JP2017216846A - Permanent magnet type rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor for a permanent magnet type rotary electric machine capable of suppressing leakage of magnetic fluxes generated from permanent magnets and increasing a field magnetic flux amount without enlarging a rotor diameter dimension or changing a type of the permanent magnets.SOLUTION: A rotor comprises: permanent magnets 11, 12 and 13 which are arranged three by three for each pole in a rotor core 1a while being substantially U-shaped towards an outer circumferential side and of which the corners in two locations are tapered; and voids 31-36 which are formed at positions adjacent to two locations of tapered corners or non-tapered corners in the permanent magnets 11, 12 and 13.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotating electrical machine such as an electric motor, and more particularly to a permanent magnet type rotating electrical machine having a permanent magnet disposed therein.

  In paragraph [0010] and FIG. 4 of Patent Document 1 below, in the permanent magnet type rotating electrical machine, three permanent magnets are arranged per one pole of the rotor, and they are formed in a substantially U shape. Air gaps 9a1, 9a2, 9b1, 9b2, 9c1, and 9c2 are disposed on both side surfaces of each of these, and leakage magnetic flux generated in each of the ribs 11a, 11b, 10a, and 10b by these air gaps is reduced, and output characteristics are improved. And the technology is disclosed.

  In the paragraph [0007] of Patent Document 2 below and FIG. 3, in the permanent magnet type rotating electric machine, as in Patent Document 1, both sides of three permanent magnets arranged in a substantially U shape per rotor pole are shown. The gaps C1 to C4 are arranged, the side surfaces of the permanent magnet 38 and the ribs 84 are formed substantially in parallel, and the total area of the gaps C1 and C2 is formed to be larger than the total area of the gaps C3 and C4. Thus, a technology is disclosed that the leakage magnetic flux can be further reduced and the output characteristics can be improved.

International Publication No. 2011/002043 JP 2014-165938 A

  In the technique disclosed in Patent Document 1, the gaps 9a1, 9a2, 9b1, 9b2, 9c1, and 9c2 are arranged, so that a loop is formed inside the rotor core 6 (see FIGS. 1 to 4 of Patent Document 1). However, the volume of each permanent magnet inserted into the magnet insertion hole 7 (see FIGS. 1 to 3 of the above-mentioned Patent Document 1) is limited by providing an air gap. When it is desired to further increase the amount of field magnetic flux without changing the type of permanent magnet, it is difficult to increase the volume of the permanent magnet.

  In the technique disclosed in Patent Document 2, as with Patent Document 1, the volume of each permanent magnet is limited due to the arrangement of the air gap. Further, in order to form the side surface of the permanent magnet 38 and the rib 84 substantially in parallel, the gap C2 is not necessarily required, but the gap C1 needs to be formed so that the rib 84 is substantially parallel to the side surface of the permanent magnet 38. Therefore, the volume of the permanent magnet is limited by the gap C1.

  In view of the above technical problem, the present invention suppresses the leakage of magnetic flux generated from a permanent magnet, and increases the field magnetic flux amount without increasing the rotor diameter or changing the type of permanent magnet. An object of the present invention is to provide a permanent magnet type rotating electrical machine that can be increased.

The permanent magnet type rotating electrical machine according to the first invention for solving the above-mentioned problems is
In the rotor core (1a), a permanent magnet type rotating electrical machine having magnet holes formed in a substantially U shape facing the outer peripheral surface (1c) side of the rotor core (1a) as a set of three for each pole. Because
Of the magnet holes, the magnet hole formed in the center is the first magnet hole (12A), the magnet holes formed on the left and right are the second magnet hole (11A) and the third magnet hole (13A),
The first magnet hole (12A) includes a first side surface (72A) formed substantially parallel to the outer peripheral surface (1c), and the rotor core (1a) more than the first side surface (72A). A central portion (82Aa) formed parallel to the first side surface (72A) on the inner peripheral surface side, and a distance from the first side surface (72A) is longer than the central portion (82Aa). Having a second side surface (82A) consisting of both end portions (82Ab)
The second magnet hole (11A) has a third side surface (71A) formed by extending toward the outer peripheral surface (1c) so as to be spaced apart from the first magnet hole (12A) in the circumferential direction, and A fourth side surface (81A) that is formed in parallel to the third side surface (71A) and longer than the third side surface (71A) on the outside of the U-shape from the third side surface (71A); The whole is trapezoidal,
The third magnet hole (13A) is centered on a virtual straight line (O) passing through the center point of the first magnet hole (12A) and the center point of the rotor (1). A fifth side surface (73A) formed symmetrically and extending toward the outer peripheral surface (1c) so as to be spaced apart from the first magnet hole (12A) in the circumferential direction, and the fifth side surface The U-shaped outer side than (73A) is formed in parallel with the fifth side surface (73A), has a sixth side surface (83A) longer than the fifth side surface (73A), and is entirely trapezoidal. And
further,
A first permanent magnet is arranged in each of the first magnet hole (12A), the second magnet hole (11A), and the third magnet hole (13A) such that the magnetization direction is alternated in the circumferential direction for each magnetic pole. A magnet (12), a second permanent magnet (11) and a third permanent magnet (13);
The first permanent magnet (12) has a first gap (33) and a second gap (34) at both ends of the first magnet hole (12A) with respect to the first magnet hole (12A). , Apart from the both end portions of the second side surface (82A), the other side is the shape that is inserted in contact with the entire surface,
The second permanent magnet (11) has a third gap (32) at least at the end of the second magnet hole (11A) on the first magnet hole (12A) side with respect to the second magnet hole (11A). ) So that the surface in contact with the fourth side surface (81A) is shorter than the fourth side surface (81A) and longer than the third side surface (71A), and the other surfaces are all in contact with each other. And
The third permanent magnet (13) has a fourth gap (35) at least at the end of the third magnet hole (13A) on the first magnet hole (12A) side with respect to the third magnet hole (13A). ) So that the surface in contact with the sixth side surface (83A) is shorter than the sixth side surface (83A) and longer than the fifth side surface (73A), and the other surfaces are all in contact with each other. It is characterized by.

The permanent magnet type rotating electrical machine according to the second invention for solving the above-mentioned problems is
In the permanent magnet type rotating electrical machine according to the first invention,
In the rotor core (1a),
The first magnet hole (12A) and the second magnet hole (11A) are formed in such a manner that the side surfaces facing each other are formed in parallel.
The first magnet hole (12 </ b> A) and the third magnet hole (13 </ b> A) have opposite side surfaces formed in parallel.

A permanent magnet type rotating electrical machine according to a third invention for solving the above-mentioned problems is
In the permanent magnet type rotating electrical machine according to the first or second invention,
In the rotor core (1a),
The second permanent magnet (11) further includes the fourth side surface (81) so as to have a fifth gap (31) at an end portion of the second magnet hole (11A) on the outer peripheral surface (1c) side. The surface in contact with the fourth side surface (81A) is shorter than the third side surface (71A),
The third permanent magnet (13) further includes the sixth side surface (83A) so as to have a sixth gap (36) at an end of the third magnet hole (13A) on the outer peripheral surface (1c) side. The surface in contact with the second side surface is shorter than the sixth side surface (86A) and longer than the fifth side surface (73A).

A permanent magnet type rotating electrical machine according to a fourth invention for solving the above-mentioned problems is
In the permanent magnet type rotating electrical machine according to the third invention,
The side surface of the second magnet hole (11A) on the outer peripheral surface (1c) side is formed substantially parallel to the outer peripheral surface (1c),
A side surface of the third magnet hole (13A) on the outer peripheral surface (1c) side is formed substantially parallel to the outer peripheral surface (1c).

A permanent magnet type rotating electrical machine according to a fifth invention for solving the above-mentioned problems is
In the rotor core (1a '), a permanent magnet having magnet holes formed in a substantially U shape facing the outer peripheral surface (1c') side of the rotor core (1a ') as a set of three for each pole. A rotary electric machine,
Among the magnet holes, a magnet hole formed in the center is a first magnet hole (12A ′), and magnet holes formed on the left and right are a second magnet hole (11A ′) and a third magnet hole (13A ′). ,
The first magnet hole (12A ′) includes a first side surface (72A ′) formed substantially parallel to the outer peripheral surface (1c ′), and the rotor core more than the first side surface (72A ′). (1a ′) has a second side surface (82A ′) which is formed in parallel with the first side surface (72A ′) on the outer peripheral surface side and shorter than the first side surface (72A ′), and is entirely trapezoidal. And
The second magnet hole (11A ′) extends from the first magnet hole (12A ′) in the circumferential direction so as to extend toward the outer peripheral surface (1c ′). ) And a fourth side surface (81A ′) formed in parallel to the third side surface (71A ′) inside the U-shape from the third side surface (71A ′),
The third magnet hole (13A ') is centered on an imaginary straight line (O') passing through the center point of the first magnet hole (12A ') and the center point of the rotor (1'). A fifth side surface (73A ′) formed symmetrically with (11A ′) and extending toward the outer peripheral surface (1c ′) so as to be spaced apart from the first magnet hole (12A ′) in the circumferential direction. And a sixth side surface (83A ′) formed in parallel to the fifth side surface (73A ′) inside the U-shape from the fifth side surface (73A ′),
further,
The magnetization directions are alternately arranged in the circumferential direction for each magnetic pole, and are arranged in the first magnet hole (12A ′), the second magnet hole (11A ′), and the third magnet hole (13A ′), respectively. A first permanent magnet (12 '), a second permanent magnet (11') and a third permanent magnet (13 ');
The first permanent magnet (12 ′) has a first gap (33 ′) and a second gap (34 ′) at both ends of the first magnet hole (12A ′) with respect to the first magnet hole (12A ′). ) So that the surface in contact with the first side surface (72A ′) is shorter than the first side surface (72A ′) and longer than the second side surface (82A ′), and the other surfaces are all in contact with each other. Shape
The second permanent magnet (11 ′) is at least at the end of the second magnet hole (11A ′) on the first magnet hole (12A ′) side with respect to the second magnet hole (11A ′). The first magnet hole of the second magnet hole (11A ′) is shorter than the third side surface (71A ′) so that the third side face (71A ′) is in contact with the third side surface (71A ′) so as to have three gaps (32 ′). The part corresponding to the end on the (12A ′) side is a tapered shape, and the other part is a shape that is inserted in contact with the entire surface,
The third permanent magnet (13 ') is at least at the end of the third magnet hole (13A') on the first magnet hole (12A ') side with respect to the third magnet hole (13A'). The first magnet hole of the third magnet hole (13A ′) is such that the surface in contact with the fifth side surface (73A ′) is shorter than the fifth side surface (73A ′) so as to have four gaps (35 ′). The portion corresponding to the end on the (12A ′) side has a tapered shape, and the other portion is in a shape to be inserted in contact with the entire surface.

A permanent magnet type rotating electrical machine according to a sixth invention for solving the above-mentioned problems is
In the permanent magnet type rotating electric machine according to the fifth invention,
In the rotor core (1a ′),
The first magnet hole (12A ′) and the second magnet hole (11A ′) are formed so that the side surfaces facing each other are parallel to each other.
The first magnet hole (12A ') and the third magnet hole (13A') have opposite side surfaces formed in parallel.

A permanent magnet type rotating electrical machine according to a seventh invention for solving the above-mentioned problems is
In the permanent magnet type rotating electrical machine according to the fifth or sixth invention,
In the rotor core (1a ′),
Out of both ends of the side surface of the second magnet hole (11A ′) on the outer peripheral surface (1c ′) side, the end on the outer peripheral surface 1c ′ side has a fifth gap (31 ′). It is a shape recessed on the outer peripheral surface (1c ′) side,
Of the both end portions of the side surface on the outer peripheral surface (1c ′) side of the third magnet hole (13A ′), the end portion on the outer peripheral surface 1c ′ side has a sixth gap (36 ′). It is a shape recessed on the outer peripheral surface (1c ′) side.

A permanent magnet type rotating electrical machine according to an eighth invention for solving the above-mentioned problems is
In the permanent magnet type rotating electrical machine according to the seventh invention,
A seventeenth side surface (61 ′) facing the outer peripheral surface (1c ′) in the fifth gap (31 ′) is formed to be substantially parallel to the outer peripheral surface (1c ′),
The 18th side surface (66 ') which faces the said outer peripheral surface (1c') in the said 6th space | gap (36 ') is formed so that it may become substantially parallel to the said outer peripheral surface (1c').

  According to the permanent magnet type rotating electrical machine according to the present invention, the field magnetic flux can be suppressed without suppressing the leakage of the magnetic flux generated from the permanent magnet, and without increasing the rotor diameter or changing the type of the permanent magnet. The amount can be increased.

It is radial direction sectional drawing for one pole of the rotor of the permanent magnet type rotary electric machine which concerns on Example 1 of this invention. It is radial direction sectional drawing per pole of the rotor core of the permanent magnet type rotary electric machine which concerns on Example 1 of this invention. It is the elements on larger scale of FIG. It is radial direction sectional drawing for one pole of the rotor of the permanent magnet type rotary electric machine which concerns on Example 2 of this invention. It is radial direction sectional drawing per pole of the rotor core of the permanent magnet type rotary electric machine which concerns on Example 2 of this invention. It is the elements on larger scale of FIG.

  Hereinafter, a permanent magnet type rotating electrical machine according to the present invention will be described with reference to the drawings.

[Example 1]
A configuration of the permanent magnet type rotating electric machine according to the present embodiment will be described.
The permanent magnet type rotating electrical machine according to the present embodiment is a general radial gap type, and is arranged in a plurality of circumferential directions on the inner diameter side of the cylindrical stator core and the stator core. And a rotor in which a shaft is inserted into a central portion from a distal end portion of the stator through a radial gap.

First, the configuration of the permanent magnet type rotating electric machine according to the present embodiment will be described “based on a permanent magnet”.
FIG. 1 is a radial cross-sectional view of one pole of a rotor 1 of a permanent magnet type rotating electrical machine according to the present embodiment, and FIG. 2 shows a rotor core 1a of the permanent magnet type rotating electrical machine according to the present embodiment. The radial direction sectional drawing per pole is shown. The permanent magnets 11, 12, 13 are a set of three permanent magnets arranged for each pole of the rotor 1, and are formed on the rotor core 1a as shown in FIGS. The magnet holes 11A, 12A, and 13A are inserted into the magnet holes 11A, 12A, and 13A, and are arranged in a substantially U shape that faces the outer peripheral side through the ribs 21 and 22, respectively.

  FIG. 3 shows a partially enlarged view of FIG. As shown in FIG. 3, the permanent magnet 12 has side surfaces 72 and 82 formed substantially parallel to the outer peripheral surface 1 c of the rotor 1 in a radial cross-sectional view of the rotor 1.

  The permanent magnet 11 extends from the permanent magnet 12 toward the outer peripheral surface 1c of the rotor 1 (so as to be spaced apart from the permanent magnet 12 in the circumferential direction), and has side surfaces 71 and 81 formed in parallel to each other. Have.

  Furthermore, the permanent magnet 13 extends from the permanent magnet 12 toward the outer peripheral surface 1c of the rotor 1 (so as to be spaced apart from the permanent magnet 12 in the circumferential direction), and has side surfaces 73 and 83 formed in parallel to each other. .

  The permanent magnets 11 and 13 are symmetrically formed on both sides of the permanent magnet 12 around a virtual straight line O passing through the center point of the permanent magnet 12 and the center point (not shown) of the rotor 1. The permanent magnets 11, 12, and 13 are arranged in a substantially U shape facing the outer peripheral side.

  The permanent magnets 11, 12, and 13 are tapered at the corners (both ends) in the radial sectional view of the rotor 1. However, the “corner portion” here refers to only the corner portion of the side surface 82 facing the inner peripheral side of the rotor 1 among the side surfaces 72 and 82 in the permanent magnet 12. Moreover, in the permanent magnet 11, only the corner | angular part of the side surface 71 which faces the substantially U-shaped inner side mentioned above among the side surfaces 71 and 81 is pointed out. Furthermore, in the permanent magnet 13, only the corner | angular part of the side surface 73 which faces the substantially U-shaped inner side mentioned above among the side surfaces 73 and 83 is pointed out.

  Of the tapered side surfaces (tapered surfaces) 41, 42 provided at the corners of the side surface 71 of the permanent magnet 11, the tapered surface 42 facing the permanent magnet 12 (that is, the permanent magnet 12 side of both ends of the permanent magnet 11 side). The taper surface 42) which is the surface of the end portion of the permanent magnet 12 and the side surface 53 of the permanent magnet 12 facing the permanent magnet 11 are substantially parallel to each other.

  Further, of the tapered surfaces 45, 46 provided at the corners of the side surface 73 of the permanent magnet 13, the tapered surface 45 facing the permanent magnet 12 (that is, the end of the permanent magnet 13 on the end of the permanent magnet 12 side). The tapered surface 45), which is a surface, and the side surface 54 of the permanent magnet 12 facing the permanent magnet 13 are substantially parallel.

  That is, the rib 21 formed between the permanent magnets 11 and 12 is formed substantially parallel to the tapered surface 42 of the permanent magnet 11 and the side surface 53 of the permanent magnet 12, and is formed between the permanent magnets 12 and 13. The ribs 22 are formed substantially parallel to the tapered surface 45 of the permanent magnet 13 and the side surface 54 of the permanent magnet 12.

  Further, the entire surface of the tapered surface 42 and the side surface 53 is in contact with the rib 21, and the entire surface of the tapered surface 45 and the side surface 54 is in contact with the rib 22.

  Furthermore, the ribs 21 and 22, the tapered surfaces 42 and 45, and the side surfaces 52 and 54 extend in parallel with the virtual straight line O. In consideration of productivity, the permanent magnets 11, 12, and 13 are all the same size and shape.

  Further, in the rotor core 1a, the gaps 33 and 34 are respectively arranged at positions adjacent to the tapered surfaces 43 and 44 provided at the corners of the side surface 82 of the permanent magnet 12 as described above. The gaps 31 and 32 are arranged at positions adjacent to the side faces 51 and 52 orthogonal to the side face 81, respectively, and further, the gaps 35 and 32 are located at positions adjacent to the side faces 55 and 56 perpendicular to the side face 83 of the permanent magnet 13. 36 are arranged respectively. The gaps 31 to 36 are provided as part of the magnet holes 11A, 12A, and 13A formed in the rotor core 1a as shown in FIG.

  Here, since the permanent magnets 11, 12, and 13 have the same size and shape, the corners of the permanent magnet 12 are also tapered, but this embodiment is not limited to this, and the permanent magnet 12 is not limited thereto. May be rectangular.

  A side surface 61 facing the outer peripheral surface 1c of the rotor 1 in the gap 31 is formed to be a straight line (or arc) substantially parallel to the outer peripheral surface 1c of the rotor 1, and a side surface 62 in contact with the rib 21 in the gap 32 is A side surface 63 that is formed on the same line as the tapered surface 42 of the permanent magnet 11 and is in contact with the rib 21 in the gap 33 is formed on the same line as the side surface 53 of the permanent magnet 12. The gaps 34, 35, and 36 are formed so as to be symmetrical with the gaps 31, 32, and 33, respectively, with the virtual straight line O as an axis in the radial cross-sectional view of the rotor 1.

  Of the tapered surfaces 41 and 42 provided at the corners of the side surface 61 and the side surface 71 of the permanent magnet 11, the tapered surface 41 close to the outer peripheral surface 1 c of the rotor 1 and the outer peripheral surface 1 c of the rotor 1. A rib 23 is formed between the two. Of the tapered surfaces 45 and 46 provided at the corners of the side surface 66 and the side surface 73 of the permanent magnet 13, the tapered surface 46 close to the outer peripheral surface 1 c of the rotor 1 and the outer peripheral surface 1 c of the rotor 1. A rib 24 is formed between the two.

  In the permanent magnet type rotating electrical machine according to the present embodiment, the magnetization direction of the permanent magnets (11, 12, 13) forming one magnetic pole of the rotor 1 is set to one magnetic pole by the three permanent magnets 11, 12, 13. As shown, the U-shaped inner and outer sides have the same polarity. In addition, the permanent magnet pairs of magnetic poles adjacent to each other in the circumferential direction are opposite to each other in the magnetization direction, that is, the magnetization directions of the magnetic poles of the rotor 1 are alternated in the circumferential direction. Has been placed.

  1 to 3, the permanent magnets 11, 12, and 13 are inserted into the magnet holes 11 </ b> A, 12 </ b> A, and 13 </ b> A, respectively. However, the present embodiment is not limited to this, for example, A plurality of permanent magnets divided in the circumferential direction and the radial direction in accordance with the magnetization direction may be used per one magnet hole.

Next, the configuration of the permanent magnet type rotating electrical machine according to the present embodiment will be described “based on the magnet hole”.
As shown in FIG. 2, the permanent magnet type rotating electrical machine according to the present embodiment has a substantially U-shape that faces the outer peripheral surface 1c side of the rotor core 1a as a set of three for each pole in the rotor core 1a. Of these magnet holes, the magnet hole formed in the center is referred to as a magnet hole 12A, and the magnet holes formed on the left and right sides thereof are referred to as a magnet hole 11A and a magnet hole 13A.

  The magnet hole 12A is formed in parallel with the side surface 72A on the inner peripheral surface side of the rotor core 1a with respect to the side surface 72A formed substantially parallel to the outer peripheral surface 1c and the side surface 72A, and both end portions from the side surface 72A. It has a side surface 82A that is recessed in the direction of separation.

  The magnet hole 11A is formed in parallel with the side surface 71A on the side surface 71A formed by extending toward the outer peripheral surface 1c so as to be spaced apart from the magnet hole 12A in the circumferential direction, and on the outer side of the U shape from the side surface 71A. It has a side surface 81A that is longer than the side surface 71A, and has a trapezoidal shape as a whole. Specifically, one end of the side surface 71A (the end portion on the side surface 72A side) is separated from the one end of the side surface 72A (the end portion on the side surface 71A side) in a direction parallel to the side surface 72A in the radial sectional view of the rotor 1. The other end of the side surface 71 </ b> A is disposed at a position close to the outer peripheral surface 1 c of the rotor 1. Here, one end of the side surface 71A is assumed to be closer to the magnet hole 12A than the other end of the side surface 71A in a direction parallel to the side surface 72A of the rotor 1 in a radial cross-sectional view.

  The magnet hole 13A is formed symmetrically with the magnet hole 11A around the virtual straight line O passing through the center point of the magnet hole 12A and the center point (not shown) of the rotor 1, and is spaced apart from the magnet hole 12A in the circumferential direction. In this way, the side surface 73A formed by extending toward the outer peripheral surface 1c and the side surface 83A formed in parallel with the side surface 73A and longer than the side surface 73A are formed outside the side surface 73A in a U-shape. The whole is trapezoidal. Specifically, one end of the side surface 73A (the end portion on the side surface 72A side) is in a direction parallel to the side surface 72A in the radial sectional view of the rotor 1 with respect to the other end (end portion on the side surface 73A side) of the side surface 72A. The other end of the side surface 73 </ b> A is disposed at a position close to the outer peripheral surface 1 c of the rotor 1. Here, it is assumed that one end of the side surface 73A is closer to the magnet hole 12A than the other end of the side surface 73A in a direction parallel to the side surface 72A of the rotor 1 in a radial sectional view.

  The permanent magnet type rotating electrical machine according to the present embodiment has the same polarity on the inner side and the outer side of the U shape so as to form one magnetic pole, and the magnetization direction alternates in the circumferential direction for each magnetic pole. The permanent magnet 11, the permanent magnet 12, and the permanent magnet 13 are provided in the magnet hole 11A, the magnet hole 12A, and the magnet hole 13A, respectively.

  The surface of the permanent magnet 12 that is in contact with the side surface 82A is separated from the both end portions of the side surface 82A so that the magnet hole 12A has the air gap 33 and the air gap 34 at both ends of the magnet hole 12A. It has a shape to be inserted. 1 and 3, both end portions of the permanent magnet 12 are tapered, but the present embodiment is not limited to this.

  The permanent magnet 11 has a gap 32 at the end of the magnet hole 11A on the magnet hole 12A side with respect to the magnet hole 11A, and further has a gap 31 at the end on the outer peripheral surface 1c side of the magnet hole 11A. The surface in contact with the side surface 81A is shorter than the side surface 81A, is separated from both end portions of the side surface 81A, is longer than the side surface 71A, and the other surface is in contact with the entire surface.

  The permanent magnet 13 has a gap 35 at the end of the magnet hole 13A on the magnet hole 12A side with respect to the magnet hole 13A, and further has a gap 36 at the end on the outer peripheral surface 1c side of the magnet hole 13A. The surface that contacts the side surface 83A is shorter than the side surface 83A, is separated from both end portions of the side surface 83A, is longer than the side surface 73A, and the other surfaces are inserted in contact with each other.

  Further, in the permanent magnet type rotating electrical machine according to the present embodiment, in the rotor core 1a, the magnet hole 12A and the magnet hole 11A are formed so that the opposing side surfaces are parallel to each other, and the magnet hole 12A and the magnet hole 13A are The side surfaces facing each other are formed in parallel.

  Furthermore, in the permanent magnet type rotating electrical machine according to the present embodiment, the side surface on the outer peripheral surface 1c side of the magnet hole 11A is formed substantially parallel to the outer peripheral surface 1c, and the side surface on the outer peripheral surface 1c side of the magnet hole 13A is the outer peripheral surface. 1c of approximately parallel.

  The above is the description of the configuration of the permanent magnet type rotating electric machine according to the present embodiment. Below, the effect | action of the permanent-magnet-type rotary electric machine which concerns on a present Example is demonstrated.

  In the permanent magnet type rotating electrical machine according to the present embodiment, the magnetic flux generated by the permanent magnet of a certain magnetic pole (first magnetic pole) passes through the teeth and back core of a stator (not shown) and passes through the adjacent magnetic pole (second magnetic pole). Returning to the permanent magnet, the magnetic flux path returns from the permanent magnet of the second magnetic pole to the permanent magnet of the first magnetic pole through the rotor core 1b (see FIG. 1), or the opposite magnetic flux path.

  At this time, for example, part of the magnetic flux generated in the permanent magnets 11, 12, and 13 shown in FIGS. 1 and 3 becomes leakage magnetic flux passing through the ribs 21, 22, 23, and 24, but the tapered surface 41 of the permanent magnet 11 is used. , 42, the side surfaces 53, 54 of the permanent magnet 12, and the taper surfaces 45, 46 of the permanent magnet 13, the presence of the permanent magnets 11, 12, 13, the taper surface 42 of the permanent magnet 11, and the side surfaces of the permanent magnet 12. 53, 54 and the tapered surface 45 of the permanent magnet 13 are provided with gaps 32, 33, 34, 35 so that the side surfaces 62, 63, 64, 65 are on the same line, respectively, and the outer peripheral surface of the rotor 1 Since the side surfaces 61 and 66 are provided so as to be substantially parallel to 1c, the magnetic resistance of the ribs 21, 22, 23, and 24 is high, and the leakage magnetic flux can be reduced.

  That is, first, as for the permanent magnet 12, the taper surfaces 43 and 44 do not contact the magnet hole 12A, and the side surfaces 53 and 54 contact the magnet hole. And, “there are permanent magnets 11, 12, 13 to taper surfaces 41, 42 of permanent magnet 11, side surfaces 53, 54 of permanent magnet 12 and taper surfaces 45, 46 of permanent magnet 13” (described later). It is no longer necessary to widen the ribs 21, 22, 23, and 24), and the magnetic resistance of the permanent magnet itself is almost equal to the magnetic resistance of air, so that the leakage flux of the ribs 21, 22, 23, and 24 can be reduced. Become.

  Further, “the gaps are such that the side surfaces 62, 63, 64, 65 are on the same line with respect to the tapered surface 42 of the permanent magnet 11, the side surfaces 53, 54 of the permanent magnet 12, and the tapered surface 45 of the permanent magnet 13. 32, 33, 34, 35 "and" the side surfaces 61, 66 are provided so as to be substantially parallel to the outer peripheral surface 1c of the rotor 1 ", the width of the ribs 21, 22, 23, 24 respectively. Is constant. If the gaps 31, 32, 33, 34, 35, and 36 are iron cores, the widths of the ribs 21, 22, 23, and 24 are widened so that the magnetic flux does not exist. . Conversely, if the gaps are made large so that the widths of the ribs 21, 22, 23, and 24 are reduced, the leakage of magnetic flux can be reduced, but the strength of the ribs 21, 22, 23, and 24 is lowered and the centrifugal force performance is lowered. (Refer to patent document 2 regarding the rib strength).

  In addition, according to the present embodiment, permanent magnets are arranged in the gap portions in the prior art, and the ratio of the permanent magnets 11, 12, 13 to the magnet holes 11A, 12A, 13A is higher than in the conventional case. The volume of the permanent magnet can be increased.

  That is, since the permanent magnets 11, 12, and 13 have tapered portions, for example, in the rotor shape of FIG. 17 in Patent Document 1, the gaps 9a1, 9a2, and 9c1 positioned on both side surfaces of the rectangular permanent magnets 8a and 8c. , 9c2 can be used to increase the volume of the permanent magnet.

  Therefore, the amount of field magnetic flux can be increased without increasing the rotor diameter or changing the type of permanent magnet.

  Thus, in the permanent magnet type rotating electrical machine according to the present embodiment, each permanent magnet has a tapered portion, so that the leakage flux is reduced by reducing the distance between the permanent magnets while increasing the volume of each permanent magnet. However, the amount of field magnetic flux can be increased.

  Further, in the permanent magnet type rotating electrical machine according to the present embodiment, even when the ribs between the permanent magnets are formed in parallel, the volume of the permanent magnet is increased without providing a gap by using the tapered surface of each permanent magnet. While taking, ribs can be formed in parallel (the rib width is constant).

[Example 2]
The configuration of the permanent magnet type rotating electrical machine according to the present embodiment will be described with a focus on differences from the first embodiment. First, the configuration of the permanent magnet type rotating electric machine according to the present embodiment will be described “based on a permanent magnet”.

  FIG. 4 shows a radial sectional view per one pole of the rotor 1 ′ of the permanent magnet type rotating electric machine according to the present embodiment, and FIG. 5 shows the rotor core 1a of the permanent magnet type rotating electric machine according to the present embodiment. The radial direction sectional drawing per pole of 'is shown. The permanent magnets 11 ′, 12 ′, and 13 ′ are a set of three permanent magnets arranged for each pole of the rotor 1 ′. As shown in FIGS. 4 and 5, the rotor core 1 a The magnet holes 11A ′, 12A ′, and 13A ′ are formed in a substantially U-shape facing the outer peripheral side through the ribs 21 ′ and 22 ′.

  FIG. 6 shows a partially enlarged view of FIG. As shown in FIG. 6, the permanent magnet 12 ′ has side surfaces 72 ′ and 82 ′ formed substantially parallel to the outer peripheral surface 1 c ′ of the rotor 1 ′ in the radial sectional view of the rotor 1 ′. ing.

  The permanent magnet 11 ′ extends from the permanent magnet 12 ′ toward the outer peripheral surface 1 c ′ of the rotor 1 ′ (so as to be spaced apart from the permanent magnet 12 ′ in the circumferential direction), and faces each other 71 ′, 81 ′. have.

  Further, the permanent magnet 13 ′ extends from the permanent magnet 12 ′ toward the outer peripheral surface 1 c ′ of the rotor 1 ′ (so as to be spaced apart from the permanent magnet 12 ′ in the circumferential direction), and faces each other. 83 '.

  The permanent magnets 11 ′ and 13 ′ are symmetrical to each other on both sides of the permanent magnet 12 ′ with a virtual straight line O ′ passing through the center point of the permanent magnet 12 ′ and the center point (not shown) of the rotor 1 ′. By being formed, the permanent magnets 11 ′, 12 ′, and 13 ′ are arranged in a substantially U shape facing the outer peripheral side.

  The permanent magnets 11 ′, 12 ′, and 13 ′ are tapered at the corners (both ends) in the radial cross-sectional view of the rotor 1 ′. However, the “corner portion” here refers to only the corner portion of the side surface 82 ′ facing the outer peripheral side of the rotor 1 ′ among the side surfaces 72 ′ and 82 ′ in the permanent magnet 12 ′. Moreover, in permanent magnet 11 ', only the corner | angular part of side surface 71' which faces the substantially U-shaped outer side mentioned above among side surface 71 ', 81' is pointed out. Furthermore, in permanent magnet 13 ', only the corner | angular part of side 73' which faces the substantially U-shaped outside mentioned above among side 73 ', 83' is pointed out.

  As described above, the side surface 52 ′ of the permanent magnet 11 ′ facing the permanent magnet 12 ′ and the tapered side surfaces (taper surfaces) 43 ′, 44 ′ provided at the corners of the side surface 82 ′ of the permanent magnet 12 ′. Of these, the tapered surface 43 ′ facing the permanent magnet 11 ′ is substantially parallel. Further, the side surface 55 ′ of the permanent magnet 13 ′ facing the permanent magnet 12 ′ and the tapered surface 44 ′ of the permanent magnet 12 ′ are substantially parallel.

  That is, the rib 21 ′ formed between the permanent magnets 11 ′ and 12 ′ is a surface 52 ′ facing the permanent magnet 12 ′ in the permanent magnet 11 ′ and both ends of the tapered shape of the permanent magnet 12 ′. The rib 22 'formed between the permanent magnets 12' and 13 'is formed in a taper shape of the permanent magnet 12'. Are formed substantially parallel to a tapered surface 44 ′ which is a surface of an end portion on the permanent magnet 13 ′ side and a side surface 55 ′ facing the permanent magnet 12 ′ in the permanent magnet 13 ′.

  Further, the entire surface of the tapered surface 43 'and the side surface 52' is in contact with the rib 21 ', and the entire surface of the tapered surface 44' and the side surface 55 'is in contact with the rib 22'.

  In consideration of productivity, the permanent magnets 11 ′, 12 ′, and 13 ′ are all the same size and shape. Here, since the permanent magnets 11 ', 12', and 13 'have the same size and shape, tapered surfaces 41' and 46 'are connected to the side surfaces 51' and 56 'of the permanent magnets 11' and 13 ', respectively. However, the present embodiment is not limited to this, and the portion need not be a tapered surface.

  That is, the permanent magnet 12 ′ in the present embodiment has a different direction from the permanent magnet 12 of the first embodiment, and is arranged so that the side surface 82 ′ having the tapered portion faces the outer peripheral side. Similarly, the other permanent magnets 11 ′ and 13 ′ are provided so that the surface having the tapered portion and the surface not having the tapered portion are replaced with the arrangement in the first embodiment.

  In the rotor core 1a ′, air gaps 33 ′ and 34 ′ are arranged at positions adjacent to the side surfaces 53 ′ and 54 ′ orthogonal to the side surface 72 ′ of the permanent magnet 12 ′, respectively. A gap 32 ′ is disposed at a position adjacent to the tapered surface 42 ′, which is the surface of the end portion on the permanent magnet 12 ′ side, of the both ends of the tapered shape, and further, the taper of the side surface 73 ′ of the permanent magnet 13 ′. A gap 35 ′ is arranged at a position adjacent to the tapered surface 45 ′, which is the surface of the end portion on the permanent magnet 12 ′ side, in both ends of the shape.

  In the rotor core 1a ′, a gap 31 ′ is arranged at a position adjacent to the side surface 51 ′ on the outer peripheral surface 1c ′ side of the rotor 1 ′ among the side surfaces orthogonal to the side surface 81 ′ of the permanent magnet 11 ′. Of the side surfaces orthogonal to the side surface 83 ′ of the permanent magnet 13 ′, the gap 36 ′ is disposed at a position adjacent to the side surface 56 ′ on the outer peripheral surface 1 c ′ side of the rotor 1 ′.

  Note that the gaps 31 ′ to 36 ′ are formed as part of the magnet holes 11 </ b> A ′, 12 </ b> A ′, and 13 </ b> A ′ as shown in FIG. 5.

  A side surface 61 ′ facing the outer peripheral surface 1 c ′ of the rotor 1 ′ in the gap 31 ′ is formed so as to be a straight line (or arc) substantially parallel to the outer peripheral surface 1 c ′ of the rotor 1 ′. 62 ′ is formed on the same line as the side surface 52 ′ of the permanent magnet 11 ′, and the side surface 63 ′ in the gap 33 ′ is formed on the same line as the tapered surface 43 ′ of the permanent magnet 12 ′. The gaps 34 ′, 35 ′, 36 ′ are similarly formed symmetrically on the virtual straight line O ′.

  Further, a rib 23 'is formed between the side surface 61' and the outer peripheral surface 1c 'of the rotor 1'. A rib 24 'is formed between the side surface 66' and the outer peripheral surface 1c 'of the rotor 1'.

  In the permanent magnet type rotating electrical machine according to the present embodiment, the magnetization directions of the permanent magnets (11 ′, 12 ′, 13 ′) forming one magnetic pole of the rotor 1 ′ are three permanent magnets 11 ′, 12 ′, 13 ′ has the same polarity on the inner side and the outer side so that one magnetic pole is formed. At the same time, the pairs of permanent magnets of magnetic poles adjacent in the circumferential direction are opposite to each other in magnetization direction, that is, the magnetization directions of the magnetic poles of the rotor 1 ′ are alternated in the circumferential direction. Each is arranged.

  4 to 6, the permanent magnets 11 ', 12', and 13 'are inserted into the magnet holes 11A', 12A ', and 13A', respectively, but this embodiment is not limited to this. For example, a plurality of permanent magnets divided in the circumferential direction and the radial direction with the magnetization direction aligned may be used per one magnet hole.

Next, the configuration of the permanent magnet type rotating electrical machine according to the present embodiment will be described “based on the magnet hole”.
As shown in FIG. 5, the permanent magnet type rotating electrical machine according to the present embodiment is an approximate one that faces the outer peripheral surface 1 c ′ side of the rotor core 1 a ′ as a set of three for each pole in the rotor core 1 a ′. A magnet hole formed in a U-shape is provided. Among these magnet holes, a magnet hole formed in the center is a magnet hole 12A ', and magnet holes formed on the left and right sides thereof are a magnet hole 11A' and a magnet hole 13A. ′.

  The magnet hole 12A ′ is formed in parallel to the side surface 72A ′ on the side surface 72A ′ formed substantially parallel to the outer peripheral surface 1c ′ and on the inner peripheral surface side of the rotor core 1a ′ from the side surface 72A ′. It has a side surface 82A 'that is shorter than the side surface 72A', and is entirely trapezoidal.

  The magnet hole 11A ′ has a side surface 71A ′ formed by extending toward the outer peripheral surface 1c ′ so as to be spaced apart from the magnet hole 12A ′ in the circumferential direction, and on the inner side of the U shape from the side surface 71A ′. It has a side surface 81A ′ formed in parallel with 71A ′. More specifically, one end of the side surface 71A ′ (the end portion on the side surface 72A ′ side) is opposite to one end of the side surface 72A ′ (the end portion on the side surface 71A ′ side) and the side surface 71A ′ in the radial sectional view of the rotor 1 ′. They are arranged at positions separated in parallel directions. Here, one end of the side surface 71A ′ is closer to the magnet hole 12A ′ than the other end of the side surface 71A ′ in a direction parallel to the side surface 72A ′ of the rotor 1 ′ in the radial cross-sectional view. To do.

  The magnet hole 13A ′ is formed symmetrically with the magnet hole 11A ′ around the virtual straight line O ′ passing through the center point of the magnet hole 12A ′ and the center point of the rotor 1 ′, and extends in the circumferential direction from the magnet hole 12A ′. A side surface 73A ′ formed by extending toward the outer peripheral surface 1c ′ so as to be spaced apart, and a side surface 83A ′ formed in parallel to the side surface 73A ′ on the inner side of the U shape from the side surface 73A ′) doing. More specifically, one end of the side surface 73A ′ (the end portion on the side surface 72A ′ side) is opposite to the other end of the side surface 72A ′ (the end portion on the side surface 73A ′ side). It is arranged at a position separated in a direction parallel to '. Here, one end of the side surface 73A ′ is closer to the magnet hole 12A ′ than the other end of the side surface 73A ′ in a direction parallel to the side surface 72A ′ of the rotor 1 ′ in the radial cross-sectional view. To do.

  The permanent magnet type rotating electrical machine according to the present embodiment has the same polarity on the inner side and the outer side of the U shape so as to form one magnetic pole, and the magnetization direction alternates in the circumferential direction for each magnetic pole. The permanent magnet 11 ', the permanent magnet 12', and the permanent magnet 13 'are provided in the magnet hole 11A', the magnet hole 12A ', and the magnet hole 13A', respectively.

  The surface of the permanent magnet 12 'that contacts the side surface 72A' is shorter than the side surface 72A 'so that the magnet hole 12A' has a gap 33 'and a gap 34' at both ends of the magnet hole 12A '. It has a shape that is spaced from both ends and longer than the side surface 82A ', and the other surfaces are inserted in contact with each other.

  The permanent magnet 11 ′ is located at a position corresponding to the gap 33 ′ (of the magnet hole 12 A ′) of the magnet hole 11 A ′ relative to the magnet hole 11 A ′, that is, the U-shaped portion of the end on the magnet hole 12 A ′ side. The portion corresponding to the end of the magnet hole 11A ′ on the magnet hole 12A ′ side has a tapered shape so as to have an air gap 32 ′ on the outer side, and the other part is in a shape to be inserted in contact with the entire surface. .

  The permanent magnet 13 'is located at a position corresponding to the gap 34' (of the magnet hole 12A ') of the magnet hole 13A' with respect to the magnet hole 13A ', that is, among the end portions on the magnet hole 12A' side. The portion corresponding to the end of the magnet hole 13A ′ on the side of the magnet hole 13A ′ has a tapered shape so as to have a gap 35 ′ on the outside, and the other portion is in a shape to be inserted in contact with the entire surface. .

  Further, in the permanent magnet type rotating electrical machine according to the present embodiment, in the rotor core 1a ′, the magnet hole 12A ′ and the magnet hole 11A ′ are formed such that the side surfaces facing each other are formed in parallel, and the magnet hole 12A ′ and the magnet The opposite side surfaces of the hole 13A 'are formed in parallel.

  Further, in the permanent magnet type rotating electrical machine according to the present embodiment, in the rotor core 1a ′, the end portion on the outer peripheral surface 1c ′ side of the side surface on the outer peripheral surface 1c ′ side of the magnet hole 11A ′ is a gap. 31 'has a shape that is recessed toward the outer peripheral surface 1c' side, and of the both end portions of the side surface of the magnet hole 13A 'on the outer peripheral surface 1c' side, the end portion on the outer peripheral surface 1c 'side is a gap It has a shape recessed toward the outer peripheral surface 1c ′ side so as to have 36 ′.

  In FIGS. 4 to 6, out of both end portions of the side surface of the magnet hole 11 </ b> A ′ on the outer peripheral surface 1 c ′ side, the end portion that is not on the outer peripheral surface 1 c ′ side is a tapered surface. It is not limited to this. Similarly, the end of the magnet hole 13A ′ on the side of the outer peripheral surface 1c ′ side that is not on the outer peripheral surface 1c ′ side is also a tapered surface, but this embodiment is limited to this. It is not a thing.

  In the permanent magnet type rotating electrical machine according to the present embodiment, the side surface 61 ′ facing the outer peripheral surface 1 c ′ in the air gap 31 ′ is formed so as to be substantially parallel to the outer peripheral surface 1 c ′, and the outer peripheral surface 1 c in the air gap 36 ′. The side surface 66 ′ facing ′ is formed so as to be substantially parallel to the outer peripheral surface 1 c ′.

  The above is the description of the configuration of the permanent magnet type rotating electric machine according to the present embodiment. Below, the effect | action of the permanent-magnet-type rotary electric machine which concerns on a present Example is demonstrated.

  In the permanent magnet type rotating electrical machine according to the present embodiment, the magnetic flux generated by the permanent magnet of a certain magnetic pole (first magnetic pole) passes through the teeth and back core of a stator (not shown) and passes through the adjacent magnetic pole (second magnetic pole). Returning to the permanent magnet, the magnetic flux path returns from the permanent magnet of the second magnetic pole to the permanent magnet of the first magnetic pole through the rotor core 1b ′ (see FIG. 4), or a magnetic flux path that is the opposite direction.

  At this time, for example, part of the magnetic flux generated by the permanent magnets 11 ′, 12 ′, and 13 ′ shown in FIGS. 4 and 6 becomes leakage magnetic flux that passes through the ribs 21 ′, 22 ′, 23 ′, and 24 ′. The permanent magnets 11 ′, 12 ′, 13 ′ to the side surfaces 51 ′, 52 ′ of the permanent magnet 11 ′, the tapered surfaces 43 ′, 44 ′ of the permanent magnet 12 ′, and the side surfaces 55 ′, 56 ′ of the permanent magnet 13 ′. Side surfaces 62 ', 63', 64 'with respect to the side surface 52' of the permanent magnet 11 ', the tapered surfaces 43', 44 'of the permanent magnet 12', and the side surface 55 'of the permanent magnet 13'. , 65 ′ are provided on the same line, and gaps 32 ′, 33 ′, 34 ′, 35 ′ are provided, and side surfaces 61 ′, 66 ′ are provided so as to be substantially parallel to the outer peripheral surface 1 c ′ of the rotor 1 ′. Therefore, the magnetic resistance of the ribs 21 ′, 22 ′, 23 ′, 24 ′ is high, and the leakage magnetic flux can be reduced.

  Further, according to the present embodiment, permanent magnets are arranged in the gaps in the prior art, and the permanent magnets 11 ′, 12 ′, and 13 ′ are provided to the magnet holes 11A ′, 12A ′, and 13A ′. The ratio is high, and the volume of the permanent magnet can be increased.

  For example, in order to form the rib 84 so as to be substantially parallel to the side surface of the permanent magnet 38 in the rotor shape of FIG. 3 in Patent Document 2, the gap C1 is required. In this embodiment, FIG. As shown in FIG. 5, by using the tapered portion of the permanent magnet 12 ′, the ribs 21 ′ and 22 ′ between the magnets can be formed in parallel without providing a gap. Therefore, the volume of the permanent magnet can be increased by utilizing the space occupied by the air gap.

  Therefore, the amount of field magnetic flux can be increased without increasing the rotor diameter or changing the type of permanent magnet.

  In the rotor of the permanent magnet type rotating electrical machine according to the present embodiment, each permanent magnet has a tapered portion as in the first embodiment. Therefore, the distance between the permanent magnets is reduced while increasing the volume of each permanent magnet. The amount of field magnetic flux can be increased while reducing the leakage magnetic flux.

  The present invention is suitable as a permanent magnet type rotating electrical machine.

1 Rotor 1 '(in Example 1) Rotor 1a (in Example 2) Rotor core 1a' (in Example 1) Rotor core 1b (in Example 2) Rotor core (in Example 1) 1b ′ (in Example 2) rotor core 1c (outside of rotor in Example 1) outer peripheral surface 1c ′ (outside of rotor in Example 2) 11, 12, 13 Permanent magnet 11 (in Example 1) ', 12', 13 'Permanent magnets 11A, 12A, 13A (in Example 2) Magnet holes 11A', 12A ', 13A' (in Example 1) Magnet holes 21, 22, 23, (in Example 2) 24 ribs 21 ', 22', 23 ', 24' (in Example 1) ribs 31, 32, 33, 34, 35, 36 (in Example 2) gaps 31 ', 32', (in Example 1) 33 ', 34', 35 ' 36 'Air gaps 41, 42, 43, 44, 45, 46 (in the second embodiment) Tapered surfaces 41', 42 ', 43', 44 ', 45', 46 '(in the permanent magnet in the first embodiment) Tapered surfaces 51, 52, 53, 54, 55, 56 (of the permanent magnet in Example 2) Side surfaces 51 ', 52', 53 ', 54', 55 ', 56' (of the permanent magnet in Example 1) (Example) Side surfaces 61, 62, 63, 64, 65, 66 (of the permanent magnet in 2) Side surfaces 61 ', 62', 63 ', 64', 65 ', 66' (in the gap in Example 1) Side surfaces 71, 72, 73 (of the permanent magnet in the first embodiment) Side surfaces 71A, 72A, 73A (of the magnet holes in the first embodiment) Side surfaces 71 ', 72', 73 '(of the permanent magnet in the second embodiment) Side surfaces 71A ′, 72A ′, 73A ′ (in Example 2 Side surfaces 81, 82, 83 (of permanent magnets in Example 1) Side surfaces 81A, 82A, 83A (of magnet holes in Example 1) Side surfaces 81 ', 82', 83 '(Permanent in Example 2) Side surface 81A ', 82A', 83A '(of magnet hole) in Example 2

Claims (8)

In the rotor core (1a), a permanent magnet type rotating electrical machine having magnet holes formed in a substantially U shape facing the outer peripheral surface (1c) side of the rotor core (1a) as a set of three for each pole. Because
Of the magnet holes, the magnet hole formed in the center is the first magnet hole (12A), the magnet holes formed on the left and right are the second magnet hole (11A) and the third magnet hole (13A),
The first magnet hole (12A) includes a first side surface (72A) formed substantially parallel to the outer peripheral surface (1c), and the rotor core (1a) more than the first side surface (72A). A central portion (82Aa) formed parallel to the first side surface (72A) on the inner peripheral surface side, and a distance from the first side surface (72A) is longer than the central portion (82Aa). Having a second side surface (82A) consisting of both end portions (82Ab)
The second magnet hole (11A) has a third side surface (71A) formed by extending toward the outer peripheral surface (1c) so as to be spaced apart from the first magnet hole (12A) in the circumferential direction, and A fourth side surface (81A) that is formed in parallel to the third side surface (71A) and longer than the third side surface (71A) on the outside of the U-shape from the third side surface (71A); The whole is trapezoidal,
The third magnet hole (13A) is centered on a virtual straight line (O) passing through the center point of the first magnet hole (12A) and the center point of the rotor (1). A fifth side surface (73A) formed symmetrically and extending toward the outer peripheral surface (1c) so as to be spaced apart from the first magnet hole (12A) in the circumferential direction, and the fifth side surface The U-shaped outer side than (73A) is formed in parallel with the fifth side surface (73A), has a sixth side surface (83A) longer than the fifth side surface (73A), and is entirely trapezoidal. And
further,
A first permanent magnet is arranged in each of the first magnet hole (12A), the second magnet hole (11A), and the third magnet hole (13A) such that the magnetization direction is alternated in the circumferential direction for each magnetic pole. A magnet (12), a second permanent magnet (11) and a third permanent magnet (13);
The first permanent magnet (12) has a first gap (33) and a second gap (34) at both ends of the first magnet hole (12A) with respect to the first magnet hole (12A). , Apart from the both end portions of the second side surface (82A), the other side is the shape that is inserted in contact with the entire surface,
The second permanent magnet (11) has a third gap (32) at least at the end of the second magnet hole (11A) on the first magnet hole (12A) side with respect to the second magnet hole (11A). ) So that the surface in contact with the fourth side surface (81A) is shorter than the fourth side surface (81A) and longer than the third side surface (71A), and the other surfaces are all in contact with each other. And
The third permanent magnet (13) has a fourth gap (35) at least at the end of the third magnet hole (13A) on the first magnet hole (12A) side with respect to the third magnet hole (13A). ) So that the surface in contact with the sixth side surface (83A) is shorter than the sixth side surface (83A) and longer than the fifth side surface (73A), and the other surfaces are all in contact with each other. A permanent magnet type rotating electric machine characterized by the above. In the rotor core (1a),
The first magnet hole (12A) and the second magnet hole (11A) are formed in such a manner that the side surfaces facing each other are formed in parallel.
The permanent magnet type rotating electrical machine according to claim 1, wherein the first magnet hole (12A) and the third magnet hole (13A) are formed so that the side surfaces facing each other are parallel to each other. In the rotor core (1a),
The second permanent magnet (11) further includes the fourth side surface (81) so as to have a fifth gap (31) at an end portion of the second magnet hole (11A) on the outer peripheral surface (1c) side. The surface in contact with the fourth side surface (81A) is shorter than the third side surface (71A),
The third permanent magnet (13) further includes the sixth side surface (83A) so as to have a sixth gap (36) at an end of the third magnet hole (13A) on the outer peripheral surface (1c) side. 3. The permanent magnet type rotation according to claim 1, wherein a surface in contact with the first side surface is shorter than the sixth side surface (86A) and longer than the fifth side surface (73A). Electric. The side surface of the second magnet hole (11A) on the outer peripheral surface (1c) side is formed substantially parallel to the outer peripheral surface (1c),
The permanent magnet type rotating electrical machine according to claim 3, wherein a side surface of the third magnet hole (13A) on the outer peripheral surface (1c) side is formed substantially parallel to the outer peripheral surface (1c). In the rotor core (1a '), a permanent magnet having magnet holes formed in a substantially U shape facing the outer peripheral surface (1c') side of the rotor core (1a ') as a set of three for each pole. A rotary electric machine,
Among the magnet holes, a magnet hole formed in the center is a first magnet hole (12A ′), and magnet holes formed on the left and right are a second magnet hole (11A ′) and a third magnet hole (13A ′). ,
The first magnet hole (12A ′) includes a first side surface (72A ′) formed substantially parallel to the outer peripheral surface (1c ′), and the rotor core more than the first side surface (72A ′). (1a ′) has a second side surface (82A ′) formed in parallel with the first side surface (72A ′) and shorter than the first side surface (72A ′) on the inner peripheral surface side, Shape,
The second magnet hole (11A ′) extends from the first magnet hole (12A ′) in the circumferential direction so as to extend toward the outer peripheral surface (1c ′). ) And a fourth side surface (81A ′) formed in parallel to the third side surface (71A ′) inside the U-shape from the third side surface (71A ′),
The third magnet hole (13A ') is centered on an imaginary straight line (O') passing through the center point of the first magnet hole (12A ') and the center point of the rotor (1'). A fifth side surface (73A ′) formed symmetrically with (11A ′) and extending toward the outer peripheral surface (1c ′) so as to be spaced apart from the first magnet hole (12A ′) in the circumferential direction. And a sixth side surface (83A ′) formed in parallel to the fifth side surface (73A ′) inside the U-shape from the fifth side surface (73A ′),
further,
The magnetization directions are alternately arranged in the circumferential direction for each magnetic pole, and are arranged in the first magnet hole (12A ′), the second magnet hole (11A ′), and the third magnet hole (13A ′), respectively. A first permanent magnet (12 '), a second permanent magnet (11') and a third permanent magnet (13 ');
The first permanent magnet (12 ′) has a first gap (33 ′) and a second gap (34 ′) at both ends of the first magnet hole (12A ′) with respect to the first magnet hole (12A ′). ) So that the surface in contact with the first side surface (72A ′) is shorter than the first side surface (72A ′) and longer than the second side surface (82A ′), and the other surfaces are all in contact with each other. Shape
The second permanent magnet (11 ′) is at least at the end of the second magnet hole (11A ′) on the first magnet hole (12A ′) side with respect to the second magnet hole (11A ′). The first magnet hole of the second magnet hole (11A ′) is shorter than the third side surface (71A ′) so that the third side face (71A ′) is in contact with the third side surface (71A ′) so as to have three gaps (32 ′). The part corresponding to the end on the (12A ′) side is a tapered shape, and the other part is a shape that is inserted in contact with the entire surface,
The third permanent magnet (13 ') is at least at the end of the third magnet hole (13A') on the first magnet hole (12A ') side with respect to the third magnet hole (13A'). The first magnet hole of the third magnet hole (13A ′) is such that the surface in contact with the fifth side surface (73A ′) is shorter than the fifth side surface (73A ′) so as to have four gaps (35 ′). A portion corresponding to the end on the (12A ′) side has a tapered shape, and the other portion is in a shape to be inserted in contact with the entire surface. In the rotor core (1a ′),
The first magnet hole (12A ′) and the second magnet hole (11A ′) are formed so that the side surfaces facing each other are parallel to each other.
The permanent magnet type rotating electrical machine according to claim 5, wherein the first magnet hole (12A ') and the third magnet hole (13A') are formed so that the side surfaces facing each other are parallel to each other. In the rotor core (1a ′),
Out of both ends of the side surface of the second magnet hole (11A ′) on the outer peripheral surface (1c ′) side, the end on the outer peripheral surface 1c ′ side has a fifth gap (31 ′). It is a shape recessed on the outer peripheral surface (1c ′) side,
Of the both end portions of the side surface on the outer peripheral surface (1c ′) side of the third magnet hole (13A ′), the end portion on the outer peripheral surface 1c ′ side has a sixth gap (36 ′). The permanent magnet type rotating electrical machine according to claim 5 or 6, wherein the permanent magnet type rotating electrical machine has a shape recessed toward the outer peripheral surface (1c ') side. A seventeenth side surface (61 ′) facing the outer peripheral surface (1c ′) in the fifth gap (31 ′) is formed to be substantially parallel to the outer peripheral surface (1c ′),
18th side surface (66 ') which faces the said outer peripheral surface (1c') in the said 6th space | gap (36 ') is formed so that it may become substantially parallel to the said outer peripheral surface (1c'). Item 8. The permanent magnet type rotating electrical machine according to Item 7.

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