JP2010226937A - Core member for rotating machine and rotating machine - Google Patents

Core member for rotating machine and rotating machine Download PDF

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Publication number
JP2010226937A
JP2010226937A JP2009074634A JP2009074634A JP2010226937A JP 2010226937 A JP2010226937 A JP 2010226937A JP 2009074634 A JP2009074634 A JP 2009074634A JP 2009074634 A JP2009074634 A JP 2009074634A JP 2010226937 A JP2010226937 A JP 2010226937A
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Prior art keywords
core
yoke
rotating machine
magnet
magnetic flux
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JP2009074634A
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Japanese (ja)
Inventor
Matahiro Nakae
Hiroshi Sachi
Nobuyuki Shinpo
Takamitsu Tsuna
亦鴻 中江
洋 幸
信之 眞保
隆満 綱
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Tdk Corp
Tdk株式会社
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Priority to JP2009074634A priority Critical patent/JP2010226937A/en
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Abstract

The efficiency of a three-dimensional rotating machine using a split core is improved.
A stator core includes a tooth portion having a magnet facing surface on one side surface (side surface 24b or side surface 24c) in the radial direction and one side surface (side surface 24a or side surface 24d) in the axial direction, and a winding is wound around the stator core. And a plurality of split cores 30 arranged in an annular shape, each of the split cores 30 being made of a soft magnetic metal dust material, and the end of the yoke part 22 of each split core 30 The portion 22a fits into a recess 26 provided in the tooth portion 23 of the adjacent split core 30, and the yoke portion 22 has one end surface in the axial direction or one side surface in the radial direction of the end portion 22a. A columnar body having a shape in which at least a part of the portion facing both is rounded off.
[Selection] Figure 4

Description

  The present invention relates to a core member for a rotating machine and a rotating machine, and more particularly to a core member for a three-dimensional rotating machine having a magnet facing surface in both a radial direction and an axial direction, and a rotating machine using the core member.
  A rotating machine generally includes a stator core and a rotor. The stator core is a laminated body (laminated steel sheet) of silicon steel sheets, and a coil is wound thereon. On the other hand, a permanent magnet is disposed on the rotor. The permanent magnet of the rotor and the stator core are arranged to face each other with a minute gap (gap).
  When using a rotating machine as a generator, the rotor is rotated by an external force. Then, since the positional relationship between the permanent magnet and the stator core varies, the interlinkage magnetic flux of the coil varies and a voltage is generated. On the other hand, when the rotating machine is used as an electric motor, an alternating current is passed through the coil. Then, the magnetic field inside the stator core fluctuates, and a rotational torque is generated in the rotor by the interaction between the fluctuating magnetic field and the permanent magnet.
  Patent Document 1 discloses an example of an electric motor. The electric motor disclosed in Patent Document 1 is a so-called radial electric motor in which a gap between a stator core and a rotor is provided in the radial direction, and permanent magnets are arranged on both the inner peripheral side and the outer peripheral side of the stator core. By arranging the permanent magnets on both sides of the stator core in the radial direction in this way, the amount of usable magnetic flux is increased compared with the case where the permanent magnets are arranged only on one side, and the efficiency of the electric motor is improved.
  Moreover, in the electric motor disclosed in Patent Document 1, the stator core is composed of a plurality of divided cores. Each split core has a hook-shaped locking portion and a groove portion, and the split core is annularly connected by press-fitting the locking portion into the groove portion to constitute an integral stator core.
JP-A-10-271784
  By the way, if permanent magnets are arranged not only in the radial direction of the stator core but also in the axial direction (rotational axis direction of the rotor), the amount of available magnetic flux increases, and the output density and efficiency of the rotating machine are improved. Hereinafter, such a rotating machine is referred to as a three-dimensional rotating machine.
  Even in a three-dimensional rotating machine, it may be desired to use a split core in the same manner as the electric motor disclosed in Patent Document 1 from the viewpoint of simplifying the winding work. However, when the split core is used, a large magnetic resistance is generated at the connecting portion of the split core. Therefore, the efficiency is deteriorated as compared with the case where the split core is not used, and the efficiency improvement effect due to the three-dimensionalization is impaired.
  Therefore, one of the objects of the present invention is to provide a core member that can improve the efficiency of a three-dimensional rotating machine that uses a split core, and a rotating machine that uses this core member.
  In order to achieve the above object, a core member for a rotating machine according to the present invention includes a tooth portion having a magnet facing surface on one side surface in the radial direction and one side surface in the axial direction, and a rod-shaped yoke portion around which the winding is wound. Each of the divided cores is made of a soft magnetic metal dust material, and an end of the yoke portion of each divided core is adjacent to the divided core. The yoke portion is engaged with at least part of the end portion facing the one side surface in the axial direction or the one side surface in the radial direction. It is characterized in that at least a part of or both of the parts to be formed are columnar bodies having a shape that is R-chamfered.
  According to the present invention, the magnetic resistance of the connecting portion of the split core can be reduced with respect to the magnetic flux entering and exiting the split core through one side surface in the axial direction, one side surface in the radial direction, or both. Can improve the efficiency.
  Further, in each of the core members for a rotating machine, the teeth portion of each of the divided cores has a magnet facing surface on at least one of the other side surface in the radial direction or the other side surface in the axial direction, and the yoke portion is The columnar body to be formed may have a shape in which at least a part of the end portion facing the at least one of the other side surface in the radial direction or the other side surface in the axial direction is also chamfered. . According to this, it is possible to reduce the magnetic resistance of the connecting portion of the split core with respect to the magnetic flux entering and leaving the split core through the other side surface in the radial direction.
  In the core member for a rotating machine, the columnar body constituting the yoke part may not have a side at least at the end part, and the end part may be constituted only by a curved surface.
  In the core member for a rotating machine, the end portion may be a hemispherical shape, and the columnar body constituting the yoke portion is a cylindrical body having the hemispherical end portion. Also good.
  A rotating machine according to the present invention includes any one of the above core members for each rotating machine and a magnet support member having a permanent magnet facing each magnet facing surface of each of the divided cores.
  ADVANTAGE OF THE INVENTION According to this invention, the efficiency of the three-dimensional rotary machine using a split core can be improved.
It is a schematic diagram (schematic diagram) of a sectional view of the rotating machine according to the embodiment of the present invention cut in the axial direction. The stator core portion in (a) corresponds to the cross section along line AA ′ in FIG. 3, and the stator core portion in (b) corresponds to the cross section along line BB ′ in FIG. It is the perspective view which extracted and described only the magnet, the stator core, and the coil from the rotary machine shown in FIG. It is the perspective view which extracted and described only the stator core from the rotary machine shown in FIG. (A) (b) is the figure which expanded and showed the division | segmentation core of the stator core of the rotary machine by embodiment of this invention. It is a schematic diagram of the CC 'line cross section of FIG. FIG. 3 is a perspective transparent view of a split core which is a premise of the present invention. It is a schematic diagram for demonstrating the flow of the magnetic flux in the rotary machine by embodiment of this invention. (A)-(c) is a figure which shows the connection state of the split core used as the premise of this invention shown in FIG. (A) is sectional drawing of the division | segmentation core used as the premise of this invention along the D line of Fig.8 (a). (B) (d) (f) is sectional drawing of the division | segmentation core used as the premise of this invention along the E line of FIG.8 (b). (C) (e) is sectional drawing of the division | segmentation core used as the premise of this invention along the F line of FIG.8 (c). (A)-(f) is sectional drawing of the split core by embodiment of this invention corresponding to FIG. 9 (a)-(f), respectively. (A)-(f) is a perspective view which shows the yoke part by the modification of embodiment of this invention. (A) And (b) is a figure which shows the example of sectional drawing of the three-dimensional rotary machine which made the upper surface, lower surface, and outer peripheral surface of the stator core the magnet opposing surface. (A) And (b) is a perspective view which shows the variation of the shape of a yoke part.
  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  1A and 1B are schematic views (schematic diagrams) of cross-sectional views of the three-dimensional rotating machine 1 according to the present embodiment cut in the axial direction. FIG. 2 is a perspective view in which only the magnets 13 a to 13 c, the stator core 21, and the coil 25 are extracted from the three-dimensional rotating machine 1. FIG. 3 is a perspective view in which only the stator core 21 is extracted from the three-dimensional rotating machine 1. 1A and 1B correspond to the AA ′ line cross section of FIG. 3 and the BB ′ line cross section of FIG. 3, respectively.
  As shown in FIG. 1, the three-dimensional rotating machine 1 is fixed to a shaft 10 and a rotor 11 (magnet support member) configured to be rotatable around the X axis shown in FIG. And a stator core 21 (core member). The three-dimensional rotating machine 1 is used for various purposes such as a printer, a fan, an in-vehicle motor, and a washing machine.
  The base 20 has a cylindrical portion 20a at the center, and the shaft 10 is inserted into the cylindrical portion 20a. The shaft 10 is supported by two bearings 40 fitted to the inner wall of the cylindrical portion 20a, and rotates along the inner periphery of the bearing 40 with the X axis as a rotation axis.
  The rotor 11 is a member including a disk-shaped portion 11a having a main surface perpendicular to the X axis, and is made of a magnetic material such as iron. The central part of the disk-shaped part 11 a is fitted with the shaft 10, whereby the rotor 11 rotates together with the shaft 10.
  Two cylindrical portions 11b and 11c are provided at the lower portion of the disk-shaped portion 11a. The centers of the cylindrical portions 11b and 11c are all coincident with the X axis. The inner diameter of the cylindrical portion 11b is larger than the outer diameter of the cylindrical portion 20a of the base 20, and the cylindrical portion 20a is inserted inside the cylindrical portion 11b. The inner diameter of the cylindrical portion 11c is larger than the outer diameter of the cylindrical portion 11b, and the stator core 21 is inserted into an annular (doughnut-shaped) space formed between the cylindrical portion 11b and the cylindrical portion 11c. Is done.
  The inner surfaces 12a, 12b, and 12c of the annular space are opposed surfaces that face the upper surface 24a, inner peripheral surface 24b, and outer peripheral surface 24c (described later) of the stator core 21, respectively. A predetermined number (10 in FIG. 2) of magnets 13a are installed on the inner surface 12a. Similarly, the same number (10 in FIG. 2) of magnets 13b and 13c are installed on the inner surface 12b and the inner surface 12c, respectively.
  The magnet 13a is a fan-shaped permanent magnet as shown in FIG. 2, and has a permanent magnet 13a (S) whose south pole faces the stator core 21 and a permanent magnet 13a (N) whose north pole faces the stator core 21. Including. The permanent magnets 13a (S) and the permanent magnets 13a (N) are alternately arranged in the circumferential direction. In FIG. 2, “N” is written on the surface of the permanent magnet 13 a (S), and “S” is written on the surface of the permanent magnet 13 a (N). This is the surface on the inner surface 12 a side of each permanent magnet 13 a. The magnetic poles appearing in are shown. The same applies to magnets 13b and 13c described below.
  As shown in FIG. 2, the magnet 13b is a permanent magnet having a shape obtained by cutting a part of a cylinder. The magnet 13b has a permanent magnet 13b (S) with the south pole facing the stator core 21 and the north pole facing the stator core 21. Permanent magnet 13b (N). The permanent magnets 13b (S) and the permanent magnets 13b (N) are alternately arranged in the circumferential direction at positions corresponding to the permanent magnets 13a (S) and the permanent magnets 13a (N), respectively.
  As shown in FIG. 2, the magnet 13 c is also a permanent magnet having a shape obtained by cutting a part of a cylinder, the permanent magnet 13 c (S) with the south pole facing the stator core 21, and the north pole facing the stator core 21. Permanent magnet 13c (N). The permanent magnets 13c (S) and the permanent magnets 13c (N) are alternately arranged in the circumferential direction at positions corresponding to the permanent magnets 13a (S) and the permanent magnets 13a (N), respectively.
  The stator core 21 is an annular member, and has a structure in which a plurality of divided cores 30 arranged in an annular shape along the circumferential direction are connected as shown in FIGS. 2 and 3. Each divided core 30 is formed by molding, under a predetermined pressure, a soft magnetic metal dust material in which the surface of the powder particles is electrically insulated by a predetermined insulating film. Thus, since it is comprised with the soft-magnetic metal powder compact material, there is no restriction | limiting of the passage direction of magnetic flux in the split core 30.
  FIG. 4A is a perspective view in which two split cores 30 are extracted from the stator core 21 shown in FIG. However, in the same figure, the state before connecting the split core 30 is shown. FIG. 4B is an enlarged perspective view showing one divided core 30 in an enlarged manner. FIG. 5 is a schematic diagram of a cross section taken along the line CC ′ of FIG. However, FIG. 5 also shows only two divided cores 30.
  As shown in FIGS. 4A and 4B, each divided core 30 has a yoke portion 22 and a teeth portion 23.
  As shown in FIG. 3 and the like, the teeth portion 23 includes an upper protruding portion 23a protruding upward, an inner protruding portion 23b protruding inward, an outer protruding portion 23c protruding outward, and a lower protruding lower portion. And a side protrusion 23d. Of these, the lower projection 23d is fixed to the base 20 as shown in FIG.
  The upper surface 24a (one side surface in the axial direction) of the upper protrusion 23a, the inner peripheral surface 24b (one side surface in the radial direction) of the inner protrusion 23b, and the outer peripheral surface 24c (the other side surface in the radial direction) of the outer protrusion 23c are respectively It is a magnet facing surface facing the magnet 13a, the magnet 13b, and the magnet 13c. Each of these surfaces has a shape along the opposing magnet, whereby a constant width gap is provided between each surface and each magnet.
  As shown in FIG. 3, the inner protrusion 23 b has a flange 23 bf that projects in the direction of the adjacent yoke 22. Similarly, the outer protrusion 23c also has a flange 23cf projecting in the direction of the adjacent yoke 22. These flange portions 23bf and 23cf are provided to increase the area of the inner peripheral surface 24b and the outer peripheral surface 24c, and thereby the amount of magnetic flux taken into the stator core 21 is increased.
  On one side surface 24e in the circumferential direction of the tooth portion 23, as shown in FIG. 4 (a), a concave portion 26 that fits with the yoke portion 22 of the adjacent divided core 30 is provided. The recess 26 is a hemispherical hole provided in the side surface 24e.
  On the other hand, as shown in FIG. 4B, the yoke portion 22 is a columnar member protruding from the other side surface 24 f in the circumferential direction of the teeth portion 23, and the coil 25 is wound via an insulating bobbin 27. Turned. As shown in FIG. 5, the end 22 a of the yoke portion 22 is fitted into a recess 26 provided in the tooth portion 23 of the adjacent split core 30. Note that the end 22a and the recess 26 have a corresponding shape, and are brought into close contact with each other by being fitted. When fitting, it is preferable to use an adhesive so that the split cores 30 are not separated. As a specific adhesive, it is preferable to use a two-component epoxy resin having a relatively strong adhesive strength. It is also preferable to use a magnetic adhesive.
  Hereinafter, the shape of the yoke part 22 and its end part 22a will be described in detail. In the following description, the structure of the split core that is the base of the present invention will be described first, and then the shape of the yoke portion 22 and its end 22a will be described in comparison with the split core.
  FIG. 6 is a perspective transparent view of the split core 130 as a base of the present invention. In the figure, only the yoke portion 122 of one adjacent split core 130 and the tooth portion 123 of the other split core 130 are shown.
  As shown in FIG. 6, also in the split core 130, the teeth portion 123 is provided with magnet facing surfaces 124 a to 124 c. These magnet facing surfaces 124a to 124c are surfaces facing the magnets 13a to 13b, respectively, when the split core 130 is used instead of the split core 30 in FIG. Further, a concave portion 126 that fits with the yoke portion 122 of the adjacent split core 130 is provided on one side surface 124e in the circumferential direction.
  The yoke portion 122 is a quadrangular columnar member, and protrudes from the other side surface 124f of the teeth portion 123 in the circumferential direction, although not shown. Since it is a quadrangular prism shape, the yoke part 122 has sides (edges) E1 to E8 as shown in FIG.
  Now, the shape of the yoke portion 22 and its end 22a will be described in comparison with the yoke portion 122 as described above. As shown in FIG. 4, the yoke portion 22 is a cylindrical columnar body (a columnar body having a circular cross section perpendicular to the longitudinal direction), and its end 22 a has a hemispherical shape. This shape is a shape obtained by chamfering the edges E1 to E8 in the yoke portion 122. That is, the yoke portion 22 is a columnar body having a shape in which the sides E1 to E8 of the yoke portion 122 are chamfered.
  In addition, although the shape of the yoke part 22 shown in FIG. 4 and its edge part 22a is made into the shape formed by completely curving the sides E1-E8, it is good also as a shape formed only by carrying out R chamfering. This point will be described in detail again after explaining the flow of magnetic flux later.
  Next, the flow of magnetic flux in the three-dimensional rotating machine 1 will be described.
  FIG. 7 is a schematic diagram for explaining the flow of magnetic flux in the three-dimensional rotating machine 1. In the figure, the flow of magnetic flux is indicated by a broken line with an arrow.
  As indicated by the broken line A, the magnetic flux emitted from the N pole of a certain magnet 13a (N) enters the stator core 21 from the opposed upper surface 24a, and the upper protrusion 23a, the yoke 22, the adjacent upper protrusion 23a, and its It passes through the upper surface 24a in order and returns to the south pole of the adjacent magnet 13a (S).
  Similarly, as indicated by the broken line B, the magnetic flux emitted from the N pole of a certain magnet 13b (N) enters the stator core 21 from the opposed inner peripheral surface 24b, and enters the inner protrusion 23b, the yoke part 22, and the adjacent inner protrusion. It passes through the part 23b and its inner peripheral surface 24b in order, and returns to the S pole of the adjacent magnet 13b (S).
  Further, as indicated by the broken line C, the magnetic flux emitted from the N pole of a certain magnet 13c (N) enters the stator core 21 from the opposed outer peripheral surface 24c, and is provided with the outer protrusion 23c, the yoke part 22, and the adjacent outer protrusion 23c. , And its outer peripheral surface 24c in order, and returns to the S pole of the adjacent magnet 13c (S).
  Thus, in the three-dimensional rotating machine 1, the flow of magnetic flux is ensured in three directions, and all the magnetic flux passes through the yoke portion 22. For this reason, compared with the case where a permanent magnet is arrange | positioned only on both sides of a stator core, for example, the quantity of the magnetic flux which can be utilized has increased.
  The magnetic resistance of the connecting portion of the split core 30 (the connecting portion of the tooth portion 23 and the yoke portion 22) will be described. In the following description, the magnetic resistance of the connecting portion of the split core 130 will be described first, and then the magnetic resistance of the connecting portion of the split core 30 will be described in comparison with the split core 130.
  FIGS. 8A to 8C are diagrams showing the connection state of the split cores 130 shown in FIG. Fig.9 (a) is sectional drawing of the split core 130 along the D line of Fig.8 (a). Moreover, each figure of FIG.9 (b), FIG.9 (d), and FIG.9 (f) is sectional drawing of the split core 130 along the E line of FIG.8 (b). Moreover, each figure of FIG.9 (c) and FIG.9 (e) is sectional drawing of the split core 130 along the F line of FIG.8 (c). The broken-line arrows shown in FIGS. 9A to 9F indicate the flow of magnetic flux.
  9A and 9B show the flow of magnetic flux entering and exiting the split core 130 through the upper surface 124a (one side surface in the axial direction) of the tooth portion 123. FIG. That is, this magnetic flux is a magnetic flux that flows between the tooth portion 123 and the magnet 13a when the divided core 130 is used instead of the divided core 30 in FIG. As shown in these drawings, the magnetic flux passing through the tooth portion 123 through the upper surface 124a enters and exits between the yoke portion 122 and the tooth portion 123, avoiding the sides E1, E2, and E3 of the yoke portion 122. The magnetic flux avoids each side of the yoke portion 122 in this way because the magnetic flux is concentrated and saturated.
  9C and 9D show the flow of magnetic flux that enters and exits the split core 130 through the inner peripheral surface 124b (one side surface in the radial direction) of the tooth portion 123. FIG. That is, this magnetic flux is a magnetic flux that flows between the tooth portion 123 and the magnet 13b when the divided core 130 is used instead of the divided core 30 in FIG. As shown in these drawings, the magnetic flux passing through the tooth portion 123 through the inner peripheral surface 124b enters and exits between the yoke portion 122 and the tooth portion 123, avoiding the sides E2, E4, and E5 of the yoke portion 122, as described above. To do.
  9E and 9F show the flow of magnetic flux that enters and exits the split core 130 through the outer peripheral surface 124c (the other side surface in the radial direction) of the tooth portion 123. FIG. That is, this magnetic flux is a magnetic flux that flows between the tooth portion 123 and the magnet 13c when the divided core 130 is used instead of the divided core 30 in FIG. As shown in these drawings, the magnetic flux passing through the tooth portion 123 through the outer peripheral surface 124c enters and exits between the yoke portion 122 and the tooth portion 123, avoiding the sides E3, E6, and E7 of the yoke portion 122, as described above. .
  As described above, the magnetic flux entering and exiting the split core 130 through each surface of the tooth portion 123 enters and exits between the yoke portion 122 and the tooth portion 123 while avoiding (bypassing) the sides of the yoke portion 122. Due to such detouring of the magnetic flux, the connecting portion of the split core 130 has a relatively large magnetic resistance with respect to the magnetic flux entering and exiting the split core 130 through each surface of the tooth portion 123.
  Next, FIGS. 10A to 10F are cross-sectional views of the split core 30 corresponding to FIGS. 9A to 9F, respectively. Also in these drawings, broken arrows indicate the flow of magnetic flux.
  As described above, the yoke part 22 of the split core 30 is a columnar body formed by rounding the sides E1 to E8 of the yoke part 122. Therefore, as shown in FIGS. 10A to 10F, the end 22a has no side where the magnetic flux is concentrated. Therefore, the magnetic resistance of the connecting portion of the split core 30 with respect to the magnetic flux entering and leaving the split core 30 through each surface of the tooth portion 23 is smaller than that of the split core 130.
  As described above, according to the three-dimensional rotating machine 1, the magnetic resistance of the connecting portion of the split core 30 with respect to the magnetic flux entering and exiting the split core 30 through the upper surface 24a, the inner peripheral surface 24b, and the outer peripheral surface 24c of the tooth portion 23. Therefore, the efficiency of a three-dimensional rotating machine using a split core can be improved.
  Here, in the three-dimensional rotating machine 1, even if the magnetic resistance is not necessarily reduced with respect to the magnetic flux in all directions, sufficient efficiency may be obtained by reducing the magnetic resistance only with respect to the magnetic flux in some directions. . Further, in order to reduce the magnetic resistance generated at the connecting portion between the tooth portion 23 and the yoke portion 22, at least the end portion 22 a which is the portion inserted into the tooth portion 23 among the portions of the yoke portion 22 is subjected to the magnetic flux. It is necessary to have no edges that obstruct the flow. Further, in order to reduce the magnetic resistance of the connecting portion, the end 22a of the yoke portion 22 does not necessarily have to be a hemispherical shape, and may have a shape having at least no side.
  In view of the above, various variations in the shape of the yoke portion 22 are conceivable. Hereinafter, the variation of the shape of the yoke part 22 will be specifically described. FIG. 11A to FIG. 11F are perspective views showing variations of the yoke portion 22. Note that the side surfaces 50a, 50b, and 50c of the yoke portion 22 shown in these drawings are respectively a surface facing the magnet 13a (one side surface in the axial direction), an inner peripheral surface (one side surface in the radial direction), and an outer peripheral surface (radial direction). The other side of FIG.
  FIG. 11A is an example in which the yoke portion 22 is a columnar body having a shape in which only a portion belonging to the side surface 50a of the end portion 22a is chamfered. In this example, the effect of reducing the magnetic resistance can be obtained with respect to the magnetic flux in the axial direction.
  FIG. 11B is an example in which the yoke portion 22 is a columnar body having a shape in which only a part of the end portion 22a belonging to the side surface 50a is chamfered. Even in this example, an effect of reducing the magnetic resistance with respect to the magnetic flux in the axial direction can be obtained.
  FIG. 11C illustrates an example in which the yoke portion 22 is a columnar body having a shape in which the entire side surface 50a (excluding the connection portion with the tooth portion 23) is rounded. Also in this example, the effect of reducing the magnetic resistance can be obtained with respect to the magnetic flux in the axial direction.
  FIG. 11D shows an example in which the yoke portion 22 is a columnar body formed by rounding only the portions belonging to the side surfaces 50a and 50b of the end portion 22a. In this example, in addition to the magnetic flux in the axial direction, the effect of reducing the magnetic resistance is obtained with respect to the magnetic flux entering and exiting the split core 30 through the inner peripheral surface 24b (FIG. 1B) of the teeth portion 23 in the radial direction magnetic flux. It is done.
  FIG. 11E shows an example in which the yoke portion 22 is a columnar body having a shape in which all the end portion 22a is chamfered. In this example, the effect of reducing the magnetic resistance can be obtained for all the magnetic fluxes in the axial direction and the radial direction.
  FIG. 11 (f) is an example in which the yoke portion 22 is a columnar body having a shape in which all portions except for the connection portion with the tooth portion 23 are chamfered. Also in this example, the effect of reducing the magnetic resistance can be obtained for all the magnetic fluxes in the axial direction and the radial direction.
  Finally, the operation of the three-dimensional rotating machine 1 will be described.
  When a current is supplied to each coil 25 while appropriately switching the direction, a rotating magnetic field is generated in the stator core 21, and the rotor 11 and the shaft 10 are rotated so as to follow the rotating magnetic field. Thereby, the three-dimensional rotating machine 1 functions as an electric motor (motor).
  On the other hand, when the shaft 10 is rotated by an external force, a voltage is generated in each coil 25 by electromagnetic induction. Thereby, the three-dimensional rotating machine 1 also functions as a generator.
  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to such embodiment at all, and this invention can be implemented in various aspects in the range which does not deviate from the summary. Of course.
  For example, in the above-described embodiment, the core member (stator core 21) is fixed to the base 20 and the magnet support member (rotor 11) rotates about the X axis as the rotation axis. However, the magnet support member serves as the core member. However, this relationship may be reversed because it only needs to be able to rotate relatively. That is, a configuration in which the magnet support member is fixed to the base 20 and the core member rotates about the X axis as a rotation axis may be employed.
  Moreover, in the said embodiment, although the upper surface, inner peripheral surface, and outer peripheral surface of the stator core were made into the magnet opposing surface, this invention is not limited to such a form. Specifically, at least one of the upper surface and the lower surface of the stator core and at least one of the inner peripheral surface and the outer peripheral surface may be set as the magnet facing surface. In this case, the shape of the yoke portion 22 may be a columnar body in which only a portion of the end portion 22a that faces each magnet facing surface when fitted to the concave portion 26 is chamfered. .
  FIG. 12A and FIG. 12B are diagrams illustrating examples of cross-sectional views of a three-dimensional rotating machine in which the upper surface, the lower surface, and the outer peripheral surface of the stator core are magnet facing surfaces. Also in the three-dimensional rotating machine 60 shown in the figure, the stator core 61 is an annular member, and a plurality of divided cores 70 arranged in an annular shape along the circumferential direction are connected as shown in FIGS. 2 and 3. The structure is the same as that of the three-dimensional rotating machine 1. Each divided core 70 has a yoke portion 62 and a teeth portion 63, respectively, and the shape thereof is the same as that shown in FIGS. 4 (a) and 4 (b). However, in the three-dimensional rotating machine 60, the upper surface 64a (one side surface in the axial direction), the outer peripheral surface 64c (the other side surface in the radial direction), and the lower surface 64d (the other side surface in the axial direction) of the teeth portion 63 are respectively a magnet 83a and a magnet. 83c and a magnet facing surface facing the magnet 83d.
  FIGS. 13A and 13B are perspective views showing variations in the shape of the yoke portion 62. FIG. The side surfaces 90a, 90c, and 90d of the yoke portion 62 shown in these drawings are respectively a surface facing the magnet 83a (one side surface in the axial direction), a surface facing the magnet 83c (the other side surface in the radial direction), and a magnet 83d. The opposite surface (the other side surface in the axial direction) is shown.
  FIG. 13A shows an example in which the yoke portion 22 is a columnar body having a shape in which only portions belonging to the side surfaces 90a, 90c, and 90d of the end portion 62a are chamfered. In this example, the magnetic resistance is reduced with respect to the axial magnetic flux entering and exiting the split core 70 through the side surfaces 64a and 64d of the tooth portion 63 and the radial magnetic flux entering and exiting the split core 70 through the side surface 64c of the tooth portion 63. An effect is obtained.
  FIG. 11B shows an example in which the yoke portion 22 is a columnar body having a shape in which each of the side surfaces 90a, 90c, and 90d (excluding the connection portion with the tooth portion 63) is chamfered. Also in this example, the magnetic resistance is reduced with respect to the axial magnetic flux entering and exiting the split core 70 through the side surfaces 64a and 64d of the tooth portion 63 and the radial magnetic flux entering and exiting the split core 70 through the side surface 64c of the tooth portion 63. An effect is obtained.
DESCRIPTION OF SYMBOLS 1 Three-dimensional rotating machine 10 Shaft 11 Rotor 11a Disk-shaped part 11b of a rotor, 11c Cylindrical part 12a, 12b, 12c Rotor stator core opposing surface 13a-13c Magnet 20 Base 20a Base cylindrical part 21 Stator core 22 Yoke part 22a End portion 23 Teeth portion 23a Upper projection portion 23b Inner projection portion 23c Outer projection portion 23d Lower projection portion 23bf, 23cf Hook portion 24a Upper projection upper surface 24b Inner projection inner peripheral surface 24c Outer projection outer peripheral surface 24e One side surface 24f in the circumferential direction The other side surface 25 in the circumferential direction 25 Coil 26 Recess 30 Split core 40 Bearing

Claims (7)

  1. Each has a teeth portion having a magnet facing surface on one side surface in the radial direction and one side surface in the axial direction, and a bar-shaped yoke portion around which the winding is wound, and includes a plurality of divided cores arranged in an annular shape ,
    The split core is composed of a soft magnetic metal dust material,
    The end of the yoke part of each split core is fitted with a recess provided in the teeth part of the adjacent split core,
    The yoke portion has an R-chamfered portion at least part of the end portion facing the one side surface in the axial direction or at least part of the portion facing the one side surface in the radial direction. A core member for a rotating machine, wherein the core member is a columnar body having a shape as follows.
  2. The teeth portion of each split core has a magnet facing surface on at least one of the other side surface in the radial direction or the other side surface in the axial direction,
    The columnar body constituting the yoke portion has a shape in which at least a part of the end portion facing the at least one of the other side surface in the radial direction or the other side surface in the axial direction is chamfered. The core member for a rotating machine according to claim 1.
  3.   The core member for a rotating machine according to claim 2, wherein the columnar body constituting the yoke portion does not have a side at least at the end portion.
  4.   The core member for a rotating machine according to claim 3, wherein the end portion is configured only by a curved surface.
  5.   The core member for a rotating machine according to claim 2, wherein the end portion has a hemispherical shape.
  6.   The core member for a rotating machine according to claim 2, wherein the columnar body constituting the yoke portion is a columnar body having the hemispherical end portion.
  7. A core member for a rotating machine according to any one of claims 1 to 6,
    A rotating machine comprising: a magnet support member having a permanent magnet facing each magnet facing surface of each divided core.
JP2009074634A 2009-03-25 2009-03-25 Core member for rotating machine and rotating machine Withdrawn JP2010226937A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP2009074634A JP2010226937A (en) 2009-03-25 2009-03-25 Core member for rotating machine and rotating machine

Publications (1)

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JP2010226937A true JP2010226937A (en) 2010-10-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101276633B1 (en) * 2011-12-23 2013-06-18 한국생산기술연구원 The stator core-unit
WO2016034570A1 (en) * 2014-09-02 2016-03-10 Höganäs Ab (Publ) Stator assembly for an axial flux machine
CN106602827A (en) * 2015-10-16 2017-04-26 铃木株式会社 Rotating motor
WO2019057597A1 (en) * 2017-09-20 2019-03-28 Continental Automotive Gmbh Electric machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101276633B1 (en) * 2011-12-23 2013-06-18 한국생산기술연구원 The stator core-unit
WO2016034570A1 (en) * 2014-09-02 2016-03-10 Höganäs Ab (Publ) Stator assembly for an axial flux machine
CN106602827A (en) * 2015-10-16 2017-04-26 铃木株式会社 Rotating motor
WO2019057597A1 (en) * 2017-09-20 2019-03-28 Continental Automotive Gmbh Electric machine

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