JP2013132173A - Stator of rotary electric machine - Google Patents

Abstract

To reduce the diameter of a stator of a rotating electrical machine.
A stator 1 of a rotating electrical machine is configured by arranging an even number of coils 3 arranged in a ring shape by winding a conducting wire around a core 2. A conducting wire is drawn from each coil 3, and the drawn conducting wire is wound along the outer periphery of the stator 1 to form a connecting wire 8. The connecting wire 8 is bundled at a predetermined location to form a bundled portion 9. The connecting wire 8 is divided into two at the position X facing the bundled portion 9, and is wound around the outer periphery of the stator 1 toward the corresponding circumferential direction side.
[Selection] Figure 1

Description

  The present invention relates to a stator of a rotating electrical machine that is an electric motor or a generator.

  Conventionally, rotating electric machines that are electric motors and generators are known. The rotating electrical machine is composed of a stator and a rotor. The stator is configured by arranging a plurality of coils formed by winding a conducting wire around a core in an annular shape and press-fitting the stator holder (see, for example, Patent Document 1).

  A conductive wire is drawn from each coil and wound around the outer periphery of the stator to form a crossover. The core includes a core body and an insulating member that fits into the core body. Each insulating member is provided with a housing portion that is positioned on the outer periphery of the stator and houses the crossover. The crossover wires are bundled at a predetermined location, thereby forming a bundled portion, and a terminal is provided on the bundled portion.

JP 2009-278848 A

  The number of connecting wires wound around the outer periphery of the stator increases as the bundled portion is approached. And, it is most efficient in the manufacture of the core and the assembly of the stator that all the cores are configured in the same shape, and the accommodating portion for accommodating the jumper wires corresponds to the place where the jumper wires are the largest. Need to be configured.

  Accordingly, the accommodating portion located farthest from the bundling portion corresponds to the place with the largest number of crossover lines although the number of crossover lines is small, and as a result, the diameter of the stator increases. There is a problem that it ends up.

  In view of the above, an object of the present invention is to reduce the diameter of a stator in which a crossover is wound around the outer circumference without reducing manufacturing efficiency and assembly efficiency.

  In order to achieve the above object, the present invention is a stator for a rotating electrical machine configured by arranging an even number of coils formed by winding a conducting wire around a core in an annular shape, and the stator is drawn from each coil. A conductor is provided as a connecting wire along the outer periphery of the stator, and the connecting wire is provided with a binding portion formed by binding the connecting wire at a predetermined position on the outer periphery of the stator, and the core accommodates the connecting wire. The accommodating portions are respectively provided in the same shape, and the connecting wire is divided into two in the circumferential direction at a position facing the bundled portion on the outer periphery of the stator, and the outer periphery of the stator is directed toward the corresponding circumferential side. It is wound around.

  According to such a configuration, the outer periphery of the stator is wound toward the circumferential direction corresponding to the two in the circumferential direction at a position facing the bundled portion, so that the stator is separated from the portion adjacent to the bundled portion. The maximum number of crossovers in the vicinity of the bundling portion can be reduced as compared with the case where the outer circumference of the bundling is made around the bundling portion. Accordingly, the accommodating portion of the core can be reduced, and the diameter of the stator can be reduced.

  In addition, since the number of coils is an even number, the coil lead lines can be divided into two so that the number is equal when divided into two at the position facing the bundling portion. As a result, compared to the case where the odd number of coils is divided into two, by forming the accommodating portion in accordance with the direction where there are many connecting wires in the vicinity of the bundling portion, there is an extra portion in the vicinity of the connecting portion where there are few connecting wires. It is possible to prevent the generation of a part of the accommodating portion.

  Further, in the present invention, if the connecting wire includes a connecting wire for a midpoint for connecting and connecting the midpoints, the connecting wire is divided into two at a position facing the bundling portion of the connecting wire for the midpoint, It is preferable that the outer periphery of the stator is wound around the corresponding circumferential direction.

  In the case of a stator having a plurality of phase currents, the bundling portion provided with the terminals for the power supply lines winds the outer periphery of the stator for each phase current by the number of coils divided by the number of phase currents. Will be. However, when the midpoint is provided on the outer periphery, the midpoint is drawn from all the coils, so that the number of jumper wires wound is the largest in the bundled portion.

  Therefore, as described above, the crossover line is divided into two in each direction in the circumferential direction at a position facing the bundling portion of the middle-point crossover wire with the largest number of windings, and the crossover line is directed toward the bundling portion. By drawing around, the diameter of the stator can be reduced as compared with the case where the two parts are drawn from the position shifted from the position facing the bundling portion.

  Further, in the present invention, a plurality of accommodating portions are provided so as to accommodate the jumper wires separated for each phase current, and the accommodating portions are formed to a depth proportional to the number of the jumper wires to be accommodated. It is preferable that the crossover wires corresponding to the portions are wound around the accommodating portions so as to be laminated in the radial direction of the stator.

  According to such a configuration, the accommodating portion has a depth that is necessary and sufficient to accommodate the jumper wire, and the diameter of the stator can be minimized.

The schematic diagram which shows one Embodiment of the stator of this invention. The perspective view which shows typically the insulating member of the core of this embodiment. Sectional drawing which shows the accommodating part of this embodiment typically.

  As shown in FIG. 1, a stator 1 according to an embodiment of the present invention is used for a three-phase motor as a rotating electric machine as an electric motor or a generator, and is configured by winding a conducting wire around a core 2. The coils 3 are arranged in a ring shape and press-fitted into the stator holder 4.

  The core 2 includes a rectangular core body 5 and an insulating member 6 (see FIG. 2) that fits into the core body 5 so as to cover the outer periphery of the core body 5. As shown in FIG. 2, the insulating member 6 is U-shaped, and includes a winding portion 6 a around which the conductive wire is wound to form the coil 3, and a fitting portion 6 b that fits into the core body 5. . Four accommodating portions 7 a to 7 d arranged in the direction of the central axis of the stator 1 are provided on the outer peripheral edge of the insulating member 6.

  Since an even number of coils 3 are provided and the stator 1 of the present embodiment is a three-phase alternating current, the number of coils 3 is set to a multiple of six. Two conducting wires are drawn from each coil 3, and the drawn conducting wires are wound around the outer periphery of the stator 2 to form a crossover wire 8. One of the conductive wires drawn out from each coil 3 becomes a midpoint crossover wire 8a, and the other one becomes a crossover wire 8b, 8c, 8d for allowing the corresponding phase current of the coil 3 to flow.

  The connecting wire 8 is accommodated in a groove-shaped accommodating portion 7 that opens outward in the radial direction of the stator 1. As shown in FIG. 3, the accommodating portion 7a accommodates the midpoint connecting wire 8a, the accommodating portion 7b accommodates the U-phase connecting wire 8b, and the accommodating portion 7c serves as the V-phase connecting wire. 8c is accommodated, and the accommodating part 7d accommodates the W-phase crossover 8d. Each of the connecting wires 8 a to 8 d is accommodated while being wound in the corresponding accommodating portions 7 a to 7 d so as to be laminated in the radial direction of the stator 2. Each of the connecting wires 8a to 8d includes a bundled portion 9a serving as a middle point, a bundled portion 9b provided with a U-phase terminal, a bundled portion 9c provided with a V-phase terminal, and a W-phase terminal. It is bundled as a bundled portion 9d provided.

  The connecting wires 8a to 8d are divided into two in the circumferential direction at a position X facing the bundling portion 9a that is the middle point, and are wound around the outer circumference of the stator 1 toward the corresponding circumferential side. And each crossover 8a-8d is bundled in a predetermined location, and the bundling parts 9a-9d are formed.

  According to the stator 1 of the present embodiment, the stator wire 1 is divided into two at the position X facing the bundling portion 9a as the midpoint, and the outer periphery of the stator 1 is divided and wound, so that the connecting wire 8 is bundled. The diameter of the stator 1 can be reduced as compared with the case where the outer periphery of the stator 1 is turned around from the portion adjacent to 9 and bundled by the bundling portion 9. Moreover, since the number of the coils 3 is an even number, the crossover wires 8 drawn from the coils 3 can be divided into two so as to be the same number at a position facing the bundling portion 9a as the middle point.

  Moreover, in this embodiment, the connecting wire 8 wound around the outer periphery of the stator 1 includes the connecting wire 8a for the middle point for bundling and connecting the middle points. It is divided into two parts at a position X facing the bundling portion 9a, and is wound around the outer periphery of the stator 1 toward the corresponding circumferential side.

  Moreover, in the stator 1 of the rotating electrical machine including the coil 3 in which three phase currents of the U phase, the V phase, and the W phase flow as in the present embodiment, the bundle portions 9b to 9d provided with the power supply terminals 10 are used. The connecting wires 8 b to 8 d to be bundled are wound around the accommodating portions 7 b to 7 d positioned on the outer periphery of the stator 1 for each phase current by the amount obtained by dividing the number of the coils 3 by 3 that is the number of phase currents. However, when the midpoint is provided on the outer periphery of the stator 1, the midpoint is drawn from all the coils 3 and is wound around the outer periphery of the stator 1. The number of crossovers 8 to be turned is the largest.

  Therefore, the crossover line is divided into two in the circumferential direction at the position X facing the bundling portion 9a of the middle point crossover wire 8a with the largest number of windings, and the direction of the arrow in FIG. By separating the crossover line 8 from the position X that is offset from the position X facing the bundling portion 9a as the middle point (for example, the Y position indicated by the two-dot chain line in FIG. 1), the distance is divided into two in the circumferential direction. Compared with the case where the connecting wire 8 is wound, the accommodating portion 7 can be made smaller, and the diameter of the stator 1 can be reduced even if the accommodating portions 7 of all the cores 2 are formed identically.

  Further, four accommodating portions 7a to 7d are provided on the outer periphery of the stator 1 so as to be spaced apart for each phase current, and the accommodating portions 7a to 7d are proportional to the number of the accommodated connecting wires 8a to 8d. It is formed to a depth. Thereby, it becomes necessary and sufficient accommodating part 7a-7d in order to accommodate the connecting wires 8a-8d. For this reason, the diameter of the stator 1 can be made the minimum necessary.

  In addition, although the stator 1 of this embodiment was demonstrated as what is used for the rotary electric machine of a three-phase alternating current, the stator of this invention is not restricted to this.

  Further, when the midpoint is provided on the inner peripheral side of the stator, the connecting wire may be divided into two in the circumferential direction of the stator from the position facing the bundled portion of any of the U phase, V phase, and W phase. . In this case, for example, the connecting wire may be divided into two in the circumferential direction of the stator from the position facing the V phase located at the center of the three bundle portions.

DESCRIPTION OF SYMBOLS 1 ... Stator, 2 ... Core, 3 ... Coil, 4 ... Stator holder, 5 ... Core main body, 6 ... Insulating member, 6a ... Winding part, 6b ... Fitting part, 7 ... Housing part, 7a ... Middle point accommodation Part, 7b ... U-phase accommodation part, 7c ... V-phase accommodation part, 7d ... W-phase accommodation part, 8 ... crossover, 8a ... midpoint crossover, 8b ... U-phase crossover, 8c ... V Phase crossover wire, 8d ... W phase crossover wire, 9 ... bundling portion, 9a ... mid point bundling portion, 9b ... U phase bundling portion, 9c ... V phase bundling portion, 9d ... W phase bundling portion, 10: Power supply terminal.

Claims (3)

A stator of a rotating electric machine configured by arranging an even number of coils formed by winding a conducting wire around a core in an annular shape,
The stator is provided with a bundle portion formed by bundling the crossover wire at a predetermined location on the outer periphery of the stator, with the conductor wire drawn from each coil as a crossover wire along the outer periphery of the stator.
The core is provided with an accommodating portion for accommodating a crossover wire in the same shape,
The connecting wire is divided into two in the circumferential direction at a position facing the bundle portion on the outer periphery of the stator, and the outer periphery of the stator is wound toward the corresponding circumferential side. Electric stator. A stator for a rotating electrical machine according to claim 1,
The crossover line includes a midpoint crossover line for bundling and connecting midpoints,
The connecting wire is divided into two parts at a position facing the bundling portion of the midpoint connecting wire, and the outer periphery of the stator is wound toward the corresponding circumferential side, respectively. Stator. A stator for a rotating electrical machine according to claim 1 or 2,
A plurality of the accommodating portions are provided so as to accommodate the crossover wires separately for each phase current,
The accommodating portion is formed to have a depth proportional to the number of connecting wires to be accommodated, and the connecting wires corresponding to the accommodating portions are wound around the accommodating portions so as to be stacked in the radial direction of the stator. A stator of a rotating electrical machine characterized by being rotated.

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