JP2008079455A - Magnetic core, armature, electric rotary machine and compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an eddy current generated in teeth and a yoke. <P>SOLUTION: An armature 100 is provided with a magnetic core 1 and a winding 13. The magnetic core 1 is provided with the yoke 11 and the teeth 12. The yoke 11 has a magnetic body plate 111 wound around a center shaft 92 along a predetermined direction 91. The teeth 12 are disposed on a surface 11a circularly along a circumferential direction 93 around the center shaft 92. The teeth 12 each have a magnetic body plate 121 wound around a shaft 94 determined for a position of each of them. The shaft 94 is substantially parallel to the predetermined direction 91. The winding wire 13 is disposed on the teeth 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a magnetic core and an armature, 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 perpendicular to the rotation axis.

  The armature includes a yoke, a tooth provided on the yoke, and a winding wound around the tooth. The field element is rotated by a rotating magnetic field generated by the armature.

  In the teeth, the magnetic flux flows along the rotation axis. Therefore, for example, when the electromagnetic steel plates laminated in the direction along the rotation axis are employed as the teeth, the magnetic flux crosses the interface of the laminated electromagnetic steel plates. For this reason, eddy currents are likely to occur in the teeth.

  For example, by adopting magnetic steel sheets stacked in a direction perpendicular to the rotation axis as teeth, the magnetic flux crossing the interface of the magnetic steel sheets is reduced, thereby reducing eddy currents. Such a technique is disclosed in Patent Document 1, for example.

  For example, a dust core may be adopted for the teeth. Even in such a case, the eddy current generated in the teeth can be reduced. Such a technique is disclosed in Patent Document 2, for example.

  In addition, Patent Document 3 discloses a technique related to the present invention.

International Publication No. 03/047070 Pamphlet JP 2005-348472 A JP 2004-7917 A

  However, according to the technique of Patent Document 1, it is difficult to form a tooth having a complicated shape. Moreover, according to the technique of Patent Document 2, the mechanical strength may be reduced.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reduce eddy currents generated in the teeth and the yoke.

  According to a first aspect of the present invention, a magnetic core includes a yoke (11) and a central axis (92) along a predetermined direction (91), annularly along a circumferential direction (93), and in a predetermined direction of the yoke. A tooth (12) disposed on the surface (11a) on the (91) side, and the yoke has a first magnetic plate (111) wound around the central axis, and the tooth Each has a second magnetic plate (121) wound around an axis (94) determined for each position, and the axis is substantially parallel to the predetermined direction.

  A magnetic core according to a second aspect of the present invention is the magnetic core according to the first aspect, wherein a length (h1) of the first magnetic plate (111) in the predetermined direction (91) is determined by itself. It is substantially the same in the winding direction.

  A magnetic core according to a third aspect of the present invention is the magnetic core according to the first or second aspect, wherein the second magnetic plate (121) has a length (h2) in the predetermined direction (91). Are substantially the same in the direction in which they are wound.

  A magnetic core according to a fourth aspect of the present invention is the magnetic core according to any one of the first to third aspects, wherein the teeth (12) are disposed at a position of the shaft (94). And the second magnetic plate (121) is wound around the core.

  A magnetic core according to a fifth aspect of the present invention is the magnetic core according to the fourth aspect, wherein the thickness (d2) of the second magnetic plate as viewed from the predetermined direction is uniform.

  A magnetic core according to a sixth aspect of the present invention is the magnetic core according to the fourth or fifth aspect, wherein the core (123) is made of a magnetic material.

  A magnetic core according to a seventh aspect of the present invention is the magnetic core according to the sixth aspect, wherein an end (1232) of the core (123) on the predetermined direction (91) side is perpendicular to the predetermined direction. It protrudes along the surface with respect to the second magnetic plate (121) wound around the core.

  The magnetic core according to an eighth aspect of the present invention is the magnetic core according to any one of the first to seventh aspects, wherein the teeth (12) are wound around the second magnetic plate ( 121) is further provided with a flange portion (124) provided at an end on the outer peripheral side surface (121b) and the predetermined direction (91) side with respect to the shaft (94), and the flange portion is magnetic. It consists of a body and protrudes with respect to the side surface in the radial direction around the axis (94).

  A magnetic core according to a ninth aspect of the present invention is the magnetic core according to the eighth aspect, wherein the flange (124) has the second magnetic body plate (121) as a core around the shaft (94). It has the 3rd magnetic body board (1241) wound.

  A magnetic core according to a tenth aspect of the present invention is the magnetic core according to the ninth aspect, wherein the third magnetic plate and the second magnetic plate (121) are formed of a single magnetic plate.

  A magnetic core according to an eleventh aspect of the present invention is the magnetic core according to any one of the first to tenth aspects, wherein the maximum permeability of the teeth (12) is a maximum permeability of the yoke (11). Greater than magnetic susceptibility.

  A magnetic core according to a twelfth aspect of the present invention is the magnetic core according to any one of the first to tenth aspects, wherein a saturation magnetic flux density of the yoke (11) is a saturation magnetic flux of the teeth (12). Greater than density.

  A magnetic core according to a thirteenth aspect of the present invention is the magnetic core according to any one of the first to twelfth aspects, wherein the second magnetic plate (121) viewed from the predetermined direction (91). ) Is smaller than the thickness (d1) of the first magnetic plate as viewed from the predetermined direction.

  A magnetic core according to a fourteenth aspect of the present invention is the magnetic core according to the thirteenth aspect, wherein the thickness (d1) of the first magnetic plate (111) is 0.2 mm or more.

  A magnetic core according to a fifteenth aspect of the present invention is the magnetic core according to the fourteenth aspect, wherein the first magnetic plate (111) is an electromagnetic steel plate.

  A magnetic core according to a sixteenth aspect of the present invention is the magnetic core according to any one of the eleventh to fifteenth aspects, wherein the thickness (d2) of the second magnetic plate (121) is 0.00. 2 mm or less.

  A magnetic core according to a seventeenth aspect of the present invention is the magnetic core according to the sixteenth aspect, wherein the second magnetic plate (121) includes an amorphous material or permalloy.

  A magnetic core according to an eighteenth aspect of the present invention is the magnetic core according to the sixteenth aspect, wherein the second magnetic plate (121) is an electromagnetic steel plate.

  A magnetic core according to a nineteenth aspect of the present invention is the magnetic core according to any one of the first to eighteenth aspects, wherein the second magnetic plate (121) is the axis of the teeth (12). After being wound around (94), the teeth are annealed.

  A magnetic core according to a twentieth aspect of the present invention is the magnetic core according to any one of the first to twentieth aspects, wherein the first magnetic plate (111) is in the yoke (11). After being wound around the central axis (92), the yoke is annealed.

  An armature according to a twenty-first aspect of the present invention includes the magnetic core (1) according to any one of the first to twentieth aspects, and a winding (13) disposed on the teeth (12). .

  A rotating electric machine according to a twenty-second aspect of the present invention includes the armature (100) according to the twenty-first aspect, and a field element arranged to face the armature from a predetermined direction (91) side.

  A rotating electric machine according to a twenty-third aspect of the present invention is the rotating electric machine according to the twenty-second aspect, wherein the field element includes a magnet.

  A rotating electric machine according to a twenty-fourth aspect of the present invention is the rotating electric machine according to the twenty-third aspect, wherein the number of poles of the field element is four.

  According to a twenty-fifth aspect of the present invention, there is provided a compressor according to the twenty-second or twenty-fourth aspect.

  According to the magnetic core according to the first aspect of the present invention, in the armature obtained by arranging the windings on the teeth, the magnetic flux flows along the circumferential direction in the yoke and flows along the predetermined direction in the teeth. . Therefore, most of the magnetic flux is an interface that expands spirally from the central axis side formed by winding the first magnetic plate, and an interface that expands spirally from the axial side formed by winding the second magnetic plate. It hardly crosses any of these. Thus, the generation of eddy currents in the magnetic core is reduced.

  According to the magnetic core according to claim 2 of the present invention, a rectangle can be adopted as the shape of the first magnetic plate before winding. Therefore, it is easy to punch out the first magnetic plate from one magnetic plate.

  According to the magnetic core according to claim 3 of the present invention, a rectangle can be adopted as the shape of the second magnetic body plate before winding. Therefore, it is easy to punch out the second magnetic plate from one magnetic plate.

  According to the magnetic core of the fourth aspect of the present invention, the second magnetic plate can be easily wound. In addition, by adopting a second magnetic plate having a uniform thickness in the cross-section with respect to the predetermined direction of the core, adopting a shape similar to the desired shape for the cross-section with respect to the predetermined direction of the teeth, The desired shape can be obtained for the cross-section of the teeth by winding the second magnetic body plate on.

  According to the magnetic core according to the fifth aspect of the present invention, a tooth having a shape similar to the shape of the core can be obtained with respect to a cross section in a predetermined direction. Therefore, by adopting a shape similar to the desired shape of the cross section of the tooth for the cross section of the core, the cross section of the tooth can be made into the desired shape.

  According to the magnetic core of the sixth aspect of the present invention, the area of the portion made of the magnetic material is increased in the cross section of the teeth in the predetermined direction. Therefore, the magnetic resistance in a predetermined direction of the teeth is reduced, and thus the magnetic flux easily flows along the predetermined direction in the teeth.

  According to the magnetic core according to claim 7 or claim 8 of the present invention, in an armature obtained by winding a winding around a tooth, most of the magnetic flux flowing in a predetermined direction of the armature is linked to the winding. Can be made.

  According to the magnetic core according to claim 9 of the present invention, it is easy to form the flange portion.

  According to the magnetic core concerning Claim 10 of this invention, the tooth | gear which has a collar part can be formed only by winding one magnetic body board.

  According to the magnetic core according to the eleventh aspect of the present invention, the iron loss can be reduced with respect to the teeth whose change in magnetic flux density is larger than that of the yoke. Moreover, since the magnetic resistance in the predetermined direction is small, the magnetic flux easily flows along the predetermined direction in the teeth.

  According to the magnetic core of the twelfth aspect of the present invention, magnetic saturation can be prevented in the yoke where the magnetic flux density tends to be larger than that of the teeth.

  According to the magnetic core of the thirteenth aspect of the present invention, since the thickness of the first magnetic plate is larger than that of the second magnetic plate in relation to the second magnetic plate, the strength of the yoke is increased. Rise. In terms of the relationship between the second magnetic plate and the first magnetic plate, the thickness of the second magnetic plate is smaller than that of the first magnetic plate, so that the second magnetic plate can be easily wound.

  According to the magnetic core of the fourteenth aspect of the present invention, a high strength yoke can be obtained.

  According to the magnetic core of the fifteenth aspect of the present invention, the iron loss can be reduced without lowering the strength.

  According to the magnetic core of the sixteenth aspect of the present invention, it is easy to wind the second magnetic plate.

  According to the magnetic core of the seventeenth aspect of the present invention, the thickness of the second magnetic plate can be easily reduced to 0.2 mm or less.

  According to the magnetic core of the eighteenth aspect of the present invention, the iron loss can be reduced without lowering the strength.

  According to the magnetic core of the nineteenth aspect of the present invention, it is possible to reduce the residual stress caused by the winding of the second magnetic plate, thereby preventing the deterioration of the magnetic characteristics.

  According to the magnetic core of the twentieth aspect of the present invention, it is possible to reduce the residual stress caused by the winding of the first magnetic plate, thereby preventing the deterioration of the magnetic characteristics.

  According to the armature of the present invention, the rotating magnetic field can be generated efficiently.

  According to the rotating electrical machine of the twenty-second aspect of the present invention, torque can be generated efficiently.

  According to the rotary electric machine according to claim 23 or claim 24 of the present invention, the output of the rotary electric machine can be increased.

  According to the compressor concerning Claim 25 of this invention, a refrigerant | coolant can be compressed.

1. FIG. 1 conceptually shows an armature 100 according to an embodiment of the present invention. The armature 100 includes a magnetic core 1 and a winding 13. In FIG. 1, the magnetic core 1 and the winding 13 are shown separately in a predetermined direction 91.

  The magnetic core 1 includes a yoke 11 and a tooth 12.

  FIG. 2 conceptually shows a cross section of the yoke 11 in a predetermined direction 91. The yoke 11 has a magnetic plate 111 wound around a central axis 92 along a predetermined direction 91, and has a surface 11a (FIG. 1) on the predetermined direction 91 side. In FIG. 2, the magnetic plate 111 is not wound around the central axis 92, and the yoke 11 has an annular shape. However, the magnetic plate 111 is also wound around the central axis 92, and the yoke The shape of 11 may be a disk shape.

  The length h1 (FIG. 1) in the predetermined direction 91 of the magnetic plate 111 is desirably substantially the same in the direction in which the magnetic plate 111 is wound. This is because a rectangular shape can be adopted as the shape of the magnetic body plate 111 before winding, so that it is easy to punch out the magnetic body plate 111 from one magnetic body plate.

  The teeth 12 are arranged on the surface 11 a in a ring shape along the circumferential direction 93 around the central axis 92.

  FIG. 3 conceptually shows a cross section of the tooth 12 with respect to a predetermined direction 91. Each of the teeth 12 has a magnetic plate 121 wound around an axis 94 determined for each position. The shaft 94 is substantially parallel to the predetermined direction 91.

  Similarly to the magnetic plate 111, the length h2 (FIG. 1) in the predetermined direction 91 is preferably substantially the same in the direction in which the magnetic plate 121 is wound.

  Each of the magnetic plates 111 and 121 is preferably annealed after being wound. This is because the residual stress generated by winding the magnetic plates 111 and 121 can be reduced, thereby preventing the deterioration of magnetic characteristics.

  From the viewpoint of preventing looseness of the wound magnetic plates 111 and 121, it is desirable to bond or mold the wound magnetic plates 111 and 121, for example. Steel plates whose surfaces are covered with an adhesive film may be used as the magnetic plates 111 and 121. Further, with respect to the magnetic material plate 121, a wound one may be fitted into a coil bobbin, or the winding 13 may be directly wound around the wound one.

  Winding 13 is arranged on teeth 12. In FIG. 1, concentrated winding is adopted as the winding method of the winding 13. According to such a winding method, the winding 13 can be easily wound around the teeth 12. In addition, copper loss can be reduced. The winding 13 may be wound by distributed winding or wave winding.

  According to such an armature, the magnetic flux flows along the circumferential direction 93 in the yoke 11 and flows along the predetermined direction 91 in the tooth 12. Therefore, most of the magnetic flux is spirally formed from the axis 111 formed by winding the interface 111a (FIG. 2) and the magnetic plate 121 wound from the central axis 92 formed by winding the magnetic plate 111. Almost no extending interface 121a (FIG. 3) is traversed. Thus, the generation of eddy currents in the magnetic core 1 is reduced. In addition, the rotating magnetic field can be efficiently generated in the armature 100.

  4 and 5 conceptually show a cross section with respect to a predetermined direction 91 for the tooth 12 having a different aspect from that of FIG. The tooth 12 has a core 123. The core 123 is disposed at the position of the shaft 94 and extends along the shaft 94. The magnetic plate 121 is wound around the core 123.

  According to the tooth 12, the magnetic plate 121 can be easily wound. In particular, in FIG. 5, a groove 1223 is provided in the core 123. At the start of winding the magnetic plate 121 around the core 123, the magnetic plate 121 is hooked in the groove 1223. Thereby, winding of the magnetic body plate 121 around the core 123 becomes easier. Moreover, since the magnetic plate 121 can be wound around the core 123 while applying tensile stress, the space factor of the core is increased.

  For the cross section of the core 123 in the predetermined direction 91, it is desirable to adopt a shape similar to the desired shape for the cross section of the tooth 12 in the predetermined direction 91. This is because a magnetic plate 121 having a uniform thickness d2 (FIG. 3) viewed from a predetermined direction 91 is employed and wound around the core 123, whereby the desired shape of the cross section of the tooth 12 is obtained. Because it is. Such an embodiment is illustrated, for example, in FIG.

  The core 123 is preferably made of a magnetic material in that the magnetic resistance in the predetermined direction 91 of the tooth 12 is reduced, and the magnetic flux easily flows along the predetermined direction 91 in the tooth 12. This is because the area of the portion made of a magnetic material increases in the cross section of the tooth 12 in the predetermined direction 91. In particular, it is desirable to use a ferromagnetic material for the core 123. For example, an iron lump or a dust core can be used.

  FIG. 6 conceptually shows the case where the magnetic plate 125 is provided on the tooth 12 shown in FIG. The magnetic plate 125 is made of, for example, a dust core. In FIG. 6, only the portion where the tooth 12 is provided is shown for the yoke 11, and the magnetic plate 125, the tooth 12 and the yoke 11 are shown separately from each other in a predetermined direction 91.

  The magnetic plate 125 is provided from the teeth 12 in a predetermined direction 91 side, that is, from the side opposite to the yoke 11. At this time, the magnetic plate 125 may be fixed to only one of the core 123 and the wound magnetic plate 121, or may be fixed to both of them. In addition, by providing the groove | channel which engages the teeth 12 in the magnetic body board 125, fixation to the teeth 12 of the magnetic body board 125 becomes easy.

  The area of the cross section with respect to the predetermined direction 91 of the magnetic body plate 125 is larger than the area of the cross section with respect to the predetermined direction 91 of the teeth 12.

  In this content, when the magnetic body plate 125 is fixed only to the core 123 and the core 123 is made of a magnetic body, it can be grasped as follows. In other words, the end portion 1232 on the predetermined direction 91 side of the core 123 protrudes with respect to the magnetic body plate 121 wound around the core 123 along a plane perpendicular to the predetermined direction 91.

  According to this aspect, most of the magnetic flux flowing in the predetermined direction 91 side of the armature 100 can be linked to the winding 13. In addition, the space factor of the windings 13 wound around the teeth 12 can be increased. Furthermore, torque ripple can be reduced in a rotating electric machine obtained by providing a field element in the armature 100. Further, since the tooth 12 is sandwiched between the magnetic plate 125 and the yoke 11 from both sides in the predetermined direction 91, loosening of the wound magnetic plate 121 is prevented. The magnetic plate 125 may be provided, for example, with respect to the teeth 12 shown in FIGS. 3 and 5, and the same effect can be obtained.

  FIG. 7 conceptually shows the case where the tooth 12 shown in FIG. The flange portion 124 is provided on the end of the wound magnetic material plate 121 on the outer peripheral side surface 121b with respect to the shaft 94 and on the predetermined direction 91 side. The flange portion 124 is made of a magnetic material, and protrudes from the side surface 121b in the radial direction about the shaft 94.

  Also in this aspect, most of the magnetic flux flowing in the predetermined direction 91 side of the armature 100 can be linked to the winding 13.

  In particular, FIG. 7 shows a case where the collar portion 124 is made of a magnetic plate 1241. Specifically, the magnetic plate 1241 is wound around the shaft 94 around the magnetic plate 121. This content can be grasped by using different magnetic plates 121 and 1241 for each portion having the same width in the winding direction in the direction. According to this aspect, formation of a collar part is easy.

  As shown in FIG. 7, the magnetic plate 121 and the magnetic plate 1241 may be composed of a single magnetic plate. This is because the tooth 12 having the flange portion 124 can be formed only by winding a single magnetic plate.

2. Regarding Relationship between Yoke and Teeth (1) Material The maximum permeability of the teeth 12 is preferably larger than the maximum permeability of the yoke 11. This is because the magnetic resistance generated in the tooth 12 is small, so that the magnetic flux easily flows in the tooth 12.

  In addition, the eddy current can be reduced in the teeth 12 where the change in magnetic flux density is larger than that of the yoke 11. Such a change in magnetic flux density is caused by, for example, rotation of a field element provided in the armature 100, PWM (Pulse Width Modulation) control executed by the armature 100, or the like. Note that the eddy current generated by the PWM control is easily induced by the carrier frequency component of the magnetic flux density.

  FIG. 8 is a graph showing changes in the magnetic flux density of the magnetic flux flowing through the teeth 12 with respect to the rotation angle of the field element. Such a graph is obtained by calculation using a finite element method. The field element is provided from a predetermined direction 91 with respect to the armature 100. According to the graph shown in FIG. 8, the graph includes a waveform close to a triangular wave shape. However, when the rotation angle is in the range of 15 ° to 30 ° and 60 ° to 75 °, the shape of the graph deviates from the triangular wave shape. I understand that. That is, the magnetic flux density contains many high-order frequency components with respect to the fundamental wave.

  The saturation magnetic flux density of the yoke 11 is desirably larger than the saturation magnetic flux density of the teeth 12. This is because the magnetic flux density is likely to be larger than that of the tooth 12, and magnetic saturation is prevented from occurring in the yoke 11 where the magnetic flux density is long.

  FIG. 9 is a graph showing actually measured values of the magnetic flux density of the magnetic flux flowing in the yoke 11 with respect to the rotation angle of the field element. According to the graph shown in FIG. 9, it can be seen that a magnetic flux density of 1.0 (T) or more can be obtained when the rotation angle is in the range of 30 ° to 60 °. Specifically, a magnetic flux density of 1.2 (T) is obtained almost constant in the range. That is, the magnetic flux density is large in a wide range of rotation angles.

  Therefore, compared to the magnetic flux flowing in the teeth 12, the magnetic flux flowing in the yoke 11 can obtain a higher magnetic flux density in a wide range of rotation angles, and therefore higher-order frequencies included in the magnetic flux density. There are few ingredients.

(2) Regarding the thickness of the magnetic plate It is desirable that the thicknesses d1 and d2 (FIGS. 2 and 3) of the magnetic plates 111 and 121 (FIGS. 2 and 3) viewed from the predetermined direction 91 are small. This is because the magnetic plates 111 and 121 can be wound with a weak tension, so that the winding speed can be increased, thereby shortening the process time required for the winding.

  The thickness d2 of the magnetic plate 121 is preferably smaller than the thickness d1 of the magnetic plate 111 (Aspect A).

  If the aspect A is seen in relation to the magnetic plate 121 of the magnetic plate 111, the thickness d1 of the magnetic plate 111 is larger than the thickness d2 of the magnetic plate 121, so that the strength of the yoke 11 is increased. Therefore, even if the yoke 11 is fixed inside the sealed container by press fitting or shrink fitting, the yoke 11 is not easily deformed.

  From the viewpoint of increasing the strength of the yoke 11, the thickness d1 of the magnetic plate 111 is preferably 0.2 (mm) or more. A more desirable thickness d1 is 0.35 (mm) or more. For example, the magnetic plates 111 can be easily connected to each other by Karamase. However, the thickness d1 is preferably 0.5 (mm) or less from the viewpoint of preventing the deterioration of the magnetic characteristics.

  By adopting an electromagnetic steel plate as the magnetic material plate 111, it is possible to reduce iron loss, particularly hysteresis loss, without reducing the strength. From the viewpoint of reducing iron loss, it is desirable to include silicon in the electrical steel sheet.

  Further, when the above-mentioned aspect A is seen in relation to the magnetic plate 111 of the magnetic plate 121, the thickness d2 of the magnetic plate 121 is smaller than the thickness d1 of the magnetic plate 111. Easy.

  Details are as follows. The magnetic plates 111 and 121 are more difficult to wind as the winding radius decreases. Since the teeth 12 are thinner than the yoke 11, the winding radius of the magnetic plate 121 is smaller than the winding radius of the magnetic plate 111. Then, if the thickness d2 is equal to or greater than the thickness d1, the magnetic plate 121 is less likely to be wound than the magnetic plate 111. However, by making the thickness d2 smaller than the thickness d1, the magnetic plate 121 can be easily wound.

  Moreover, it is possible to reduce eddy currents that occur in the teeth 12 that contain many high-order frequency components in the magnetic flux density. In particular, it is desirable to reduce the thickness d2 of the magnetic plate 121 in that the induction of eddy currents due to the carrier frequency component can be suppressed.

  From the viewpoint of facilitating winding of the magnetic plate 121 and reducing the eddy current, the thickness d2 of the magnetic plate 121 is preferably 0.2 (mm) or less. By including an amorphous material or permalloy in the material of the magnetic plate 121, the thickness d2 can be reduced to 0.2 (mm) or less, and eddy current loss can be significantly reduced. Specifically, the magnetic material plate 121 formed of an amorphous material can reduce the thickness d2 to 0.025 (mm). Further, the magnetic plate 121 formed of permalloy can reduce the thickness d2 to 0.05 (mm).

  An electromagnetic steel plate may be adopted as the magnetic plate 121. Since the electrical steel sheet has a lower hardness than a magnetic plate formed of amorphous or permalloy, it has a high strength against bending. Furthermore, iron loss, especially hysteresis loss can be reduced. From the viewpoint of reducing iron loss, it is desirable to include silicon in the electrical steel sheet. In addition, as for the thickness d2 of the electromagnetic steel plate employ | adopted as the magnetic body board 121, it is desirable that it is 0.1-0.2 (mm).

3. Manufacturing Method FIG. 10 illustrates a manufacturing method of the armature 100 in which the tooth 12 has the core 123. In FIG. 10, only the portion where the teeth 12 are provided is shown for the yoke 11, and the core 123, the magnetic material plate 121, the winding 13 and the yoke 11 are shown separated from each other.

  The core 123 includes a portion 1231a around which the magnetic plate 121 is wound and a portion 1231b that holds the portion 1231a. According to this aspect, even if the core 123 has a complicated shape, the core 123 can be easily obtained. Note that the portion 1231a and the portion 1231b can be coupled by press-fitting, adhesion, molding, or the like, for example.

  After holding the portion 1231a on the portion 1231b to obtain the core 123, the teeth 12 are obtained by winding the magnetic plate 121 around the core 123.

  After winding the winding wire 13 around the tooth 12, the tooth 12 is fixed to the surface 11 a of the yoke 11. For example, after fixing the tooth 12 to the surface 11 a of the yoke 11, the winding 13 may be wound around the tooth 12.

  FIG. 11 conceptually shows a manufacturing method of the armature 100 different from the manufacturing method described above. In the armature 100, the yoke 11 includes a magnetic plate 111 and a magnetic plate 112.

  The magnetic plate 112 is provided on the surface 111 a on the predetermined direction 91 side of the wound magnetic plate 111, and is divided into two or more in the circumferential direction 93. In FIG. 11, the magnetic plate 112 is divided into the same number as the number of teeth 12 (part 1121), and the teeth 12 are provided in any of the parts 1121.

  For each portion 1121, the tooth 12 is fixed to the portion 1121 and the winding 13 is wound around the tooth 12.

  And the part 1121 in which the tooth 12 and the coil | winding 13 were provided is arrange | positioned along the circumferential direction 93 around the central axis 92, and is mutually connected. For example, the portion 1121 may be repeatedly connected to the certain portion 1121 in the circumferential direction 93 side.

  According to this manufacturing method, the winding 13 can be wound around the teeth 12 for each portion 1121, so that the winding 13 can be easily wound.

  From the viewpoint of facilitating connection between the portions 1121, it is desirable that one of the portions where the portions 1121 are connected to each other has a convex shape and the other has a concave shape. Such uneven shape can also be used for positioning when connecting the portions 1121. For example, a wedge shape can be adopted as the uneven shape.

  Manufacturing the armature 100 in this manner is particularly desirable when the magnetic plate 125 is provided on the tooth 12 (FIG. 6). This is because it is easy to wind the winding wire 13 even after the magnetic plate 125 is provided on the tooth 12 provided in the portion 1121 from the side opposite to the portion 1121. Similarly, it is also desirable when the tooth 12 has a collar portion 124 (FIG. 7).

  The area of the magnetic plate 112 viewed from the predetermined direction 91 is desirably larger than the area of the wound magnetic plate 111 viewed from the predetermined direction 91. This is because the wound magnetic body plate 111 can be fixed to the container via the magnetic body plate 112, so that deformation of the wound magnetic body plate 111 is prevented.

  From the same viewpoint, the magnetic plate B may be provided on the surface 111b of the wound magnetic plate 111 opposite to the magnetic plate 112. The area of the magnetic plate B viewed from the predetermined direction 91 is larger than the area of the wound magnetic plate 111 viewed from the predetermined direction 91. Both of the magnetic plates 112 and B may be provided on the magnetic plate 111, or only one of them may be provided on the magnetic plate 111.

  When the magnetic plate 111 is fixed to the container via the magnetic plates 112 and B, a groove into which the wound magnetic plate 111 is fitted on the surface of the magnetic plates 112 and B on the magnetic plate 111 side. It is desirable to provide This is because the wound magnetic plate 111 can be fixed to the magnetic plates 112 and B.

  The magnetic plate 112 can be provided with a housing for holding a bearing. In this aspect, in the rotating electrical machine obtained by providing the armature 100 with the rotor from the predetermined direction 91, even if an attractive force is generated between the rotor and the armature 100, the bearing does not come off.

  FIGS. 12 and 13 conceptually show an aspect in which the teeth 12 and the windings 13 are provided for each portion 1121. 12 and 13 relate to the armature 100 including the tooth 12 having the core 123. FIG.

  In FIG. 12, the core 123 has portions 1231 and 1232. A magnetic plate 121 is wound around the portion 1231. The part 1232 is provided in the part 1231 from the side opposite to the predetermined direction 91.

  The portion 1121 has a groove 113 into which the portion 1232 is fitted in the surface 1121a on the predetermined direction 91 side. The groove 113 may penetrate the portion 1121, and such an embodiment is shown in FIG.

  According to such a tooth 12, since the tooth 12 can be fixed to the portion 1121 by fitting the portion 1232 into the groove 113, manufacture is easy. Moreover, the groove 113 can be used for positioning the teeth 12.

  The teeth 12 can be positioned by the following method. That is, a method of performing molding with the teeth 12 provided on the surface 11a of the yoke 11 at a predetermined position, or a resin in which the resin between the teeth 12 and the windings 13 is molded into a desired shape (resin molded product) ) Is provided on the surface 11a of the yoke 11, and a method of positioning with a resin molding can be employed.

  FIG. 12 shows a case where the portion 1232 extends along a plane perpendicular to the predetermined direction 91 as compared with the portion 1231 in particular. According to such a shape, the magnetic plate 121 wound around the portion 1231 does not come out from the portion 1232 side of the core 123. Furthermore, the winding 13 can be prevented from coming off from the teeth 12.

  In FIG. 12, a magnetic plate 125 is provided from a predetermined direction 91 with respect to the core 123. According to the magnetic plate 125, the magnetic plate 121 wound around the portion 1231 does not come out of the core 123 from the magnetic plate 125 side.

  The portion 1231 may be composed of a portion 1231a around which the magnetic plate 121 is wound and a portion 1231b that holds the portion 1231a. This mode is illustrated in FIG. According to this aspect, even if the core 123 has a complicated shape, the core 123 can be easily formed. Note that the portion 1231a and the portion 1231b can be coupled by press-fitting, adhesion, molding, or the like, for example.

4). About the structure of a rotary electric machine A rotary electric machine can be comprised with the armature 100 mentioned above and a field element. The field element is provided to face the armature 100 from the predetermined direction 91 side. According to such a rotating electric machine, torque can be generated efficiently.

  The field element has a pole, for example, having a magnet. For example, 4 can be adopted as the number of poles. The field element can be a surface magnet type or an embedded magnet type. According to this field element, the output of the rotating electrical machine can be increased.

  The rotating electrical machine described above can be mounted on a compressor, for example. According to such a compressor, the refrigerant can be efficiently compressed. In particular, with regard to the magnetic flux flowing in a predetermined direction, by using a material having a high saturation magnetic flux density and a high magnetic permeability and a small iron loss, an operating efficiency equivalent to or higher than that of a conventional compressor can be obtained. Contributes to energy saving of equipment.

1 is a perspective view conceptually showing an armature according to the present invention. 3 is a diagram conceptually showing a cross section of a yoke 11 in a predetermined direction 91. FIG. It is a figure which shows notionally the cross section with respect to the predetermined direction 91 of the teeth 12. FIG. It is a figure which shows notionally the cross section with respect to the predetermined direction 91 of the teeth 12. FIG. It is a figure which shows notionally the cross section with respect to the predetermined direction 91 of the teeth 12. FIG. It is a perspective view which shows notionally the teeth 12 with which the magnetic body board 125 was provided. It is a perspective view which shows notionally the teeth 12 in which the collar part 124 was provided. It is a figure which shows the change with respect to the rotation angle of magnetic flux density about the teeth 12. FIG. It is a figure which shows the change with respect to the rotation angle of magnetic flux density about the yoke 11. FIG. It is a figure which shows notionally the manufacturing method of an armature. It is a figure which shows notionally the manufacturing method of an armature. It is a figure which shows one of the part 1121 in which a tooth | gear and a coil | winding are provided. It is a figure which shows one of the part 1121 in which a tooth | gear and a coil | winding are provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic core 11 Yoke 11a Surface 12 Teeth 13 Winding 91 Predetermined direction 92 Center axis 93 Circumferential direction 94 Axis 100 Armature 111,121,1241 Magnetic body plate 121b Side surface 123 Core 124 Gutter part 1232 End part h1, h2 Length d1 , D2 thickness

Claims (25)

York (11),
Teeth (12) disposed on the surface (11a) on the side of the predetermined direction (91) of the yoke in an annular shape along the circumferential direction (93) around the central axis (92) along the predetermined direction (91) And
The yoke has a first magnetic plate (111) wound around the central axis,
Each of the teeth has a second magnetic plate (121) wound around an axis (94) determined for each position,
The axis is substantially parallel to the predetermined direction;
core.   The magnetic core according to claim 1, wherein a length (h1) of the first magnetic plate (111) in the predetermined direction (91) is substantially the same in a direction in which the first magnetic plate (111) is wound.   The magnetic core according to claim 1 or 2, wherein a length (h2) of the second magnetic plate (121) in the predetermined direction (91) is substantially the same in a direction in which the second magnetic plate (121) is wound. . The teeth (12) have a core (123) arranged at the position of the axis (94) and extending along the axis,
The second magnetic plate (121) is wound around the core.
The magnetic core according to any one of claims 1 to 3.   The magnetic core according to claim 4, wherein a thickness (d2) of the second magnetic plate as viewed from the predetermined direction is uniform.   The magnetic core according to claim 4 or 5, wherein the core (123) is made of a magnetic material.   The end (1232) on the predetermined direction (91) side of the core (123) has a second magnetic plate (121) wound around the core along a plane perpendicular to the predetermined direction. The magnetic core according to claim 6, wherein the magnetic core protrudes with respect to (). The teeth (12)
A flange portion provided on an end of the wound side of the second magnetic body plate (121) on the outer peripheral side surface (121b) and the predetermined direction (91) side with respect to the shaft (94). 124)
Further comprising
The flange portion is made of a magnetic material and protrudes from the side surface in the radial direction centered on the shaft (94).
The magnetic core according to any one of claims 1 to 7.   The said collar part (124) has a 3rd magnetic body board (1241) wound around the said axis | shaft (94) centering | focusing on the said 2nd magnetic body board (121). core.   The magnetic core according to claim 9, wherein the third magnetic plate and the second magnetic plate (121) are made of a single magnetic plate.   The magnetic core according to any one of claims 1 to 10, wherein a maximum permeability of the teeth (12) is larger than a maximum permeability of the yoke (11).   The magnetic core according to any one of claims 1 to 10, wherein a saturation magnetic flux density of the yoke (11) is larger than a saturation magnetic flux density of the teeth (12).   The thickness (d2) of the second magnetic plate (121) viewed from the predetermined direction (91) is smaller than the thickness (d1) of the first magnetic plate viewed from the predetermined direction. The magnetic core according to any one of claims 1 to 12.   The magnetic core according to claim 13, wherein the thickness (d1) of the first magnetic plate (111) is 0.2 mm or more.   The magnetic core according to claim 14, wherein the first magnetic plate (111) is an electromagnetic steel plate.   The magnetic core according to any one of claims 11 to 15, wherein the thickness (d2) of the second magnetic plate (121) is 0.2 mm or less.   The magnetic core according to claim 16, wherein the material of the second magnetic plate (121) includes an amorphous material or permalloy.   The magnetic core according to claim 16, wherein the second magnetic plate (121) is an electromagnetic steel plate.   19. The tooth according to claim 1, wherein the tooth is annealed after the second magnetic plate (121) is wound around the shaft (94). Magnetic core as described in.   20. The yoke according to claim 1, wherein the yoke is annealed after the first magnetic plate (111) is wound around the central axis (92). The magnetic core according to one. Magnetic core (1) according to any one of claims 1 to 20,
An armature comprising a winding (13) disposed on the teeth (12). The armature (100) according to claim 21,
A rotating electric machine comprising: a field element arranged to face the armature from a predetermined direction (91) side.   The rotating electrical machine according to claim 22, wherein the field element includes a magnet.   The rotating electrical machine according to claim 23, wherein the number of poles of the field element is four.   A compressor equipped with the rotating electrical machine according to claim 22 or 24.

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