JP2016096607A - Stator of motor, three-phase brushless motor, rotor of motor, and three-phase motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator and a rotor of a three-phase brushless motor having high assemblability and quality.SOLUTION: A stator 40 of a three-phase brushless motor includes segments 10 in which a plurality of bobbins 11 are connected by crosslinking parts 15. Same phase coils are wound around the bobbins 11 connected by the crosslinked parts 15, and a terminal 16 is erected in the bobbin 11 located at both ends of the segment 10. Moreover, a winding start wire and a winding-end wire of a coil are connected to the terminal 16, respectively. The number of segments 10 is in multiples of 3. A stator and a rotor of a three-phase brushless motor having assemblability and quality can be provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a motor stator, a three-phase brushless motor, a motor rotor, and a three-phase motor.

  Conventionally, as a stator of a rotating electrical machine, ones such as Patent Document 1 and Patent Document 2 have been proposed. Patent Document 1 discloses a structure in which a coil is continuously wound around a plurality of coil bobbins connected by an insulating film. Patent Document 2 discloses a structure in which a coil is continuously wound around a plurality of divided cores each having a yoke portion connected by a connecting member.

JP 2007-14088 A JP 2002-112483 A

  However, Patent Document 1 is excellent as a stator structure for a single-phase brushless motor having a small number of slots (4 slots or 6 slots). However, when applied to a three-phase brushless motor having a large number of slots, It is necessary to process end lines (winding start line and winding end line) for each slot. Moreover, in the stator of patent document 2, when connecting a coil end line, it is necessary to cut | disconnect the coil wire wound continuously for every slot, and to process an end line.

  The present invention has been made in view of such problems, and an object thereof is to provide a motor stator, a three-phase brushless motor, a motor rotor, and a three-phase motor with high assemblability and quality.

In order to solve the above problems, (1) the present invention includes a segment in which a plurality of bobbins are connected by a bridging portion, and a coil having the same phase is wound around the bobbin of the segment, and the segment is a stator core A stator for a motor is provided.
(2) The motor stator according to (1), wherein terminals are provided upright on the bobbins located at both ends of the segment.
(3) The motor stator according to (2), wherein a winding start line and a winding end line of the coil are connected to the terminal.
(4) The motor stator according to any one of (1) to (3), wherein the number of the segments is a multiple of three.
(5) Provided is a three-phase brushless motor comprising the motor stator according to any one of (1) to (4) above.

(6) The present invention includes a segment in which a plurality of bobbins are connected at a bridging portion, a coil having the same phase is wound around the bobbin of the segment, and the segment is mounted on a rotor core. A motor rotor is provided.
(7) The rotor of the three-phase motor according to (6), wherein terminals are provided upright on the bobbins located at both ends of the segment.
(8) The motor rotor according to (7), wherein a winding start line and a winding end line of the coil are connected to the terminal.
(9) The motor rotor according to any one of (6) to (8), wherein the number of the segments is a multiple of three.
(10) Provided is a three-phase motor comprising the rotor of the motor according to any one of (6) to (9).

  According to the present invention, it is possible to provide a motor stator, a three-phase brushless motor, a motor rotor and a three-phase motor with high assemblability and quality.

It is a top view of the segment of the stator for three-phase brushless motors in an embodiment of the present invention. FIG. 2 is a side view of FIG. FIG. 3 is a diagram showing a form when winding is performed on the segment of FIG. 1. It is the figure which assembled | attached the stator core, after winding to the segment in the stator for three-phase brushless motors of this invention. FIG. 5 is a perspective view of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

  This embodiment demonstrates as a stator for outer rotor type three-phase brushless motors. FIG. 1 is a top view of a stator segment for a three-phase brushless motor according to an embodiment of the present invention. FIG. 2 is a side view of FIG. In the three-phase brushless motor according to the embodiment of the present invention, the stator coil bobbin has a structure in which continuous slots are integrated in units (segment units) having the same phase.

  The bobbin 11 includes an inner wall 12 positioned on the inner circumferential direction side of the stator, an outer wall 13 positioned on the outer circumferential direction side of the stator, and a body portion 14 extending between the inner wall 12 and the outer wall 13. Configure. As shown in FIG. 2, a bobbin hole 18 that connects the inner wall 12, the trunk portion 14, and the outer wall 13 is formed in the trunk portion 14. Adjacent bobbins 11 are connected by a bridging portion 15 extending from the side surface of the inner wall 12. In this embodiment, three (plural) bobbins 11 are connected and connected by two bridging portions 15. This state is referred to as segment 10. In-phase coils are continuously wound around the plurality of bobbins 11 connected by the bridging portion 15. The number of segments 10 in the stator is a multiple of three.

  The bobbin 11 and the bridging portion 15 are integrally formed of a thermoplastic resin (for example, polybutylene terephthalate resin). A metal terminal 16 for connecting an end line of a coil, which will be described later, is erected by press-fitting at the end of the inner wall 12 of the bobbin 11 located at both ends of the segment 10 (upper end in FIG. 2). . The winding start line and the winding end line of the coil are each connected to the terminal 16.

  A boss 17 made of the same material as that of the bobbin 11 is erected on the end portion (upper end portion in FIG. 2) of the inner wall 12 positioned on the bridging portion 15 side of each bobbin 11. In FIG. 1, the bridging portion 15 is substantially V-shaped. The thickness of the bridging portion 15 may be a thickness that flexes flexibly when the bobbin 11 is wound and when the segment 10 is deformed to attach the bobbin 11 to the stator core. A thin-walled portion may be provided so that the property is obtained.

FIG. 3 is a diagram showing a form when winding is performed on the segment of FIG. 1.
Each bobbin 11 of the segment 10 is attached to a winding machine (not shown). At this time, the outer wall 13 of the bobbin 11 adjacent to the bridging portion 15 between the bobbins 11 is positioned so as not to interfere with the coil winding range A. In FIG. 3, CW → CCW → CW winding is performed in order from the left coil 21. The coil end of the segment 10 is tied to the terminal 16.

  FIG. 4 is a view in which a stator core is assembled after winding the segments in the stator for the three-phase brushless motor of the present invention. FIG. 5 is a perspective view of FIG. In the present embodiment, the description will be made as a stator of an 8-pole 9-slot three-phase brushless motor.

The stator 40 according to the present embodiment includes an annular yoke 31, a plurality of salient poles 32, and segments 10a, 10b, and 10c around which coils (not shown) shown in FIG. 3 are wound. Reference numeral 30 indicates a core.
A coil having the same phase is wound around the bobbin 11 connected by the bridging portion 15. The annular yoke 31 is formed by laminating electromagnetic steel plates, and has a fitting portion (not shown) for fitting with the salient pole 32 on the outer periphery. The plurality of salient poles 32 are formed by laminating electromagnetic steel plates, and include a fitting portion (not shown) for fitting with the yoke 31 and a pole tooth portion facing the rotor magnetic pole (not shown) with a gap. It has a substantially T-shape.

(Attaching segments)
The stator U phase of an 8-pole 9-slot three-phase brushless motor is formed by three consecutive slots of CW, CCW, and CW as shown in FIG. The U-phase segment 10 a is arranged on the outer periphery of the yoke 31, the salient poles 32 are inserted from the outside of the bobbin holes 18 of the slots, and the salient poles 32 and the yoke 31 are fitted to each other. It is sandwiched between the salient pole 32 and the yoke 31.
At this time, since the bridging portion 15 of the segment 10 has flexibility, the bobbin 11 can be arranged following the salient pole 32 of each slot. Similarly, the V phase and the W phase are assembled. Reference numeral 10b denotes a V-phase segment, and 10c denotes a W-phase segment.

A total of six terminals 16 are erected in each of the U-phase V-phase W-phase segments 10a to 10c, and one terminal 16 of each segment 10a to 10c is connected as a neutral point. These terminals 16 are used as input terminals for each phase, thereby forming a stator for a three-phase brushless motor.
Table 1 shows the number of stator slots and the number of magnetic poles of the rotor magnet of a three-phase brushless motor to which the present invention can be applied. Uppercase letters (U, V, W) represent CW windings, and lowercase letters (u, v, w) represent CCW windings. Symbols U and u represent the U phase, symbols V and v represent the V phase, and symbols W and w represent the W phase.
Table 2 is a table showing Table 1 in segment units.

  According to the embodiment of the present invention, in the case of the 8-pole 9-slot stator 40, the U phase is continuous with [UuU] (CW-CCW-CW) and the V phase is [VvV] (CW-CCW-CW). The W phase is continuous with [WwW] (CW-CCW-CW). A CW-CCW-CW winding is performed on a segment 10 composed of three bobbins 11, and three segments 10 are combined to form a stator 40 having six terminals. Since the stator of Patent Document 2 has an end line on each bobbin, the number of end lines of the 9-slot stator is 18.

In the case of 16 poles and 18 slots shown in Table 2, the number of terminals is 12 in the present invention, but the stator of Patent Document 2 has the number of end lines of 36. Thus, according to the present invention, it is possible to form a stator with a small number of terminals, and it is possible to provide a motor stator with high assemblability and quality.
Although the embodiment of the present invention is described as a stator of a three-phase brushless motor, the present invention can be applied to a rotor of a three-phase motor.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

10 segment 11 bobbin 15 bridging portion 16 terminal 21 coil 40 stator

Claims (10)

A plurality of bobbins are provided with segments connected by bridging portions,
A stator for a motor, wherein a coil of the same phase is wound around the bobbin of the segment, and the segment is mounted on a stator core.   The motor stator according to claim 1, wherein a terminal is erected on the bobbin located at both ends of the segment.   The stator of the motor according to claim 2, wherein a winding start line and a winding end line of the coil are connected to the terminal.   The motor stator according to any one of claims 1 to 3, wherein the number of the segments is a multiple of three.   A three-phase brushless motor comprising the stator of the motor according to any one of claims 1 to 4. A plurality of bobbins are provided with segments connected by bridging portions,
A rotor of a motor, wherein an in-phase coil is wound around the bobbin of the segment, and the segment is mounted on a rotor core.   The motor rotor according to claim 6, wherein a terminal is erected on the bobbin located at both ends of the segment.   The rotor of the motor according to claim 7, wherein a winding start line and a winding end line of the coil are connected to the terminal.   The motor rotor according to claim 6, wherein the number of segments is a multiple of three.   A three-phase motor comprising the rotor of the motor according to any one of claims 6 to 9.

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