Variable frequency drive (VFD) units, VFDs, and industrial control equipment

Abstract

This application relates to a frequency converter unit, a frequency converter, and industrial control equipment. The frequency converter unit includes: a capacitor body, a bottom shell, a signal connector, and a cable connection assembly. The capacitor body includes an upper shell and a capacitor. The capacitor is disposed inside the upper shell, and a cavity is formed between the capacitor and the upper shell. The bottom shell has a mounting cavity. The bottom shell is detachably connected to the bottom of the upper shell. The signal connector is disposed on the upper shell and is positioned corresponding to the cavity. The cable connection assembly is disposed on the bottom shell and is positioned corresponding to the mounting cavity. The signal connector and the cable connection assembly are located on the same side of the outer shell. This utility model has the advantage of solving the problem of signal lines and output cables crossing and overlapping, and reducing the failure rate of the frequency converter.

Description

Technical Field

[0001] This application relates to the field of frequency converter unit technology, and in particular to a frequency converter unit, a frequency converter, and industrial control equipment. Background Technology

[0002] A frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control an AC motor by changing the frequency of the motor's power supply. The frequency converter unit is an important component of the frequency converter. Due to the influence of manufacturing processes, at least three frequency converter units are currently required to assemble a complete frequency converter.

[0003] To minimize the installation space occupied by the frequency converter, related technologies often place the signal lines and output cables connecting the frequency converter unit on the same side. However, because the capacitors in the frequency converter unit are relatively large and occupy most of the unit's space, the signal lines and output cables can only be installed in a small remaining area. The close spacing between the signal lines and output cables leads to overlapping and crossing. During operation, this structure makes the output cables prone to interfering with the signal transmission of the signal lines, increasing the machine's failure rate. Utility Model Content

[0004] This application provides a frequency converter unit and a frequency converter to solve the problem of signal lines being susceptible to interference.

[0005] In a first aspect, this application provides a frequency converter unit, comprising:

[0006] A capacitor body includes an upper shell and a capacitor; the capacitor is disposed inside the upper shell, and a cavity is formed between the capacitor and the upper shell.

[0007] The bottom shell has a mounting cavity; the bottom shell is detachably connected to the bottom of the upper shell;

[0008] A signal connector is located on the upper shell and is provided corresponding to the cavity;

[0009] A cable connection assembly is disposed on the bottom shell and corresponding to the mounting cavity; the signal connector and the cable connection assembly are located on the same side of the outer shell.

[0010] Furthermore, a hollow portion is provided on one side of the capacitor, and the cavity is formed by the hollow portion.

[0011] Furthermore, the upper shell includes:

[0012] A notch; the notch is located in the upper shell and communicates with the cavity;

[0013] A cover plate is detachably connected to the notch; the signal connector is detachably connected to the cover plate;

[0014] A connecting part is provided at the bottom of the upper shell; the connecting part is connected to the bottom shell.

[0015] Furthermore, the cover plate includes:

[0016] A mounting plate is provided on the upper shell on the same side as the notch; the top of the mounting plate is flush with the top surface of the upper shell; the signal connector passes through the mounting plate.

[0017] A lifting part is provided at the bottom of the mounting plate and abuts against the bottom of the mounting plate; the bottom of the lifting part is flush with the bottom of the upper shell.

[0018] Furthermore, the mounting cavity is provided with an electrical component body, which includes a unit module group and a connector. The unit module group is located in the mounting cavity; the connector is located in the cavity; one end of the connector is connected to the signal connector, and the other end is connected to the unit module group.

[0019] Furthermore, the signal connector includes:

[0020] The connector body has an input end and an output end; the output end passes through the mounting plate and extends into the cavity; the input end protrudes from the connecting portion;

[0021] A signal board is connected to the output terminal; one end of the connector is connected to the signal board, and the other end is connected to the motherboard.

[0022] Furthermore, the cable connection assembly includes:

[0023] The conductive part has one end inserted through the bottom shell and extends into the mounting cavity, and the other end protrudes from the bottom shell. The end of the conductive part located in the mounting cavity is connected to the unit module group.

[0024] A clamping part is provided at one end of the conductive part that protrudes from the bottom shell, and is used to abut the cable against the conductive part.

[0025] Secondly, this application provides a frequency converter, comprising:

[0026] Any of the frequency converter units described above; multiple frequency converter units are connected in sequence.

[0027] Thirdly, this application provides an industrial control device, including: a frequency converter as described above, wherein the frequency converter is disposed within the industrial control device.

[0028] The technical solution provided in this application has the following advantages compared with the prior art:

[0029] In the technical solution of this application, all electrical components of the inverter unit are installed inside the upper and lower shells. The upper and lower shells provide dust and pressure protection, increasing the service life of the inverter unit. When the casing is divided into an upper shell and a lower shell, the upper and lower shells are detachably connected, facilitating quick assembly and disassembly of the inverter unit. The mounting cavity provides installation space for the remaining electrical components of the inverter unit, allowing all electrical components to be installed inside the casing, thus enabling the casing to provide dust and pressure protection. When the capacitor is installed inside the upper shell, a cavity is formed between the capacitor and the upper shell. This cavity provides installation space for the signal connector to be installed on the upper shell. Then, the cable connection assembly is installed on the lower shell. This increases the spacing between the signal connector and the cable connection assembly, solving the problem of signal lines and output cables crossing and overlapping, and reducing the inverter's failure rate. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0033] Figure 1 This is a schematic diagram of the structure of a frequency converter unit provided in an embodiment of this application;

[0034] Figure 2 for Figure 1 The diagram shows a structural schematic from a cross-sectional perspective.

[0035] Figure 3 for Figure 1 The diagram shows a structural design from an explosion perspective;

[0036] Figure 4 for Figure 1 The diagram shown is a structural schematic of the part not connected to the bottom shell.

[0037] Figure 5 for Figure 4 The diagram shows a structural schematic from the perspective of an explosion.

[0038] Explanation of reference numerals in the attached figures:

[0039] The components include: capacitor body 100, upper shell 1, cavity 10a, notch 11a, cover plate 12, mounting plate 120, lifting part 121, connecting part 13, abutting plate 130, connecting plate 131, capacitor 2, bottom shell 3, mounting cavity 30a, signal connector 4, connector body 40, signal board 41, cable connection assembly 5, conductive part 50, clamping part 51, electrical component body 6, unit module group 60, and connector 61. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0042] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0043] To address the technical problem that signal lines are susceptible to interference from cables in existing technologies, this application provides a frequency converter unit that can reduce the failure rate of the frequency converter.

[0044] Firstly, Figures 1 to 5 An inverter unit provided in this application embodiment includes: a capacitor body 100, a bottom shell 3, a signal connector 4, and a cable connection assembly 5; the capacitor body 100 includes an upper shell 1 and a capacitor 2; the capacitor 2 is disposed inside the upper shell 1, and a cavity 10a is formed between the capacitor 2 and the upper shell 1; the bottom shell 3 has a mounting cavity 30a; the bottom shell 3 is detachably connected to the bottom of the upper shell 1; the signal connector 4 is disposed on the upper shell 1 and is disposed corresponding to the cavity 10a; the cable connection assembly 5 is disposed on the bottom shell 3 and is disposed corresponding to the mounting cavity 30a; the signal connector 4 and the cable connection assembly 5 are located on the same side of the outer shell.

[0045] Understandably, in this design, all electrical components of the inverter unit are installed inside the upper and lower housings. The upper and lower housings provide dust and pressure protection, increasing the lifespan of the inverter unit. When the housing is divided into upper housing 1 and lower housing 3, they are detachably connected, facilitating quick assembly and disassembly of the inverter unit. The mounting cavity 30a provides installation space for the remaining electrical components of the inverter unit, allowing all electrical components to be installed inside the housing, thus providing dust and pressure protection. When capacitor 2 is installed inside upper housing 1, a cavity 10a is formed between capacitor 2 and upper housing 1. This cavity 10a provides installation space for signal connector 4 to be installed on upper housing 1. Then, cable connection assembly 5 is installed on lower housing 3. This increases the distance between signal connector 4 and cable connection assembly 5, solving the problem of signal lines and output cables crossing and overlapping, and reducing the inverter's failure rate.

[0046] It should be noted that the installation positions of the signal connector 4 and the cable connection assembly 5 can be interchanged according to actual usage requirements. That is, the cable connection assembly 5 is installed at the position corresponding to the cavity 10a in the upper shell 1, and the signal connector 4 is installed at the position corresponding to the mounting cavity 30a in the bottom shell 3.

[0047] like Figures 1 to 5 As shown, in the technical solution of this embodiment, a hollow part is provided on one side of the capacitor 2, and the cavity 10a is formed by the hollow part.

[0048] It is understandable that the hollow part can be formed by cutting off a portion of the tail of the capacitor 2; or by installing the capacitor 2, which is smaller than the internal space of the upper shell 1, inside the upper shell 1; or by placing a shell larger than the capacitor body 100 on the outside of the capacitor body 100, etc. In this way, a cavity 10a for the signal connector 4 to be installed is created between the capacitor 2 and the shell, so as to increase the distance between the signal connector 4 and the cable connection assembly 5.

[0049] like Figures 1 to 5 As shown, in the technical solution of this embodiment, the upper shell 1 includes a notch 11a, a cover plate 12 and a connecting part 13; the notch 11a is provided on the upper shell 1 and communicates with the cavity 10a3; the cover plate 12 is detachably connected to the notch 11a; the signal connector 4 is detachably connected to the cover plate 12; the connecting part 13 is provided at the bottom of the upper shell 1; the connecting part 13 is connected to the bottom shell 3.

[0050] Understandably, the notch 11a allows for easy installation and removal of capacitor 2 from the housing. When capacitor 2 needs to be replaced, it can be quickly removed from the housing via the notch 11a. The cover 12 keeps the interior of the housing closed without affecting the installation and removal of capacitor 2. The connecting part 13 serves to connect and install with the bottom shell 3.

[0051] like Figures 1 to 5 As shown, in the technical solution of this embodiment, the cover plate 12 includes: a mounting plate 120 and a lifting part 121. The mounting plate 120 is disposed on the upper shell 1 on the side of the notch 11a; one side of the mounting plate 120 is flush with the top surface of the upper shell 1; the lifting part 121 is disposed on the upper shell 1 on the side of the notch 11a; one side of the lifting part 121 abuts against the side of the mounting plate 120 away from the top surface of the upper shell 1, and the other side is flush with the bottom of the upper shell 1.

[0052] It is understandable that the mounting plate 120 and the lifting part 121 are both detachably connected at the notch 11a. Since the signal connector 4 is mounted on the mounting plate 120, when it is necessary to replace the signal connector 4, the mounting plate 120 can be removed separately to replace the signal connector 4 completely. The structure is simple and the disassembly is convenient. The lifting part 121 is located between the signal connector 4 and the cable connection assembly 5, which can further increase the gap between the signal connector 4 and the cable connection assembly 5. Since it is located in the middle of the side of the housing, the lifting part 121 can better bear the force.

[0053] like Figure 4 and Figure 5As shown, in the technical solution of this embodiment, the connecting part 13 includes an abutment plate 130 and a connecting plate 131; one end of the abutment plate 130 is connected to the bottom of the upper shell 1, and the other end extends toward the cavity 10a; the abutment plate 130 is parallel to the top surface of the upper shell 1; the bottom of the capacitor 2 abuts against the abutment part; one end of the connecting plate 131 is connected to the end of the abutment plate 130 away from the upper shell 1, and the other end extends in the direction away from the upper shell 1 and is perpendicular to the abutment plate 130.

[0054] It is understandable that capacitor 2 is embedded in the outer shell 1, and the abutment plate 130 can be used to prevent capacitor 2 from falling into the mounting cavity 30a due to its own weight; the connecting plate 131 can also be used to connect with the bottom shell 3. When the upper shell 1 and the bottom shell 3 need to be assembled together, the connecting plate 131 fits against the cavity wall of the mounting cavity 30a of the bottom shell 3. At this time, only bolts are needed to assemble the upper shell 1 and the bottom shell 3 together.

[0055] like Figure 2 and Figure 3 As shown, in the technical solution of this embodiment, an electrical component body 6 is provided in the mounting cavity 30a. The electrical component body 6 includes a unit module group 60 and a connector 61. The unit module group 60 is located in the mounting cavity 30a; the connector 61 is located in the cavity 10a; one end of the connector 61 is connected to the signal connector 4, and the other end is connected to the unit module group 60.

[0056] It is understandable that the unit module group 60 is consistent with the unit module in the prior art in terms of function and structure, and is an indispensable part of the frequency converter unit. The unit module group 60 set in the mounting cavity 30a can reduce the ingress of dust. The connector 61 has the same function as the electrical connection wire. When the signal connector 4 is connected to the external signal line, the signal transmitted by the external signal line is transmitted to the unit module group 60 through the signal connector 4 and the connector 61.

[0057] like Figures 1 to 5 As shown, in the technical solution of this embodiment, the signal connector 4 includes: a connector body 40 and a signal board 41. The connector body 40 has an input end and an output end; the output end passes through the mounting plate 120 and extends into the cavity 10a; the input end protrudes from the connecting part 13; the signal board 41 is connected to the output end; one end of the connector 61 is connected to the signal board 41, and the other end is connected to the motherboard.

[0058] It is understandable that the mounting plate 120 has a through hole, and the connector body 40 passes through the through hole onto the mounting plate 120. The input end is connected to the external signal line, and the output end is connected to the motherboard. The motherboard can process the signals transmitted from the external signal line, and the processed signals are transmitted to the unit module group 60 by the connector 61.

[0059] like Figures 1 to 5As shown, in the technical solution of this embodiment, the cable connection assembly 5 includes: a conductive part 50 and a clamping part 51; one end of the conductive part 50 passes through the bottom shell 3 and extends into the mounting cavity 30a, and the other end protrudes from the bottom shell 3, and the end of the conductive part 50 located in the mounting cavity 30a is connected to the unit module group 604; the clamping part 51 is provided at the end of the conductive part 50 that protrudes from the bottom shell 3, and is used to abut the cable against the conductive part 50.

[0060] Understandably, when it is necessary to connect an external cable, the output end of the external cable can be pressed against the conductive part 50 by the clamping part 51, and the external cable can then supply power to the inverter unit.

[0061] Secondly, this application also provides a frequency converter, including any of the frequency converter units described above. The specific structure of the frequency converter unit is as described in the above embodiments. Since this second subject matter adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. Multiple frequency converter units are connected sequentially.

[0062] Thirdly, this application also provides an industrial control device, including the frequency converter as described above. The specific structure of the industrial control device is as described in the above embodiments. Since this third aspect adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. The frequency converter is located within the industrial control device.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this application, "multiple" means two or more, unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0069] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0070] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A frequency converter unit, characterized in that include: The capacitor body (100) includes an upper shell (1) and a capacitor (2); the capacitor (2) is disposed inside the upper shell (1), and a cavity (10a) is formed between the capacitor (2) and the upper shell (1); The bottom shell (3) has a mounting cavity (30a); the bottom shell (3) is detachably connected to the bottom of the upper shell (1); A signal connector (4) is provided on the upper shell (1) and is provided corresponding to the cavity (10a); A cable connection assembly (5) is disposed on the bottom shell (3) and corresponding to the mounting cavity (30a); the signal connector (4) and the cable connection assembly (5) are located on the same side of the housing, which includes an upper shell (1) and a bottom shell (3).

2. The frequency converter unit of claim 1, wherein, The capacitor (2) has a hollow part on one side, and the cavity (10a) is formed by the hollow part.

3. The frequency converter unit according to claim 2, characterized in that, The upper shell (1) includes: A notch (11a) is provided on the upper shell (1) and communicates with the cavity (10a); A cover plate (12) is detachably connected to the notch (11a); the signal connector (4) is detachably connected to the cover plate (12); A connecting part (13) is provided at the bottom of the upper shell (1); the connecting part (13) is connected to the bottom shell (3).

4. The frequency converter unit of claim 3, wherein, The cover plate (12) includes: Mounting plate (120) is provided on the upper shell (1) on the same side as the notch (11a); the top of mounting plate (120) is flush with the top surface of upper shell (1); signal connector (4) passes through mounting plate (120); A lifting part (121) is provided at the bottom of the mounting plate (120) and abuts against the bottom of the mounting plate (120); the bottom of the lifting part (121) is flush with the bottom of the upper shell (1).

5. The frequency converter unit of claim 4, wherein, The mounting cavity (30a) is provided with an electrical component body (6), which includes a unit module group (60) and a connector (61). The unit module group (60) is located in the mounting cavity (30a); the connector (61) is located in the cavity (10a); one end of the connector (61) is connected to the signal connector (4), and the other end is connected to the unit module group (60).

6. The frequency converter unit of claim 5, wherein, The signal connector (4) includes: The connector body (40) has an input end and an output end; the output end passes through the mounting plate (120) and extends into the cavity (10a); the input end protrudes from the connecting part (13); The signal board (41) is connected to the output terminal; one end of the connector (61) is connected to the signal board (41), and the other end is connected to the motherboard.

7. The frequency converter unit of claim 5, wherein, The cable connection assembly (5) includes: The conductive part (50) has one end inserted through the bottom shell (3) and extends into the mounting cavity (30a), and the other end protrudes from the bottom shell (3). The end of the conductive part (50) located in the mounting cavity (30a) is connected to the unit module group (60). A clamping part (51) is provided on one end of the conductive part (50) that protrudes from the bottom shell (3) and is used to abut the cable against the conductive part (50).

8. A frequency converter, characterized in that include: Multiple frequency converter units as described in any one of claims 1-7; the multiple frequency converter units are connected in sequence.

9. An industrial control device, characterized by comprising: include: The frequency converter of claim 8 is located within an industrial control device.

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