CN204792343U - Three -dimensional triangle -shaped reactor - Google Patents

Abstract

The utility model relates to the technical field of reactors, in particular to a three-dimensional triangular reactor, which is used in a converter or an inverter cabinet of a power system, and has the characteristics of good symmetry, high efficiency and small impedance deviation; it includes Three iron core columns, an upper iron yoke and a lower iron yoke, wherein the three iron core columns are arranged in a triangle, and also includes a fixed and insulating integrated structure. The number of fixed slots is 3, and they are arranged in a triangle; by adopting a fixed and insulating integrated structure, the three iron core columns can be made into a triangle, and during the manufacturing, transportation, storage and use of the reactor, the three iron cores The position of the column is not easy to move, so that the reactor can maintain the form of triangular symmetrical arrangement of the iron core column, so that it has the characteristics of magnetic circuit symmetry, small impedance deviation, small loss, and high working efficiency.

Description

Three-dimensional triangle reactor

technical field

The utility model relates to the technical field of reactors, in particular to a three-dimensional triangular reactor, which is used in a converter or an inverter cabinet of a power system, and has the characteristics of good symmetry, high efficiency and small impedance deviation.

Background technique

In the converter or inverter cabinet of the power system, when the current signal is converted from DC to AC, a large number of harmonics will be generated, which cannot be directly connected to the grid or connected to electrical equipment. Reactors and capacitors must be added for filtering. Now the industry mostly adopts the LC filter method, that is, the filter method of inductance L + capacitor C, to reduce the harmonic content and meet the requirements of grid connection or the use of electrical equipment.

The traditional inductance design scheme uses silicon steel as the magnetic material, the reactor structure is planar, the three-phase magnetic circuit is not completely symmetrical, the three-phase inductance cannot be completely balanced, and the eddy current loss of the silicon steel magnetic material is large at high frequencies. The loss of the reactor is too large, which affects the efficiency of the entire system.

Chinese utility model patent CN203706810U provides a three-dimensional triangular dry-type reactor, which includes an iron core, an insulating layer is provided on the outer wall of the iron core, a coil is wound on the outer wall of the insulating layer, and two ends of the iron core are provided. There are an upper block and a lower block, an upper iron yoke is arranged on the upper block, an upper clamp is set on the upper iron yoke, a lower iron yoke is arranged on the lower block, and the The lower iron yoke is covered with a lower clamp, and a foot is provided on the lower clamp, and the lower clamp and the foot are fastened by bolts; the iron core is composed of three iron core columns, and each iron core column A plurality of core cakes are stacked to form a cylindrical structure, and an air gap plate is sandwiched between adjacent core cakes; further, the core cakes are made of amorphous alloy soft magnetic material. This patented technology has the advantages of relatively small hysteresis loss and eddy current loss by setting the reactor in the form of a three-dimensional triangle and using amorphous alloy soft magnetic materials.

However, in the above-mentioned patented technology, the upper and lower pads are arranged between the upper and lower iron yokes and the upper and lower surfaces of the iron core column, and the upper and lower clamps are arranged outside the upper and lower iron yokes, and the upper clamp and the lower clamp are fastened by screws to fix the iron core column. Between the upper and lower iron yokes, so this patented technology has the following defects: 1. The upper and lower iron yokes, the upper and lower pads, and the upper and lower surfaces of the three iron core columns are all planar, and are only fastened by the screws between the upper and lower clamps. Pressure is used to maintain the triangular shape of the three iron core columns. During the manufacturing, transportation, storage and use of the reactor, the positions of the three iron core columns are prone to slight or even large movements, so that the reactor cannot maintain the triangular shape. , so that the loss increases and the work efficiency is seriously reduced; 2. The upper block and the lower block are arranged between the iron yoke and the iron core column, which play an insulating role. This separate insulating structure increases the reactor's Volume; 3. Similarly, an air gap plate for adjusting inductance parameters is set between adjacent core cakes, which also increases the volume of the reactor.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide a three-dimensional triangular reactor, which can make the three core columns form a triangle by adopting a fixed and insulating integrated structure, and can be used in the manufacturing, transportation, storage and use of the reactor. Among them, the position of the three iron core columns is not easy to move, so that the reactor can maintain the form of triangular symmetrical arrangement of the iron core columns, so that it has the characteristics of magnetic circuit symmetry, small impedance deviation, small loss, and high working efficiency.

The technical scheme of the utility model is: a three-dimensional triangular reactor, including three iron core columns, an upper iron yoke and a lower iron yoke, wherein the three iron core columns are arranged in a triangle, and also includes a fixed insulation integrated structure, the fixed insulation The integrated structure includes iron yoke fixing slots and center column fixing slots, and the number of center column fixing slots is three and arranged in a triangle.

Optimally, the fixed and insulating integrated structure is made of insulating materials.

Optimally, the number of iron yoke fixing slots is two, which are respectively located at the upper and lower parts of the fixed-insulation integrated structure; the central column fixing slots are located at the middle of the fixed-insulated integrated structure.

Optimally, the interior of the upper iron yoke and the lower iron yoke is arranged as a triangular hollow structure, and the main bodies of the upper iron yoke and the lower iron yoke are formed by one-time continuous winding of silicon steel strips.

Optimized, the core column is made of pressed metal magnetic powder core.

Optimally, the metal magnetic powder core adopts iron-silicon magnetic powder core.

Optimally, it also includes a coil wound outside the iron core column, an upper clip set on the upper iron yoke, and a lower clamp set on the lower iron yoke.

In the present utility model, the triangular arrangement of the three iron core columns means that the connecting lines of the three centers of the three cylindrical iron core columns form a triangle; The lines connecting the centers of the fixed grooves form a triangle. Specifically, as shown in accompanying drawings 1-4, the triangle formed above is an equilateral triangle, and in the present utility model, this arrangement is made into a symmetrical arrangement of triangles.

The shape and specification of the three iron yoke fixing grooves are adapted to the shape of the upper iron yoke and the lower iron yoke, and are used to fix the upper iron yoke and the lower iron yoke; the shape and specification of the center column fixing groove are adapted to the shape of the iron core column, It is used to fix the core column; since the three center column fixing grooves are arranged in a triangle, when the iron core column is fixedly placed in the center column fixing groove, the three iron core columns are also arranged in a triangle, and through the fixing effect of the center column fixing groove, the The position of the three iron core columns is not easy to move during the preparation, storage and transportation of the reactor; each reactor can be connected to the upper iron yoke, three iron core columns, and the lower iron yoke of the reactor through two fixed and insulating integrated structures. At the same time, they are fixed together to make the overall structure of the reactor more stable and firm, and the positioning of each part is accurate, so that the upper and lower iron yokes and iron core columns are closely matched to form an integrated structure, which can effectively reduce noise and ensure the symmetry of the magnetic circuit.

The beneficial effects of the utility model are:

1. By adopting the fixed and insulating integrated structure, the iron yoke fixing groove and the center column fixing groove can make the three iron core columns symmetrically arranged in a triangle, and during the manufacturing, transportation, storage and use of the reactor, the three iron core columns The position of the reactor is not easy to move, and it can maintain the triangular symmetrical arrangement of the iron core columns, so that the reactor has the characteristics of magnetic circuit symmetry, small impedance deviation, small loss, and high working efficiency.

2. The fixed and insulating integrated structure uses insulating materials to play an insulating role, so that the reactor does not need to be separately provided with upper and lower pads, which saves space and reduces the volume of the reactor, making the magnetic circuit utilization rate high and the structure Compact, takes up less space, effectively reduces windings and reduces costs.

3. The iron core column is made of pressed metal magnetic powder core, so that the iron core column itself has an evenly distributed air gap, and there is no need to add an air gap plate separately, which has achieved the effect of further reducing the volume of the reactor.

4. The iron core column of the reactor adopts metal magnetic powder core as the magnetic material, which reduces the eddy current loss under high-frequency harmonics; the upper iron yoke and the lower iron yoke adopt silicon steel strip, and the iron core column adopts metal magnetic powder core, which makes the reactor both The advantages of the two magnetic materials make the reactor itself not generate harmonics.

5. The reactor is in the form of a three-dimensional triangle. When the magnetic circuit passes through the upper and lower iron yokes, the magnetic flux interlinks with the magnetic circuit of the side column in two directions along the triangle to increase the effective utilization of the magnetic circuit and effectively reduce the upper and lower yokes. The cross-sectional area of the lower iron yoke reduces the loss of the iron yoke, reduces the cost of the iron core, and improves efficiency.

Description of drawings

Fig. 1 is the overall schematic diagram of the three-dimensional triangular reactor provided by the utility model;

Fig. 2 is the structural diagram of the upper and lower iron yokes and iron core columns of the three-dimensional triangular reactor provided by the utility model;

Fig. 3 is a schematic diagram of the magnetic circuit of the present invention (the direction of the arrow in the figure indicates the direction of the magnetic force line);

Fig. 4 is a schematic diagram of the fixed and insulating integrated structure provided by the utility model.

1. Upper iron yoke; 2. Coil; 3. Upper clamp; 4. Fixed and insulating integrated structure; 5. Lower clamp; 6. Iron core column; 7. Lower iron yoke; 8. Iron yoke fixing groove; 9. Center column fixing slot.

Detailed ways

Below in conjunction with accompanying drawing, the implementation of the present utility model is described in detail.

The technical solution of this embodiment is: a three-dimensional triangular reactor, including three iron core columns, an upper iron yoke and a lower iron yoke, wherein the three iron core columns are arranged in a triangle, and also includes a fixed insulation integrated structure, the fixed insulation The integrated structure includes iron yoke fixing slots and center column fixing slots, and the number of center column fixing slots is three and arranged in a triangle.

Wherein, the fixed and insulating integrated structure is made of insulating materials.

Among them, the number of iron yoke fixing grooves is 2, which are respectively located at the upper part and the lower part of the fixed-insulation integrated structure; the central column fixing groove is located at the middle of the fixed-insulated integrated structure.

Wherein, the interior of the upper iron yoke and the lower iron yoke is arranged as a triangular hollow structure, and the main bodies of the upper iron yoke and the lower iron yoke are formed by one-time continuous winding of a silicon steel strip.

Among them, the iron core column is made of pressed metal magnetic powder core.

Wherein, the metal magnetic powder core adopts iron-silicon magnetic powder core.

Among them, it also includes a coil wound outside the iron core column, an upper clip set on the upper iron yoke, and a lower clamp set on the lower iron yoke.

Attached Figure 3 illustrates the principle of the reactor, setting conditions: the three-phase reactor flows through the alternating current with superimposed harmonics, taking the static state of the A phase as an example, the fundamental current is I, after the excitation, the direction of the magnetic force line is upward , as shown in the schematic diagram of attached drawing 3, when passing through the triangular iron yoke, a part of the magnetic force lines interlinks with the side columns along the shortest path, and another part of the magnetic force lines interlinks with the side columns along the opposite path.

Claims (7)

1. a 3-D triangle reactor, comprise three core limbs, upper yoke and lower yokes, wherein three core limb triangularities are arranged, it is characterized in that: also comprise fixed insulation integral structure, described fixed insulation integral structure comprises iron yoke holddown groove and center pillar holddown groove, the quantity of center pillar holddown groove is 3, and triangularity is arranged.

2. 3-D triangle reactor according to claim 1, is characterized in that: described fixed insulation integral structure adopts insulating material to make.

3. 3-D triangle reactor according to claim 2, is characterized in that: the quantity of iron yoke holddown groove is 2, lays respectively at the upper and lower of fixed insulation integral structure; Center pillar holddown groove is positioned at the middle part of fixed insulation integral structure.

4. 3-D triangle reactor according to claim 3, is characterized in that: the inside of upper yoke and lower yoke is set to leg-of-mutton hollow-core construction, and the main body of upper yoke and lower yoke adopts silicon steel band one-time continuous winding to form.

5. 3-D triangle reactor according to claim 4, is characterized in that: core limb adopts metal magnetic powder core compacting to form.

6. 3-D triangle reactor according to claim 5, is characterized in that: described metal magnetic powder core adopts iron silica magnetic particle core.

7. 3-D triangle reactor according to claim 6, is characterized in that: also comprise the coil be wrapped in outside core limb, the upper clamping piece be enclosed within upper yoke, the lower clamping piece be enclosed within lower yoke.