JP6336221B1 - Rotor, rotating electrical machine, and method for manufacturing the rotor - Google Patents

Abstract

An object of the present invention is to prevent rust of a magnet even when the gap between the magnets is large and affected by external factors such as outside air. The rotor according to the present invention includes a rotor core and a belt-shaped belt disposed on the surface of the rotor core, and the belt-shaped belt includes a plurality of magnets and a resin that covers a magnet surface other than a surface where the magnet contacts the surface of the rotor core. It is what you have. A method of manufacturing a rotor according to the present invention includes: a belt-shaped belt manufacturing step for manufacturing a belt-shaped belt having a plurality of magnets and a resin that covers a magnet surface other than a surface where the magnet contacts the surface of the rotor core; A resin plate mounting step for attaching the side opposite to the surface and the magnet surface side, a magnetizing step for magnetizing the magnet, a metal plate mounting step for attaching the metal plate to the resin plate on the side opposite to the magnet surface, A resin plate removing step for removing the resin plate attached to the magnet surface, and an attaching step for attaching the magnet surface of the belt-like band to the surface of the rotor core are provided.

Description

  The present invention relates to a rotor of a rotating electrical machine.

  In the SPM (Surface Permanent Magnet) type motor in which the magnet is attached to the surface of the rotor core where multiple steel plates are laminated, the strong magnetism of the magnet can be used efficiently, the motor torque linearity is good, and the controllability is excellent. Yes. On the other hand, magnets tend to chip and crack during high-speed rotation. Accordingly, magnet pieces are generated, and the generated magnet pieces are scattered during the rotation, which causes damage to the stator wires. Patent Document 1 discloses a conventional technique in which a magnet is fixed to a belt-like layer and wound around the surface of a rotor core.

  Also, in order to prevent the magnet from scattering and to suppress vibration of the tape part floating between the magnets, a part of the magnet other than the part where the magnet and the tape are bonded is filled with an adhesive. This technique is disclosed in Patent Document 2 as a conventional technique.

Japanese Patent Laid-Open No. 2-101948 JP, 2015-100202, A

  The above-described conventional technology has been able to suppress magnet scattering and vibration. However, since the gap between the magnets is large and easily affected by external factors such as outside air, there is a problem that rust of the magnet that deteriorates the motor characteristics occurs.

  The present invention has been made to solve such a problem, and an object of the present invention is to prevent rust of a magnet even if it is affected by external factors such as outside air.

The rotor according to the present invention includes a rotor core and a belt-shaped belt disposed on the surface of the rotor core, and the belt-shaped belt includes a plurality of magnets and a resin that covers a magnet surface other than a surface where the magnet contacts the surface of the rotor core. It is what you have.
The method for manufacturing a rotor according to the present invention includes a belt-shaped belt manufacturing step for manufacturing a belt-shaped belt having a plurality of magnets and a resin that covers a magnet surface other than a surface where the magnets contact the surface of the rotor core, and a belt-shaped belt made of a plurality of resin plates. A resin plate mounting step for attaching the magnet surface across the magnet surface side, a magnetizing step for magnetizing the magnet, and a metal plate mounting step for mounting the metal plate on the resin plate on the side opposite to the magnet surface And a resin plate removing step for removing the resin plate attached to the magnet surface, and an attaching step for attaching the magnet surface of the belt-like band to the surface of the rotor core.

  According to this invention, since the surface of the magnet is not affected by the outside air by covering the magnet surface other than the surface in contact with the surface of the rotor core of the belt-shaped belt, the rust of the magnet can be prevented.

It is sectional drawing which cut out the rotor in Embodiment 1 which concerns on this invention by the surface perpendicular | vertical to an axis | shaft. It is sectional drawing of the strip | belt-shaped band in Embodiment 1 which concerns on this invention. It is sectional drawing when attaching the strip | belt-shaped strip | belt in Embodiment 1 which concerns on this invention to a rotor core. It is sectional drawing of the strip | belt-shaped band in Embodiment 2 which concerns on this invention. It is sectional drawing when attaching the strip | belt-shaped strip | belt in Embodiment 2 which concerns on this invention to a rotor core. It is sectional drawing of the strip | belt-shaped band in Embodiment 3 which concerns on this invention. It is a block diagram of the fixing plate of the strip | belt-shaped band in Embodiment 3 which concerns on this invention. It is sectional drawing when attaching the strip | belt-shaped strip | belt in Embodiment 3 which concerns on this invention to a rotor core. It is a block diagram which manufactures the rotor in Embodiment 4 which concerns on this invention. It is sectional drawing of a strip | belt-shaped strip | belt when attaching the resin board in Embodiment 4 which concerns on this invention. It is sectional drawing of a strip | belt-shaped strip | belt when removing the resin board in Embodiment 4 which concerns on this invention. It is sectional drawing when attaching the strip | belt-shaped strip | belt in Embodiment 4 which concerns on this invention to a rotor core.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below. The present invention is not limited to the first embodiment.

  In the first embodiment, in a rotary field type synchronous motor in which a magnet is bonded to the surface of a rotor, since there is a gap between the magnets, it is easily affected by external factors such as rusting of the magnets. It solves the problem.

  The first embodiment will be described with reference to FIGS. 1, 2, and 3.

  FIG. 1 is a cross-sectional view of the rotor 1 cut out by a plane perpendicular to the axis. As shown in FIG. 1, the rotor 1 includes a strip 2 (or strip) and a rotor core 3. The band 2 has a plurality of magnets 4 and a resin 5 that are aligned. The resin 5 covers the magnet surface of the magnet 4 other than in contact with the rotor core 3. In the first embodiment, the magnet 4 is a flat magnet and is not limited to this. For example, a shape such as a saddle shape may be used. Resin 5 is a flexible resin. In the first embodiment, the method for fixing the magnet 4 and the resin 5 uses integral molding with a mold or the like, but is not limited to this.

  FIG. 2 is a cross-sectional view of the band 2 in the first embodiment. In FIG. 2, the belt-like belt 2 has a fixed surface 6 that contacts the rotor core 3. Magnet surfaces 42 other than the surface 41 where the magnet 4 contacts the rotor core 3 are fixed so as to be covered with the resin 5.

  FIG. 3 is a cross-sectional view when the belt-like belt 2 is attached to the rotor core 3. As shown in FIG. 3, the fixing surface 6 of the belt 2 is attached so as to be wound around the rotor core 3. The fixing method of the band 2 and the rotor core 3 in the first embodiment is fixed using an adhesive, but is not limited to this.

  In the case of the first embodiment, the band 2 is composed of a magnet 4 and a resin 5. Magnetization of the magnet 4 may be performed before integral molding, or may be performed after attachment to the rotor core 3. Further, the magnetization of the magnet 4 will be described in detail in a fourth embodiment.

  According to the first embodiment, since the magnet 4 covers the magnet surface 42 other than the fixed surface 41 in contact with the rotor core 3 with the resin 5, the magnet 4 is not affected by the outside air, and the magnet 4 can be prevented from being rusted. It is. In addition, since the flexible resin 5 is attached to the rotor core 3 so as to wind the belt-like belt 2, workability is improved. Furthermore, even if the magnet 4 is cracked or chipped, the magnet surface other than the surface in contact with the rotor core 3 is covered with resin, so that the effect of preventing the magnet from scattering can be obtained.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to FIGS. Constituent elements common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. The second embodiment has a structure for locking the belt-like band 2 and the rotor core 3 to each other from the first embodiment. The second embodiment obtains the same effect as the first embodiment.

  FIG. 4 is a three-dimensional view of the strip 2 in the second embodiment. As shown in FIG. 4, the belt-like belt 2 has a groove portion 7 for engaging with the rotor core 3. A convex portion (not shown) corresponding to the groove portion 7 is provided in the rotor core 3. The locking part is composed of a groove part 7 and a convex part. The belt-like belt 2 may have a convex portion for locking with the rotor core 3 and a groove portion corresponding to the convex portion may be provided in the rotor core 3.

  In the case of a trapezoidal shape or the like where the end is longer than the bottom, the shape of the convex portion has good adhesion. In addition, it is not limited to a shape in this way, What is necessary is just to adhere by inserting a convex part in the groove part 7. FIG.

  Moreover, as shown in FIG. 4, the groove part 7 of the strip 2 does not exist in the length direction in which the magnets 4 are arranged in the strip 2 that is the X-axis direction, but the width direction of the strip 2 that is the Y-axis direction. Exists. That is, the resin 5 between the magnet 4 and the magnet 4 does not have the groove 7 and is entirely covered with the resin 5.

  FIG. 5 is a cross-sectional view showing the band 2 after being attached to the rotor core 3 in the second embodiment. As shown in FIG. 5, the frictional force is generated by inserting the convex portion 8 into the groove portion 7. With this frictional force, the fixing surface 6 of the band 2 is fixed to the rotor core 3. In addition, in order to increase the fixing force between the belt 2 and the rotor core 3, the belt 2 and the rotor core 3 may be further fixed with an adhesive.

  The structure in which the locking portion is provided between the belt-like band 2 and the rotor core 3 has a structure in which the belt-like band 2 is directly fixed to the rotor core 3, so that not only the fixing force between the belt-like band 2 and the rotor core 3 is provided. Since there is a frictional force or the like generated in the locking portion, the fixing force is increased.

  Due to the presence of the groove 7 and the convex portion 8, the rotor core 3 can be positioned in the circumferential direction, and the rotor core 3 can be positioned in the height direction. For this reason, it becomes possible to prevent the belt-like belt 2 from being deformed during production. Further, by improving the positioning accuracy between the belt-like band 2 and the rotor core 3 and increasing the fixing force between the belt-like band 2 and the rotor core 3, torque ripple, which is a fluctuation amount of torque output while the motor is rotating, is reduced. A rotor with good characteristics can be obtained.

  By providing the groove portion 7 in the belt-like belt 2, the resin 5 between the magnet 4 and the magnet 4 does not decrease, and thus the fixing force to the rotor core 3 is increased without reducing the proof strength of the magnets 4 against each other. Can do.

  Furthermore, even if the magnet 4 is cracked or chipped, the magnet surface other than the surface in contact with the rotor core 3 is covered with resin, so that the effect of preventing the magnet from scattering can be obtained.

  According to the second embodiment, since the magnet 4 covers the magnet surface other than the fixed surface in contact with the rotor core 3 with the resin 5, the magnet 4 is not affected by the outside air, and the magnet 4 can be prevented from rusting. . In addition, the fixing force between the belt-like band 2 and the rotor core 3 becomes stronger than in the first embodiment, and the positioning of the rotor core 3 in the circumferential direction and the positioning in the height direction of the rotor core 3 can be performed by providing the locking portion. , Workability is improved.

Embodiment 3 FIG.
The third embodiment of the present invention will be described below with reference to FIGS. Constituent elements common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. The third embodiment has the same structure as that of the second embodiment for locking the belt 2 and the rotor core 3 to each other. In addition, the third embodiment obtains the same effect as the first and second embodiments.

  FIG. 6 is a three-dimensional view of the belt-like band in the third embodiment. FIG. 7 is a three-dimensional view showing the fixing plate in the third embodiment. 6 and 7, the band 2 has a magnet 4, a resin 5, and a fixing plate 9. Fastening holes 10 are provided in the fixing plate 9. The fastening hole 10 is for fixing the belt-like band 2 and the rotor core 3.

  Considering that the magnet 4 is magnetized in the state of the band 2, the fixing plate 9 uses a resin having higher rigidity than the resin 5. As long as the material of the fixing plate 9 is higher in rigidity than the resin 5, a nonmagnetic metal or the like may be used.

  Moreover, the installation position, quantity, and shape of the fixing plate 9 are not limited, and the band 2 and the rotor core 3 may be fixed. In the third embodiment, the fixing plate 9 does not exist in the length direction in which the magnets 4 in the belt-like band 2 are arranged, but is provided in the width direction (Y-axis direction) of the belt-like band 2 with respect to the magnets 4. Thereby, it is possible to prevent the flexibility of the resin 5 from being impaired. If the surface of the magnet 4 other than the fixing surface 6 is not exposed, the fixing plate 9 and the magnet 4 may be in contact with each other.

  FIG. 8 is a cross-sectional view when the strip 2 in the third embodiment is attached to the rotor core 3. As shown in FIG. 8, the insertion hole 12 provided in the rotor core 3 is provided. The insertion hole 12 and the fixing plate 9 constitute a locking portion. The bolt 11 is inserted into the insertion hole 12 of the rotor core 3 through the fastening hole 10 of the fixing plate 9. Accordingly, the fixing plate 9 having higher rigidity than the resin 5 is fixed to the rotor core 3 with the bolts 11. In the third embodiment, as in the first embodiment, the belt 2 and the rotor core 3 may be further fixed with an adhesive. By locking in this way, the positioning accuracy of the belt-like belt 2 can be further improved, the torque ripple that is the fluctuation amount of the torque output while the motor is rotating is reduced, and a rotor with good characteristics can be obtained. It becomes possible. Further, the bolt 11 may be a member such as a press-fit pin.

  According to the third embodiment, since the magnet 4 covers the magnet surface other than the surface in contact with the rotor core 2 with the resin 5, the magnet 4 is not affected by the outside air, and the rust of the magnet can be prevented. In addition, the fixing plate 9 and the rotor core 3 provided on the belt-like belt 2 are fixed by the bolts 11, so that the rigidity of the fixing portion between the belt-like belt 2 and the rotor core 3 is increased, and the positioning accuracy of the belt-like belt 2 is increased. Thus, a rotor with improved characteristics and reduced torque ripple can be obtained. Furthermore, even if the magnet 4 is cracked or chipped, the magnet surface other than the surface in contact with the rotor core 3 is covered with resin, so that the effect of preventing the magnet from scattering can be obtained.

  Moreover, you may combine arbitrary embodiment from said Embodiment 1 to Embodiment 3. FIG.

Embodiment 4
In the fourth embodiment, a manufacturing method for attaching the band 2 to the rotor core 3 when the magnet 4 is magnetized in the state of the band 2 will be described. The fourth embodiment of the present invention will be described below with reference to FIGS. Constituent elements common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the fourth embodiment, a manufacturing method will be described in which productivity is not deteriorated when the magnet 4 provided on the strip 2 is magnetized before being attached to the rotor core 3.

  FIG. 9 is a manufacturing block diagram for manufacturing the rotor according to the fourth embodiment. As shown in FIG. 9, when performing the magnetizing operation of the magnet 4 of the belt 2, the manufacturing method for attaching the belt 2 to the rotor core 3 includes the following steps. In step 1 (band-shaped band manufacturing step), a band-shaped band 2 having a plurality of magnets 4 and a resin 5 covering a magnet surface other than the surface where the magnets 4 are in contact with the surface of the rotor core 3 is manufactured. When completed, go to step 2. In step 2 (resin plate attachment step), the plurality of resin plates 13 are attached with the side opposite to the magnet surface side and the magnet surface side of the belt-like band 2 being sandwiched, and the process proceeds to step 3. In the fourth embodiment, there are two resin plates 13. In step 3 (magnetization step), the magnet 4 is magnetized and the process proceeds to step 4. In step 4 (metal plate attachment step), the metal plate 14 is attached to the resin plate 13 on the side opposite to the magnet surface side, and the process proceeds to step 5. In step 5 (resin plate removal step), the resin plate 13 attached to the magnet surface is removed, and the process proceeds to step 6 (attachment step). In step 6, the magnet surface of the belt 2 is attached to the surface of the rotor core 3.

  As for the production of the belt 2, integral molding or the like may be used as described in the first embodiment, and the description thereof is omitted here. In the fourth embodiment, the integrally formed belt 2 of the first embodiment in which the magnet 4 is not magnetized is used.

  Step 2 will be described with reference to FIG. FIG. 10 is a cross-sectional view showing the band 2 with the resin plate 13 attached. In FIG. 10, the resin plate 13 having higher rigidity than the resin 5 is sandwiched between the fixing surface 6 of the strip 2 and the surface opposite to the fixing surface 6, and the resin plate 13 is attached to the strip 2.

  In a state where the belt 2 is sandwiched between the two resin plates 13, the magnet 2 which is Step 3 is magnetized. Even if a magnetic attractive force between the magnets is generated after magnetization, since the resin plate 13 is sandwiched, the rigidity of the resin plate 13 can prevent deformation of the belt 2 and prevent the magnets from adsorbing each other. It is. Further, since the resin plate 13 is not used to affect the magnetizing work of the magnet 4, it is possible to magnetize without preparing a special magnetizing device.

  Steps 4 and 5 will be described with reference to FIG. FIG. 11 is a diagram showing the belt-like band 2 in a state in which a magnetic metal plate 14 is attached to one resin plate 13a and the other resin plate 13b is removed. As shown in FIG. 11, after magnetizing, the resin plate 13a is attached to one of the two resin plates 13a and 13b sandwiching the belt 2 and the belt 2 and the magnetic metal plate 14 are formed. The metal plate 14 is attached to the resin plate 13a so as to be sandwiched between the two.

  After the metal plate 14 is attached, the other resin plate 13b attached to the fixed surface 6 side of the belt 2 is removed. A magnetic attraction force is generated between the magnet 4 and the metal plate 14 by attaching the metal plate 14 to the other resin plate 13a before removing the other resin plate 13b. Therefore, when removing the resin plate 13b, it is possible to prevent deformation of the band 2 and prevent the magnets from adsorbing each other.

  Step 6 will be described with reference to FIG. FIG. 12 is a cross-sectional view showing the rotor when the band-shaped band 2 is attached to the rotor core 3. As shown in FIG. 12, after removing the resin plate 13 b on the fixed surface 6 side, the belt 2 is attached so as to be wound around the rotor core 3. When the belt 2 is attached to the rotor core 3, a magnetic attractive force is generated between the magnet 4 and the rotor core 3. This magnetic attractive force is larger than the magnetic attractive force generated between the magnet 4 and the metal plate 12. For this reason, after attaching the belt 2 to the rotor core 3, the resin plate 13a and the metal plate 14 attached to the belt 2 can be easily removed.

  According to the fourth embodiment, even if the magnet 4 is magnetized in the state of the belt 2, the productivity can be obtained without deteriorating the productivity.

  The present invention is used for an SPM type motor having a magnet attached to the surface of a rotor core.

DESCRIPTION OF SYMBOLS 1 Rotor, 2 strip | belt-shaped belt | band | zone, 3 rotor core, 4 magnets, 5 resin, 6 fixing surface, 7 groove part, 8 convex part, 9 fixing plate, 10 fastening hole, 11 bolt, 12 insertion hole, 13 resin plate, 14 metal Board

Claims (8)

Rotor core,
A belt-like band disposed on the surface of the rotor core,
The strip has a plurality of magnets and a resin,
The resin is provided with a plurality of holes into which the magnets are inserted,
All the magnet surfaces other than the surface in contact with the surface of the rotor core of the magnet are covered with the resin ,
A rotor provided with a groove part in resin of the belt-like belt, and provided with a convex part corresponding to the groove part in the rotor core . Rotor core,
A belt-like band disposed on the surface of the rotor core,
The strip has a plurality of magnets and a resin,
The resin is provided with a plurality of holes into which the magnets are inserted,
All the magnet surfaces other than the surface in contact with the surface of the rotor core of the magnet are covered with the resin,
Wherein a convex portion is provided on the resin of the strip-shaped zone, features and to Carlo over data providing a groove portion corresponding to the convex portion to the rotor core. The convex portion or the groove portion, the rotor according to claim 1 or claim 2, characterized by the absence in the longitudinal direction having an array of said magnets in said strip zone. Rotor core,
A belt-like band disposed on the surface of the rotor core,
The strip has a plurality of magnets and a resin,
The resin is provided with a plurality of holes into which the magnets are inserted,
All the magnet surfaces other than the surface in contact with the surface of the rotor core of the magnet are covered with the resin,
The strip band, further comprising a fixing plate, wherein the to Carlo over data to be provided in the rotor core fixing portion corresponding to the fixed plate.   The rotor according to claim 4, wherein the fixing plate does not exist in a length direction in which the magnets are arranged in the belt-like belt.   The rotor according to claim 4, wherein the fixing plate is made of resin. The rotating electric machine according to any one of claims 1 to 6, wherein the rotor is an inner rotor. A belt-shaped belt manufacturing step for manufacturing a belt-shaped belt having a plurality of magnets and a resin that covers a magnet surface other than a surface in contact with the surface of the rotor core;
A resin plate attaching step for attaching the magnet surface side of the belt-like band opposite to the magnet surface with a plurality of resin plates; and
A magnetizing step for magnetizing the magnet;
A metal plate attachment step of attaching a metal plate to the resin plate on the side opposite to the magnet surface;
A resin plate removing step of removing the resin plate attached to the magnet surface;
And a mounting step of mounting the magnet surface of the strip on the surface of the rotor core.

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