JP2795572B2 - Synchronous machine rotor and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous machine, and more particularly to a structure of a rotor of a synchronous motor. The present invention relates to a rotating magnetic field of a stator on a substantially cylindrical peripheral surface of a rotor core fixed to a rotating shaft to form a yoke. The permanent magnets that generate rotational torque due to the interaction of the rotors are fixedly arranged on the surface, and each permanent magnet piece of the rotor having the structure provided is abutted on the abutting surface.
The present invention relates to an improved structure formed of a pair of magnet plate members so as to facilitate attachment to a peripheral surface of a rotor core and to prevent separation of the magnet pieces, and a method of manufacturing such a rotor.

[0002]

2. Description of the Related Art As a rotor of a synchronous machine, there are a radial type rotor in which a rotor core and a permanent magnet forming a yoke are alternately arranged in a circumferential direction, and a plurality of permanent magnet pieces on an outer peripheral surface of a cylindrical rotor core. There are many types of surface-attached rotors in which the two are fixed in a sticking manner. In the two types of synchronous machine rotors, the latter is generally a fixed structure in which a plurality of permanent magnet pieces are adhered to and adhered to the surface of a substantially cylindrical rotor core using an adhesive. Has taken. In this case, even when the rotor core is rotated for a long time in a state where it receives both the centrifugal force due to the rotation of the rotor and the magnetic attraction force based on the magnetic interaction between the stator and the magnetic field of the stator, the permanent magnet pieces of the rotor core can be used. In order not to peel off from the surface, it is required that the adhesive strength of the adhesive sufficiently exceed the combined force of the above-mentioned centrifugal force and magnetic attraction force acting on each permanent magnet piece. For this reason, avoiding relying only on the adhesive for fixing the permanent magnet piece, a recess is formed in the outer peripheral surface of the rotor core, and a part of the lower bottom surface side of the permanent magnet piece is submerged in the recess, thereby forming the recess. In some cases, a side wall of the permanent magnet piece is held by a side wall at a place.

[0003]

FIG. 9 (a) and FIG. 9 (b)
Is a standard structure of the above-described conventional surface-attached rotor of the synchronous machine, that is, the permanent magnet pieces are attached to each other with an adhesive and a shallow recess formed on the outer peripheral surface of the rotor core. This shows a rotor having a structure in which the peeling prevention function is improved as compared with a structure in which permanent magnet pieces are simply attached by lowering the bottom portion. That is, this rotor 1
1 is mounted on the rotor shaft 12 between the two end plates 15;
A plurality of recesses 16 extending in the axial direction on the outer peripheral surface of the fixed cylindrical rotor core 13 and extending in a dovetail shape toward the center of the rotating shaft 12 are formed at equal intervals in the circumferential direction. On the other hand, the permanent magnet piece 17 has a tapered side face 17 that has a bottom surface side that spreads in a dovetail shape from the top surface side in a complementary shape to the shape of the recess 16.
a and 17a are formed in a curved plate-shaped piece having both side faces, and are complementarily fitted into the recesses 16 of the rotor core 13 to form a mechanical lock structure. Has a structure that does not separate or peel off. In this structure, in the assembly process of fitting and assembling the permanent magnet pieces 17 into the recesses 16 of the rotor core 13,
A method is adopted in which each permanent magnet piece 17 is inserted into the recess 16 from the axial end face of the rotor core 13 in a plug-in manner and positioned at a predetermined position in the axial direction. So, for example,
When the rotor 11 is multi-staged in a plurality of stages in the axial direction, and between the stages, permanent magnet pieces 17 are arranged with phases shifted in the circumferential direction of the rotor to reduce a known torque ripple.
At the center stage, the assembling method in which the above-described insertion method is inserted into the recess 16 of the rotor core 13 in the axial direction does not allow assembling.

Therefore, as shown in FIGS. 10 (a) and 10 (b), the rotor 11a is inevitably multistaged in a plurality of stages in the axial direction (in the illustrated example, a three-stage structure), and a permanent magnet is provided between each stage. Piece 1
When the rotor 7 has a rotor structure in which the phases are shifted in the circumferential direction of the rotor to reduce the torque ripple, each permanent magnet piece 17 is formed by a simple cylindrical peripheral surface 13 a of the rotor core 13.
Had a structure to be attached with an adhesive. Of course, at this time, an appropriate adhesive is used so that the adhesive strength of the adhesive sufficiently exceeds the combined force of the centrifugal force due to rotation acting on each permanent magnet piece 17 and the magnetic attraction force acting between the stator. Although various design devise have been made, such as selection of the rotor core and roughening of the rotor core surface, it is hard to say that it is perfect in terms of reliability.

Accordingly, a main object of the present invention is to solve the above-described problems in the rotor of the conventional synchronous machine, particularly, the rotor of the surface-attached type. Another object of the present invention is to provide a surface-attached rotor in which a permanent magnet piece is fixed to a substantially outer peripheral surface of a rotor core, and can be assembled without complicating the assembly process, that is, without increasing the number of steps. A synchronous machine having a structure capable of imparting mechanical fixing strength that does not cause separation or detachment from the surface of the rotor core due to centrifugal force due to rotation and magnetic attraction force during magnetic interaction with a stator magnetic field To provide a surface-attached type rotor.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned object, the present invention is directed to forming a rotor having a surface-attached permanent magnet piece of a synchronous machine, wherein the rotor core has a substantially cylindrical surface. Forming a permanent magnet mounting seat of a shape, and abutting each permanent magnet piece to be fitted and fixed to the concave permanent magnet mounting seat so that a pair of magnet plate members can be separated at a predetermined abutting surface. The first member of the pair of magnet plate members is first fitted and fixed to a tapered surface provided on the side surface of the convex wall forming the permanent magnet mounting seat, and then the second magnet plate member is connected to the second magnet plate member. By slipping into the abutting surface of the first magnet member, it is possible to easily assemble, and to form a mechanical lock structure of the rotor core with the above-mentioned permanent magnet mounting seat to sufficiently resist peeling and detachment by an external force. Low made possible One in which you configure. According to this structure, even when the rotor is multi-staged in order to reduce the torque ripple, the first magnet plate member is attached from the radially outer side of the rotor core, and then the second magnet plate is attached to the abutting surface. By sliding the butting surfaces of the members into contact with each other, the second magnet plate member can also be attached to the recess of the rotor core with a mechanically locked structure, thereby facilitating assembly and preventing peeling and detachment. Both conditions of the structure can be satisfied. Of course, a pair of magnet plate members forming each permanent magnet piece and the surface of the rotor core are bonded and fixed with an adhesive.

That is, according to the present invention, there is provided a synchronous machine having a plurality of permanent magnet pieces rotatably disposed on the inner periphery of a stator and affixed and fixed to the surface of a substantially cylindrical rotor core. In the rotor, the cylindrical rotor core is disposed on the outer peripheral surface thereof at a predetermined interval in the circumferential direction, has a length substantially in the rotation axis direction of the rotor, and has a plurality of convex walls having a dovetail cross section. A plurality of substantially dovetail-shaped recesses formed between adjacent ones of the plurality of convex walls as concave mounting seats for the permanent magnet pieces. Each of the permanent magnet pieces forming the magnetic poles is composed of a pair of curved magnet plates that can be divided into two by a butting surface extending in the same direction as the rotation axis of the rotor, and a dovetail-shaped concave mounting seat of the rotor core. A wide divergence that can form a mechanical lock structure by close contact and engagement It has over tapered surface on both sides, and the 1
A synchronous machine rotor having a configuration in which the abutting surfaces of the pair of magnet plates form an inclined abutting surface having a predetermined inclination angle from a radial surface perpendicular to the outer peripheral surface of the rotor core is provided.

According to the present invention, in a method of manufacturing a surface-attached synchronous machine rotor in which a plurality of permanent magnet pieces are fixed to the outer peripheral surface of a substantially cylindrical rotor core, the cylindrical rotor core comprises: The plurality of convex walls are provided on the outer peripheral surface at predetermined intervals in the circumferential direction and have a length substantially in the rotation axis direction of the rotor, and a plurality of convex walls having a dovetail cross-sectional shape. A plurality of substantially dovetail-shaped recesses are formed as concave mounting seats for the permanent magnet pieces between the mutually adjacent convex walls, and each of the permanent magnet pieces forming the magnetic poles of the rotor is: A mechanical lock structure is formed by a pair of curved magnet plates that can be divided into two by an abutting surface extending in the same direction as the rotation axis of the rotor, and is closely attached to and engaged with the dovetail-shaped concave mounting seat of the rotor core. It has a possible divergent tapered surface on both sides, and The abutting surfaces of the pair of magnet plates are formed so as to form an inclined abutting surface having a predetermined inclination angle from a radial surface perpendicular to the outer peripheral surface of the rotor core. At the time of mounting on each of the concave mounting seats, the first magnet plate of the pair of magnet plates is circumferentially slid toward and inserted into one end of the dovetail-shaped concave mounting seat of the rotor core. Tapered engagement, and then the second magnet plate of the pair of magnet plates is brought into contact with the first magnet plate in tapered engagement with one end of a concave mounting seat of the rotor core. The second magnet plate is slid and engaged in the axial direction so as to abut against each other at this time. Taper engagement The peeling permanent magnet pieces to the rotor core, rotor manufacturing method of a synchronous machine so as to be fixed to the outer peripheral surface of the rotor core are provided so as to prevent separation. In the above,
Formed on the abutting surface of a pair of magnet plates forming a permanent magnet piece
The predetermined tilt angle is defined as the first tilt angle of the pair of magnet plates.
First, attach the magnet plate to the dovetail concave shape of the rotor core.
Sliding in the circumferential direction toward one end of the seat and inserting it for close contact
After the taper engagement with the
The second magnet plate is also mounted on the concave mounting seat of the rotor core.
One end contact manner engaged tapered engagement in the first Ma Gunetto plate
Slide the butting surface of the second magnet plate into the butting surface of
Easily slides diagonally when abutting surfaces
So that it can be inserted into the outer surface of the rotor core.
To the right angle from the vertical radial surface.
It means that we should do it. Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.

[0009]

FIG. 1 is a perspective view showing a first embodiment of a rotor of a synchronous machine according to the present invention. FIG. 2 is a perspective view showing a pair of magnet plates constituting a permanent magnet piece used in the rotor of the first embodiment. FIG. 3 (a) is a front view of the rotor of the first embodiment, FIG. 3 (b) is an end view taken along line 3-3 of FIG. 3 (a), and FIG. FIG. 5 is a front view of a synchronous machine rotor according to a second embodiment, and FIG.
FIG. 6 is a perspective view showing a permanent magnet piece used in the rotor of the third embodiment, FIG. 7 is a perspective view showing a fourth embodiment of the rotor of the synchronous machine according to the present invention, and FIG. It is a front view of the rotor of a 4th example.

Referring to FIGS. 1 to 3, the rotor 20 of the synchronous machine according to the first embodiment is provided as a rotor inside the inner peripheral surface of the stator 10, and includes a rotor shaft 22 and this rotor shaft. 22, wedge-mounted while being held in the axial direction by the end plate 21;
And a cylindrical rotor core 23 attached by fixing or the like. As shown in FIG. 1, a plurality of axially extending convex walls 24 arranged at equal intervals in the circumferential direction are arranged on the peripheral surface of the rotor core 23. Each of the plurality of convex walls 24 is formed so as to have a dovetail-shaped cross-section, so that each side surface forms a tapered surface 24a, 24a. A substantially dovetail-shaped permanent magnet mounting seat 25 extending in the circumferential direction is formed.

Each of the permanent magnet mounting seats 2 of the rotor core 23
5 has a structure in which a plurality (three in this embodiment, as shown in FIG. 3A) of permanent magnet pieces 27 are attached to form a rotor magnetic pole. Here, the permanent magnet piece 27 of the rotor 20 according to the present embodiment is composed of a pair of separated magnet plates 28 and 29, as shown in FIG. When attached to the seat 25, the respective abutting surfaces 28 a and 29 a have a shape in which they abut to form an integral permanent magnet piece 27, and are formed from a magnet plate material having a curved shape corresponding to the outer peripheral surface of the rotor core 23. ing. The butting surfaces 28a and 29 described above
“a” is a surface extending in a direction coinciding with the center line of the rotor shaft 22, and forms an opposing surface inclined by a predetermined angle from a radial surface perpendicular to the permanent magnet mounting seat 25 of the rotor core 23.

Further, the permanent magnet piece 27 has both ends 27b, 27c in the axial direction and both side faces 27a, 27a.
Are formed as tapered surfaces diverging from the upper surface side to the lower surface side complementary to the tapered surfaces 24a on both sides of the convex wall 24 of the rotor core 23 described above. A method of attaching and fixing the permanent magnet piece 27 composed of the pair of magnet plates 28 and 29 to the rotor core 23 will be described below.

First, as shown in FIG. 1, the magnet plate 28 of the pair of magnet plates 28, 29 forming the respective permanent magnet pieces 27 is substantially centrally located in the circumferential direction of a predetermined permanent magnet mounting seat 25 of the rotor core 23. The rotor core 23 is seated so as to be dropped from the outside in the radial direction. Next, the user slides on the seat surface of the mounting seat 25 and slides into one tapered side surface 24 a of the convex wall 24. As a result, the tapered side surface 27a on one side of the magnet plate 28 comes into close contact with and engages with the tapered surface 24a of the convex wall 24 complementarily.

Next, as shown in FIG. 1, another magnet plate 29 is attached so as to slide beside the butting surface 28a of the magnet plate 28. At this time, the butting surface 29a of the magnet plate 29 abuts with the mating butting surface 28a, and the tapered side surface 27a opposite to the butting surface 29a slides into the tapered side surface 24a of the convex wall 24 of the rotor core 23. Contact and engage. Thus,
The pair of magnet plates 28, 29 abutting on the butting surfaces 28 a, 29 a are attached to the permanent magnet mounting seat 2 of the rotor core 23.
5, and the tapered surfaces 24a, 27a on both sides of the permanent magnet piece 27 closely contact and engage with the tapered surfaces 24a, 24a of the convex wall 24 to form a mechanical lock structure. Even in the abutting area of the abutting surfaces 28a and 29a, both surfaces 28a and 29a are in close contact with each other on the opposed inclined surfaces .
You. Thus, due to the mechanical locking structure described above, the resultant force of the centrifugal force acting when the rotor rotates and the attractive force due to the magnetic interaction acting between the stator 10 is applied to each permanent magnet piece 27 by the rotor core 23. Even if it acts in the radial direction, the fear of peeling or detaching due to its acting force is mechanically prevented.

Of course, the lower surfaces of the pair of magnet plates 28 and 29 forming each permanent magnet piece 27, that is, the rotor core 2
Since an adhesive is applied to the surface that is seated on the outer peripheral surface of 3 and the seating surface, the permanent magnet is fixed by bonding.
FIGS. 3A and 3B both show the rotor 20 of the synchronous machine formed by firmly attaching a large number of permanent magnet pieces 27 to the rotor core 23 as described above and viewed from one end in the axial direction and the rotor 20. And an end face.

As is apparent from the first embodiment, according to the present invention, each permanent magnet piece 27 is separated into two magnet plates 28 and 29, and these magnet plates 28 and 29 are separated.
Are sequentially attached to the permanent magnet mounting seat 25 of the rotor core 23, so that unlike the conventional assembly method in which each permanent magnet piece is sequentially slid from the shaft end side of the rotor core 23 at the time of attachment, each permanent magnet piece 27 is attached to the same. The rotor manufacturing method is very advantageous in that it can be easily assembled in the immediate vicinity of the position and a mechanical lock structure can be obtained.

As described above, the feature that each permanent magnet piece 27 can be assembled near the predetermined mounting position on the permanent magnet mounting seat 25 of the rotor core 23 is, in particular,
It has been confirmed that it is even more advantageous when the rotor of the synchronous machine is formed in multiple stages in the axial direction and a predetermined offset angle is provided in the circumferential direction between each stage to reduce the torque ripple. it can. That is, as shown in FIG.
a is formed in a three-stage structure in the axial direction, and when a constant circumferential deviation angle θ1 is provided for each stage, each permanent magnet piece 27
The pair of magnet plates 28 and 29 are sequentially placed on the rotor core 23.
, The permanent magnet piece 27 is attached to the center permanent magnet mounting seat 25b of the mounting seats 25a, 25b of the respective stages forming the permanent magnet mounting seat 25 of the rotor core 23, Even when fixing, a pair of magnet plates 28, 29 is directly attached at the mounting position, not by a method of sliding from the shaft end of the rotor core 23.
It becomes possible to incorporate into. That is, as described above with reference to FIG. 10, assembling was conventionally impossible by providing the deviation angle θ1, but according to the present invention, such disadvantage can be completely avoided.

The permanent magnet mounting seats 25a to 25c at each stage of the rotor core 23 are formed by three convex partial walls 24a to 24 formed in the axial direction.
It is constituted by forming with c. FIG. 5 shows a third embodiment of the present invention. The rotor 20b of the synchronous machine according to the present embodiment has a rotor core 2
3 is a convex wall 34 extending generally axially so as to have a constant skew angle with respect to the center line of the rotor shaft 22.
Are provided on the outer peripheral surface at equal intervals in the circumferential direction. Therefore, the permanent magnet mounting seat 35 formed on the outer peripheral surface of the rotor core 23 also has the skew angle α. In addition, each convex wall 3
4 is that the permanent magnet mounting seat 35 formed between the convex walls 3 adjacent to each other is formed as a substantially dovetail-shaped concave seat. This is the same as the second embodiment.

As shown in FIG. 6, a plurality of permanent magnet pieces 37 mounted on the outer peripheral surface of the rotor core 23 are provided with a pair of magnet plates as in the first and second embodiments. 38, 39, but each permanent magnet piece 37 consisting of both magnet plates 38, 39 is attached to the permanent magnet mounting seat 35 having the skew angle α described above. Since they are mounted in this order, both side surfaces 37a, 37a are formed as divergent tapered side surfaces complementary to the tapered side surfaces of the convex wall of the rotor core 23, and at the same time, the rotor shaft is shown on a plan view corresponding to the skew angle α. It is different from the magnet plates 28 and 29 forming the permanent magnet pieces 27 of the first and second embodiments in that they are formed as side surfaces extending obliquely in the direction. The abutting surfaces 38a and 39a of the two magnet plates 38 and 39 are also surfaces which extend obliquely in the axial direction, and are also opposed to the abutting surfaces 28a and 29a of the above-described magnet plate in the radial direction of the rotor core 23. It is formed on the inclined facing surface in the same manner as described above.

Also in this embodiment, each of the permanent magnet pieces 37 is placed on the first magnet plate 38 of the pair of magnet plates 38, 39 first at a predetermined mounting seat 35 on the peripheral surface of the rotor core 23. The second embodiment is the same as the above-described embodiment in that an assembling step is employed in which the second magnet plate 39 is slid into the side of the former magnet plate 38, and the butting surfaces 38a, 39a are fitted together. It is. Then, at this time, the magnet plate 3
8 and 39, both side surfaces 37a, 37 of the permanent magnet piece 37
Needless to say, a closely contacts and engages with the tapered surface of the convex wall 34 of the mounting seat 35 to form a lock structure. Also,
Also in the third embodiment, each permanent magnet piece 37 is
The same applies to the case of fixing the outer peripheral surface of No. 3 with an adhesive.

The rotor 2 of the synchronous machine of the embodiment shown in FIG.
As described above, the simplification of the assembling process and the formation of the lock structure can exert the effect of preventing the permanent magnet pieces 37 from being separated and separated from each other, and at the same time, electrically, the permanent magnet pieces 3
7 are arranged with a skew angle α in the rotor axis direction, so that there is an effect of reducing the torque ripple generated due to the slot of the corresponding stator 10 by the skew of the rotor magnetic pole during the rotation operation. You can do it.

FIGS. 7 and 8 show a rotor 20c of a synchronous machine according to a fourth embodiment of the present invention. This embodiment is a rotor constituted by applying the permanent magnet piece 37 applied to the above-described third embodiment. The difference between this embodiment and the third embodiment is that the rotor is provided on the outer peripheral surface of the rotor core 23. A plurality of permanent magnet mounting seats 35 having a predetermined skew angle α and having a predetermined shift angle θ2 in the circumferential direction of the rotor 20c (3 in this example).
) Are formed by the permanent magnet mounting seats 35a to 35c.

However, also in the fourth embodiment, the pair of magnet plates 38 and 39 forming the permanent magnet piece 37 are
As in the embodiments described above, first, the first magnet plate 3
8 to a predetermined permanent magnet mounting seat 35a, 35b or 35c.
Then, the second magnet plate 39 slides beside the first magnet plate 38 so that the abutting surfaces 3
8a, 39a, and at this time, both side surfaces 37a, 37a of the integral permanent magnet piece 37 composed of the abutted magnet plates 38, 39 are convex walls forming the respective permanent magnet mounting seats 35a, 35b or 35c. The lock structure is formed by closely fitting and engaging with the tapered surface of the side surface of 34a, 34b or 34c. Therefore, as shown in FIG. 8, all the permanent magnet mounting seats 35a to 35
c, the permanent magnet pieces 37 can be mounted sequentially and extremely easily, and the mechanical lock structure is formed as described above. As a result, each of the permanent magnet pieces 3
Even if the combined force of the centrifugal force and the magnetic attraction force acts on 7, no separation or separation occurs.

The rotor 20 of the synchronous machine according to this embodiment
Since c has a deviation angle θ2 in the circumferential direction together with the skew angle α, the torque ripple reduction effect can be further enhanced.

[0025]

As is apparent from the description based on the above embodiments, according to the present invention, in forming a rotor having a surface-attached permanent magnet piece of a synchronous machine, a substantially cylindrical rotor core is used. A substantially dovetail-shaped concave permanent magnet mounting seat is formed on the surface of each of the surfaces, and each permanent magnet piece to be fitted and fixed in the concave permanent magnet mounting seat is joined to a pair of magnet plate members by a predetermined abutment. Firstly, the first member of the pair of magnet plate members is brought into close contact with and engaged with a tapered surface of a convex wall forming the concave permanent magnet mounting seat. Then, the second magnet plate member is slid into the abutting surface of the first magnet member to abut the opposing abutting surface, thereby enabling easy assembling and mechanical connection with the concave mounting seat of the rotor core. Because it forms a lock structure,
The rotor was configured to be able to sufficiently resist the separation and detachment acting forces acting on the permanent magnet pieces even when the combined force of the centrifugal force and the magnetic attraction force acting when the synchronous machine operates from the outside of the rotor. .

Further, according to this structure, even when the rotor is multi-staged in the axial direction to reduce the torque ripple, the first magnet plate member is attached from the outer peripheral side of the rotor core, and then the second magnet plate member is attached to the abutting surface. By sliding the abutting surface of the magnet plate member, the second magnet plate member can also be easily attached to the rotor core with a mechanically locked structure, thereby facilitating assembly and peeling. Both conditions of the separation prevention structure can be satisfied.

Accordingly, it has become possible to improve the life and operational reliability of the synchronous machine. Also, when the rotor is provided with its permanent magnet pieces in a skew arrangement or in an arrangement in which the phase angle is shifted in the circumferential direction for the effect of reducing the ripple torque, compared with the conventional rotor assembling method, The mounting of the permanent magnet piece of the present invention allows the assembly to be performed without any increase in the number of assembling steps, so that the method of manufacturing and assembling the rotor is rather simplified.

Although the present invention has been described with reference to the preferred embodiments, it is obvious to those skilled in the art that various modifications and alterations can be made within the scope of the technical concept of the present invention. No.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a rotor of a synchronous machine according to the present invention.

FIG. 2 is a perspective view showing a pair of magnet plates constituting a permanent magnet piece used in the rotor of the first embodiment in a separated state.

FIG. 3A is a front view of the rotor of the first embodiment. (B) is an end view along line 3-3 in (a).

FIG. 4 is a front view of a rotor for a synchronous machine according to a second embodiment of the present invention.

FIG. 5 is a front view of a third embodiment of a synchronous machine rotor according to the present invention.

FIG. 6 is a perspective view of a permanent magnet piece used for the rotor of the third embodiment.

FIG. 7 is a perspective view showing a fourth embodiment of the rotor of the synchronous machine according to the present invention.

FIG. 8 is a front view of the rotor of the fourth embodiment.

FIG. 9A is a front view showing an example of a pasted rotor of a conventional synchronous machine. (B) is the same side view.

FIG. 10A is a front view of another example of the pasted rotor of the conventional synchronous machine. (B) is a side view of yet another example of the pasted rotor of the conventional synchronous machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Stator 20, 20a-20c ... Rotor 22 ... Rotating shaft 23 ... Rotor core 24 ... Convex wall 24a ... Tapered side surface 25 ... Permanent magnet mounting seat 27 ... Permanent magnet piece 27a ... Tapered side surface 28 ... Magnet plate 28a ... Butt surface 29 … Magnet plate

Claims (7)

(57) [Claims] 1. A synchronous machine rotor having a plurality of permanent magnet pieces rotatably disposed on an inner periphery of a stator and attached and fixed to a surface of a substantially cylindrical rotor core, wherein the cylindrical rotor core is provided. Is provided at a predetermined interval in the circumferential direction on the outer peripheral surface thereof, has a length substantially in the rotation axis direction of the rotor, and has a plurality of convex walls having a dovetail cross-sectional shape. A plurality of dovetail-shaped recesses formed between adjacent ones of the plurality of convex walls are provided as concave mounting seats for the permanent magnet pieces, and each of the permanent magnets forming a magnetic pole of the rotor is provided. The magnet piece is formed of a pair of curved magnet plates that can be divided into two by abutment surfaces extending in the same direction as the rotation axis of the rotor, and is closely attached to and engaged with the dovetail-shaped concave mounting seat of the rotor core. Has divergent tapered surfaces on both sides that can form a lock structure And said abutting surface of the magnet plate of the pair, the rotor of the synchronous machine, characterized in that it has formed an inclined abutting surface having a predetermined inclination angle from a vertical radial plane with respect to the outer peripheral surface of the rotor core. 2. The plurality of substantially dovetail-shaped concave mounting seats of the rotor core each include a linear groove extending in the axial direction in parallel with the rotor rotation axis. 2. The synchronous machine rotor according to claim 1, wherein one or a plurality of sets of said permanent magnet pieces each comprising a pair of magnet plates are arranged. 3. The plurality of substantially dovetail-shaped concave mounting seats of the rotor core each include a plurality of partial straight grooves each having a predetermined length and extending in an axial direction parallel to the rotor rotation axis. The pair of magnet plates includes a non-linear groove continuously provided with a predetermined offset angle in the circumferential direction with respect to the rotor rotation shaft at the position, and the substantially dovetail-shaped concave mounting seat formed by the non-linear groove. 2. The synchronous machine rotor according to claim 1, wherein one or more sets of said permanent magnet pieces are provided. 4. The plurality of substantially dovetail-shaped concave mounting seats of the rotor core each comprise a straight groove extending in the axial direction with a predetermined inclination with respect to the rotor rotation shaft,
In the substantially dovetail-shaped concave mounting seat comprising the inclined straight groove,
2. The synchronous machine rotor according to claim 1, wherein one or a plurality of sets of the permanent magnet pieces each including the pair of magnet plates are provided. 3. 5. The plurality of substantially dovetail-shaped concave mounting seats of the rotor core, each of which has a predetermined inclination with respect to the rotor rotation axis and has a plurality of predetermined lengths extending in the axial direction. Consisting of non-linear grooves continuously provided with a predetermined deviation angle in the circumferential direction with respect to the rotor rotation axis at a plurality of positions,
2. The synchronous machine according to claim 1, wherein one or a plurality of sets of said permanent magnet pieces comprising said pair of magnet plates are disposed in said substantially dovetail-shaped concave mounting seat comprising said non-linear groove. Rotor. 6. An adhesive is applied between the lower surfaces of the pair of magnet plates forming the respective permanent magnet pieces and the bottom surface of the concave mounting seat of the rotor core, and on the abutting surfaces of the pair of magnet plates. And a hardened layer is provided.
The rotor of the synchronous machine according to any one of claims 5 to 5. 7. A method of manufacturing a surface-attached synchronous machine rotor in which a plurality of permanent magnet pieces are fixed to an outer peripheral surface of a substantially cylindrical rotor core, wherein the cylindrical rotor core has a circumferential surface. Are provided at predetermined intervals in the direction and have a length substantially in the direction of the rotation axis of the rotor, and are provided with a plurality of convex walls having a dovetail cross-sectional shape. A plurality of dovetail-shaped recesses are formed as concave mounting seats of the permanent magnet pieces between the convex walls, and each of the permanent magnet pieces forming the magnetic poles of the rotor is provided with a rotating shaft of the rotor. A divergent tapered surface consisting of a pair of curved magnet plates which can be divided into two by abutment surfaces extending in the same direction, and which can form a mechanical lock structure by being in close contact with and engaging with a dovetail-shaped concave mounting seat of the rotor core. On both sides, and the pair of magnet plates The abutment surface is formed to form an inclined abutment surface having a predetermined inclination angle from a radial surface perpendicular to the outer peripheral surface of the rotor core, and the permanent magnet pieces are attached to the concave mounting of the rotor core. At the time of attachment to the seat, the first magnet plate of the pair of magnet plates is slid in the circumferential direction toward one end of the dovetail-shaped concave mounting seat of the rotor core, and is tightly taperedly engaged. Then, the second magnet plate of the pair of magnet plates is brought into abutment with the first magnet plate, which is tapered into close contact with one end of the concave mounting seat of the rotor core, by the abutting surface. slide in the axial direction, engage, this time, at the same time the sides of the second magnet plates, adhesion to engaged tapered engagement to the other end side of the dovetail groove-shaped concave mounting seat of the rotor core, said permanent the magnet pieces Serial peeling against the rotor core, a rotor manufacturing method of a synchronous machine is characterized in that fixed to the outer peripheral surface of the rotor core as withdrawal is <br/> prevented.