A winding connection structure of an auto-coupling step-down phase-shifting transformer

Abstract

The present invention discloses a winding connection structure of an auto-coupling step-down phase-shifting transformer, comprising an iron core body and a separator block; 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 a coil is wound on the vertical column; a plurality of the separator blocks are fixedly arranged on the vertical column in a linear array, and a coil winding cavity of the auto-coupling step-down phase-shifting transformer is formed between two adjacent separator blocks; the structure also comprises a wedge-shaped groove; two of the wedge-shaped grooves are arranged on the separator block; the wedge-shaped groove is an arc structure; the two wedge-shaped grooves on a plurality of the separator blocks constitute two symmetrically arranged spiral structures. The winding connection structure of the auto-coupling step-down phase-shifting transformer has a simple and reasonable structure and an ingenious design, and can fix the position of the coil winding to avoid the position of the coil from being offset, thereby improving the use effect of the auto-coupling step-down phase-shifting transformer.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, in particular to a winding connection structure of an auto-coupling step-down phase-shifting transformer. Background Art

[0002] The autotransformer is a special type of transformer. Its core feature is that it uses the principle of autotransformer to achieve voltage up and down conversion, and has a phase shifting function. An autotransformer is a transformer whose primary and secondary windings are on the same winding, and the primary and secondary windings are directly connected in series. The primary and secondary sides of the autotransformer share a part of the winding, and the voltage up and down conversion is achieved through this part of the winding.

[0003] For example, the Chinese invention patent with publication number CN205230789U provides a winding connection structure of an autotransformer with phase shifting, and the technical solution is: the phase-adjusting winding, the voltage-adjusting winding, the common winding, and the series winding are arranged in sequence from the inside to the outside starting from the core column, the series winding and the common winding are connected in series with each other, the voltage-adjusting winding is connected in series with the head end of the common winding through the voltage-adjusting on-load switch, and the phase-adjusting winding is cross-connected in series with the end of the common winding through the phase-adjusting on-load switch. The beneficial effect of the present invention is: by adopting the winding connection structure of the autotransformer with low voltage as on-load voltage regulation and the phase angle between high and low voltage being continuously adjustable, the functions of phase shifting and voltage regulation of the autotransformer are realized, and the voltage and current of each parallel branch of the parallel power system are controlled, thereby solving the overvoltage and overcurrent problems caused by the parallel transmission circuit.

[0004] At present, the auto-coupling step-down phase-shifting transformer on the market needs to be wound and connected on the iron core during use. The long-term use of the auto-coupling step-down phase-shifting transformer will cause the vibration of the iron core due to electromagnetic vibration and mechanical stress, which can easily cause the coil position to shift. In addition, since the texture of the iron core is relatively hard, the friction between the iron core and the coil will cause damage or even breakage to the coil, thus affecting the use effect of the auto-coupling step-down phase-shifting transformer. Summary of the invention

[0005] The object of the present invention is to provide a winding connection structure of an auto-coupling step-down phase-shifting transformer to solve the problem of damage or even breakage of the coils mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a winding connection structure of an auto-coupling step-down phase-shifting transformer, comprising an iron core body and a separator block; the iron core body comprises a horizontal column and a vertical column; a plurality of the separator blocks are fixed on the vertical column in a linear array, and an auto-coupling step-down phase-shifting transformer coil winding cavity is formed between two adjacent separator blocks.

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

[0008] Preferably, the number of the vertical columns is three, and coils are wound around the vertical columns.

[0009] Preferably, it also includes a wedge-shaped groove; two of the wedge-shaped grooves are opened on the dividing block.

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

[0011] Preferably, the two wedge-shaped grooves on a plurality of the separation 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 regulating winding, a compensation winding and a low-voltage winding.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention fixes one end of the coil on the vertical column by setting a partition block and a wedge-shaped groove, and places the coil between the two partition blocks. Then, the coil is wound in the coil winding cavity of the autocoupler step-down phase-shifting transformer. After winding one circle, the coil is passed through the wedge-shaped groove, so that the coil is placed in the next coil winding cavity of the autocoupler step-down phase-shifting transformer and is wound repeatedly. Since the two wedge-shaped grooves on several partition blocks constitute two symmetrically arranged spiral structures, the wound coil can be turned until the winding connection of the core body is completed. Compared with the prior art, the present invention has a simple and reasonable structure and a clever design. The coil winding position can be fixed to avoid the position of the coil from being offset, thereby improving the use effect of the autocoupler step-down phase-shifting transformer.

[0015] 2. To achieve the step-down function, the transformer has a total of 8 windings on each core column, including low-voltage winding, voltage-regulating winding, common winding, high-voltage winding, phase-regulating winding, and compensation winding. One end of the high-voltage winding is three-phase led out, and the other end is connected to the voltage-regulating winding and then connected in series with the common winding. The first end of the common winding is three-phase led out as a group of medium-voltage side, and the end of the common winding is connected to the neutral point and the high voltage to form an autocoupler star connection.

[0016] In order to realize the phase shifting function, the connection point between the common winding and the voltage regulating winding of each phase of the transformer (i.e., the first end of the medium voltage after being led out) is led out and connected to the phase-adjusting winding of the opposite phase. The phase-adjusting winding is connected in series to the phase-adjusting switch step by step, and then connected to the compensation winding after being led out from the switch, and finally the three phases are led out to another set of medium voltage side. In addition, the low-voltage winding of the three phases is connected in a conventional triangle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2This 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 structure of the separator block in Example 2.

[0021] In the figure:

[0022] 1. High voltage winding; 2. Voltage regulating winding; 3. Common winding; 4. Phase regulating winding; 5. Compensation winding; 6. Low voltage winding; 7. Core body; 8. Separator block; 9. Wedge-shaped slot; 701. Horizontal column; 702. Vertical column. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] See also Figure 1 The present invention provides a technical solution: a winding connection structure of an autocoupled step-down phase-shifting transformer, including a high-voltage winding 1, a voltage-regulating winding 2, a common winding 3, a phase-adjusting winding 4, a compensating winding 5 and a low-voltage winding 6. The transformer of the present invention is a three-phase structure, and each phase has a total of six windings, namely, a high-voltage winding 1, a voltage-regulating winding 2, a common winding 3, a phase-adjusting winding 4, a compensating winding 5, and a low-voltage winding 6. There are a total of 18 windings in the three phases.

[0026] Figure 1 The winding connection structure diagram of the present invention is shown in the figure. The high-voltage winding 1 of each phase is connected in series with the voltage regulating winding 2 and the common winding 3 of the phase in sequence. Then the tail ends of the three-phase series windings are connected together, and a neutral point is led out to terminate the 0 phase. In this way, a structure with high and medium voltage as auto-coupling connection and high voltage voltage regulation is formed. 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 end (LA1, LB1, LC1), and at the same time, the connection point is respectively connected to the phase-adjusting winding 4 of different phases. The phase-adjusting winding 4 is connected in series step by step to the phase-adjusting switch, and then connected to the compensation winding 5 after being led out from the switch. Finally, the three phases are led out as another set of medium voltage side line ends (LA2, LB2, LB3). In addition, the low-voltage winding 6 of the three phases is connected in a conventional triangle, and the three line ends a, b, and c are led out as the low-voltage side.

[0027] Embodiment 2:

[0028] See also Figures 2 to 4 The present invention provides a technical solution: a winding connection structure of an auto-coupling step-down phase-shifting transformer, comprising an iron core body 7 and a partition block 8; the iron core body 7 comprises a horizontal column 701 and a vertical column 702; the number of the horizontal columns 701 is two; the number of the vertical columns 702 is three, and a coil is wound on the vertical column 702; a plurality of partition blocks 8 are fixedly arranged on the vertical column 702 in a linear array, and a coil winding cavity of the auto-coupling step-down phase-shifting transformer is formed between two adjacent partition blocks 8;

[0029] It also includes a wedge-shaped groove 9; two wedge-shaped grooves 9 are opened on the dividing block 8; the wedge-shaped groove 9 is an arc-shaped structure; the two wedge-shaped grooves 9 on a plurality of dividing blocks 8 form two symmetrically arranged spiral structures.

[0030] The present invention sets a partition block 8 and a wedge-shaped groove 9 to fix one end of the coil on the vertical column 702, and places the coil between the two partition blocks 8. Then, the coil is wound in the coil winding cavity of the autocoupler step-down phase-shifting transformer. After winding one circle, the coil is passed through the wedge-shaped groove 9, so that the coil is placed in the next coil winding cavity of the autocoupler step-down phase-shifting transformer and is wound repeatedly. Since the two wedge-shaped grooves 9 on several partition blocks 8 constitute two symmetrically arranged spiral structures, the wound coil can be turned until the winding connection of the core body 7 is completed. Compared with the prior art, the present invention has a simple and reasonable structure and a clever design. The coil winding position can be fixed to avoid the coil position from being offset, thereby improving the use effect of the autocoupler step-down phase-shifting transformer.

[0031] Working principle: When in use, fix one end of the coil on the vertical column 702, and place the coil between two partition blocks 8, then wind the coil in the coil winding cavity of the autocoupler step-down phase-shifting transformer, after winding one circle, pass the coil through the wedge-shaped slot 9, place the coil in the next autocoupler step-down phase-shifting transformer coil winding cavity, and continue winding, and repeat this process. Since the two wedge-shaped slots 9 on several partition blocks 8 constitute two symmetrically arranged spiral structures, the wound coil can be turned until the winding connection of the core body 7 is completed.

[0032] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A winding connection structure of an auto-coupling step-down phase-shifting transformer, characterized in that: The invention comprises an iron core body (7) and a partition block (8); the iron core body (7) comprises a horizontal column (701) and a vertical column (702); a plurality of the partition blocks (8) are fixedly arranged on the vertical column (702) in a linear array, and a coil winding cavity of an auto-coupling step-down phase-shifting transformer is formed between two adjacent partition blocks (8).

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

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

4. The winding connection structure of the auto-step-down phase-shifting transformer according to claim 1 is characterized in that: It also comprises a wedge-shaped groove (9); two wedge-shaped grooves (9) are opened on the dividing block (8).

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

6. The winding connection structure of the auto-step-down phase-shifting transformer according to claim 5, characterized in that: The two wedge-shaped grooves (9) on a plurality of the separation blocks (8) form two symmetrically arranged spiral structures.

7. The winding connection structure of the auto-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-regulating winding (4), a compensating winding (5) and a low-voltage winding (6).

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