CN214380836U

CN214380836U - Conjugate assembled passive harmonic filter

Info

Publication number: CN214380836U
Application number: CN202120654358.1U
Authority: CN
Inventors: 华新荣; 陶旭峰
Original assignee: Shanghai Wenda Telecommunication Equipment Factory
Current assignee: Shanghai Wenda Telecommunication Equipment Factory
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-10-08
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to a conjugate assembly type passive harmonic filter, which comprises three reactors, wherein the three reactors share one iron core; the iron core is formed by assembling four iron yokes and nine iron core columns; four indisputable yokes are transversely arranged, every three iron core post is a set of, vertically arrange between two adjacent indisputable yokes, the iron core post both ends support respectively with two adjacent indisputable yokes on, constitute a closed magnetic path jointly, and form multistage magnetic gap between indisputable yoke and iron core post, on same three coil one-by-one of winding the chunk overlaps respectively the three iron core post of same group one-by-one, three iron core post one-to-one of group, link line between the corresponding iron core post, the upper and lower both sides of every line are all equallyd divide and are do not pasted with the arm-tie, the arm-tie passes the skeleton hole of coil together with the three iron core post on a line respectively to attached respectively on all iron yokes, both sides are equallyd divide and do not are provided with the clamp plate about every iron yoke, through all iron yokes, iron core posts of all clamp plate, arm-tie fixed connection.

Description

Conjugate assembled passive harmonic filter

Technical Field

The utility model relates to an electric power harmonic filter field, concretely relates to passive harmonic filter of conjugate assembled.

Background

With the wide application of nonlinear power loads, the harmonic current pollution of the power grid is increasingly serious. The presence of harmonics has serious hazards, such as increased power consumption of systems, lines and equipment; the power factor of the power supply and the utilization rate of the system capacity are reduced; the safety of the operation of the power system is reduced, and the like. Therefore, the harmonic waves and the treatment thereof have attracted high attention from governments, research and research circles and industrial circles.

Traditional passive harmonic filter, its built-in a plurality of reactors to be connected through reactor and other electric elements and constitute filter circuit, like patent number: CN02260219.4 passive three-phase filter circuit. The reactors are all independent core columns, so that the reactors are relatively large in overall size and limited by the size of the inner space of the case of the filter, and spatial layout is not facilitated.

Disclosure of Invention

In order to solve the above problem, the utility model provides a passive harmonic filter of conjugate assembled.

The technical scheme of the utility model:

a conjugate assembly type passive harmonic filter comprises three reactors, two RC loops and a plurality of wiring terminals, wherein the three reactors, the two RC loops and the wiring terminals are connected in series/parallel to form a filter circuit, each reactor comprises an iron core and winding blocks arranged on the iron core, and each winding block is provided with three coils; three reactors share one iron core.

The iron core is formed by assembling four iron yokes and nine iron core columns; the iron yokes and the iron core columns are square, four iron yokes are transversely arranged, every three iron core columns are in a group and longitudinally arranged between every two adjacent iron yokes, two ends of each iron core column are respectively abutted against the two adjacent iron yokes to jointly form a closed magnetic flux path, multiple sections of magnetic gaps are formed between the iron yokes and the iron core columns, three coils of the same winding block are respectively sleeved on the three iron core columns of the same group one by one, the three iron core columns of the same winding block are in one-to-one correspondence and are connected into lines between the corresponding iron core columns, pull plates are respectively attached to the upper side and the lower side of each line, the pull plates respectively penetrate through framework holes of the coils together with the three iron core columns on the line and are respectively attached to all the iron yokes, pressing plates are respectively arranged on the upper side and the lower side of each iron yoke, pressing plates on the upper side and the lower side of all the pull plates on the lower side of the same iron yoke are pressed through all the pressing plates, The pulling plate is fixedly connected with all the iron yokes and the iron core columns.

Two ends of any number of pressing plates extend and bend, and fixing holes are formed in the pressing plates, so that the mounting support of the three reactors is formed. Thus, the iron core of the installed reactor is clamped tightly, so that the noise of the iron core is reduced, and the vibration of the reactor is reduced.

For satisfying reactor inductance demand, the coil specification and size of installing on the iron leg between third and fourth two yokes is great, further design all yokes, the iron leg is arranged in on the coplanar, the highly unanimous of all iron legs between three preceding yokes and the three preceding yokes, the fourth yoke be higher than three preceding yokes, the parallels chip on the third yoke, the height unanimous of third yoke and fourth yoke behind the parallels chip, all iron legs between two yokes of third and fourth are highly unanimous with the fourth yoke.

The upper side pulling plate is divided into two sections by taking the front end of the sizing block chip as a boundary and staggered up and down.

The RC loop is formed by connecting three capacitors in a triangular mode and connecting two resistors in parallel on the capacitors.

The filter further comprises a chassis; the reactor and the RC loop are arranged in the case, and the wiring terminal is embedded on the case.

Three discharging resistors are also connected in series between the connected reactor and the RC loop.

One side of the box body is provided with an opening, and a fan is arranged in the box body.

The utility model has the advantages of reasonable design, simple structure, three reactors sharing one iron core, conjugate type assembly, greatly reduced overall volume, space installation, improved production efficiency, and formation of multi-section magnetic gap, full utilization of electromagnetic superposition principle, and no increase of reactor volume and iron core, and basically elimination of magnetic saturation when the reactor works in a larger current and better filtering state; the iron core structure is further optimized, so that the three reactors are reasonable in layout and stable in connection.

Drawings

Fig. 1 is a schematic diagram of a conjugate assembly type passive harmonic filter structure.

Fig. 2 is a schematic diagram of an internal structure of a conjugate assembly type passive harmonic filter.

Fig. 3 is a schematic diagram of a three-reactor structure.

Fig. 4 is a circuit diagram of a conjugate assembly type passive harmonic filter.

In the figure, a filter 1 is a reactor 1-1, a reactor 1-2, a reactor 1-3 iron core 2 iron yoke 2-1 iron core column 2-2 pulling plate 2-3 pressing plate 2-4 iron core piece 2-5 coil 3-1.

Detailed Description

As shown in fig. 1-4, a conjugate assembly type passive harmonic filter, wherein the filter 1 comprises a reactor 1-1, a reactor 1-2, a reactor 1-3, two RC loops and a plurality of terminals, and the three reactors, the two RC loops and the terminals are connected in series/parallel to form a filter circuit, wherein the reactor 1-1, the reactor 1-2 and the reactor 1-3 each comprise an iron core 2 and winding blocks mounted on the iron core 2, and each winding block has three coils 3-1; the three reactors share one iron core 2; the iron core 2 is formed by assembling four iron yokes 2-1 and nine iron core columns 2-2; the iron yokes 2-1 and the iron core columns 2-2 are square, four iron yokes 2-1 are transversely arranged, every three iron core columns 2-2 are in a group and longitudinally arranged between two adjacent iron yokes 2-1, two ends of each iron core column 2-2 are respectively abutted against two adjacent iron yokes 2-1 to jointly form a closed magnetic circuit, a plurality of sections of magnetic gaps are formed between the iron yokes and the iron core columns, three coils of the same winding block are respectively sleeved on the three iron core columns 2-2 of the same group one by one, the three groups of iron core columns 2-2 correspond one by one, lines are connected between the corresponding iron core columns 2-2, pull plates 2-3 are respectively attached to the upper side and the lower side of each line, the pull plates 2-3 respectively penetrate through framework holes of the coils 3-1 together with the three iron core columns 2-2 on the line and are respectively attached to all the iron yokes 2-1, the upper side and the lower side of each iron yoke 2-1 are respectively provided with a pressing plate 2-4, the upper pressing plate 2-4 is pressed on all pulling plates 2-3 on the upper side of the same iron yoke 2-1, the lower pressing plate 2-4 is pressed on all pulling plates 2-3 on the lower side of the same iron yoke 2-1, and all iron yokes 2-1 and iron core columns 2-2 are fixedly connected through all pressing plates 2-4 and pulling plates 2-3; two ends of any number of pressing plates 2-4 extend and bend, and are provided with fixing holes to form an installation support of the reactor 1-1, the reactor 1-2 and the reactor 1-3; all the iron yokes 2-1 and the iron core columns 2-2 are arranged on the same plane, the heights of the first three iron yokes and all the iron core columns among the first three iron yokes are consistent, the height of the fourth iron yoke is higher than that of the first three iron yokes, a sizing block chip 2-5 is arranged on the third iron yoke, the heights of the third iron yoke and the fourth iron yoke behind the sizing block chip are consistent, and the heights of all the iron core columns among the third iron yoke and the fourth iron yoke are consistent; the upper side pulling plate is divided into two sections by taking the front end of the sizing block chip 2-5 as a boundary, and the two sections are staggered up and down; the RC loop is formed by connecting three capacitors in a triangular mode and connecting two resistors in parallel on the capacitors; the filter further comprises a chassis; the reactor and the RC loop are arranged in the case, and the wiring terminal is embedded on the case; three discharging resistors are also connected in series between the connected reactor and the RC loop; one side of the box body is provided with an opening, and a fan is arranged in the box body.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A conjugate assembly type passive harmonic filter comprises three reactors, two RC loops and a plurality of wiring terminals, wherein the three reactors, the two RC loops and the wiring terminals are connected in series/parallel to form a filtering loop, each reactor comprises an iron core and winding blocks arranged on the iron core, and each winding block is provided with three coils; the three reactors share one iron core;

the iron core is formed by assembling four iron yokes and nine iron core columns; the iron yokes and the iron core columns are square, the four iron yokes are transversely arranged, every three iron core columns are in a group and longitudinally arranged between every two adjacent iron yokes, two ends of each iron core column are respectively abutted against the two adjacent iron yokes to jointly form a closed magnetic flux path, multiple sections of magnetic gaps are formed between the iron yokes and the iron core columns, three coils of the same winding block are respectively sleeved on the three iron core columns of the same group one by one, the three iron core columns of the same winding block are in one-to-one correspondence and are connected with lines between the corresponding iron core columns, pull plates are respectively attached to the upper side and the lower side of each line, the pull plates respectively penetrate through framework holes of the coils together with the three iron core columns on the line and are respectively attached to all the iron yokes, pressing plates are respectively arranged on the upper side and the lower side of each iron yoke, pressing plates on the upper side and the lower side of all the pull plates on the lower side of the same iron yoke are pressed through all the pressing plates, The pulling plate is fixedly connected with all the iron yokes and the iron core columns.

2. The conjugate assembled passive harmonic filter according to claim 1, wherein any number of the press plates are extended and bent at both ends and provided with fixing holes thereon to constitute mounting brackets for three reactors.

3. The conjugate assembled passive harmonic filter of claim 1, wherein all the yokes and the core legs are disposed on the same plane, the first three yokes and all the core legs between the first three yokes have the same height, the fourth yoke is higher than the first three yokes, the third yoke is provided with a spacer chip, the third yoke behind the spacer chip has the same height as the fourth yoke, and all the core legs between the third and fourth yokes have the same height as the fourth yoke;

4. The conjugate assembled passive harmonic filter of claim 1, wherein the RC loop is formed by three capacitors connected in a delta form and two resistors connected in parallel to the capacitors.

5. The conjugate assembled passive harmonic filter of claim 1, further comprising a chassis; the reactor and the RC loop are arranged in the case, and the wiring terminal is embedded on the case.

6. The conjugate assembled passive harmonic filter of claim 1, wherein three discharge resistors are connected in series between the connected reactor and the RC loop.

7. The conjugate assembled passive harmonic filter according to claim 5, wherein the case is open at one side and has a fan mounted therein.