JPH11289727A - Stator of reluctance motor and its forming device - Google Patents

Abstract

(57) [Problem] To form a cylindrical stator by combining a plurality of electrode members, there is no displacement between the plurality of electrodes, the rotation is smooth, and the reluctance hardly generates vibration. Provide a motor stator. SOLUTION: A yoke part 2b and a protrusion 2a protruding radially inward from the yoke part 2b to form a salient pole.
When forming each of the electrode members 2 from a stator base material 4 integrally formed in a cylindrical shape in a stator of a reluctance motor in which a plurality of electrode members 2 having The stator base material 4 is broken in the axial direction, and the split surface 5 formed by the break is formed as a surface with fine jagged irregularities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for a reluctance motor and a molding device for forming an electrode member for each electrode unit.

[0002]

2. Description of the Related Art In a stator of a reluctance motor, a plurality of salient poles each having a coil wound around a laminated iron core are projected radially inward from a back yoke to rotate a rotor provided therein. However, these salient poles are formed in a state of being divided in advance for each electrode unit, and after winding a coil around a laminated iron core to be the salient poles, each salient pole is assembled so as to have a stator shape. Like that.

[0003] It is said that this makes it easy to wind the coil around the laminated iron core, thereby improving the motor manufacturing efficiency.

[0004] In this specification, a portion having a yoke portion of a stator and a projection integrally projecting radially inward from the yoke portion is generally referred to as an "electrode member".

[0005]

However, in the case where the laminated iron cores serving as salient poles are formed in advance in a state of being divided for each electrode unit, and these are later joined to form a stator, There is a problem that it is difficult to adjust the positions of the salient poles of the stator and the rotor that enters the salient poles.

This is because, when the stator is formed, the salient poles are displaced at the time of joining even if the size of each electrode member is the same since the electrode members are joined and formed. Is due.

Such a displacement of the salient poles causes, for example, a problem that the air gap interval between each salient pole and the rotor differs for each salient pole. When the motor is rotated, each salient pole has a different position. A difference occurs in the suction force or the repulsion force with respect to the rotor, which causes a problem that the rotor vibrates or the entire motor vibrates.

Incidentally, this air gap depends on the size (output) of the motor, but the positions of all salient poles are about 0.2.
It is necessary to match with an error of about mm, and therefore, when the stator is formed by joining the divided electrode members, it is difficult to form the stator within such a small error range. Has become.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. A first object of the present invention is to form a cylindrical stator by connecting a plurality of electrode members. An object of the present invention is to provide a stator of a reluctance motor in which no deviation occurs for each salient pole, rotation of the motor is smooth, and vibration does not easily occur.

A second object of the present invention is to provide a molding apparatus capable of forming a plurality of electrode members by dividing a stator base material integrally formed in a cylindrical shape so that a preferable fracture surface is generated. And

[0011]

The object of the present invention is achieved by the following means.

(1) A plurality of electrode members having a yoke portion and a protrusion protruding radially inward from the yoke portion to form a salient pole are connected to each other and arranged in a cylindrical shape. In the stator for a reluctance motor, when forming each of the electrode members from a stator base material integrally formed in a cylindrical shape, the stator base material is configured to be broken in the axial direction. stator.

(2) The relatance, wherein the stator base material has a notch extending in an axial direction on at least one of an inner peripheral surface and an outer peripheral surface so as to be broken for each electrode member. Motor stator.

(3) A stator for a relatance motor, wherein the notch has a shape such that a blade of a dividing member for each electrode unit does not reach the innermost part.

(4) A cylindrically formed fixed member for forming an electrode member having a yoke portion and a protrusion protruding radially inward from the yoke portion to form a salient pole. In a shaping device for a stator of a reluctance motor, wherein a child base material is axially split by a split member and the plurality of electrode members are formed, the split member is formed inside the cylindrical stator base material. An internal dividing member provided so as to be able to be inserted and removed from the stator base member, and an external dividing member provided outside the stator base material, and fixed to at least one of the internal dividing member and the external dividing member for each of the electrode members. A blade portion for breaking the child base material in the axial direction is provided, the inner split member and the outer split member are separated from each other close to the axial direction of the stator base material, and the stator base material is split into the blade portion and the other. So that it breaks when pinched between members An apparatus for forming a stator of a reluctance motor, comprising:

(5) A cylindrically formed fixed member for forming an electrode member having a yoke portion and a protrusion projecting radially inward from the yoke portion to form a salient pole. In a shaping apparatus for a stator of a reluctance motor, in which a child base material is axially split by a split member and the plurality of electrode members are formed, the split member is formed by rotating both end surfaces of the stator base material. A blade portion is disposed so as to be divided from the direction, and at least one of the two divided members is provided with a blade portion for axially breaking the stator base material for each of the electrode members, and the two divided members are relatively close to and separated from each other. A stator forming apparatus for a reluctance motor, characterized in that a stator base material is divided in the axial direction by the following method.

[0017]

According to the first aspect of the invention, when the stator base material integrally formed in a cylindrical shape is divided in the axial direction to form each electrode member, the stator base material is broken. Therefore, the surface divided by this break becomes a surface with fine jagged irregularities, so-called Can be formed in the same cylindrical shape as above, and the molded stator does not cause any displacement between the electrodes, and when used in a motor, the rotation becomes extremely smooth and the generated vibration is extremely small. It will be.

According to the second aspect of the present invention, since the notch portion extending in the axial direction is provided at the dividing start point of the stator base material, the stator member is pressed against the electrode member by pressing the split member against the notch portion. It can be reliably broken every time.

According to the third aspect of the present invention, the shape of the cutout portion is set to an angle and depth such that the blade portion of the divided member does not reach the innermost portion, so that the stator base material is reliably broken from the start of division. In addition, it is possible to prevent inconveniences such as breakage of the divided member by hitting the stator base material. According to the invention as set forth in claim 4, the blade portion of the split member abuts at least one of the inner circumferential surface and the outer circumferential surface of the stator base material to divide the stator base material, and the stator base material is divided. Is pressed from both the inside and outside, so that the stator base material can be easily divided and formed so as to produce a preferable fracture surface. In particular, it is preferably used when dividing a stator base material formed by laminating many thin plates.

According to the fifth aspect of the present invention, since the stator base material is divided by pressing the stator base material in the axial direction from the end face, for example, the stator base material can be pressed down from both upper and lower surfaces to be divided. The base material can be easily divided and shaped to produce a preferred fracture surface. In particular, it is preferable to use it when dividing an integrally molded stator base material.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a horizontal sectional view showing a stator of a reluctance motor according to an embodiment of the present invention.
Is a side view of the stator, and FIG. 3 is a schematic perspective view showing one electrode member of the stator.

As shown in FIG. 1, the stator 1 of the reluctance motor according to this embodiment has an electrode member 2 comprising a yoke 2a and a projection 2b projecting radially inward from the yoke 2a. And the projection 2 of each electrode member 2
When the coil 3 is wound around each of the protrusions 2b, the above-described salient poles are formed, and the rotor R provided in the internal space formed by the distal end portion of each of the protrusions 2b can rotate.

As shown in FIG. 3, each electrode member 2 is a member having a substantially T-shaped cross section perpendicular to the axis. In particular, in the present embodiment, the stator base material 4 previously formed in a cylindrical shape is used. Is divided so that the division surface 5 becomes a surface having fine jagged irregularities. The electrode surfaces 2 are connected to each other by combining the divided surfaces 5 again to form the stator 1.

When the divided surface 5 having the jagged fine irregularities is formed as described above, unlike the finely cut one, as shown in FIGS. 1 and 2, the entire divided surface becomes an irregular irregular surface. In addition, since the uneven state of each divided surface 5 is also different, when these are combined again,
Only the planes that were initially broken coincide with each other, and once they have coincided, they will be securely connected to firmly. Moreover,
Even if the electrode members 2 are combined after the division, the cylindrical shape can be substantially the same as that before the division. Even if the plurality of electrode members 2 are combined to form the stator 1, a displacement occurs between the electrodes. In this case, the rotation of the motor becomes smooth, and the possibility of occurrence of vibration is reduced.

In general, a magnetic steel sheet is used as the stator base material 4, but this magnetic steel sheet is rupturable. The surface has irregularities.

Therefore, in the case where the stator base material 4 is formed by laminating a large number of thin silicon steel sheets, or in the case where the stator base material 4 is integrally molded, the split surface 5 has fine irregularities by breaking. A surface can be formed.

The position at which the division surface 5 is formed may be any position as long as it is for each electrode unit, and need not necessarily be a uniform position as shown in FIG.

Next, a forming device for forming the electrode member 2 from the stator base material 4 will be described. FIG. 4 is a perspective view of the molding apparatus according to the first embodiment of the present invention, FIG. 5 is a plan view of the outer split member, and FIG. 6 is a bottom view of the inner split member.

The forming apparatus 10 according to the first embodiment includes a stator base material 4 formed by laminating a large number of thin silicon steel sheets.
Are preferably used when dividing the stator base material 4 as shown in FIG.
Split member 11 abutting on the outer peripheral surface of the stator base member 4
And an inner dividing member 15 that enters the inside of the base member and abuts on the inner peripheral surface of the stator base material 4.

The outer dividing member 11 is held on a base (not shown), and as shown in FIGS. 4 and 5, a plurality of support portions 13 are provided from the inner peripheral surface of the cylindrical main body 12 toward the inside. The distal end of the support portion 13 abuts on the outer peripheral surface of the stator base material 4, and the stator base material 4 is supported by an inner dividing member 15 described below against a pressing force.

In the above-described embodiment, the tip of the support portion 13 is brought into contact with almost the middle of the split breaking position of each electrode member 2. However, the tip of the support portion 13 is sharpened to form a blade portion. May be formed, and this blade portion may be brought into contact with the divided position of each electrode member 2.

The inner dividing member 15 can be moved up and down by a driving source such as a hydraulic device (not shown). As shown in FIGS.
A plurality of broken pieces 17 are protruded downward from the lower surface of the disc-shaped main body 16 so as to correspond to the split breaking positions, and the outer surface side of each broken piece 17 has a sharpened tip 1.
8 are formed.

The blade portion 18 is formed so as to be located radially outward from the lower end toward the upper end.
The upper end portion of the blade portion 18 is located outside the outer peripheral surface of the stator base material 4 at the split breaking position so that the lower end portion of the blade 8 contacts the inner peripheral surface of the stator base material 4 at the split position. It is configured as follows.

The operation of the molding apparatus 10 will be described. First, the stator base material 4 is inserted into the outer division member 11 so that the tip of the support portion 13 is located substantially in the middle of the division breaking position of each electrode member 2.

Next, the broken pieces 17 of the inner dividing member 15 are inserted from above the stator base material 4, and the blade portions 18 are brought into contact with the dividing positions on the inner peripheral surface of the stator base material 4, so that the inner dividing member 15 Press down.

When the inner dividing member 15 descends, the blade portion 18 of the broken piece 17 divides the stator base material 4 from above.

At the time of this division, the stator base material 4 is not cut by the blade portion 18 of the inner division member 15, but is split. Therefore, the division surface has fine jagged irregularities. Surface.

Therefore, when the electrode members 2 after division are made to coincide with each other again, the division surfaces surely coincide with each other, and the stator base material 4 can be formed in a substantially cylindrical shape as before the division.

This division is performed for each electrode member 2, but the division position is not always constant. For this reason, when the electrode members 2 after the further division are made to coincide again, there is also an advantage that the division surfaces can surely coincide with each other.

However, when this dividing operation is to be performed uniformly from the flow operation, the stator base material 4 before the division is provided with a point or a line as a mark for starting division as shown in FIG. Preferably, the notch 6 is provided on the inner peripheral side, the outer peripheral side, or both the inner and outer sides of the electrode member 2. In this way, it is possible to divide each electrode member at a predetermined position of the stator base material 4, and it is possible to prevent the occurrence of an undesired electrode member due to the division surface extending in an undesired direction.

In forming such a notch 6,
As shown in FIG. 7, it is preferable that the tip of the blade portion 18 of the broken piece 17 is formed to have a predetermined angle or width so as not to reach the deepest portion of the cutout 6. With the cutout 6 having such a shape, the stator base material 4 can be used from the start of division.
Can be reliably broken, and inconvenience such as breakage of the split member 15 against the stator base material 4 can also be prevented.

Next, a molding apparatus according to a second embodiment of the present invention will be described. FIG. 8 is a perspective view of a molding device according to the second embodiment of the present invention. The molding device 10 according to the first embodiment is configured to divide the stator base material 4 at a time by performing an operation of relatively moving the inner division member 15 toward and away from the outer division member 11. However, it is not always necessary to perform it in one operation, and one by one
One electrode member 2 may be divided.

The molding apparatus 10a according to the second embodiment also has
It is preferably used when dividing the stator base material 4 formed by laminating a large number of thin silicon steel sheets, and as shown in FIG. 8, a support portion 13a for dividing the electrode member 2 individually.
And broken fragments 17a.

The support portion 13a divides the stator base material 4 from the outside of the stator base material 4, and the broken pieces 17a divide the stator base material 4 from the inside of the stator base material 4. 13a
Is driven by a hydraulic device (not shown), and internal fragments 17
Preferably, a is configured to expand and contract in the radial direction by using, for example, a wedge effect of a wedge-shaped member driven by a hydraulic device (not shown).

Both the support portion 13a and the broken pieces 17a are formed along the longitudinal direction of the stator base material 4 by the blade portions 13b, 1b.
Although 7b is provided and both are broken pieces, depending on the case, one may be a support part without a breaking function and the other may be a broken piece with a breaking function.

In order to divide the stator base material 4 for each electrode member by the molding apparatus 10a, the support portions 13a and the broken pieces 17a are located on the inner and outer peripheral sides of the stator base material 4, respectively. Part 13a and blade parts 13b, 17 of broken piece 17a
b is brought into contact with the divided position of the electrode member 2.

Next, each of the blade portions 13b and 17b is pressed against the stator base material 4 to divide the stator base material 4 from both the inner and outer surfaces. Also in this case, if the cutouts 6 are provided in advance on both the inner and outer sides of the electrode member 2, the split surface of the stator base material 4 becomes the above-mentioned split surface having fine irregularities.

Therefore, when the divided electrode members 2 are to be joined again, if the divided surfaces are joined to each other and joined,
The cylindrical shape can be substantially the same as before the division.

Next, a molding apparatus according to a third embodiment of the present invention will be described. FIG. 9 is a perspective view of a molding device according to a third embodiment of the present invention. The forming apparatuses 10 and 10a according to the first and second embodiments are preferably used for a stator base material 4 formed by laminating a large number of silicon steel plates, but according to the third embodiment. Molding device 10b
Is preferably used for the stator base material 4 integrally formed of a silicon alloy or the like.

The molding device 10b is provided with an annular main body 20.
A plurality of upper and lower fragments 22a and 22b projecting from the upper surface or lower surface of the a and 20b, respectively, are provided with a plurality of blade portions 21a and 21b facing the dividing position. These broken fragments 2
One of the 2a and 22b is fixed on a base (not shown), and the other is movable up and down by a hydraulic device or the like. In some cases, both may be movable up and down.

The molding apparatus 10b allows the stator base material 4
In order to divide the broken pieces for each electrode member, for example, the stator base material 4 is placed on the broken pieces 22b fixed on the base, the broken pieces 22a are lowered from above, and the broken pieces 22a, 22b Blade portions 21a and 21b are brought into contact with the divided positions of the electrode member 2,
Press it.

At this time, the stator base material 4
a and 22b are divided by the blade portions 21a and 21b, so that a divided surface having fine irregularities similar to the above is formed, and good coupling can be performed at the time of coupling again, and the same cylindrical shape as before the division can be obtained. can do.

In this embodiment, the stator base material 4 is
It is preferable to provide the notch 6 on the upper and lower surfaces, but in some cases, the notch 6 may be provided on the inner peripheral side or the outer peripheral side of the electrode member 2.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a stator according to an embodiment of the present invention.

FIG. 2 is a side view of the stator.

FIG. 3 is a schematic perspective view showing one electrode member of the stator.

FIG. 4 is a perspective view showing a first embodiment of a molding apparatus according to the present invention.

FIG. 5 is a plan view of an outer split member of the embodiment.

FIG. 6 is a bottom view of the inner division member of the embodiment.

FIG. 7 is a schematic sectional view showing a main part of a stator base material.

FIG. 8 is a perspective view showing a second embodiment of the molding apparatus according to the present invention.

FIG. 9 is a perspective view showing a third embodiment of the molding apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stator, 2 ... Electrode member, 2a ... Protrusion, 2b ... Yoke part, 4 ... Stator base material, 5 ... Dividing surface, 6 ... Notch, 10, 10a, 10b ... Molding apparatus, 11 ... Outside division Member, 15: Inside divided member, 13b, 17b, 18, 21a, 21b: Blade part.

Continued on the front page (72) Inventor Shunji Oki 2 Nihonsan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa

Claims (5)

[Claims] 1. A reluctance in which a plurality of electrode members each having a yoke portion and a protrusion protruding radially inward from the yoke portion to form a salient pole are mutually connected and arranged in a cylindrical shape. In the stator of the motor, when each of the electrode members is formed from a stator base material integrally formed in a cylindrical shape, the stator base material is broken in an axial direction. Child. 2. A stator according to claim 1, wherein said stator base material has a notch extending in an axial direction on at least one of an inner peripheral surface and an outer peripheral surface so as to be broken for each electrode member. The stator of the relatance motor according to 1. 3. The reluctance motor according to claim 2, wherein the notch has a shape such that a blade portion of the split member for breaking the stator base material does not reach the innermost portion. stator. 4. A stator integrally formed in a cylindrical shape for forming an electrode member having a yoke portion and a protrusion protruding radially inward from the yoke portion to form a salient pole. In a forming apparatus for a stator of a reluctance motor, in which a base material is axially split by a split member and the plurality of electrode members are formed, the split member is provided inside the cylindrical stator base material. An internal split member provided so as to be able to be inserted and removed, and an external split member provided outside the stator base material. At least one of the internal split member and the external split member includes a stator for each of the electrode members. Providing a blade portion for breaking the base material in the axial direction, separating the inner divided member and the outer divided member from the axial direction of the stator base material and separating the stator base material from the blade portion and the other divided member So that it breaks Molding apparatus of the stator of the reluctance motor, characterized in that. 5. A stator integrally formed in a cylindrical shape for forming an electrode member having a yoke portion and a protrusion protruding radially inward from the yoke portion to form a salient pole. In a stator forming apparatus for a reluctance motor, in which a base material is axially divided by a split member and the plurality of electrode members are formed, the split member is configured such that both end surfaces of the stator base material are axially oriented. Is arranged so as to be divided from at least one of the two divided members, by providing a blade portion for breaking the stator base material in the axial direction for each of the electrode members, by relatively approaching and separating the two divided members A stator forming apparatus for a reluctance motor, wherein a stator base material is divided in an axial direction.