JP2007089400A - Stator of rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a stator structure with winding installation, facilitated of a stator coil additionally improved, even a space factor of the stator coil wound. <P>SOLUTION: In the stator of the rotary electric machine provided with a stator ring 2, a teeth core 4 provided in the stator ring 2, and a stator coil 5 wound around to the teeth core 4, the stator coil 5, as it moves from a tip end of the teeth core 4 toward its base part direction, is formed with a thickness small for each layered coil, and the stator is additionally constituted formed having a large width of this coil, and in addition, the cross sectional area of each layered coil is formed uniformly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stator for a rotating electrical machine, and more particularly to a stator for a rotating electrical machine that has a stator structure that facilitates winding of a stator coil and that also improves the space factor of the stator coil that is wound with the simple structure. Is.

  In recent years, various rotating electrical machines using permanent magnets have been proposed. For example, in a conventional rotating electrical machine stator using a permanent magnet for driving a vehicle wheel, an automatic winding machine is often used to wind a stator coil in a slot provided in the stator. However, when a flat conductor is used for the stator coil, it is extremely difficult to wind the flat conductor in a slot provided in the stator with an automatic winding machine.

  In view of this, various proposals have been made in order to improve the space factor of the stator coil and to improve the winding efficiency of the stator coil when a rectangular conductor is used for the stator coil.

For example, a first belt-like first belt-like portion having a length b, a connecting portion that extends from the one end portion in the longitudinal direction of the first belt-like portion and extends in the width direction of the first belt-like portion, A rectangular conductor having a longitudinal belt having the same width as that of the first belt and having a second belt having a length a and one end of which is continuous with the connecting portion is prepared in advance. There is a stator coil wound around a stator tooth to improve the space factor of the stator coil and the winding efficiency of the stator coil (see Patent Document 1).
Japanese Patent Laid-Open No. 9-205749

  However, the stator of the conventional rotating electric machine is wound around each stator tooth of the stator even if it is a stator coil of a rectangular conductor prepared in advance, which includes the first and second strip portions and the connecting portion described above. Since the wire is used, there is a problem in the winding efficiency of the stator coil even though the space factor of the stator coil is good.

  The present invention has been made in view of the above points, and has not only a space factor of the stator coil but also excellent winding efficiency of the stator coil, and a structure with excellent heat dissipation against heat generated in the stator coil. It aims at providing the stator of a rotary electric machine.

In order to solve the above object, a stator of a rotating electrical machine of the present invention is a stator of a rotating electrical machine including a stator ring, a tee score provided on the stator ring, and a stator coil wound around the tee score.
The stator coil is
From the tip of the tea score toward the base, the thickness of the coil of each laminated layer is reduced and the coil width is increased, and the cross-sectional area of the coil of each laminated layer is constant. It is characterized by being formed.

  The stator ring is provided with a plurality of fitting grooves at equal intervals on the inner peripheral surface thereof, and the teascore has a stator tooth formed on one side thereof, and a fitting groove provided on the inner peripheral surface of the stator ring on the other side. And a stator core is formed by fitting a fitting portion of a tee score into a fitting groove of a stator ring.

  As described above, according to the present invention, it is possible to easily wind a rectangular conductor wire with a good space factor in a stator with a simple structure, and the stator also has a structure in which a teascore is fitted and fixed to the stator ring. Therefore, the stator coils can be individually wound and formed, and these assemblies can be assembled in a short time.

  FIG. 1 is an explanatory view of the main structure of an embodiment of a stator of the present invention used in a rotating electrical machine, and FIG. 2 is a partial exploded view of FIG.

  1 and 2, the stator 1 includes a plurality of laminated tee scores 4 forming a laminated stator ring 2 and stator teeth 3, and a plurality of rectangular conductor wires wound around the tee scores 4. And a stator coil 5.

  The stator ring 2 is provided with a number of wedge grooves 6 corresponding to the tea score 4 at equal intervals. A wedge 7 that fits into the wedge groove 6 is formed at one end of the tee score 4, and the stator teeth 3 are formed at the other end of the tee score 4.

  A stator coil 5 called a trapezoidal aligned vertically wound coil individually wound and formed as shown in FIG. 3 is inserted into the tee score 4, and a wedge 7 of the tee score 4 is press-fitted into a wedge groove 6 of the stator ring 2. Thus, the tea score 4 wound with the stator coil 5 is attached to the stator ring 2. Then, the stator 1 is completed by connecting the terminals of each stator coil 5 according to a predetermined connection method.

  FIG. 3 is a front view of an example winding of a stator coil, FIG. 4 is a plan view of FIG. 3, and FIG. 5 is a right side view of FIG.

  3 to 5, when the stator coil 5, which is called the trapezoidal alignment vertical winding coil, is mounted on the tee score 4, the lamination of each layer is directed from the tip of the tee score 4 toward the base, that is, the wedge 7. Each of the formed coils is formed with a small thickness and a wide coil width, and the cross-sectional areas of the laminated coils are formed in a constant shape.

Now, the number of stacked bar members (flat conductors) of the stator coil 5 is, for example, 4 layers, and the coil widths of the respective layers stacked in order from the tip of the tea score 4 to the base portion thereof are defined as W ₀ , W ₁ , W ₂ , When W ₃ and the coil thicknesses are T ₀ , T ₁ , T ₂ , T ₃ , W ₀ <W ₁ <W ₂ <W ₃ and T ₀ > T ₁ > T ₂ > T are formed. ₃ and the cross-sectional areas of the stator coils 5 of each layer are equal, W ₀ × T ₀ = W ₁ × T ₁ = W ₂ × T ₂ = W ₃ × T _3, and the stator coils 5 of each layer It is a stator winding that keeps the current density constant.

  That is, when the stator coil 5 is attached to the stator ring 2 via the tee score 4, the trapezoidal stator coil 5 stacked in the base direction from the tip of the tee score 4 has a space factor due to its trapezoidal shape. The efficiency of the stator coil 5 and the stator ring 2 is increased and the contact area between the stator coil 5 and the stator ring 2 is increased. As a result, the heat conduction to the stator ring 2 is improved. It becomes.

  FIG. 6 is an explanatory diagram of the shape of a wire before forming a stator coil used in the present invention, and FIGS. 7 to 9 are explanatory diagrams of a wire forming explaining a method of forming a stator coil used in the present invention. .

As shown in FIGS. 6 (A) and 6 (B), a bar material 10 of a uniform rectangular conductor having a thickness T ₀ and a width W ₀ of a pre-calculated dimensional length wound around a tee score 4 is prepared. Then, the length L ₁ added to the stacking thickness of the tea score 4 is compressed by the wire forming die 21 from the thickness T ₀ to T ₁ . Since this length portion L ₁ is compressed by the wire forming die 21, the width W ₀ extends to W ₁ .

By performing the same processing at a predetermined distance of a length S obtained by adding Y to the width of the tee score 4, a thickness T ₁ and a width W ₁ are shown in FIGS. 7A and 7B. The bar material 11 becomes.

Next, with respect to the bar material 11 processed as described above, similarly to the case of FIG. 7A, the thickness T is further reduced at two positions corresponding to the length L ₁ compressed to the thickness T _1. compress on a wire mold 21 from ₁ to _{T 2.} Since this portion of the length component L ₁ is compressed wire mold 21, the width W ₁ spreads W _2. By this step, as shown in FIGS. 8A and 8B, the bar material 12 having a thickness T ₂ and a width W ₂ is obtained.

In the same manner, the bar material 13 having the thickness T ₃ and the width W ₃ of the wire of the stator coil 5 is produced as shown in FIGS. 9A and 9B by repeating this process.

  Individual bars called trapezoidal aligned longitudinal coils shown in FIGS. 3 to 5 are formed by winding the bar material 13 using a trapezoidal winding frame whose bottom surface has a substantially cross-sectional shape having a tea score 4. A coil 5 is created.

FIG. 2 is an explanatory view of the main structure of an embodiment of a stator of the present invention used in a rotating electric machine. FIG. 2 is an exploded structural view of a part of FIG. 1. It is a winding front view of one Example of a stator coil. FIG. 4 is a plan view of FIG. 3. FIG. 4 is a right side view of FIG. 3. It is wire shape explanatory drawing before the shaping | molding of the stator coil used for this invention. It is wire material formation explanatory drawing explaining the wire material formation method of the stator coil used for this invention. It is wire material formation explanatory drawing explaining the wire material formation method of the stator coil used for this invention. It is wire material formation explanatory drawing explaining the wire material formation method of the stator coil used for this invention.

Explanation of symbols

1 Stator 2 Stator Ring 3 Stator Teeth 4 Tea Score 5 Stator Coil 6 Wedge Groove 7 Wedge 10, 11, 12, 13 Bar Material 21 Wire Material Mold

Claims (2)

In a stator of a rotating electrical machine including a stator ring, a tee score provided on the stator ring, and a stator coil wound around the tee score,
The stator coil is
As it goes from the tip of the tea score toward its base, the thickness of each laminated coil is formed thin and the coil width is formed wide,
And the stator of the rotary electric machine characterized by forming the cross-sectional area of the coil of each laminated | stacked layer uniformly. The stator ring is provided with a plurality of fitting grooves at equal intervals on the inner peripheral surface thereof, and the teascore has a stator tooth formed on one side thereof and a fitting provided on the inner peripheral surface of the stator ring on the other side. The stator for a rotating electrical machine according to claim 1, wherein a fitting portion to be engaged with the groove is formed, and the fitting portion of the tee score is fitted into the fitting groove of the stator ring.

Images