JP2011083146A - Permanent magnet type rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet type rotating electric machine which has a rotor structured to increase the possible maximum torque by reducing a leakage magnetic flux and have durability against high torque, and keeps low cogging torque that is likely to be increased when torque increases. <P>SOLUTION: The permanent magnet type rotating electric machine is equipped with a stator and a substantially cylindrical rotor rotatably supported. The rotor has two permanent magnets facing each other in substantial V-shape for each magnetic pole, and a rotor core for constituting a pole shoe separated for each magnetic pole between the two permanent magnets. The permanent magnet type rotating electric machine has a substantially star-like rotor core for supporting the permanent magnets and the rotor core constituting the pole shoe in the circumferential direction of the rotor, and has side plates on both sides of the shaft direction of the permanent magnet, the side plates for supporting the permanent magnets and the rotor core constituting the pole shoe in the diameter direction of the rotor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a rotating electrical machine such as an AC servo motor, and more particularly to a structure of a rotor.

A conventional permanent magnet type rotating electric machine having a stator and a substantially cylindrical rotor supported rotatably is provided with a rotor having two permanent magnets facing each other in a substantially V shape for each magnetic pole. Some have (for example, refer to Patent Document 1).
FIG. 17 is a radial cross-sectional view of a conventional permanent magnet type rotating electric machine, which is a structural example of a permanent magnet type rotating electric machine including a stator and a substantially cylindrical rotor supported rotatably.
In the figure, a permanent magnet type rotating electrical machine includes a stator 1 and a substantially cylindrical rotor 2 that is rotatably supported. The rotor has two permanent magnets 9 facing each other in a substantially V shape for each magnetic pole. Arrange.
The rotor holds the permanent magnet in the permanent magnet mounting hole 7d of the rotor core 7a, and the rotor core is sandwiched between the bridge portion 7b outside the permanent magnet and the two permanent magnets in order to hold the permanent magnet. An inner bridge portion 7c is provided on the rotor core.
Thus, since the permanent magnet is held by the rotor core, the centrifugal force acting on the permanent magnet is supported by the rotor core, and the torque acting on the outer periphery of the permanent magnet or the rotor core is greater than that of the rotor core. Supported by the shaft 8.

In another conventional permanent magnet type rotating electric machine, there is one in which torque acting on the outer periphery of the permanent magnet or the rotor core is supported on the shaft via a side plate (for example, see Patent Document 2).
FIG. 18 is a side view and a radial sectional view of a rotor of another conventional permanent magnet type rotating electrical machine, and a permanent magnet type rotation having a stator and a substantially cylindrical rotor rotatably supported. It is another structural example of an electric machine.
In the figure, a rotor 10 has a rotor core 16 constituting a pole shoe that is separated for each magnetic pole and arranged circumferentially, and permanent magnets 14 that are arranged radially between the pole shoes. The rotor core and the permanent magnet constituting the pole shoe are fixed to the side plate 24.
The rotor core constituting the pole shoe is divided for each pole, and is fixed to the side plate with the rod 22, and the side plate is fixed to the shaft 12.
Since the rotor core is separated for each magnetic pole on the outer side of the permanent magnet and the inner side of the permanent magnet, there is little leakage magnetic flux that shortcuts the bridge portion from the N pole to the S pole as shown in FIG. Most of the magnetic flux generated from the magnet is directed to the gap, and the maximum torque that can be generated can be increased as compared with a permanent magnet type rotating electric machine having a bridge portion.

Thus, the conventional permanent magnet type rotating electrical machine supports the centrifugal force and torque acting on the outer periphery of the two permanent magnets and the rotor core facing each other in a substantially V shape for each magnetic pole by the rotor core and the shaft. Other than the rotor in which two permanent magnets facing each other in a substantially V shape are arranged for each magnetic pole, the bridge portion is abolished by supporting the rotor core separated for each magnetic pole with a side plate, Some have increased the maximum torque that can be generated by a permanent magnet type rotating electrical machine.

JP 2006-304546 A (Page 9, FIG. 1) Japanese Patent No. 3224890 (page 9, FIG. 1)

Since the conventional permanent magnet type rotating electric machine shown in Patent Document 1 has an outer bridge portion of the permanent magnet and an inner bridge portion sandwiched between two permanent magnets in the rotor core, magnetic flux generated from the permanent magnet A part of the magnetic flux does not reach the gap, and becomes a leakage flux that shortcuts the two types of bridge portions from the N pole to the S pole. This lowers the gap magnetic flux density and greatly reduces the maximum torque that can be generated by the permanent magnet type rotating electrical machine.

Another conventional permanent magnet type rotating electric machine shown in Patent Document 2 is capable of withstanding strong torque because the torque acting on the outer periphery of the permanent magnet or rotor core is supported on the shaft via the side plate. I can't.

The present invention has been made in view of such problems, and has a rotor having a structure capable of increasing the maximum torque that can be generated by reducing the leakage magnetic flux and withstanding a strong torque. An object of the present invention is to provide a permanent magnet type rotating electrical machine capable of keeping a cogging torque, which tends to increase with torque, at a low level.

In order to solve the above problem, the present invention is configured as follows.
The invention described in claim 1
In a permanent magnet type rotating electrical machine including a stator and a substantially cylindrical rotor rotatably supported, the rotor includes two permanent magnets facing each other in a substantially V shape for each magnetic pole, and the two A rotor core that constitutes a pole shoe separated for each magnetic pole between permanent magnets;
Having a substantially star-shaped rotor core that supports the rotor core that constitutes the permanent magnet and the pole shoe in the circumferential direction of the rotor;
The permanent magnet type rotating electrical machine is characterized by having side plates for supporting the rotor cores constituting the permanent magnet and the pole shoe in the radial direction of the rotor on both sides in the axial direction of the magnetic poles.
The invention according to claim 2
2. The permanent magnet type rotating electrical machine according to claim 1, wherein the rotor core constituting the pole shoe is supported on side plates on both axial sides by rods penetrating the rotor core in the axial direction. It is.
The invention according to claim 3
The two permanent magnets facing each other in a substantially V shape for each magnetic pole and the rotor core constituting the pole shoe between the two permanent magnets are separate parts, respectively. A permanent magnet type rotating electrical machine is used.
The invention according to claim 4
A substantially star-shaped rotor core that fixes two permanent magnets facing each other in a substantially V shape for each magnetic pole and a rotor core that constitutes a pole shoe between the two permanent magnets in the circumferential direction of the rotor is 2. The permanent magnet type rotating electrical machine according to claim 1, wherein the permanent magnet type rotating electric machine is fitted and fixed with a shaft and an engagement portion formed by unevenness.
The invention according to claim 5
The cross section of the two permanent magnets facing each other in a substantially V shape for each magnetic pole is a pentagon in which one corner of a rectangle is obliquely chamfered, and the two permanent magnets are closely contacted by the chamfered portion. The permanent magnet type rotating electric machine according to claim 1 is provided.
The invention according to claim 6
In a permanent magnet type rotating electrical machine in which a magnetic pole is constituted by an open slot stator core and two permanent magnets facing each other in a substantially V shape for each magnetic pole,
The teeth inner peripheral portion has a shape in which the central arc portion and the straight portions on both sides are connected, and the pole shoe outer peripheral portion has a shape in which the central arc portion and the straight portions on both sides are connected. A magnet-type rotating electrical machine is used.
The invention according to claim 7
The arc part constituting the inner peripheral part of the teeth is a part of a concentric circle common to the arc part constituting the other inner peripheral part of the teeth, and the linear parts on both sides constituting the inner peripheral part of the teeth are perpendicular to the radial direction. The permanent magnet type rotating electric machine according to claim 6, wherein the permanent magnet type rotating electric machine is a part of a straight line.
Further, the invention according to claim 8 is
The arc part constituting the outer periphery of the pole shoe is a part of a concentric circle common to the arc part constituting the other outer periphery of the pole shoe, and the straight parts on both sides constituting the outer periphery of the pole shoe are the end parts of the arc part. The permanent magnet type rotating electric machine according to claim 6, wherein the permanent magnet is a straight line connecting corners of the permanent magnet.
The invention according to claim 9 is
7. The permanent magnet type rotating electric machine according to claim 6, wherein the width of the teeth portion of the stator core is constant in the radial direction or smaller on the inner diameter side.

According to the invention of claim 1,
Because it has a rotor core that constitutes a pole shoe separated for each magnetic pole, it reduces leakage magnetic flux and increases the maximum torque that can be generated,
Rotation with a structure that can withstand strong torque because it has a substantially star-shaped rotor core that supports the rotor core that constitutes the permanent magnet and the pole shoe in the circumferential direction of the rotor and a side plate that supports the rotor core in the radial direction. A permanent magnet type rotating electrical machine having a child can be provided.
According to the invention of claim 2,
Since the rotor core constituting the pole shoe is supported by the side plates on both sides in the axial direction by rods penetrating the rotor core in the axial direction, the rotor core can have a structure strong against centrifugal force.
According to the invention of claim 3,
Since the two permanent magnets and the rotor iron core that constitutes the pole shoe between the two permanent magnets are separate parts, the rotor can constitute the pole shoe separated for each magnetic pole. .
According to the invention of claim 4,
The substantially star-shaped rotor core that fixes two permanent magnets and the rotor core that constitutes the pole shoe between the two permanent magnets in the circumferential direction of the rotor has a shaft and an engagement portion by unevenness. Thus, since the fitting is fixed, a rotor having a structure capable of withstanding a strong torque can be obtained.
According to the invention of claim 5,
The cross section of the two permanent magnets facing each other in a substantially V shape for each magnetic pole is a pentagon in which one corner of the rectangle is obliquely chamfered, and the two permanent magnets are in close contact with each other at the chamfered portion. It is possible to provide a permanent magnet type rotating electrical machine that reduces and increases the maximum torque that can be generated.
According to the invention of claim 6,
The cogging torque of the permanent magnet type rotating electric machine having the stator core of the open slot, which tends to be relatively increased, can be kept low against the increase in the maximum torque.
According to the invention of claim 7,
The cogging torque of the permanent magnet type rotating electric machine can be kept low against the increase in the maximum torque.
According to the invention of claim 8,
The cogging torque of the permanent magnet type rotating electric machine can be kept low against the increase in the maximum torque.
According to the invention of claim 9,
Since the width of the teeth portion of the stator core is constant in the radial direction or smaller on the inner diameter side, it is possible to provide a permanent magnet type rotating electrical machine with a large design space for the stator coil and a large maximum torque.

1 is a sectional view in the axial direction of a permanent magnet type rotating electric machine showing a first embodiment of the present invention; Radial sectional view of the rotating electrical machine Axial sectional view of the rotor of the rotating electrical machine Parts configuration explanatory diagram of the rotor of the rotating electrical machine Assembly explanatory diagram of the rotor of the rotating electrical machine Perspective view of assembled rotor Illustration of stator core shape Radial direction sectional view of the permanent magnet type rotating electrical machine which shows the 2nd example of the present invention. Shape explanatory drawing of the rotor core which comprises the stator core and pole shoe of the said rotary electric machine Cogging torque reduction procedure illustration at the outer periphery of the pole shoe Magnetic field analysis result of cogging torque when the value of a is changed from A1 to A6 Cogging torque reduction procedure explanatory diagram at the inner periphery of teeth Magnetic field analysis result of cogging torque when h is changed Cogging torque analysis results Conventional permanent magnet type rotating electric machine rotor core Comparison of torque characteristics between the conventional permanent magnet type rotating electrical machine and the permanent magnet type rotating electrical machine of this embodiment Radial cross section of a conventional permanent magnet type rotating electrical machine Side view and radial sectional view of a rotor of another conventional permanent magnet type rotating electrical machine

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

FIG. 1 is an axial cross-sectional view of a permanent magnet type rotating electrical machine showing a first embodiment of the present invention for use in an AC servomotor.
In the figure, the rotating electrical machine includes a stator and a substantially cylindrical rotor 60 that is rotatably supported. The rotor is rotatably supported by the load side bracket 51 and the anti-load side bracket 52 via the load-side bearing 58 and the anti-load side bearing 59.
An encoder portion 57 for detecting the rotational position of the rotor is installed at the opposite end portion of the shaft 61.
The stator includes a stator core 53 and a stator coil 54, and the stator coil is attached via an insulator 55 so as to be in close contact with the load side bracket.
Energization of the stator coil is supplied from the outside through a lead wire (not shown) from the stator coil connection portion 56.
The anti-load side bracket is fastened to the load side bracket by a bolt (not shown) together with the frame 50.
An oil seal 49 for enclosing grease is provided on the outside of the load side bearing.

FIG. 2 is a radial sectional view of the rotating electrical machine.
In the figure, the stator is composed of a stator core 53 divided for each tooth and a stator coil 54 wound around concentrated winding and compression-molded on the outer shape. The stator coil is insulated from the stator iron core and the load side bracket 51 by an insulator 55.
The width | variety of the teeth part 53a of the divided | segmented stator core is constant with respect to radial direction, and is what is called an open slot.
The rotor 60 includes two permanent magnets 62 facing each other in a substantially V shape for each magnetic pole, and a rotor core 65 constituting a pole shoe separated for each magnetic pole between the two permanent magnets. It constitutes the pole of the pole. Since the magnetic poles are separated on the outer side and the inner side of the permanent magnet, there is little leakage magnetic flux that shortcuts the bridge portion from the N pole to the S pole as shown in FIG. 17, and much of the magnetic flux generated from the permanent magnet is large. The maximum torque that can be generated can be increased as compared with a permanent magnet type rotating electric machine having a bridge portion facing the gap.
The rod 63 penetrates the rotor core that forms a pole shoe formed by laminating electromagnetic steel plates.
The substantially star-shaped rotor core 64 is supported in the circumferential direction of the rotor with respect to the torque acting on the rotor core constituting the permanent magnet or pole shoe, and has a mating portion 64b by concavity and convexity to be fitted to the shaft. Since it is fixed, a rotor having a structure capable of withstanding a strong torque can be obtained.

FIG. 3 is an axial sectional view of a rotor of the rotating electrical machine.
In the figure, the rotor has a load side plate 66 and an anti-load side plate 67 that support a permanent magnet 62 and a rotor core 65 constituting a pole shoe in the radial direction of the rotor on both sides in the axial direction of the magnetic pole. Since the rotor iron core constituting the pole shoe is supported on the side plates on both axial sides by the rods 63 penetrating the rotor iron core in the axial direction, the rotor iron can have a structure strong against centrifugal force.

FIG. 4 is an explanatory diagram of a component configuration of the rotor of the rotating electrical machine.
In the figure, two permanent magnets 62 facing each other in a substantially V shape for each magnetic pole and a rotor core 65 constituting a pole shoe between the two permanent magnets are separate parts. The rotor core that constitutes the permanent magnet and the pole shoe is mounted on a substantially star-shaped rotor core 64 to constitute a pole shoe separated for each magnetic pole.
The substantially star-shaped rotor iron core is fitted and fixed to the shaft 61 by fitting the shaft fitting hole 64a to the shaft 61 and the engagement portion 64b formed by the unevenness.
The load side plate 66 is fitted to the shaft through the shaft fitting hole 66c, and the rod 63 penetrating the rotor core constituting the permanent magnet and the pole shoe is engaged and fixed to the permanent magnet support hole 66a and the rod support hole 66b.

FIG. 5 is an assembly explanatory diagram of the rotor of the rotating electrical machine.
In the figure, after mounting a permanent magnet 62, a rotor core 65 constituting a pole shoe, a substantially star-shaped rotor core 64 and a load side plate 66 on a shaft 61, an anti-load side plate 67 is connected to a shaft fitting hole. The rod 63 that fits to the shaft with 67c and penetrates the rotor core constituting the permanent magnet and the pole shoe is engaged and fixed in the permanent magnet support hole 67a and the rod support hole 67b.

FIG. 6 is a perspective view of the assembled rotor.
The assembled rotor is impregnated and dried with the impregnating adhesive material and firmly integrated.
The load side plate 66 and the anti-load side plate 67 are manufactured by press-molding a nonmagnetic metal plate such as stainless steel so as not to increase the leakage magnetic flux.

FIG. 7 is an explanatory diagram of the shape of the stator core.
In the figure, since the width of the tooth portion 53a of the divided stator core 53 is constant in the radial direction, a permanent magnet type rotating electrical machine having a large design space for the stator coil and a large maximum torque can be provided.

As described above, according to the permanent magnet type rotating electrical machine of the present embodiment, the permanent magnet type having a rotor having a structure capable of reducing leakage magnetic flux, increasing the maximum torque that can be generated, and withstanding strong torque. A rotating electrical machine can be provided.

The part in which the present invention is different from Patent Document 1 is not an integral rotor core, but a part having a rotor core that constitutes a pole shoe separated for each magnetic pole.
The portion where the present invention is different from Patent Document 2 is a portion where torque acting on a rotor core constituting a permanent magnet or a pole shoe is supported by a shaft from a substantially star-shaped rotor core instead of a side plate.

FIG. 8 is a radial cross-sectional view of a permanent magnet type rotating electrical machine showing a second embodiment of the present invention. The present embodiment differs from the first embodiment only in the shape of the rotor core that constitutes the permanent magnet and the pole shoe.
In the figure, a rotor 80 has two permanent magnets 82 facing each other in a substantially V shape for each magnetic pole, and a rotor core 85 constituting a pole shoe separated for each magnetic pole between the two permanent magnets. And 10 magnetic poles are formed.
The cross section of the two permanent magnets facing each other in a substantially V shape for each magnetic pole is a pentagon in which one corner of the rectangle is obliquely chamfered, and the two permanent magnets are in close contact with each other at the chamfered portion. Since the inside of the permanent magnet is in close contact, the leakage magnetic flux is smaller than in the first embodiment, and most of the magnetic flux generated from the permanent magnet is directed to the gap, and the maximum torque that can be generated can be further increased.

FIG. 9 is an explanatory view of the shape of the rotor core constituting the stator core and the pole shoe of the rotating electric machine.
In the figure, the teeth inner peripheral portion 73a of the stator core has a shape in which a central arc portion 73aa and linear portions 73ab on both sides are connected, and the pole shoe outer peripheral portion 85a of the rotor core constituting the pole shoe is formed at the center. The arc portion 85aa and the linear portions 85ab on both sides are connected to each other.
A central arc portion 73aa constituting the inner peripheral portion of the teeth is a part of a concentric circle 73c common to the arc portions constituting the inner peripheral portion of the other teeth. The straight portions 73ab on both sides constituting the teeth inner peripheral portion are part of a straight line perpendicular to the radial direction.
The central arc portion 85aa that constitutes the pole shoe outer peripheral portion is a part of a concentric circle 85c that is common to the arc portions that constitute the other pole shoe outer peripheral portions. The straight portions 85ab on both sides constituting the pole shoe outer peripheral portion are straight lines connecting the corners 85ad of the permanent magnet from the end of the central arc portion.
Cogging torque can be reduced by making the length to both ends of the central arc portion that constitutes the inner peripheral portion of the teeth and the length to both ends of the central arc portion constituting the outer peripheral portion of the pole shoe appropriate. Can do.

The procedure to reduce the cogging torque by making the length to both ends of the central arc portion that constitutes the inner peripheral portion of the teeth and the length to both ends of the central arc portion constituting the outer peripheral portion of the pole shoe appropriate. explain.
FIG. 10 is an explanatory diagram of a cogging torque reduction procedure at the outer periphery of the pole shoe of the rotor core constituting the pole shoe.
First, the teeth inner peripheral portion 73a shown in FIG. 9 is only a part of a concentric circle common to other stator iron cores, and forms a pole shoe outer peripheral portion in FIG. A value at which the cogging torque is minimized is examined by changing the distance a from the midpoint 85ac of the arc portion, which determines the intersection of the straight portions 85ab on both sides with the center arc portion 85aa.

FIG. 11 shows magnetic field analysis results of cogging torque when the value of a is changed from A1 to A6.
(A) shows how the cogging torque changes with respect to the rotation angle of the rotor. The torque value is shown as a percentage of the rated torque.
(B) shows the maximum value of each cogging torque with the value of a as the horizontal axis. From (B), it can be seen that the cogging torque is minimized when a is near A3 or A4.

FIG. 12 is an explanatory diagram of a cogging torque reduction procedure in the inner peripheral portion of the teeth of the stator core.
Next, the shape of the outer periphery of the pole shoe shown in FIG. 10 is changed from A3 where the cogging torque is the smallest to A6 where the range of the arc portion constituting the outer periphery of the pole shoe becomes smaller. In the shape of FIG. 12, the value of h, which is the distance from the middle point 73ac of the central arc portion 73aa to the linear portion 73ab on both sides constituting the teeth inner peripheral portion 73a, is changed from H0 to H5 in FIG. Check the value that minimizes the torque. H0 is a shape that does not have the straight portions on both sides, and has the same specifications as A3 to A6 shown in FIG. At H5, the central arc portion disappears.

FIG. 13 is a magnetic field analysis result of cogging torque when the value of h is changed in the shape of each value of a.
(A) is a magnetic field analysis result of cogging torque when the value of h is changed from H0 to H1 in a shape in which the value of a is A3. The cogging torque of H1 is larger than that of H0. Other shapes of the value of h do not need to be examined because good results cannot be expected.
(B) is a magnetic field analysis result of cogging torque when the value of h is changed from H0 to H5 in a shape in which the value of a is A6. The result shows that the cogging torque becomes the minimum value when the value of h is H3.
For H4 and H5, the same analysis is performed to check the value at which the cogging torque is minimized.

FIG. 14 shows the cogging torque analysis result described above, and shows the maximum value of each cogging torque with the value of h as the horizontal axis.
In the figure, the specification with the smallest cogging torque is the shape of a = A5, h = H3, and the cogging torque is minimized.
It can also be seen that between H3 and H5, the change in the cogging torque is small with respect to the change in h 1, and therefore the risk that the cogging torque will increase with respect to the dimensional error of the teeth portion is low. It is desirable to select a shape that has a small cogging torque and a small change in cogging torque with respect to changes in dimensions of a and h.
In addition, when it is difficult to give superiority or inferiority with the cogging torque, it is advantageous for increasing the torque to increase the range of the arc portion constituting the teeth inner peripheral portion and the central arc portion constituting the pole shoe outer peripheral portion. is there.

The cogging torque reduction method shown in FIGS. 9 to 14 is the same as that of the conventional permanent magnet type rotating electric machine having two permanent magnets 92 facing each other in a substantially V shape and a bridge portion shown in FIG. The present invention can also be applied to the shape of the rotor core 95.
In this case, the pole shoe outer peripheral portion 95a has the same shape in which the central arc portion 95aa and the straight portions 95ab on both sides are connected.
The central arc part constituting the pole shoe outer peripheral part is a part of a concentric circle common to the arc part constituting the other pole shoe outer peripheral part, and the linear parts on both sides constituting the pole shoe outer peripheral part are central arcs. It is a straight line connecting the end 95ae of the outer bridge part surrounding the permanent magnet from the end point of the part.
Since the same applies to the stator core, the cogging torque can be reduced by setting a and h shown in FIGS. 10 and 12 to appropriate lengths.

FIG. 16 is a torque characteristic comparison diagram of a conventional permanent magnet type rotating electric machine having two permanent magnets facing each other in a substantially V shape for each magnetic pole and a bridge portion, and the permanent magnet type rotating electric machine of the present embodiment. .
In the rotating electrical machine using the rotor of the present embodiment, since the leakage flux of the magnetic flux generated from the permanent magnet is small, the maximum torque that can be generated by the motor can be greatly increased.

As described above, according to the permanent magnet type rotating electrical machine of this embodiment, both the low cogging torque and the large torque of the permanent magnet type rotating electrical machine having an open slot stator core, which tends to be relatively increased, can be achieved. .

The permanent magnet type rotating electric machine of the present invention can be applied not only to a servo motor but also to a general-purpose motor because the maximum torque that can be generated by the rotating electric machine is large.

49 Oil seal 50 Frame 51 Load side bracket 52 Anti load side bracket 53 Stator core 53a Teeth portion 54 Stator coil 55 Insulator 56 Connection portion 57 Encoder portion 58 Load side bearing 59 Anti load side bearing 60 Rotor 61 Shaft 62 Permanent magnet 63 Rod 64 Robust iron core 64a Shaft fitting hole 64b Engagement portion 65 Rotor core 66 constituting pole shoe Load side plate 66a Permanent magnet support hole 66b Rod support hole 66c Shaft fitting hole 67 Anti-load side plate 67a Permanent magnet support hole 67b Rod support hole 67c Shaft fitting hole

Claims (9)

In a permanent magnet type rotating electrical machine including a stator and a substantially cylindrical rotor rotatably supported, the rotor includes two permanent magnets facing each other in a substantially V shape for each magnetic pole, and the two A substantially star-shaped rotation having a rotor core constituting a pole shoe separated for each magnetic pole between permanent magnets and supporting the rotor core constituting the permanent magnet and the pole shoe in the circumferential direction of the rotor A permanent magnet type rotating electrical machine having a core and having side plates on both sides in the axial direction of magnetic poles, which support the rotor core constituting the permanent magnet and the pole shoe in the radial direction of the rotor. 2. The permanent magnet type rotating electric machine according to claim 1, wherein the rotor iron core constituting the pole shoe is supported on side plates on both axial sides by rods penetrating the rotor iron core in the axial direction. The two permanent magnets facing each other in a substantially V shape for each magnetic pole and the rotor core constituting the pole shoe between the two permanent magnets are separate parts, respectively. Permanent magnet type rotating electric machine. A substantially star-shaped rotor core that fixes two permanent magnets facing each other in a substantially V shape for each magnetic pole and a rotor core that constitutes a pole shoe between the two permanent magnets in the circumferential direction of the rotor is 2. The permanent magnet type rotating electric machine according to claim 1, wherein the permanent magnet type rotating electric machine has a shaft and an engagement portion formed by unevenness and is fixedly fitted. The cross section of the two permanent magnets facing each other in a substantially V shape for each magnetic pole is a pentagon in which one corner of a rectangle is obliquely chamfered, and the two permanent magnets are closely contacted by the chamfered portion. The permanent magnet type rotating electric machine according to claim 1. In a permanent magnet type rotating electrical machine in which a magnetic pole is constituted by an open slot stator core and two permanent magnets facing each other in a substantially V shape for each magnetic pole,
The teeth inner peripheral portion has a shape in which the central arc portion and the straight portions on both sides are connected, and the pole shoe outer peripheral portion has a shape in which the central arc portion and the straight portions on both sides are connected. Magnet type rotating electrical machine. The arc part constituting the inner peripheral part of the teeth is a part of a concentric circle common to the arc part constituting the other inner peripheral part of the teeth, and the linear parts on both sides constituting the inner peripheral part of the teeth are perpendicular to the radial direction. The permanent magnet type rotating electric machine according to claim 6, which is a part of a straight line. The arc part constituting the outer periphery of the pole shoe is a part of a concentric circle common to the arc part constituting the other outer periphery of the pole shoe, and the straight parts on both sides constituting the outer periphery of the pole shoe are the end parts of the arc part. 7. The permanent magnet type rotating electric machine according to claim 6, wherein the permanent magnet type rotating electric machine is a straight line connecting corners of the permanent magnet. The permanent magnet type rotating electric machine according to claim 6, wherein the width of the teeth portion of the stator core is constant in the radial direction or is smaller on the inner diameter side.

Images