JP2008271622A - Rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the mechanical strength of a rotor while effectively preventing field system magnetic flux from flowing in the rotor in a short-circuit state in a rotor having stacked magnetic plates and permanent magnets passing through these plates. <P>SOLUTION: A plurality of the magnetic plates 20 are stacked in the rotor. Each magnetic plate 20 has a plurality of first holes 21 arranged in the circumferential direction and second holes 22 positioned at the end of the first holes 21 and at the side of outside circumferential surface 200 than the first holes 21. The permanent magnets 3, which present magnetic pole surfaces parallel to an axis of rotation Q are passed through the first holes 21. The magnetic plates 20 are deformed in the stacking direction at first deformation positions 201 located at the side of the outside circumference surface 200 than the outside circumferential surface 200 side ends of the second holes 22. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for improving magnetic characteristics and mechanical strength of a rotor.

  A rotary electric machine is mainly composed of a stator as an armature and a rotor as a field element. Conventionally, a technique for bending a metal plate constituting the stator has been proposed in order to increase the strength of the portion of the stator that does not allow the magnetic flux to pass therethrough.

JP 2006-67697 A JP-A-11-150892 JP-A-7-298523 "On the magnetic properties of electrical steel sheets at high magnetic flux density" Kaido et al., IEEJ Transactions A, IEEJ (1998), Vol. 118, No. 1029-1033

  However, in the rotor as well as the stator, there is a demand to increase the strength of a portion where the magnetic flux is not desired to pass. In particular, the rotor is provided with a permanent magnet that generates a field magnetic flux, and it is necessary to prevent the field magnetic flux from flowing in a short circuit inside the rotor. This is because the field magnetic flux flowing in a short-circuit manner does not effectively link to the stator and thus does not contribute to torque.

  Accordingly, an object of the present invention is to provide a rotor having a laminated magnetic plate and a permanent magnet inserted therethrough, while effectively preventing the field magnetic flux from flowing in a short circuit inside the rotor while rotating. It is also to increase the mechanical strength of the child.

  The first aspect of the rotor according to the present invention is opposed to the stator (1) through a cylindrical air gap (4) parallel to the rotation axis (Q), and is employed in a rotating electrical machine together with the stator. A plurality of first holes (21), each of which is stacked in a rotation axis direction parallel to the rotation axis, each of which is arranged in a circumferential direction around the rotation axis. And a second hole (22, 22a to 22f) positioned on the stator side of the first hole at the end of the first hole, and more than the end of the second hole on the stator side. A plurality of magnetic plates (20, 28) deforming in the direction of the rotation axis at the first deformation position (201) located on the stator side, and all of them are inserted into the first hole and parallel to the direction of the rotation axis. A plurality of permanent magnets (3) exhibiting a simple magnetic pole surface.

  The 2nd aspect of the rotor concerning this invention is the 1st aspect, Comprising: The said 1st deformation position (201) is the edge nearest to the said stator (1) of the said magnetic plate (2) ( 200).

  A third aspect of the rotor according to the present invention is any one of the first to second aspects, wherein the second hole (22) is a pair of the end portions of the first hole (21). A pair is provided. The first first hole and the second first hole are adjacent to each other, and the magnetic plate (20) is the end of the first hole on the second hole side of the first hole. Between the first second hole provided in the first hole and the second second hole provided at the end of the second hole on the first hole side. Further deformation occurs in the direction of the rotation axis at the second deformation position (202).

  A fourth aspect of the rotor according to the present invention is any one of the first to second aspects, wherein the magnetic plate (20) is arranged in the circumferential direction of each of the second holes (22). Further deformation occurs in the direction of the rotation axis at the second deformation position (202) located at the end.

  The 5th aspect of the rotor concerning this invention is the 4th aspect, Comprising: The said 2nd deformation position (202) is in the said edge part of the one side of the said circumferential direction of the said 2nd hole (22). To position.

  A sixth aspect of the rotor according to the present invention is any one of the fourth to fifth aspects, and is provided on the second hole side of the magnetic plate (20) at the second deformation position (202). An end is rolled in the direction of the rotation axis.

  7th aspect of the rotor concerning this invention is the 4th aspect, Comprising: In each of the said magnetic board (20), the said 2nd hole is a pair of said edge part of the said 1st hole (21) A pair is provided. 1st said 1st hole and 2nd said 1st hole adjoining, and said 1st said provided in the said edge part by the side of said 2nd said 1st hole of said 1st said 1st hole The second deformation position (202) of the second hole (22e; 22f) and the second of the second holes provided at the end of the second hole of the first hole on the first hole side. The second deformation positions of the two holes (22f: 22e) are located on the opposite sides in the circumferential direction. A pair of the second deformation positions of the pair of second holes provided at the pair of end portions of the same first hole are mutually in relation to the pair of second holes in the circumferential direction. Located on the same side. At the second deformation position, an end of the magnetic plate on the second hole side is rolled in the rotation axis direction. The magnetic plates are laminated while being shifted in the circumferential direction at an interval between the first holes.

  An eighth aspect of the rotor according to the present invention is the fourth aspect thereof, wherein, in each of the magnetic plates (20), the second hole is a pair of the end portions of the first hole (21). A pair of the first hole and the second hole are adjacent to each other. The second deformation position (202) of the first second hole (22c; 22d) provided at the end of the first hole on the second hole side of the first hole; The second deformation position of the second second hole (2d; 22c) provided at the end of the second first hole on the first hole side is the circumferential direction. Are located on the same side of each other. A pair of the second deformation positions of the pair of second holes provided at the pair of end portions of the same first hole are mutually in relation to the pair of second holes in the circumferential direction. Located on the opposite side. At the second deformation position, an end of the magnetic plate on the second hole side is rolled in the rotation axis direction. The magnetic plates are laminated while being shifted in the circumferential direction at an interval between the first holes.

  A ninth aspect of the rotor according to the present invention is any one of the first to second aspects, and in each of the magnetic plates (20), the second hole is the first hole (21). A pair of the end portions are provided, and the first first hole and the second first hole are adjacent to each other. The magnetic plate is further deformed in the direction of the rotation axis at the second deformation position (202) of the circumferential end of the second hole provided at the end of the first hole. The second hole provided at the end of the second first hole includes the second hole provided at the end of the first hole and the first deformation position ( 201) and an opening surrounding the second deformation position. The magnetic plates are laminated while being shifted in the circumferential direction at an interval between the first holes.

  A tenth aspect of the rotor according to the present invention is any one of the seventh to ninth aspects, wherein a length that the magnetic plate is rolled in the rotation axis direction at the second deformation position (202) is The thickness is equal to or less than the thickness of the magnetic plate (20).

  An eleventh aspect of the rotor according to the present invention is any one of the first to tenth aspects, in which the magnetic plate (20) has the stator (1) more than the first hole (21). ) On the opposite side to the rotation axis direction.

  A twelfth aspect of the rotor according to the present invention is any one of the first to eleventh aspects, and is laminated with respect to the magnetic plate so as to be positioned in the rotation axis direction than any of the magnetic plates. And an end plate (5) that opens to the magnetic plate at a position where the magnetic plate is deformed in the rotation axis direction and projected along the rotation axis direction.

  A thirteenth aspect of the rotor according to the present invention is any one of the first to eleventh aspects, and of the magnetic plates, at least one of the magnetic plates located at the end in the rotation axis direction. (28) is removed at a position where the other magnetic plate (20) projects along the rotation axis direction at a position where the other magnetic plate (20) is deformed in the rotation axis direction.

  A fourteenth aspect of the rotor according to the present invention is any one of the first to thirteenth aspects, wherein the magnetic plate is a non-oriented electrical steel plate, and the rotating shaft in each of the magnetic plates. In the direction inclined by 45 degrees with respect to the rolling direction of the non-oriented electrical steel sheet when viewed from the side, the space between the adjacent first holes (21) is located.

  In any of the above-described aspects, desirably, the end portion on the second hole side of the magnetic plate is bent in the rotation axis direction at the first deformation position.

  According to the first aspect of the rotor according to the present invention, in addition to increasing the mechanical strength of the rotor, the field magnetic flux generated by the permanent magnet is short-circuited in the rotor near the end of the permanent magnet. Flow is prevented by the second hole serving as a magnetic barrier. Moreover, since the magnetic plate is deformed on the stator side with respect to the second hole, the magnetic resistance at the first deformation position is increased, and the field magnetic flux is also inhibited from bypassing the stator side with respect to the second hole. Therefore, the effect of preventing the short-circuit flow of the field magnetic flux is enhanced.

  According to the 2nd aspect of the rotor concerning this invention, the dimensional accuracy of the edge nearest to a stator of a rotor facing a stator is raised, and the accuracy of an air gap is not impaired.

  According to the third aspect of the rotor according to the present invention, the magnetic resistance of the magnetic path in which the field magnetic flux flows in a short circuit in the rotor near the end of the permanent magnet is further increased.

  According to the fourth aspect of the rotor of the present invention, it is possible to reduce the magnetic resistance of the so-called q-axis magnetic path and increase the q-axis inductance.

  According to the 5th aspect of the rotor concerning this invention, the magnetic flux from the stator at the time of electricity supply is guide | induced to a desirable magnetic path by performing the rotation whose 2nd deformation position side becomes a advancing direction.

  According to the sixth aspect of the rotor according to the present invention, the second deformation position is narrowed to further reduce the magnetic resistance of the q-axis magnetic path.

  According to the seventh, eighth, and ninth aspects of the rotor according to the present invention, the second hole accommodates the deformation of the magnetic body at the second deformation position of the other second hole. Since it can be made substantially perpendicular, the mechanical strength can be further increased even if the amount of rolling is the same.

  According to the tenth aspect of the rotor according to the present invention, the magnetic plates are closely adhered and laminated, and the mechanical strength of the laminated whole is increased.

  According to the eleventh aspect of the rotor of the present invention, the magnetic resistance of the magnetic path through which the field magnetic flux flows in a short circuit in the rotor near the end of the permanent magnet is further increased.

  According to the twelfth aspect of the rotor according to the present invention, the end plate does not interfere with the deformation of the magnetic plate.

  According to the thirteenth aspect of the rotor of the present invention, the magnetic plate at the end does not interfere with the deformation of the magnetic plate.

  According to the fourteenth aspect of the rotor according to the present invention, the magnetic properties in the direction inclined by 45 degrees with respect to the rolling direction of the non-oriented electrical steel sheet are deteriorated. The magnetic resistance of the magnetic path through which the field magnetic flux flows in a short circuit is further increased.

First embodiment.
FIG. 1 is a cross-sectional view showing a rotating electrical machine including a rotor 2 and a stator 1 according to a first embodiment of the present invention. The sectional view shows a section perpendicular to the rotation axis Q of the rotor 2. Normally, the stator 1 is provided with armature windings, but does not characterize the rotor according to the present invention and has a well-known configuration, and is omitted in this specification and drawings. Similarly, a rotating shaft that is connected to the rotor 2 and conducts rotation to the outside and a structure that supports the rotating shaft are also omitted.

  The rotor 2 faces the stator 1 through a cylindrical air gap 4 parallel to the rotation axis Q, and is employed in the rotating electrical machine together with the stator 1.

  The stator 1 includes a yoke 10 and teeth 11. The teeth 11 extend in the radial direction around the rotation axis Q and face the rotor 2. The yoke 10 has an annular shape and connects the teeth 11 on the side opposite to the rotor 2.

  The rotor 2 includes a plurality of magnetic plates 20 stacked in a direction parallel to the rotation axis Q (hereinafter referred to as “rotation axis direction”). Each of the magnetic plates 20 has a plurality of first holes 21 and second holes 22. The first holes 21 are arranged in the circumferential direction around the rotation axis Q. The permanent magnet 3 is inserted into the first hole 21, and the permanent magnet 3 exhibits a magnetic pole surface parallel to the rotation axis direction. The second hole 22 is an end portion of the first hole 21 and is located closer to the stator 1 than the first hole 21.

  The second hole 22 or the end portion of the first hole 21 where the permanent magnet 3 is not inserted also serves as a magnetic barrier so that the field magnetic flux generated by the permanent magnet 3 is the end of the permanent magnet 3. This prevents a short circuit from flowing in the rotating twin in the vicinity of the part.

  In the present embodiment, the first hole 21 has a step in the width for positioning the permanent magnet 3, but the step is not essential in the present invention. The second hole 22 communicates with the first hole 21 but may be separated with a width that allows easy magnetic saturation.

  FIG. 2 is an enlarged cross-sectional view of the vicinity of the outer peripheral surface 200 that is the surface on the stator 1 side of the magnetic plate 20 in FIG. The outer peripheral surface 200 is formed by an edge of the magnetic plate 20 that is closest to the stator 1.

  The first deformation position 201 exists closer to the stator 1 side than the end portion of the second hole 22 on the stator 1 side, where the magnetic plate 20 is deformed in the direction of the rotation axis. Since deformation in the direction of the rotation axis hardly appears in a cross section perpendicular to the rotation axis, it is indicated by a chain line unless otherwise specified.

  FIG. 3 is a cross-sectional arrow view at position AA in FIG. 2 and shows a cross section from the second hole 22 to the outer peripheral surface 200 via the first deformation position 201. In this way, the plurality of magnetic plates 20 exhibit a distortion that is bent in the direction of the rotation axis at the first deformation position 201.

  Conventionally, since no such distortion is provided, a part of the field magnetic flux generated from the permanent magnet 3 flows in a short-circuit manner in the magnetic plate 20 via the stator 1 side rather than the second hole 22. It was. However, according to the present embodiment, the strain at the first deformation position 201 is known to deteriorate the magnetic characteristics of the magnetic material, and the magnetic resistance of the magnetic plate 20 on the stator 1 side with respect to the second hole 22 is reduced. Increase. Accordingly, the field magnetic flux is also prevented from bypassing the stator 1 side with respect to the second hole 22, and thus the effect of preventing the field magnetic flux from being short-circuited is enhanced.

  4 and 5 are distribution diagrams showing the magnetic flux density distribution in the rotating electrical machine. 4 shows the magnetic flux density distribution in the prior art in which no distortion is provided at the first deformation position 201, and FIG. 5 shows the magnetic flux distribution density when distortion is provided at the first deformation position 201.

  4 and 5, reference numerals J0 to J10 indicate regions in which the magnitude of the magnetic flux density is divided by equal magnetic flux density lines. In this reference numeral, the larger the number following the letter “J”, the higher the magnetic flux density. Show.

  As shown in FIG. 4, in the conventional technique, a region J <b> 10 exists on the stator 1 side of the second hole 22. On the other hand, when distortion is provided at the first deformation position 201, the regions J7 to J10 do not exist on the stator 1 side of the second hole 22 as shown in FIG. Therefore, comparing FIG. 4 and FIG. 5, it can be seen that the magnetic flux density is reduced on the stator 1 side of the second hole 22 by providing distortion at the first deformation position 201. Such a decrease in the magnetic flux density is caused by a decrease in the field magnetic flux passing through the stator 1 side of the second hole 22 due to a decrease in the magnetic permeability and saturation magnetic flux density of the magnetic material on the stator 1 side of the second hole 22. Represents.

  Since the stator 1 side of the second hole 22 has been conventionally designed to be thin in order to increase the magnetic resistance at that position, its mechanical strength is weaker than the magnetic plate 20 at other positions. However, providing the strain at the first deformation position 201 improves the mechanical strength of the magnetic plate 20 at this position. In other words, in order to obtain the same mechanical strength, the magnetic body on the stator 1 side of the second hole 22 can be designed to be thinner. In either case, the magnetic flux that is short-circuited without interlinking with the armature can be reduced via the magnetic body on the stator 1 side of the second hole 22.

  That is, according to the present embodiment, the mechanical strength of the rotor 2 is also enhanced while effectively preventing the field magnetic flux from short-circuiting inside the rotor 2.

  However, it is desirable that the first deformation position 201 is away from the outermost periphery of the magnetic plate 20 toward the rotation axis Q. This is because the dimensional accuracy of the outer peripheral surface 200 is increased and the accuracy of the air gap 4 is not impaired.

  FIG. 6 is a graph showing induced voltages according to orders when a rotating electrical machine is used as a generator. The case where distortion is provided at the first deformation position 201 is indicated by a white bar, and the case where no distortion is provided is indicated by a black bar. Looking at the fundamental wave component (first-order component), it is shown that the induced voltage is higher when strain is provided at the first deformation position 201. That is, it is apparent that the induced voltage is increased by providing distortion as in the present embodiment. This is presumably because the field magnetic flux is effectively prevented from flowing in a short circuit inside the rotor 2 and the field magnetic flux linked to the stator 1 is increased.

  FIG. 7 is a sectional view showing a first modification of the present embodiment. One first hole 21 is adjacent to the other first hole 21. The first deformation position 201 includes one of the first holes 21, the second hole 22 provided at the other end of the first hole 21, and the other of the first holes 21. It extends also between the 2nd hole 22 provided in the edge part of the side. Hereinafter, the pair of second holes 22 arranged in this manner is distinguished from the pair of second holes 22 provided at both ends of the same first hole 21 and expressed as “second holes 22 adjacent to each other”.

  FIG. 8 is a sectional view showing a second modification of the present embodiment. In addition to the first deformation position 201, the magnetic body 20 also has a second deformation position 202 between the second holes 22 adjacent to each other. Here, the magnetic plate 20 is further deformed in the direction of the rotation axis. The distortion of the magnetic plate 20 at the second deformation position 202 functions as a magnetic barrier together with the second hole 22. By adopting such a configuration, the magnetic resistance of the magnetic path in which the field magnetic flux flows in a short circuit in the rotor 2 near the end of the permanent magnet 3 is further increased. Further, since the second deformation position 202 is also thin, there is a concern about mechanical strength, but this configuration can increase the mechanical strength.

  FIG. 9 is a cross-sectional view showing a third modification of the present embodiment. In the third deformation, in addition to the second deformation, the magnetic plate 20 is further deformed in the rotation axis direction on the inner peripheral side than the first hole 21. Here, the second deformation position 202 has a Y shape having one end on the stator 1 side and two ends on the opposite side. By adopting such a configuration, the mechanical strength of the magnetic plate 20 at the first deformation position 201 and the second deformation position 202 can be increased, and the field inside the rotor 2 is near the end of the permanent magnet 3. The magnetic resistance of the magnetic path through which the magnetic flux flows in a short circuit is further increased.

  FIG. 10 is a sectional view showing a fourth modification of the present embodiment. This is common to the second and third deformations in that the second deformation position 202 exists between the second holes 22 adjacent to each other. However, in the fourth deformation, the second deformation position 202 is located at each circumferential end of the second hole 22. Thereby, the magnetic resistance of the so-called q-axis magnetic path where the magnetic plate 20 functions between the second holes 22 adjacent to each other can be reduced, and the q-axis inductance can be increased. This is desirable from the viewpoint of utilizing reluctance torque when a rotating electrical machine is employed as an electric motor. The deformation of the magnetic plate 20 at the first deformation position 201 and the deformation of the magnetic plate 20 at the second deformation position 202 may be connected to each other. Thereby, the mechanical strength can be further increased. This can be realized by drawing.

Second embodiment.
FIG. 11 is an enlarged sectional view showing a part of the rotor 2 according to the second embodiment of the present invention. The cross-sectional view shows almost the same position as the first to fourth modifications of the first embodiment.

  The configuration according to the present embodiment is common to the fourth modification of the first embodiment in that the second deformation position 202 is located at each circumferential end of the second hole 22. However, in the present embodiment, the second deformation position 202 is located at one end portion in the circumferential direction of the second hole 22. In FIG. 11, the second deformation position 202 is located on the left side of the second hole 22.

  FIG. 12 is a distribution diagram showing a magnetic flux density distribution when driven counterclockwise in a rotating electrical machine using the rotor 2 having the structure shown in FIG. Reference numerals J0 to J10 have the same meanings as those used in FIGS. In FIG. 11, the magnetic flux density at the first deformation position 201 shown on the left side is reduced to the same extent as in the first embodiment, but the magnetic flux density at the first deformation position 201 shown on the right side is the first. It can be seen that the magnetic flux density is almost the same as in the case where no distortion is provided at the deformation position 201.

  This is suitable when the rotor 2 moves in the counterclockwise direction in FIGS. This is because the magnetic flux from the stator 1 can be guided to a desired magnetic path by performing rotation in which the second deformation position 202 is in the traveling direction. Next, this will be described more specifically.

  FIG. 13 is a cross-sectional view showing the flow of magnetic flux in the rotating electrical machine using the rotor 2 having the structure shown in FIG. The direction of rotation of the rotor 2 is indicated by a white arrow. Moreover, in order to avoid the complexity of illustration, the 1st deformation | transformation position 201 and the 2nd deformation | transformation position 202 are each simplified and shown with the thick line.

  Here, the teeth 11 are located in the vicinity of the second holes 22 adjacent to each other, and function as magnetic poles having N poles. In FIG. 13, the left permanent magnet 3 has an N pole on the teeth 11 side, and the right permanent magnet 3 has an S pole on the teeth 11 side.

  In such a situation, it is desirable that the d-axis component Rd that contributes to the magnet torque in the magnetic flux flows to the permanent magnet 3 on the right side (presenting the S pole). Therefore, as shown in FIG. 12, it is desirable that the magnetic material has no distortion and has a high magnetic permeability and saturation magnetic flux density in the path leading to the stator 1 side of the right permanent magnet 3.

  On the other hand, the q-axis component Rq that contributes to the reluctance torque in the magnetic flux passes through the space between the adjacent second holes 22 and is opposite to the stator 1 of the left permanent magnet 3 (this side includes It is desirable that the permanent magnet 3 flows to the south pole). That is, the q-axis component Rq of the magnetic flux flows along the edge on the traveling side in the rotation direction through the magnetic plate 20 between the adjacent second holes 22. Therefore, it is desirable that the portion of the magnetic plate 20 along the edge on the traveling side in the rotational direction has no distortion and has a high magnetic permeability and saturation magnetic flux density. Therefore, as understood from FIG. 12, it is desirable that the magnetic flux hardly flows to the vicinity of the left first deformation position 201 from the viewpoint of increasing the q-axis component Rq and the d-axis component Rd.

  It is desirable that the end of the magnetic plate 20 on the second hole 22 side in the first deformation position 201 and the second deformation position 202 bend in the rotation axis direction. In particular, realizing the deformation in the rotation axis direction at the second deformation position 202 by turning in the rotation axis direction at the end on the second hole 22 side realizes the second deformation position 202 narrowly. This is advantageous in that the portion where the magnetic plate 20 is deformed in the q-axis magnetic path is made as narrow as possible, so that the magnetic resistance of the q-axis magnetic path is reduced and the contribution to the reluctance torque is not impaired.

  FIG. 14 is a cross-sectional view of the rotor 2 showing a case where the deformation in the rotation axis direction is realized by the above-described bending, and shows the vicinity of the second holes 22 adjacent to each other in an enlarged manner. Since the curl is performed at the end on the second hole 22 side, the first deformation position 201 and the second deformation position 202 indicated by a chain line are also shown in contact with the second hole. Note that it is preferable that the bending of the magnetic plate 20 at the first deformation position 201 and the bending of the magnetic plate 20 at the second deformation position 202 are continuous with each other because the mechanical strength is further increased.

  FIG. 15 is a sectional view taken at the position BB in FIG. 14 and shows a cross section from the second hole 22 to the outer peripheral surface 200 via the first deformation position 201. As described above, the plurality of magnetic plates 20 exhibit a strain that is aligned in the direction of the rotation axis at the first deformation position 201.

Third embodiment.
FIG. 16 is an enlarged plan view showing a part of the rotor according to the third embodiment of the present invention. The plan view shows substantially the same position as the first to fourth modifications of the first embodiment when viewed from the rotation axis direction.

  The configuration according to the present embodiment can be used in combination with either the first embodiment or the second embodiment. The rotor includes an end plate 5. The end plate 5 is laminated on the magnetic plate 20 so as to be positioned more in the rotation axis direction than any of the magnetic plates 20.

  FIG. 17 is a side view schematically showing such a laminated structure, in which the end plate 5 is above the magnetic plate 20 and the end plate 6 is magnetic below the magnetic plate 20 laminated in the rotation axis direction. It is laminated on the plate 20.

  The end plate 5 opens to the magnetic plate 20 at a position where the first deformation position 201 and the second deformation position 202 where the magnetic plate 20 is deformed in the rotation axis direction are projected along the rotation axis direction. If such an end plate 5 is used, the function of the end plate can be obtained without interfering with the deformation of the magnetic plate 20.

  As shown in FIGS. 3 and 15, the deformation of the magnetic plates 20 can be realized only on one side in the rotation axis direction, so that the interval between the stacked magnetic plates 20 can be reduced. Therefore, the end plate 5 is provided on the side where the magnetic plate 20 is deformed, and the end plate 6 provided on the side opposite to the side to be deformed can employ a configuration that is normally employed. In addition, in order to share components, the same end plate as the end plate 5 may be used on the side opposite to the side to be deformed.

  Here, although the mode in which the opening 51 penetrates in the rotation axis direction and exposes the second deformation position 202 is illustrated, it may be a recess that opens to the magnetic plate 20 side without penetrating. Further, the end plate 5 has an outer peripheral surface 50 on the stator 1 side, and when the end plate 5 retreats to the inner peripheral side from the outer peripheral surface 200, an opening is formed at a position where the first deformation position 201 is projected along the rotation axis direction. is doing. However, even if the outer peripheral surface 50 does not necessarily recede to the inner peripheral side from the outer peripheral surface 200, the first deformation position 201 may be penetrated in the rotation axis direction at a position projected along the rotation axis direction. A recess that opens to the magnetic plate 20 side may be provided.

  Here, the case where three are provided between the second holes adjacent to each other (hidden in the end plate 5) as the second deformation position 202 is exemplified, but of course, the number is arbitrary, As shown in FIG. 2, the second deformation position may not be provided. The end plate is additionally provided with a hole through which a pin for caulking them is placed at the same position as the magnetic body.

  The same effect can be obtained even if one of the laminated magnetic plates located at the end in the rotation axis direction is configured differently from the other magnetic plates. FIG. 18 is a plan view showing a state in which the magnetic plate 28 located at the end in the rotation axis direction is overlapped with another magnetic plate 20. However, when the height at which the magnetic plate 20 is rolled in the rotation axis direction is higher than the thickness of one magnetic plate 28, it is desirable to provide a plurality of magnetic plates 28. Even if the magnetic plate 28 opened as described above with respect to the magnetic plate 20 is used, if only one of the magnetic plates is provided, the bending of the magnetic plate 20 protrudes from the magnetic plate 28 in the rotation axis direction. It is.

  The magnetic plate 28 also has the first hole 21, but has a third hole 27 instead of the second hole 22. The third hole 27 is realized by removing the magnetic plate 28 at a position where the position where the magnetic plate 20 is deformed in the rotation axis direction is projected along the rotation axis direction. Here, the first deformation position 201, the second deformation position 202 and the second hole 22 of the magnetic plate 20 appear through the third hole 27 of the magnetic plate 28. In this way, the magnetic plate 28 does not interfere with the deformation of the magnetic plate 20. Therefore, the end plate 5 different from the end plate 6 may not be provided.

  Similar to the second hole 22, the third hole 27 also functions as a magnetic barrier that inhibits the short-circuit flow of the field magnetic flux generated by the permanent magnet 3.

  FIG. 19 is a side view schematically showing the laminated structure of the rotor 2 when the magnetic plate 28 is used. The magnetic plate 28 is located above the magnetic plate 20 laminated in the rotation axis direction. And a normal end plate 6 is further laminated thereon. An end plate 6 is laminated on the magnetic plate 20 at the lower end in the rotation axis direction.

  As shown in FIGS. 3 and 15, the deformation of the magnetic plates 20 can be realized only on one side in the rotation axis direction, so that the interval between the stacked magnetic plates 20 can be reduced. In this case, the magnetic plate 28 only needs to be provided on the side where the magnetic plate 20 is deformed, and the end plate 6 at both ends can employ a configuration that is normally employed.

Fourth embodiment.
FIG. 20 is a plan view showing a magnetic plate 20 constituting a rotor according to a fourth embodiment of the present invention. In FIG. 20, the 2nd hole 22a is provided in the both ends of the 1st hole 21 arrange | positioned at upper left and lower right, and the 1st deformation position 201 and the 2nd deformation position 202 are arrange | positioned around it. In FIG. 20, the 2nd hole 22b is provided in the both ends of the 1st hole 21 arrange | positioned at the lower left and upper right. The second hole 22b opens in a size surrounding the second hole 22a and the first and second deformation positions 201 and 202 around the second hole 22a.

  That is, a second hole 22 a is provided at both ends of one adjacent first hole 21, and a second hole 22 b is provided at both ends of the other first hole 21. The first deformation position 201 and the second deformation position 202 are arranged around the second term 22a.

  Accordingly, the magnetic plates 20 shown in FIG. 20 are laminated at the intervals of the first holes 21 in the circumferential direction and shifted by 90 degrees here, so that the magnetic plates at the first deformation position 201 and the second deformation position 202 are stacked. The deformation of 20 is accommodated in the second hole 22 b of the other magnetic plate 20. Therefore, since the angle at which the magnetic body 20 is bent can be made substantially perpendicular, the mechanical strength of the rotor 2 can be increased even if the amount of bending is the same.

  FIG. 21 is a perspective view showing a state in which two magnetic plates 20 having the configuration shown in FIG. 20 are stacked with a 90-degree shift and cut in the vicinity of the second holes 22a and 22b. Here, a case is shown in which the deformation of the magnetic plate 20 at the first deformation position 201 and the second deformation position 202 is realized by bending at the end of the second hole 22a. In order for the magnetic plate 20 to be stacked in close contact with the rotation axis direction, the length m of the magnetic plate 20 sandwiching in the rotation axis direction is preferably equal to or less than the thickness t of the magnetic plate 20.

Fifth embodiment.
FIG. 22 is a plan view showing the structure of the magnetic plate 20 laminated in the rotor according to the fifth embodiment of the present invention. In the magnetic plate 20, the second deformation positions 202 of the second holes 22c and 22d adjacent to each other are located on the same side in the circumferential direction. Moreover, the second deformation positions 202 of the second holes 22c provided at both ends of the first hole 21 arranged at the upper left and lower right in FIG. 22 are located on the side far from the first hole 21, and in the circumferential direction. Located on opposite sides of each other. Further, in FIG. 22, the second deformation positions 202 of the second holes 22d provided at both ends of the first hole 21 arranged at the lower left and upper right are located on the side close to the first hole 21, and are opposite in the circumferential direction. Located on the side. At the second deformation position 202, the magnetic plate 20 is rolled in the direction of the rotation axis at the end on the second hole 22c, 22d side.

  By laminating the magnetic plate 20 at intervals between the first holes 21 in the circumferential direction, the deformation of the magnetic plate 20 is accommodated in the second holes 22c and 22d as in the fourth embodiment.

  FIG. 23 is a cross-sectional view showing a cross section obtained by cutting the second holes 22c and 22d adjacent to each other in a substantially circumferential direction. The length m that the magnetic plate 20 is rolled in the rotation axis direction is equal to or less than the thickness t of the magnetic plate 20, and the bending of the magnetic plate 20 at the end of the second hole 22 c is accommodated in the second hole 22 d of the other magnetic plate 20. Is appearing. Similarly, the bending of the magnetic plate 20 at the end of the second hole 22 d is accommodated in the second hole 22 c of the other magnetic plate 20.

  FIG. 24 is a plan view showing another structure of the magnetic plate 20 laminated in the rotor according to the fifth embodiment of the present invention. In the magnetic plate 20, the second deformation positions 202 of the second holes 22e and 22f adjacent to each other are located on the opposite sides in the circumferential direction.

  Moreover, the second deformation positions 202 of the second holes 22e provided at both ends of the first holes 21 arranged at the upper left and lower right in FIG. 24 are both located in the clockwise direction, and are mutually in the circumferential direction. Located on the same side. In FIG. 24, the second deformation positions 202 of the second holes 22f provided at both ends of the first holes 21 arranged at the lower left and upper right in FIG. 24 are all located on the counterclockwise direction side, and the same side in the circumferential direction. Located in. At the second deformation position 202, the magnetic plate 20 is rolled in the direction of the rotation axis at the end on the second hole 22e, 22f side.

  By laminating the magnetic plate 20 at intervals between the first holes 21 in the circumferential direction, the deformation of the magnetic plate 20 is accommodated in the second holes 22e and 22f, as in the fourth embodiment.

  As described above, in the present embodiment as well, as with the fourth embodiment, the angle at which the magnetic plate 20 turns can be made substantially perpendicular, and the mechanical strength of the rotor 2 can be increased.

Sixth embodiment.
This embodiment can be used in combination with any of the first to fifth embodiments. Here, a non-oriented electrical steel sheet is adopted as the magnetic plate 20.

  FIG. 25 is a plan view showing the relationship between the positions of the first holes 21 and the second holes 22 in the magnetic plate 20 and the rolling directions T1 and T2. A space between the second holes 22 adjacent to each other is positioned in the direction inclined by 45 degrees with respect to the rolling direction T1, as viewed from the rotation axis Q, and the direction T2 orthogonal thereto. That is, the space between the adjacent first holes 21 is located.

  As known from Non-Patent Document 1 and the like described above, the magnetic properties in the direction inclined by 45 degrees with respect to the rolling direction of the non-oriented electrical steel sheet are generally deteriorated. Therefore, the magnetic resistance at the end of the first hole 21 can be increased, and the magnetic resistance of the magnetic path through which the field magnetic flux flows in a short circuit in the rotor near the end of the permanent magnet can be increased.

  The features in any of the above embodiments can be combined with the features of the other embodiments as long as the features of the other embodiments are not impaired. In addition, it is desirable that the laminated magnetic plates are caulked with “Karamase”. This “Karamase” is formed by fixing magnetic plates to be laminated together by fitting unevennesses that are partially broken without being punched. At this time, it is also possible to share part of the Karamase as a deformation of the magnetic plate.

  In the above-described embodiment, the inner rotor type structure has been mainly described. However, the present invention can also be applied to an outer rotor type structure. In that case, not the outer peripheral surface 200 but the inner peripheral surface faces the stator 1 side.

It is sectional drawing which shows the rotary electric machine provided with the rotor concerning 1st Embodiment of this invention, and a stator. It is sectional drawing to which the outer peripheral surface vicinity of the magnetic board was expanded. It is a cross-sectional arrow view in the position AA of FIG. It is a distribution map which shows magnetic flux density distribution in a rotary electric machine. It is a distribution map which shows magnetic flux density distribution in a rotary electric machine. It is a graph which shows the induced voltage at the time of using a rotary electric machine as a generator according to order. It is sectional drawing which shows the 1st modification of this Embodiment. It is sectional drawing which shows the 2nd deformation | transformation of this Embodiment. It is sectional drawing which shows the 3rd deformation | transformation of this Embodiment. It is sectional drawing which shows the 4th deformation | transformation of this Embodiment. It is sectional drawing which expands and shows some rotors concerning 2nd Embodiment of this invention. It is sectional drawing which shows the flow of the magnetic flux in the rotary electric machine using the rotor concerning the 2nd Embodiment of this invention. It is sectional drawing which shows the flow of the magnetic flux in the rotary electric machine using the rotor concerning the 2nd Embodiment of this invention. It is sectional drawing of the rotor which shows the case where the deformation | transformation of the rotating shaft direction of a magnetic board is implement | achieved by the bending. It is a cross-sectional arrow view in the position BB of FIG. It is a top view which expands and shows some rotors concerning the 3rd Embodiment of this invention. It is a side view which shows typically the laminated structure of the rotor concerning the 3rd Embodiment of this invention. It is a top view which shows the state which piled up the magnetic plate located in the end in the rotating shaft direction with the other magnetic plate. It is a side view which shows typically the laminated structure of the rotor concerning the 3rd Embodiment of this invention. It is a top view which shows the magnetic board which comprises the rotor concerning the 4th Embodiment of this invention. It is a perspective view which shows the state which laminated | stacked two magnetic plates 90 degree | times, cut | disconnected in the 2nd hole vicinity. It is a top view which shows the structure of the magnetic board laminated | stacked in the rotor concerning the 5th Embodiment of this invention. It is sectional drawing which shows the cross section which cut | disconnected between the 2nd holes adjacent to each other in the substantially circumferential direction. It is a top view which shows the other structure of the magnetic board laminated | stacked in the rotor concerning the 5th Embodiment of this invention. It is a top view which shows the relationship between the position of the 1st hole and 2nd hole in a magnetic plate, and a rolling direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 20, 28 Magnetic board 201 1st deformation position 202 2nd deformation position 21 1st hole 22, 22a-22f 2nd hole 5 End plate

Claims (15)

A rotor (2) which is opposed to the stator (1) via a cylindrical air gap (4) parallel to the rotation axis (Q) and is employed in a rotating electric machine together with the stator,
Laminated in the direction of the rotation axis, which is a direction parallel to the rotation axis, each of which is a plurality (21) of first holes arranged in the circumferential direction around the rotation axis, and the end of the first hole. A first deformation that has a second hole (22, 22a to 22f) positioned on the stator side with respect to the first hole and is positioned on the stator side with respect to an end portion on the stator side of the second hole. A plurality of magnetic plates (20, 28) deformed in the rotational axis direction at a position (201);
A plurality of permanent magnets (3) each of which is inserted into the first hole and presents a magnetic pole surface parallel to the rotation axis direction;
Rotor with.   The rotor according to claim 1, wherein the first deformation position (201) is separated from an edge (200) closest to the stator (1) of the magnetic plate (2). A pair of the second holes (22) are provided at a pair of the end portions of the first hole (21),
The first first hole and the second first hole are adjacent to each other;
The magnetic plate (20) includes the first second hole provided at the end of the first first hole on the second hole side, and the second first. 2. Further deformation in the direction of the rotation axis at a second deformation position (202) between the second hole and the second hole provided at the end of the hole on the first hole side. Or the rotor of Claim 2.   The said magnetic plate (20) further deform | transforms in the said rotating shaft direction at the 2nd deformation position (202) located in the edge part of the said circumferential direction of each said 2nd hole (22). The rotor according to 2.   The rotor according to claim 4, wherein the second deformation position (202) is located at the end portion on one side in the circumferential direction of the second hole (22).   The rotor according to claim 4 or 5, wherein an end of the magnetic plate (20) on the second hole side in the second deformation position (202) is rolled in the rotation axis direction. In each of the magnetic plates (20),
A pair of the second holes are provided at a pair of the end portions of the first hole (21),
The first first hole and the second first hole are adjacent to each other;
The second deformation position (202) of the first second hole (22e; 22f) provided at the end of the first hole on the second hole side of the first hole; The second deformation position of the second second hole (22f: 22e) provided at the end of the second first hole on the first hole side is the circumferential direction. Located on opposite sides of each other,
A pair of the second deformation positions of the pair of second holes provided at the pair of end portions of the same first hole are mutually in relation to the pair of second holes in the circumferential direction. Located on the same side,
In the second deformation position, an end of the magnetic plate on the second hole side is rolled in the rotation axis direction,
The rotor according to claim 4, wherein the magnetic plates are stacked while being shifted at intervals of the first holes in the circumferential direction. In each of the magnetic plates (20),
A pair of the second holes are provided at a pair of the end portions of the first hole (21),
The first first hole and the second first hole are adjacent to each other;
The second deformation position (202) of the first second hole (22c; 22d) provided at the end of the first hole on the second hole side of the first hole; The second deformation position of the second second hole (2d; 22c) provided at the end of the second first hole on the first hole side is the circumferential direction. Located on the same side of each other
A pair of the second deformation positions of the pair of second holes provided at the pair of end portions of the same first hole are mutually in relation to the pair of second holes in the circumferential direction. Located on the opposite side
In the second deformation position, an end of the magnetic plate on the second hole side is rolled in the rotation axis direction,
The rotor according to claim 4, wherein the magnetic plates are stacked while being shifted at intervals of the first holes in the circumferential direction. In each of the magnetic plates (20),
A pair of the second holes are provided at a pair of the end portions of the first hole (21),
The first first hole and the second first hole are adjacent to each other;
The magnetic plate is further deformed in the rotational axis direction at the second deformation position (202) of the circumferential end of the second hole provided at the end of the first hole,
The second hole provided at the end of the second first hole includes the second hole provided at the end of the first hole and the first deformation position ( 201) and an opening surrounding the second deformation position,
The rotor according to claim 1, wherein the magnetic plates are stacked while being shifted in the circumferential direction at an interval between the first holes.   10. The length according to claim 7, wherein the length at which the magnetic plate is rolled in the rotation axis direction at the second deformation position (202) is equal to or less than the thickness of the magnetic plate (20). Rotor.   The said magnetic plate (20) is further deform | transformed in the said rotating shaft direction on the opposite side to the said stator (1) rather than the said 1st hole (21). Rotor. The magnetic plate is positioned in the direction of the rotation axis from any of the magnetic plates and is laminated on the magnetic plate, and the magnetic plate is projected at a position along the rotation axis direction where the magnetic plate is deformed in the direction of the rotation axis. End plate opening to the plate (5)
The rotor according to any one of claims 1 to 11, further comprising:   Among the magnetic plates, at least one of the magnetic plates (28) located at the end most in the rotation axis direction has a position in which the other magnetic plate (20) is deformed in the rotation axis direction in the rotation axis direction. The rotor according to claim 1, which is removed at a position projected along the rotor. The magnetic plate is a non-oriented electrical steel plate,
In each of the magnetic plates,
14. Any one of claims 1 to 13, wherein a space between the adjacent first holes (21) is located in a direction inclined by 45 degrees with respect to a rolling direction of the non-oriented electrical steel sheet when viewed from the rotation axis. The rotor as described in one.   The rotor according to any one of claims 1 to 14, wherein an end of the magnetic plate on the second hole side in the first deformation position is rolled in the rotation axis direction.

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