JP3633272B2 - Reluctance motor stator and molding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reluctance motor stator and a molding apparatus for forming an electrode member for each electrode unit.
[0002]
[Prior art]
The stator of a reluctance motor has a plurality of salient poles, which are wound around a laminated iron core, projecting radially inward from the back yoke to rotate the rotor provided inside. The salient poles are formed in advance in a state of being divided in units of electrodes, and after winding a coil around the laminated iron core that becomes the salient poles, the salient poles are assembled so as to have a stator shape.
[0003]
If it does in this way, the coil winding operation | work to a laminated iron core can be made easy, and it is supposed that the manufacturing efficiency of a motor will also improve.
[0004]
In this specification, a portion having a yoke portion of the stator and a protrusion integrally protruding radially inward from the yoke portion is collectively referred to as an “electrode member”.
[0005]
[Problems to be solved by the invention]
However, when each laminated iron core to be a salient pole is formed in a state where it is divided in advance in units of electrodes, and these are joined later to form a stator, each salient pole of the formed stator and There is a problem that it is difficult to adjust the position of the rotor inside.
[0006]
This is because when the stator is formed, the electrode members are joined to each other, so that even if the size of each electrode member is the same, the position of the salient pole is shifted at the time of joining. Yes.
[0007]
Such a positional deviation of the salient poles causes, for example, a problem that an air gap interval between each salient pole and the rotor is different for each salient pole. When the motor is rotated, each salient pole has a problem with respect to the rotor. A difference occurs in the attractive force or the repulsive force, causing problems such as vibration of the rotor and vibration of the entire motor.
[0008]
Incidentally, although this air gap depends on the size (output) of the motor, it is necessary that the positions of all the salient poles coincide with each other with an error of about 0.2 mm. When a stator is formed by joining, it is difficult to form the stator within such a small error range.
[0009]
The present invention has been made to solve the above-described problems of the prior art, and a first object is to provide a plurality of salient poles when a plurality of electrode members are combined to form a cylindrical stator. It is an object of the present invention to provide a stator for a reluctance motor that does not cause a shift every time, that the motor rotates smoothly and is less likely to generate vibration.
[0010]
The second object is to provide a molding apparatus that can be molded so as to produce a preferable fracture surface when a plurality of electrode members are formed by dividing a stator base material integrally formed in a cylindrical shape.
[0011]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
[0012]
(1) A reluctance motor in which a plurality of electrode members each having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole are coupled to each other and arranged in a cylindrical shape. A stator of a reluctance motor characterized in that, in the stator, when each electrode member is formed from a stator base material integrally formed in a cylindrical shape, the stator base material is broken in the axial direction.
[0013]
(2) The stator base material has a notch portion extending in the axial direction on at least one of the inner peripheral surface and the outer peripheral surface so as to be broken for each electrode member, and fixing the reluctance motor Child.
[0014]
(3) The stator of the reluctance motor, wherein the cutout portion has a shape such that the blade portion of the divided member divided for each electrode unit does not reach the innermost portion.
[0015]
(4) Stator base material integrally formed in a cylindrical shape for forming an electrode member having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole. In the reluctance motor stator forming apparatus, the split member is inserted into and detached from the cylindrical stator base material by splitting the plurality of electrode members in the axial direction by a split member. An inner divided member provided externally and an outer divided member provided outside the stator base material, and at least one of the inner divided member and the outer divided member, the stator base material for each electrode member A blade portion that breaks in the axial direction, the inner divided member and the outer divided member are closely spaced from the axial direction of the stator base material, and the stator base material is separated from the blade portion and the other divided member. To be crushed by pinching between them A reluctance motor stator forming device.
[0016]
(5) Stator base material integrally formed in a cylindrical shape for forming an electrode member having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole. In the reluctance motor stator forming apparatus, the split member splits both ends of the stator base material from the axial direction. The stator is provided by providing at least one of the divided members with a blade portion for breaking the stator base material in the axial direction for each of the electrode members, and relatively separating and separating the divided members. An apparatus for molding a stator of a reluctance motor, wherein a base material is divided from an axial direction.
[0017]
【The invention's effect】
In the first aspect of the invention, when the stator base material formed integrally in a cylindrical shape is divided in the axial direction to form each electrode member, the stator base material is broken. The surface divided by the above becomes a surface with fine irregularities in a so-called jagged shape, and when joining the divided electrode members, if the fractured surfaces match each other, it fits securely and the same cylindrical shape as before the division The molded stator can be prevented from being displaced between the electrodes. When the stator is incorporated in a motor, the rotation becomes extremely smooth, and the generated vibration is extremely small.
[0018]
According to the second aspect of the present invention, since the notch portion extending in the axial direction is provided at the division starting point of the stator base material, the stator base material can be reliably secured to each electrode member by pressing the split member against the notch portion. Can be broken.
[0019]
In the invention according to claim 3, since the shape of the notch portion is set to an angle and a depth so that the blade portion of the dividing member does not reach the innermost portion, the stator base material can be reliably broken from the start of the division, and Inconveniences such as breakage of the divided member against the stator base material can also be prevented.
In the invention according to claim 4, the blade portion of the dividing member is brought into contact with at least one division position of the inner peripheral surface or the outer peripheral surface of the stator base material to divide the stator base material, and the stator base material Is pressed from both the inside and outside surfaces, so that the stator base material can be easily divided and molded so as to have a preferable fracture surface. In particular, it is preferably used when a stator base material formed by laminating a large number of thin plates is divided.
[0020]
In the invention according to claim 5, since the stator base material is pressed and divided in the axial direction from the end face, for example, the stator base material can be pressed and divided from both the upper and lower surfaces, and the stator base material can be divided. It can be easily divided and molded to produce a preferred fracture surface. In particular, it is preferable to use when dividing the integrally formed stator base material.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a horizontal sectional view showing a stator of a reluctance motor according to an embodiment of the present invention, FIG. 2 is a side view of the stator, and FIG. 3 is a schematic perspective view showing one electrode member of the stator. .
[0022]
As shown in FIG. 1, the stator 1 of the reluctance motor according to the present embodiment includes a plurality of electrode members 2 each having a yoke portion 2a and a protrusion 2b protruding inward in the radial direction from the yoke portion 2a. And when the coils 3 are wound around the protrusions 2b of the respective electrode members 2, the aforementioned salient poles are formed, and the rotor R provided in the internal space formed by the tip portion of each of the protrusions 2b. Can be rotated.
[0023]
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 this embodiment, the stator base material 4 formed in a cylindrical shape in advance is divided. In some cases, the dividing surface 5 is broken so as to be a surface with fine irregularities having a jagged shape.
Then, the divided surfaces 5 are united again to connect the electrode members 2 to each other, thereby forming the stator 1.
[0024]
As shown in FIGS. 1 and 2, if the dividing surface 5 has fine jagged irregularities as shown in FIGS. 1 and 2, the entire dividing surface becomes an irregular irregular surface, and each division surface is divided. Since the concavo-convex state for each surface 5 is also different, when reuniting these, only the surfaces that were originally fractured match each other, and once matched, they will be securely connected to each other. . In addition, even if the electrode members 2 are joined after the division, they can be formed in the same cylindrical shape as before the division, and even if the plurality of electrode members 2 are joined to form the stator 1, they are displaced between the electrodes. The motor rotates smoothly and there is little risk of vibration.
[0025]
In general, a magnetic steel plate is used as the stator base material 4, but this magnetic steel plate can be broken, and if it is broken when divided, the dividing surface 5 has fine irregularities. It becomes a surface.
[0026]
Therefore, both the case where the stator base material 4 is formed by laminating a large number of thin silicon steel plates, and the case where the stator base material 4 is integrally formed, are broken so that the split surface 5 is formed with a surface having fine irregularities. It becomes possible to do.
[0027]
Note that the position where the dividing surface 5 is formed may be any position as long as it is for each electrode unit, and is not necessarily an equivalent position as shown in FIG.
[0028]
Next, a forming apparatus for forming the electrode member 2 from the stator base material 4 will be described.
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 divided member, and FIG. 6 is a bottom view of the inner divided member.
[0029]
The forming apparatus 10 according to the first embodiment is preferable for use when dividing a stator base material 4 formed by laminating a large number of thin silicon steel plates. As shown in FIG. The child base material 4 is housed inside, the outer divided member 11 contacting the outer peripheral surface of the stator base material 4, and the stator base material 4 is entered into the inner peripheral surface of the stator base material 4. It is comprised from the inner side division member 15 which contact | abuts.
[0030]
The outer divided member 11 is held on a base outside the figure, and is provided with a plurality of support portions 13 from the inner peripheral surface of the cylindrical main body 12 toward the inner side as shown in FIGS. The tip 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 against the applied pressure by an inner divided member 15 described later.
[0031]
In the above-described embodiment, the tip of the support portion 13 is in contact with the middle of the split fracture position of each electrode member 2, but the tip of the support portion 13 is sharpened to form a blade portion. The blade portion may be in contact with the division position of each electrode member 2.
[0032]
The inner split member 15 can be moved up and down by a drive source such as a hydraulic device (not shown), and corresponds to the split fracture position downward from the lower surface of the disk-shaped body 16 as shown in FIGS. A plurality of broken pieces 17 project from each other, and a blade portion 18 having a sharp tip is formed on the outer surface side of each broken piece 17.
[0033]
The blade portion 18 is formed so as to be gradually located radially outward from the lower end toward the upper end, and the lower end portion of the blade portion 18 is in contact with the inner peripheral surface of the divided position of the stator base material 4. The upper end portion of the blade portion 18 is configured to be located outside the outer peripheral surface of the split fracture position of the stator base material 4.
[0034]
The operation of the molding apparatus 10 will be described.
First, the stator base material 4 is inserted into the outer divided member 11 so that the front end of the support portion 13 is positioned approximately in the middle of the divided fracture position of each electrode member 2.
[0035]
Next, the fracture piece 17 of the inner split member 15 is inserted from the upper part of the stator base material 4, the blade portion 18 is brought into contact with the split position on the inner peripheral surface of the stator base material 4, and the inner split member 15 is pushed down.
[0036]
As the inner dividing member 15 is lowered, the blade portion 18 of the broken piece 17 divides the stator base material 4 from above.
[0037]
At the time of the division, the stator base material 4 is not cut by the blade portion 18 of the inner division member 15, but is to be broken. Therefore, the division surface is a surface having fine jagged irregularities. Become.
[0038]
Therefore, when the electrode member 2 after the division is matched again, the divided surfaces are surely matched, and the stator base material 4 can be formed in the same cylindrical shape as that before the division.
[0039]
This division is performed for each electrode member 2, but the division position is not necessarily constant. For this reason, when the electrode member 2 after one layer division is matched again, there is also an advantage that the divided surfaces can be surely matched with each other.
[0040]
However, when this division work is performed more uniformly than the flow work, the stator base material 4 before the division is provided with a point or line as a mark for starting division as shown in FIG. 7, more preferably a notch. It is preferable to provide the part 6 on the inner peripheral side, the outer peripheral side or both the inner and outer sides of the electrode member 2. If it does in this way, it can divide | segment for every electrode member in the predetermined position of the stator base material 4, and it can also prevent that the undesirable electrode member by the division | segmentation surface extending in an unpreferable direction arises.
[0041]
In forming such a cutout portion 6, as shown in FIG. 7, the tip end of the blade portion 18 of the broken piece 17 has a predetermined angle or width so as not to reach the innermost portion of the cutout portion 6. It is preferable to form. If the cutout portion 6 having such a shape is used, the stator base material 4 can be reliably broken from the start of splitting, and inconveniences such as breakage of the split member 15 against the stator base material 4 can be prevented.
[0042]
Next, the shaping | molding apparatus which concerns on the 2nd Embodiment of this invention is demonstrated. FIG. 8 is a perspective view of a molding apparatus according to the second embodiment of the present invention.
In the molding apparatus 10 according to the first embodiment, the stator base material 4 is divided at a time by performing an operation of moving the inner division member 15 relatively close to and away from the outer division member 11. However, it is not always necessary to carry out by one operation, and the electrode members 2 may be divided one by one.
[0043]
The forming apparatus 10a according to the second embodiment is also preferably used when dividing the stator base material 4 formed by laminating a large number of thin silicon steel plates. As shown in FIG. It has the support part 13a and the broken piece 17a which divide | segment the member 2 individually.
[0044]
The support portion 13a is configured to divide the stator base material 4 from the outside of the stator base material 4 and the broken piece 17a from the inside of the stator base material 4. It is preferable that the internal fracture piece 17a is driven by a hydraulic device (not shown) and is configured to expand and contract in the radial direction by using, for example, a wedge effect of a wedge-shaped member driven by the hydraulic device (not shown). .
[0045]
Both of the support portion 13a and the broken piece 17a are provided with blade portions 13b and 17b along the longitudinal direction of the stator base material 4, and both are broken pieces. It is good also as a support part without a crack, and making the other into a fracture piece with a fracture function.
[0046]
In order to divide the stator base material 4 for each electrode member by the molding apparatus 10a, the support portion 13a and the fracture piece 17a are positioned on the inner peripheral side and the outer peripheral side of the stator base material 4, respectively. The blade portions 13b and 17b of the broken piece 17a are brought into contact with the divided positions of the electrode member 2, respectively.
[0047]
Next, the stator base material 4 is divided from both the inner and outer surfaces by pressing the blade portions 13b and 17b against the stator base material 4, respectively. Also at this time, if the notches 6 are provided in advance on both the inside and outside of the electrode member 2, the dividing surface of the stator base material 4 becomes the dividing surface having the fine irregularities described above.
[0048]
Therefore, when the divided electrode members 2 are coupled again, if the divided surfaces are matched and coupled, the cylindrical shape can be made substantially the same as before the division.
[0049]
Furthermore, the shaping | molding apparatus which concerns on the 3rd Embodiment of this invention is demonstrated. FIG. 9 is a perspective view of a molding apparatus according to the third embodiment of the present invention.
The forming apparatuses 10 and 10a according to the first and second embodiments are preferable for use in the stator base material 4 formed by laminating a large number of silicon steel plates, but according to the third embodiment. The forming apparatus 10b is preferable for use in the stator base material 4 integrally formed of a silicon alloy or the like.
[0050]
This forming apparatus 10b is composed of a pair of upper and lower broken pieces 22a and 22b in which a plurality of blade portions 21a and 21b facing the division positions are projected from the upper or lower surfaces of the annular main bodies 20a and 20b. One of these broken pieces 22a and 22b is fixed on a base (not shown), and the other can be moved up and down by a hydraulic device or the like.
[0051]
In order to divide the stator base material 4 for each electrode member by the molding apparatus 10b, for example, the stator base material 4 is placed on the fracture piece 22b fixed on the base, and the fracture piece is viewed from above. What is necessary is just to descend | fall 22a and to contact | abut the blade part 21a, 21b of each broken piece 22a, 22b to the division position of the electrode member 2, and to press.
[0052]
At this time, since the stator base material 4 is split by the blade portions 21a and 21b of the broken pieces 22a and 22b, a split surface having the same fine irregularities as described above is formed, and it is good at the time of joining again. Can be combined, and can have the same cylindrical shape as before the division.
[0053]
In this embodiment as well, the stator base material 4 is preferably provided with notches 6 on the upper and lower surfaces, but depending on the case, the notches 6 may also be provided on the inner peripheral side or the outer peripheral side of the electrode member 2. Good.
[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 divided member according to the embodiment.
FIG. 6 is a bottom view of the inner divided member of the embodiment.
FIG. 7 is a schematic cross-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]
1 ... Stator,
2 ... Electrode member,
2a ... projection,
2b ... Yoke part,
4 ... Stator base material,
5: Dividing surface,
6 ... Notch,
10, 10a, 10b ... molding apparatus,
11 ... outer divided member,
15 ... inner division member,
13b, 17b, 18, 21a, 21b... Blade part.

Claims (5)

In a stator of a reluctance motor in which a plurality of electrode members each having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole are coupled to each other and arranged in a cylindrical shape. ,
A stator of a reluctance motor, wherein when forming each electrode member from a stator base material integrally formed in a cylindrical shape, the stator base material is broken in the axial direction. 2. The relatance according to claim 1, 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. The stator of the reluctance motor according to claim 2, wherein the notch portion has a shape such that a blade portion of a split member that breaks the stator base material does not reach the innermost portion. A stator base material integrally formed in a cylindrical shape is divided to form an electrode member having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole. In the reluctance motor stator forming apparatus, in which the plurality of electrode members are formed by dividing in the axial direction by a member,
The split member includes an internal split member provided in an insertable / removable manner inside the cylindrical stator base material, and an external split member provided outside the stator base material, and the internal split member or At least one of the outer divided members is provided with a blade portion for breaking the stator base material in the axial direction for each of the electrode members, and the inner divided member and the outer divided member are closely spaced from the axial direction of the stator base material. A stator forming apparatus for a reluctance motor, wherein the stator base material is sandwiched between the blade portion and the other divided member to be broken. A stator base material integrally formed in a cylindrical shape is divided to form an electrode member having a yoke portion and a protruding portion that protrudes radially inward from the yoke portion to form a salient pole. In the reluctance motor stator forming apparatus, in which the plurality of electrode members are formed by dividing in the axial direction by a member,
The split member is arranged so as to split both end surfaces of the stator base material from the axial direction, and at least one of the split members is a blade for breaking the stator base material in the axial direction for each of the electrode members A stator forming apparatus for a reluctance motor, wherein a stator base material is divided from an axial direction by providing a portion and relatively separating and separating both divided members.

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