JP2013121263A - Rotor of rotary electric machine and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet-embedded synchronous motor that has enhanced torque density and reduced cogging.SOLUTION: A rotor 1 of a rotary electric machine comprises: a rotor shaft 3 as the center of rotation; and an approximately cylindrical rotor core 5 that is provided on an outer side of the rotor shaft 3. On an outer edge thereof, the rotor core 5 has eight permanent magnet members 11 that are disposed at regular intervals in a circumferential direction of the rotor core 5 and extend in an axial direction of the rotor shaft 3. The rotor core 5 is formed by laminating approximately annular magnetic steel sheets 15 in the axial direction of the rotor shaft 3. The rotor 1 also includes a ring bonded magnet member 7 that covers an outer circumferential surface of the rotor core 5 and that includes permanent magnet powder and resin material. The bonded magnet member 7 is anisotropically magnetized in such a manner that poles of the bond magnet member 7 face respective poles, having the same polarity, of the permanent magnet members 11.

Description

  The present invention relates to a rotor of a rotating electrical machine, and more particularly to a rotor of an embedded magnet type synchronous motor and a manufacturing method thereof.

  Conventionally, an embedded magnet type synchronous motor (IPMSM) is used for a motor for driving an automobile, a motor for driving a pump, a motor for driving a power steering, and a motor for driving home appliances such as a refrigerator, a washing machine, and a dryer. Therefore, higher output and higher efficiency are demanded.

  In such a situation, it is easy to control the magnetization direction, which is an advantage of the so-called bonded magnet, in which permanent magnet powder is dispersed in the resin, high degree of freedom in shape molding, and ease of integral molding with other members. Attempts have been made to improve the performance of conventional embedded magnet type synchronous motors.

  For example, Patent Document 1 describes that a dust core and a magnet are simultaneously compression-molded with a rotor composed of a dust core and a magnet. Specifically, in the invention described in Patent Document 1, a rotor core of a motor is formed by molding a powder material, and the molded body is composed of a bond magnet portion mainly composed of a binder and magnet powder, a binder and a soft material. This is a permanent magnet type rotor that has a soft magnetic part mainly composed of magnetic powder and is formed by using compression molding means, and is intended to realize low cogging and high output.

  Moreover, although it is not the type which embeds a permanent magnet in an iron core, in patent document 2, in the magnet rotor for motors of a surface magnet type, a magnet is skewed in a helical shape to achieve low cogging and different polarities. It is disclosed that an iron core is provided between the magnets so that reluctance torque can be generated.

JP 2006-320036 A JP 2006-180677 A

  By the way, in the current embedded magnet type synchronous motor, between the magnets embedded in the rotor core, it does not contribute to torque generation such as a short-circuit magnetic flux or a magnetic flux component that does not interlink with the stator winding (a magnetic path is completed in the rotor). Since the magnetic flux component is generated, the magnetic flux of the embedded magnet cannot be effectively used. For this reason, it is required to improve the torque density by reducing the magnetic flux component that does not contribute to the torque generation.

  On the other hand, the interior magnet type synchronous motor is also required to reduce vibration and noise by reducing cogging. However, in Patent Documents 1 and 2, although cogging can be reduced, there is no disclosure about reducing a magnetic flux component that does not contribute to torque generation. Therefore, torque density by reducing the magnetic flux component is not disclosed. It cannot be an effective means for simultaneously achieving improvement and low cogging.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a technology that achieves both improvement in torque density and low cogging in a rotor of an embedded magnet type synchronous motor. is there.

  In order to achieve the above object, the rotor of the rotating electrical machine according to the present invention has a function of rectifying the magnetic flux of the embedded magnet and a function of suppressing a steep change in the air gap magnetic flux density between the rotor and the stator. The outer peripheral surface of the rotor core is covered with a ring-shaped bonded magnet member.

  Specifically, the first invention includes a rotation shaft member serving as a rotation center, and a substantially cylindrical rotor core provided outside the rotation shaft member, and the rotation shaft member is disposed on an outer peripheral portion of the rotor core. A rotor of a rotating electrical machine in which a plurality of permanent magnet members extending in the axial direction of the rotor core are disposed at substantially equal intervals in the circumferential direction of the rotor core.

  The rotor core is formed by laminating substantially annular magnetic steel plates in the axial direction of the rotary shaft member, and a ring-shaped bond magnet including a permanent magnet powder and a resin material covering the outer peripheral surface of the rotor core. The bonded magnet member is characterized in that the pole of the bonded magnet member is poled anisotropically so that the same pole as the pole of the permanent magnet member is opposed. .

  According to the first aspect of the present invention, since the pole magnet is magnetized anisotropically so that its pole is opposite to the pole of the permanent magnet member so as to cover the outer peripheral surface of the rotor core. Since the bond magnet member plays a role of rectifying the magnetic flux of the permanent magnet member (embedded magnet) to the stator side, increase the effective flux linkage component (reduce the flux component that does not contribute to torque generation) Torque density can be improved.

  Further, by covering the outer peripheral surface of the rotor core with the polar magnetized bonded magnet member, a sinusoidal magnetic flux density waveform is obtained on the outer peripheral surface of the rotor core, so that the cogging torque can be reduced.

  As a result, in the rotor of the embedded magnet type synchronous motor, it is possible to achieve both improvement in torque density and reduction in cogging.

  The second invention is characterized in that the bonded magnet member has the same number of poles as the permanent magnet member.

  According to the second invention, the magnetic flux of the permanent magnet member can be efficiently rectified to the stator side, and the effective flux linkage component can be further increased.

  3rd invention is equipped with the rotating shaft member used as the rotation center, and the substantially cylindrical rotor core provided in the outer side of the said rotating shaft member, and extends in the axial direction of the said rotating shaft member in the outer peripheral part of the said rotor core. The present invention is directed to a method for manufacturing a rotor of a rotating electrical machine in which a plurality of permanent magnet members are arranged at substantially equal intervals in the circumferential direction of the rotor core.

  Then, a substantially annular magnetic steel plate having a plurality of openings through which the permanent magnet member can be inserted is laminated and integrated on the outer peripheral portion so that the openings are continuous in the axial direction of the rotary shaft member, thereby forming the rotor core. A rotor core forming step, a compounding step of mixing the permanent magnet powder and the resin material into a compound, an installation step of installing the rotor core in a cavity formed in a mold, and the opening facing the radial direction In this way, the compounded material is injected into the cavity surrounding the outer periphery of the rotor core while applying an orientation magnetic field so as to form a plurality of poles from the orientation magnet arranged outside the mold as described above. A magnetic field orientation injection step of molding a ring-shaped bonded magnet member so as to cover the outer peripheral surface of the rotor core, and releasing the rotor core and the bonded magnet member from the mold. Thereafter, a magnetizing step of applying anisotropic anisotropic magnetization to the permanent magnet powder contained in the bond magnet member, and inserting and fixing the rotary shaft member through the rotor core, and fixing the permanent magnet member to the rotor core And an insertion fixing step of inserting and fixing through the opening.

  According to the third aspect of the invention, it is possible to easily manufacture an embedded magnet type synchronous motor that can achieve both improvement in torque density and reduction in cogging.

  4th invention is equipped with the rotating shaft member used as the rotation center, and the substantially cylindrical rotor core provided in the outer side of the said rotating shaft member, and extends in the axial direction of the said rotating shaft member in the outer peripheral part of the said rotor core. The present invention is directed to a method for manufacturing a rotor of a rotating electrical machine in which a plurality of permanent magnet members are arranged at substantially equal intervals in the circumferential direction of the rotor core.

  Then, on the outer periphery, a substantially annular magnetic steel plate having a plurality of openings through which the permanent magnet member can be inserted is laminated and integrated so that the openings are continuous in the axial direction of the rotary shaft member, and the permanent core A bonded magnet member containing magnet powder and a resin material, and wherein the permanent magnet powder is poled anisotropically, and a pole of the bonded magnet member and a pole of the permanent magnet member A joining step of joining the outer peripheral surface of the rotor core and the inner peripheral surface of the bonded magnet member so that the same poles face each other, and inserting and fixing the rotary shaft member through the rotor core, and fixing the permanent magnet member An insertion and fixing step of inserting and fixing the rotor core through the opening.

  According to the fourth aspect of the invention, it is possible to more easily manufacture an embedded magnet type synchronous motor that can achieve both improvement in torque density and reduction in cogging.

  According to the rotor of the rotating electrical machine according to the present invention, the bond magnet member that is anisotropically polarized so that the pole thereof is opposite to the pole of the permanent magnet member is provided so as to cover the outer peripheral surface of the rotor core. Therefore, the bonded magnet member rectifies the magnetic flux of the permanent magnet member to the stator side, thereby reducing the magnetic flux component that does not contribute to torque generation and improving the torque density, and at the interface between the magnetic poles. Since a sinusoidal magnetic flux density waveform is obtained, the cogging torque can be reduced. Therefore, in the rotor of the embedded magnet type synchronous motor, it is possible to achieve both improvement in torque density and reduction in cogging.

  Further, according to the method for manufacturing a rotor of a rotating electrical machine according to the present invention, it is possible to manufacture a rotor of an embedded magnet type synchronous motor that achieves both improved torque density and low cogging by a simple method.

It is a perspective view which shows the rotor of the rotary electric machine which concerns on embodiment of this invention. It is an arrow line view of the II-II line | wire of FIG. It is the elements on larger scale of the A section of FIG. It is a figure which shows typically the leakage magnetic flux of the permanent magnet member embedded in the rotor core, The figure (a) is a figure which shows the case where the bond magnet member is not provided, The figure (b) is a bond magnet. It is a figure which shows the case where a member is provided. It is a figure showing the magnetic flux density waveform in a rotor core outer peripheral surface when taking a rotation angle on a horizontal axis and taking a magnetic flux density on a vertical axis | shaft. It is a flowchart of the manufacturing method of the rotor of a rotary electric machine. It is sectional drawing which shows a metal mold | die and the rotor core arrange | positioned at this. It is a schematic diagram explaining magnetic field orientation injection molding. It is a flowchart of the manufacturing method of the rotor of a rotary electric machine. It is a schematic diagram explaining magnetic field orientation injection molding. It is a figure which illustrates a joining process typically.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
-Rotor structure-
FIG. 1 is a perspective view showing a rotor of a rotating electrical machine according to the present embodiment, and FIG. 2 is a view taken along the line II-II in FIG. The rotor 1 is preferably used for a relatively low output motor of 2 kW or less, such as a pump driving motor, a power steering driving motor, and a household appliance driving motor in a vehicle. As shown, a metal rotor shaft (rotary shaft member) 3 serving as a rotation center, a substantially cylindrical rotor core 5 provided outside the rotor shaft 3, and a ring-shaped bond covering the outer peripheral surface of the rotor core 5. And a magnet member 7.

  The rotor core 5 is made of a thin magnetic steel plate 15 punched by a press. More specifically, the rotor core 5 has a substantially annular shape having a circular opening 15a formed in the center and eight rectangular openings 15b formed at equal intervals on the outer periphery. The thin magnetic steel plate 15 is formed by stacking and integrating so that the circular opening 15 a and the rectangular opening 15 b are continuous in the axial direction of the rotor shaft 3. Thereby, the rotor core 5 has a central through hole 5a (a series of circular openings 15a) having a circular cross section at the center, and eight rectangular cross sections arranged at equal intervals in the circumferential direction of the rotor core 5 at the outer periphery. It has a substantially cylindrical shape having a through hole 5b.

  Then, the rotor shaft 3 is inserted and fixed in the central through hole 5a, and the permanent magnet member 11 having a rectangular cross section extending in the axial direction of the rotor shaft 3 is inserted in the eight through holes 5b in the outer peripheral portion. (For example, Nd sintered magnet, ferrite, etc.) are inserted and fixed. In other words, in this rotor core 5, eight permanent magnet members 11 are arranged at equal intervals so that the longitudinal direction thereof is along the circumferential direction, and these eight permanent magnet members 11 are arranged N on the radially outer side. Eight magnetic poles are formed in which poles and S poles are alternately arranged. That is, the rotor 1 of this embodiment is an embedded magnet type synchronous motor, and can use both reluctance torque due to magnetization of the rotor core 5 and magnet torque due to magnetization of the permanent magnet member 11.

  The bonded magnet member 7 includes a binder resin (for example, polyamide (PA12, etc.), polyphenylene sulfide (PPS), etc.) and permanent magnet powder (for example, Nd sintered magnet, ferrite, etc.), as will be described later. These binder resins (resin materials) and permanent magnet powder are mixed and compounded, and then formed into a ring shape by orientation magnetic field injection molding with a mold 9, and the inner peripheral surface of the bonded magnet member 7. The rotor core 5 and the outer peripheral surface are bonded with a binder resin.

  As shown in FIG. 2, the bonded magnet member 7 is arranged so that the pole 7a of the bonded magnet member 7 faces the same pole as the pole of the permanent magnet member 11 (the outer circumference of the bonded magnet member 7 and the rotor core 5 It is poled anisotropically so as to be located at the intersection with the magnetic pole center line 5c). More specifically, this bonded magnet member 7 is formed by forming an orientation magnetic field of eight poles during orientation magnetic field injection molding, and magnetizing the magnet after aligning the permanent magnet powder so that the easy magnetization axes are aligned. There are eight poles 7 a having the same number as the permanent magnet member 11, the poles facing the N pole of the permanent magnet member 11 and the S poles facing the S pole of the permanent magnet member 11.

  In this way, the ring-shaped bonded magnet member 7 covering the outer peripheral surface of the rotor core 5 is poled anisotropically so that the pole 7a thereof is opposite to the pole of the permanent magnet member 11, thereby obtaining FIG. As shown, since the magnetic flux easily flows in the direction of the white arrow by the bonded magnet member 7, the magnetic flux (a bundle of magnetic lines) 11 a emitted from the N pole of the permanent magnet member 11 is rectified to the stator side (not shown). Will be.

  Thereby, in the conventional rotor 101 in which the bonded magnet member 7 is not provided, as shown in FIG. 4A, a large amount of leakage magnetic flux 111b (magnetic flux component that does not contribute to torque generation) is generated, so that the effective magnetic flux 111a. In the rotor 1 of the present embodiment in which the bonded magnet member 7 is provided while the magnetic flux component contributing to torque generation is small, the leakage magnetic flux 11b of the permanent magnet member 11 is as shown in FIG. While the magnetic flux is greatly reduced, the reduced leakage magnetic flux 11b is rectified to the stator side by the bonded magnet member 7, so that the effective magnetic flux 11a is increased and the torque density can be improved. In FIG. 4, in order to make the drawing easier to see, the magnetic flux is illustrated only for a part of the eight permanent magnet members 11, but the same phenomenon occurs in the other permanent magnet members 11.

  In addition, in the rotor 1 of the present embodiment, the pole 7a covers the outer peripheral surface of the rotor core 5 with the bond magnet member 7 that is poled anisotropically so that the same pole as the pole of the permanent magnet member 11 faces. The magnetic flux density waveform (gap magnetic flux density distribution) on the outer peripheral surface of the rotor core 5 can be made close to a sine wave by increasing the magnetic flux density in the radial direction even at the pole center where it is difficult to pass the magnetic flux. As a result, as shown in FIG. 5, the rotor 1 of the present embodiment (solid line a in FIG. 5) is compared with the conventional rotor without the bonded magnet member 7 (broken line b in FIG. 5). In other words, the steep change in the magnetic flux density can be suppressed, in other words, the gradient of the magnetic flux change can be smoothed, and the cogging torque can be greatly reduced. As a result, vibration and noise of the embedded magnet type synchronous motor can be reduced. Reduction can be realized.

-Rotor manufacturing method-
Next, a method for manufacturing the rotor 1 of the rotating electrical machine according to the present embodiment will be described based on the flowchart shown in FIG.

  First, in step SA1, a substantially annular magnetic steel plate 15 having a circular opening 15a formed in the central portion and eight rectangular openings 15b formed at equal intervals in the outer peripheral portion is punched out with a press, and the magnetic steel plate 15 Are laminated and integrated so that the circular opening 15a and the rectangular opening 15b are continuous in the axial direction to form the rotor core 5 (rotor core forming step).

  In the next step SA2, the permanent magnet powder and the resin material are mixed and compounded (compounding process).

  Next, a mold 9 is prepared. As shown in FIG. 7, the mold 9 includes a fixed mold 19 having a ring-shaped protruding portion 19a, and a bottomed cylindrical movable mold 29 having a cylindrical portion 29a at the center. The distal end of the cylindrical portion 29a is inserted into a portion 19b that is relatively recessed by the portion 19a, and the cylindrical portion 29b of the movable mold 29 is externally fitted to the ring-shaped protruding portion 19a, so that the fixed mold 19 and the movable mold 29 are fitted. Are combined to form a substantially cylindrical cavity 9a. Further, eight gate portions 13 are formed through the outer peripheral portion of the ring-shaped protrusion 19a of the fixed mold 19 at equal intervals, and these eight gate portions 13 are compounded permanent. Each is connected to an injection unit 23 for injecting magnet powder and binder resin.

  Then, in Step SA3, the cylindrical portion 29a is inserted into the central through hole 5a of the rotor core 5 and the mold 9 is clamped to install the rotor core 5 in the cavity 9a formed in the mold 9 ( Installation process). As a result, a ring-shaped space 9b where the eight gate portions 13 face is formed around the rotor core 5 installed in the cavity 9a.

  In the next step SA4, as shown in FIG. 8, eight orienting electromagnets 25 are located outside the mold 9 and at positions facing the through holes 5b of the rotor core 5 installed in the cavity 9a in the radial direction. Place. More specifically, the eight permanent magnet members 11 are inserted into the eight through holes 5b so that the N poles and the S poles are alternately arranged radially outward so as to form the eight poles. The material compounded in step SA2 while applying an orientation magnetic field from the eight orientation electromagnets 25 so as to form eight poles having the same polarity as the poles of the permanent magnet member 11. Is injected into the space 9b from the gate portion 13 to form the ring-shaped bonded magnet member 7 so as to cover the outer peripheral surface of the rotor core 5 (magnetic field orientation injection step). In FIG. 8, the mold 9 is not shown for easy understanding of the drawing.

  The molding conditions in the magnetic field orientation injection molding are as follows: when the binder resin is polyamide, the cylinder temperature is 220 to 270 (° C.), the mold temperature is 50 to 100 (° C.), and the injection pressure is 120 to 170 (MPa). The orientation magnetic field is preferably 5 to 15 (kOe), and when the binder resin is polyphenylene sulfide, the cylinder temperature is 270 to 340 (° C.), the mold temperature is 120 to 150 (° C.), and the injection is performed. It is desirable that the pressure is 130 to 180 (MPa) and the orientation magnetic field is 5 to 15 (kOe).

  When the permanent magnet powder is bonded with the binder resin, in step SA5, the movable mold 29 is separated from the fixed mold 19 to open the mold 9, and the rotor core 5 and the bonded magnet member 7 bonded thereto are bonded to the mold. Demold from 9. Then, in the next step SA6, polar anisotropic magnetization is performed on the permanent magnet powder contained in the debonded bonded magnet member 7 (magnetization step).

  In the next step SA7, the rotor shaft 3 is inserted and fixed in the central through hole 5a formed in the rotor core 5, and in the next step SA8, the eight magnetized permanent magnet members 11 are connected to the N pole radially outward. The eight south holes 5b are inserted and fixed so that the S poles are alternately arranged (insertion fixing step).

  As described above, the rotor 1 of the embedded magnet type synchronous motor in which the outer peripheral surface of the rotor core 5 is covered with the bond magnet member 7 which is poled anisotropically so that the pole of the permanent magnet member 11 faces the same pole. Can be manufactured by a simple method using magnetic field orientation injection molding.

-Effect-
According to the present embodiment, the bonded magnet member 7 is provided so as to cover the outer peripheral surface of the rotor core 5 so that the pole 7 a is poled anisotropically so that the same pole as the pole of the permanent magnet member 11 faces. Therefore, since the bond magnet member 7 plays a role of rectifying the magnetic flux of the permanent magnet member 11 to the stator side, the effective flux linkage component can be increased and the torque density can be improved. Since a sinusoidal magnetic flux density waveform is obtained on the outer peripheral surface, the cogging torque can be reduced. Accordingly, in the rotor 1 of the embedded magnet type synchronous motor, it is possible to achieve both improvement in torque density and reduction in cogging.

  Further, since the bonded magnet member 7 has the same number of poles 7a as the permanent magnet member 11, the magnetic flux of the permanent magnet member 11 is efficiently rectified to the stator side, and an effective flux linkage component is further increased. Can be increased.

(Embodiment 2)
This embodiment is different from Embodiment 1 in that the bonded magnet member 7 is formed independently of the rotor core 5. Hereinafter, differences from the first embodiment will be described.

-Rotor manufacturing method-
A method for manufacturing the rotor 1 of the rotating electrical machine according to the present embodiment will be described based on the flowchart shown in FIG.

  First, the rotor core 5 and the bonded magnet member 7 are prepared. The rotor core 5 has a substantially annular magnetic shape having a circular opening 15a formed in the center and eight rectangular openings 15b formed at equal intervals in the outer periphery, as in step SA1 of the first embodiment. The steel plate 15 can be punched with a press, and the magnetic steel plate 15 can be manufactured by laminating such that the rectangular openings 15b are continuous in the axial direction.

  The bonded magnet member 7 includes, for example, a dummy core that is approximately the same size as the rotor core 5 in the cavity 9a of the mold 9 used in the first embodiment, and as shown in FIG. In this manner, the compounded permanent magnet powder and the resin material are injected from the gate portion 13 into the space 9b while applying an orientation magnetic field from the eight orientation electromagnets 25. In FIG. 10, the mold 9 is not shown for easy understanding of the drawing.

  Then, in Step SB1, the rotor core 5 and the permanent magnet member 11 are arranged so that the same poles of the eight poles of the bonded magnet member 7 and the poles of the eight permanent magnet members 11 embedded in the rotor core 5 face each other. 11, the rotor core 5 is inserted into the bonded magnet member 7, and the outer peripheral surface of the rotor core 5 and the inner peripheral surface of the bonded magnet member 7 are bonded using, for example, an adhesive (bonding step). ).

  In the next step SB2, the rotor shaft 3 is inserted and fixed in the central through hole 5a formed in the rotor core 5, and in the next step SB3, the eight through holes 5b and the eight magnetized permanent magnet members 11 are in the radial direction. Insertion is fixed so that the N pole and the S pole are alternately arranged on the outside (insertion fixing step).

-Effect-
According to the present embodiment, an embedded magnet type synchronous motor capable of achieving both an improvement in torque density and a reduction in cogging can be manufactured even more easily.

(Other embodiments)
The present invention is not limited to the embodiments, and can be implemented in various other forms without departing from the spirit or main features thereof.

  In the first and second embodiments, polyamide and polyphenylene sulfide are used as the binder resin, and Nd sintered magnets and ferrite are used as the permanent magnet powder. These are examples, and other binder resins and permanent magnet powders are used. May be.

  In the first and second embodiments, the number of permanent magnet members 11 embedded in the rotor core 5 is eight. However, the number is not limited to this, and may be six or less or ten or more.

  Furthermore, in the said Embodiment 1 and 2, although the number of the poles of the bond magnet member 7 was made into the same number as the permanent magnet member 11, it may be less than the number of the permanent magnet members 11 not only this but. May be more.

  As described above, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the present invention includes a rotary shaft member serving as a rotation center and a substantially cylindrical rotor core provided on the outer side thereof, and a plurality of permanent magnet members are arranged at substantially equal intervals on the outer periphery of the rotor core. It is useful for the rotor of the rotating electrical machine provided and the manufacturing method thereof.

1 Rotor 3 Rotor shaft (Rotating shaft member)
5 Rotor Core 7 Bonded Magnet Member 7a Pole 9 Mold 9a Cavity 11 Permanent Magnet Member 15 Magnetic Steel Plate 15b Rectangular Opening (Opening)
25 Electromagnet for orientation (magnet for orientation)
SA1 Rotor core formation process SA2 Compounding process SA3 Installation process SA4 Magnetic field orientation injection process SA6 Magnetization process SA7, SA8, SB2, SB3 Insertion fixing process SB1 Joining process

Claims (4)

A rotation shaft member serving as a rotation center; and a substantially cylindrical rotor core provided outside the rotation shaft member; and a plurality of permanent magnet members extending in the axial direction of the rotation shaft member on an outer peripheral portion of the rotor core. A rotor of a rotating electrical machine disposed at substantially equal intervals in the circumferential direction of the rotor core,
The rotor core is formed by laminating a substantially annular magnetic steel plate in the axial direction of the rotary shaft member,
A ring-shaped bonded magnet member including a permanent magnet powder and a resin material covering the outer peripheral surface of the rotor core;
The rotor of a rotating electrical machine, wherein the bond magnet member is poled anisotropically such that the pole of the bond magnet member is opposite to the pole of the permanent magnet member. The rotor of the rotating electrical machine according to claim 1,
The rotor of a rotating electrical machine, wherein the bonded magnet member has the same number of poles as the permanent magnet member. A rotation shaft member serving as a rotation center; and a substantially cylindrical rotor core provided outside the rotation shaft member; and a plurality of permanent magnet members extending in the axial direction of the rotation shaft member on an outer peripheral portion of the rotor core. A method for manufacturing a rotor of a rotating electrical machine disposed at substantially equal intervals in the circumferential direction of the rotor core,
A rotor core is formed by laminating and integrating a substantially annular magnetic steel plate having a plurality of openings through which a permanent magnet member can be inserted on its outer peripheral portion so that the openings are continuous in the axial direction of the rotary shaft member. Process,
A compounding step of mixing permanent magnet powder and resin material into a compound;
An installation step of installing the rotor core in a cavity formed in a mold;
The compounding is performed in a cavity surrounding the outer periphery of the rotor core while applying an orientation magnetic field from an orientation magnet arranged outside the mold so as to face the opening in the radial direction so as to form a plurality of poles. A magnetic field orientation injection step of molding a ring-shaped bonded magnet member so as to cover the outer peripheral surface of the rotor core.
After releasing the rotor core and the bonded magnet member from the mold, a magnetizing step of applying polar anisotropic magnetization to the permanent magnet powder contained in the bonded magnet member;
A method of manufacturing a rotor of a rotating electrical machine, comprising: an insertion fixing step of inserting and fixing the rotating shaft member through the rotor core and fixing the permanent magnet member through the opening of the rotor core. . A rotation shaft member serving as a rotation center; and a substantially cylindrical rotor core provided outside the rotation shaft member; and a plurality of permanent magnet members extending in the axial direction of the rotation shaft member on an outer peripheral portion of the rotor core. A method for manufacturing a rotor of a rotating electrical machine disposed at substantially equal intervals in the circumferential direction of the rotor core,
The rotor core obtained by laminating and integrating a substantially annular magnetic steel plate having a plurality of openings into which the permanent magnet member can be inserted on the outer peripheral portion so that the openings are continuous in the axial direction of the rotating shaft member;
A bond magnet member containing a permanent magnet powder and a resin material and having the anisotropic magnet powder subjected to polar anisotropic magnetization;
A joining step of joining the outer peripheral surface of the rotor core and the inner peripheral surface of the bond magnet member so that the same polarity of the pole of the bond magnet member and the pole of the permanent magnet member opposes;
A method of manufacturing a rotor of a rotating electrical machine, comprising: an insertion fixing step of inserting and fixing the rotating shaft member through the rotor core and fixing the permanent magnet member through the opening of the rotor core. .

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