JP2008160925A - Armature core, armature and its manufacturing process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the space factor of winding. <P>SOLUTION: The armature core 1 includes a plurality of first teeth 11 each having first and second cores 111 and 112, and a plurality of second teeth 12 each having third and fourth cores 121 and 122. The first and third cores 111 and 121 are arranged alternately along the circumferential direction 93 and located at the same position in one direction 92. The second and fourth cores 112 and 122 are provided on the side of one direction 92 for the first and third cores 111 and 121. The first core 111 has a first side face 111a curving convexly on the third core 121 side. The second core 112 has a second side face 112a curving concavely on the fourth core 122 side and projects to at least any one of the outer circumferential side and the inner circumferential side for the first core 111. The third and fourth cores 121 and 122 have the same shape as those of the second and first cores 112 and 111, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an armature core, an armature, and a method for manufacturing the same, and is particularly applicable to an axial gap type rotating electrical machine.

  The rotating electric machine has an armature and a field element. In particular, in an axial gap type rotating electrical machine, the armature and the field element face each other through an air gap that extends along a plane orthogonal to the rotational axis.

  The armature includes a tooth extending to the field element side and a winding wound around the tooth. For example, concentrated winding or distributed winding is adopted as the winding method. In particular, the use of concentrated winding is desirable in that the armature can be reduced in size.

  A technique related to the present invention is disclosed in Patent Document 1.

JP 2006-14565 A

  However, in the concentrated winding, the polarity of the winding increases, so that the winding tends to swell more than the teeth. Further, since the cross-sectional area of the winding is not zero, the winding is more likely to swell than the tooth due to the tension applied to the winding. When the winding swells, the space factor of the winding decreases.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to improve the space factor of the winding.

  The armature core according to claim 1 of the present invention includes a plurality of first teeth (11) having first and second magnetic cores (111, 112), and third and fourth magnetic cores (121, 122). And a plurality of second teeth (12) having a plurality of second teeth (12), wherein the first and third magnetic cores are alternately arranged around the central axis (91) in a circumferential direction (93), And in the one direction (92) along the central axis, the second and fourth magnetic cores are provided on the one direction side with respect to the first and third magnetic cores, respectively. The first magnetic cores have the first side surface (111a) which is on the third magnetic core side adjacent to the circumferential direction of the first magnetic core and is convexly curved; The second magnetic core is adjacent to the fourth magnetic core along the circumferential direction. A second side surface (112a) that is concavely curved and protrudes toward at least one of an outer peripheral side and an inner peripheral side with respect to the first magnetic core; Having a third side surface (121a) which is concavely curved on the first magnetic core side adjacent to the circumferential direction, and at least one of the outer peripheral side and the inner peripheral side with respect to the fourth magnetic core. The fourth magnetic core protrudes in one direction and has a fourth side surface (122a) that is convexly curved on the second magnetic core side adjacent to the fourth magnetic core along the circumferential direction.

  An armature core according to a second aspect of the present invention is the armature magnetic core according to the first aspect, wherein the shape of the third side surface (121a) when viewed from the one direction (92) is the first. The shape of one side surface (111a) is substantially the same as the shape obtained by similarly expanding.

  An armature core according to a third aspect of the present invention is the armature core according to the first or second aspect, wherein the shape of the second side surface (112a) when viewed from the one direction (92). However, the shape of the fourth side surface (122a) is substantially the same as the enlarged shape.

  An armature core according to a fourth aspect of the present invention is the armature magnetic core according to any one of the first to third aspects, wherein the armature core is provided at any position on the first side surface (111a). In the circumferential direction (93), the distance (w1) along the circumferential direction between the third side surface (121a) adjacent to the first side surface is the same.

  An armature magnetic core according to a fifth aspect of the present invention is the armature magnetic core according to any one of the first to fourth aspects, wherein the armature core is at any position on the fourth side surface (122a). The distance (w2) along the circumferential direction is the same between the second side surface (112a) adjacent to the fourth side surface in the circumferential direction (93).

  An armature magnetic core according to a sixth aspect of the present invention is the armature magnetic core according to any one of the first to fifth aspects, wherein the one direction of the first magnetic core (111) ( 92) and the cross-sectional area (S112) of the second magnetic core (112) in the one direction are substantially the same.

  An armature core according to a seventh aspect of the present invention is the armature core according to any one of the first to sixth aspects, wherein the third magnetic core (121) is in the one direction. The cross-sectional area (S121) and the cross-sectional area (S122) with respect to the one direction of the fourth magnetic core (122) are substantially the same.

  An armature magnetic core according to an eighth aspect of the present invention is the armature magnetic core according to any one of the first to seventh aspects, wherein the first tooth (11) is the first arm (11). The fifth magnetic core (113) is further provided between the magnetic core (111) and the second magnetic core (112), and the cross section of the fifth magnetic core with respect to the one direction (92) is the first and second magnetic cores (113). Each of the second magnetic cores (111, 112) includes a cross section with respect to the one direction, and the fifth magnetic core is magnetically separated from the second teeth.

  An armature magnetic core according to a ninth aspect of the present invention is the armature magnetic core according to the eighth aspect, wherein the edge of the fifth magnetic core (113) is viewed from the one direction (92). Of the edge of the first magnetic core (111), the portion outside the edge of the second magnetic core (112), and of the edge of the second magnetic core, than the edge of the first magnetic core. And an outer portion.

  An armature core according to a tenth aspect of the present invention is the armature core according to the eighth or ninth aspect, wherein the first magnetic core (111) of the fifth iron core (113) is the same. A portion (1131a) of the opposite surface (1131) that overlaps with the first magnetic core but does not overlap with the second magnetic core (112) when viewed from the one direction (92) is the circumferential direction (93). ) Or away from the second magnetic core along the opposite direction, and retreats to the opposite side of the one direction.

  An armature core according to an eleventh aspect of the present invention is the armature core according to any one of the first to tenth aspects, wherein the second tooth (12) is the third arm. A sixth magnetic core (123) between the magnetic core (121) and the fourth magnetic core (122), and the cross-section of the sixth magnetic core in the one direction (92) is the third and Each of the fourth magnetic cores (121, 122) includes a cross section with respect to the one direction, and the sixth magnetic core is magnetically separated from the first teeth.

  An armature magnetic core according to a twelfth aspect of the present invention is the armature magnetic core according to any one of the eighth to tenth aspects, wherein the second tooth (12) is the third armature (12). A sixth magnetic core (123) and a first thin portion along the circumferential direction (93) between the magnetic core (121) and the fourth magnetic core (122), and The cross section of the magnetic core in the one direction (92) includes both the cross sections of the third and fourth magnetic cores (121, 122) in the one direction, and is adjacent along the circumferential direction. The fifth and sixth magnetic cores (113, 123) belonging to the first and second teeth (11, 12) are connected to each other by the first thin portion.

  An armature core according to a thirteenth aspect of the present invention is the armature core according to the eleventh or twelfth aspect, wherein the armature core of the sixth magnetic core (123) is viewed from the one direction (92). An edge is a portion of the edge of the third magnetic core (121) that is outside the edge of the fourth magnetic core (122), and the third magnetic core of the edge of the fourth magnetic core. And a portion on the outside of the edge.

  An armature magnetic core according to a fourteenth aspect of the present invention is the armature core according to any one of the eleventh to thirteenth aspects, wherein the fourth of the sixth iron cores (123). Of the surface (1231) opposite to the magnetic core (122), the portion (1231a) that overlaps the fourth magnetic core but does not overlap the third magnetic core (121) when viewed from the one direction (92) Retreats toward the one-way side as it moves away from the third magnetic core along the circumferential direction (93) or the opposite direction.

  An armature core according to a fifteenth aspect of the present invention is the armature core according to any one of the first to fourteenth aspects, wherein the first core of the second magnetic core (112) is provided. With respect to the end surface (112b) on the magnetic core (111) side, a portion (112c) overlapping the first magnetic core as viewed from the one direction (92) is retreated in the one direction with respect to the other portion.

  An armature core according to a sixteenth aspect of the present invention is the armature core according to any one of the first to fifteenth aspects, wherein the fourth core of the third magnetic core (121) is provided. With respect to the end surface (121b) on the magnetic core (122) side, the portion (121c) overlapping the fourth magnetic core when viewed from the one direction (92) is retracted to the opposite side to the one direction with respect to the other portion. It is.

  An armature magnetic core according to a seventeenth aspect of the present invention is the armature core according to any one of the first to sixteenth aspects, wherein the one-way ( 92), and the cross-sectional area (S41) of the first magnetic plate with respect to the one direction is the first magnetic plate provided with the first magnetic plate. Each of the first and second magnetic cores (111, 112) belonging to the teeth is larger than any of the cross-sectional areas (S111, S112) in the one direction, and the first magnetic plate is provided by itself. The first teeth are magnetically separated from the second teeth (12) adjacent in the circumferential direction (93).

  An armature magnetic core according to an eighteenth aspect of the present invention is the armature magnetic core according to any one of the first to seventeenth aspects, wherein the one-direction ( 92), the second magnetic plate (42) is further provided, and the cross-sectional area (S42) in the one direction of the second magnetic plate is the second magnetic plate provided with the second magnetic plate. Each of the third and fourth magnetic cores (121, 122) belonging to the teeth is larger than any of the cross-sectional areas (S121, S122) in the one direction, and the second magnetic plate is provided by itself. The second teeth are magnetically separated from the first teeth (11) adjacent in the circumferential direction (93).

  An armature magnetic core according to a nineteenth aspect of the present invention is the armature magnetic core according to the seventeenth aspect, wherein the second magnetic body is provided on the second tooth (12) from the one direction (92). A plate (42) and a second thin portion (431) along the circumferential direction (93), and the cross-sectional area (S42) of the second magnetic plate with respect to the one direction is the second The circumferential direction is larger than any of the cross-sectional areas (S121, S122) of the third and fourth magnetic cores (121, 122) belonging to the second tooth on which the magnetic plate is provided with respect to the one direction. The first and second magnetic plates (41, 42) provided in the first and second teeth (11, 12) adjacent to each other along the second thin portion Connected with

  An armature magnetic core according to a twentieth aspect of the present invention is the armature magnetic core according to any one of the seventeenth to nineteenth aspects, in which the one-way ( 92), and a third magnetic plate (43) provided from the opposite direction to the first magnetic plate. One of the first and second magnetic cores (111, 112) belonging to one tooth is larger than any of the cross-sectional areas (S111, S112) in the one direction, and the third magnetic plate is The first teeth provided are magnetically separated from the second teeth (12) adjacent in the circumferential direction (93).

  An armature magnetic core according to a twenty-first aspect of the present invention is the armature core according to any one of the eighteenth to twentieth aspects, wherein the one-direction ( 92) and a fourth magnetic plate (44) provided from the opposite direction, and the cross-sectional area of the fourth magnetic plate in the one direction is the second magnetic plate provided with the fourth magnetic plate. The third and fourth magnetic cores (121, 122) belonging to the teeth are larger than any of the cross-sectional areas (S121, S122) in the one direction, and the fourth magnetic plate is provided by itself. The second teeth are magnetically separated from the first teeth (11) adjacent in the circumferential direction (93).

  An armature core according to a twenty-second aspect of the present invention is the armature core according to the twentieth aspect, wherein the second tooth (12) is provided in a direction opposite to the one direction (92). 4, and a third thin portion (432) along the circumferential direction (93), and the cross-sectional area of the fourth magnetic plate with respect to the one direction is the fourth Each of the third and fourth magnetic cores (121, 122) belonging to the second tooth on which the magnetic plate is provided is larger than any of the cross-sectional areas (S121, S122) with respect to the one direction, The third and fourth magnetic plates (43, 44) provided in the first and second teeth (11, 12) adjacent to each other in the direction are mutually connected to the third thin wall. Connected by part.

  An armature magnetic core according to a twenty-third aspect of the present invention is the armature magnetic core according to any one of the first to nineteenth aspects, wherein the first and second teeth (11, 12). ) Further includes a yoke (5) provided from the one direction (92) side.

  The armature core according to claim 24 of the present invention is the armature core according to claim 23, wherein only the yoke (5) and the first and third magnetic cores (111, 121) are provided. It is molded in one piece.

  The armature core according to claim 25 of the present invention is the armature core according to claim 23, wherein the yoke (5) extends along the circumferential direction (93) around the central axis (91). One of the magnetic bodies adjacent to each other along the circumferential direction is provided with only one first tooth (11), and the magnetic body On the other hand, only one second tooth (12) is provided.

  An armature core according to a twenty-sixth aspect of the present invention is the armature core according to any one of the first to twenty-fifth aspects, wherein the third and second outer cores are arranged on an outer peripheral side and an inner side. At least one portion (1211) on the circumferential side overlaps the first magnetic core (111) when viewed from the central axis (91).

  An armature core according to a twenty-seventh aspect of the present invention is the armature core according to any one of the first to twenty-sixth aspects, wherein the armature core is an outer peripheral side and an inner side of the second magnetic core (112). At least one of the peripheral portions overlaps the fourth magnetic core (122) when viewed from the central axis (91).

  An armature according to a twenty-eighth aspect of the present invention is the armature core (1) according to any one of the first to twenty-seventh aspects, the first magnetic core (111), and the fourth magnetic core. Each of (122) includes windings (31, 32) arranged one by one.

  A method for manufacturing an armature according to a twenty-ninth aspect of the present invention includes a third magnetic plate (43) provided on the first tooth (11) from a side opposite to the one direction (92), and the first tooth (11). A second magnetic plate (44) provided on the second tooth (12) from the opposite side to the one direction (92), and a third thin portion along the circumferential direction (93), The cross-sectional area of the third magnetic plate with respect to the one direction is the cross-sectional area of each of the first and second magnetic cores (111, 112) belonging to the first teeth on which the third magnetic plate is provided. The cross-sectional area with respect to one direction is larger than any of the cross-sectional areas with respect to one direction (S111, S112), and the cross-sectional area with respect to the one direction of the fourth magnetic body plate belongs to the second teeth provided with the fourth magnetic body plate. Third and fourth magnetic cores (121, 122) The third and the second teeth (11, 12) provided in each of the first and second teeth (11, 12) that are larger than any of the cross-sectional areas (S121, S122) in the one direction and are adjacent along the circumferential direction. The armature magnetic core (1) and the first magnetic core (111) according to claim 19, wherein the fourth magnetic plates (43, 44) are connected to each other by the third thin portion. And an armature having windings (31, 32) arranged one by one on each of the fourth magnetic cores (122), comprising: (a) the first and third Of the magnetic plates (41, 43), the winding (31) is wound around the first magnetic core belonging to the first tooth connected only to the third magnetic plate, Obtaining a member (103); and (b) the second and fourth magnets. Of the body plates (42, 44), the winding (32) is wound around a fourth magnetic core belonging to the second tooth connected only to the second magnetic body plate, and the second member ( 104), and (c) the first member obtained in the step (a) with the first tooth directed in one direction, and the second member obtained in the step (b). The member includes a step of directing the second teeth toward the first member and connecting the first and second members to each other, and in the step (c), the first The first teeth belonging to the second member are coupled to the first magnetic plate belonging to the second member, and the second teeth belonging to the second member belong to the first member. 4 magnetic plates.

  The armature manufacturing method according to a thirty-third aspect of the present invention further includes a yoke (5) in which both the first and second teeth (11, 12) are provided from the one-direction side. 19. An electric machine having the armature core (1) according to 19, and windings (31, 32) arranged one by one on each of the first magnetic core (111) and the fourth magnetic core (122). In the method of manufacturing a child, (a) the winding (31) is wound around the first magnetic core belonging to the first tooth connected only to the yoke, and the first member (103 And (b) winding the winding (32) around the fourth magnetic core belonging to the second tooth connected only to the second magnetic plate (42), And (c) the first member obtained in the step (a). For the material, the first tooth is directed to one direction side, and the second member obtained in the step (b) is directed to the first member side, the second tooth is directed to the side. Connecting the first and second members to each other, and in the step (c), the first teeth belonging to the first member belong to the second member. The second teeth connected to the plate and belonging to the second member are wound around each of the first magnetic cores belonging to the first member and adjacent to each other in the circumferential direction (92). The yoke is connected between the wound windings.

  According to the armature core according to claim 1 of the present invention, when one winding is disposed on each of the first magnetic core of the first tooth and the fourth magnetic core of the second tooth, Since both the first and fourth side surfaces are convexly curved, the winding is along the first and fourth side surfaces. Therefore, the space factor of the winding is improved.

  In addition, since the third side surface is concavely curved, many windings can be arranged on the first magnetic core without being obstructed by the third magnetic core. Similarly, since the second side surface is also curved concavely, many windings can be arranged in the fourth magnetic core without being obstructed by the second magnetic core.

  With respect to the third magnetic core, by making the length along the circumferential direction viewed from one direction smaller than that of the fourth magnetic core, more windings can be arranged in the first magnetic core. Similarly, by making the length along the circumferential direction viewed from one direction smaller than that of the first magnetic core, more windings can be arranged in the fourth magnetic core. Even if the length along the circumferential direction of the second and third magnetic cores is smaller than the length along the circumferential direction of the first and fourth magnetic cores, respectively, the second and third magnetic cores are Since each of the four magnetic cores protrudes to at least one of the outer peripheral side and the inner peripheral side, the cross-sectional area of each of the second and third magnetic cores in one direction can be increased. Therefore, a decrease in the magnetic resistance of the first and second teeth is prevented.

  According to the armature core of claim 2 of the present invention, the third magnetic core hardly inhibits the arrangement of the windings on the first magnetic core.

  According to the armature core of claim 3 of the present invention, the second magnetic core hardly inhibits the arrangement of the windings on the fourth magnetic core.

  According to the armature core according to claim 4 of the present invention, the space factor of the windings arranged between the first and third side surfaces adjacent in the circumferential direction is increased.

  According to the armature core according to claim 5 of the present invention, the space factor of the windings arranged between the fourth and second side surfaces adjacent in the circumferential direction is increased.

  According to the armature core according to claim 6 of the present invention, a decrease in the magnetic resistance of the first tooth is prevented.

  According to the armature core according to claim 7 of the present invention, a decrease in the magnetic resistance of the second tooth is prevented.

  According to the armature core according to claim 8 of the present invention, the magnetic flux easily flows between the first and second magnetic cores having different cross-sectional shapes. In addition, since the fifth magnetic core is magnetically separated from the second tooth, a short circuit of the magnetic flux between the first tooth and the second tooth is prevented.

  According to the armature magnetic core of the ninth aspect of the present invention, the fifth magnetic core and the second tooth are easily magnetically separated.

  According to the armature core of claim 10 of the present invention, the fifth magnetic core does not hinder the arrangement of the windings on the fourth magnetic core. Moreover, magnetic flux tends to flow between the first and second magnetic cores.

  According to the armature core according to the eleventh aspect of the present invention, the magnetic flux easily flows between the third and fourth magnetic cores having different cross-sectional shapes. In addition, since the sixth magnetic core is magnetically separated from the first tooth, a short circuit of the magnetic flux between the first tooth and the second tooth is prevented.

  According to the armature magnetic core according to claim 12 of the present invention, the magnetic flux easily flows between the third and fourth magnetic cores having different cross-sectional shapes. In addition, since the fifth and sixth magnetic cores are connected to each other by the first thin portion, they are magnetically separated. Furthermore, by adopting a magnetic material for the first thin part, the fifth and sixth magnetic cores and the first thin part can be integrally formed.

  According to the armature core of the thirteenth aspect of the present invention, it is easy to magnetically separate the sixth magnetic core and the first tooth.

  According to the armature magnetic core of the fourteenth aspect of the present invention, the sixth magnetic core does not hinder the arrangement of the windings on the first magnetic core. Moreover, magnetic flux tends to flow between the third and fourth magnetic cores.

  According to the armature magnetic core of the fifteenth aspect of the present invention, the first magnetic core and the first magnetic core are fitted by fitting the first magnetic core into a portion of the end surface of the second magnetic core that is recessed in one direction. The two magnetic cores can be easily connected. In addition, the first tooth obtained by connecting the first and second magnetic cores is formed with a portion whose cross section with respect to one direction includes both cross sections of the first and second magnetic cores. Therefore, the magnetic flux tends to flow between the first and second magnetic cores having different cross-sectional shapes.

  According to the armature magnetic core of the sixteenth aspect of the present invention, the fourth magnetic core is fitted into the portion of the third magnetic core that is recessed toward the opposite side to the one direction, so that the third magnetic core The magnetic core and the fourth magnetic core can be easily connected. In addition, the second tooth obtained by connecting the third and fourth magnetic cores is formed with a portion whose cross section in one direction includes both the cross sections of the third and fourth magnetic cores. Therefore, the magnetic flux easily flows between the third and fourth magnetic cores having different cross-sectional shapes.

  According to the armature core of the seventeenth aspect of the present invention, a desired shape can be adopted as the cross-sectional shape of the first magnetic plate. And the short circuit of the magnetic flux between the 1st teeth and the 2nd teeth is prevented.

  According to the armature core according to claim 18 of the present invention, a desired shape can be adopted as the cross-sectional shape of the second magnetic plate. And the short circuit of the magnetic flux between the 1st teeth and the 2nd teeth is prevented.

  According to the armature core of the nineteenth aspect of the present invention, a desired shape can be adopted as the cross-sectional shape of the second magnetic plate. In addition, since the first and second magnetic plates are connected to each other by the second thin portion, they are magnetically separated. Furthermore, by adopting a magnetic material for the second thin portion, the first and second magnetic plates and the second thin portion can be integrally formed.

  According to the armature core of the twentieth aspect of the present invention, a desired shape can be adopted as the cross-sectional shape of the third magnetic body plate. And the short circuit of the magnetic flux between the 1st teeth and the 2nd teeth is prevented.

  According to the armature core according to the twenty-first aspect of the present invention, a desired shape can be adopted as the cross-sectional shape of the fourth magnetic plate. And the short circuit of the magnetic flux between the 1st teeth and the 2nd teeth is prevented.

  According to the armature core according to the twenty-second aspect of the present invention, a desired shape can be adopted as the cross-sectional shape of the fourth magnetic plate. In addition, since the third and fourth magnetic plates are connected to each other by the third thin portion, they are magnetically separated. Furthermore, by adopting a magnetic material for the third thin portion, the third and fourth magnetic plates and the third thin portion can be integrally formed.

  According to the armature core of the twenty-third aspect of the present invention, in the armature obtained by arranging the windings, the output and efficiency of the armature can be increased.

  According to the armature core of the twenty-fourth aspect of the present invention, molding of the yoke and the first and third magnetic cores is simplified. Moreover, the arrangement of the windings on the first magnetic core is not hindered.

  According to the armature core of claim 25 of the present invention, the first or second tooth and the magnetic body can be connected to each other before the magnetic body is connected along the circumferential direction. The first and second teeth are alternately arranged annularly along the circumferential direction simply by alternately coupling the magnetic body coupled with the teeth and the magnetic body coupled with the second teeth along the circumferential direction. Can be arranged.

  Moreover, it is easy to arrange the windings on the first and second teeth before connecting the magnetic bodies. Therefore, the manufacture of the armature is simplified.

  According to the armature core according to claim 26 or claim 27 of the present invention, a bending mode is unlikely to occur in an armature obtained by arranging windings. Therefore, the natural vibration frequency can be increased. Moreover, the strength against the suction force can be increased.

  According to the armature of the twenty-eighth aspect of the present invention, the magnetic characteristics are high.

  According to the method for manufacturing an armature according to claim 29 of the present invention, since the first tooth is connected only to the third magnetic body plate, the first tooth belonging to the first tooth in the step (a). The winding of the winding around the magnetic core is not hindered by the second tooth. Since the second tooth is connected only to the second magnetic plate, the winding of the winding around the fourth magnetic core belonging to the second tooth in step (b) is inhibited by the first tooth. Not. Moreover, in the first member, the first magnetic core wound with the winding is positioned on the third magnetic plate side with respect to the second magnetic core, and in the second member, the winding of the winding is wound. Since the rotated fourth magnetic core is positioned on the second magnetic plate side with respect to the third magnetic core, the connection of the first and second members is not hindered by the winding in the step (c).

  According to the armature manufacturing method of the thirtieth aspect of the present invention, in the step (a), since the first tooth is connected only to the yoke, the winding to the first magnetic core belonging to the first tooth is performed. The winding of the wire is not inhibited by the second tooth. In the step (b), since the second tooth is connected only to the second magnetic plate, the winding of the winding around the fourth magnetic core belonging to the second tooth is inhibited by the first tooth. Not. Moreover, in the first member, the first magnetic core wound with the winding is positioned on the yoke side with respect to the second magnetic core, and in the second member, the fourth magnetic core wound with the winding is wound. Since the magnetic core is located on the second magnetic plate side with respect to the magnetic core of 3, the connection of the first and second members is not hindered by the winding in the step (c).

First embodiment.
1 and 2 are top views conceptually showing the armature according to the embodiment. The armature includes an armature magnetic core 1 and windings 31 and 32. In FIG. 2, the winding 32 is not shown in order to clarify the configuration of the armature.

  The armature magnetic core 1 includes a plurality of first teeth 11, a plurality of second teeth 12, and a yoke 5. The first tooth 11 has first and second magnetic cores 111 and 112 (FIG. 2). The 2nd teeth 12 have the 3rd and 4th magnetic cores 121 and 122 (Drawing 2). For each of the first to fourth magnetic cores 111, 112, 121, 122, a dust core can be adopted.

  FIG. 3 shows the positional relationship between the first magnetic core 111 and the third magnetic core 121. The first and third magnetic cores 111 and 121 are alternately arranged in a ring shape along the circumferential direction 93 around the central axis 91, and are in the same position in one direction 92 along the central axis 91.

  Returning to FIG. 2, the second magnetic core 112 is provided on the one-direction 92 side with respect to the first magnetic core 111. The fourth magnetic core 122 is provided on one side 92 side with respect to the third magnetic core 121. The second and fourth magnetic cores 112 and 122 are in the same position in one direction 92.

  The first magnetic core 111 has a first side surface 111 a that is on the side of the third magnetic core 121 adjacent to the first magnetic core 111 along the circumferential direction 93 and curves convexly. In FIG. 2, the first magnetic core 111 viewed from one direction 92 has a circular shape, but is not limited thereto, and may be, for example, an elliptical shape. The same applies to the fourth magnetic core 122 described later.

  The second magnetic core 112 has a second side surface 112 a and protrudes to at least one of the outer peripheral side and the inner peripheral side with respect to the first magnetic core 111. FIG. 2 shows a case where the second magnetic core 112 protrudes to both the outer peripheral side and the inner peripheral side with respect to the first magnetic core 111. In the second magnetic core 112 to which the second side surface 112a belongs, the second side surface 112a is on the side of the fourth magnetic core 122 adjacent to the second magnetic core 112 along the circumferential direction 93 and is concavely curved. Such a shape of the second magnetic core 112 viewed from the one direction 92 is commonly called, for example, a saddle shape. The same applies to a third magnetic core 121 described later.

  The third magnetic core 121 has a third side surface 121 a and protrudes to at least one of the outer peripheral side and the inner peripheral side with respect to the fourth magnetic core 122. FIG. 2 shows a case where the third magnetic core 121 protrudes both on the outer peripheral side and the inner peripheral side with respect to the fourth magnetic core 122. In the third magnetic core 121 to which the third side surface 121a belongs, the third side surface 121a is on the side of the first magnetic core 111 adjacent to the third magnetic core 121 along the circumferential direction 93, and is curved concavely.

  The fourth magnetic core 122 has a fourth side surface 122 a that is on the side of the second magnetic core 112 adjacent to itself along the circumferential direction 93 and curves convexly.

  FIG. 4 shows the winding 31 disposed on the armature core 1. Specifically, one winding 31 is disposed on each of the first magnetic cores 111. In FIG. 4, only the first and third magnetic cores 111 and 121 of the first and second teeth 11 and 12 are shown.

  As shown in FIG. 1, one winding 32 is disposed on each of the fourth magnetic cores 122.

  Since the windings 31 and 32 arranged in the first and second teeth 11 and 12 adjacent to each other along the circumferential direction 93 overlap each other when viewed from one direction 91, the windings 31 and 32 Is easy to touch. If they come into contact with each other and interfere with each other, the dielectric strength may decrease. Therefore, it is desirable to insert an insulator between the winding 31 and the winding 32 or to separate the winding 31 and the winding 32 by a predetermined distance or more.

  The yoke 5 is provided in a direction opposite to the one direction 92 with respect to the first and second teeth 11 and 12. In other words, both the first and second teeth 11 and 12 are provided on the yoke 5 from one direction 92 side.

  It is desirable to arrange the windings 31 and 32 on the first and second teeth 11 and 12 manufactured separately from the yoke 5 before providing them on the yoke 5. This is because it is easy to arrange the windings 31 and 32 around the first and second teeth 11 and 12, particularly winding them. Specifically, the windings 31 and 32 can be wound with aligned windings, so that the space factor of the windings 31 and 32 can be improved. For example, by using a rectangular wire for the windings 31 and 32, the space factor of the windings 31 and 32 is further improved.

  For the yoke 5, it is desirable to employ a laminate of electromagnetic steel plates in one direction 92 or a wound iron core. This is because the saturation magnetic flux density and the magnetic permeability can be increased and the hysteresis loss can be reduced as compared with the case where a dust core is employed.

  The yoke 5 may be provided with grooves for providing the first and second teeth 11 and 12. In such a case, it is only necessary to fit the first and second teeth 11 and 12 into the groove. Moreover, the positions of the first and second teeth 11 and 12 can be easily determined.

  According to the yoke 5, the magnetic flux generated by passing a current through the windings 31 and 32 is short-circuited on the side opposite to the air gap. Therefore, increasing the armature permeance increases the output and efficiency of the armature.

  The yoke 5 may be integrally formed with the first and third magnetic cores 111 and 121. According to this aspect, the forming of the yoke 5 and the first and third magnetic cores 111 and 121 is simplified. In particular, it is desirable to form only the first and third magnetic cores 111 and 121 together with the yoke 5. This is because the winding 31 can be disposed on the first magnetic core 111 before the second and fourth magnetic cores 112 and 122 are provided, so that the winding 31 can be easily disposed on the first magnetic core 111. Because.

  According to the armature described above, the first and fourth side surfaces 111a and 122a are both convexly curved, so that the windings 31 and 32 are along the first and fourth side surfaces 111a and 122a. That is, the winding of the windings 31 and 32 is prevented. Therefore, the space factor of the windings 31 and 32 is improved. Specifically, when the windings 31 and 32 are round wires, a space factor of 75% or more is obtained, and when the windings 31 and 32 are flat wires, a space factor of 80 to 90% or more is obtained. .

  From the viewpoint of improving the space factor of the winding 31, at any position of the first side surface 111a, between the third side surface 121 adjacent to the first side surface 111a in the circumferential direction 93, It is desirable that the distance w1 (FIG. 3) along the circumferential direction 93 is the same.

  From the viewpoint of improving the space factor of the winding 32, at any position on the fourth side surface 122 a, between the second side surface 112 a adjacent to the fourth side surface 122 a in the circumferential direction 93, It is desirable that the distance w2 (FIG. 2) along the circumferential direction 93 is the same.

  Furthermore, according to the armature according to the present embodiment, since the third side surface 121a is concavely curved, a large number of windings 31 are provided on the first magnetic core 111 without being obstructed by the third magnetic core 121. Can be arranged. In order to arrange more windings 31, it is desirable that the shape of the third side surface 121a is substantially the same as the shape of the first side surface 111a enlarged as seen from one direction 92. This is because the third magnetic core 121 does not hinder the arrangement of the winding 31 on the first magnetic core 111.

  Since the second side surface 112 a is also curved concavely, many windings 32 can be arranged on the fourth magnetic core 122 without being obstructed by the second magnetic core 112. In order to arrange more windings 32, it is desirable that the shape of the second side surface 112a is substantially the same as the shape of the fourth side surface 122a enlarged as seen from one direction 92.

  By making the length L2 of the second magnetic core 112 along the circumferential direction 93 viewed from the one direction 91 smaller than the length L1 of the first magnetic core 111 (FIG. 2), more windings 32 are obtained. Can be arranged in the fourth magnetic core 122.

  Even if the length L2 of the second magnetic core 112 is smaller than the length L1 of the first magnetic core 111, the second magnetic core 112 protrudes to both the outer peripheral side and the inner peripheral side with respect to the first magnetic core 111. Therefore, the cross-sectional area S112 (FIG. 2) with respect to the one direction 91 of the 2nd magnetic core 112 can be enlarged. Therefore, a reduction in the magnetic resistance of the first tooth 11 is prevented. The same effect can be obtained also when the second magnetic core 112 protrudes at least one of the outer peripheral side and the inner peripheral side with respect to the first magnetic core 111.

  With respect to the third magnetic core 121, the length L3 along the circumferential direction 93 viewed from the one direction 91 is made smaller than the length L4 of the fourth magnetic core 122 (FIG. 2), so that more windings 31 are obtained. Can be arranged on the first magnetic core 111.

  Even if the length L 3 of the third magnetic core 121 is smaller than the length L 4 of the fourth magnetic core 122, the third magnetic core 121 protrudes to both the outer peripheral side and the inner peripheral side with respect to the fourth magnetic core 122. Therefore, the cross-sectional area S121 (FIG. 3) with respect to the one direction 91 of the third magnetic core 121 can be increased. Therefore, a decrease in the magnetic resistance of the second tooth 12 is prevented. Note that the same effect can be obtained when the third magnetic core 121 protrudes to at least one of the outer peripheral side and the inner peripheral side with respect to the fourth magnetic core 121.

  From the viewpoint of preventing a decrease in magnetic resistance, the cross-sectional area S111 (FIG. 3) of the first magnetic core 111 in one direction 92 and the cross-sectional area S112 of the second magnetic core 112 are substantially the same for the teeth 11. It is desirable to be. As for the tooth 12, it is desirable that the cross-sectional area S122 (FIG. 2) of the fourth magnetic core 122 in one direction 92 and the cross-sectional area S121 of the third magnetic core 121 are substantially the same.

  When the shapes of the first and fourth magnetic cores 111 and 122 are the same and the shapes of the second and third magnetic cores 112 and 121 are the same, the first teeth 11; The second tooth 12 rotated 180 ° around an axis perpendicular to the central axis 91 has the same shape. Therefore, if teeth having the same shape are formed, they can be used for both the first and second teeth 11 and 12, thereby simplifying the manufacture of the armature.

  FIG. 5 shows a case where the armature magnetic core 1 further has fifth and sixth magnetic cores 113 and 123. In FIG. 5, the second and fourth magnetic cores 112 and 122 and the winding 32 are not shown in order to clarify the shapes of the fifth and sixth magnetic cores.

  The fifth magnetic core 113 is located between the first magnetic core 111 and the second magnetic core 112. The cross section of the fifth magnetic core 113 in one direction 92 includes both of the cross sections of the first and second magnetic cores 111 and 112 in one direction 92. In FIG. 5, in order to clarify the positional relationship between the first and second magnetic cores 111 and 112 and the fifth magnetic core 113 and their cross sections, the first magnetic core 111 is indicated by a broken line, The positions where the magnetic cores 112 are provided are indicated by alternate long and short dash lines.

  By providing the fifth magnetic core 113, the magnetic flux easily flows between the first and second magnetic cores 111 and 112 having different cross-sectional shapes.

  In order to prevent a short circuit of magnetic flux between the first tooth 11 and the second tooth 12, it is desirable that the fifth magnetic core 113 be magnetically separated from the second tooth 111. Specifically, in a rotating electrical machine obtained by providing a field element on an armature, the distance between the fifth magnetic core 113 and the second tooth 12 is the distance between the armature and the field element (hereinafter referred to as the armature). The air gap length is preferably at least twice as long.

  More preferably, as the cross-sectional shape of the fifth magnetic core 113, when viewed from one direction 92, the edge of the fifth magnetic core 113 is a predetermined portion of the edge of the first magnetic core 111 and the edge of the second magnetic core 112. And a predetermined portion. Here, the predetermined portion of the edge of the first magnetic core 111 is outside the edge of the second magnetic core 112. The predetermined portion of the edge of the second magnetic core 112 is outside the edge of the first magnetic core 111.

  The sixth magnetic core 123 is located between the third magnetic core 121 and the fourth magnetic core 122. The cross section of the sixth magnetic core 123 in one direction 92 includes both the cross sections of the third and fourth magnetic cores 121 and 122 in one direction 92. In FIG. 5, in order to clarify the positional relationship between the third and fourth magnetic cores 121 and 122 and the sixth magnetic core 123 and their cross sections, the third magnetic core 121 is indicated by a broken line, The positions where the magnetic cores 122 are provided are indicated by alternate long and short dash lines.

  By providing the sixth magnetic core 123, the magnetic flux easily flows between the third and fourth magnetic cores 121 and 122 having different cross-sectional shapes.

  In order to prevent a short circuit of magnetic flux between the first tooth 11 and the second tooth 12, it is desirable that the sixth magnetic core 123 be magnetically separated from the first tooth 11. Specifically, in the rotating electric machine, it is desirable that the distance between the sixth magnetic core 123 and the first tooth 11 is at least twice the air gap length.

  More preferably, as the cross-sectional shape of the sixth magnetic core 123, when viewed from one direction 92, the edge of the sixth magnetic core 123 has a predetermined portion of the edge of the third magnetic core 121 and the edge of the fourth magnetic core 122. And a predetermined portion. Here, the predetermined portion of the edge of the third magnetic core 121 is outside the edge of the fourth magnetic core 122. The predetermined portion of the edge of the fourth magnetic core 122 is outside the edge of the third magnetic core 121.

  The fifth and sixth magnetic cores 113 and 123 belonging to the first and second teeth 11 and 12 adjacent in the circumferential direction 93 may be connected to each other by a thin portion. According to this aspect, by adopting the magnetic material for the thin portion, the thin portion and the fifth and sixth magnetic cores 113 and 123 can be integrally formed. In addition, even if a magnetic material is used for the thin portion, the thin portion has a small thickness, so that its magnetic resistance is high, so that the fifth and sixth magnetic cores 113 and 123 are magnetically separated.

  FIG. 6 is a view of the cross-section at the position CC shown in FIG. 1 as viewed from the outer periphery side of the armature, and conceptually shows the shapes of the fifth and sixth magnetic cores 113 and 123.

  A surface 1131 of the fifth magnetic core 113 opposite to the first magnetic core 111 includes a portion 1131a. The portion 1131a overlaps the first magnetic core 111 but does not overlap the second magnetic core 112 when viewed from one direction 92, and increases as the distance from the second magnetic core 112 increases along the circumferential direction 93 or the opposite direction. Retreat in the opposite direction to direction 92.

  According to the shape of the fifth magnetic core 113, the arrangement of the winding 32 on the fourth magnetic core 122 is not hindered by the fifth magnetic core 113. In addition, magnetic flux tends to flow between the first and second magnetic cores 111 and 112.

  A surface 1231 of the sixth magnetic core 123 opposite to the fourth magnetic core 122 includes a portion 1231a. The portion 1231a overlaps with the fourth magnetic core 122 as viewed from one direction 92 but does not overlap with the third magnetic core 121, and increases as the distance from the third magnetic core 121 increases along the circumferential direction 93 or the opposite direction. Retreat in direction 92.

  According to this shape of the sixth magnetic core 123, the arrangement of the winding 31 on the first magnetic core 111 is not hindered by the sixth magnetic core 123. In addition, the magnetic flux easily flows between the third and fourth magnetic cores 121 and 122.

  FIG. 7 conceptually shows the shape of the second magnetic core 112 with respect to the tooth 11. With respect to the end surface 112b of the second magnetic core 112 on the first magnetic core 111 side, a portion 112c overlapping with the first magnetic core 111 when viewed from one direction 92 is recessed in one direction 92 with respect to the other portion. For the tooth 11, the solid line arrow shown in FIG. The same applies to FIG. 8 described later.

  According to such a shape of the second magnetic core 112, the first magnetic core 111 and the second magnetic core 112, as shown in FIG. 8, can be obtained by fitting the first magnetic core 111 into the recessed portion 112 c of the end surface 112 b. Can be easily connected.

  Moreover, in the first teeth 11 obtained by connecting the first and second magnetic cores 111 and 112, the cross section with respect to the one direction 92 includes both cross sections of the first and second magnetic cores 111 and 112. A portion 114 is formed. Therefore, the magnetic flux easily flows between the first and second magnetic cores 111 and 112 having different cross-sectional shapes. Note that the portion 114 can be regarded as the fifth magnetic core 113 described above.

  The third magnetic core 121 belonging to the tooth 12 may also have the same shape as the second magnetic core 112. That is, with respect to the end surface 121b of the third magnetic core 121 on the fourth magnetic core 122 side, a portion 121c overlapping the fourth magnetic core 122 when viewed from one direction 92 is in a direction opposite to the one direction 92 with respect to the other portion. (Fig. 7). For the tooth 12, the broken line arrows shown in FIGS. 7 and 8 are used as one direction 92.

  According to such a shape of the third magnetic core 121, the third magnetic core 121 and the fourth magnetic core 122 can be easily connected, and a portion 124 corresponding to the portion 114 of the tooth 11 is formed in the tooth 12.

  FIG. 9 shows a third magnetic core 121 that exhibits a shape different from the shape shown in FIG. A portion 1211 on the outer peripheral side of the third magnetic core 121 overlaps the first magnetic core 111 when viewed from the central axis 91.

  According to such a shape of the third magnetic core 121, it is difficult for the armature to generate a bending mode, particularly a drum-like mode in which the nodes have a circumferential shape. Therefore, the natural vibration frequency can be increased. In addition, the strength against the suction force can be increased.

  In order to obtain the same effect, for example, the inner peripheral portion of the third magnetic core 121 may be overlapped with the first magnetic core 111 when viewed from the central axis 91. Further, at least one of the outer peripheral side and the inner peripheral side of the second magnetic core 112 may be overlapped with the fourth magnetic core 122 when viewed from the central axis 91.

  FIG. 10 shows a case where the armature core 1 further includes first and second magnetic plates 41 and 42. The first magnetic plate 41 is provided from the one direction 92 on the first tooth 11. The cross-sectional area S41 with respect to the one direction 92 of the first magnetic plate 41 is the cross-sectional area of any of the first and second magnetic cores 111 and 112 belonging to the first tooth 11 on which the first magnetic plate 41 is provided. It is larger than S111 (FIG. 3) and S112 (FIG. 10).

  The first magnetic plate 41 and the second tooth 12 adjacent to the first tooth 11 provided with the first magnetic plate 41 along the circumferential direction 93 are magnetically separated. Is desirable. This is because a short circuit of magnetic flux between the first tooth 11 and the tooth 12 can be prevented.

  The second magnetic plate 42 is provided from the one direction 92 on the second tooth 12. The cross-sectional area S42 in one direction of the second magnetic body plate 42 is the cross-sectional area S121 of any of the third and fourth magnetic cores 121 and 122 belonging to the second tooth on which the second magnetic body plate 42 is provided. 3) and larger than S122 (FIG. 10).

  The second magnetic material plate 42 and the first tooth 11 adjacent to the second tooth 12 provided with the second magnetic material plate 42 along the circumferential direction 93 are magnetically separated. Is desirable. This is because a short circuit of magnetic flux between the first tooth 11 and the tooth 12 can be prevented.

  From the viewpoint of preventing a short circuit of magnetic flux between the first and second teeth 11 and 12, it is desirable that the first and second magnetic plates 41 and 42 are also magnetically separated from each other. In the rotating electric machine specifically described above, the distance between the first and second magnetic plates 41 and 42 is preferably at least twice the air gap length.

  According to the first and second magnetic plates 41 and 42, most of the magnetic flux flowing in the one direction 92 side of the armature can be linked to the windings 31 and 32.

  Desired shapes can be adopted for the cross-sectional shapes of the first and second magnetic plates 41 and 42, respectively. If the same shape is adopted for the cross-sectional shapes of the first and second magnetic plates 41, 42, the magnetic flux density generated on one side 92 of the armature can be made substantially uniform in the circumferential direction 93.

  The gap between the first and second magnetic plates 41, 42 provided in each of the first and second teeth 11, 12 adjacent along the circumferential direction 93 extends in the center axis 91. You may incline with respect to the radial direction used as the center. According to this aspect, since the skew is provided, harmonic components included in the magnetic flux generated by the armature can be reduced.

  FIG. 11 shows a case where the first and second magnetic plates 41 and 42 described above are connected. Specifically, the first and second magnetic plates 41, 42 provided in each of the first and second teeth 11, 12 adjacent along the circumferential direction 93 are connected to each other by a thin portion 431. ing.

  According to this aspect, by using a magnetic material for the thin portion 431, the thin portion 431 and the first and second magnetic plates 41 and 42 can be integrally formed. Moreover, even if a magnetic material is used for the thin portion 431, the thin portion 431 has a small thickness and thus has a high magnetic resistance, so that the first and second magnetic plates 41 and 42 are magnetically separated from each other. The

  Instead of the yoke 5 described above, third and fourth magnetic plates may be provided from the opposite direction to the one direction 92 for each of the first and second teeth 11 and 12. In FIG. 15 to be described later, the third and fourth magnetic plates are denoted by reference numerals 43 and 44, respectively.

  As with the first magnetic plate 41 (FIG. 10), the third magnetic plate has a cross-sectional area in one direction 92 that is greater than any of the cross-sectional areas S111 and S112 of the first and second magnetic cores 111 and 112. And is magnetically separated from the second tooth 12.

  For the fourth magnetic plate, the cross-sectional area with respect to one direction 92 is similar to that of the second magnetic plate 42 (FIG. 10) than the cross-sectional areas S121, 122 of the third and fourth magnetic cores 121, 122. And is magnetically separated from the first teeth 11.

  Similarly to the case shown in FIG. 11, the third and fourth magnetic plates provided in the first and second teeth 11, 12 adjacent in the circumferential direction 93 are thinned from each other. It may be connected with. In FIG. 15 described later, the thin portion is indicated by reference numeral 432.

  By providing the third and fourth magnetic plates together with the first and second magnetic plates 41 and 42, the thrust force applied to the armature and the field element can be reduced, and thus the bearing The load on can be reduced.

Second embodiment.
12 to 14 illustrate the armature manufacturing method described in the first embodiment in the order of steps. 12 to 14, the yoke 5 is divided into a plurality of magnetic plates 51. In other words, the yoke 5 is obtained by connecting the plurality of magnetic bodies 51 around the central axis 92 along the circumferential direction 93. Note that only one first tooth 11 or second tooth 12 is provided on one magnetic body plate 51.

  First, a first member 101 in which the first teeth 11 are provided on the magnetic body 51 and a second member 102 in which the second teeth 12 are provided on the magnetic body 51 are prepared (FIG. 12). A winding 31 is disposed on the first tooth 11 belonging to the first member 101. Specifically, the winding 31 is disposed on the first magnetic core 111. A winding 32 is disposed on the second tooth 12 belonging to the second member 102. Specifically, the winding 32 is disposed on the fourth magnetic core.

  After the windings 31 and 32 are arranged, the first member 101 and the second member 102 are alternately connected along the circumferential direction 93 (FIGS. 13 and 14). Specifically, the magnetic body 51 belonging to the first member 101 and the magnetic body 51 belonging to the second member 102 are alternately connected along the circumferential direction 93. FIG. 14 shows an armature obtained by connecting the first and second members 101 and 102.

  For example, by adopting the following shape for the magnetic body 51, it becomes easy to connect and position the magnetic bodies 51.

  For the magnetic body 51 belonging to the first member 101, a protrusion or a depression is provided on each of the same and opposite surfaces as the circumferential direction 93. 12-14, the hollow 511a is provided in the surface on the same side as the circumferential direction 93, and the processus | protrusion 511b is provided in the surface on the opposite side, respectively.

  For the magnetic body 51 belonging to the second member 102, a protrusion (on the surface on the opposite side of the circumferential direction 93 of the magnetic body 51 belonging to the first member 101 on the same side as the circumferential direction 93 ( Or recesses (or protrusions) that fit into the recesses. On the surface opposite to the circumferential direction 93, there is a recess (or protrusion) that fits into a protrusion (or recess) provided on the same surface as the circumferential direction 93 of the magnetic body 51 belonging to the first member 101. Provided. 12 to 14, a recess 512 a into which the protrusion 511 b is fitted is provided on the same surface as the circumferential direction 93, and a protrusion 512 b to be fitted into the recess 512 a is provided on the opposite surface. Yes.

  According to this manufacturing method, the first and second teeth 11 and 12 are arranged in the circumferential direction only by alternately arranging the magnetic bodies 51 belonging to the first and second members 101 and 102 along the circumferential direction 93. 93 can be arranged alternately. Therefore, the first and second teeth 11 and 12 can be easily positioned.

  In addition, before the first member 101 and the second member 102 are connected, the windings 31 and 32 can be arranged on the first and second teeth belonging to the first member 101 and the second member 102, respectively. is there. For example, the windings 31 and 32 can be easily wound around the first and second teeth. Therefore, the manufacture of the armature is simplified.

Third embodiment.
FIG. 15 shows a method for manufacturing an armature including first to fourth magnetic plates 41 to 44 among the armature described in the first embodiment. In the armature, the first and second magnetic plates 41 and 42 are connected to each other, and the third and fourth magnetic plates 43 and 44 are also connected to each other.

  In FIG. 15, the first teeth 11 are connected only to the third magnetic plate 43. The second tooth 12 is connected only to the second magnetic plate.

  First, the winding 31 is wound around the first magnetic core 111 belonging to the first tooth 11 to obtain the first member 103 (step (a)). The winding 32 is wound around the fourth magnetic core 122 belonging to the second tooth to obtain the second member 104 (step (b)).

  Next, with respect to the first member 103, the first tooth 11 is directed toward the one direction 92, and the second member 104 is directed toward the first member 103 with the second tooth 12 directed toward the first member 103. And the 2nd members 103 and 104 are mutually connected (process (c)). At this time, the first teeth 11 belonging to the first member 103 are connected to the first magnetic plate 41 belonging to the second member 104. The second teeth 12 belonging to the second member 104 are connected to the fourth magnetic plate 44 belonging to the first member 103.

  According to this manufacturing method, the first teeth 11 are connected only to the third magnetic plate 43 of the first member 103, and the second teeth 12 are not connected to the fourth magnetic plate 44. Therefore, the winding of the winding 31 around the first tooth 11 in the step (a) is not inhibited by the second tooth.

  Similarly, the second member 12 is connected only to the second magnetic plate 42 of the second member 104, and the first tooth 11 is not connected to the first magnetic plate 41, so that the process ( The winding of the winding 32 around the second tooth 12 in b) is not hindered by the first tooth.

  Moreover, in the first member 103, the first magnetic core 111 around which the winding 31 is wound is located on the third magnetic plate 43 side with respect to the second magnetic core 112. In the second member 104, the fourth magnetic core 122 around which the winding 32 is wound is positioned on the second magnetic plate 42 side with respect to the third magnetic core 121. Therefore, the connection between the first and second members 103 and 104 is not hindered by the windings 31 and 32 in the step (c).

  In the armature manufacturing method according to the present embodiment, the first and second magnetic plates 41 and 42 connected to each other in FIG. 15 or the third and fourth magnetic plates 43 and 44 connected to each other are shown. Instead of this, it can be applied to an armature in which the yoke 5 is adopted.

  In any of the above-described embodiments, the case where each of the first and second teeth 11 and 12 is provided, that is, the case of 12 poles has been described. However, this embodiment is different in the number of poles. It is applicable also to the armature which has.

  For the second and third magnetic cores 112 and 121, for example, the shape shown in FIG. Specifically, the second and third magnetic cores 112 and 121 protrude only on the outer peripheral side with respect to the first and fourth magnetic cores, respectively, and become thinner toward the inner peripheral side. Such a shape is commonly called a triangle shape or a bikini shape.

  When the second and third magnetic cores 112 and 121 are employed, for example, the shape shown in FIG. 17 can be employed for the fifth and sixth magnetic cores 113 and 123. Specifically, in the vicinity of the portion of the fifth magnetic core 113 where both the first and second magnetic cores 111 and 112 overlap as viewed from one direction 92, the length in the circumferential direction 93 is greater than that portion. Is also big. The same applies to the sixth magnetic core 123.

It is a top view which shows notably the armature demonstrated in 1st Embodiment. It is a top view which shows an armature notionally. FIG. 5 is a diagram showing a positional relationship between a first magnetic core 111 and a third magnetic core 121. It is a figure which shows the coil | winding 31 arrange | positioned at the magnetic core 1 for armatures. It is a figure which shows the 5th and 6th magnetic core 113,123 notionally. It is a figure which shows the cross section in the position CC shown by FIG. It is a figure which shows notionally the shape of the 2nd magnetic core 112. FIG. It is a figure which shows the state with which the 1st and 2nd magnetic cores 111 and 112 were connected. FIG. 6 is a diagram showing the shape of a third magnetic core 121. It is a figure which shows the 1st and 2nd magnetic body board 41 and 42 notionally. It is a figure which shows the 1st and 2nd magnetic body plates 41 and 42 mutually connected. It is a figure which shows the manufacturing method of the armature demonstrated by 2nd Embodiment. It is a figure which shows the manufacturing method of an armature in order of a process. It is a figure which shows the manufacturing method of an armature in order of a process. It is a figure which shows the manufacturing method of the armature demonstrated by 2nd Embodiment. It is a figure which shows the 2nd and 3rd magnetic core 112, 121 demonstrated by the Example. It is a figure which shows the shape of the 5th and 6th magnetic core 113,123.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Armature magnetic core 11 1st teeth 12 2nd teeth 31, 32 Winding 41 1st magnetic board 42 2nd magnetic board 43 3rd magnetic board 44 4th magnetic board 51 Magnetic Body 91 Central axis 92 One direction 93 Circumferential direction 103 First member 104 Second member 111 First magnetic core 111a First side surface 112 Second magnetic core 112a Second side surface 112b, 121b End surface 112c, 121c, 1131a, 1231a, 1211 portion 121 3rd magnetic core 113 5th magnetic core 121a 3rd side surface 122 4th magnetic core 122a 4th side surface 123 6th magnetic core 431,432 thin part 1131,1231 surface w1, w2 distance S111, S112 , S121, S122, S41, S42

Claims (30)

A plurality of first teeth (11) having first and second magnetic cores (111, 112);
A plurality of second teeth (12) having third and fourth magnetic cores (121, 122),
The first and third magnetic cores are alternately arranged around the central axis (91) in a circular manner along the circumferential direction (93), and at the same position in one direction (92) along the central axis. Yes,
The second and fourth magnetic cores are provided on the one-direction side with respect to the first and third magnetic cores, respectively, and are in the same position in the one direction,
The first magnetic core has a first side surface (111a) that is convexly curved on the third magnetic core side adjacent to the first magnetic core along the circumferential direction;
The second magnetic core has a second side surface (112a) which is on the side of the fourth magnetic core adjacent to the second magnetic core along the circumferential direction and curves concavely, and has an outer periphery with respect to the first magnetic core. Projecting to at least one of the side and the inner peripheral side,
The third magnetic core has a third side surface (121a) which is concavely curved on the first magnetic core side adjacent to the third magnetic core along the circumferential direction, and has an outer periphery with respect to the fourth magnetic core. Projecting to at least one of the side and the inner peripheral side,
The fourth magnetic core is an armature magnetic core having a fourth side surface (122a) that is convexly curved on the second magnetic core side adjacent to the fourth magnetic core along the circumferential direction.   2. The armature according to claim 1, wherein a shape of the third side surface (121 a) when viewed from the one direction (92) is substantially the same as a shape obtained by similarly expanding the shape of the first side surface (111 a). core.   The shape of the second side surface (112a) when viewed from the one direction (92) is substantially the same as the shape obtained by similarly expanding the shape of the fourth side surface (122a). Armature magnetic core.   At any position on the first side surface (111a), a distance along the circumferential direction between the third side surface (121a) adjacent to the first side surface in the circumferential direction (93) ( The armature core according to any one of claims 1 to 3, wherein w1) is the same.   In any position of the fourth side surface (122a), a distance along the circumferential direction between the second side surface (112a) adjacent to the fourth side surface in the circumferential direction (93) ( The armature core according to any one of claims 1 to 4, wherein w2) is the same.   The cross-sectional area (S111) with respect to the one direction (92) of the first magnetic core (111) is substantially the same as the cross-sectional area (S112) with respect to the one direction of the second magnetic core (112). The armature core according to any one of claims 1 to 5.   The cross-sectional area (S121) with respect to the one direction of the third magnetic core (121) and the cross-sectional area (S122) with respect to the one direction of the fourth magnetic core (122) are substantially the same. Item 7. The armature core according to any one of Items 6 to 7. The first tooth (11) further includes a fifth magnetic core (113) between the first magnetic core (111) and the second magnetic core (112),
The cross section of the fifth magnetic core with respect to the one direction (92) includes both of the cross sections of the first and second magnetic cores (111, 112) with respect to the one direction,
The armature core according to any one of claims 1 to 7, wherein the fifth magnetic core is magnetically separated from the second teeth. When viewed from the one direction (92), the edge of the fifth magnetic core (113) is
Of the edge of the first magnetic core (111), a portion outside the edge of the second magnetic core (112);
The armature magnetic core according to claim 8, comprising a portion of the edge of the second magnetic core that is outside the edge of the first magnetic core.   Of the surface (1131) of the fifth iron core (113) opposite to the first magnetic core (111), it overlaps the first magnetic core as viewed from the one direction (92), but the second core The portion (1131a) that does not overlap the magnetic core (112) recedes away from the second magnetic core along the circumferential direction (93) or in the opposite direction to the opposite side of the one direction. The armature core according to claim 9. The second tooth (12) further includes a sixth magnetic core (123) between the third magnetic core (121) and the fourth magnetic core (122),
The cross section of the sixth magnetic core with respect to the one direction (92) includes both of the cross sections of the third and fourth magnetic cores (121, 122) with respect to the one direction,
The armature core according to any one of claims 1 to 10, wherein the sixth magnetic core is magnetically separated from the first teeth. The second tooth (12) includes a sixth magnetic core (123) between the third magnetic core (121) and the fourth magnetic core (122),
A first thin portion along the circumferential direction (93),
The cross section of the sixth magnetic core in the one direction (92) includes both of the cross sections of the third and fourth magnetic cores (121, 122) in the one direction,
The fifth and sixth magnetic cores (113, 123) belonging to each of the first and second teeth (11, 12) adjacent in the circumferential direction are mutually connected to the first thin portion. The armature magnetic core according to claim 8, wherein the armature cores are connected together by the armature. When viewed from the one direction (92), the edge of the sixth magnetic core (123) is
Of the edge of the third magnetic core (121), a portion outside the edge of the fourth magnetic core (122);
The armature magnetic core according to claim 11 or 12, including a portion of the edge of the fourth magnetic core that is outside the edge of the third magnetic core.   Of the surface (1231) of the sixth iron core (123) opposite to the fourth magnetic core (122), the third magnetic core overlaps with the fourth magnetic core as viewed from the one direction (92). The portion (1231a) that does not overlap the magnetic core (121) of the magnetic core (121) retreats toward the one-direction side as it moves away from the third magnetic core along the circumferential direction (93) or the opposite direction. Item 14. The armature core according to any one of Items 13.   About the end surface (112b) on the first magnetic core (111) side of the second magnetic core (112), a portion (112c) overlapping the first magnetic core when viewed from the one direction (92) is another portion. 15. The armature core according to claim 1, wherein the armature core is retracted in the one direction with respect to the armature.   Regarding the end surface (121b) on the fourth magnetic core (122) side of the third magnetic core (121), a portion (121c) overlapping the fourth magnetic core when viewed from the one direction (92) is another portion. The armature core according to any one of claims 1 to 15, wherein the armature is retracted to a side opposite to the one direction. The first tooth (11) further includes a first magnetic plate (41) provided from the one direction (92),
The cross-sectional area (S41) with respect to the one direction of the first magnetic plate is the first and second magnetic cores (111, 112) belonging to the first teeth on which the first magnetic plate is provided. Greater than any of the cross-sectional areas (S111, S112) for each of the one direction,
The said 1st magnetic board is magnetically isolate | separated with the said 2nd teeth (12) adjacent to the said 1st teeth in which it is provided along the said circumferential direction (93). The armature core according to any one of claims 16 to 16. A second magnetic plate (42) provided on the second tooth (12) from the one direction (92);
The cross-sectional area (S42) with respect to the one direction of the second magnetic material plate is the third and fourth magnetic cores (121, 122) belonging to the second teeth on which the second magnetic material plate is provided. Greater than any of the cross-sectional areas (S121, S122) for each of the one direction,
The second magnetic material plate is magnetically separated from the first tooth (11) adjacent to the second tooth on which the second magnetic material plate is provided along the circumferential direction (93). The armature core according to claim 17. A second magnetic plate (42) provided from the one direction (92) on the second tooth (12);
A second thin portion (431) along the circumferential direction (93),
The cross-sectional area (S42) with respect to the one direction of the second magnetic material plate is the third and fourth magnetic cores (121, 122) belonging to the second teeth on which the second magnetic material plate is provided. Greater than any of the cross-sectional areas (S121, S122) for each of the one direction,
The first and second magnetic plates (41, 42) provided in the first and second teeth (11, 12) adjacent to each other along the circumferential direction are mutually connected to the second. The armature magnetic core according to claim 17, wherein the cores are connected at a thin portion. The first tooth (11) further includes a third magnetic plate (43) provided from a direction opposite to the one direction (92),
The cross-sectional area of the third magnetic body plate in the one direction is the respective cross-sectional area of the first and second magnetic cores (111, 112) belonging to the first tooth on which the third magnetic body plate is provided. Greater than any of the cross-sectional areas (S111, S112) in the one direction;
The third magnetic plate is magnetically separated from the second teeth (12) adjacent to the first teeth on which the third magnetic plates are provided along the circumferential direction (93). The armature core according to any one of claims 19 to 19. The second tooth (12) further includes a fourth magnetic plate (44) provided in a direction opposite to the one direction (92),
The cross-sectional area of the fourth magnetic plate with respect to the one direction is such that each of the third and fourth magnetic cores (121, 122) belonging to the second teeth provided with the fourth magnetic plate is provided. It is larger than any of the cross-sectional areas (S121, S122) with respect to the one direction,
The fourth magnetic plate is magnetically separated from the first teeth (11) adjacent to the second teeth on which the fourth magnetic plates are provided along the circumferential direction (93). The armature core according to claim 20. A fourth magnetic plate (44) provided on the second tooth (12) from a direction opposite to the one direction (92);
A third thin portion (432) along the circumferential direction (93),
The cross-sectional area of the fourth magnetic plate with respect to the one direction is such that each of the third and fourth magnetic cores (121, 122) belonging to the second teeth provided with the fourth magnetic plate is provided. It is larger than any of the cross-sectional areas (S121, S122) with respect to the one direction,
The third and fourth magnetic plates (43, 44) provided in each of the first and second teeth (11, 12) adjacent in the circumferential direction are mutually connected to the third. The armature core according to claim 20, wherein the armature cores are connected at a thin portion.   The first and second teeth (11, 12) both further comprise a yoke (5) provided from the one direction (92) side, according to any one of claims 1 to 19. Armature magnetic core.   The armature core according to claim 23, wherein only the yoke (5) and the first and third magnetic cores (111, 121) are integrally formed. The yoke (5) has a plurality of magnetic bodies (51) connected along the circumferential direction (93) around the central axis (91),
Only one of the first teeth (11) is provided on one of the magnetic bodies adjacent along the circumferential direction,
24. The armature magnetic core according to claim 23, wherein only one second tooth (12) is provided on the other of the magnetic bodies.   The at least one portion (1211) on the outer peripheral side and the inner peripheral side of the third magnetic core (121) overlaps the first magnetic core (111) when viewed from the central axis (91). The armature core according to any one of claims 25 to 25.   The at least one of the outer peripheral side and the inner peripheral side of the second magnetic core (112) overlaps the fourth magnetic core (122) when viewed from the central axis (91). 26. The armature core according to any one of 26. The armature core (1) according to any one of claims 1 to 27;
An armature comprising windings (31, 32) arranged one by one on each of the first magnetic core (111) and the fourth magnetic core (122). A third magnetic plate (43) provided on the first tooth (11) from the side opposite to the one direction (92);
A fourth magnetic plate (44) provided on the second tooth (12) from the side opposite to the one direction (92);
A third thin portion along the circumferential direction (93),
The cross-sectional area of the third magnetic body plate in the one direction is the respective cross-sectional area of the first and second magnetic cores (111, 112) belonging to the first tooth on which the third magnetic body plate is provided. Greater than any of the cross-sectional areas (S111, S112) in the one direction;
The cross-sectional area of the fourth magnetic plate with respect to the one direction is such that each of the third and fourth magnetic cores (121, 122) belonging to the second teeth provided with the fourth magnetic plate is provided. Larger than any of the cross-sectional areas (S121, S122) in the one direction;
The third and fourth magnetic plates (43, 44) provided in each of the first and second teeth (11, 12) adjacent in the circumferential direction are mutually connected to the third. Connected at the thin section of
Armature core (1) according to claim 19,
A method of manufacturing an armature having windings (31, 32) arranged one by one on each of the first magnetic core (111) and the fourth magnetic core (122),
(A) Of the first and third magnetic plates (41, 43), the windings (1) are wound around the first magnetic core belonging to the first teeth connected only to the third magnetic plate. 31) winding to obtain a first member (103);
(B) Of the second and fourth magnetic plates (42, 44), the winding (4) is wound around a fourth magnetic core belonging to the second tooth connected only to the second magnetic plate. 32) to obtain a second member (104);
(C) With respect to the first member obtained in the step (a), the first tooth is directed toward one direction, and the second member obtained in the step (b) Connecting the first and second members to each other with the second teeth facing toward the first member,
In the step (c), the first teeth belonging to the first member are connected to the first magnetic plate belonging to the second member, and the second teeth belonging to the second member. Is a method of manufacturing an armature connected to the fourth magnetic plate belonging to the first member. The armature magnetic core (1) according to claim 19, wherein both the first and second teeth (11, 12) further include a yoke (5) provided from the one-direction side;
A method of manufacturing an armature having windings (31, 32) arranged one by one on each of the first magnetic core (111) and the fourth magnetic core (122),
(A) winding the winding (31) around the first magnetic core belonging to the first tooth connected only to the yoke to obtain a first member (103);
(B) Winding the winding (32) around the fourth magnetic core belonging to the second tooth connected only to the second magnetic material plate (42), and the second member (104) Obtaining a step;
(C) With respect to the first member obtained in the step (a), the first tooth is directed toward one direction, and the second member obtained in the step (b) Connecting the first and second members to each other with the second teeth facing toward the first member,
In the step (c),
The first teeth belonging to the first member are coupled to the first magnetic plate belonging to the second member;
The second tooth belonging to the second member is the winding wound around each of the first magnetic cores belonging to the first member and adjacent in the circumferential direction (92). A method for manufacturing an armature connected to the yoke.

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