Winding wiring structure of self-coupling step-down phase-shifting transformer

Abstract

The utility model discloses a winding wiring structure of a self-coupling step-down phase-shifting transformer. The winding wiring structure comprises an iron core body and separation blocks, the iron core body comprises a horizontal column and a vertical column; the number of the horizontal columns is two. The number of the vertical columns is three, and coils are wound on the vertical columns. The plurality of separation blocks are fixedly arranged on the vertical column in a linear array, and a coil winding cavity of the self-coupling step-down phase-shifting transformer is formed between every two adjacent separation blocks; a wedge-shaped groove is further included. The two wedge-shaped grooves are formed in the separation block; the wedge-shaped groove is of an arc-shaped structure; the winding wiring structure of the self-coupling step-down phase-shifting transformer is simple and reasonable in structure and ingenious in design, the winding position of a coil can be fixed, deviation of the position of the coil is avoided, and therefore the using effect of the self-coupling step-down phase-shifting transformer is improved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a winding connection structure for an autotransformer step-down phase-shifting transformer. Background Technology

[0002] An autotransformer is a special type of transformer. Its core feature is that it uses the principle of autotransformers to achieve voltage step-up and step-down transformation, and it also has a phase-shifting function. An autotransformer is a transformer in which the primary and secondary windings are on the same winding, and the primary and secondary windings are directly connected in series and self-coupled. The primary and secondary sides of an autotransformer share a portion of the winding, and the voltage step-up and step-down transformation is achieved through this portion of the winding.

[0003] For example, Chinese utility model patent CN205230789U provides a winding connection structure for an autotransformer. The technical solution is as follows: the phase-shifting winding, voltage-shifting winding, common winding, and series winding are arranged sequentially from the core column outwards. The series winding is connected in series with the common winding. The voltage-shifting winding is connected in series with the beginning of the common winding via a voltage-shifting on-load switch. The phase-shifting winding is connected in cross-series with the end of the common winding via a phase-shifting on-load switch. The beneficial effects of this utility model are: by adopting an autotransformer winding connection structure where the low voltage is adjusted under on-load conditions and the phase angle between the high and low voltages is continuously adjustable, the phase-shifting and voltage-shifting functions of the autotransformer are realized, controlling the voltage and current of each parallel branch in the parallel power system, thereby solving the overvoltage and overcurrent problems caused by parallel transmission circuits.

[0004] Currently, autotransformers on the market require coil winding and wiring on the iron core during use. However, with long-term use, the iron core of an autotransformer can vibrate due to electromagnetic vibration and mechanical stress, which can easily cause the coil position to shift. Furthermore, because the iron core is relatively hard, friction between the iron core and the coil can damage or even break the coil, thus affecting the performance of the autotransformer. Utility Model Content

[0005] The purpose of this invention is to provide a winding connection structure for an autotransformer step-down phase-shifting transformer to solve the problem mentioned in the background art that can cause damage or even breakage to the coil.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a winding connection structure for an autotransformer step-down phase-shifting transformer, comprising an iron core body and separator blocks; the iron core body comprises horizontal columns and vertical columns; a plurality of separator blocks are linearly arrayed and fixed on the vertical columns, and adjacent two separator blocks form an autotransformer coil winding cavity.

[0007] Preferably, the number of horizontal columns is two.

[0008] Preferably, there are three vertical columns, and coils are wound on the vertical columns.

[0009] Preferably, it also includes wedge-shaped grooves; two wedge-shaped grooves are formed on the partition block.

[0010] Preferably, the wedge-shaped groove has an arc-shaped structure.

[0011] Preferably, the two wedge-shaped grooves on the plurality of the partition blocks form two symmetrically arranged spiral structures.

[0012] Preferably, it also includes a high-voltage winding, a voltage-regulating winding, a common winding, a phase-adjusting winding, a compensation winding, and a low-voltage winding.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses partition blocks and wedge-shaped slots to fix one end of the coil on a vertical column, positioning the coil between two partition blocks. The coil is then wound into the winding cavity of an autotransformer. After one turn, the coil passes through the wedge-shaped slot, placing it in the next winding cavity, and this process is repeated. Because the two wedge-shaped slots on several partition blocks form two symmetrically arranged spiral structures, the wound coil can rotate until the winding connection of the core body is completed. Compared to existing technologies, this utility model has a simple and reasonable structure, and its design is ingenious. It can fix the position of the coil winding, preventing coil position deviation, thereby improving the performance of the autotransformer.

[0015] 2. To achieve the voltage reduction function, the transformer has eight windings on each core column: a low-voltage winding, a voltage regulating winding, a common winding, a high-voltage winding, a phase-adjusting winding, and a compensation winding. One end of the high-voltage winding has three phases led out, and the other end is connected to the voltage regulating winding and then in series with the common winding. The first three phases of the common winding are led out as a set of medium-voltage sides, and the ends of the common winding are connected to the neutral point to form an autotransformer star connection with the high-voltage side.

[0016] To achieve the phase-shifting function, the connection point of the common winding and voltage regulating winding of each phase of the transformer (i.e., the starting point of a medium-voltage circuit after being led out) is led out and connected to the phase-shifting winding of the opposite phase. The phase-shifting winding is connected in series step by step to the phase-shifting switch, and then led out from the switch and connected to the compensation winding. Finally, the three phases are led out separately as another set of medium-voltage sides. In addition, the low-voltage windings of the three phases are conventionally delta connected. Attached Figure Description

[0017] Figure 1 This is a diagram of the winding connection structure for Example 1;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 2;

[0019] Figure 3 This is a schematic diagram of the planar structure of Example 2;

[0020] Figure 4 This is a schematic diagram of the separator block structure in Example 2.

[0021] In the picture:

[0022] 1. High voltage winding; 2. Voltage regulating winding; 3. Common winding; 4. Phase adjusting winding; 5. Compensating winding; 6. Low voltage winding; 7. Core body; 8. Separator block; 9. Wedge slot; 701. Horizontal column; 702. Vertical column. Detailed Implementation

[0023] 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.

[0024] Example 1:

[0025] Please see Figure 1 This utility model provides a technical solution: a winding connection structure of an autotransformer step-down phase-shifting transformer, including a high-voltage winding 1, a voltage regulating winding 2, a common winding 3, a phase-shifting winding 4, a compensation winding 5, and a low-voltage winding 6. The transformer of this utility model has a three-phase structure, with a total of six windings per phase: one high-voltage winding 1, one voltage regulating winding 2, one common winding 3, one phase-shifting winding 4, one compensation winding 5, and one low-voltage winding 6. There are a total of 18 windings in the three phases.

[0026] Figure 1 The diagram shows the winding connection structure of this utility model. The high-voltage winding 1 of each phase is connected in series with the voltage regulating winding 2 and the common winding 3 of that phase. The ends of the three-phase series windings are then connected together, and a neutral point is led out to phase 0. This forms a structure with an autotransformer connection for both high and medium voltages and high-voltage regulation. The connection point between the common winding 3 and the voltage regulating winding 2 in each phase is led out to a medium-voltage line (LA1, LB1, LC1). Simultaneously, this connection point is connected to the phase-regulating winding 4 of the opposite phase. The phase-regulating winding 4 is connected in series to the phase-regulating switch, and from the switch, it is connected to the compensation winding 5. Finally, the three phases are led out as another set of medium-voltage side lines (LA2, LB2, LB3). Furthermore, the three-phase low-voltage winding 6 is a conventional delta connection, with three lines a, b, and c leading out to the low-voltage side.

[0027] Example 2:

[0028] Please see Figures 2 to 4 This utility model provides a technical solution: a winding connection structure for an autotransformer step-down phase-shifting transformer, including a core body 7 and separator blocks 8; the core body 7 includes horizontal columns 701 and vertical columns 702; there are two horizontal columns 701; there are three vertical columns 702, and coils are wound on the vertical columns 702; a plurality of separator blocks 8 are linearly arrayed and fixed on the vertical columns 702, and adjacent two separator blocks 8 form a winding cavity for the autotransformer coil;

[0029] It also includes wedge grooves 9; two wedge grooves 9 are formed on the partition block 8; the wedge grooves 9 are arc-shaped; the two wedge grooves 9 on several partition blocks 8 form two symmetrically arranged spiral structures.

[0030] This invention uses partition blocks 8 and wedge-shaped grooves 9 to fix one end of the coil to a vertical column 702, positioning the coil between two partition blocks 8. The coil is then wound into the winding cavity of the autotransformer. After one turn, the coil passes through the wedge-shaped groove 9, placing it in the next winding cavity and continuing this process. Because the two wedge-shaped grooves 9 on several partition blocks 8 form two symmetrically arranged spiral structures, the wound coil can be rotated until the winding connection of the core body 7 is completed. Compared to existing technologies, this invention has a simple and reasonable structure, ingenious design, and can fix the coil winding position, preventing coil position deviation and thus improving the performance of the autotransformer.

[0031] Working principle: In use, one end of the coil is fixed on the vertical column 702 and the coil is placed between two partition blocks 8. Then, the coil is wound in the winding cavity of the autotransformer. After winding one turn, the coil is passed through the wedge groove 9 so that the coil is placed in the next winding cavity of the autotransformer and wound. This process is repeated. Since the two wedge grooves 9 on several partition blocks 8 form two symmetrically arranged spiral structures, the wound coil can be rotated until the winding connection of the iron core body 7 is completed.

[0032] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] 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 winding connection structure for an autotransformer step-down phase-shifting transformer, characterized in that, It includes a core body (7) and partition blocks (8); the core body (7) includes a horizontal column (701) and a vertical column (702); a plurality of partition blocks (8) are linearly arrayed and fixed on the vertical column (702), and two adjacent partition blocks (8) form a winding cavity for an autotransformer coil.

2. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 1, characterized in that, The number of horizontal columns (701) is two.

3. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 1, characterized in that, There are three vertical columns (702), and coils are wound on the vertical columns (702).

4. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 1, characterized in that, It also includes wedge grooves (9); two wedge grooves (9) are formed on the partition block (8).

5. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 4, characterized in that, The wedge-shaped groove (9) has an arc-shaped structure.

6. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 5, characterized in that, Two wedge-shaped grooves (9) on several of the aforementioned partition blocks (8) constitute two symmetrically arranged spiral structures.

7. The winding connection structure of an autotransformer step-down phase-shifting transformer according to claim 1, characterized in that, It also includes a high-voltage winding (1), a voltage regulating winding (2), a common winding (3), a phase-adjusting winding (4), a compensation winding (5), and a low-voltage winding (6).

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