TWI391965B - Transformer structure - Google Patents

Description

Transformer structure

The invention relates to a transformer structure, in particular to an improved structure of an oil immersed transformer suitable for a corner coil.

Since the use of electric power has become the most important energy facility today, the operation of household appliances or the use of machinery must use electricity to convert electric energy into kinetic energy through electrical appliances. The rate is closely related to the people's livelihood issue. Generally, electricity is generated from atomic energy, water power, coal burning, etc., and the process of transmitting electricity from the location of the power plant must be processed by the substation and the transformer, and then the voltage can be supplied to the general voltage. Used by users.

Referring to Figures 1 and 2, there are top and side views of a conventional oil immersed transformer. The figure shows a conventional oil immersed transformer comprising a triangular coil 91, a pair of axial clamps, and a pair of long side clamps 93. The corner coil 91 has a pair of long sides 94 and a pair of short sides 95, and each of the corner coils 91 also extends from the low pressure lead-out copper plates 96a, 96b in the longitudinal direction (ie, the direction Y in the figure). Distribution, one far and near.

The pair of axial clamping members are composed of an upper clamping member 92a and a lower clamping member 92b. The upper clamping member 92a is located at the top end of the corner cylinder coil 91, and the lower clamping member 92b is located at the bottom end of the corner cylinder coil 91. The two clamping members 92a 92b is sandwiched by all the corner coils 91 and fixed tightly by the screw pile nut group, thereby axially positioning the corner coil 91, that is, the direction Z in the figure.

The two long side clips 93 are respectively clamped on the long side 94 of the outermost two corner coils 91 to sandwich all the corner coils 91, and pass through the screw pile nut group and the upper clamp member 92a and the lower clamp member. The 92b is fixed to each other such that the corner coil 91 is positioned in the direction X in the drawing.

However, since the conventional transformer structure does not have any tightening means on the short side 95, it does not have a positioning function in the direction Y, and the coil is liable to be deformed and displaced when an external short circuit is encountered. Therefore, there is a need for an improved structure to solve the above problems.

The transformer structure of the present invention comprises a plurality of corner coils, a plurality of arrays of low pressure copper strips, a pair of axial clips, a pair of long side clamps, and a plurality of copper side reinforcements. Each of the corner coils includes a pair of long sides and a pair of short sides, and each set of low pressure lead copper plates extends from the corresponding corner coils in different directions along the long sides to different positions.

The axial clamp member axially clamps the plurality of corner coils, and the long side clamps clamp the plurality of corner coils on the long sides of the outermost two corner coils.

The copper plate side reinforcing wood is adjacent to each pair of low pressure lead-out copper plates, and is integrally coupled by a screw lock member such as a screw pile nut group.

With the above structural design, all the corner coils are pressed by the clamping members and the reinforcing wood together, thereby achieving the purpose of three-dimensional simultaneous positioning. Therefore, it is ensured that it does not undergo a deformation displacement even when an external short circuit is encountered.

The transformer structure may further comprise a pair of coil side reinforcing woods, respectively clamping the corner coils on the two short sides of the corner coil to further strengthen the positioning effect of the coil Y direction. Moreover, the plurality of insulating tapes can be respectively passed through the coil side reinforcing wood to respectively tighten the corner cylinder coil.

The transformer structure may further include a plurality of connecting pieces respectively fixed to the axial clamping member and the coil side reinforcing wood. In a fixed manner, for example, a plurality of screw pile nut sets are used to pass through the coil side reinforcing wood and are respectively locked to the plurality of connecting pieces.

The copper plate side reinforcing wood is, for example, a three-copper side reinforcing wood.

Please refer to Figures 3~5. The figure shows an oil immersed transformer comprising triangular cylinder coils 11-13 as three-phase coils, a pair of axial clamps, a pair of long side clamps 15, and three copper side reinforcements 20-22. The triangular coils 11 to 13 are arranged in series, and the respective corner coils are spaced apart from each other, and are usually filled with an insulator in the gap. Each of the corner coils is identical in structure, and the corner tube coil 11 is taken as an example, and has a pair of long sides 111 and a pair of short sides 112, and two low pressure lead copper plates 16a extend from each corner coil. , 16b, distributed along the long side direction (ie, the direction Y in the figure), one far and near, arranged in two columns, the three low pressure lead copper plates 16a constitute an outer side of the column, and the three low pressure lead copper plates 16b constitute a column on the inner side.

The axial clamp member is composed of an upper clamp member 14a and a lower clamp member 14b. The upper clamp member 14a tightly clamps all the corner coils 11 to 13 from the top ends of the corner cylinder coils 11 to 13 and the lower clamp member 14b from the bottom ends of the corner cylinder coils 11 to 13, and the two clamp members 14a, 14b are screw-locked. For example, a plurality of screw pile nut groups 30 are fixed, whereby the corner coils 11 to 13 are axially positioned, that is, the direction Z in the drawing.

The two long side clamp members 15 are respectively located on the long side 111 of the outermost two corner cylinder coils 11, 13 and are tightly clamped by all the corner cylinder coils 11-13. Similarly, the two long side clamp members 15 are also locked and fixed to the upper clamp member 14a and the lower clamp member 14b through the screw pile nut group 31, so that the corner cylinder coils 11 to 13 are positioned in the direction X in the drawing.

In addition, the three-copper side reinforcing wood 20~22 is adjacent to each set of low-voltage copper strips 16a, 16b, and even if each row of low-voltage copper strips is attached to the reinforcing wood on both sides. The three copper plate side reinforcing woods 20 to 22 are integrally fixed by a screw lock member, for example, a plurality of screw pile nut groups 32, and ensure that the lead copper plates 16a, 16b and the upper and lower clamp members 14a, 14b of all the coils 11 to 13 are integrally stabilized. It helps to locate the transformer core in the direction Y in the figure.

It can be seen from the above that the improved structure of the transformer of the present invention enables all the coils to be tightly clamped by the clamps and the reinforcing wood, thereby achieving the purpose of positioning, so that even if an external short circuit is encountered, it can ensure that it does not undergo deformation and displacement. .

Referring to Fig. 6 and Fig. 7, respectively, the top view and the side view of the oil immersed transformer of the second embodiment, wherein Fig. 6 is a clear view of the connecting piece, and the copper side reinforcing wood has been omitted. In this example, two pairs of coil side reinforcing woods 23, 24 are additionally added to the above embodiments. Each pair of coil side reinforcing woods 23 (24) of the present embodiment is disposed on two opposite short side sides 112 of the corner cylinder coils 11 to 13 to clamp all the corner cylinder coils 11 to 13. In the transformer, the connecting piece 25 is further used, and the screw pile nut group 33 is inserted through the coil side reinforcing wood 23, 24 to be locked to the upper and lower connecting pieces 25, so that the coil side reinforcing wood 23, 24 and the upper and lower clips are clamped. The pieces 14a, 14b are integrally and firmly connected, and the positioning of the transformer core body in the direction Y in the figure is further enhanced.

More preferably, the present embodiment also uses an insulating tape 26 such as a PG tape wound into a thin strip, through the coil side reinforcing wood 23, 24 and the inter-coil insulation to individually tighten the corner coils 11 to 13 This also helps to make all the coils firmly connected.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

91. . . Corner coil

92a. . . Upper clamp

92b. . . Lower clamp

93. . . Long side clamp

94. . . Long side

95. . . Short side

96a, 96b. . . Low pressure lead copper plate

11,12,13. . . Corner coil

111. . . Long side

112. . . Short side

14a. . . Upper clamp

14b. . . Lower clamp

15. . . Long side clamp

16a, 16b. . . Low pressure lead copper plate

20,21,22. . . Copper side reinforcement wood

23,24. . . Coil side reinforcement wood

25. . . Connecting piece

26. . . Insulating tape

30, 31, 32, 33. . . Screw pile nut group

Figure 1 is a top view of a conventional oil immersed transformer.

Figure 2 is a side view of a conventional oil immersed transformer.

Figure 3 is a top plan view of an oil immersed transformer of a first preferred embodiment of the present invention.

Figure 4 is a side elevational view of the oil immersed transformer of the first preferred embodiment of the present invention.

Figure 5 is a front elevational view of the oil immersed transformer of the first preferred embodiment of the present invention.

Figure 6 is a top plan view of an oil immersed transformer of a second preferred embodiment of the present invention.

Figure 7 is a side elevational view of an oil immersed transformer of a second preferred embodiment of the present invention.

11,12,13. . . Corner coil

112. . . Short side

14a. . . Upper clamp

15. . . Long side clamp

16a, 16b. . . Low pressure lead copper plate

20,21,22. . . Copper side reinforcement wood

32. . . Screw pile nut group

Claims (6)

A transformer structure comprising: a plurality of corner coils, each of the corner coils includes a pair of long sides and a pair of short sides; a plurality of low-voltage lead plates are drawn, and each set of low-voltage copper strips is corresponding to the plurality of corner coils The direction of the long side extends to different positions; a pair of axial clips axially clamp the plurality of corner coils; and a pair of long side clamps on the long sides of the outermost two corner coils The plurality of corner coils are clamped; and the plurality of copper side reinforcing woods are adjacent to each pair of low pressure copper strips and are integrally coupled by a screw lock. The transformer structure according to claim 1, further comprising a pair of coil side reinforcing woods for clamping the plurality of corner coils on the pair of short sides of the plurality of corner coils. The transformer structure of claim 2, further comprising a plurality of insulating tapes that are passed through the pair of coil side reinforcing woods to respectively tighten the plurality of corner coils. The transformer structure of claim 2, further comprising a plurality of connecting pieces respectively connected to the pair of axial clamping members and the pair of coil side reinforcing woods. The transformer structure of claim 4, further comprising a plurality of screw pile nut sets passing through the pair of coil side reinforcing wood and respectively locked to the plurality of connecting pieces. The transformer structure according to claim 1, wherein the plurality of copper side reinforcing wood means three copper side reinforcing wood.