JP4480428B2 - Magnet generator stator - Google Patents

Description

  The present invention relates to a stator having a laminated core around which a copper wire is wound in a magnet generator.

  In a magnet generator for motorcycles (motorcycles) and the like (see, for example, Patent Document 1), there is a request for an increase in output current in a low rotation range and a request for suppression of output current in a high rotation range. In order to satisfy the requirements simultaneously, it is necessary to increase the thickness of the laminated core of the stator. Moreover, in order to suppress the temperature rise of the power generation coil accompanying the increase in output current, it is necessary to thicken the copper wire of the power generation coil.

However, when a thick copper wire is wound around a tooth portion of a laminated core that is formed by laminating core plates of the same shape punched by a conventional press, the copper wire is large at the center portion in the rotor axial direction of the laminated core. There arises a problem that the winding work becomes difficult due to the swelling and the gap between the adjacent power generating coils being reduced. Moreover, the gap between the copper wire and the laminated core due to the reduction of the gap between the adjacent power generation coils and the bulge of the copper wire deteriorates the heat dissipation of the power generation coil, causing a problem that the power generation coil exceeds the heat resistance limit.

Therefore, in the previous application (Japanese Patent Application No. 2002-294985), the present applicant, as shown in FIG. 3, has a width in the rotor rotational direction a from the central portion (central plate) 71 in the rotor axial direction b toward both ends. Has proposed a stator in which the laminated core 6 is configured to have a narrow portion (narrow portion plate) 72 that gradually narrows.

However, when the copper wire 11 is wound around the laminated core 6 having the narrow portion plate 72, the bulge B of the copper wire 11 from the narrow portion plate 72 toward the winding direction c of the copper wire 11, as shown in FIG. Thus, the winding state of the copper wire 11 does not become a winding state along the outer peripheral shape of the laminated core 6, but turns into a winding state in which the upper left portion and the lower right portion in the figure swell in the left-right direction. It has been found that the gap between 12 (see FIG. 1) becomes small and winding becomes difficult. In addition, the code | symbol 10 in FIG. 3 represents the insulating resin.

  An object of the present invention is to solve the above-mentioned problems of the previous application, and to provide a stator for a magnet generator in which a gap between adjacent power generating coils can be increased and winding is facilitated. To do.

Stator magnet generator according to the present invention, in the stator of the magneto generator comprising a laminated core copper wire is wound around the tooth portion, the tooth portions are at both ends from the center plate of the core stacking direction of the laminated core headed, the core has a laminated direction and the rotor rotational direction width stepwise narrowed narrow plate of perpendicular, widthwise center of the width narrow plate, compared widthwise center of said central plate It is eccentric Te, widthwise center of the narrow plate is characterized by being distribution to the winding start side of the copper wire.

Because according to the present invention, the widthwise center of the narrow plate, causes eccentric with respect to the width direction center of the central plate, the widthwise center of the narrow plate, and distribution to the winding start side of the copper wire, The winding state of the copper wire was such that it was in close contact with the laminated core, and the gap between adjacent power generation coils was sufficiently large, making winding easier.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a basic configuration diagram of a magnet generator incorporating a stator according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II in FIG.

  1 and 2, 1 denotes a rotor and 2 denotes a stator.

  The rotor 1 can be rotated by a drive source (not shown), and a plurality of magnets 3 (specific illustration is omitted in FIG. 1) arranged in a ring with a predetermined interval, and a ring shape. The yoke 4 and the protective ring 5 are provided.

The stator 2 is fixedly disposed in the hollow portion of the rotor 1. The stator 2 includes a laminated core 6. The laminated core 6 is formed by laminating a plurality of core plates 7 obtained by pressing an iron plate, stacking end plates 8 slightly thicker than the core plate 7 on both sides, and then caulking them with a rivet (not shown) to integrate them. The surface of each projecting portion (tooth portion) 9 arranged in a ring shape with a predetermined interval is insulated by an epoxy resin (insulating resin) 10. A copper wire 11 is wound around each protrusion 9 of the laminated core 6 to form a power generation coil 12.

As shown in FIG. 2, the plurality of core plates 7 constituting the laminated core 6 are composed of two types of core plate groups 71 and 72 having different widths in the rotor rotation direction a, and are perpendicular to the rotor rotation direction a. A wide core plate group ( center plate ) 71 is located at the center in the rotor axial direction (core stacking direction) b, and a narrow core plate group (narrow plate ) 72 is located on both sides of the center plate 71. Is located. The narrow portion plate 72 is offset from the central portion in the rotor rotation direction a to a position opposite to the winding direction c of the copper wire 11. That is, the center in the width direction of the narrow portion plate 72 is eccentric with respect to the center in the width direction of the center portion plate 71, and the center in the width direction of the narrow portion plate 72 is arranged on the winding start side of the copper wire 11. ing. The width of the end plate 8 in the rotor rotation direction a is narrower than the width of the narrow portion plate 72 in the rotor rotation direction a. The end plate 8, as well as the offset of the narrow plate 72 relative to the center plate 71 are offset with respect to the narrow plate 72.

As shown in FIG. 2, the winding state of the copper wire 11 with respect to the protruding portion 9 of the laminated core 6 is substantially the laminated core 6 in which the narrow portion plate 72 is not offset (corresponding to the laminated core 6 in FIG. 3). It will be in the winding state along the outer periphery shape. This is because when the copper wire 11 is wound, a bulge B of the copper wire 11 is generated from the narrow portion plate 72 to the winding direction side of the copper wire 11 (upper left and lower right in FIG. 3). This is because the winding state of the copper wire 11 becomes a winding state in close contact with the laminated core 6 because the part plate 72 is offset.

As described above, according to the stator 2 according to the present embodiment, the narrow portion plate 72 is offset from the central portion in the rotor rotation direction a to a position opposite to the winding direction c of the copper wire 11. The winding state is a winding state in close contact with the laminated core 6, and the gap between the adjacent power generation coils 12, 12 is sufficiently large, which facilitates winding.

In the above embodiment, the single-stage narrow portion plate 72 has been described. However, the present invention can also be applied to a plurality of narrow-width portion plates 72. Further, the end plate 8 may not be offset with respect to the narrow portion plate 72.

It is a basic lineblock diagram of the magnet type generator with which the stator concerning one embodiment of the present invention was built. It is II-II sectional drawing shown in FIG. It is sectional drawing of the stator used as the premise of this invention, and is sectional drawing by the cut surface similar to FIG.

Explanation of symbols

2 Stator 6 Laminated core
9 Protrusion (tooth part)
11 Copper wire
71 Center plate 72 Narrow plate a Rotor rotation direction b Rotor axial direction (core stacking direction)
c Copper wire winding direction

Claims (1)

In the stator of a magnet generator having a laminated core in which a copper wire is wound around the teeth part ,
The teeth part has a narrow part plate in which the width in the rotor rotation direction perpendicular to the core lamination direction gradually decreases from the central part plate in the core lamination direction of the laminated core toward both ends. the widthwise center of the narrow plate, the being eccentric with respect to the width direction center of the central plate, the width direction center of the narrow plate is to be distribution to the winding start side of the copper wire The stator of the magnetic generator characterized by the above.

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