Vertical winding self-cooling passive filter

Abstract

The utility model discloses a vertically-wound self-cooled passive filter, which is characterized in that the vertically-wound self-cooled passive filter comprises a shell, the inner wall of the bottom of the shell is fixedly connected with a filtering structure and a capacitor, and the outer wall of the shell is fixedly connected with a contactor; the utility model relates to the technical field of passive filters, the filtering structure adopts a vertical winding mode of an insulated wire, forms a vertical air channel, is matched with the design of a heat dissipation groove, realizes high-efficiency heat dissipation by utilizing natural air convection, and ensures that a reactor is always in a normal working temperature range due to good heat dissipation performance, so that the service life of the reactor is prolonged. And through the vertical winding structure, on the premise that the same filtering effect is achieved, the size and the occupied area of the filter are greatly reduced, the filter structure is more compact, equipment installation and layout are facilitated, and the space utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of passive filter technology, specifically a vertically wound self-cooled passive filter. Background Technology

[0002] In modern power systems, passive filters are key devices for improving power quality and are widely used in industrial, commercial and residential fields. By suppressing harmonic currents and performing reactive power compensation, they can effectively improve the stability of the power system and the efficiency of power use, and ensure the safe operation of electrical equipment.

[0003] However, traditional passive filters have some shortcomings. The heat dissipation of reactors usually relies on additional heat dissipation equipment such as fans, which increases the operating cost and maintenance difficulty of the equipment. Moreover, traditional reactor windings mostly adopt a horizontal winding method. This structure results in the filter being large in size and occupying a large area. In installation environments with limited space, it is difficult to make reasonable layout, which limits the application scenarios of the filter and reduces space utilization. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a vertically wound self-cooled passive filter, which solves the problem that traditional reactor windings are horizontally wound, resulting in filters that are large in size and occupy a large area, making it difficult to arrange them reasonably in installation environments with limited space.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A self-cooled, vertically wound passive filter, characterized in that it comprises: a housing, wherein a filter structure and a capacitor are fixedly connected to the inner wall of the bottom of the housing, and a contactor is fixedly connected to the outer wall of the housing; the filter structure includes a reactor, wherein a heat dissipation groove is formed on the outer wall of the reactor, a mounting base plate is fixedly connected to the outer wall of the bottom of the reactor by bolts, a protective plate is fixedly connected to the outer wall of the top of the reactor by bolts, and an insulated wire is fixedly connected to the outer wall of the reactor.

[0009] Preferably, the insulated wire is vertically wound and fixed to the outside of the reactor. The reactor winding adopts a vertical winding method, with multiple layers of insulated wire arranged vertically. This unique structure creates a vertical air duct inside the reactor. When the reactor generates heat during operation, the surrounding air is heated and rises, forming natural air convection. External cold air is continuously replenished through the vertical air duct, thereby carrying away the heat generated by the reactor.

[0010] Preferably, the outer wall of the mounting base plate is fixedly connected to the inner wall of the bottom of the housing by bolts, and the filter structure is fixedly connected to the housing by the mounting base plate.

[0011] Preferably, the inner wall of the contactor is fixedly connected with a connecting ribbon cable, a capacitor ribbon cable, and a shorting ribbon cable.

[0012] Preferably, the outer wall of the connecting cable and the shorting cable on the side away from the contactor is fixedly connected to the outer wall of the insulated wire, and the outer wall of the capacitor cable on the side away from the contactor is fixedly connected to the outer wall of the capacitor. The current is transmitted to the insulated wire through the connecting cable of the contactor. The reactor has different impedance characteristics for currents of different frequencies, which can effectively suppress harmonic currents of specific frequencies and filter the current. The current after being filtered by the reactor is transmitted to the capacitor through the capacitor cable. The capacitor further performs reactive power compensation and filtering on the current to improve the current quality. Then, the current processed by the capacitor is output through the shorting cable via the contactor, thereby obtaining the required current and realizing the filtering function.

[0013] (III) Beneficial Effects

[0014] This invention provides a vertically wound, self-cooled passive filter. It has the following advantages:

[0015] (i) This reactor uses insulated wires to be wound vertically to form a vertical air duct. Combined with the heat dissipation slot design, it utilizes natural air convection to achieve efficient heat dissipation. No additional heat dissipation equipment is required, which reduces operating costs and maintenance difficulty. At the same time, the good heat dissipation performance ensures that the reactor is always within the normal operating temperature range, avoiding performance degradation or equipment damage due to overheating, which greatly improves the reliability and service life of the filter.

[0016] (II) This filter structure, through vertical winding, significantly reduces the size and footprint of the filter while achieving the same filtering effect as the traditional horizontal winding method, making the filter structure more compact. This design advantage is particularly prominent in installation environments with limited space, which facilitates equipment installation layout, improves space utilization, and provides greater flexibility and convenience for engineering applications. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the capacitor of this utility model;

[0020] Figure 4This is a schematic diagram of the filter structure of this utility model.

[0021] In the diagram: 1. Housing; 2. Filter structure; 21. Reactor; 22. Heat sink; 23. Mounting base plate; 24. Protective plate; 25. Insulated wire; 4. Contactor; 41. Connecting cable; 42. Capacitor cable; 43. Shorting cable; 5. Capacitor. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a vertically wound self-cooled passive filter, characterized in that it includes: a housing 1, a filter structure 2 and a capacitor 5 are fixedly connected to the inner wall of the bottom of the housing 1, and a contactor 4 is fixedly connected to the outer wall of the housing 1; the filter structure 2 includes a reactor 21, a heat dissipation groove 22 is opened on the outer wall of the reactor 21, a mounting base plate 23 is fixedly connected to the outer wall of the bottom of the reactor 21 by bolts, a protective plate 24 is fixedly connected to the outer wall of the top of the reactor 21 by bolts, and an insulated wire 25 is fixedly connected to the outer wall of the reactor 21.

[0024] The insulated wire 25 is vertically wound and fixed to the outside of the reactor 21. The winding of the reactor 21 adopts a vertical winding method, and the multi-layer insulated wire 25 is arranged vertically. This unique structure makes a vertical air channel form inside the reactor 21. When the reactor 21 generates heat during operation, the surrounding air is heated and rises, forming natural air convection. External cold air is continuously replenished through the vertical air channel, thereby carrying away the heat generated by the reactor 21.

[0025] The outer wall of the mounting base plate 23 is fixedly connected to the inner wall of the bottom of the housing 1 by bolts, and the filter structure 2 is fixedly connected to the housing 1 by the mounting base plate 23.

[0026] The inner wall of the contactor 4 is fixedly connected with a connecting cable 41, a capacitor cable 42, and a shorting cable 43.

[0027] The outer wall of the connecting cable 41 and the shorting cable 43 on the side away from the contactor 4 is fixedly connected to the outer wall of the insulated wire 25. The outer wall of the capacitor cable 42 on the side away from the contactor 4 is fixedly connected to the outer wall of the capacitor 5. The current is transmitted to the insulated wire 25 through the connecting cable 41 of the contactor 4. The reactor 21 has different impedance characteristics for currents of different frequencies, which can effectively suppress harmonic currents of specific frequencies and filter the current. The current after being filtered by the reactor 21 is transmitted to the capacitor 5 through the capacitor cable 42. The capacitor 5 further performs reactive power compensation and filtering on the current to improve the current quality. Then, the current processed by the capacitor 5 is output through the shorting cable 43 to the contactor 4, thereby obtaining the required current and realizing the filtering function.

[0028] In use, the housing 1 protects and connects the internal filter structure 2, capacitor 5, and external contactor 4. The filter structure 2 is fixedly connected to the housing 1 via a mounting base plate 23. Meanwhile, the protective plate 24 on the filter structure 2 connects to and protects the reactor 21.

[0029] During the filtering process, when the current is input into the filter, it is transmitted to the insulated wire 25 through the connecting cable 41 of the contactor 4. The insulated wire 25 is vertically wound and fixed to the outside of the reactor 21. At this time, the reactor 21 begins to function. The reactor 21 has different impedance characteristics for currents of different frequencies, which can effectively suppress harmonic currents of specific frequencies and filter the current. The current after being filtered by the reactor 21 is transmitted to the capacitor 5 through the capacitor cable 42. The capacitor 5 further performs reactive power compensation and filtering on the current to improve the current quality. After that, the current processed by the capacitor 5 is output through the short-circuit cable 43 via the contactor 4, thereby obtaining the required current and realizing the filtering function.

[0030] In terms of heat dissipation, the winding of reactor 21 adopts a vertical winding method, with multiple layers of insulated wires 25 arranged vertically. This unique structure creates a vertical airflow channel inside reactor 21. When reactor 21 generates heat during operation, the surrounding air is heated and rises, forming natural air convection. External cold air is continuously replenished through the vertical airflow channel, thereby carrying away the heat generated by reactor 21. The setting of heat dissipation slots 22 further increases the heat dissipation area of ​​reactor 21, accelerates the heat dissipation speed, ensures that reactor 21 operates within the normal temperature range, and ensures the stable operation of the filter. At the same time, compared with the horizontal winding method, the vertical winding method effectively reduces the size and footprint of the filter while achieving the same filtering effect, making the filter structure more compact and easier to install and use.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] 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 vertically wound, self-cooled passive filter, characterized in that, include: A housing (1) has a filter structure (2) and a capacitor (5) fixedly connected to the inner wall of the bottom of the housing (1), and a contactor (4) fixedly connected to the outer wall of the housing (1). The filter structure (2) includes a reactor (21), the outer wall of the reactor (21) is provided with a heat dissipation groove (22), the bottom outer wall of the reactor (21) is fixedly connected to a mounting base plate (23) by bolts, the top outer wall of the reactor (21) is fixedly connected to a protective plate (24) by bolts, and the outer wall of the reactor (21) is fixedly connected to an insulated wire (25).

2. The self-cooled, vertically wound passive filter according to claim 1, characterized in that: The insulated wire (25) is vertically wound and fixed to the outside of the reactor (21).

3. The self-cooled, vertically wound passive filter according to claim 1, characterized in that: The outer wall of the mounting base plate (23) is fixedly connected to the inner wall of the bottom of the housing (1) by bolts.

4. A self-cooled, vertically wound passive filter according to claim 1, characterized in that: The inner wall of the contactor (4) is fixedly connected with a connecting cable (41), a capacitor cable (42), and a shorting cable (43).

5. A self-cooled, vertically wound passive filter according to claim 4, characterized in that: The outer wall of the connecting cable (41) and the shorting cable (43) on the side away from the contactor (4) is fixedly connected to the outer wall of the insulated wire (25), and the outer wall of the capacitor cable (42) on the side away from the contactor (4) is fixedly connected to the outer wall of the capacitor (5).

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