JP2009273304A - Rotor of rotating electric machine, and rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotor of a rotating electric machine which improves torque efficiently and reduces torque ripple. <P>SOLUTION: Radially oriented magnets 8a and 8b are arranged on the outer periphery of a rotor core 7, and obliquely oriented magnets 9a-9d are arranged on the outside of the radially oriented magnets 8a and 8b. The obliquely oriented magnets 9a and 9b are arranged on both sides across the magnetic pole center line LN in the radially oriented magnet 8a to generate a magnetic flux inclined outward in the radial direction and toward the magnetic pole center line LN and constitute an N magnetic pole together with the radially oriented magnet 8a. The obliquely oriented magnets 9c and 9d are arranged on both sides across the magnetic pole center line LS in the radially oriented magnet 8b to generate a magnetic flux inclined inward in the radial direction and in a direction away from the magnetic pole center line LS and constitute an S magnetic pole together with the radially oriented magnet 8b. The radial thickness (D2) of the obliquely oriented magnets 9a-9d is made relatively larger than the radial thickness (D1) of the radially oriented magnets 8a and 8b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotor of a rotating electrical machine and a rotating electrical machine that are a combination of a radially oriented magnet and other oriented magnets.

Conventionally, a rotor of a rotating electrical machine has a radially oriented magnet having magnetic poles that are radially oriented and alternately different in the circumferential direction, and a plurality of circumferentially oriented circumferentially oriented rotors in order to increase the torque of the rotating electrical machine. Some have a magnet (for example, see Patent Document 1). The plurality of circumferentially oriented magnets are magnetized so that the gap between the circumferentially oriented magnets is arranged on the outer periphery of the radially oriented magnet in accordance with the magnetic pole center position of the radially oriented magnet and repels each other across the gap. In this configuration, a high magnetic field is generated by generating a strong magnetic field in the space surrounded by the circumferentially oriented magnets and the radially oriented magnets adjacent to each other.
JP 2006-217771 A

  However, in the rotating electric machine configured as described above, in the gap portion between the circumferentially oriented magnets, in addition to the magnetic flux that contributes to high torque along the magnetic flux generated in the radially oriented magnet, the magnetic flux generated in the radially oriented magnet A relatively large amount of magnetic flux that cancels out is also generated, which impedes the flow of magnetic flux generated in the radially oriented magnet. As a result, it is not possible to efficiently increase the torque, and it is also required to improve the torque ripple that leads to vibration during rotation, and there is still room for improvement.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a rotor for a rotating electrical machine capable of efficiently increasing torque and reducing torque ripple, and the rotor. It is to provide a rotating electrical machine.

  In order to solve the above-mentioned problems, the invention according to claim 1 includes a radially oriented magnet having radially oriented magnetic poles and different magnetic poles arranged alternately in the circumferential direction, and disposed on the outer periphery of the radially oriented magnet. An obliquely oriented magnet having magnetic poles obliquely oriented with respect to the radial direction on both sides of each magnetic pole center line of the radially oriented magnet, wherein the obliquely oriented magnet has N poles of the radially oriented magnet. In the N-pole region corresponding to, a magnetic flux that is inclined radially outward and toward the magnetic pole center line side is generated, and in the S-pole region corresponding to the S-pole of the radially oriented magnet, The magnetic flux inclined toward the side opposite to the magnetic pole center line is generated, and the radial thickness of the obliquely oriented magnet is relatively thicker than the radial thickness of the radially oriented magnet.

  According to this configuration, the obliquely oriented magnet has a configuration in which a magnetic flux that is inclined radially outward and toward the magnetic pole center line is generated in the N pole region, and in the S pole region, Since the magnetic flux which inclines toward the opposite side is generated, the magnetic flux which cancels out the magnetic flux generated in the radially oriented magnet can be reduced. Therefore, it is possible to increase the magnetic flux along the magnetic flux generated in the radially oriented magnet to generate a strong magnetic field, and it is possible to obtain a rotor capable of efficiently increasing the torque of the rotating electrical machine. In addition, by making the radial thickness of the obliquely oriented magnet relatively thicker than the radial thickness of the radially oriented magnet, compared to the case where the radial thickness of the obliquely oriented magnet and the radially oriented magnet is the same, High torque and low torque ripple can be obtained (see FIG. 5).

  According to a second aspect of the present invention, in the rotor of the rotating electrical machine according to the first aspect, the radial thickness of the obliquely oriented magnet is further set to be twice or less the radial thickness of the radially oriented magnet. Has been.

  According to this configuration, the radial thickness of the obliquely oriented magnet is set to be twice or less the radial thickness of the radially oriented magnet so that the change width of the torque and the torque ripple does not exceed twice, which is more gradual. (See FIG. 5), it is possible to prevent useless thickness setting. Therefore, useless enlargement of the magnet can be prevented, and the rotor can be reduced in size.

According to a third aspect of the present invention, the rotor according to the first or second aspect and a stator formed by winding a winding for generating a magnetic field for rotating the rotor.
According to this configuration, it is possible to obtain a rotating electrical machine that can efficiently increase torque and reduce torque ripple.

  ADVANTAGE OF THE INVENTION According to this invention, while aiming at high torque efficiently, the rotor of the rotary electric machine which can aim at reduction of a torque ripple, and the rotary electric machine provided with this rotor can be provided.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a brushless motor (hereinafter referred to as a motor) 1 as a rotating electrical machine includes a stator 2 and a rotor 3. The stator 2 is formed in a substantially cylindrical shape, and includes twelve teeth 4 extending radially inward, and windings 5 wound around the teeth 4. The stator 2 is configured to generate a rotating magnetic field for rotating the rotor 3 when power from a power supply device (not shown) is supplied to the winding 5.

  The rotor 3 is rotatably supported inside the stator 2. The rotor 3 includes a rotating shaft 6, a substantially cylindrical rotor core 7 fixed to the rotating shaft 6, ten radially oriented magnets 8a and 8b disposed on the outer periphery of the rotor core 7, and the radially oriented magnet 8a. , 8b and 20 obliquely oriented magnets 9a to 9d arranged on the outer periphery.

  Each of the radially oriented magnets 8a and 8b has an arc shape and is formed in the same shape, and is fixed to the outer peripheral surface of the rotor core 7 so that the adjacent radially oriented magnets 8a and 8b abut against each other in the circumferential direction. . Each of the radially oriented magnets 8a and 8b is a radially oriented magnet that generates a magnetic flux along the radial direction. Of the 10 radially oriented magnets 8a and 8b, five radially oriented magnets 8a have outer circumferences. The surface is N-pole and the other five radially oriented magnets 8b have S-poles on the outer peripheral surface, and are arranged so that the magnetic poles are alternately different in the circumferential direction.

  Each of the obliquely oriented magnets 9a to 9d has an arc shape and is formed in the same shape, and the obliquely oriented magnets 9a and 9b are arranged on the outer peripheral surface of the N-pole radially oriented magnet 8a. The obliquely oriented magnets 9c and 9d are fixed to the outer peripheral surface so as to contact each other in the circumferential direction. The obliquely oriented magnets 9a, 9b are arranged on both sides of the magnetic pole center line LN of the radially oriented magnet 8a so as to form an N pole region corresponding to the radially oriented magnet 8a having N poles, and are radially outward and magnetic poles. A magnetic flux that is inclined toward the center line LN is generated. The obliquely oriented magnets 9c and 9d are arranged on both sides of the magnetic pole center line LS of the radially oriented magnet 8b so as to form the south pole region corresponding to the radially oriented magnet 8b of the south pole, and are radially inward and magnetic poles. A magnetic flux that is inclined toward the side opposite to the center line LS is generated. In the present embodiment, the obliquely oriented magnets 9a to 9d have an inclination angle θ of 30 ° in the orientation direction (magnetic pole direction) of the magnetic flux with respect to the magnetic pole centerlines LN and LS extending in the radial direction as shown in FIG. Yes. That is, the obliquely oriented magnets 9a to 9d are oriented so as to be inclined toward the radial direction.

  Here, the torque characteristic with respect to the orientation direction (inclination angle θ with respect to the radial direction) of the obliquely oriented magnets 9a to 9d is shown in FIG. The torque when the tilt angle θ is 0 °, that is, when oriented in the radial direction, is “1”.

  As shown in FIG. 3, in the case of the present embodiment in which the inclination angle θ is set to 30 °, the torque is almost maximized. Incidentally, when the inclination angle θ is in the range of 22.5 ° <θ <45 °, which is around 30 °, it is a preferable range where a sufficient torque can be obtained and the torque can be increased, and the inclination angle θ is 0 ° <θ <80 °. In the range, high torque can be expected. On the other hand, as the inclination angle θ is in the range of 80 ° <θ <90 °, that is, the alignment direction is along the circumferential direction, the torque becomes smaller than the torque when the inclination angle θ is 0 °, and the torque is increased. It is a range that cannot be done.

  FIG. 4 shows the surface magnetic flux density of the rotor 3 when the inclination angle θ is 30 ° (shown by a solid line in FIG. 4) and the surface magnetic flux density of the rotor when the inclination angle θ is 0 ° ( FIG. 4 shows a comparison with (shown by a one-dot chain line).

  As shown in FIG. 4, the surface magnetic flux density of the rotor 3 when the inclination angle θ is 30 ° is higher than the surface magnetic flux density of the rotor 3 when the inclination angle θ is 0 °. Further, the surface magnetic flux density of the rotor 3 when the inclination angle θ is set to 30 ° increases as it approaches the magnetic pole center of each of the radially oriented magnets 8a and 8b, and a particularly strong magnetic field is present near the magnetic pole center. You can see that it has occurred.

  That is, by tilting the orientation direction of the obliquely oriented magnets 9a to 9d as described above with respect to the radial direction, the obliquely oriented magnets 9a to 9d cooperate with the radially oriented magnets 8a and 8b to generate a strong magnetic field. In addition, it is considered that the obliquely oriented magnets 9a to 9d are set to an angle that does not hinder the flow of magnetic flux of the radially oriented magnets 8a and 8b. Thereby, the high torque of the motor 1 of this Embodiment is achieved.

  In addition, as shown in FIG. 2, the thickness ratio value D2 between the radial thickness D2 of the outer obliquely oriented magnets 9a to 9d and the radial thickness D1 of the inner radially oriented magnets 8a and 8b (D2 / D1) is set to “1.5”.

  As shown in FIG. 5, in the case of the present embodiment in which the magnet thickness ratio value (D2 / D1) is set to “1.5”, the magnet thickness ratio value (D2 / D1) is set to “1”, That is, compared to the case where the thicknesses of the obliquely oriented magnets 9a to 9d and the radially oriented magnets 8a and 8b are the same, the high torque and the low torque ripple are respectively good values. Further, when the value of the magnet thickness ratio (D2 / D1) exceeds “2”, it can be seen that the change width of the torque and the torque ripple becomes more gradual, which is a useless thickness setting. By setting the value (D2 / D1) of the magnet thickness ratio to “1.5”, it is possible to prevent unnecessary thickness setting.

Next, the operational effects of the above embodiment will be described below.
(1) The obliquely oriented magnets 9a to 9d are configured to generate a magnetic flux that is inclined radially outward and toward the magnetic pole center line LN in the north pole region corresponding to the north pole of the radially oriented magnet 8a. In the south pole region corresponding to the south pole of the directionally oriented magnet 8b, a magnetic flux that is inclined radially inward and opposite to the magnetic pole center line LS is generated. Therefore, it is possible to reduce the magnetic flux that cancels out the magnetic flux generated in the radially oriented magnets 8a and 8b. Therefore, it is possible to increase the magnetic flux along the magnetic flux generated in the radially oriented magnets 8a and 8b to generate a strong magnetic field, and to obtain the rotor 3 capable of efficiently increasing the torque of the motor 1. it can.

  (2) Since the radial thickness D2 of the obliquely oriented magnets 9a to 9d is relatively larger than the radial thickness D1 of the radially oriented magnets 8a and 8b, the obliquely oriented magnets 9a to 9d and the radially oriented magnet are aligned. Compared with the case where radial thickness D2 and D1 with magnet 8a, 8b are the same, it can be set as a high torque and a low torque ripple. In addition, the radial thickness D2 of the obliquely oriented magnets 9a to 9d is set to be twice or less the radial thickness D1 of the radially oriented magnets 8a and 8b, and the change width of the torque and torque ripple becomes twice more moderate. Therefore, it is possible to prevent the magnets 9a to 9d and the magnets 8a and 8b from being uselessly set. Therefore, the useless enlargement of the obliquely oriented magnets 9a to 9d can be prevented, and the rotor 3 can be reduced in size.

  (3) Since the inclination angle θ in the magnetic pole direction of the obliquely oriented magnets 9a to 9d is set in the range of 0 ° <θ <80 °, higher torque can be achieved more reliably. Among them, the range of 22.5 ° <θ <45 ° is further ensured, and in particular, by setting “30 °”, the torque can be increased extremely efficiently.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment has a configuration in which only the magnetic pole orientation of the obliquely oriented magnet of the first embodiment is changed, and therefore, detailed description of the same parts is omitted.

As shown in FIGS. 6 and 7, the rotor 10 of the present embodiment includes 20 obliquely oriented magnets 11a to 11d arranged on the outer periphery of the radially oriented magnets 8a and 8b.
Each of the obliquely oriented magnets 11a to 11d has an arc shape and is formed in the same shape, and the obliquely oriented magnets 11a and 11b are arranged on the outer peripheral surface of the N-pole radial oriented magnet 8a. The obliquely oriented magnets 11c and 11d are fixed to the outer peripheral surface so as to contact each other in the circumferential direction. The obliquely oriented magnets 11a and 11b divide the magnetic pole center line (the radially oriented magnet 8a into two equal parts in the circumferential direction) of the radially oriented magnet 8a so as to form an N pole region corresponding to the radially oriented magnet 8a having N poles. (Straight line) LN is arranged on both sides of the LN, and a magnetic flux that is inclined radially outward and toward the magnetic pole center line LN is generated.

  More specifically, the obliquely oriented magnets 11a and 11b have a so-called radial orientation configuration in which a radial magnetic flux passing through one point PN on the magnetic pole center line LN set outside thereof is generated. In the present embodiment, the two obliquely oriented magnets 11a and 11b are integrated to form one magnet 11A, and the radial direction of the rotor 10 (magnetic pole center line LN) at the boundary position between the obliquely oriented magnets 11a and 11b. ) Is generated.

  On the other hand, the obliquely oriented magnets 11c and 11d are arranged so as to form a south pole region corresponding to the south pole radially oriented magnet 8b, so that the magnetic pole center line of the radially oriented magnet 8b (the radially oriented magnet 8b is equal to 2 in the circumferential direction). A straight line to be divided) is arranged on both sides of the LS, and a magnetic flux that is inclined radially inward and opposite to the magnetic pole center line LS is generated.

  More specifically, the obliquely oriented magnets 11c and 11d have a so-called radial orientation configuration in which a radial magnetic flux passing through one point PS on the magnetic pole center line LS set outside thereof is generated. In the present embodiment, the two obliquely oriented magnets 11c and 11d are integrated to form one magnet 11B, and the radial direction of the rotor 10 (magnetic pole center line LS) at the boundary position between the obliquely oriented magnets 11c and 11d. ) Is generated.

  Further, as shown in FIG. 7, the distance from the rotation axis center O of the rotor 10 to one point PN, PS on the magnetic pole center lines LN, LS is a distance R, and the magnets 11A, 11B ( If the distance to the outer surface (outer peripheral surface) of the obliquely oriented magnets 11a to 11d) is a distance r, the value of the ratio of the distances R and r representing the radial orientation center positions (points PN and PS) of the magnets 11A and 11B. (R / r) is set to “1.125”.

FIG. 8 shows torque characteristics with respect to the ratio value (R / r) of the distances R and r. The torque when the magnets 11A and 11B are oriented in the radial direction is “1”.
As shown in FIG. 8, in the case of the present embodiment in which the ratio value (R / r) of the distances R and r is set to “1.125”, the torque is almost maximized. Incidentally, if the ratio value (R / r) of the distances R and r is within a range of “2” or less (a range where the distance R is not more than twice the distance r), it is confirmed that a high torque can be expected.

  Further, FIG. 9 shows the surface magnetic flux density of the rotor 10 (indicated by the solid line in FIG. 9) when the ratio value (R / r) of the distances R and r is “1.125”, and the magnets 11A and 11A. The surface magnetic flux density of the rotor when 11B is oriented in the radial direction (shown by a one-dot chain line in FIG. 9) is shown in comparison.

  As shown in FIG. 9, the surface magnetic flux density of the rotor 10 when the ratio value (R / r) of the distances R and r is “1.125” is obtained when the magnets 11A and 11B are oriented in the radial direction. It is higher than the surface magnetic flux density of the rotor. Further, when the ratio value (R / r) of the distances R and r is “1.125”, the surface magnetic flux density of the rotor 10 increases as it goes toward the magnetic pole center of each of the radially oriented magnets 8a and 8b. It can be seen that a particularly strong magnetic field is generated near the center of the magnetic pole.

  This is because the obliquely oriented magnets 11a to 11d cooperate with the radially oriented magnets 8a and 8b to generate a strong magnetic field by inclining the orientation direction of the obliquely oriented magnets 11a to 11d as described above with respect to the radial direction. It is thought to make it. Thereby, the high torque of the motor 1 of this Embodiment is achieved.

  Also in this embodiment, as shown in FIG. 7, the thickness ratio between the radial thickness D2 of the outer obliquely oriented magnets 11a to 11d and the radial thickness D1 of the inner radially oriented magnets 8a and 8b. (D2 / D1) is set to “1.5”, and high torque and low torque ripple are achieved.

Next, a manufacturing mode of the radially oriented magnets 8a and 8b and the magnets 11A and 11B (obliquely oriented magnets 11a to 11d) will be described.
As shown in FIG. 10 (a), the radially oriented magnet 8a is sandwiched between a pair of iron cores 21 and 22 of a so-called magnetizer during the manufacture thereof. One iron core 21 has an arcuate outer peripheral surface 21a that abuts the entire inner peripheral surface of the radially oriented magnet 8a, and has side surfaces 21b that are continuous with each circumferential side surface of the radially oriented magnet 8a. The other iron core 22 has an arcuate inner peripheral surface 22a that abuts the entire outer peripheral surface of the radially oriented magnet 8a, and has side surfaces 22b that are continuous with each circumferential side surface of the radially oriented magnet 8a. . A coil (not shown) is wound around each of the iron cores 21 and 22.

  In such a configuration, by energizing the coil wound around the iron core 21, the iron core 21 generates a magnetic flux along the radial direction that matches the polarity of the radially oriented magnet 8 a and is wound around the iron core 22. By energizing the rotated coil, a magnetic flux is generated in the iron core 22 along the radial direction that matches the polarity of the radially oriented magnet 8a, so that the radially oriented magnet 8a has the above-mentioned characteristics. Magnetized. The magnetization of the radially oriented magnet 8b is performed in substantially the same manner except that the polarity of the magnetic flux generated in the iron cores 21 and 22 is reversed.

  As shown in FIG. 10 (b), the magnet 11A (obliquely oriented magnets 11a and 11b) is sandwiched between a pair of iron cores 23 and 24 of a so-called magnetizer in the production thereof. One iron core 23 has an arcuate outer peripheral surface 23a that contacts the entire inner peripheral surface of the magnet 11A. The other iron core 24 is extended and formed along a straight line (coinciding with the magnetic pole center line LN) that bisects the circumferential direction of the outer side of the magnet 11A. A coil (not shown) is wound around each of the iron cores 23 and 24.

  In such a configuration, a radial magnetic flux passing through one point (coincident with the point PN) on the straight line (LN) set on the iron core 23 outside the magnet 11A by energization of the coil wound around the iron core 23. And a radial magnetic flux that converges on one point on the straight line (LN) is generated in the iron core 24 by energization of the coil wound around the iron core 24, thereby causing the magnet 11A (the obliquely oriented magnet 11a). , 11b) is magnetized to have the aforementioned characteristics. Magnetization of the magnet 11B (the obliquely oriented magnets 11c and 11d) is performed in substantially the same manner except that the polarity of the magnetic flux generated in the iron cores 23 and 24 is reversed, and thus the description thereof is omitted.

As described above in detail, according to the above embodiment, the following effects can be obtained.
(1) Even if the obliquely oriented magnets 11a to 11d having a configuration in which a radial magnetic flux passing through the one point PN, PS is used, the torque of the motor 1 can be efficiently increased as in the first embodiment. Thus, the rotor 10 capable of achieving the above can be obtained.

  (2) The radial thickness D2 of the obliquely oriented magnets 11a to 11d is made relatively thicker than the radial thickness D1 of the radially oriented magnets 8a and 8b in this embodiment, and the thickness D2 is thick. It is set to 2 times or less of D1. Therefore, similarly to the first embodiment, high torque and low torque ripple can be obtained, and useless thickness setting of the magnets 11a to 11d and the magnets 8a and 8b can be prevented.

  (3) Since the distance R from the rotation axis center of the rotor 10 to the one point PN, PS is set to not more than twice the distance r, higher torque can be achieved more reliably. Particularly, by setting the ratio value (R / r) of the distances R and r to “1.125”, it is possible to increase the torque extremely efficiently.

The embodiment of the present invention may be modified as follows.
In the first embodiment, the inclination angle θ with respect to the radial direction of the orientation direction of the obliquely oriented magnets 9a to 9d is set to 30 °, but can be changed as appropriate. The inclination angle θ is preferably in the range of 0 ° <θ <80 °, and more preferably in the range, the inclination angle θ is 22.5 ° <θ <45 °.

  In the first embodiment, a plurality of magnets (obliquely oriented magnets 9a to 9d) each provided with one magnetic pole are used. For example, a plurality of magnetic poles each inclined with respect to the radial direction are provided. It is good also as a structure which reduced the division | segmentation number using a magnet, and is good also as a structure using one substantially cyclic | annular magnet. Note that it is easier to provide a plurality of magnetic poles obliquely oriented in the radial direction in one magnet as compared with a case in which a plurality of circumferentially oriented magnetic poles are provided in one magnet. In this manner, if the obliquely oriented magnet is constituted by one magnet, the obliquely oriented magnet can be easily assembled to the rotor core 7.

  In the first embodiment, the obliquely oriented magnets 9a to 9d are arranged such that the obliquely oriented magnets 9a to 9d adjacent to each other in the circumferential direction are in contact with each other in the circumferential direction, but between the obliquely oriented magnets 9a to 9d. For example, the circumferentially oriented obliquely oriented magnets 9a to 9d may be separated with the magnetic pole center lines LN and LS of the radially oriented magnets 8a and 8b interposed therebetween.

In the second embodiment, the ratio value (R / r) of the distances R and r is set to “1.125”, but can be changed as appropriate. It is preferable to change the distance R so that it is not more than twice the distance r.
In the second embodiment, a plurality of magnets (magnets 11A and 11B) each having a pair of magnetic poles are used. For example, a plurality of magnets each having one or more magnetic poles inclined with respect to the radial direction are used. It is good also as a structure using one magnet, and it is good also as a structure using one substantially cyclic | annular magnet. In this manner, if the obliquely oriented magnet is constituted by one magnet, the obliquely oriented magnet can be easily assembled to the rotor core 7.

  In each of the above embodiments, the value of the thickness ratio (D2 / D1) between the radial thickness D2 of the obliquely oriented magnets 9a to 9d and 11a to 11d and the radial thickness D1 of the radially oriented magnets 8a and 8b Is set to “1.5”, but can be changed as appropriate. It is preferable to change the thickness D2 so that it is not more than twice the thickness D1.

  In each of the above embodiments, a plurality of magnets (radially oriented magnets 8a and 8b) each provided with one magnetic pole are used. For example, the number of divisions using a plurality of magnets each provided with a plurality of radial magnetic poles. It is good also as a structure which reduced this, and it is good also as a structure using one substantially cyclic | annular magnet. As described above, if the radially oriented magnet is configured from one magnet, the assembly of the radially oriented magnet to the rotor core 7 is facilitated.

In each of the above embodiments, the number of poles of the stator 2 is 12 and the number of poles of the rotors 3 and 10 is 10. However, the number of poles of the stator 2 and the rotors 3 and 10 can be appropriately changed.
In each of the above embodiments, the brushless motor 1 is embodied. However, the present invention may be embodied in another motor such as a motor with a brush.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) In the rotor of the rotating electrical machine according to claim 1 or 2, the obliquely oriented magnet is oriented so that an inclination angle θ with respect to a radial direction of the orientation direction satisfies 0 ° <θ <80 °.

  According to this configuration, it is possible to increase the torque more reliably by orienting the obliquely oriented magnet so that the inclination angle θ with respect to the radial direction of the orientation direction satisfies 0 ° <θ <80 ° ( (See FIG. 3).

  (B) In the rotor of the rotating electrical machine according to claim 1 or 2, the obliquely oriented magnet is oriented so that an inclination angle θ with respect to a radial direction of the orientation direction satisfies 22.5 ° <θ <45 °. It was.

  According to this configuration, the obliquely oriented magnet is oriented so that the inclination angle θ of the orientation direction with respect to the radial direction satisfies 22.5 ° <θ <45 °, so that the torque can be increased more reliably. (See FIG. 3).

  (C) In the rotor of the rotating electrical machine according to claim 1 or 2, the obliquely oriented magnet is configured to generate a radial magnetic flux passing through a point on the magnetic pole center line set outside the obliquely oriented magnet.

  According to this configuration, a rotor capable of efficiently increasing torque is obtained with a diagonally oriented magnet having a configuration in which a radial magnetic flux passing through one point on the magnetic pole center line set outside the diagonally oriented magnet is generated. be able to.

  (D) In the rotor of the rotating electrical machine described in (c) above, a distance R from the rotation axis center of the rotor to a point on the magnetic pole center line is a distance r from the rotation axis center to the surface of the obliquely oriented magnet. Is set to 2 times or less.

  According to this configuration, the distance R from the rotation axis center of the rotor to one point on the magnetic pole center line is set to be not more than twice the distance r from the rotation axis center to the surface of the obliquely oriented magnet. Thus, the torque can be increased more reliably (see FIG. 8).

The top view of the motor of a 1st embodiment. The enlarged view of the rotor of the embodiment. The correlation diagram which shows the correlation with an inclination angle and a torque. The surface magnetic flux density distribution figure of a rotor. The correlation diagram which shows the correlation of the torque and torque ripple with respect to the thickness ratio of an outer side diagonal direction magnet and an inner radial direction magnet. The top view of the motor of 2nd Embodiment. The enlarged view of the rotor of the embodiment. The correlation diagram which shows the correlation with radial orientation center position and torque. The surface magnetic flux density distribution figure of a rotor. (A) (b) is a schematic diagram which shows the manufacture aspect of the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motor as a rotary electric machine, 2 ... Stator, 3, 10 ... Rotor, 5 ... Winding, 8a, 8b ... Radially oriented magnet, 9a-9d, 11a-11d ... Diagonally oriented magnet, D1, D2 ... Radial direction Thickness, LN, LS: magnetic pole center line, PN, PS: one point on the magnetic pole center line, θ: inclination angle.

Claims (3)

A radially oriented magnet having radially oriented magnetic poles and alternating magnetic poles in the circumferential direction; and
An obliquely oriented magnet that is disposed on the outer periphery of the radially oriented magnet and has magnetic poles obliquely oriented with respect to the radial direction on both sides of each magnetic pole center line of the radially oriented magnet,
In the N pole region corresponding to the N pole of the radially oriented magnet, the obliquely oriented magnet has a configuration in which a magnetic flux that is inclined radially outward and toward the magnetic pole center line is generated. In the S pole region corresponding to the S pole, a magnetic flux that is inclined radially inward and opposite to the magnetic pole center line is generated.
A rotor of a rotating electric machine, wherein a radial thickness of the obliquely oriented magnet is relatively thicker than a radial thickness of the radially oriented magnet. The rotor of the rotating electrical machine according to claim 1,
The rotor of a rotating electrical machine, wherein a radial thickness of the obliquely oriented magnet is further set to be not more than twice a radial thickness of the radially oriented magnet. The rotor according to claim 1 or 2,
A rotating electric machine comprising: a stator around which a winding for generating a magnetic field for rotating the rotor is wound.

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