JPH09285087A - Rotor of reluctance synchronous motor and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the rotor of a reluctance synchronous motor and its manufacturing method with which a sufficient strength can be obtained by the simple technology. SOLUTION: A plurality of trenches are cut in a disc-shaped substrate 7 including the edge part 39 of a whole circumference. A plurality of the substrates 7 are laminated successively in an axial direction so as to have the positions of the respective trenches aligned with predetermined positions to form a shaft part 41. Then the trenches are filled with fillers 11 and then the edge part 39 is removed to obtain the shaft part 41. Or, a plurality of disc-shaped substrates 7 are laminated to form a shaft part 41 and a plurality of trenches are formed in the outer circumferential parts of the laminated substrates including the edge parts 39 of the whole circumference so as to penetrate in the axial direction and, after that, the trenches 37 are filled with the fillers 11 and then the edge part 39 is removed to obtain a rotor 1. The trenches are formed in the press forming of the substrate 7 or formed by a wire saw after the substrates 7 are laminated. Further, a reinforcing member 17 is applied to the outer circumference surface of the shaft part 41 and end plates 15 are provided on both the end surfaces in the axial direction of the shaft part 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reluctance synchronous motor rotor having magnetic anisotropy in which magnetic flux is partially concentrated and provided with a bent magnetic path, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a rotor of a reluctance synchronous motor (hereinafter referred to as "RSM"), FIGS.
There is something like that shown in

That is, referring to FIG. 5, in this rotor 101, a simple protrusion 105 is provided by providing a notch 103 in a magnetic cylinder. FIG.
In this rotor 107, several layers of iron plates 111 are connected by rivets 109 and also connected and fixed to other core segments, and further fixed to the base 115 by bolts 113. Further, referring to FIG. 7, in the rotor 117, the iron plate 119 and the non-magnetic layer 1 are used.
21 are alternately stacked and connected to each other with rivets 123 and fixed to the base 127 with bolts 125.

[0004]

However, in the rotor 101 provided with the simple protrusion 105 as shown in FIG. 5 described above, if the protrusion 105 is small, a sufficient torque cannot be obtained, so that the desired torque is not obtained. In order to obtain the above, it is necessary to enlarge the rotor 101 or the protrusion 105, which causes a problem that the RSM as a whole becomes large.

Further, as shown in FIGS. 6 and 7, in the rotors 107 and 117 which are constructed by using fasteners such as bolts 113 and 125, rivets 109 and 123, and an adhesive,
Since the strength against the centrifugal force that acts when the rotors 107 and 117 rotate depends on the fastening strength of the bolts 113 and 125, etc., when the torque is increased by increasing the magnetic path, the bolts 113 and 125 become smaller and the strength against the centrifugal force is low. Become. Alternatively, if the bolts 113 and 125 are made larger in order to increase the strength against centrifugal force, the magnetic path becomes smaller and the torque becomes smaller.

In order to solve such a problem, a method of integrating a laminated block of a magnetic material and a non-magnetic material corresponding to the poles can be considered. In such a method, a process of high technology such as metal bonding is performed. There is a problem that is required.

Further, in any of the above-mentioned cases, since the rotor is entirely made of metal, the heat loss due to the eddy current including the harmonic current component at the time of inverter drive is large, and the rotor heat is generated although it is not as great as the induction motor. There is a problem that the rotor is deformed.

Further, in order to avoid such a problem,
As shown in FIG. 8, a rotor 131 in which a plastic material is used for the non-magnetic material portion 129 is conceivable, but such a rotor 131 needs a protrusion 133 in order to secure strength against centrifugal force. At this point, there is a problem that the torque ripple becomes large because the magnetic distortion occurs, and the torque becomes small due to this distortion.

The object of the present invention has been made by paying attention to the above-mentioned conventional techniques, and by molding with a simple technique, reluctance synchronization capable of obtaining a sufficient strength especially against centrifugal force. A rotor for a motor and a method for manufacturing the same are provided.

[0010]

In order to achieve the above object, in a rotor for a reluctance synchronous motor according to a first aspect of the present invention, a core portion, which is a rotation center, and a magnetic material and a non-magnetic material are alternately laminated. Therefore, the whole circular plate-like base material having a laminated portion in which a plurality of grooves for filling the filler are cut out is provided around the core portion in a number corresponding to the number of poles, and this base material corresponds to the position of the groove. By having a plurality of shaft portions laminated in the axial direction of the core portion, and a pair of end plates at both axial ends of the shaft portion and covering the lowermost or uppermost base material, It is characterized in that the pair of end plates are integrally attached by a filling material with which the groove is filled. Therefore, a plurality of grooves are cut around the core portion of the circular base material so that the magnetic material and the non-magnetic material are alternately laminated, and the base material is laminated in the axial direction to form the shaft portion. Since a number of magnetic paths corresponding to the number of poles are formed on the shaft portion of the rotor, the magnetic paths are integrated in the acting direction of the centrifugal force and the resistance force is strong.
Further, since the end plates that cover both axial end surfaces of the shaft portion are integrally attached by the filling material with which the groove is filled, the strength of the rotor is increased.

A rotor for a reluctance synchronous motor according to a second aspect of the present invention is characterized in that the groove according to the first aspect is a concentric circle having a center near the outer peripheral edge of the base material. Therefore, each magnetic path provided on the base material has a shape that constitutes a part of a concentric circle that is concave toward the center of the base material.

A rotor for a reluctance synchronous motor according to a third aspect of the present invention is characterized in that the groove according to the first aspect is a straight line that approximates a concentric circle having a center near the outer peripheral edge of the base material. . Therefore, each magnetic path provided on the base material has a shape formed by parallel lines that approximate a part of a concentric circle that is concave toward the center of the base material.

In a rotor for a reluctance synchronous motor according to a fourth aspect of the present invention, the base material according to the first, second and third aspects is a magnetic material, and the filling material with which the groove is filled is a non-magnetic material. It is what Therefore, the magnetic path is formed by filling the non-magnetic material in the concentric circle-shaped or parallel straight-line multi-layered grooves provided on the base material which is the magnetic material.

According to a fifth aspect of the rotor for a reluctance synchronous motor of the present invention, the base material of the first, second and third aspects is a non-magnetic material, and the filling material with which the groove is filled is a magnetic material. It is what Therefore, the magnetic path is formed by filling the concentric circle-shaped or parallel straight-line-shaped multi-layered grooves provided in the base material which is a non-magnetic material with the magnetic material.

A rotor for a reluctance synchronous motor according to a sixth aspect of the present invention is characterized in that the end plate according to the first aspect is formed of the same material as the filling material. Therefore, since the end plates that cover both axial end surfaces of the shaft portion are formed integrally with the filler that fills the groove, the strength of the rotor is increased.

A rotor for a reluctance synchronous motor according to a seventh aspect of the invention is characterized in that a reinforcing member is wound around the outer periphery of the shaft portion according to the first aspect. Therefore, the strength of the shaft is increased by the reinforcing material wound around the outer periphery of the shaft.

In the method for manufacturing a rotor for a reluctance synchronous motor according to an eighth aspect of the present invention, a magnetic material or a non-magnetic material is filled around a core portion, which is a central axis of a disk-shaped base material, so as to be alternately laminated. A plurality of grooves are cut out to form a number of laminated portions corresponding to the number of poles, an outermost peripheral portion is provided with an edge portion over the entire circumference, and a plurality of the base materials are laminated in correspondence with the positions of the grooves. After forming the shaft portion, the groove is filled with a filling material, and then the edge portion is cut off.
Therefore, first, prepare a plurality of circular base materials that are notched with an edge portion and multiple grooves on the entire circumference, and align the positions of the grooves of each base material with a predetermined position to move the base materials one after another in the axial direction. The groove is filled with a filling material after forming the shaft portion by stacking on the above, and then the edge portion is removed to form the shaft portion, so that the manufacturing is facilitated and each base material is moved in the centrifugal force acting direction. Since it is one, it has a great resistance.

According to a ninth aspect of the present invention, there is provided a method for manufacturing a rotor for a reluctance synchronous motor, wherein a plurality of disc-shaped base materials are laminated in the axial direction to form a shaft portion, and the outer peripheral portion of the base material has a full circumference. A plurality of grooves for filling the filler are axially cut out in order to alternately stack the magnetic material and the non-magnetic material around the core portion, which is the central axis of the shaft portion with the edge portion extending over Is formed, the groove is filled with a filling material, and then the edge portion is cut off. Therefore, first, the disc-shaped base materials are laminated to form the shaft portion, and then the peripheral portion of the base material and the plurality of grooves are formed so as to penetrate the shaft portion in the axial direction. Since the groove is then filled with the filling material, the groove does not shift in relation to each base material. Since the rotor is manufactured by removing the edge portion after filling the filling material, the manufacturing is easy. Further, since the shaft portion is integrated in the axial direction and the axis orthogonal direction, the strength of the rotor is increased.

The method of manufacturing a rotor for a reluctance synchronous motor according to the tenth aspect of the present invention is characterized in that the base material and the groove of the base material are formed by press molding. Therefore, since the edge portion and the groove are provided in the base material by press molding, the rotor can be easily manufactured.

The method for manufacturing a rotor for a reluctance synchronous motor according to an eleventh aspect of the present invention is characterized in that the groove is formed by a wire saw with the edge portions according to the eighth and ninth aspects provided. Therefore, an edge portion and a groove are formed by a wire saw on the shaft portion manufactured by laminating each base material or base materials.

A method for manufacturing a rotor for a reluctance synchronous motor according to a twelfth aspect of the present invention is characterized in that, after removing the edge portion according to the eighth and ninth aspects, a reinforcing material is wound around the outer peripheral surface of the shaft portion. It is a thing. Therefore, by winding the reinforcing material around the outer peripheral surface of the shaft portion, the strength of the rotor in the centrifugal force acting direction is increased.

In a method for manufacturing a rotor for a reluctance synchronous motor according to a thirteenth aspect of the present invention, in the step of filling the filler according to the eighth, ninth and twelfth aspects, end plates are integrally provided on both axial end faces. It is characterized by. Therefore, the strength of the rotor is increased because it is integrated in the axial direction.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a reluctance synchronous motor rotor 1 according to the present invention. This rotor 1
Is a stack of a large number of circular plate-shaped magnetic plates 3 in the axial direction with respect to the plane orthogonal to the axis (see FIG. 1B).

In the magnetic plate 3, the core portion 5 which is the center of rotation is used.
Around the base material 7 which is a magnetic body, the magnetic material 9 and the non-magnetic material 11 as a filling material are provided with the laminated portions 13 in which magnetic paths are concentrically formed in the number corresponding to the number of poles. (See FIG. 1A, four here), forming a circular cross section as a whole.

At both axial ends (upper and lower ends in FIG. 1B) of the rotor 1, end plates 15 covering the entire surfaces of the magnetic plates 3 at both ends are provided.
Is provided integrally with the non-magnetic material 11. Further, a plastic fiber sheet 17 as a reinforcing material is wound around the outer peripheral surface of the magnetic plate 3, that is, the outer peripheral surface of the rotor 1.

In the rotor 19 shown in FIG. 2, the base material 21 is made of a non-magnetic material and the magnetic material 23 and the non-magnetic material 2 are used.
5 and the rotor 2 shown in FIG.
7, the laminated portion 33 composed of the magnetic material 29 and the non-magnetic material 31 may be formed by straight lines instead of concentric circles.

Next, a method of manufacturing the rotor 1 described above will be described.

Referring to FIG. 4, the magnetic plate 35 before assembly of the rotor 1 is composed of a groove 37 filled with a non-magnetic material such as plastic and an edge portion 39 necessary for manufacturing. The magnetic plate 35 is manufactured by, for example, press-molding one by one from a plate-shaped raw material and forming grooves 37 and edges 39 of a non-magnetic material.
And the outer shape and the like are molded collectively or separately.

With reference to FIG. 1B, the magnetic plate 35 (see FIG. 4) produced as described above is axially laminated with the radial directions aligned, and the shaft portion 41 is produced. A non-magnetic material such as plastic is filled in the groove 37 provided in the previous step in the direction of the arrow in FIG. After that, the edge portion 39 provided for manufacturing is cut and removed, and the plastic fiber sheet 17 is wound on the outside and bound in the radial direction.

Alternatively, referring to FIG. 1B, in order to further increase the strength against the centrifugal force due to rotation, the nonmagnetic end plates 15 and 15 at both axial ends of the rotor 1 and the laminated portion 13 are formed. After integrally molding the non-magnetic material 11 filled in the groove 37, the plastic fiber sheet 17 is wound and bound in the radial direction.

From the above results, the laminated portion 13 and the non-magnetic end plates 15, 15 at both ends in the axial direction can be integrally molded with a non-magnetic material such as plastic, so that the strength of the rotor 1 can be increased.

Further, since it is integrally molded, it does not require a high-level technique of metal-bonding the blocks, and since it is possible to perform collective molding with an injection molding machine or the like, the manufacturing time of the rotor 1 can be shortened. .

Further, by laminating the magnetic plates 3 adjacent to each other with a slight phase difference, the rotor skew can be easily realized and the characteristics of the motor can be improved.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, in the above-described embodiment, the groove 37 and the edge portion 3 are first formed by press molding.
A magnetic plate 35 on which 9 and the like are formed is loaded, but instead of this, a large number of disk-shaped magnetic plates 35 obtained by press molding are first stacked in the axial direction and fixed to form a rod-shaped non-magnetic material. The filling grooves 37 may be collectively provided in the axial direction with a wire saw or the like.

[0036]

As described above, in the rotor for a reluctance synchronous motor according to the first aspect of the present invention, a plurality of grooves are cut around the core portion of the circular base material so that the magnetic material and the non-magnetic material are formed. Are alternately laminated, and the base material is laminated in the axial direction to form the shaft portion, thereby forming the magnetic paths of the number corresponding to the number of poles in the shaft portion of the rotor. Since it can be integrally formed, the resistance to centrifugal force can be increased. Also,
Since the end plates that cover both axial end surfaces of the shaft portion are integrally attached by the filling material with which the groove is filled, they can be integrated in the axial direction as well, and the strength of the rotor can be increased.

In the rotor for a reluctance synchronous motor according to the second aspect of the present invention, each magnetic path provided in the base material has a shape that constitutes a part of a concentric circle that is concave toward the center of the base material.

In the rotor for a reluctance synchronous motor according to the third aspect of the present invention, each magnetic path provided in the base material is formed by parallel lines that approximate a part of concentric circles that are concave toward the center of the base material. It becomes the shape to be.

In the rotor for a reluctance synchronous motor according to the fourth aspect of the present invention, a multi-layered groove of concentric circles or parallel straight lines approximate to the concentric circles provided on the base material which is a magnetic material is filled with a non-magnetic material. Forming a path.

In the rotor for a reluctance synchronous motor according to the fifth aspect of the present invention, the magnetic material is filled in the concentric circular or parallel straight-line-shaped multi-layered grooves provided on the base material which is a non-magnetic material to form a magnetic material. Forming a path.

In the rotor for a reluctance synchronous motor according to the sixth aspect of the present invention, the end plates that cover both axial end surfaces of the shaft portion are formed of the same material as the filling material with which the groove is filled, and are integrally provided. Therefore, the strength of the rotor can be increased.

In the rotor for a reluctance synchronous motor according to the seventh aspect of the present invention, the strength in the direction in which the centrifugal force acts can be increased by the reinforcing material wound around the outer periphery of the shaft portion.

In the method for manufacturing a rotor for a reluctance synchronous motor according to the invention of claim 8, first, a plurality of circular base materials having notched edge portions and a plurality of grooves are formed in advance, and each base material is manufactured. While aligning the position of the groove with a predetermined position, the base materials are sequentially laminated in the axial direction to form the shaft portion, and then the groove is filled with the filler, and then the edge portion is removed to form the shaft portion. The manufacturing can be simplified. Further, since each base material is integrated in the centrifugal force acting direction, the resistance force to the centrifugal force can be increased.

In the method for manufacturing a rotor for a reluctance synchronous motor according to a ninth aspect of the present invention, first, disc-shaped base materials are laminated to form a shaft portion, and then an outer peripheral edge portion of the base material is formed over the entire circumference. Since a plurality of grooves are formed so as to penetrate the shaft portion in the axial direction and then the filling material is filled into the grooves, the grooves do not shift in relation to each base material. Since the rotor is manufactured by removing the edge portion after the filling material is filled, the manufacturing can be simplified. Further, since the shaft portion is integrated in the axial direction and the axis orthogonal direction, the strength of the rotor can be increased.

In the method for manufacturing a rotor for a reluctance synchronous motor according to the tenth aspect of the present invention, since the edges and grooves are formed in the base material by press molding, the rotor can be manufactured very easily.

In the method for manufacturing the rotor for a reluctance synchronous motor according to the invention of claim 11, since the edge portion and the groove are formed by the wire saw on the shaft portion manufactured by laminating the respective base materials or the base materials, the manufacturing is performed. It is very easy and can be manufactured in a short time.

In the method for manufacturing a rotor for a reluctance synchronous motor according to the twelfth aspect of the present invention, the strength of the rotor in the centrifugal force acting direction can be increased by winding the reinforcing material around the outer peripheral surface of the shaft portion.

In the method of manufacturing a rotor for a reluctance synchronous motor according to the thirteenth aspect of the present invention, since the rotor is integrated in the axial direction, the strength of the rotor can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing a rotor for a reluctance synchronous motor according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of a reluctance synchronous motor rotor according to the present invention.

FIG. 3 is a sectional view showing yet another embodiment of a rotor for a reluctance synchronous motor according to the present invention.

FIG. 4 is a cross-sectional view showing a step in a method of manufacturing a rotor for a reluctance synchronous motor according to the present invention.

FIG. 5 is a cross-sectional view showing the structure of a conventional rotor for a reluctance synchronous motor.

FIG. 6 is a sectional view showing a structure of a conventional rotor for a reluctance synchronous motor.

FIG. 7 is a sectional view showing the structure of a conventional rotor for a reluctance synchronous motor.

FIG. 8 is a sectional view showing a structure of a conventional rotor for a reluctance synchronous motor.

[Explanation of symbols]

 1, 19, 27 Rotor 5 Core part 7 Base material 11 Non-magnetic material (filler) 13 Laminated part 15 End plate 17 Plastic fiber sheet (reinforcing material) 37 Groove 39 Edge part 41 Shaft part

Claims (13)

[Claims] 1. A laminated portion, in which a core portion which is a center of rotation and a plurality of grooves for filling a filling material are cut out so that a magnetic material and a non-magnetic material are alternately laminated, is formed in a number of poles around the core portion. An entire circular plate-shaped base material having a corresponding number, a shaft portion in which a plurality of base materials are laminated in the axial direction of the core portion in correspondence with the positions of the grooves, and both axial end portions of the shaft portion. And a pair of end plates covering the lowermost or uppermost base material, wherein the pair of end plates are integrally attached by a filling material with which the groove is filled. Reluctance synchronous motor rotor. 2. The groove is a concentric circle having a center near the outer peripheral edge of the base material.
A reluctance synchronous motor rotor as described. 3. The rotor for a reluctance synchronous motor according to claim 1, wherein the groove is a straight line that approximates a concentric circle having a center in the vicinity of the outer peripheral edge of the base material. 4. The reluctance synchronous motor rotor according to claim 1, wherein the base material is a magnetic material, and the filling material filling the groove is a non-magnetic material. 5. The reluctance synchronous motor rotor according to claim 1, wherein the base material is a non-magnetic material, and the filling material with which the groove is filled is a magnetic material. 6. The rotor for a reluctance synchronous motor according to claim 1, wherein the end plate is made of the same material as the filling material. 7. The rotor for a reluctance synchronous motor according to claim 1, wherein a reinforcing material is wound around the outer periphery of the shaft portion. 8. A plurality of grooves are cut out to fill a magnetic material or a non-magnetic material around a core portion, which is a central axis of a disk-shaped base material, and to alternately stack the magnetic material or non-magnetic material. After forming a laminated portion and providing an edge portion over the entire circumference at the outermost peripheral portion, stacking a plurality of the base materials at the positions of the grooves to form a shaft portion, and then filling the groove with a filler. Then, the edge portion is cut off thereafter, and a method for manufacturing a rotor for a reluctance synchronous motor. 9. A central axis of the shaft portion, wherein a plurality of disc-shaped base materials are laminated in the axial direction to form a shaft portion, and the outermost peripheral portion of the base material is provided with an edge portion over the entire circumference. In order to alternately stack the magnetic material and the non-magnetic material around the core part, a plurality of grooves for filling the filling material are axially cut to form a number of laminated parts corresponding to the number of poles, and the grooves are formed in the grooves. A method for manufacturing a rotor for a reluctance synchronous motor, which comprises cutting the edge portion after filling with a filling material. 10. The method for manufacturing a rotor for a reluctance synchronous motor according to claim 8, wherein the base material and the groove of the base material are formed by press molding. 11. The method for manufacturing a rotor for a reluctance synchronous motor according to claim 8, wherein the groove is formed with a wire saw in a state where the edge portion is provided. 12. The reinforcing material is wound around the outer peripheral surface of the shaft portion after the edge portion is removed.
A method for manufacturing a rotor for a reluctance synchronous motor as described. 13. In the step of filling the filling material,
13. The method for manufacturing a rotor for a reluctance synchronous motor according to claim 8, 9, or 12, wherein end plates are integrally provided on both end surfaces in the axial direction.