A frequency converter with an external filter

Abstract

The utility model belongs to the technical field of frequency converter, concretely is a kind of frequency converter with external filter, including frequency converter and filter, the frequency converter includes upper cover, middle shell, lower base and frequency converter main body, the upper cover is connected in the upper end of middle shell, the application installation is simple and convenient, first filter is through upper cover, lower cover and installs filter plate and is composed of filter, does not use screw, reduces material, installation and removal are simple;It does not occupy the additional space of installation cabinet, buckle guide rail cooperation installs conveniently, and the operation of disassembly press buckle is simple;It is installed in the terminal table vicinity of frequency converter, greatly shorten filter wiring distance, cost reduction;Filter is fixed together by buckle with upper cover and middle shell, increase the strength of frequency converter whole, and the screw of option can further increase strength, and filter has grid and baffle on the upper and lower, increase safety protection, prevent hand to go in and touch power supply.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, specifically to a frequency converter with an external filter. 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 main function of a filter is to reduce electromagnetic interference generated by the frequency converter and improve its stability and reliability. In order to ensure that the frequency converter can be used better, a filter is installed on the frequency converter. Filters are generally divided into built-in and external. Built-in filters are mainly installed on the PCB board inside the frequency converter. Installation and removal require removing the frequency converter casing, which is relatively difficult. External filters are connected to the RST input terminal of the frequency converter through a wiring harness, grounded at the ground terminal, and then the filter is fixed. This is the general filter wiring and installation method, which causes great inconvenience for installation and removal.

[0003] Therefore, a frequency converter with an external filter is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a frequency converter with an external filter to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a frequency converter with an external filter, comprising a frequency converter and a filter, wherein the frequency converter comprises an upper cover, a middle shell, a lower base and a frequency converter body, the upper cover is snapped onto the upper end of the middle shell, the lower base is snapped onto the lower end of the middle shell, and the frequency converter body is installed and fixed inside the upper cover, the middle shell and the lower base. The front and rear ends of the right side of the middle shell are both fixed with a first guide rail, the front and rear ends of the right side of the upper cover are both fixed with a second guide rail, the lower ends of the left and right sides of the filter are both fixed with a first elastic buckle, the upper ends of the two first elastic buckles are both fixed with a second elastic buckle, the right sides of the two second elastic buckles are both fixed with a stop block, the two first elastic buckles are engaged with the first guide rail, the two second elastic buckles are engaged with the second guide rail, a limit stop groove is formed on the upper side of the first guide rail, and the stop block is engaged with the limit stop groove.

[0006] Preferably, the upper cover has symmetrical first plastic clips fixed on its front and rear sides, the lower base has symmetrical second plastic clips fixed on its front and rear sides, the upper ends of the front and rear sides of the middle shell have first clip holes corresponding to the first plastic clips, the first plastic clips are engaged with the first clip holes, and the lower ends of the front and rear sides of the middle shell have second clip holes corresponding to the second plastic clips, the second plastic clips are engaged with the second clip holes.

[0007] Preferably, the filter includes a lower filter cover, an upper filter cover, and a filter plate. The lower filter cover is engaged with the lower end of the upper filter cover. The filter plate is fixed between the lower filter cover and the upper filter cover. The lower side of the filter plate is fixed with evenly arranged studs. The side wall of the lower filter cover is provided with a groove. The studs extend through the groove to the lower end, and the outer wall of the studs is threaded with a limit nut.

[0008] Preferably, the right side of the inverter's upper cover has a corresponding threaded hole relative to the side wall of the filter.

[0009] Preferably, a baffle is fixed to the upper side of the filter and a grid is fixed to the lower side.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This application offers simple and convenient installation. Firstly, the filter is assembled from the upper and lower covers, forming a filter plate without screws, reducing materials and simplifying installation and disassembly. It does not occupy extra space in the installation cabinet; the snap-fit ​​rails facilitate installation, and the snap-fit ​​operation is simple. Installed near the inverter's terminal block, it significantly shortens the filter wiring distance, reducing costs. The filter uses snap-fits to fix the upper cover and middle shell together, increasing the overall strength of the inverter. Optional screws can further increase strength. Furthermore, the filter features grids and baffles on the top and bottom, enhancing safety and preventing accidental contact with the power source. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the filter structure; Figure 4 This is a breakdown diagram of the filter.

[0012] In the diagram: 1 Inverter, 2 Filter, 3 Top cover, 4 Middle shell, 5 Lower base, 6 Inverter body, 7 First guide rail, 8 Second guide rail, 9 First elastic buckle, 10 Second elastic buckle, 11 Stop block, 12 First plastic clip, 13 Second plastic clip, 14 Filter lower cover, 15 Filter upper cover, 16 Filter plate, 17 Stud, 18 Limit nut, 19 Baffle, 20 Grid. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0015] Example: Please see Figure 1-4 This utility model provides a technical solution: A frequency converter with an external filter includes a frequency converter 1 and a filter 2. The frequency converter 1 includes an upper cover 3, a middle shell 4, a lower base 5 and a frequency converter body 6. The upper cover 3 is snapped onto the upper end of the middle shell 4, the lower base 5 is snapped onto the lower end of the middle shell 4, and the frequency converter body 6 is installed and fixed inside the upper cover 3, the middle shell 4 and the lower base 5. The front and rear ends of the right side of the middle shell 4 are fixed with first guide rails 7, the front and rear ends of the right side of the top cover 3 are fixed with second guide rails 8, the lower ends of the left and right sides of the filter 2 are fixed with first elastic buckles 9, the upper ends of the two first elastic buckles 9 are fixed with second elastic buckles 10, the right sides of the two second elastic buckles 10 are fixed with blocks 11, the two first elastic buckles 9 are engaged with the first guide rails 7, the two second elastic buckles 10 are engaged with the second guide rails 8, the upper side of the first guide rail 7 is provided with a limit stop groove, and the blocks 11 are engaged with the limit stop groove. The fixing method is the first elastic buckle 9 and the second elastic buckle 10, double buckle fixing, the lower buckle fixes the filter 2, and the upper buckle connects and fixes the inverter top cover 3, which can enhance the overall strength of the filter 2 and prevent the filter 2 from falling and causing parts to fall. The filter 2 is external and can be easily disassembled. The filter 2 has grids 20 on the top and bottom to prevent fingers from accidentally touching and inserting into the inverter 1 and causing damage. The upper cover 3 has symmetrical first plastic clips 12 fixed on its front and rear sides, and the lower base 5 has symmetrical second plastic clips 13 fixed on its front and rear sides. The upper ends of the front and rear sides of the middle shell 4 have first clip holes corresponding to the first plastic clips 12, and the first plastic clips 12 are engaged with the first clip holes. The lower ends of the front and rear sides of the middle shell 4 have second clip holes corresponding to the second plastic clips 13, and the second plastic clips 13 are engaged with the second clip holes.

[0016] The filter 2 includes a lower filter cover 14, an upper filter cover 15, and a filter plate 16. The lower filter cover 14 is engaged with the lower end of the upper filter cover 15. The filter plate 16 is fixed between the lower filter cover 14 and the upper filter cover 15. The lower side of the filter plate 16 is fixed with evenly arranged studs 17. The side wall of the lower filter cover 14 is provided with a groove. The studs 17 extend through the groove to the lower end, and the outer wall of the studs 17 is threaded with a limit nut 18.

[0017] The right side of the top cover 3 of the inverter 1 is provided with a threaded hole relative to the side wall of the filter 2. It can be fixed with screws and clips. If there is a stronger vibration requirement, the middle shell 4, the top cover 3 and the filter 2 can be more firmly fixed together by tightening the screws.

[0018] A baffle 19 is fixed on the upper side of the filter 2 and a grid 20 is fixed on the lower side to increase safety and prevent hands from being inserted into the inverter 1.

[0019] It should be noted that the electrical components mentioned in this utility model have had their wiring harnesses combed according to actual conditions during manufacturing, so that the wiring harnesses will not be tangled or affect the operation. All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. It should be noted that the electrical components mentioned in this utility model have been sorted according to the actual situation during manufacturing, so that the wire harness will not cause the wire harness to become tangled or affect the operation. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0020] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to 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 of this utility model.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A frequency converter with an external filter, comprising a frequency converter (1) and a filter (2), characterized in that, The inverter (1) includes an upper cover (3), a middle shell (4), a lower base (5) and an inverter body (6). The upper cover (3) is snapped onto the upper end of the middle shell (4), and the lower base (5) is snapped onto the lower end of the middle shell (4). The inverter body (6) is installed and fixed inside the upper cover (3), the middle shell (4) and the lower base (5). The front and rear ends of the right side of the middle shell (4) are fixed with a first guide rail (7), the front and rear ends of the right side of the upper cover (3) are fixed with a second guide rail (8), the lower ends of the left and right sides of the filter (2) are fixed with a first elastic buckle (9), the upper ends of the two first elastic buckles (9) are fixed with a second elastic buckle (10), the right sides of the two second elastic buckles (10) are fixed with a stop block (11), the two first elastic buckles (9) are engaged with the first guide rail (7), the two second elastic buckles (10) are engaged with the second guide rail (8), a limit stop groove is opened on the upper side of the first guide rail (7), and the stop block (11) is engaged with the limit stop groove.

2. A frequency converter with an external filter according to claim 1, characterized in that: The upper cover (3) is fixed with symmetrical first plastic clips (12) on both the front and rear sides. The lower base (5) is fixed with symmetrical second plastic clips (13) on both the front and rear sides. The upper ends of the front and rear sides of the middle shell (4) are provided with first clip holes corresponding to the first plastic clips (12). The first plastic clips (12) are engaged with the first clip holes. The lower ends of the front and rear sides of the middle shell (4) are provided with second clip holes corresponding to the second plastic clips (13). The second plastic clips (13) are engaged with the second clip holes.

3. A frequency converter with an external filter according to claim 1, characterized in that: The filter (2) includes a lower filter cover (14), an upper filter cover (15), and a filter plate (16). The lower filter cover (14) is engaged with the lower end of the upper filter cover (15). The filter plate (16) is fixed between the lower filter cover (14) and the upper filter cover (15). The lower side of the filter plate (16) is fixed with evenly arranged studs (17). The side wall of the lower filter cover (14) is provided with a groove. The studs (17) extend through the groove to the lower end, and the outer wall of the studs (17) is threaded with a limit nut (18).

4. A frequency converter with an external filter according to claim 1, characterized in that: The upper cover (3) of the inverter (1) has a corresponding threaded hole on the right side relative to the side wall of the filter (2).

5. A frequency converter with an external filter according to claim 1, characterized in that: The filter (2) has a baffle (19) fixed on its upper side and a grid (20) fixed on its lower side.

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