Transformers

Abstract

To provide a transformer capable of safely and quickly cutting a sheath to achieve an electrical connection when a lead wire is covered by a thick sheath.SOLUTION: A transformer includes an iron core, a coil wound around the iron core, a lead wire 8a connected to the coil and covered with a resin coating portion 8b, and a connector for connecting the lead wire 8a. The connector has a protrusion 9c that presses against the coating portion 8b.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present technology relates to transformers. [Background technology]

[0002] A connecting member has been proposed in which a protrusion is formed on one side of a plate-shaped crimping part, the crimping part is curved, the one side covers an aluminum electric wire, and the crimping part is crimped to the electric wire, thereby electrically connecting the electric wire to another component. The electric wire is covered with an enamel layer, but by pressing the protrusion against the wire, the enamel layer is cut, enabling electrical connection. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6440277 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when an electric wire is covered with a resin coating that is thicker than the enamel layer, it is necessary to use a chemical to remove the coating before connecting the electric wire. Only a limited number of workers can handle the chemicals, and the chemicals are toxic. In addition, the coating must be immersed in the chemicals for a long time to remove them.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a transformer that can achieve electrical connection by safely and quickly cutting a coating portion when a conductor is covered with a thick coating portion. [Means for solving the problem]

[0006] The transformer according to the present disclosure comprises an iron core, a coil wound around the iron core, a conductor connected to the coil and covered with a resin coating, and a connector for connecting the conductor, the connector having a protrusion for pressing the coating.

[0007] In the present disclosure, the resin coating is pressed and cut by the projection, and the conductive wires inside the coating are electrically connected to another component.

[0008] In the transformer according to the present disclosure, the connector connects the conductor to a power line that supplies electric power.

[0009] In the present disclosure, a connector having a protrusion is used to connect a conductor wire and a power line, enabling quick connection work.

[0010] The transformer according to the present disclosure includes a tap changer, and the connector connects the conductor to the tap changer or a connection line from the tap changer.

[0011] In the present disclosure, a connector having a protrusion is used to connect a conductor to a tap changer or a connection line from the tap changer, thereby enabling quick connection work. Effect of the Invention

[0012] In the transformer according to the present disclosure, the resin coating is pushed and cut by the protrusion, and the conductor inside the coating is electrically connected to other components. The connection work of removing the coating can be performed without using chemicals, and the connection work can be performed safely and in a short time. [Brief description of the drawings]

[0013] [Figure 1] 1 is a simplified front view of a transformer according to a first embodiment. [Diagram 2] FIG. [Diagram 3] 4 is a schematic cross-sectional view of a power line and a coupling line, and a first connecting line and a second connecting line, which are crimped to a connecting tool. FIG. [Figure 4]FIG. 11 is a simplified perspective view of a connector according to a second embodiment. [Diagram 5] FIG. 4 is a schematic plan view of a tap changer and a second connection line connected via a connector. [Figure 6] 4 is a schematic cross-sectional view of a plurality of second connection lines crimped to a connection tool. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (Embodiment 1) The present invention will be described below with reference to the drawings showing a transformer according to embodiment 1. Fig. 1 is a simplified front view of the transformer. The transformer 1 includes a rectangular ring-shaped iron core 2 and a coil 3 wound around a long side of the iron core 2. The iron core 2 protrudes from both ends of the coil 3.

[0015] A support base 4 is provided at one end of the coil 3 so as to cover the iron core 2. The support base 4 supports a tap changer 6 via a connector 5. The tap changer 6 is provided with a plurality of tap terminals 6a that pass through the tap changer 6 from top to bottom. One ends of a plurality of first connection wires 11 are connected to the lower sides of the tap terminals 6a. One end of a second connection wire 12 is connected to the coil 3. The other ends of the first connection wire 11 and the second connection wire 12 are connected via a connector 9.

[0016] Electric power is supplied to the coil 3 from an external power supply unit (not shown). The power supply unit and the coil 3 are connected via a power line 7 and a connecting line 8. One end of the power line 7 is connected to the power supply unit via a bushing 51 of the case cover 50. One end of the connecting line 8 is connected to the coil 3. The other ends of the power line 7 and the connecting line 8 are connected via a connector 9.

[0017] 2 is a schematic perspective view of the connector 9. The connector 9 has a cylindrical crimping portion 9a, and a plurality of recesses 9b are formed on the outer circumferential surface of the crimping portion 9a. The recesses 9b are formed by a punch, and a plurality of protrusions 9c are formed on the opposite side of the recesses 9b, i.e., on the inner circumferential surface of the crimping portion 9a.

[0018] 3 is a schematic cross-sectional view of the power line 7 and the connecting line 8, as well as the first connecting line 11 and the second connecting line 12, which are crimped to the connector 9. The power line 7 has a conductor 7a made of, for example, a copper wire, and a coating 7b that coats the conductor 7a. The connecting line 8 has a conductor 8a made of, for example, an aluminum wire, and a resin coating 8b that coats the conductor 8a. The coating 8b has a thickness of, for example, about 0.3 mm to 0.8 mm. In general, the thickness of the enamel layer is 0.003 to 0.035 mm, and the thickness of the coating is sufficiently larger than the thickness of the enamel layer.

[0019] When the power line 7 is inserted into one end of the connector 9, the connecting wire 8 is inserted into the other end of the connector 9, and the connector 9 is crimped to the power line 7 and the connecting wire 8 using a tool, the protrusions 9c press against the periphery of the power line 7 and the connecting wire 8, and the conductors 7a, 8a break through the coverings 7b, 8b between the multiple protrusions 9c and come out to the outside.

[0020] The first connection wire 11 includes a metal conductive wire 11a and a resin coating portion 11b that covers the conductive wire 11a. The second connection wire 12 includes a metal conductive wire 12a and a resin coating portion 12b that covers the conductive wire 12a.

[0021] When a first connecting wire 11 is inserted into one end of the connecting device 9, a second connecting wire 12 is inserted into the other end of the connecting device 9, and the connecting device 9 is crimped to the first connecting wire 11 and the second connecting wire 12 using a jig, as described above, the conductor 11a of the first connecting wire 11 breaks through the coating portion 11b and connects to the connecting device 9, and the conductor 12a of the second connecting wire 12 breaks through the coating portion 12b and connects to the connecting device 9.

[0022] In the transformer according to the first embodiment, the projection 9c presses and cuts the resin coatings 7b, 8b, 11b, and 12b, and electrically connects the conductors 7a, 8a, 11a, and 12a in the coatings 7b, 8b, 11b, and 12b to other components. The connection work of removing the coatings 7b, 8b, 11b, and 12b can be performed safely and in a short time without using chemicals.

[0023] Furthermore, a connector 9 having a protrusion 9c is used to connect the conductor 8a and the power line 7, thereby enabling quick connection work. Furthermore, a connector 9 having a protrusion 9c is used to connect the second connection line 12 from the coil 3 and the first connection line 11 from the tap changer 6, thereby enabling quick connection work.

[0024] Similarly, quick connection work can be achieved by inserting a first connection line 11 into one end of the connection device 9, inserting a second connection line 12 into the other end of the connection device 9, and crimping the connection device 9 to the first connection line 11 and the second connection line 12.

[0025] (Embodiment 2) Hereinafter, the present invention will be described with reference to the drawings showing a transformer according to embodiment 2. Among the configurations of embodiment 2, the same configurations as those of embodiment 1 are given the same reference numerals, and detailed description thereof will be omitted. In embodiment 1, the first connection line 11 and the second connection line 12 are connected, but in embodiment 2, the first connection line 11 is not used, and the second connection line 12 is connected to the tap changer 6 via a connector 10.

[0026] 4 is a schematic perspective view of the connector 10. The connector 10 is made of a soft metal material, such as a copper material or a copper alloy material. The connector 10 includes a gutter-shaped crimping portion 10a and a tongue portion 10c protruding from one end of the crimping portion 10a. A plurality of protrusions 10b are formed on the inner surface of the crimping portion 10a. A through hole is formed in the tongue portion 10c.

[0027] FIG. 5 is a schematic plan view of the tap changer 6 and the second connection wire 12 connected via the connector 10, and FIG. 6 is a schematic cross-sectional view of a plurality of second connection wires 12 crimped to the connector 10. A case where two second connection wires 12 and a tap terminal 6a are connected will be described. The ends of the two second connection wires 12 are placed inside the crimping portion 10a, and the two second connection wires 12 are wrapped by the crimping portion 10a using a jig, and the crimping portion 10a is crimped. The protrusions 10b press the periphery of the second connection wire 12, and the conductor 12a breaks through the covering portion 8b between the plurality of protrusions 10b and comes out to the outside. The conductor 12a is connected to the crimping portion 10a.

[0028] Then, the tongue portion 10c is connected to the underside of the tap terminal 6a. For example, a female screw (not shown) is formed at the lower end of the tap terminal 6a. The tongue portion 10c is arranged under the tap terminal 6a so that the through hole 10d is arranged coaxially with the female screw, and a bolt (not shown) is inserted into the through hole 10d and coupled to the bolt. The tongue portion 10c is held between the head of the bolt and the tap terminal 6a, and the tongue portion 10c is connected to the tap terminal 6a.

[0029] Alternatively, a male screw may be formed at the lower end of the tap terminal 6a, the male screw may be inserted into the through hole 10d, and a nut may be attached to the male screw to connect the tongue portion 10c and the tap terminal 6a. Three or more second connection wires 12 or a single second connection wire 12 may be connected to the tap terminal 6a via the connector 10.

[0030] In the second embodiment, tongue portion 10c of connector 10 is directly connected to tap terminal 6a, so that first connection wire 11 can be eliminated and quick connection work can be achieved.

[0031] The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of the claims and the scope equivalent to the claims. [Explanation of symbols]

[0032] 1 transformer 2 core 3 coil 6 tap changer 7 power line 8 connecting line 8a Conductor 8b Covering portion 9, 10 Connector 9a, 10a Crimping portion 9c, 10b protrusion 11 first connecting line (connecting line) 12 second connecting line

Claims

1. Iron core and A coil wound around the iron core; A conducting wire connected to the coil and covered with a resin coating having a thickness of 0.3 mm to 0.8 mm; A connector for connecting the conductor and having one surface; Equipped with The connector has a plurality of protrusions on the one surface, the protrusions pressing against the covering portion and protruding in a direction intersecting the one surface, and no recesses or holes are formed on the one surface or the protrusions, The connector is crimped to the conductor, and the conductor breaks through the coating between the projections and is connected to the connector. Transformer.

2. The connector connects the conductor to a power line that supplies electric power.

2. The transformer of claim 1.

3. Equipped with a tap changer, The connector connects the conductor to the tap changer or a connection line from the tap changer. Connect 2. The transformer of claim 1.

Images