JP2004173475A - Stator for motor, and method for manufacturing stator for motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for a motor, in which a winding can be easily wound around a salient pole of a laminated stator core and the increase of manufacturing costs and the drop of productivity can be prevented. <P>SOLUTION: One stator core piece has a protrusion. The other stator core piece has a long hole, to which the protrusion is loosely fitted. Turn movements of the stator core pieces each other are guided by the protrusion and the long hole, and at the same time, the turn angle is regulated. Each laminated stator core piece is turned in a specific direction. It is deformed from a state where salient pole parts of the respective stator core pieces are arranged side by side along the center axis to a state where the salient pole parts of the respective stator core pieces are inclined to the center axis. The manufacturing method includes a process of laminating a prescribed number of the stator core pieces in a state where the salient pole parts are arranged side by side along the center axis, a process of winding around the winding to be wound around, in a prescribed state when the salient pole is inclined to the salient pole at the salient pole part into a prescribed shape; and a skew process in which each stator core piece is formed by relatively rotating it to the adjacent stator core piece, only at a prescribed angle in a specific direction. It also includes a joining process to integrate each stator core piece by mutually jointing it. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stator for a motor and a method of manufacturing the stator for a motor, and more specifically, winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated. And a method for manufacturing the motor stator.
[0002]
[Prior art]
Conventionally, a motor stator, which is a component of various motors, is configured by winding a winding on each salient pole of a laminated stator core formed by laminating a predetermined number of stator core pieces. I have.
[0003]
Further, in a motor that requires high operating accuracy, a laminated stator core is used in which a predetermined number of stator core pieces are skewed and laminated for the purpose of reducing rotational unevenness (torque ripple) of the rotor. By winding a winding around each salient pole that is inclined with respect to the center axis of the laminated stator core, a motor stator having desired performance is configured (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-8-223829 [Problems to be Solved by the Invention]
By the way, in the laminated stator core in which a predetermined number of stator core pieces are skewed and laminated, as described above, each salient pole is inclined with respect to the center axis of the laminated stator core, and Since the slot opening grooves between them are also inclined with respect to the central axis of the laminated stator core like the salient poles, it is extremely difficult to wind the winding around each salient pole.
[0005]
In other words, when winding a salient pole using a special machine, the winding mechanism requires complicated behavior, which increases the cost of the special machine, and in turn manufactures a motor stator. However, there is an inconvenience that causes an increase in cost related to the above.
[0006]
In addition, if the skew angle of each stator core piece is large and each salient pole is greatly inclined, it is difficult to use a special machine, so it is necessary to manually wind the winding around the salient pole. In other words, there is a disadvantage that the lead time for manufacturing the stator for the motor is increased, and the productivity is reduced.
[0007]
In view of the above circumstances, an object of the present invention is to make it possible to easily wind a winding around a salient pole of a laminated stator core, thereby preventing an increase in manufacturing cost and a decrease in productivity. To provide a motor stator and a method for manufacturing the motor stator.
[0008]
[Means for Solving the Problems]
The stator for a motor according to the present invention is a stator for a motor in which a winding is wound around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated. The stator core has a protrusion on one of the adjacent stator core pieces that are stacked and adjacent, and has a long hole into which the protrusion fits loosely on the other adjacent stator core piece, and the protrusion and the long hole By guiding the rotation operation of the stator core pieces with each other, the rotation angle is regulated, and the laminated stator core pieces are rotated in a certain direction, so that the salient pole portion of each stator core piece is aligned with the center axis. It is characterized in that it is configured so that the salient pole portions of the respective stator core pieces can be deformed from the juxtaposed state along the axis along the central axis.
[0009]
Further, the method for manufacturing a motor stator according to the present invention is a method of manufacturing a motor stator comprising winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated. A manufacturing method, comprising: a laminating step of laminating a predetermined number of the stator core pieces in such a manner that salient pole portions of the stator core pieces are juxtaposed along a central axis, and lamination of the salient pole pieces. A winding step of loosely winding the winding in a manner that the salient pole is wound into a predetermined state when the salient pole is tilted into a predetermined shape, and each stator core piece to an adjacent stator core piece. A skew step of forming a skewed laminated stator core having a predetermined shape by relative rotation in a predetermined direction by a predetermined angle, and a joining step of joining and integrating a predetermined number of the stator core pieces into one another And characterized by comprising To have.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a motor stator according to the present invention and a method for manufacturing the motor stator will be described in detail with reference to the drawings illustrating an embodiment.
[0011]
As shown in FIG. 1, a motor stator 1 according to an embodiment of the present invention is configured by winding windings 3 around salient poles 2T, 2T... Of a laminated stator core 2.
[0012]
The laminated stator core 2 is constituted by laminating and integrating a predetermined number of stator core pieces 10, 10,..., And has a ring-shaped yoke 2Y and a predetermined number protruding radially inward from the yoke portion 2Y. , 2T, 2T,...
[0013]
As shown in FIGS. 1 to 3, the laminated stator core 2 alternately laminates two types of stator core pieces 10, that is, a stator core piece 10 (A) and a stator core piece (B). It is constituted by that.
[0014]
As shown in FIG. 4, the stator core piece 10 (A) has an annular yoke portion 10y constituting the yoke 2Y of the above-described laminated stator core 2, and projects radially inward from the yoke portion 10y. The laminated stator core 2 has a predetermined number of salient pole portions 10t, 10t,.
[0015]
Also, in the yoke portion 10y of the stator core piece 10 (A), four long holes 10h, 10h... Extending in the circumferential direction and four projections 10p, 10p. The elongated holes 10h and the projections 10p are alternately formed with a central angle of 90 ° along the circumferential direction of the yoke portion 10y.
[0016]
Incidentally, the projection 10p is formed to project from the bottom surface of the yoke portion 10y by punching from the front surface (upper surface) side, and a concave portion 10r is formed on the surface of the yoke portion 10y due to the punching.
[0017]
On the other hand, as shown in FIG. 5, the stator core piece 10 (B), like the above-described stator core piece 10 (A), has an annular yoke portion 10y and protrudes radially inward from the yoke portion 10y. .. Has a predetermined number of salient pole portions 10t, 10t,.
[0018]
The yoke portion 10y of the stator core piece 10 (B) has four long holes 10h, 10h... Extending in the circumferential direction, and four projections 10p, 10p. The yoke portions 10y are alternately formed with a central angle of 90 ° along the circumferential direction. The surface of the yoke portion 10y has a recess 10r formed by punching for forming the projection 10p.
[0019]
Here, the above-described stator core pieces 10 (A) and 10 (B) have exactly the same shape, but in a manufacturing process described later in detail, they are relative to each other by 45 °. It is stamped and formed from a strip in a rotated positional relationship.
[0020]
In the laminated stator core 2 in which the stator core pieces 10 (A) and the stator core pieces 10 (B) are alternately laminated, as shown in FIGS. 6 and 7, the stator core pieces 10 ( A) of each of the projections 10p, 10p... Loosely fit into the respective elongated holes 10h, 10h... Of the stator core piece 10 (B), and the respective projections 10p, 10p. .. Are loosely fitted into the respective elongated holes 10h, 10h,.
[0021]
Accordingly, the stator core pieces 10 (A) and the stator core pieces 10 (B) are moved along the direction in which the protrusions 10p move within the elongated holes 10h, so that the laminated stator core pieces are formed. It is possible to relatively rotate around the second axis.
[0022]
Further, as shown in FIG. 8A, the protrusion 10p of the stator core piece 10 (A) comes into contact with one end of the elongated hole 10h of the stator core piece 10 (B). 10p moves and comes into contact with the other end of the elongated hole 10h as shown in FIG. 8 (b), so that the relative position between the stator core piece 10 (A) and the stator core piece 10 (B) is increased. The rotation angle is regulated.
[0023]
Incidentally, even in the situation where the protrusion 10p of the stator core piece 10 (B) is loosely fitted in the elongated hole 10h of the stator core piece 10 (A), the stator is operated based on the same operation mode as described above. It goes without saying that the relative rotation angle between the core piece 10 (A) and the stator core piece 10 (B) is restricted.
[0024]
As described above, in the laminated stator core 2 in which the stator core pieces 10 (A) and the stator core pieces 10 (B) are alternately laminated, as shown in FIGS. In a state in which the salient pole portions 10t are juxtaposed along the central axis of the laminated stator core 2, in other words, the salient pole 2T formed by laminating the salient pole portions 10t is straight along the central axis. be able to.
[0025]
Further, in the above-described laminated stator core 2, each stator core piece 10 is rotated (skewed) by a predetermined angle in a certain direction, so that the salient pole portion 10t is laminated as shown in FIGS. Can be deformed into a predetermined shape inclined at a predetermined angle with respect to the center axis of the laminated stator core 2.
[0026]
Here, the laminated stator core 2 constituting the motor stator 1 as a product has the stator core pieces 10, 10,... Skewed (see FIGS. 3 and 7). 10 are integrated by welding (bonding) to each other.
[0027]
The winding 3 is wound around each salient pole 2T of the laminated stator core 2 constituting the motor stator 1 as a product, and the winding 3 is inclined in a predetermined shape as described above. It is needless to say that the salient pole 2T is wound in a predetermined manner without breaking or loosening.
[0028]
Hereinafter, an embodiment of a method of manufacturing the motor core 1 having the above-described configuration will be described in accordance with a work procedure.
First, in a progressive die apparatus (not shown), a stator core piece 10 (A) and a stator core piece 10 (B) described in detail above are punched alternately from a strip steel plate (not shown). I do.
[0029]
Here, the stator core pieces 10 (A) and the stator core pieces 10 (B) are alternately laminated in a progressive die apparatus, and a predetermined number of the laminated stator cores 2 constitute the laminated stator core 2. (Lamination step).
[0030]
In the above-described laminated stator core 2, the projections 10p, 10p,... Of the stator core piece 10 (A) are loosely fitted into the respective slots 10h, 10h,. .. Of the stator core piece 10 (B) are loosely fitted in the respective elongated holes 10h, 10h... Of the stator core piece 10 (A).
[0031]
Further, in the progressive die apparatus, the salient pole portions 10t of the respective stator core pieces 10 are juxtaposed along the central axis of the laminated stator core 2, that is, the salient pole portions formed by laminating the salient pole portions 10t. 2T is configured as a straight shape along the central axis.
[0032]
The laminated stator core 2 manufactured in the progressive die apparatus is taken out, and then the laminated stator core 2 is set on a winding work machine (not shown). On the other hand, the winding 3 is wound (winding step).
[0033]
At this time, as described above, since each salient pole 2T in the laminated stator core 2 has a straight shape along the central axis, the winding operation of the winding 3 around the salient pole 2T is extremely easy. It becomes.
[0034]
Thereby, when winding the winding 3 around the salient pole 2T by hand, the workability is extremely good, so that the lead time related to the manufacture of the motor stator is shortened, and the productivity is greatly improved. It is possible to do.
[0035]
In addition, when the winding 3 is wound around the salient pole 2T using a special machine, the complicated mechanism is not required for the winding mechanism. The cost related to the manufacture of the child 1 will be greatly reduced.
[0036]
Here, in the above-described winding process, in a skew process described later, when each salient pole 2T in the laminated stator core 2 is inclined to a predetermined shape, the winding 3 does not break or loosen. It is important that the winding 3 is loosely wound around the salient pole 2T as shown in FIG. 9A.
[0037]
After the winding operation (winding step) in the winding operation machine (not shown) is completed, the laminated stator core 2 is taken out from the winding operation machine, and then is stacked on the skew operation machine 100 as shown in FIG. Set the stator core 2.
[0038]
Here, the skew working machine 100 includes a bottomed cylindrical base 101 that supports the yoke 2Y of the laminated stator core 2 from below, and a central opening of the laminated stator core 2 erected at the center of the base 101. , A clamper 103 rotatably supported by the column 102 and holding the yoke 2Y of the laminated stator core 2 from above, and rotating the clamper 103 manually by an operator. And a handle 104.
[0039]
The base 101 has a concave portion 101r which engages with the projection 10p of the lowermost stator core piece 10 constituting the laminated stator core 2. The clamper 103 has a laminated stator core. 2, a convex portion 103p is formed to engage with the concave portion 10r of the uppermost stator core piece 10.
[0040]
After setting the laminated stator core 2 in the skew working machine 100 as described above, the clamper 103 of the skew working machine 100 is rotated in a fixed direction, so that the cooperation between the elongated hole 10h and the protrusion 10p described in detail above. The relative rotation angle between the adjacent stator core pieces 10 is regulated by the action, so that all the stator cores 10, 10... Skew, and a skewed laminated stator core 2 having a predetermined shape is formed (skew step).
[0041]
When the stator cores 10 constituting the laminated stator core 2 are skewed, the salient poles 2T formed by laminating the salient pole portions 10t are at a predetermined angle with respect to the center axis of the laminated stator core 2. It is deformed into a predetermined shape that is only inclined.
[0042]
At this time, as shown in FIG. 9A, the winding 3 that has been loosely wound around the salient pole 2T causes the salient pole 2T in the laminated stator core 2 to be inclined into a predetermined shape in the skew step described above. 9B, the salient pole element 2T is wound in a predetermined manner without disconnection or loosening.
[0043]
After the skew (skew process) in the skew work machine 100 is completed, the laminated stator core 2 is taken out from the skew work machine 100, and then the respective stator core pieces 10 constituting the laminated stator core 2 are welded to the outer periphery thereof by welding. The main parts are joined together to be integrated (joining step).
[0044]
Thus, as shown in FIG. 1, the motor stator 1 as a product constituted by winding the windings 3 around the salient poles 2T, 2T... Of the laminated stator core 2 is completed. .
[0045]
In the above-described embodiment, a total of seven stator core pieces of four stator core pieces 10 (A) and three stator core pieces 10 (B) are alternately laminated. Although the laminated stator core 2 is formed, it goes without saying that the number of stator core pieces constituting the laminated stator core can be arbitrarily set based on the specifications of the motor stator and the like.
[0046]
Further, the shapes, the number of installations, and the locations of the projections 10p and the elongated holes 10h in the stator core pieces 10 (A) and the stator core pieces 10 (B) are not limited to the above-described embodiments. Of course, it can be set appropriately.
[0047]
Further, in the above-described embodiment, the stator core pieces 10 are joined to each other by welding after the skew in the skew working machine 100 is completed. It is needless to say that various joining methods such as joining can be adopted.
[0048]
Furthermore, the relative rotation angle between the stator core pieces 10, that is, the skew angle in the laminated stator core 2, based on the cooperative action between the projection 10p and the elongated hole 10h, can of course be set arbitrarily. In other words, in other words, the present invention can be applied effectively no matter how the salient poles of the laminated stator core constituting the motor stator are inclined.
[0049]
【The invention's effect】
As described above in detail, the motor stator according to the present invention is a motor stator formed by winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated. A laminated stator core, the laminated stator core has a projection on one adjacent stator core piece, and has an elongated hole in which the projection is loosely fitted to the other adjacent stator core piece, The long holes guide the rotation of the stator core pieces and regulate the rotation angle.By rotating each of the stacked stator core pieces in a certain direction, the salient poles of each stator core piece are It is characterized in that the salient pole portions of the respective stator core pieces can be deformed from the juxtaposed state along the central axis to a state inclined with respect to the central axis.
[0050]
According to the above configuration, in a state where the salient pole portions of the stator core pieces in the laminated stator core are juxtaposed along the central axis, a winding is wound around the salient pole formed by laminating the salient pole portions. This makes it possible to easily wind the winding around the salient poles of the laminated stator core.
[0051]
As described above, according to the motor stator according to the present invention, the winding can be easily wound around the salient poles of the laminated stator core, thereby increasing the manufacturing cost and reducing the productivity. Can be prevented.
[0052]
Further, the method for manufacturing a motor stator according to the present invention is a method for manufacturing a motor stator comprising winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated. A manufacturing method, comprising: a laminating step of laminating a predetermined number of stator core pieces so that salient pole portions of the stator core pieces are juxtaposed along a central axis; and a salient pole formed by laminating salient pole portions. A winding step of loosely winding the winding in a mode of being wound in a predetermined state when the salient pole is tilted into a predetermined shape, and each stator core piece with respect to an adjacent stator core piece; A skew step of forming a skewed laminated stator core having a predetermined shape by relative rotation in a predetermined direction by a predetermined angle, and a joining step of joining and integrating a predetermined number of stator core pieces with each other. It is characterized by comprising.
[0053]
According to the above configuration, in the above-described winding step, the winding is formed such that the salient pole formed by laminating the salient pole portions is wound in a predetermined state when the salient pole is inclined into a predetermined shape. In this winding process, the salient poles constituting the salient poles are juxtaposed along the central axis, so that the windings can be easily wound on the salient poles of the laminated stator core. It can be wound around.
[0054]
As described above, according to the method for manufacturing the motor stator according to the present invention, the winding can be easily wound around the salient poles of the laminated stator core, thereby increasing the manufacturing cost and increasing the productivity. It is possible to prevent the deterioration beforehand.
[Brief description of the drawings]
FIGS. 1 (a) and 1 (b) are a plan view and a side view showing an embodiment of a motor stator according to the present invention.
2A and 2B are a plan view and a side view of a laminated stator core in the motor stator shown in FIG. 1;
FIGS. 3A and 3B are a plan view and a side view of a laminated stator core in the motor stator shown in FIG. 1;
FIGS. 4 (a), (b) and (c) are a plan view, a side view and a sectional view of a main part of a stator core piece constituting the laminated stator core shown in FIGS. 2 and 3.
5 (a), (b) and (c) are a plan view, a side view, and a sectional view of a main part of a stator core piece constituting the laminated stator core shown in FIGS. 2 and 3. FIG.
6A is a sectional view taken along the line VIa-VIa in FIG. 2, and FIG. 6B is a sectional view taken along the line VIb-VIb in FIG.
7A is a sectional view taken along line VIIa-VIIa in FIG. 3, and FIG. 7B is a sectional view taken along line VIIb-VIIb in FIG.
FIG. 8 is a plan view of a main part showing a state of relative rotation of the laminated stator core pieces.
FIGS. 9A and 9B are conceptual diagrams showing a cross-sectional shape of a salient pole when a skew step is performed through a winding step.
FIG. 10 is a conceptual cross-sectional view showing a skew work machine for performing a skew step when manufacturing a motor stator according to the present invention.
[Explanation of symbols]
1 ... Motor stator,
2. Laminated stator core
2Y ... yoke,
2T ... salient pole,
3 ... winding,
10, 10 (A), 10 (B) ... stator core pieces,
10y ... yoke part,
10t ... salient pole part,
10p ... projection,
10h ... long hole,
100 ... skew work machine.

Claims (2)

A motor stator formed by winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated,
The laminated stator core has a protrusion on one of the adjacent stator core pieces that are stacked and has a long hole into which the protrusion fits loosely on the other adjacent stator core piece. The holes guide the rotation of the stator core pieces, regulate the rotation angle, and rotate the stacked stator core pieces in a certain direction so that the salient poles of each stator core piece are centered. A stator for a motor, wherein the stator is configured so that the salient pole portions of the stator core pieces can be deformed from a state of juxtaposition along the axis to a state inclined with respect to the center axis. A method for manufacturing a stator for a motor, comprising winding a winding around an inclined salient pole in a laminated stator core in which a predetermined number of stator core pieces are skewed and laminated,
A lamination step of laminating a predetermined number of the stator core pieces in such a manner that salient pole portions of the stator core pieces are juxtaposed along a central axis;
After the laminating step, the winding is gently wound on the salient pole formed by laminating the salient pole portions, in a mode in which the salient pole is wound in a predetermined state when inclined in a predetermined shape. Winding process,
After the winding step, a skew step of rotating each stator core piece relative to an adjacent stator core piece by a predetermined angle in a fixed direction to form a skewed laminated stator core having a predetermined shape. When,
After the skew step, a joining step of joining and integrating a predetermined number of the stator core pieces to each other,
A method for manufacturing a stator for a motor, comprising:

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