Frequency converter with frequency converter overcurrent protection

Abstract

The utility model provides a frequency converter with frequency converter overcurrent protection, which belongs to the technical field of frequency converters, and comprises a frequency converter assembly, a base, a shell fixedly connected to the end part of the base, a door body hinged to the side wall of the shell, and a frequency converter host fixedly connected to the interior of the shell, and the wiring assembly comprises a mounting plate fixedly connected to the side wall of the shell, an insulator fixedly connected to the side wall of the mounting plate, a main wire bar fixedly connected to the end part of the insulator, and an auxiliary wire bar adaptively mounted at the end part of the main wire bar. The beneficial effects of the utility model are that through the cooperation of the frequency converter assembly and the wiring assembly, the safety and reliability of the frequency converter are improved, and the adjustable structure of the wiring assembly enables a worker to adjust or maintain wiring more conveniently and rapidly, especially when the line current is too large, the worker can actively disconnect the connection conveniently, and the working efficiency is improved. Normal operation of a line is ensured, and the use safety of the frequency converter is improved.

Description

Technical Field

[0001] This utility model belongs to the field of frequency converter technology, specifically relating to a frequency converter with overcurrent protection. Background Technology

[0002] With the continuous improvement of industrial automation, frequency converters are playing an increasingly crucial role in electric drive systems. From intelligent manufacturing production lines to building electrical equipment, frequency converters are widely used in various fields due to their advantages such as high efficiency, energy saving, and precise speed regulation. However, in actual operation, overcurrent faults have become one of the main problems affecting the stable operation of frequency converters. Overcurrent phenomena can arise from various factors such as sudden load changes, short circuit faults, and motor stall. Once it occurs, it can not only damage the components of the frequency converter itself, but also cause the entire system to shut down, leading to production interruptions, increased equipment maintenance costs, and even safety hazards.

[0003] Traditional frequency converters have certain limitations in overcurrent protection. Some frequency converters have unreasonable wiring structures and lack effective protection measures, making them prone to loose wiring and short circuits due to external factors, which can lead to overcurrent faults. During troubleshooting and maintenance, the complex wiring makes the repair work cumbersome and time-consuming, making it difficult to quickly locate and solve problems. Utility Model Content

[0004] The purpose of this invention is to provide a frequency converter with overcurrent protection, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A frequency converter with overcurrent protection includes,

[0007] The inverter assembly includes a base, a housing fixedly connected to the end of the base, a door hinged to the side wall of the housing, and an inverter main unit fixedly connected inside the housing.

[0008] The wiring assembly includes a mounting plate fixedly connected to the side wall of the housing, an insulator fixedly connected to the side wall of the mounting plate, a main busbar fixedly connected to the end of the insulator, a secondary busbar adapted to be installed at the end of the main busbar, and an extension busbar encapsulated at the bottom of the housing. The main busbar is connected to the extension busbar through the secondary busbar, and the end of the extension busbar is connected to the terminal block of the inverter host.

[0009] As a preferred embodiment of this utility model, a cover plate is fixedly connected to the side wall of the housing, and the cover plate is snapped onto the outside of the mounting plate and the main line.

[0010] As a preferred embodiment of this utility model, a terminal block is fixedly connected to the end of the main line bus, the terminal block is disposed inside the cover plate, and the side wall of the terminal block is provided with mounting holes.

[0011] As a preferred embodiment of this utility model, a sealing sleeve is snapped onto the side wall of the base, and the end of the sealing sleeve is sleeved on the side wall of the auxiliary line bus.

[0012] As a preferred embodiment of this utility model, the wiring assembly further includes a guide rod fixedly connected inside the housing, a sliding member slidably connected to the side wall of the guide rod, an insulating plate fixedly connected to the side wall of the sliding member, and an adapter plate fixedly connected to the side wall of the insulating plate. The adapter plate is tightly inserted into the end of the main busbar, and the adapter plate is used in conjunction with the inverter host wiring terminals.

[0013] As a preferred embodiment of this utility model, the wiring assembly further includes a motor fixedly connected to the inner wall of the housing, a lead screw adapted to be installed at the end of the output shaft of the motor, and a ball nut threadedly connected to the side wall of the lead screw, wherein the side wall of the ball nut is fixedly connected to the side wall of the sliding member.

[0014] As a preferred embodiment of this utility model, a limiting plate is installed at the end of the guide rod, and the limiting plate is disposed on the outside of the sliding member.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: through the combined use of the inverter assembly and the wiring assembly, and the protective and sealing effects of the cover and sealing sleeve, it effectively prevents external objects from colliding, dust and moisture from entering the wiring area, thereby improving the safety and reliability of the inverter. The adjustable structure of the wiring assembly makes it more convenient and faster for staff to adjust or repair the wiring, especially when the line current is too high, it is convenient for staff to actively disconnect the connection to ensure the normal operation of the line and improve the safety of the inverter. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3This is a schematic cross-sectional view of section AA of the present invention;

[0020] Figure 4 This is a schematic diagram of the adapter board drive component of this utility model.

[0021] In the diagram: 100, Inverter assembly; 101, Base; 102, Housing; 103, Door; 104, Inverter main unit; 200, Wiring assembly; 201, Mounting plate; 202, Insulator; 203, Main busbar; 204, Secondary busbar; 205, Extension busbar; 206, Cover plate; 207, Terminal block; 208, Sealing sleeve; 209, Guide rod; 210, Sliding component; 211, Insulating plate; 212, Adapter plate; 213, Motor; 214, Lead screw; 215, Ball nut; 216, Limit plate. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0025] Example

[0026] Reference Figure 1-4 This is an embodiment of the present invention, which provides a frequency converter with overcurrent protection, comprising:

[0027] The inverter assembly 100 includes a base 101, a housing 102 fixedly connected to the end of the base 101, a door 103 hinged to the side wall of the housing 102, and an inverter main unit 104 fixedly connected inside the housing 102.

[0028] The wiring assembly 200 includes a mounting plate 201 fixedly connected to the side wall of the housing 102, an insulator 202 fixedly connected to the side wall of the mounting plate 201, a main line bus 203 fixedly connected to the end of the insulator 202, a secondary line bus 204 adapted to be installed at the end of the main line bus 203, and an extension line bus 205 encapsulated at the bottom of the housing 102. The main line bus 203 is connected to the extension line bus 205 through the secondary line bus 204, and the end of the extension line bus 205 is connected to the terminal block of the inverter host 104.

[0029] The inverter assembly 100 is the main body of the entire device, consisting of a base 101, a housing 102, a door 103, and the inverter main unit 104. The base 101 provides stable support for the entire inverter, ensuring that the equipment will not be affected by vibration or displacement during operation. The housing 102 is fixedly connected to the end of the base 101, forming a closed space to protect the internal inverter main unit 104 from external dust, moisture, and other impurities. The door 103 is hinged to the side wall of the housing 102, facilitating inspection and maintenance of the inverter main unit 104. The inverter main unit 104 is fixedly connected inside the housing 102 and is the core component for realizing the frequency conversion function, converting fixed-frequency power to variable-frequency power to meet the needs of different loads. The mounting plate 201 is fixedly connected to the side wall of the housing 102, providing a mounting base for the insulator 202. Insulator 202 is fixedly connected to the side wall of mounting plate 201, serving as electrical insulation to ensure no leakage current occurs between main line bus 203 and mounting plate 201. Main line bus 203 is fixedly connected to the end of insulator 202 and is the main channel for power transmission. Auxiliary line bus 204 is adapted and installed at the end of main line bus 203 to connect main line bus 203 and extension line bus 205. Extension line bus 205 is encapsulated at the bottom of housing 102, and its end connects to the terminal block of inverter host 104 to introduce external power into inverter host 104.

[0030] Specifically, a cover plate 206 is fixedly connected to the side wall of the housing 102. The cover plate 206 is snapped onto the outside of the mounting plate 201 and the main line bus 203. A terminal block 207 is fixedly connected to the end of the main line bus 203. The terminal block 207 is located inside the cover plate 206, and the side wall of the terminal block 207 has a mounting hole. A sealing sleeve 208 is snapped onto the side wall of the base 101. The end of the sealing sleeve 208 is sleeved on the side wall of the auxiliary line bus 204.

[0031] The cover plate 206 is fixedly connected to the side wall of the housing 102 and snaps onto the outside of the mounting plate 201 and the main cable bus 203, serving a protective function to prevent external objects from colliding with or accidentally touching the main cable bus 203, and also to prevent dust, moisture, etc. from entering the wiring area. The terminal block 207 is fixedly connected to the end of the main cable bus 203 and is located inside the cover plate 206. Its side wall has mounting holes for easy connection to external circuits. The sealing sleeve 208 snaps onto the side wall of the base 101 and its end is sleeved on the side wall of the auxiliary cable bus 204, serving a sealing function to prevent moisture, dust, etc. from entering the equipment from the connection between the base 101 and the auxiliary cable bus 204.

[0032] Preferably, the wiring assembly 200 further includes a guide rod 209 fixedly connected inside the housing 102, a sliding member 210 slidably connected to the side wall of the guide rod 209, an insulating plate 211 fixedly connected to the side wall of the sliding member 210, and an adapter plate 212 fixedly connected to the side wall of the insulating plate 211. The adapter plate 212 is tightly inserted into the end of the main busbar 203, and the adapter plate 212 is used in conjunction with the wiring terminals of the inverter host 104. The wiring assembly 200 also includes a motor 213 fixedly connected to the inner wall of the housing 102, a lead screw 214 adapted to be installed at the end of the output shaft of the motor 213, and a ball nut 215 threadedly connected to the side wall of the lead screw 214. The side wall of the ball nut 215 is fixedly connected to the side wall of the sliding member 210. A limit plate 216 is installed at the end of the guide rod 209, and the limit plate 216 is located on the outside of the sliding member 210.

[0033] The guide rod 209 is fixedly connected inside the housing 102, providing a sliding track for the sliding member 210. The sliding member 210 is slidably connected to the side wall of the guide rod 209, allowing it to slide freely on the guide rod 209. The insulating plate 211 is fixedly connected to the side wall of the sliding member 210, providing electrical insulation. The adapter plate 212 is fixedly connected to the side wall of the insulating plate 211, tightly inserted into the end of the main line bus 203, and used in conjunction with the wiring terminals of the inverter host 104 to realize power transmission and distribution. The motor 213 is fixedly connected to the inner wall of the housing 102, and a lead screw 214 is fitted to the end of its output shaft. The lead screw 214 is threadedly connected to a ball nut 215, and the side wall of the ball nut 215 is fixedly connected to the side wall of the sliding member 210. When motor 213 rotates, it drives lead screw 214 to rotate, causing ball nut 215 to move linearly on lead screw 214. This, in turn, causes slider 210 to slide on guide rod 209, thereby adjusting the position of adapter plate 212. Limiting plate 216 is installed at the end of guide rod 209 and is located outside slider 210. It is used to limit the sliding range of slider 210 and prevent slider 210 from sliding off guide rod 209.

[0034] During operation, when the frequency converter is working normally, external power is introduced into the frequency converter host 104 through the main line bus 203, auxiliary line bus 204, and extension line bus 205. The frequency converter host 104 converts the fixed-frequency power to a variable-frequency power, providing appropriate power to the load. During this process, the cover plate 206 and sealing sleeve 208 provide protection and sealing, ensuring the safety and stability of the wiring area. When wiring adjustments or maintenance are required, the motor 213 starts, driving the lead screw 214 to rotate, causing the ball nut 215 to move linearly on the lead screw 214, thereby causing the sliding member 210 to slide on the guide rod 209. The sliding of the sliding member 210 causes the insulating plate 211 and the adapter plate 212 to move together, realizing the separation or connection of the adapter plate 212 with the main line bus 203 and the wiring terminals of the frequency converter host 104. This facilitates operation by actively disconnecting the connection when the line current is too high. The limit plate 216 restricts the sliding range of the sliding member 210, ensuring operational safety.

[0035] In summary, the protective and sealing functions of the cover plate 206 and the sealing sleeve 208 effectively prevent external objects from colliding with the wiring area, and dust and moisture from entering, thus improving the safety and reliability of the frequency converter and reducing the failure rate caused by external factors. The adjustable structure of the wiring assembly 200 makes it more convenient and faster for operators to adjust or maintain the wiring. The position adjustment of the adapter plate 212 is achieved by the motor 213 driving the lead screw 214 to rotate, avoiding the tedious process of manually disassembling and connecting lines required in traditional wiring methods, and improving maintenance efficiency. The insulator 202 and the insulating plate 211 effectively ensure electrical insulation performance, prevent leakage, and improve the safety of the frequency converter.

[0036] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0038] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A frequency converter with overcurrent protection, characterized in that: include, The inverter assembly (100) includes a base (101), a housing (102) fixedly connected to the end of the base (101), a door (103) hinged to the side wall of the housing (102), and an inverter host (104) fixedly connected inside the housing (102). The wiring assembly (200) includes a mounting plate (201) fixedly connected to the side wall of the housing (102), an insulator (202) fixedly connected to the side wall of the mounting plate (201), a main busbar (203) fixedly connected to the end of the insulator (202), a secondary busbar (204) adapted to be installed at the end of the main busbar (203), and an extension busbar (205) encapsulated at the bottom of the housing (102). The main busbar (203) is connected to the extension busbar (205) through the secondary busbar (204), and the end of the extension busbar (205) is connected to the terminal block of the inverter host (104).

2. A frequency converter with overcurrent protection according to claim 1, characterized in that: The housing (102) has a cover plate (206) fixedly connected to its side wall. The cover plate (206) is snapped onto the outside of the mounting plate (201) and the main line (203).

3. A frequency converter with overcurrent protection according to claim 2, characterized in that: The main line (203) is fixedly connected to a terminal block (207) at its end. The terminal block (207) is located inside the cover plate (206), and the side wall of the terminal block (207) is provided with mounting holes.

4. A frequency converter with overcurrent protection according to claim 3, characterized in that: The base (101) has a sealing sleeve (208) snapped into its side wall, and the end of the sealing sleeve (208) is sleeved on the side wall of the sub-line (204).

5. A frequency converter with overcurrent protection according to claim 4, characterized in that: The wiring assembly (200) further includes a guide rod (209) fixedly connected inside the housing (102), a sliding member (210) slidably connected to the side wall of the guide rod (209), an insulating plate (211) fixedly connected to the side wall of the sliding member (210), and an adapter plate (212) fixedly connected to the side wall of the insulating plate (211). The adapter plate (212) is tightly inserted into the end of the main line bus (203), and the adapter plate (212) is used in conjunction with the wiring terminals of the inverter host (104).

6. A frequency converter with overcurrent protection according to claim 5, characterized in that: The wiring assembly (200) also includes a motor (213) fixedly connected to the inner wall of the housing (102), a lead screw (214) adapted to be installed at the end of the output shaft of the motor (213), and a ball nut (215) threadedly connected to the side wall of the lead screw (214), the side wall of the ball nut (215) being fixedly connected to the side wall of the sliding member (210).

7. A frequency converter with overcurrent protection according to claim 6, characterized in that: A limiting plate (216) is installed at the end of the guide rod (209), and the limiting plate (216) is located on the outside of the sliding member (210).

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