JP2005160272A - Position control method of permanent magnet type rotating electric machine and permanent magnet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet type rotating electric machine capable of facilitating positioning when fixing a permanent magnet at a rotor iron core, and achieving an easy method for fixing the permanent magnet at the rotor iron core and excellent workability. <P>SOLUTION: A number of permanent magnets 3 which constitute poles become adjacent at a certain interval in a rotor iron core circumferential direction. The permanent magnets 3 are formed in such a shape that they run along an outer periphery surface 2a of the rotor iron core, and the width of a recess 3g in the rotor iron core circumferential direction of the permanent magnet side surface has larger irregularities than the width of a protrusion 3h. Besides, a magnet cover 4 has a roughly parallel shape with an external contour of the permanent magnet 3, an opening of which rotor iron core outer periphery 2a side is open is formed to cover the permanent magnet and to shield the whole portion, and the permanent magnet which is fitted in the magnet cover is fixed at the rotor iron core outer periphery surface 2a. The permanent magnet 3 and the magnet cover 4 form irregularities in the rotor iron core circumferential direction, therefore, it can be slid in the rotor iron core shaft direction with being fitted in the magnet cover 4 adjacent in the circumferential direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a permanent magnet type rotating electric machine, and more particularly to a permanent magnet fixing structure and a positioning method in a permanent magnet type rotating electric machine.

A permanent magnet type rotating electrical machine needs to fix a permanent magnet to a rotor core. In the inner rotor type permanent magnet type rotating electrical machine, the permanent magnet is covered with a magnet cover that is substantially similar to the outer shape of the permanent magnet in the rotor core and the outer surface of the rotor core is open. A permanent magnet is fixed to the outer peripheral surface of the rotor core together with the cover. Further, in the outer rotor type permanent magnet type rotating electrical machine, the permanent magnet is covered with a magnet cover that is substantially similar to the outer shape of the permanent magnet on the rotor core and that is open on the inner peripheral surface side of the rotor core. The permanent magnet is fixed to the inner peripheral surface of the rotor core together with the magnet cover.
In the inner rotor type permanent magnet type rotating electrical machine and the outer rotor type permanent magnet type rotating electrical machine described above, a method of fixing the permanent magnet to the rotor core is known as in Patent Document 1.
The thing of this literature is
(1) When a permanent magnet is fitted from the magnet cover opening, an adhesive is applied to a portion where the magnet cover and the permanent magnet are in contact to bond the permanent magnet to the magnet cover. Thereafter, the permanent magnet bonded together with the magnet cover is fixed to the rotor core while being positioned in the circumferential direction of the rotor core.
(2) The permanent magnet fitted together with the magnet cover is fixed to the rotor core while the permanent magnet is positioned in the circumferential direction of the rotor core in a state where the permanent magnet is not fitted and fixed to the magnet cover opening. .
Japanese Patent Laid-Open No. 2003-32929

Although the thing of the said patent document 1 can prevent scattering of a permanent magnet, and the fixing structure of a permanent magnet is simple and has the advantage which was excellent in assembly workability | operativity, there exist the following problems.
(1) In the method in which the permanent magnet is fitted and adhered to the magnet cover and then fixed while being positioned in the circumferential direction of the rotor core, before the permanent magnet is fixed to the rotor core, the portion where the magnet cover and the permanent magnet are in contact with each other in advance. It is necessary to apply an adhesive or bond the magnet cover and the permanent magnet after applying the adhesive, and there are many work steps when fixing the permanent magnet to the rotor core.
(2) In the method of fixing the permanent magnet while positioning it in the circumferential direction of the rotor core without fitting the magnet to the magnet cover, the position of the permanent magnet is confirmed and the permanent magnet does not fall off the magnet cover. Therefore, it is necessary to fix the permanent magnet to the rotor core with care, and it is not easy to fix the permanent magnet to the rotor core. Also, by adopting a high magnetic force magnet for the purpose of improving the performance of the permanent magnet type rotating electrical machine, when the permanent magnet is dropped from the magnet cover, it sticks to the rotor core or other permanent magnets adjacent in the circumferential direction However, it is not easy to move or peel the permanent magnet, and the rotor core or the permanent magnet may be damaged or damaged.

  The present invention has been made in view of the above circumstances, and the method of fixing the permanent magnet of the permanent magnet type rotating electric machine to the rotor core is simple, more workable, and when fixing the permanent magnet to the rotor core. It is an object of the present invention to provide a permanent magnet type rotating electric machine and a method for positioning a permanent magnet that can be easily positioned.

  The permanent magnet type rotating electrical machine of the first invention that solves the above-mentioned problems is uneven in the circumferential direction of the rotor core on the side of the permanent magnet of the inner rotor type permanent magnet type rotating electrical machine in which the permanent magnet is disposed on the outer peripheral surface of the rotor core. The outer surface of the rotor core is covered with a magnet cover that is substantially similar to the outer shape of the permanent magnet and covers the entire permanent magnet, and in the rotor core circumferential direction of the permanent magnet side surface and the magnet cover side surface, The width of the concave portion is wider than the width of the convex portion, and the structure is characterized in that it is fitted with a magnet cover adjacent in the circumferential direction.

  The permanent magnet type rotating electrical machine according to the second aspect of the present invention forms irregularities in the circumferential direction of the rotor core on the side of the permanent magnet of the outer rotor type permanent magnet type rotating electrical machine in which the permanent magnet is disposed on the inner peripheral surface of the rotor core. Cover the permanent magnet with a magnet cover that is almost similar to the outer shape of the rotor and has an opening on the inner peripheral surface side of the rotor core, covering the entire permanent magnet, and the width of the recess in the circumferential direction of the rotor core on the side of the permanent magnet and the side of the magnet cover Is wider than the width of the convex part and is characterized by a structure fitted with a magnet cover adjacent in the circumferential direction.

  The permanent magnet type rotating electrical machine according to the third aspect of the present invention is provided in the rotor core circumferential direction on the side of the permanent magnet of the inner rotor type or outer rotor type permanent magnet type rotating electrical machine in which the permanent magnet is disposed on the outer peripheral surface or inner peripheral surface of the rotor core. Cover the entire permanent magnet with a magnet cover that is uneven and has a shape that is almost similar to the outer shape of the permanent magnet and that is open on the outer peripheral surface or inner peripheral surface of the rotor core. In the circumferential direction of the rotor core, the width of the concave portion is wider than the width of the convex portion, and it fits with the magnet cover adjacent in the circumferential direction. The magnet cover is removed from the permanent magnet after being fixed to the surface.

  According to a fourth aspect of the present invention, there is provided a permanent magnet type rotating electrical machine in which irregularities are formed in the circumferential direction of the rotor core on the side of the permanent magnet of the inner rotor type permanent magnet type rotating electrical machine having a permanent magnet disposed on the outer peripheral surface of the rotor core. Cover the permanent magnet with a magnet cover that is almost similar to the outer shape and is open on the outer surface of the rotor core, covering the entire permanent magnet, and the width of the concave portion is convex in the circumferential direction of the rotor core on the side of the permanent magnet and the side of the magnet cover. The permanent magnet and magnet cover are slidable in the axial direction of the rotor core while being fitted to the magnet cover adjacent in the circumferential direction. When fixed to the outer peripheral surface, positioning is easy.

  According to a fifth aspect of the present invention, there is provided a permanent magnet type rotating electrical machine in which irregularities are formed in the circumferential direction of the rotor core on the side of the permanent magnet of the outer rotor type permanent magnet type rotating electrical machine having a permanent magnet disposed on the inner peripheral surface of the rotor core. Cover the permanent magnet with a magnet cover that is almost similar to the outer shape of the rotor and has an opening on the inner peripheral surface side of the rotor core, covering the entire permanent magnet, and the width of the recess in the circumferential direction of the rotor core on the side of the permanent magnet and the side of the magnet cover Is wider than the width of the convex part, and the permanent magnet and magnet cover can be slid in the direction of the rotor core axis while being fitted to the magnet cover adjacent in the circumferential direction, and the permanent magnet fitted to the magnet cover is further rotated. When fixed to the inner peripheral surface of the core, the positioning is easy.

  As described above, according to the permanent magnet type rotating electrical machine of the present invention, the concave and convex portions are formed in the circumferential direction of the rotor core on the side surface of the permanent magnet and the side surface of the magnet cover, and the width of the concave portion is larger than the width of the convex portion. Since the permanent magnet and the magnet cover can slide in the rotor core axial direction while being fitted to the magnet cover that is widely adjacent in the circumferential direction, positioning in the circumferential direction of the rotor core when fixing the permanent magnet to the rotor core The permanent magnet can be fixed to the rotor core while reducing the falling off of the permanent magnet without bonding the permanent magnet and the magnet cover. Accordingly, it is possible to prevent the rotor iron core and the permanent magnet from being damaged or damaged.

Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1> FIG. 1A is a side view of a rotor of a permanent magnet type rotating electrical machine according to Embodiment 1 of the present invention (a view seen from the axial direction of the rotor core), and FIG. FIG. 1A is a view taken in the direction of the arrow A in FIG. 1A showing a magnet cover and a permanent magnet provided in the permanent magnet type rotating electrical machine of FIG. 1A, and FIG. 1C is the permanent magnet type rotating electrical machine of FIG. It is a B direction arrow directional view of Fig.1 (a) which shows the magnet cover and permanent magnet with which it was equipped. FIG. 2 is an explanatory view showing a procedure for attaching the magnet cover and the permanent magnet to the rotor core. FIG. 3A is a C direction view showing a state in which the magnet cover is fixed to the rotor core when the magnet covers fitted with permanent magnets are adjacent to each other. FIG.3 (b) is a D direction arrow view which shows the state slid to the rotor core axial direction from the state of Fig.3 (a).

  The permanent magnet type rotating electrical machine shown in FIG. 1 is of an inner rotor type, and the rotor 1 is provided inside a stator (not shown). On the outer peripheral surface 2a of the rotor core 2, a large number of permanent magnets 3 constituting magnetic poles are arranged adjacent to each other in the circumferential direction of the rotor core. The permanent magnet 3 is formed in an arc shape along the rotor core outer peripheral surface 2a, and an arbitrary number of uneven portions are formed in the rotor core circumferential direction on the side surface of the permanent magnet 3. The concave portions 3g of the concave and convex portions are formed with a width wider than the width of the convex portions 3h, and the magnet covers 4 are covered with the permanent magnets 3 respectively.

  The magnet cover 4 has a substantially similar shape along the outer shape of the permanent magnet 3, and is provided with a recessed portion 4g and a projected portion 4h on the side surface in the circumferential direction of the rotor core, and an opening for attachment in which the outer side of the rotor core is open. 4a is formed. The side concave portion 4g and the side convex portion 4h of the magnet cover 4 adjacent in the circumferential direction are fitted, and these concave and convex portions are wider than the convex portion 4h in the width of the side concave portion 4h, and the magnet cover adjacent in the circumferential direction. Are slidable in the direction of the rotor core axis (FIGS. 3A and 3B). Alternatively, only the permanent magnet may be temporarily attached to the rotor core first, and then the permanent magnet may be covered with a magnet cover, and then the permanent magnet may be positioned and fixed while sliding along with the magnet cover. In the rotor core axis direction of the magnet cover 4, two first protrusions 4b are provided on one side surface 4f. These two first protrusions 4b are formed in a substantially semi-cylindrical shape, and are located at both ends of the magnet cover 4 in the circumferential direction of the rotor core. Further, in the rotor core axial direction of the magnet cover 4, the other side surface 4c has an extension portion 4e extending along the rotor core radial direction on the other side surface 4c, and 2 on the inner surface of the extension portion 4e. Two second protrusions 4d are provided. These second protrusions 4d are also formed in a substantially semi-cylindrical shape, and are located at both ends of the magnet cover 4 in the circumferential direction of the rotor core.

  On the other hand, the outer diameter of one axial end 2f of the rotor core 2 is larger than the outer diameter of the other portion of the rotor core, and the first fitting is performed on the inner end face 2f-1 of the axial end 2f. A hole 2b is provided (see FIG. 2). Moreover, the 2nd fitting hole 2d is provided in the other axial direction end surface 2c of the rotor core 2 (refer FIG. 2). Further, the first fitting hole 2b and the second fitting hole 2d are located between the permanent magnets 3 adjacent to each other in the circumferential direction of the rotor core.

  The first protrusion 4b of the magnet cover 4 is fitted into the first fitting hole 2b of the rotor core 2, and the second protrusion 4d of the magnet cover 4 is fitted into the second fitting hole 2d of the rotor core 2. Mating. At this time, in the magnet cover 4 adjacent in the circumferential direction, the first protrusion 4b and the second protrusion 4d are respectively fitted in the first fitting hole 2b and the second fitting hole 2d. The first fitting hole 2b and the second fitting hole 2d are shared. 1 (b) and 1 (c) show the two adjacent magnet covers 4 opened for convenience of explanation.

  The procedure for attaching the magnet cover 4 and the permanent magnet 3 will be described with reference to FIG. 2. First, as shown in FIG. 2 (a), the permanent magnet 3 is fitted into the magnet cover 4, and the magnet cover 4 is attached in this state. Slide along the outer peripheral surface of the rotor core 2 in the axial direction. Then, as shown in FIG. 2B, the first protrusion 4b of the magnet cover 4 is fitted into the first fitting hole 2b of the rotor core 2, and further, as shown in FIG. The second protrusion 4d is pushed into the second fitting hole 2d of the rotor core 2 like a button and fitted.

  As a result, the permanent magnet 3 is fixed to the rotor core 2 together with the magnet cover 4 as shown in FIG. At this time, the permanent magnet 3 is fitted into a recess 2e formed on the outer peripheral surface of the rotor core 2 so that the position in the rotor core axis direction is regulated.

  Therefore, according to the permanent magnet type rotating electrical machine of the first embodiment, in addition to the same effects as those of the fifth embodiment of Japanese Patent Application Laid-Open No. 2003-32929 of the prior patent application, the following effects are obtained. It is done.

  According to the magnet cover 4 of the first embodiment, the positioning in the circumferential direction of the rotor core can be easily performed by the side concave portion 4g and the convex portion 4h, so that the pre-treatment process can be performed in addition to the permanent magnet being fitted to the magnet cover. There is no need, and it is possible to realize fixing of the rotor core of the permanent magnet with reduced dropping of the permanent magnet.

Of course, as a permanent magnet type rotating electrical machine, when the magnet cover is not required, the magnet cover may be removed and used. Even in such a case, it is possible to easily position the permanent magnet and to reduce the drop of the permanent magnet.
<Embodiment 2> FIG. 4 (a) is a side view of a rotor of a permanent magnet type rotating electrical machine according to Embodiment 2 of the present invention (view from the axial direction of the rotor core), and FIG. 4 (b) is a diagram. FIG. 4A is a view taken in the direction of the arrow E in FIG. 4A showing the magnet cover and the permanent magnet provided in the permanent magnet type rotating electric machine of FIG. 4A, and FIG. 4C is the permanent magnet type rotating electric machine of FIG. It is a F direction arrow directional view of Fig.4 (a) which shows the magnet cover and permanent magnet with which it was equipped. FIG. 5 is an explanatory view showing a procedure for attaching the magnet cover and the permanent magnet to the rotor core. FIG. 6A is a view in the G direction showing a state where the magnet cover is fixed to the rotor core when the magnet covers fitted with permanent magnets are adjacent to each other. FIG. 6B is an H direction arrow view showing a state of sliding from the state of FIG. 6A in the rotor core axis direction.

  The permanent magnet type rotating electrical machine shown in FIG. 4 is of an outer rotor type, and the rotor 11 is provided outside a stator (not shown). On the inner peripheral surface 12a of the rotor core 12, a large number of permanent magnets 13 constituting magnetic poles are arranged close to each other in the circumferential direction of the rotor core. The permanent magnet 13 has an arc shape along the rotor core inner peripheral surface 12a, and an arbitrary number of uneven portions are formed on the side of the permanent magnet 13 in the rotor core circumferential direction. The concave portion 13g of the concave-convex portion is formed with a width wider than the width of the convex portion 13h, and the permanent magnet 13 is covered with a magnet cover 14, respectively.

  The magnet cover 14 has a substantially similar shape along the outer shape of the permanent magnet 13, and a recess 14 g and a protrusion 14 h are formed on the side surface in the circumferential direction of the rotor core, and the opening for mounting the rotor core inner circumferential surface is open. A portion 14a is formed. The convex portions 14h of the magnet cover 14 adjacent to the side concave portion 14g in the circumferential direction are fitted, and these concave and convex portions are wider than the convex portion 14h in the width of the side concave portion 14g, and the magnet cover adjacent in the circumferential direction It has a structure that can be slid in the rotor core axis direction in a fitted state (FIGS. 6A and 6B). Alternatively, only the permanent magnet may be temporarily attached to the rotor core first, and then the permanent magnet may be covered with a magnet cover, and then the permanent magnet may be positioned and fixed while sliding along with the magnet cover. In the direction of the rotor core of the magnet cover 14, two first protrusions 14b are provided on one side surface 14f. These two first protrusions 14b are formed in a substantially semi-cylindrical shape, and are located at both ends of the magnet cover 14 in the circumferential direction of the rotor core. Further, in the rotor core axis direction of the magnet cover 14, the other side surface 14c has an extension portion 14e extending on the opening side along the rotor core radial direction, and 2 on the inner surface of the extension portion 14e. Two second protrusions 14d are provided. These second protrusions 14d are also formed in a substantially semi-cylindrical shape, and are located at both ends of the magnet cover 14 in the circumferential direction of the rotor core.

  On the other hand, in the rotor core 12, the inner diameter of one axial end portion 12f is smaller than the inner diameter of the other portion of the rotor core 12, and the first fitting hole 12b is formed in the inner end face 12f-1 of the axial end portion 12f. Is provided (see FIG. 5). A second fitting hole 12d is provided on the other axial end surface 12c of the rotor core 12 (see FIG. 5). Further, the first fitting hole 12b and the second fitting hole 12d are located between the permanent magnets 13 adjacent to each other in the circumferential direction of the rotor core.

  The first protrusion 14 b of the magnet cover 14 is fitted into the first fitting hole 12 b of the rotor core 12, and the second protrusion 14 d of the magnet cover 14 is fitted into the second fitting hole 12 d of the rotor core 12. Mating. At this time, in the magnet cover 14 adjacent in the circumferential direction, each of the first protrusions 14b and the second protrusions 14d is fitted in the first fitting hole 12b and the second fitting hole 12d, respectively. The first fitting hole 12b and the second fitting hole 12d are shared. 4B and 4C show the two adjacent magnet covers 14 opened for convenience of explanation.

  The procedure for attaching the magnet cover 14 and the permanent magnet 13 will be described with reference to FIG. 5. First, the permanent magnet 13 is fitted into the magnet cover 14 as shown in FIG. The rotor core 12 is slid in the axial direction along the inner peripheral surface. Then, the first protrusion 14b of the magnet cover 14 is fitted into the first fitting hole 12b of the rotor core 12 as shown in FIG. 5 (b), and further the magnet cover 14 is shown in FIG. 5 (c). The second protrusion 14d is fitted into the second fitting hole 12d of the rotor core 12 by pushing it like a button.

  As a result, the permanent magnet 13 is fixed to the rotor core 12 together with the magnet cover 14 as shown in FIG. At this time, the permanent magnet 13 is fitted into a recess 12e formed on the inner peripheral surface of the rotor core 12, so that the position in the rotor core axial direction is regulated.

  Therefore, according to the permanent magnet type rotating electrical machine of the second embodiment, in addition to the same effects as those of the eleventh embodiment of Japanese Patent Application Laid-Open No. 2003-32929 of the prior patent application, the following effects are obtained. It is done.

  According to the magnet cover 14 of the second embodiment, positioning in the circumferential direction of the rotor core can be easily performed by the side concave portions 14g and the convex portions 14h, so that the pre-processing step can be performed in addition to fitting the permanent magnet to the magnet cover. There is no need, and it is possible to realize fixing of the rotor core of the permanent magnet with reduced dropping of the permanent magnet.

  Of course, as a permanent magnet type rotating electrical machine, when the magnet cover is not required, the magnet cover may be removed and used. Even in such a case, it is possible to easily position the permanent magnet and to reduce the drop of the permanent magnet.

BRIEF DESCRIPTION OF THE DRAWINGS It is a fragmentary figure of the rotor of the permanent magnet type rotary electric machine concerning Embodiment 1 of this invention, (a) is sectional drawing, (b) is an A direction arrow view, (c) is a B direction arrow view. Explanatory drawing which shows the attachment procedure of a magnet cover and a permanent magnet. (A) is a C direction arrow view which shows the state which fixed the adjacent magnet cover and the permanent magnet to the rotor core, (b) is a D direction arrow view which shows the state made to slide. It is a fragmentary figure of the rotor of the permanent magnet type rotary electric machine concerning Embodiment 2 of this invention, (a) is sectional drawing, (b) is E direction arrow view, (c) is F direction arrow view. Explanatory drawing which shows the attachment procedure of a magnet cover and a permanent magnet. (A) G direction arrow view which shows the state which fixed the adjacent magnet cover and the permanent magnet to the rotor core, (b) is H direction arrow view which shows the state made to slide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rotor 2 ... Rotor core 2a ... Rotor core outer peripheral surface 2b ... 1st fitting hole 2c ... Rotor core end surface 2d ... 2nd fitting hole 2e ··· Concavity portion 2f ··· Axial end portion 2f-1 ··· End face 3 ··· Permanent magnet 3g ··· Permanent magnet side surface recess portion 3h ··· Permanent magnet side surface protrusion portion 4 ··· Magnet cover 4a ·· Opening 4b ... 1st projection 4c ... Magnet cover side 4d ... 2nd projection 4e ... Extension 4f ... Magnet cover side 4g ... Magnet cover side recess 4h .. convex portion on magnet side surface 11 ... rotor 12 ... rotor core 12a ... rotor core inner peripheral surface 12b ... first fitting hole 12c ... rotor core end surface 12d ... -2nd fitting hole 12e ... recessed part 12f ... axial direction edge part 12f- ... End face 13 ... Permanent magnet 13g ... Permanent magnet side recess 13h ... Permanent magnet side protrusion 14 ... Magnet cover 14a ... Opening 14b ... First protrusion 14c ...・ Magnet cover side surface 14d ... second protrusion 14e ... extension portion 14f ... magnet cover side surface 14g ... magnet cover side recess 14h ... magnet cover side projection

Claims (5)

In the inner rotor type permanent magnet type rotating electrical machine in which a plurality of permanent magnets are arranged adjacent to each other in the circumferential direction of the outer surface of the rotor core,
Concave and convex portions are formed on the side surfaces of the permanent magnets arranged on the rotor core, and the width of the concave portions of the concave and convex portions is formed wider than the width of the convex portions, and is substantially similar to the outer shape of the permanent magnet. The magnet cover is formed on the rotor core, and the permanent magnet is covered with the magnet cover to cover the permanent magnet, and the concave and convex portions are fitted to each other between the adjacent permanent magnets. A permanent magnet type rotating electrical machine. In the outer rotor type permanent magnet rotating electrical machine in which a plurality of permanent magnets are arranged adjacent to each other in the circumferential direction of the inner surface of the rotor core,
Concave and convex portions are formed on the side surfaces of the permanent magnets arranged on the rotor core, and the width of the concave portions of the concave and convex portions is formed wider than the width of the convex portions, and is substantially similar to the outer shape of the permanent magnet. The magnet cover is formed on the rotor core, and the permanent magnet is covered with the magnet cover to cover the permanent magnet, and the concave and convex portions are fitted to each other between the adjacent permanent magnets. A permanent magnet type rotating electrical machine. In the inner rotor type permanent magnet type rotating electrical machine or the outer rotor type permanent magnet type rotating electrical machine according to claim 1 or 2,
Concave and convex portions are formed on the side surfaces of the permanent magnets arranged on the rotor core, and the width of the concave portions of the concave and convex portions is formed wider than the width of the convex portions, and is substantially similar to the outer shape of the permanent magnet. The magnet cover is formed on the rotor core, and the permanent magnet is covered with the magnet cover to cover the permanent magnet, and the concave and convex portions are fitted to each other between the adjacent permanent magnets. In addition, the permanent magnet type rotating electrical machine is characterized in that after the permanent magnet fitted to the magnet cover is fixed to the outer peripheral surface or inner peripheral surface of the rotor core, the magnet cover can be removed from the permanent magnet. In the inner rotor type permanent magnet type rotating electrical machine in which a plurality of permanent magnets are arranged adjacent to each other in the circumferential direction of the outer surface of the rotor core,
Concave and convex portions are formed on the side surfaces of the permanent magnets arranged on the rotor core, and the width of the concave portions of the concave and convex portions is formed wider than the width of the convex portions, and is substantially similar to the outer shape of the permanent magnet. The magnet cover is formed on the rotor core, and the permanent magnet is covered with the magnet cover to cover the permanent magnet, and the concave and convex portions are fitted to each other between the adjacent permanent magnets. A permanent magnet positioning method for a permanent magnet type rotating electrical machine, wherein the permanent magnet fitted to the magnet cover is slidable in the axial direction of the rotor core when the permanent magnet is fixed to the outer peripheral surface of the rotor core. In the outer rotor type permanent magnet rotating electrical machine in which a plurality of permanent magnets are arranged adjacent to each other in the circumferential direction of the inner surface of the rotor core,
Concave and convex portions are formed on the side surfaces of the permanent magnets arranged on the rotor core, and the width of the concave portions of the concave and convex portions is formed wider than the width of the convex portions, and is substantially similar to the outer shape of the permanent magnet. The magnet cover is formed on the rotor core, and the permanent magnet is covered with the magnet cover to cover the permanent magnet, and the concave and convex portions are fitted to each other between the adjacent permanent magnets. A permanent magnet positioning method for a permanent magnet type rotating electrical machine, characterized in that when the permanent magnet fitted to the magnet cover is fixed to the inner peripheral surface of the rotor core, it can be slid in the axial direction of the rotor core.

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