaning. Therefore, they can be used mixedly.

[0054] The present application will be described in further detail below with specific embodiments in conjunction with the accompanying drawings.

[0055] In the process of miniaturizing the volume of the frequency converter, it is necessary to arrange the internal electronic components in a more compact manner, thereby requiring the gap between the electronic components to be reduced to the extreme. However, under the requirements of the electrical safety related standards, the gap between the electronic components is difficult to exceed the electrical safety gap.

[0056] AsFigure 11 As shown, in order to avoid safety hazards such as short circuits, arc discharges or electric shocks caused by the close proximity of components, the traditional practice is to place insulating paper 6 in the gap between electronic components. Although it can play a certain role in insulation protection, the cost of insulating paper 6 is high, and the insulating paper material is hard and not easy to bend, making it difficult to adapt to the complex bending gaps between electronic components.

[0057] To address the issue of insufficient electrical protection performance when the gaps between electronic components within a frequency converter are smaller than the electrical safety clearances. For example... Figure 1 and Figure 2 As shown, this application provides an electrical protection structure, including a drive board 1, a control board 2, and a first insulating isolator 3.

[0058] Among them, the drive board 1 is one link in the high-voltage circuit. High-voltage is a concept relative to low-voltage. High-voltage is generally used as a power source and is characterized by high voltage and high power.

[0059] Control board 2 is one link in the electrical signal input / output circuit. Low-voltage electricity is a concept relative to high-voltage electricity; it is generally used for signal circuits and is characterized by low voltage (theoretically less than 36V) and low power. One side of control board 2 is the component side, where various chips, resistors, and other electronic components are mounted. The other side of control board 2 is the soldering side, where the pins and solder joints of each electronic component are located. The component side is positioned back-to-back with drive board 1 to keep the electronic components on the component side as far away from drive board 1 as possible, thereby protecting the electronic components on control board 2. The soldering side faces drive board 1.

[0060] To minimize the gap between the welding surface and the drive board 1, a first insulating isolator 3 is provided between the welding surfaces of the drive board 1 and the control board 2. The first insulating isolator 3 can be made of high-temperature nylon plastic material, which has a higher breakdown voltage than air. Therefore, it ensures electrical safety between the control board 2 and the drive board 1 while minimizing the gap between the welding surface and the drive board 1. The first insulating isolator 3 is specifically snapped onto a designated area of ​​the control board 2 to form an effective barrier to the welding surface while minimizing the space occupied between the welding surface and the drive board 1.

[0061] like Figure 2 and Figure 3 As shown, in one specific embodiment of this application, the first insulating isolation member 3 can specifically be an insulating cover. The insulating cover is snapped onto the control board 2, facilitating its installation on or removal from the control board 2. The control board 2 only needs to cover a designated area of ​​the welding surface to save on the amount of insulating cover required.

[0062] like Figure 6As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0063] As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved. Figure 4 Figure 5 As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0064] As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved. Figure 4 Figure 5 As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0065] As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved. Figure 4 Figure 5 As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0066] As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved. Figure 3 As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0067] As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved. Figures 7 to 10 As shown in the drawings, in one embodiment of the present application, the control board 2 is provided with contour marking lines corresponding to the contour of the insulating cover, so that when the insulating cover is clamped to the control board 2, the installation position of the insulating cover can be accurately identified, and the production identification efficiency is improved.

[0068] ​​​The heat sink 4 is in contact with the driving plate 1, so that the heat on the driving plate 1 is conducted to the heat sink 4 to reduce the temperature on the driving plate 1. Since the heat sink 4 is usually made of metal with good thermal conductivity, it also has good electrical conductivity. When the space utilization is improved and the gap between the driving plate 1 and the heat sink 4 is reduced, in order to avoid voltage breakdown between the driving plate 1 and the heat sink 4, a second insulating spacer 5 is arranged between the driving plate 1 and the heat sink 4. The second insulating spacer 5 is also made of high-temperature nylon plastic material, which has a higher breakdown voltage than air, so that the electrical safety between the driving plate 1 and the heat sink 4 can be ensured when the gap between the driving plate 1 and the heat sink 4 is as small as possible, so as to ensure the electrical safety between the driving plate 1 and the heat sink 4 and maximize the gap between the driving plate 1 and the heat sink 4, thereby improving the space utilization.

[0069] As shown in Figure 7 , in one embodiment of the present application, the second insulating spacer 5 is specifically an insulating sleeve. The insulating sleeve is arranged between the driving plate 1 and the heat sink 4, one end of the insulating sleeve abuts against the driving plate 1, and the other end of the insulating sleeve is sleeved on the heat sink 4. The insulating sleeve is sleeved at the position where the gap between the driving plate 1 and the heat sink 4 is the smallest, specifically near the contact pins of the driving plate 1 and the heat sink 4. The insulating sleeve acts as an insulating barrier between the two, preventing voltage breakdown between the contact pins of the driving plate 1 and the heat sink 4.

[0070] As shown in Figure 7 , Figure 8 and Figure 10 , in one embodiment of the present application, the insulating sleeve includes a sleeve body 52 having a clamping groove 51. The insertion end of the clamping groove 51 has a plug-in portion 53 extending in the insertion direction, and the two side walls of the clamping groove 51 also have a clamping hook portion 54; the heat sink 4 has a slot 41 and a plug 42, and the slot 41 is arranged on one side of the plug 42.

[0071] When the insulating sleeve is sleeved on the heat sink 4, the plug 42 is clamped in the clamping groove 51, and the plug-in portion 53 is inserted into the slot 41, so as to realize the connection and fixation of the insulating sleeve and the heat sink 4.

[0072] The present application also provides a frequency converter comprising the electrical protection structure in the above-mentioned embodiments, so that the frequency converter also has the advantages of the electrical protection structure in the above-mentioned embodiments.

[0073] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electrical protection structure, characterized by, The utility model relates to an electric protection structure, including: a driving plate (1); a control plate (2), one side end face is the component surface, the other side end face is the welding surface; a first insulation isolation piece (3) is arranged between the driving plate (1) and the welding surface of the control plate (2), and the first insulation isolation piece (3) is clamped on the specified area of the welding surface.

2. The electrical protection structure of claim 1, wherein, The first insulation isolation piece (3) is an insulation cover, the control plate (2) has positioning holes (21) on it, the insulation cover has positioning protrusions (31) on it, and when the insulation cover is clamped on the control plate (2), the positioning protrusions (31) are inserted into the positioning holes (21).

3. The electrical shield structure of claim 2, wherein, The insulation cover also has clamping hooks (32) on it, which are clamped on the control plate (2) to clamp the insulation cover on the control plate (2).

4. The electrical protection structure of claim 3, wherein, The number of the positioning protrusions (31) and the clamping hooks (32) is multiple, and each positioning protrusion (31) is arranged separately from each other, and each clamping hook (32) is clamped on the two side edges of the control plate (2).

5. An electrical protection structure according to any one of claims 2 to 4, wherein, The insulation cover also has an extension part (33) extending in the plane direction of the control plate (2), which is used to increase the covering area of the insulation cover.

6. An electrically protective structure as claimed in any one of claims 1 to 4, wherein, It also includes: a heat sink (4) in contact with the driving plate (1); a second insulation isolation piece (5) arranged between the driving plate (1) and the heat sink (4).

7. The electrical shield structure of claim 6, wherein, The second insulation isolation piece (5) is an insulation sleeve arranged between the driving plate (1) and the heat sink (4), one end of the insulation sleeve abuts against the driving plate (1), and the other end of the insulation sleeve is clamped on the heat sink (4).

8. The electrical shield structure of claim 7, wherein, The insulation sleeve includes a sleeve body (52) with a clamping groove (51), the insertion end of the clamping groove (51) has a plug-in part (53) extending in the insertion direction, and the two side walls of the clamping groove (51) also have clamping hook parts (54).

9. The electrical shield structure of claim 8, wherein, The heat sink (4) has an insertion slot (41) and an insertion head (42), and the insertion slot (41) is arranged on one side of the insertion head (42); When the insulation sleeve is clamped on the heat sink (4), the insertion head (42) is clamped in the clamping groove (51), and the plug-in part (53) is inserted into the insertion slot (41).

10. A frequency converter, characterized in that It includes the electric protection structure as claimed in any one of claims 1 to 9.

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