JP2021168585A - Coil of rotary electric machine and stator of rotary electric machine - Google Patents

Abstract

To provide a coil of a rotary electric machine constituted to perform a wire connecting work without using enamel coat and to insulate a single conducting wire or a plurality of conducting wires in the coil to be attached in a slot of a stator core of the rotary electric machine and a stator of the rotary electric machine with the coil attached to its slot.SOLUTION: The present invention provides a coil 10 of a rotary electric machine using a metal-made, long-sized, single conducting wire 1 or a plurality of conducting wires 1 bundled in a laminated state. The coil 10 consists of an insulation layer 2 in which a resin coat by electrophoretic coating is formed on the outer periphery of an intermediate area part of the conducting wire 1, and an insulation exterior body 3 formed on the surface of the insulation layer 2. The length L1 of the insulation layer 2 is made shorter than the entire length L of the conducting wire 1 and longer than the length L2 of the insulation exterior body 3. The present invention also provides a stator of the rotary electric machine with the coil 10 attached to its slot.SELECTED DRAWING: Figure 1

Description

The present invention relates to a winding and a stator of a rotating electric machine in which a winding is mounted in a slot of a stator of a rotating electric machine such as a generator or an electric motor.

In windings to be mounted in the slots of stators of rotary electric machines such as generators and electric motors, windings of rotary electric machines that perform wire connection work using insulated conductors are known.

For example, as shown in Patent Document 1, the stator winding is a flat wire, and the U-shaped portion is formed in advance using a mold or the like, and the stator winding is inserted into a stator core having slot insulation from the axial direction. Then, the straight portion is inserted into the two slots separated by straddling the plurality of slots. Before the coil end is inserted into the stator core, the stator of the rotary electric machine to be connected by peeling off the insulating film at both ends is described in advance.

However, in the stator of the rotary electric machine according to Patent Document 1, it is necessary to peel off the insulating film at the end of the coil by a peeling method such as a cutter.

Further, the winding of the rotary electric machine is configured by inserting two conductor segments into each slot of the stator core and connecting the ends of the conductor segments inserted into different slots to each other. The conductor segment has an insulating coating structure of two or more layers in which an enamel coating is applied to the conductor and an insulating coating is applied on the enamel coating. At the end of the conductor segment, the enamel coating and the insulating coating are removed to remove the conductive wire. The stator of the rotating electric machine that is exposed is described.

However, in the stator of the rotary electric machine according to Patent Document 2, it is necessary to remove the insulating film at the end of the coil as in Patent Document 1, and further, it is necessary to remove the enamel film as well.

Japanese Unexamined Patent Publication No. 2012-139075 (Specifications [0026] and [0029]) Japanese Unexamined Patent Publication No. 2011-152001 (Specifications [0024], [0036])

In the present invention, in order to solve the above problems, wiring work can be performed without using an enamel coating, and a single conductor or a winding of a rotary electric machine that insulates a plurality of conductors is mounted. It is an object of the present invention to provide a stator of a rotary electric machine.

The invention according to claim 1 relating to the winding of a rotary electric machine of the present invention is a winding of a rotary electric machine using a long conductor made of a metal material and a single conductor or a plurality of conductors bundled in a laminated state. The length of the insulating layer is composed of an insulating layer having a resin film formed by electrodeposition coating on the outer periphery of an intermediate region portion of the conducting wire and an insulating exterior body formed by surrounding the surface of the insulating layer. It is characterized in that it is formed to be shorter than the total length of the conducting wire and longer than the length of the insulating exterior body. The invention according to claim 2 relating to the winding of the rotary electric machine of the present invention is characterized in that the insulating exterior body of the winding of the rotary electric machine according to claim 1 is made of a foamable material. The invention according to claim 3 according to the stator of the rotary electric machine of the present invention is characterized in that the winding of the rotary electric machine according to claim 1 or 2 is mounted in the slot of the stator of the rotary electric machine.

In the winding of a rotating electric machine using a long-shaped, single conductor or a plurality of conductors bundled in a laminated state, which is made of the metal material of the present invention, a resin by electrodeposition coating is applied to the outer periphery of an intermediate region portion of the conductor. It is composed of an insulating layer on which a coating is formed and an insulating exterior body formed by surrounding the surface of the insulating layer, and the length of the insulating layer is shorter than the total length of the conducting wire and longer than the length of the insulating exterior body. Since it is formed by the above, it is not necessary to use an enamel film and to peel off or remove the insulation at the end of the conducting wire in the connection work, and to insulate a single conducting wire or a plurality of conducting wires. The winding of the rotary electric machine can be provided, the winding of the rotary electric machine can be mounted in the slot of the stator of the rotary electric machine to provide the stator of the rotary electric machine, and the insulating exterior body is foamable. By using a certain material, it is possible to provide a stator of a rotary electric machine in which windings are closely attached via an insulating outer body in a slot of a stator core of the rotary electric machine.

It is sectional drawing which shows Embodiment 1 in the winding | winding of the rotary electric machine which used the single conducting wire of this invention. FIG. 5 is a cross-sectional view taken along the line XX of FIG. It is sectional drawing which shows Embodiment 2 in the winding | winding of the rotary electric machine which used the single conducting wire of this invention. It is a top view which shows Embodiment 1 in the winding of the rotary electric machine which used the plurality of conductors of this invention. It is a cross-sectional view of YY of FIG. It is the same cross-sectional view which shows Embodiment 2 in the winding | winding of the rotary electric machine which used the plurality of conductors of this invention. FIG. 5 is a plan view in which the winding of the present invention is mounted in a slot of a stator of a rotary electric machine. FIG. 7 is a cross-sectional view taken along the line ZZ of FIG.

Hereinafter, the winding of a rotary electric machine using a long conducting wire made of the metal material of the present invention will be described with reference to the drawings. Hereinafter, in the present invention, insulation means electrical insulation.

(Embodiment 1 of winding of a rotary electric machine using a single conducting wire)
1 and 2 show a first embodiment of a rotary electric machine winding in which the surface of an insulating layer is surrounded in an intermediate region portion of a conducting wire.

In FIGS. 1 and 2, the winding 10 is formed of an insulating layer 2 made of a metal material and having a resin film formed by electrodeposition coating on the outer periphery of an intermediate region portion of a single conducting wire 1 and an insulating layer 2 thereof. It is made of an insulating exterior body 3 whose surface is surrounded.

This conductor 1 is made of an electrically conductive metal material such as copper (containing alloy) and aluminum (containing alloy), and is a flat plate having a rectangular cross section as an example. good. It should be noted that this conductor 1 has a long shape, and hereinafter, even if the conductor 1 is not described in the long shape, it means the long conductor 1.

Further, the insulating layer 2 is formed by forming a resin film having a thickness of 10 to 80 μm on the surface of the conducting wire 1 over a length L1 by electrodeposition coating, and as this resin, an epoxy resin, a polyester resin, a polyimide resin or the like is used. Although not shown, the conductor wire is immersed in the resin electrodeposition liquid tank described in Japanese Patent Application Laid-Open No. 2013-117502 to produce a coated conductor wire, and the resin electrodeposition liquid tank is formed in the region of the length L1 of the conductor wire 1. By immersing the conductor 1 in the conductor 1, an insulating layer 2 having a resin film of length L1 formed on the outer periphery of the conductor 1 is obtained, and the insulating layer 2 thus obtained by electrodeposition coating has a substantially uniform thickness. Since it is a resin coating, an insulating layer 2 having a substantially uniform thickness is formed on the outer periphery of the surface of the conducting wire 1. Further, after the winding 10 is mounted in the slot of the stator of the rotary electric machine, the conducting wire 1 of the winding 10 mounted in the slot is bent outside the slot and connected to the end portion 1A, so that the total length of the conducting wire 1 is connected. Assuming that L is the length M from the end 1A of the conductor 1 to the base where the conductor 1 is bent, the relationship with the length L1 of the insulating layer 2 is given by the equation (1).
L1 = L-2M ... (1)

The surface of the insulating layer 2 formed by the electrodeposition coating is surrounded by the insulating exterior body 3, the length of the insulating exterior body 3 is in the intermediate region portion of the conducting wire 1, and the winding 10 is of a rotary electric machine. Since it corresponds to the area mounted on the slot lot of the stator, if the total length of the conducting wire 1 is L and the length of the insulating exterior 3 is L2, the relationship with the length L1 of the insulating layer 2 is given by the equation (2). It becomes.
L2 <L1 <L ... (2)
Further, the thickness of the insulating exterior 3 may be wound around the surface of the insulating layer 2 by using an insulating sheet material having a thickness of 5 μm to 300 μm, but the liquid or powdery insulating material is preferably foamable insulation. The material may be formed by applying or spraying the material on the surface of the insulating layer 2. The material of the insulating exterior 3 is a thermoplastic resin such as polyphenylene sulfide resin, polyethylene naphthalate resin, polyethylene terephthalate resin, polyester resin, polyamide resin or liquid crystal polymer, or a thermosetting resin such as epoxy resin, polyimide resin or fluororesin. Further, an aramid paper such as DuPont's trade name Nomex and a foamable material that expands and expands when heated can be exemplified.

(Embodiment 2 of winding of a rotary electric machine using a single conducting wire)
FIG. 3 shows a second embodiment of a winding electric machine winding in which the surface of an insulating layer is surrounded in an intermediate region portion of a long single conducting wire.

In FIG. 3, the winding 11 is insulated by forming a resin film by electrodeposition coating on the outer periphery of an intermediate region portion of a single conducting wire 1 having a long shape made of a metal material having a rectangular cross section, as in the first embodiment. The layer 2 is made of an insulating exterior body 3 in which the surface of the insulating layer 2 is surrounded. The difference from the first embodiment is that the conducting wire 1 has two insulating layers 2, the insulating layers 2 are separated from each other on the left and right by a length N, and the surfaces of the two insulating layers 2 are each an insulating exterior body. The winding 10 is formed by being surrounded by 3. In this winding 10, by pressing the center of the separated portion in the direction of the arrow, the winding 11 is bent in a substantially U shape, and the winding 11 is mounted in the slot of the stator of the rotary electric machine. After the winding 11 is mounted in the slot of the stator of the rotary electric machine, the lead wire 1 of the winding 11 mounted in the slot is bent outside the slot and connected to the end portion 1A. Therefore, let the length M from the end 1A of the conductor 1 to the base where the conductor 1 is bent, the total length of the conductor 1 be L, the length of the insulating exterior 3 be L2, and the length N separated to the left and right. The relationship between the insulating layer 2 and the length L1 is given by the equation (3).
L1 = L / 2-M-N / 2 ... (3)
Further, the insulating exterior body 3 surrounding the surface of the insulating layer 2 formed by the electrodeposition coating is located in the intermediate region portion of the conducting wire 1 and is located in the region where the winding 11 is mounted in the stator slot of the rotary electric machine. Therefore, assuming that the total length of the conducting wire 1 is L and the length of the insulating exterior body 3 is L2, the relationship with the length L1 of the insulating layer 2 is given by the equation (4).
L2 <L1 <L / 2 ... (4)

(Embodiment 1 of winding of a rotary electric machine in which conductors are bundled in a laminated state)
4 and 5 show windings of a rotary electric machine in which conductors are bundled in a laminated state at an intermediate region portion of a plurality of long conductors.

In FIGS. 4 and 5, the winding 10 is composed of windings 10A, 10B, 10C, and 10D, and each of the windings 10A, 10B, 10C, and 10D is a winding electric wire 10 using a single conductor 1. Similar to the first embodiment, the insulating layer 2 has a resin film formed by electrodeposition coating on the outer periphery of a long conducting wire 1 made of a metal material having a rectangular cross section. The surfaces of the respective insulating layers 2 of the windings 10A, 10B, 10C, and 10D are surrounded by the insulating exterior body 3 and bundled in a laminated state, so that the conducting wires 1 are connected between the adjacent windings 10A, 10B, 10C, and 10D. In the intermediate region part of the above, the part is insulated by the insulating layer 2, but in the part other than the part where the insulating layer 2 of the conductor 1 is formed (the part from the base where the conductor 1 is bent to the end 1A of the conductor 1). A non-insulated space 4 is formed.

This conducting wire 1 is made of an electrically conductive metal material such as copper (including alloy) and aluminum (including alloy), and has a shape similar to that of the winding 10 of a rotating electric machine using a single conducting wire 1. A flat conductor having a rectangular cross section is illustrated as a flat conductor, but a round conductor may also be used. Further, although the number of conductors 1 is shown in the figure, it may be a winding in which four or more conductors are bundled in a laminated state.

The insulating layer 2 is formed by forming a resin film having a thickness of 10 to 80 μm by electrodeposition coating in the same manner as the winding 10 of a rotary electric machine using a single conductor 1, and this electrodeposition coating is formed by forming the conductor 1 as a single body. It may be performed every time, but it may be performed in a state where the conductors 1 are laminated. The thickness of the insulating layer 2 formed by such electrodeposition coating is uniformly formed on the outer periphery of the intermediate region portion of the conducting wire 1.

The insulating exterior 3 has a configuration in which the surface of the insulating layer 2 is surrounded and bundled in a laminated state so as to join the insulating layers 2 of the adjacent conductors 1, and is not shown in order to provide the configuration of the insulating exterior 3. However, it may be wound with an insulating sheet material having a thickness of 5 μm to 300 μm. Further, as the material thereof, the heat of polyphenylene sulfide resin, polyethylene naphthalate resin, polyethylene terephthalate resin, polyester resin, polyamide resin, liquid crystal polymer, etc. is the same as the material of the winding 10 of the rotary electric machine using the single lead wire 1. Examples include heat-curable resins such as plastic resins, epoxy resins, polyimide resins, and fluororesins, as well as aramid paper such as DuPont's trade name Nomex, and foamable materials that expand and expand when heated.

(Embodiment 2 of winding of a rotary electric machine in which conductors are bundled in a laminated state)
FIG. 6 shows a winding of a rotary electric machine in which conductors 1 and an insulating layer 2 similar to those in the first embodiment are used and the conductors are bundled in a laminated state at an intermediate region portion of a plurality of long conductors.

In FIG. 6, the winding 10 is composed of windings 10A, 10B, 10C, and 10D as in the first embodiment, but is different from the first embodiment so that the insulating layers 2 of the adjacent conductors 1 are joined. Insulating exterior body 3 that surrounds the surface of the insulating layer 2 and bundles them in a laminated state. It is composed of a second insulating exterior body 32 that surrounds 10A, 10B, 10C, and 10D and bundles them in a laminated state. The first insulating exterior body 31 and the second insulating exterior body 32 are sheet materials having an insulating property having a thickness of 5 μm to 300 μm, and are made of the same material as that of the first embodiment. In this case, in order to insulate between the adjacent windings 10A, 10B, 10C, and 10D by the first insulating exterior body 31, it may be performed at the same time when the second insulating exterior body 32 bundles the windings in a laminated state. Insulating material A foaming insulating material may be filled between the adjacent windings 10A, 10B, 10C, and 10D, and then bundled in a laminated state by the second insulating exterior body 32. The second embodiment of the winding 10 of the rotary electric machine in which the conducting wires 1 are bundled in a laminated state has improved insulation between the adjacent windings 10A, 10B, 10C, and 10D as compared with the winding 10 of the first embodiment.

(Embodiment of Stator of Rotating Electric Machine)
In this way, a winding of a rotating electric machine using a long single conducting wire 1 or a plurality of conducting wires 1 bundled in a laminated state is formed, and the winding is mounted in a slot of a stator of the rotating electric machine. An embodiment of providing a stator of a rotary electric machine capable of performing wire connection work will be described below with reference to FIGS. 7 and 8.

7 and 8 show a rotation in which a winding 10 composed of a plurality of windings 10A, 10B, 10C, and 10D in which a plurality of conducting wires 1 are bundled in a laminated state is mounted in a slot 51 of a stator 5 of a rotary electric machine. Although the stator 5 of the electric machine is shown, the rotations 10 and 11 (described in FIGS. 1 to 3) of the rotary electric machine using the single lead wire 1 are also rotated in the slot 51 of the stator 5 of the rotary electric machine. It may be the stator 5 of the electric machine. A plurality of slots 51 of the stator 5 of the rotary electric machine are formed in an annular shape, and some of them are shown in FIGS. 7 and 8.

In FIGS. 7 and 8, in the winding 10 of the rotary electric machine bundled in a laminated state, the adjacent windings 10A, 10B, 10C, and 10D are bundled in a laminated state by the insulating exterior body 3, and the intermediate region portion of the conducting wire 1 is formed. Is arranged in the slot 51 of the stator 5. In this case, since the insulating layer 2 is formed in the intermediate region portion of the elongated conductor 1, the conductor 1 in which the insulating layer 2 is formed without being surrounded by the insulating exterior 3 is inserted into the slot of the stator 5. Although not shown, the sheet-shaped insulating exterior 3 may be arranged in advance in the slots 51 so that the winding machine 10 of the rotary electric machine is mounted in each slot 51. A filler such as an epoxy resin may be injected into the 51 to form an insulating exterior body 3, and the winding 10 of the rotary electric machine may be mounted in each slot 51.

In this way, the insulating exterior 3 surrounding the insulating layer 2 is formed in the intermediate region portion of each of the conductors 1 of the windings 10A, 10B, 10C, and 10D, and the winding 10A is formed through the insulating exterior 3. 10B, 10C, and 10D are mounted in a plurality of slots 51 of a stator 5 made of an iron core in an annular shape of a rotary electric machine. Further, a space portion 4 is formed at a portion extending from the base where the long conductor 1 is bent to the end 1A of the conductor 1, so that the conductor 1 can be bent, and an insulating layer is formed at the end 1A of the conductor 1. Since the wires 2 are not formed, when the conductor 1 is bent in the wire connection work, the work can be performed without impairing the insulation of the conductors 1 of the adjacent windings 10A, 10B, 10C, and 10D. This has the effect of not requiring the work of peeling or removing the insulation of the end portion 1A, and the insulating layer 2 is cheaper than the enamel coating because a resin film having a substantially uniform thickness is formed by electrodeposition coating. The insulating layer 2 can be provided.

The winding of the rotary electric machine of the present invention is useful as a winding to be mounted in a stator slot of a rotary electric machine such as a generator or an electric machine.

1 Conductor 2 Insulation layer 3 Insulation exterior 5 Stator 51 Slots

Claims (3)

In the winding of a rotating electric machine that uses a single conductor or a plurality of conductors bundled in a laminated state with a long shape made of a metal material, a resin film is formed by electrodeposition coating on the outer periphery of the intermediate region portion of the conductor. The insulating layer is formed of an insulating outer layer formed by surrounding the surface of the insulating layer, and the length of the insulating layer is shorter than the total length of the conducting wire and longer than the length of the insulating outer body. The winding of a rotating electric machine, which is characterized by being made of. The winding of a rotary electric machine according to claim 1, wherein the insulating exterior body is made of a foamable material. A stator of a rotary electric machine according to claim 1 or 2, wherein the winding of the rotary electric machine is mounted in a slot of the stator of the rotary electric machine.

Images