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Oil immersed transformer

An oil-immersed transformer, low-voltage winding technology, applied in the direction of transformers, fixed transformers, transformer/inductor coils/windings/connections, etc., can solve the problem of not being able to suppress the mechanical force of the coil, and improve no-load loss and work efficiency. , the effect of improving reliability

Inactive Publication Date: 2017-05-31
HITACHI IND EQUIP SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, on the upper fastener and the lower fastener, cutouts are provided in order to avoid the branch wires, and the mechanical force in the axial direction of the coil cannot be suppressed, so it is difficult to manufacture oil-immersed transformers without bonding the wires to the paint. with coil

Method used

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  • Oil immersed transformer
  • Oil immersed transformer
  • Oil immersed transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] For Example 1 of the present invention, use Figure 1A ~ Figure 1D illustrate. Figure 1A A perspective view showing an internal coil core assembly housed in an oil-immersed transformer, Figure 1B express will Figure 1A A perspective view of the cutout part of a part of the core, Figure 1C Indicates the upper fastener, Figure 1D Indicates the lower fastener.

[0037] In the figure, 101 is a coil, 102 is a branch wire lead-out part, 103 is an iron core, 104A is an upper fastener, 104B is a lower fastener, 105A and 105B are thermosetting resin-impregnated fibers.

[0038] also, Figure 1A It is a coil core assembly for a three-phase five-column wound core transformer. It shows that around the tap part 102 of the coil 101, a thermosetting resin-impregnated fiber 105A is wound in the coil axial direction, and the outermost circumference of the coil 101 is The coil core assembly in which the thermosetting resin-impregnated fiber 105B is wound horizontally serves as an...

Embodiment 2

[0046] Next, use Figure 2A with Figure 2B Example 2 of the present invention will be described.

[0047]2 shows that a three-phase three-column wound core is used, and around the tap part 202 of the coil 201, a thermosetting resin-impregnated fiber 205A is wound in the coil axial direction, and then wound in the horizontal direction of the outermost layer of the coil 201. A perspective view of a coil core assembly of thermosetting resin-impregnated fibers 205B is shown.

[0048] Figure 2A Among them, 201 represents the coil, 202 represents the lead-out part of the branch line, 203 represents the core, 203A represents the outer core, 203B represents the inner core, 204A is the upper fastener, 204B is the lower fastener, 205A is the coil axial The thermosetting resin impregnated fiber wound on top, 205B is the thermosetting resin impregnated fiber wound on the outermost layer of the coil.

[0049] In addition, in Fig. 2, it is shown that the high-voltage (primary side) an...

Embodiment 3

[0053] Next, use Figure 3A with Figure 3B Embodiment 3 of the present invention will be described.

[0054] Figure 3A Indicates that a three-phase three-column laminated core is used, and a thermosetting resin-impregnated fiber 305A is wound around the tap part 302 of the coil 301 in the axial direction of the coil, and then a thermosetting resin impregnated fiber 305A is wound in the horizontal direction of the outermost layer of the coil 301. A perspective view of the coil core assembly of the resin-impregnated fiber 305B.

[0055] In Fig. 3, 301 is a coil, 302 is a branch wire lead-out part, 303 is a laminated iron core, 304A is an upper fastener, 304B is a lower fastener, 305A is a thermosetting resin impregnated fiber around the tap part 302, and 305B is The outermost layer of the coil is impregnated with thermosetting resin in the horizontal direction.

[0056] Figure 3 shows a coil 301 formed by winding a flat wire or a round wire around a high voltage (primary s...

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Abstract

The present invention is intended, in view of eliminating the possibility of destroying the insulation of varnished coils, to address the weakening of the mechanical strength in the coil axis direction in time of short circuiting in the manufacturing process of coils without varnishing. The invention relates to an oil-filled transformer mounted with an iron core formed of an amorphous ribbon or a silicon steel sheet and a coil of which both high-voltage and low-voltage windings are formed of flat or round conductor lead wires wound around the iron core, in which a thermosetting resin-impregnated fiber is wound in the coil axis direction around the coil in a tap line wire lead part, and further the thermosetting resin-impregnated fiber is wound in the outermost layer of the coil. As the thermosetting resin-impregnated fiber, a glass binding tape made of epoxy resin is used.

Description

technical field [0001] The invention relates to an oil-immersed transformer, in particular to a coil. Background technique [0002] Recently, regarding oil-immersed transformers, transformers having cylindrical coils made of flat wires or round wires as high-voltage (primary side) and low-voltage (secondary side) windings for floating offshore wind power generation have been developed. [0003] In addition, the high-voltage (primary side) and low-voltage (secondary side) cylindrical coils of the transformer, which are made of flat wires, are painted to improve mechanical strength during short-circuit. However, in the floating transformer for offshore wind power, stress is applied to coil end faces due to swaying of the sea surface due to waves, and there is a possibility that coil insulation may be broken. [0004] In addition, the iron core of the transformer has an amorphous iron core and a silicon steel core. Handled coils may damage the insulating paper inside the coil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/30H01F5/04H01F27/28H01F27/32H01F30/00H01F30/12H01F41/12
CPCH01F27/28H01F27/30H01F27/32H01F30/12
Inventor 御子柴谅介远藤博之筱原诚高桥俊明佐藤辰则
Owner HITACHI IND EQUIP SYST CO LTD