JP3580127B2 - Reluctance motor stator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stator for a reluctance motor, and more particularly to a stator in which laminated cores divided in an output axis direction for each electrode unit are connected in a cylindrical shape.
[0002]
[Prior art]
Conventionally, as a stator of a reluctance motor, a coil is wound around each of a plurality of laminated cores divided in an output axis direction for each electrode unit to form a winding portion, and the plurality of laminated cores are connected in a cylindrical shape. Things are known.
[0003]
By dividing the stator for each electrode unit as described above, it is possible to easily perform coil winding work on each laminated iron core, and to improve the manufacturing efficiency of the reluctance motor.
[0004]
[Problems to be solved by the invention]
However, since the above-described stator of the conventional reluctance motor forms an electrode by laminating thin steel plates, the tip of the electrode is caulked or welded in order to prevent the electrode from coming apart. There is a need. For this reason, there is a problem that the electromagnetic performance at the caulking position or the welding position is affected, and the performance of the reluctance motor is reduced.
[0005]
The present invention has been proposed in view of the above circumstances, and provides a stator for a reluctance motor having excellent electromagnetic performance by forming an electrode made of a laminated iron core without caulking or welding the tip of the electrode. This is the first object.
[0006]
Further, the present invention provides a stator for a reluctance motor that does not cause winding breakdown even when the tension of a coil in a winding portion is increased in order to prevent the electrodes from coming apart. As a second object.
[0007]
Another object of the present invention is to provide a stator of a reluctance motor which does not require unnecessarily increasing the tension of a coil in a winding part in order to prevent the electrodes from being separated.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 forms a winding part by winding a coil around each of a plurality of laminated cores divided in an output axis direction for each electrode unit, and forms the plurality of laminated cores. In a stator of a reluctance motor in which an iron core is connected in a cylindrical shape, the winding portion is formed by winding a coil so that the number of windings decreases from the outer peripheral side to the inner peripheral side of the laminated core, and It is characterized in that the winding tension on the side where the number is reduced is increased as compared with the other side.
[0009]
By forming in this way, when forming the winding portion, by crimping or welding the leading end side of the laminated core by increasing the winding tension of the coil on the side where the number of coil windings is reduced, from the other side. It is possible to prevent the electrodes from being separated by putting together the laminated cores. Therefore, the electromagnetic performance does not decrease at the swaging position or the welding position.
[0010]
According to a second aspect of the present invention, in addition to the features of the first aspect of the present invention, a spacer that covers at least a corner of the laminated core is attached to an outer peripheral portion of each of the laminated cores. is there.
[0011]
With this configuration, when forming the winding portion, the outer peripheral portion of the laminated core is covered with the spacer, so that the coil does not directly contact the corner of the laminated core. For this reason, even when the winding tension is increased, winding insulation breakdown does not occur at the corners of the laminated core.
[0012]
According to a third aspect of the present invention, in addition to the features of the second aspect, the spacer is formed of a highly rigid material.
[0013]
With this configuration, the laminated core can be pressed down integrally by forming the spacer from a highly rigid material. For this reason, the laminated cores can be integrated together without unnecessarily increasing the winding tension.
[0014]
According to a fourth aspect of the present invention, in addition to the features of the second aspect of the invention, the spacer is formed so as to increase in thickness from the outer peripheral side to the inner peripheral side of the laminated core. It is characterized by the following.
[0015]
With this configuration, the thickness of the spacer is different between the outer peripheral side and the inner peripheral side of the laminated core, and the spacer is thicker on the inner peripheral side. For this reason, even if the spacer is not formed of a highly rigid material, the rigidity of the spacer located on the inner peripheral side of the laminated core is increased, and the laminated core can be pressed integrally. Therefore, similarly to the case where the spacer is formed of a high-rigidity material, the laminated iron core can be integrally formed without increasing the winding tension more than necessary.
[0016]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
[0017]
According to the stator of the reluctance motor according to the first aspect of the present invention, on the side where the number of coil windings is reduced, the coil winding force is made stronger than the other side to form the winding portion.
[0018]
Therefore, it is possible to prevent the electrodes from coming apart, by integrating the laminated cores without crimping or welding the tip side of the laminated cores. For this reason, the performance of the reluctance motor can be enhanced without the electromagnetic performance decreasing at the swaging position or the welding position.
[0019]
Further, since it is not necessary to apply a strong tension to the entire coil, the extension of the coil can be minimized.
[0020]
According to the stator of the reluctance motor according to the second aspect of the present invention, the winding portion is formed by covering the outer peripheral portion of the laminated core with the spacer.
[0021]
Therefore, since the spacers are interposed between the corners of the laminated core and the coil, even when the winding tension is increased, winding insulation breakdown does not occur at the corners of the laminated core.
[0022]
According to the stator of the reluctance motor according to the third aspect of the invention, the spacer is formed of a highly rigid material.
[0023]
Therefore, the laminated iron core can be pressed integrally by the spacer. For this reason, the laminated cores can be integrated together without unnecessarily increasing the winding tension.
[0024]
According to the stator of the reluctance motor according to the fourth aspect of the present invention, the spacer is thick on the inner peripheral side of the laminated core.
[0025]
Therefore, the rigidity of the spacer located on the inner peripheral side of the laminated core can be increased without forming the spacer with a highly rigid material, so that the laminated core can be pressed down integrally. Therefore, similarly to the case where the spacer is formed of a high-rigidity material, the laminated iron core can be integrally formed without increasing the winding tension more than necessary.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
[0027]
1 to 4 show a stator of a reluctance motor according to the present invention. FIG. 1 is a cross-sectional view of a stator divided for each electrode unit, and FIG. 2 is a stator divided for each electrode unit. 3 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 4 is a cross-sectional view showing the entire structure. In FIG. 3, the coils are omitted.
[0028]
As shown in FIG. 4, the stator 10 of the reluctance motor according to the present invention forms the winding part 40 by winding the coil 30 around each of the plurality of laminated cores 20 divided in the output axis direction for each electrode unit. The plurality of laminated cores 20 are formed in a cylindrical shape.
[0029]
The coil 30 is wound around the stator 10 using a winding machine 100.
FIG. 7 is a diagram illustrating the winding machine 100.
The winding machine 100 has a main body 55 having two rotatable guide portions 120, and a winding rod 56 operated to move in the X, Y, and Z directions by the main body 55. The winding sent from the coil bundle 300 is guided to the winding rod 56 through the guide part 120.
[0030]
The stator 10 rotates about an axis parallel to the X direction of the winding rod 56 as a rotation axis, and winds the winding sent from the winding rod 56. The winding turn position and the winding tension are adjusted by moving the winding rod 56 in the X-axis, Y-axis, and Z-axis directions. That is, in the present embodiment, the winding rod 56 is wound such that the winding is wound more strongly on the stator 10 as the turn position moves toward the I side of the X axis of the winding rod 56 shown in FIG. Is operating.
[0031]
The laminated iron core 20 constituting each electrode is formed by laminating thin steel plates as shown in FIGS. 1 to 3. Further, the laminated core 20 is covered with a pair of upper and lower spacers 50 made of non-magnetic and insulating synthetic resin or the like so as to sandwich the outer peripheral portion of the laminated core 20 from above and below. As shown in FIGS. 1 and 2, the spacer 50 has outwardly directed flanges 51 at both ends located on the outer peripheral side and the inner peripheral side of the laminated core 20, respectively, and as shown in FIG. The central portion has a substantially U-shaped cross section so as to cover the laminated core 20.
[0032]
The spacer 50 is preferably formed of a highly rigid material. That is, by forming the spacer 50 from a high-rigidity material, the force for integrally pressing the laminated iron core 20 made of a thin steel plate can be increased.
[0033]
As shown in FIGS. 1 and 2, when winding the coil 30 around the laminated core 20, a pair of upper and lower fixing jigs 60 are used to fix the laminated core 20 and the spacer 50. That is, by sandwiching both flanges 51 of the spacer 50 with the pair of upper and lower fixing jigs 60 and vertically sandwiching the laminated core 20, the laminated core 20 and the spacer 50 are fixed, and the laminated core 20 and the spacer 20 are fixed. Rotate to perform winding. The fixing jig 60 is removed after the winding is completed.
[0034]
The winding part 40 is formed by winding the coil 30 so that the number of windings decreases from the outer peripheral side to the inner peripheral side of the laminated core 20. The reason why the number of windings on the outer peripheral side of the laminated core 20 is larger than that on the inner peripheral side is that when the stator 10 is formed by connecting the electrodes composed of the laminated core 20 into a cylindrical shape, the outer periphery of the laminated core 20 This is because the space on the side is larger than that on the inner peripheral side. With such a winding structure, the number of windings required for forming the electrodes can be secured.
[0035]
When the coil 30 is wound around the laminated core 20 to form the winding portion 40, the winding tension on the side where the number of windings is reduced (the inner peripheral side of the laminated core 20) is increased. (Outer peripheral side). That is, the winding part 40 is formed by detecting the turn position of the winding and increasing the tension of the winding toward the side where the number of windings decreases (the inner circumferential side of the laminated core 20).
[0036]
Next, another embodiment of the spacer will be described with reference to FIGS.
[0037]
5 and 6 show a spacer 70 according to another embodiment. FIG. 5 is a cross-sectional view of a stator divided for each electrode unit. FIG. 6 is a cross-sectional view of a stator divided for each electrode unit. It is a longitudinal cross-sectional view.
[0038]
The spacer 70 according to another embodiment is formed so as to increase in thickness from the outer peripheral side to the inner peripheral side of the laminated core 20, as shown in FIGS. That is, the spacer 70 is inclined such that the winding surface of the coil 30 increases in diameter from the inner peripheral side to the outer peripheral side of the laminated core 20. With such a structure of the spacer 70, the rigidity of the spacer 70 located on the inner peripheral side of the laminated core 20 can be increased without forming the spacer 70 with a highly rigid material, and the laminated core 20 can be integrally formed. The holding power can be strengthened.
[0039]
In the above-described embodiment, the laminated core 20 is integrally formed without crimping or welding the leading end side of the laminated core 20 by increasing the winding tension on the side of the reduced number of windings in the winding part 40 from the other side. Collectively, the electrodes can be prevented from being separated. Therefore, the electromagnetic performance does not decrease at the swaging position or the welding position.
[0040]
Further, in the present embodiment, the coil 30 does not directly contact the corners of the laminated core 20 by covering the outer peripheral portion of the laminated core 20 with the spacer 50. For this reason, even if the winding tension of the coil 30 is increased, winding insulation breakdown does not occur at the corners of the laminated core 20.
[0041]
Further, in the present embodiment, by forming the spacer 50 from a highly rigid material, the laminated core 20 can be pressed down integrally. Therefore, the laminated iron cores 20 can be integrated together without unnecessarily increasing the winding tension of the coil 30.
[0042]
Further, in the present embodiment, the thickness of the spacer 70 is made different between the outer peripheral side and the inner peripheral side of the laminated core 20 so that the thickness is increased on the inner peripheral side. For this reason, even if the spacer 70 is not formed of a highly rigid material, the rigidity of the spacer 70 located on the inner peripheral side of the laminated core 20 is increased, and the laminated core 20 can be integrally pressed. Therefore, similarly to the case where the spacer 70 is formed of a high-rigidity material, the laminated cores 20 can be integrally formed without unnecessarily increasing the winding tension of the coil 30.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state where a stator of a reluctance motor according to the present invention is divided for each electrode unit.
FIG. 2 is a longitudinal sectional view showing a state where the stator of the reluctance motor according to the present invention is divided for each electrode unit.
FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 1;
FIG. 4 is a cross-sectional view showing the entire structure of the stator of the reluctance motor according to the present invention.
FIG. 5 shows a spacer according to another embodiment, and is a cross-sectional view of a stator divided for each electrode unit.
FIG. 6 shows a spacer according to another embodiment, and is a longitudinal sectional view of a stator divided for each electrode unit.
FIG. 7 is a diagram illustrating a general winding machine.
FIG. 8 is a diagram illustrating a coil winding method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Stator 20 ... Laminated iron core 30 ... Coil 40 ... Winding part 50, 70 ... Spacer 51 ... Flange 56 ... Winding rod 60 ... Fixing jig 100 ... Winding machine

Claims (4)

A coil is wound around each of the plurality of laminated cores divided in the output axis direction for each electrode unit to form a winding portion, and in the stator of the reluctance motor in which the plurality of laminated cores are connected in a cylindrical shape,
The winding portion is formed by winding a coil so that the number of windings decreases from the outer peripheral side to the inner peripheral side of the laminated core, and the winding tension of the side having the reduced number of windings is compared with that of the other side. The stator of the reluctance motor, characterized by being strengthened. 2. The stator for a reluctance motor according to claim 1, wherein a spacer that covers at least a corner portion is attached to an outer peripheral portion of each of the laminated cores. The stator of a reluctance motor according to claim 2, wherein the spacer is formed of a highly rigid material. The stator of a reluctance motor according to claim 2, wherein the spacer is formed so as to increase in thickness from an outer peripheral side to an inner peripheral side of the laminated core.

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