JP4846350B2 - Linear motor - Google Patents

Description

  The present invention relates to a linear motor.

Japanese Unexamined Patent Publication No. 2001-119919 (Patent Document 1) shows a linear motor including a stator composed of a pair of inductors and a mover composed of an armature. The pair of inductors is made of a magnetic material and has a tooth part row composed of a plurality of tooth parts provided with a predetermined pitch τ in the moving direction of the mover. The armature includes an armature core having one or more facing surfaces facing the tooth row and stacked in a direction perpendicular to the moving direction of the mover, and a pitch in the moving direction on the facing surface. A permanent magnet array composed of a plurality of permanent magnets provided with τ / 2 and arranged so that different polarities appear alternately along the facing surface, and aligned in the moving direction of the mover wound around the armature core And a plurality of armature windings.
JP 2001-119919 A

  However, in the conventional linear motor, since a plurality of armature windings are arranged in the moving direction of the mover, a large number (18 in the example of Patent Document 1) requires armature windings. In addition, since the armature core is configured by laminating a plurality of steel plates in a direction orthogonal to the moving direction of the mover, a screw that penetrates the plurality of steel plates through the armature core and the member that supports the armature core, etc. It had to be fixed with, and the production was troublesome.

  An object of the present invention is to provide a linear motor that can reduce the number of armature windings.

  Another object of the present invention is to provide a linear motor that can easily fix an armature core and a member that supports the armature core.

  The linear motor to be improved by the present invention has a mover and a stator. The linear motor of the present invention includes two or more inductors and armatures made of a magnetic material. The two or more inductors each have a tooth portion row composed of a plurality of tooth portions provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction orthogonal to the moving direction. Two or more inductors are arranged in parallel in the width direction.

  The armature includes an armature core, two or more armature windings, and a plurality of permanent magnets provided with a predetermined pitch τ2 in the moving direction and arranged so that different polarities appear alternately in the moving direction. And four or more permanent permanent magnet arrays. The armature core includes three or more magnetic pole portions and two or more yoke portions that magnetically connect two adjacent magnetic pole portions. The three or more magnetic pole portions are arranged in parallel at a predetermined interval so that one inductor is located therebetween. Each of the three or more magnetic pole portions has one or two facing surfaces that face the teeth of the inductor. One of four or more permanent permanent magnet arrays is arranged on each of the one or two opposing surfaces. Two or more armature windings generate three or more magnetic poles so as to generate a magnetic flux between a plurality of permanent magnets constituting one permanent magnet row and one tooth row opposite to the permanent magnet row. Or two or more yoke portions.

  In the linear motor of the present invention, one of the two or more inductors and armatures is a mover, and the other of the two or more inductors and armatures is a stator.

  Employing the structure of the present invention provides an advantage that the number of armature windings can be reduced.

  In the linear motor of the present invention, two or more yoke portions are arranged side by side in a direction orthogonal to the moving direction of the mover (inductor width direction). Therefore, when the armature winding is wound around three or more magnetic pole portions or two or more yoke portions, the two or more armature windings can be wound in a direction extending in the moving direction of the mover. They can be arranged side by side in a direction orthogonal to the moving direction (inductor width direction). Therefore, the number of armature windings can be reduced by adjusting the size of one armature winding.

  Further, since the armature core can be configured to have the same cross section in the direction orthogonal to the moving direction of the mover, the armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction of the mover. be able to. Therefore, a fitting member that fixes the armature core to a core support member such as a movable stage can be formed on the armature core. For example, if one of the fitting concave portion and the fitting convex portion is formed on the armature core and the other of the fitting concave portion and the fitting convex portion is formed on the core support member, one of the fitting concave portion and the fitting convex portion is formed. And the other can be fitted together to fix the armature core to the core support. Therefore, the armature core and the armature core support member can be easily fixed without using a screw or the like as in the prior art.

  It is preferable that the pitch τ1 of the plurality of tooth portions of the inductor and the pitch τ2 of the plurality of permanent magnets in the permanent magnet row have a relationship of τ2 = τ1 / 2. In this way, there is an advantage that the magnetic flux generated from the surface of the permanent magnet row toward the tooth portion row of the inductor by the armature winding and the permanent magnet can be most effectively used as the thrust in the moving direction. Further, when n is the total number of permanent magnets arranged in the above moving direction and m is the number of phases, τ2 = τ1 / 2 ± τ1 / (n / m). The cogging forces generated by each other cancel each other, and there is an advantage that the cogging force can be reduced by minimizing the reduction in thrust.

  It is preferable that the plurality of permanent magnets constituting the permanent magnet row facing the tooth portion row is provided in a skewed state with respect to the plurality of tooth portions constituting the tooth portion row. In this way, the cogging force can be reduced by minimizing the reduction in thrust. In this case, if the skew directions of the plurality of permanent magnets that respectively constitute the two permanent magnet rows provided in one magnetic pole part are made the same, the magnetic saturation of the electrical steel sheet that constitutes the magnetic pole part can be prevented.

  Preferably, the magnetic pole portion is formed with a permanent magnet mounting portion configured to be in contact with two or more surfaces of the outer surface of the permanent magnet row. If it does in this way, a permanent magnet row | line | column can be firmly fixed to a magnetic pole part only by making a magnetic pole part into an appropriate shape. Moreover, the magnetic saturation of the electrical steel sheet which comprises a magnetic pole part can be prevented. When only one of the outer surfaces of the permanent magnet row is brought into contact with the magnetic pole portion, a gap is formed between the permanent magnet row and the magnetic pole portion. Therefore, inside the magnetic pole portion adjacent to the portion where the gap is formed. Magnetic flux hardly flows and magnetic saturation is likely to occur.

  A specific linear motor of the present invention includes three inductors that are respectively provided with tooth row rows on both sides in the width direction orthogonal to the moving direction and arranged in parallel at a predetermined interval in the width direction. The armature core is arranged in parallel with a predetermined interval so that the inductor is located between the four magnetic pole portions each having an opposing surface, and three yokes that magnetically connect the two adjacent magnetic pole portions. Department. Then, permanent magnet arrays are arranged on the opposing surfaces of the four magnetic pole portions, respectively, and three armature windings that generate magnetic flux are wound around three yoke portions that magnetically connect the four magnetic pole portions. The armature core is formed by laminating a plurality of electromagnetic steel plates in the moving direction. In this linear motor, a three-phase linear motor can be configured by using three armature windings as U-phase, V-phase, and W-phase armature windings.

  In this case, the positional relationship, ie, the geometric phase difference, of the two tooth row rows as viewed from the electrical angle, the positional relationship, as seen from the electrical angle of the two or more inductors, ie, the geometric phase difference, and the two permanent magnet rows For the positional relationship, that is, the geometrical phase difference as viewed at the electrical angle, various conditions can be adopted. Geometric phase difference in terms of electrical angle means two geometric structures (one tooth row and other tooth row, one inductor and other inductor, one permanent magnet row and The amount of misalignment at the position of the other permanent magnet row) is indicated by an electrical angle. The electrical angle referred to here is expressed by setting the electrical angle of the pitch τ of the plurality of teeth of the inductor to 360 °.

  In a specific linear motor, for example, the geometric phase difference as viewed from the electrical angle of the two tooth rows included in each of the three inductors is set to 0 °. In this state, the two tooth portion rows provided on the inductor are arranged at the same position in the width direction orthogonal to the moving direction of the mover. At this time, one of the two adjacent inductors of the three inductors is shifted so that the geometric phase difference as viewed from the electrical angle of the two adjacent inductors becomes 120 °. In this state, the inductors are not arranged at the same position in the width direction orthogonal to the moving direction of the mover, and the two adjacent inductors are separated by 120 degrees in electrical direction in the moving direction. Then, the geometric phase difference (positional relationship) viewed from the electrical angle of the two permanent magnet rows facing the two tooth row of one inductor is set to 0 °. In this state, the two permanent magnet rows are arranged at the same position in the width direction orthogonal to the moving direction of the mover. In this way, magnetic saturation of the armature core can be made difficult to occur.

  In addition, the geometric phase difference seen from the electrical angle of the two tooth rows included in each of the three inductors is 0 °, and the geometric phase difference seen from the electrical angle of the three inductors is 0 °. And two permanent magnet rows provided corresponding to one inductor and two permanent magnet rows provided corresponding to one other inductor adjacent to the one inductor, It is possible to shift the geometric phase difference as viewed in electrical angle by 120 °. In this way, the geometric phase difference as seen by the electrical angle of the two tooth rows included in each of the three inductors is 0 °, and the geometrical phase difference seen from the electrical angle of the three inductors. Since the phase difference is 0 °, three inductors can be installed. Therefore, installation of three inductors is easy.

  In another specific linear motor, the geometric phase difference viewed from the electrical angle of the two tooth rows included in each of the three inductors is set to 120 °. Also, the geometrical phase difference as seen by the electrical angle of the three inductors is 0 °, and the geometrical phase difference as seen by the electrical angles of the two permanent magnet rows facing the two tooth rows of one inductor. The phase difference is 120 °, and the geometric phase difference as viewed from the electrical angle of the two permanent magnet rows provided in one magnetic pole is 0 °. In this way, since the geometric phase difference in terms of the electrical angle of the three inductors is 0 °, three inductors can be installed. Therefore, the inductor can be easily installed. In addition, magnetic saturation of the armature core can be made difficult to occur.

  Another specific linear motor of the present invention includes two inductors that are respectively provided with tooth rows on both sides in the width direction orthogonal to the moving direction and arranged in parallel at a predetermined interval in the width direction. . The armature core is arranged in parallel with a predetermined interval so that the inductor is located between the three magnetic pole portions each having an opposing surface, and two yoke portions that magnetically connect the three adjacent magnetic pole portions. It has. And a permanent magnet row | line | column is arrange | positioned at the opposing surface of three magnetic pole parts, respectively, and three armature windings which generate a magnetic flux are wound around three magnetic pole parts, respectively. Then, the geometric phase difference seen by the electrical angle of the two tooth rows included in the two inductors is shifted by 120 °, and the geometric phase difference seen by the electrical angle of the two inductors is 0 °. And the geometrical phase difference of the two permanent magnet rows opposed to the two tooth row rows of one inductor is shifted by 120 °. The armature core is formed by laminating a plurality of electromagnetic steel plates in the moving direction.

  In this linear motor, one armature winding wound around the magnetic pole part at one end and the armature winding wound around the magnetic pole part at the center end form one magnetic circuit, and the other A magnetic circuit is formed by the armature winding wound around the magnetic pole portion at the end and the armature winding wound around the magnetic pole portion at the center end to form a two-phase magnetic circuit. It will be. However, the magnetic circuit has two phases, but the armature winding has three phases because the central armature winding is formed by combining two magnetic circuits. Therefore, it is possible to obtain a driving force as a three-phase motor while reducing the size of the linear motor by using two inductors. Moreover, since the geometric phase difference seen by the electrical angle of the two tooth row is shifted by 120 °, magnetic saturation of the central magnetic pole portion can be prevented. Moreover, since the geometric phase difference seen by the electrical angle of the two inductors is 0 °, the two inductors can be installed by aligning the ends of the tooth row. Therefore, the inductor can be easily installed.

  Still another specific linear motor according to the present invention includes two tooth portions arranged on both sides in the width direction orthogonal to the moving direction, arranged in parallel at a predetermined interval in the width direction, and magnetically connected. Has two inductors. The armature core is arranged in parallel with a predetermined interval so that the inductor is located between the three magnetic pole portions each having an opposing surface, and two yoke portions that magnetically connect the three adjacent magnetic pole portions. It has. And a permanent magnet row | line | column is arrange | positioned at the opposing surface of three magnetic pole parts, respectively, and three armature windings which generate a magnetic flux are wound around three magnetic pole parts, respectively. Then, the geometric phase difference seen by the electrical angle of the two tooth rows included in the two inductors is shifted by 180 °, and the geometric phase difference seen by the electrical angle of the two inductors is 0 °. The magnetic phase difference seen by the electrical angle of the two permanent magnet rows facing the two tooth row of one inductor is shifted by 60 °, and one magnetic pole located at the center of the three magnetic pole portions The electrical phase difference between the two permanent magnet rows provided on the two magnetic pole portions located on both sides of the three magnetic pole portions is set to 0 ° as a geometric phase difference in terms of the electrical angle of the two permanent magnet rows provided on the two portions. The geometric phase difference seen from the corner is 30 °. The armature core is formed by laminating a plurality of electromagnetic steel plates in the moving direction.

  In this linear motor, the geometric phase difference as seen by the electrical angle of the two tooth rows included in each of the two inductors is shifted by 180 °, thereby preventing magnetic saturation of the magnetic pole portion located in the center. it can. Moreover, since the geometric phase difference seen by the electrical angle of the two inductors is 0 °, it is possible to install the two inductors in accordance with the tooth row, so that the inductor can be easily installed.

  The two magnetically coupled inductors of the linear motor can be obtained by, for example, coupling the lower portions of the two inductors with a coupling portion. In this case, the magnetic pole part located in the center has a short vertical dimension so as to face the connecting part with a gap. For this reason, the length dimension in the direction perpendicular to the moving direction of the armature and the width direction of the inductor of the two permanent magnet arrays provided in the magnetic pole part located in the center is provided in the two magnetic pole parts located on both sides. It becomes shorter than the length dimension of the above-mentioned direction of the permanent magnet row | line | column made.

  Still another specific linear motor of the present invention includes two inductors that are respectively provided with tooth rows on both sides in the width direction orthogonal to the moving direction and arranged in parallel at a predetermined interval in the width direction. Yes. The armature core is arranged in parallel with a predetermined interval so that the inductor is located between the three magnetic pole portions each having an opposing surface, and two yoke portions that magnetically connect the three adjacent magnetic pole portions. It has. A permanent magnet row is disposed on each of the opposing surfaces of the three magnetic pole portions, and two magnetic pole portions located at both ends of the three magnetic pole portions or two yoke portions that magnetically connect the three magnetic pole portions are provided with magnetic flux. Two armature windings that generate The geometric phase difference seen by the electrical angle of the two tooth rows included in each of the two inductors is shifted by 90 °, and the two permanent magnet rows facing the two tooth rows of one inductor are Shift the geometric phase difference as viewed by electrical angle by 90 °. The armature core is formed by laminating a plurality of electromagnetic steel plates in the moving direction. In such a linear motor, the number of armature windings can be reduced.

  It is preferable to arrange the cooling pipe in a spelled state adjacent to the armature winding. In the linear motor of the present invention, since the number of armature windings can be reduced, the number of bent portions of the cooling pipe can be reduced.

  Employing the structure of the present invention provides an advantage that the number of armature windings can be reduced. Further, since two or more yoke portions are arranged side by side in a direction orthogonal to the moving direction of the mover (inductor width direction), a plurality of armatures wound around three or more magnetic pole portions or two or more yoke portions. The armature windings of the windings can be wound in a direction extending in the moving direction of the mover and arranged side by side in a direction orthogonal to the moving direction of the mover (width direction of the inductor). Therefore, the number of armature windings can be reduced by adjusting the size of one armature winding.

  Further, since the armature core can be configured to have the same cross section in the direction orthogonal to the moving direction of the mover, the armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction of the mover. be able to. Therefore, a fitting member that fixes the armature core to a core support member such as a movable stage can be formed on the armature core.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1 and 2 are an exploded perspective view and a schematic front view of the linear motor according to the first embodiment of the present invention. As shown in both figures, the linear motor of this example includes three inductors 1A to 1C constituting a stator, an armature 3 constituting a mover, a core support member (movable stage) 5, and a base 6. Have. Each of the three inductors 1A to 1C has two tooth row 7 composed of a plurality of tooth portions provided with a predetermined pitch τ in the moving direction (arrow D) of the armature 3, and magnetically A plurality of steel plates made of materials are laminated. The inductors of the three inductors 1A to 1C are arranged so that the tooth row 7 is located on both sides in the width direction orthogonal to the moving direction of the armature 3, and the three inductors 1A to 1C are These are arranged side by side with a predetermined interval in the width direction. In this example, each of the inductors 1 </ b> A to 1 </ b> C is configured by combining a plurality of inductor divided bodies 2 in the moving direction of the armature 3 as shown in FIGS. Specifically, a convex portion 2a formed at an end portion of one adjacent inductor split body 2 and a concave portion 2b formed at an end portion of the other inductor split body 2 are fitted, and a plurality of Inductor divider 2 is coupled. The three inductors 1A to 1C are fixed to the base 6a of the base 6 by screws 8 (broken lines in FIG. 2).

  The armature 3 has an armature core 9, six permanent magnet rows 11A to 11F, and three armature windings 13A to 13C. The armature core 9 has four magnetic pole portions 15A to 15D, three yoke portions 17A to 17C, and two rib portions 19A and 19B, and a plurality of electromagnetic steel plates in the moving direction of the armature 3. Are laminated. All of the four magnetic pole portions 15 </ b> A to 15 </ b> D have a rectangular parallelepiped shape extending in the moving direction of the armature 3. The four magnetic pole portions 15A to 15D are juxtaposed at predetermined intervals so that the three inductors 1A to 1C are located between the inductors 1A to 1C. It has the opposing surface 21 which opposes 1C. Permanent magnet arrays 11 </ b> A to 11 </ b> F are arranged on the facing surface 21. In this example, the permanent magnet rows 11A to 11F are provided with the magnetic pole portion 15A so that the two surfaces of the permanent magnet row 11 are in contact with the permanent magnet mounting portion 15a of the magnetic pole portions 15A to 15D and the two surfaces are exposed to the outside. It is arrange | positioned at the opposing surface 21 in the state embed | buried by ~ 15D. A mode in which the inductors 1A to 1C and the permanent magnet arrays 11A to 11F face each other will be described later.

  The three yoke portions 17A to 17C each extend in the moving direction (arrow D) of the armature 3, and magnetically move adjacent two magnetic pole portions (15A, 15B) (15B, 15C) (15C, 15D) respectively. It is linked to. The armature windings of the three armature windings 13A to 13C that generate magnetic flux are wound around the yoke portions 17A to 17C. Specifically, a U-phase armature winding 13A is wound around the yoke portion 17A, a V-phase armature winding 13B is wound around the yoke portion 17B, and a W-phase armature winding is wound around the yoke portion 17C. 13C is wound. Therefore, as shown in FIG. 2, a magnetic flux is generated by the U-phase armature winding 13A between the magnetic pole portion 15B and the permanent magnet row 11B and the magnetic pole portion 15A and the permanent magnet row 11A, and the magnetic pole portion 15C and the permanent magnet row 11A. A magnetic flux by the V-phase armature winding 13B flows between the magnet row 11D and the magnetic pole portion 15B and the permanent magnet row 11C, and the magnetic pole portion 15D, the permanent magnet row 11F, the magnetic pole portion 15C, and the permanent magnet row 11E In between, the magnetic flux by the W-phase armature winding 13C flows. In addition, in the space between the adjacent armature windings (13A, 3B) (13B, 13C), a zigzag cooling pipe 14 is disposed so as to be adjacent to the armature windings 13A to 13C. In this example, the cooling pipe 14 has a shape bent along the armature windings 13A to 13C, and a coolant for cooling the armature windings 13A to 13C flows inside.

  The two rib portions 19A and 19B are arranged above the magnetic pole portions 15A and 15D located at both ends, and a fitting recess 23 extending in the moving direction of the armature 3 is formed above the two rib portions 19A and 19B. Above the fitting recess 23, a pair of flat plate portions 25a is disposed so as to form an elongated opening 23a at the center. Due to the arrangement of the pair of flat plates 25a, the fitting recess 23 has a substantially rectangular cross section.

  The movable stage 5 constituting the core support member is fixed above the armature core 9 and has a stage body 27 and a pair of fitting convex portions 29. The fitting convex portion 29 is a connecting portion 29b that is disposed in the opening 23a by connecting the elongated rectangular parallelepiped convex portion main body 29a that can be fitted into the fitting concave portion 23, the stage main body 27, and the convex portion main body 29a. And have. With such a configuration, the armature core 9 and the movable stage 5 are relatively moved so that the convex body 29a is inserted into the fitting concave portion 23 and the connecting portion 29b is inserted into the opening 23a. Thus, the armature core 9 can be fixed to the movable stage 5. As shown in FIG. 2, the movable stage 5 is slidably supported on a pair of side walls 6 b of a base 6 disposed on both sides of the armature 3. In this example, the ring body 5a provided on the movable stage 5 is disposed in a groove 6c that opens above the side wall 6b.

  As described above, the permanent magnet arrays 11A to 11F are arranged on the facing surfaces 21 of the magnetic pole portions 15A to 15D. Specifically, the permanent magnet rows 11A and 11B are disposed on the opposing surfaces 21 of the magnetic pole portions 15A and 15B, respectively, and the permanent magnet rows 11C and 11D are provided on the opposing surfaces 21 of the magnetic pole portions 15B and 15C, respectively. Are arranged, and permanent magnet arrays 11E and 11F are arranged on the opposing surfaces 21 of the magnetic pole portions 15C and 15D, respectively. In addition, each permanent magnet row of the permanent magnet rows 11A to 11F has a pitch (τ / 2) that is half the pitch τ of the plurality of tooth portions of the tooth row row 7 in the moving direction of the armature 3 on the facing surface 21. It arrange | positions so that a different polarity may appear alternately along. In this example, as shown in FIG. 4, the geometric phase difference A1 viewed from the electrical angle of the two tooth row 7 provided in each of the three inductors 1A to 1C is 0 °, and the three inductors The geometrical phase difference A2 viewed from the electrical angles of 1A to 1C is shifted by 120 °, and the two permanent magnet rows facing the two tooth row 7 of one inductor of the inductors 1A to 1C. The geometrical phase difference A3 viewed from the electrical angle is 0 °. In FIG. 4, the magnetization directions of the permanent magnet rows 11A to 11F are indicated by arrows in the permanent magnet rows 11A to 11F. In the linear motor of this example, the magnetic flux generated by the armature windings 13A to 13B is changed to a flow converged by a plurality of magnets of the permanent magnet rows 11A to 11F, and a predetermined magnet and inductor (1A to 1A) are changed. A suction force is generated between the plurality of teeth in the tooth row 7 of 1C. Therefore, by changing the flow of magnetic flux by the armature windings 13A to 13B, thrust is generated for the inductors 1A to 1C constituting the stator in the armature 3 constituting the mover.

  According to the linear motor of this example, since the three yoke portions 17A to 17C are arranged side by side in the direction orthogonal to the moving direction of the armature 3 (the width direction of the inductors 1A to 1C), the three yoke portions 17A are arranged. The armature windings of the three armature windings 13A to 13B wound around ˜17C are wound in a direction extending in the moving direction of the armature 3, and are orthogonal to the moving direction of the armature 3. They can be arranged side by side in the direction (the width direction of the inductors 1A to 1C). Therefore, the number of armature windings 13A to 13B can be reduced to three by adjusting the size of one armature winding. Further, since the armature core 9 can have the same cross section in the direction orthogonal to the moving direction of the armature 3, the armature core 9 is formed by laminating a plurality of electromagnetic steel plates in the moving direction of the armature 3. Can be configured. Therefore, a fitting member (fitting recess 23) that fixes the armature core to the movable stage 5 can be formed in the armature core 9. In addition, since the geometric phase difference A2 viewed from the electrical angles of the three inductors 1A to 1C is shifted by 120 °, the magnetic saturation of the armature core 9 can be made difficult to occur.

  The inductor and the permanent magnet array can be configured in various ways. FIG. 5 is a sectional view of the linear motor according to the second embodiment of the present invention. In the linear motor of this example, the geometric phase difference A4 viewed from the electrical angle of the two tooth row arrays 107 provided in each of the three inductors 101A to 101C is 0 °, and the three inductors 101A to 101C Two permanent magnet arrays (111A, 111B) provided corresponding to one inductor (for example, 101A) and the one inductor having a geometric phase difference A5 as viewed in electrical angle of 0 ° The two permanent magnet arrays (111B, 111C) provided corresponding to the other one inductor (101B) adjacent to (101A) have a geometric phase difference A6 of 120 in electrical angle. ° Deviation. In the linear motor of this example, the magnetic saturation of the armature core 109 is likely to occur. However, since the inductors 101A to 101C can be installed together with the tooth row 107, the inductors 101A to 101C can be easily installed.

  FIG. 6 is a cross-sectional view of the linear motor according to the third embodiment of the present invention. In the linear motor of this example, the geometric phase difference A7 viewed from the electrical angle of the two tooth row 207 provided in each of the three inductors 201A to 201C is shifted by 120 °, and the three inductors 201A to 201C. The geometric phase difference A8 viewed at an electrical angle of 0 ° is 0 °, and the two permanent magnet rows (211A, 211B) facing the two tooth row 207 of one inductor (for example, 201A) have an electrical angle. The geometric phase difference A9 seen in Fig. 1 is shifted by 120 °, and the geometrical phase seen from the electrical angle of two permanent magnet arrays (211D, 211E) provided in one magnetic pole part (for example, 215C). The phase difference A10 is 0 °. In the linear motor of this example, since the geometric phase difference A8 viewed from the electrical angle of the three inductors 201A to 201C is 0 °, the inductors 201A to 201C can be installed together with the tooth row 207. Therefore, installation of the inductors 201A to 201C is easy. Further, the magnetic saturation of the armature core 209 can be made difficult to occur.

  FIG. 7 is a perspective view of an armature 303 used in the linear motor according to the fourth embodiment of the present invention. The linear motor of this example has the same structure as the linear motor of the first embodiment shown in FIG. 1 except for the configuration of the armature core 309 and the permanent magnet arrays 311A to 311F attached to the armature core 309. Have. In the linear motor of this example, the plurality of permanent magnets constituting the permanent magnet rows 311A to 311F are provided in a skewed state with respect to the plurality of tooth portions constituting the tooth portion row of the inductor. The skew directions of the plurality of permanent magnets that respectively constitute the two permanent magnet rows provided in one magnetic pole portion are the same. In the linear motor of this example, since the permanent magnet is skewed, the cogging force generated in each phase is close to a sine wave, and the total cogging force of each phase is canceled and becomes smaller.

  FIG. 8 is a front view of a linear motor according to a fifth embodiment of the present invention. In the linear motor of this example, a stator is constituted by two inductors 401A and 401B. The armature 403 includes an armature core 409, four permanent magnet rows 411A to 411D, and three armature windings 413A to 413C. The armature core 409 includes three magnetic pole portions 415A to 415C and two yoke portions 417A and 417B, and a plurality of electromagnetic steel plates are laminated in the moving direction of the armature 403. The three magnetic pole portions 415A to 415C are juxtaposed at a predetermined interval so that the two inductors 401A and 401B are located between the inductors 401A and 401B, respectively. An opposing surface 421 is provided. Four permanent magnet rows 411A to 411D are arranged on the facing surface 421, respectively. Specifically, permanent magnet rows 411A and 411B are arranged on the opposing surfaces 421 of the magnetic pole portions 415A and 415B, respectively, and permanent magnet rows 411C and 411D are provided on the opposing surfaces 421 of the magnetic pole portions 415B and 415C, respectively. Are arranged respectively. Further, in the linear motor of this example, three armature windings 413A to 413C that generate magnetic flux are wound above the three magnetic pole portions 415A to 415C, respectively. Specifically, a U-phase armature winding 413A is wound around the magnetic pole portion 415A, a W-phase armature winding 413B is wound around the magnetic pole portion 415B, and a V-phase armature winding is wound around the magnetic pole portion 415C. 413C is wound. As described above, the armature 403 uses three-phase windings as the armature windings 413A to 413C. As shown in FIG. 9, the W-phase armature winding 413B is a U-phase electric machine. It has a phase opposite to that obtained by adding the child winding 413A and the V-phase armature winding 413B. Therefore, as shown in the schematic diagram of FIG. 10, a U-phase armature winding 413A and a W-phase armature winding are provided between the magnetic pole portion 415A and the permanent magnet row 411A and the magnetic pole portion 415B and the permanent magnet row 411B. The magnetic flux by the line 413B flows, and the magnetic flux by the W-phase armature winding 413B and the V-phase armature winding 413C is between the magnetic pole portion 415B and the permanent magnet row 411C and the magnetic pole portion 415C and the permanent magnet row 411D. As a whole, the magnetic flux of the two-phase magnetic circuit flows. In this example, as shown in FIG. 11, the geometric phase difference A11 viewed from the electrical angle of the two tooth row 407 provided in each of the two inductors 401A and 401B is shifted by 120 °. The geometric phase difference A12 viewed from the electrical angle of the two inductors 401A, 401B is 0 °, and two permanent magnet rows (for example, 401A) facing two tooth rows 407 ( 411A and 411B) have a geometric phase difference A13 as viewed in electrical angle that is shifted by 120 °.

  In the linear motor of this example, the magnetic circuit has two phases, but the armature winding has three phases. Therefore, it is possible to obtain a driving force as a three-phase motor after reducing the size of the linear motor. In addition, since the geometric phase difference A11 viewed from the electrical angle of the two tooth row 407 is shifted by 120 °, magnetic saturation of the central magnetic pole portion 415B can be prevented, and the two inductors 401A Since the geometric phase difference A12 viewed from the electrical angle of 401B is 0 °, the inductors 401A and 401B can be installed together with the tooth row 407, so that the inductors 401A and 401B can be easily installed. .

  FIG. 12 shows an example in which the cooling pipe 414 is arranged in the linear motor according to the fifth embodiment of the present invention shown in FIG. In this example, the armature windings 413A to 413C are configured so that gaps are formed between the yoke portions 417A and 417B and the armature windings 413A to 413C. Then, a zigzag cooling pipe 414 is disposed in the gap so as to be adjacent to the armature windings 413A to 413C. In this example, as shown in FIG. 13, the cooling pipe 414 has a shape bent along the armature windings 413A to 413C, and in order to cool the armature windings 413A to 413C inside. The refrigerant is flowing.

  FIG. 14 is a front view of a linear motor according to a sixth embodiment of the present invention. The linear motor of this example has the same structure as the linear motor of the fifth embodiment shown in FIG. 8 except for the structure of the inductor, the magnetic pole portion located in the center, and the permanent magnet array. In the linear motor of this example, two inductors 501A and 501B are magnetically coupled. Specifically, as shown in FIGS. 14 and 15, the lower portions of the inductors 501 </ b> A and 501 </ b> B are connected by a connecting portion 502. The connecting portion 502 is fixed to the base 506 a of the base 506 by a screw 508. In addition, the magnetic pole portion 515B located at the center has a short vertical dimension so as to face the coupling portion 502 with a gap. For this reason, the length dimension in the direction perpendicular to the moving direction of the armature 503 of the two permanent magnet rows 511B and 511C provided in the magnetic pole part 515B located in the center and the width direction of the inductors 501A and 501B is on both sides. The lengths of the permanent magnet rows 511A and 511D provided in the two magnetic pole portions 515A and 515C located are shorter than the length dimension in the above-described direction.

  Further, in this example, as shown in FIG. 16, the geometric phase difference A14 viewed from the electrical angle of the two tooth rows included in each of the two inductors 501A and 501B is shifted by 180 °. Two permanent magnet rows 511A and 511B facing the two tooth rows of one inductor (for example, 501A) having a geometric phase difference A15 as viewed in electrical angle of the inductors 501A and 501B is 0 °. The geometrical phase difference A16 viewed from the electrical angle is shifted by 60 °, and the geometrical phase difference viewed from the electrical angle of the two permanent magnet rows 511B and 511C provided in the magnetic pole portion 515B located at the center. A17 is 0 °, and the geometric phase difference A18 as viewed from the electrical angle of the two permanent magnet arrays 511A and 511D provided on the two magnetic pole portions 515A and 515C located on both sides of the three magnetic pole portions is 30. °.

  In the linear motor of this example, the geometric phase difference A14 viewed from the electrical angle of the two tooth row 507 is shifted by 180 °, so that magnetic saturation of the magnetic pole portion 515B located at the center can be prevented. Further, since the geometric phase difference A15 viewed from the electrical angle of the two inductors 501A and 501B is 0 °, the inductors 501A and 501B can be installed together with the tooth row 507. Installation of 501B is easy.

  FIG. 17 is a front view of a linear motor according to a seventh embodiment of the present invention. In the linear motor of this example, a stator is constituted by two inductors 601A and 601B. The armature 603 includes an armature core 609, four permanent magnet rows 611A to 611D, and two armature windings 613A and 613B. The armature core 609 includes three magnetic pole portions 615A to 615C and two yoke portions 617A and 617B, and a plurality of electromagnetic steel plates are laminated in the moving direction of the armature 603. The three magnetic pole portions 615A to 615C are arranged side by side with a predetermined interval so that the two inductors 601A and 601B are positioned between them, and face the inductors 601A and 601B of the respective magnetic pole portions. Four permanent magnet rows 611A to 611D are arranged on the facing surface, respectively. Specifically, permanent magnet arrays 611A and 611B are arranged on the opposing surfaces of the magnetic pole portions 615A and 615B, respectively, and permanent magnet arrays 611C and 611D are provided on the opposing surfaces of the magnetic pole portions 615B and 615C, respectively. Has been placed. In the linear motor of this example, two armature windings 613A and 613B that generate magnetic flux are respectively wound above the two magnetic pole portions 615A and 615C located at both ends of the three magnetic pole portions 615A to 615C. Has been. Specifically, an A-phase armature winding 613A is wound around the magnetic pole portion 615A, and a B-phase armature winding 613B is wound around the magnetic pole portion 615C. As shown in FIG. 18, the phases of the A phase and the B phase are shifted by 90 °. As shown by the arrows in FIG. 17, a magnetic flux by the A-phase armature winding 613A flows between the magnetic pole portion 615A and the permanent magnet row 611A and the magnetic pole portion 615B and the permanent magnet row 611B, and the magnetic pole portion 615B and the permanent magnet row 615B Magnetic flux generated by the B-phase armature winding 613B flows between the magnet row 611C, the magnetic pole portion 615C, and the permanent magnet row 611D. Further, in this example, as shown in FIG. 19, the geometric phase difference A19 viewed from the electrical angle of the two tooth row 607 provided in each of the two inductors 601A and 601B is shifted by 90 °. Two permanent magnet rows (611A, 611B) facing two tooth row rows 607 of two inductors (for example, 601A) have a geometric phase difference A20 as viewed in electrical angle shifted by 90 °.

  FIG. 20 is a front view of the linear motor according to the eighth embodiment of the present invention. In the linear motor of this example, two armature windings 613A and 613B are wound around two yoke portions 617A and 617B that magnetically connect the three magnetic pole portions 615A to 615C, respectively. It has the same structure as the linear motor of the embodiment.

  In the linear motors according to the seventh and eighth embodiments of the present invention, the number of armature windings can be reduced.

  Hereinafter, the invention disclosed in this specification will be additionally described.

(1) one or more inductors having at least one tooth row composed of a plurality of tooth portions made of a magnetic material and provided with a predetermined pitch τ1 in the moving direction of the mover;
An armature core having one or more facing surfaces facing the tooth row, and a polarity that is provided on the facing surface with a predetermined pitch τ2 in the moving direction and alternately different along the facing surface. One or more permanent magnet rows composed of a plurality of permanent magnets arranged to appear, and a plurality of electric machines wound around the armature core to generate magnetic flux between the plurality of permanent magnets and the tooth portion row An armature with a child winding,
A linear motor in which one of the inductor and the armature is a mover and the other is a stator,
Two or more inductors provided side by side with a predetermined interval in the width direction with the tooth row on both sides in the width direction orthogonal to the moving direction,
The armature cores are arranged in parallel at a predetermined interval so that the inductor is positioned between them, and magnetically connect three or more magnetic pole portions each having the facing surface and two adjacent magnetic pole portions. With two or more yoke parts,
The permanent magnet rows are respectively disposed on the facing surfaces of the three or more magnetic pole portions;
A linear motor in which the armature windings of the plurality of armature windings are wound around the three or more magnetic pole portions or the two or more yoke portions.

  (2) The linear motor according to (1), wherein the armature core is configured by stacking a plurality of electromagnetic steel plates in the moving direction.

(3) The armature core is fixed to a core support member that moves relative to the two or more inductors,
The armature core is formed with one of a fitting concave portion and a fitting convex portion, and the core support member is formed with the other of the fitting concave portion and the fitting convex portion,
The linear motor according to (2), wherein one of the fitting concave portion and the fitting convex portion is engaged with the other, and the armature core is fixed to the core support member.

  (4) The linear motor according to (1), wherein the pitch τ1 and the pitch τ2 are in a relationship of τ2 = τ1 / 2.

  (5) The plurality of permanent magnets constituting the permanent magnet row facing the tooth row is provided in a skewed state with respect to the plurality of tooth portions constituting the tooth row. The linear motor according to (1) or (4) above.

  (6) The linear motor according to (5) above, wherein the skew directions of the plurality of permanent magnets that respectively constitute the two permanent magnet arrays provided in one magnetic pole portion are the same.

  (7) The linear motor according to (1), wherein the magnetic pole portion is formed with a permanent magnet mounting portion configured to contact two or more surfaces of the outer surface of the permanent magnet row.

(8) one or more inductors having one or more tooth rows made of a magnetic material and having a plurality of tooth portions provided with a predetermined pitch τ in the moving direction of the mover;
An armature core having one or more facing surfaces facing the tooth row, and provided on the facing surface with a predetermined pitch τ / 2 in the moving direction and different alternately along the facing surface One or more permanent magnet arrays composed of a plurality of permanent magnets arranged so that the polarity appears, and a plurality of coils wound around the armature core to generate magnetic flux between the plurality of permanent magnets and the tooth section array An armature with an armature winding of
A linear motor in which one of the inductor and the armature is a mover and the other is a stator,
Including the three inductors arranged in parallel at a predetermined interval in the width direction with the tooth row on both sides in the width direction orthogonal to the moving direction;
The armature cores are arranged side by side with a predetermined interval so that the inductor is positioned between them, and magnetically connect the four magnetic pole portions each having the facing surface and the two adjacent magnetic pole portions. With two yoke parts,
The permanent magnet rows are respectively disposed on the facing surfaces of the four magnetic pole portions,
The three armature windings are respectively wound around the three yoke portions,
The armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction.

(9) The positional relationship seen by the electrical angle of the two tooth part rows provided in each of the three inductors is 0 °,
The positional relationship seen by the electrical angle of the three inductors is shifted by 120 °,
The linear motor according to (8), wherein the positional relationship of the two permanent magnet rows opposed to the two tooth portion rows of the one inductor as viewed in electrical angle is 0 °.

(10) The positional relationship seen by the electrical angle of the two tooth part rows provided in each of the three inductors is 0 °,
The positional relationship of the three inductors as viewed from the electrical angle is 0 °,
Two permanent magnet rows provided corresponding to one inductor and two permanent magnet rows provided corresponding to the other one inductor adjacent to the one inductor; Is the linear motor according to (8), wherein the positional relationship as viewed in electrical angle is shifted by 120 °.

(11) The positional relationship seen by the electrical angle of the two tooth part rows included in each of the three inductors is shifted by 120 °,
The positional relationship of the three inductors as viewed from the electrical angle is 0 °,
The two permanent magnet rows facing the two tooth row of one inductor are displaced by 120 ° in positional relationship as viewed in electrical angle,
The linear motor according to (8), wherein a positional relationship in terms of an electrical angle between two permanent magnet arrays provided in one magnetic pole portion is 0 °.

(12) one or more inductors having one or more tooth rows composed of a plurality of tooth portions made of a magnetic material and provided with a predetermined pitch τ in the moving direction of the mover;
An armature core having at least one facing surface facing the tooth row, and disposed on the facing surface with a predetermined pitch τ / 2 in the moving direction so that different polarities appear alternately. One or more permanent magnet rows composed of a plurality of permanent magnets, and a plurality of armature windings wound around the armature core to generate a magnetic flux between the plurality of permanent magnets and the tooth row. With an armature with
A linear motor in which one of the inductor and the armature is a mover and the other is a stator,
Two inductors provided side by side with a predetermined interval in the width direction with the tooth row on both sides in the width direction orthogonal to the movement direction,
The armature cores are arranged side by side with a predetermined interval so that the inductor is located between them, and magnetically connect the three magnetic pole portions each having the facing surface and the adjacent three magnetic pole portions. With two yoke parts,
The permanent magnet rows are arranged on the facing surfaces of the three magnetic pole portions, respectively.
The three armature windings are respectively wound around the three magnetic pole portions,
The positional relationship seen by the electrical angle of the two tooth part rows provided in each of the two inductors is shifted by 120 °,
The positional relationship of the two inductors as viewed from the electrical angle is 0 °;
The two permanent magnet rows facing the two tooth row of one inductor are displaced by 120 ° in positional relationship as viewed in electrical angle,
The armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction.

(13) one or more inductors having one or more tooth rows made of a magnetic material and having a plurality of tooth portions provided with a predetermined pitch τ in the moving direction of the mover;
An armature core having at least one facing surface facing the tooth row, and disposed on the facing surface with a predetermined pitch τ / 2 in the moving direction so that different polarities appear alternately. One or more permanent magnet rows comprising a plurality of permanent magnets, and a plurality of armature windings wound around the armature core to generate a magnetic flux between the plurality of permanent magnets and the tooth row. With an armature with
A linear motor in which one of the inductor and the armature is a mover and the other is a stator,
Two inductors each provided with the tooth portion row on both sides in the width direction orthogonal to the moving direction and arranged in parallel with a predetermined interval in the width direction and magnetically coupled,
The armature cores are arranged side by side with a predetermined interval so that the inductor is located between them, and magnetically connect the three magnetic pole portions each having the facing surface and the adjacent three magnetic pole portions. With two yoke parts,
The permanent magnet rows are arranged on the facing surfaces of the three magnetic pole portions, respectively.
The three armature windings are respectively wound around the three magnetic pole portions,
The positional relationship seen by the electrical angle of the two tooth part rows respectively provided in the two inductors is shifted by 180 °,
The positional relationship of the two inductors as viewed from the electrical angle is 0 °;
The two permanent magnet rows opposed to the two tooth portion rows of the one inductor are displaced by 60 ° in positional relationship as viewed in electrical angle,
The positional relationship of the two permanent magnet rows provided in one magnetic pole part located in the center among the three magnetic pole parts is 0 °, and the positional relationship is 0 °.
The positional relationship of the two permanent magnet rows provided on the two magnetic pole portions located on both sides of the three magnetic pole portions is 30 ° as viewed in electrical angle,
The armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction.

  (14) Lengths in the direction perpendicular to the moving direction and the width direction of the two permanent magnet rows provided in the magnetic pole portion located in the center are provided in the two magnetic pole portions located on both sides. The linear motor according to the above (13), which is shorter than the length dimension of the permanent magnet array in the direction.

(15) one or more inductors having one or more tooth rows composed of a plurality of tooth portions made of a magnetic material and provided with a predetermined pitch τ in the moving direction of the mover;
An armature core having one or more facing surfaces facing the tooth row, and provided on the facing surface with a predetermined pitch τ / 2 in the moving direction and different alternately along the facing surface One or more permanent magnet arrays composed of a plurality of permanent magnets arranged so that the polarity appears, and a plurality of coils wound around the armature core to generate magnetic flux between the plurality of permanent magnets and the tooth section array An armature with an armature winding of
A linear motor in which one of the inductor and the armature is a mover and the other is a stator,
Two inductors provided side by side with a predetermined interval in the width direction with the tooth row on both sides in the width direction orthogonal to the movement direction,
The armature cores are arranged side by side with a predetermined interval so that the inductor is located between them, and magnetically connect the three magnetic pole portions each having the facing surface and the adjacent three magnetic pole portions. With two yoke parts,
The permanent magnet rows are arranged on the facing surfaces of the three magnetic pole portions, respectively.
The two armature windings are respectively wound around the two magnetic pole portions or the two yoke portions located at both ends of the three magnetic pole portions,
The two tooth sections included in each of the two inductors are displaced by 90 ° in positional relationship as viewed in electrical angle,
The two permanent magnet rows opposed to the two tooth portion rows of the one inductor have a positional relationship of 90 ° as viewed in electrical angle,
The armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction.

  (16) The linear motor according to any one of (1) to (15), wherein the cooling pipe is arranged in a zigzag state adjacent to the armature winding.

It is a disassembled perspective view of the linear motor of the 1st Embodiment of this invention. It is a schematic front view of the linear motor of the 1st Embodiment of this invention. (A) is a top view which shows the state with which the several inductor division body which comprises the inductor used for the linear motor of the 1st Embodiment of this invention is couple | bonded, (B) is several It is a top view which shows the state which the inductor division body has isolate | separated. It is sectional drawing of the linear motor of the 1st Embodiment of this invention. It is sectional drawing of the linear motor of the 2nd Embodiment of this invention. It is sectional drawing of the linear motor of the 3rd Embodiment of this invention. It is a perspective view of the armature used for the linear motor of the 4th Embodiment of this invention. It is a front view of the linear motor of the 5th Embodiment of this invention. It is a figure which shows the phase of the armature winding of the linear motor of the 5th Embodiment of this invention. It is the schematic for demonstrating the flow of the magnetic flux of the linear motor of the 5th Embodiment of this invention. It is sectional drawing of the linear motor of the 5th Embodiment of this invention. In the linear motor of 5th Embodiment, it is a front view of the linear motor of the example which has arrange | positioned the cooling pipe. It is a perspective view of the cooling pipe used for the linear motor of 5th Embodiment. It is a front view of the linear motor of the 6th Embodiment of this invention. It is a partial front view of the inductor of the linear motor of the 6th Embodiment of this invention. It is sectional drawing of the linear motor of the 6th Embodiment of this invention. It is a front view of the linear motor of the 7th Embodiment of this invention. It is a figure which shows the phase of the armature winding of the linear motor of the 7th Embodiment of this invention. It is sectional drawing of the linear motor of the 7th Embodiment of this invention. It is a front view of the linear motor of the 8th Embodiment of this invention.

Explanation of symbols

1A ~ 1C Inductor (stator)
3 Armature 5 Core support member (movable stage)
7 Tooth part row 9 Armature core 11A to 11F Permanent magnet row 13A to 13C Armature winding 15A to 15D Magnetic pole part 17A to 17C Yoke part 21 Opposing surface 23 Fitting concave part 29 Fitting convex part

Claims (16)

A linear motor having a mover and a stator,
Comprising two or more inductors and armatures made of magnetic material;
Each of the two or more inductors is provided with a tooth portion row composed of a plurality of tooth portions provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction orthogonal to the moving direction. And
The two or more inductors are juxtaposed at intervals in the width direction,
The armature includes an armature core, two or more armature windings, a plurality of armature windings provided with a predetermined pitch τ2 in the moving direction, and arranged so that different polarities appear alternately in the moving direction. And four or more permanent permanent magnet arrays made of permanent magnets,
The armature core includes three or more magnetic pole portions and two or more yoke portions that magnetically connect the two adjacent magnetic pole portions,
The three or more magnetic pole portions are arranged in parallel at a predetermined interval so that one of the inductors is located between them,
Each of the three or more magnetic pole portions has one or two facing surfaces facing the tooth row of the inductor,
One of the four or more permanent permanent magnet rows is disposed on the facing surface,
The three or more armature windings generate the magnetic flux between the plurality of permanent magnets constituting the permanent magnet row and the tooth portion row facing the permanent magnet row. Wound around the magnetic pole part or the two or more yoke parts,
A linear motor in which one of the two or more inductors and armatures is the mover, and the other of the two or more inductors and armatures is the stator.   The linear motor according to claim 1, wherein the armature core is configured by laminating a plurality of electromagnetic steel plates in the moving direction. The armature core is fixed to a core support member that moves relative to the two or more inductors;
The armature core is formed with one of a fitting concave portion and a fitting convex portion, and the core support member is formed with the other of the fitting concave portion and the fitting convex portion,
The linear motor according to claim 2, wherein one of the fitting concave portion and the fitting convex portion is fitted into the other and the armature core is fixed to the core support member.   2. The linear motor according to claim 1, wherein the pitch τ1 and the pitch τ2 are in a relationship of τ2 = τ1 / 2.   The plurality of permanent magnets constituting the permanent magnet row facing the tooth portion row are provided in a skewed state with respect to the plurality of tooth portions constituting the tooth portion row. Item 5. The linear motor according to item 1 or 4.   The linear motor according to claim 5, wherein the skew directions of the plurality of permanent magnets that respectively constitute the two permanent magnet arrays provided in one magnetic pole portion are the same.   2. The linear motor according to claim 1, wherein the magnetic pole portion is formed with a permanent magnet mounting portion configured to be in contact with two or more surfaces of the outer surface of the permanent magnet row. A linear motor having a mover and a stator,
Comprising three inductors and armature made of magnetic material;
Each of the three inductors is provided with a tooth portion row composed of a plurality of tooth portions provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction perpendicular to the moving direction. And
The three inductors are juxtaposed at intervals in the width direction,
The armature is provided with an armature core, three armature windings, and a plurality of permanent magnets provided with a predetermined pitch τ2 in the moving direction and arranged so that different polarities appear alternately in the moving direction. It has six permanent permanent magnet rows consisting of magnets,
The armature core includes four magnetic pole portions and three yoke portions that magnetically connect the two adjacent magnetic pole portions,
The four magnetic pole portions are arranged in parallel at a predetermined interval so that one inductor is located between them,
The armature core is configured by laminating a plurality of electromagnetic steel sheets in the moving direction,
Each of the four magnetic pole portions has one or two facing surfaces that face the tooth row of the inductor,
One of the six permanent magnet rows is disposed on the facing surface,
The three armature windings are arranged in the three yoke portions so that magnetic flux is generated between the plurality of permanent magnets constituting the permanent magnet row and the tooth row facing the permanent magnet row. Each wrapped,
A linear motor in which one of the three inductors and the armature serves as the mover and the other of the three inductors and armature serves as the stator. The geometrical phase difference as seen by the electrical angle of the two tooth rows included in each of the three inductors is 0 °,
A geometric phase difference in terms of an electrical angle between two inductors adjacent to the three inductors is 120 °;
9. The linear motor according to claim 8, wherein a geometric phase difference in terms of an electrical angle between two permanent magnet rows opposed to the two tooth portion rows of one inductor is 0 °. The geometrical phase difference as seen by the electrical angle of the two tooth rows included in each of the three inductors is 0 °,
A geometric phase difference in terms of an electrical angle between two adjacent inductors of the three inductors is 0 °;
Two permanent magnet rows provided corresponding to one inductor and two permanent magnet rows provided corresponding to the other one inductor adjacent to the one inductor; The linear motor according to claim 8, wherein a geometric phase difference in terms of an electrical angle is shifted by 120 °. The geometrical phase difference as viewed from the electric angle of the two tooth rows included in each of the three inductors is 120 °,
The geometric phase difference as seen by the electrical angle of the three inductors is 0 °,
The geometric phase difference in terms of the electrical angle of the two permanent magnet rows facing the two tooth row rows of the one inductor is 120 °;
The linear motor according to claim 8, wherein a positional relationship of the two permanent magnet rows provided in one magnetic pole portion as viewed in electrical angle is 0 °. A linear motor having a mover and a stator,
Comprising two inductors and an armature made of magnetic material;
Each of the two inductors is provided with a tooth part row composed of a plurality of tooth parts provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction perpendicular to the moving direction. And
The two inductors are juxtaposed at intervals in the width direction,
The armature is provided with an armature core, three armature windings, and a plurality of permanent magnets provided with a predetermined pitch τ2 in the moving direction and arranged so that different polarities appear alternately in the moving direction. has four permanent permanent magnet row formed of the magnet,
The armature core includes three magnetic pole portions and two yoke portions that magnetically connect the two adjacent magnetic pole portions,
The three magnetic pole portions are arranged in parallel at a predetermined interval so that one inductor is located between them,
The armature core is configured by laminating a plurality of electromagnetic steel sheets in the moving direction,
Each of the three magnetic pole portions has one or two facing surfaces facing the tooth row of the inductor,
One of the four permanent magnet rows is disposed on the facing surface,
In the three magnetic pole portions, the three armature windings generate magnetic fluxes between the plurality of permanent magnets constituting the permanent magnet row and the tooth row opposite to the permanent magnet row. Each wrapped,
The geometrical phase difference as viewed from the electrical angle of the two tooth rows included in each of the two inductors is 120 °,
The geometric phase difference as seen by the electrical angle of the two inductors is 0 °,
The geometric phase difference in terms of the electrical angle of the two permanent magnet rows facing the two tooth row rows of the one inductor is 120 °;
The positional relationship of the two permanent magnet rows provided in one magnetic pole portion as viewed in electrical angle is 0 °,
A linear motor in which one of the two inductors and the armature serves as the movable element, and the other of the two inductors and the armature serves as the stator. A linear motor having a mover and a stator,
Comprising two inductors and an armature made of magnetic material;
Each of the two inductors is provided with a tooth part row composed of a plurality of tooth parts provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction perpendicular to the moving direction. And
The two inductors are juxtaposed at intervals in the width direction,
The armature is provided with an armature core, three armature windings, and a plurality of permanent magnets provided with a predetermined pitch τ2 in the moving direction and arranged so that different polarities appear alternately in the moving direction. has four permanent permanent magnet row formed of the magnet,
The armature core includes three magnetic pole portions and two yoke portions that magnetically connect the two adjacent magnetic pole portions,
The three magnetic pole portions are arranged in parallel at a predetermined interval so that one inductor is located between them,
The armature core is configured by laminating a plurality of electromagnetic steel sheets in the moving direction,
Each of the three magnetic pole portions has one or two facing surfaces facing the tooth row of the inductor,
One of the four permanent magnet rows is disposed on the facing surface,
In the three magnetic pole portions, the three armature windings generate magnetic fluxes between the plurality of permanent magnets constituting the permanent magnet row and the tooth row opposite to the permanent magnet row. Each is wound,
The geometric phase difference as viewed from the electrical angle of the two tooth rows included in each of the two inductors is 180 °,
The geometric phase difference as seen by the electrical angle of the two inductors is 0 °,
The geometric phase difference in terms of the electrical angle of the two permanent magnet rows opposed to the two tooth row rows of one inductor is 60 °,
The geometric phase difference in terms of the electrical angle of two permanent magnet arrays provided in one magnetic pole portion located in the center of the three magnetic pole portions is 0 °,
The geometric phase difference in terms of the electrical angle of two permanent magnet rows provided on two magnetic pole portions located on both sides of the three magnetic pole portions is 30 °,
A linear motor in which one of the two inductors and the armature serves as the movable element, and the other of the two inductors and the armature serves as the stator.   Permanent magnets provided in the two magnetic pole portions located on both sides of the two permanent magnet rows provided in the magnetic pole portion located in the center in the direction perpendicular to the moving direction and the width direction. The linear motor according to claim 13, wherein the linear motor is shorter than a length dimension of the row in the direction. A linear motor having a mover and a stator,
Comprising two inductors and an armature made of magnetic material;
Each of the two inductors is provided with a tooth part row composed of a plurality of tooth parts provided with a predetermined pitch τ1 in the moving direction of the mover on both sides in the width direction perpendicular to the moving direction. And
The two inductors are juxtaposed at intervals in the width direction,
The armature is provided with an armature core, three armature windings, and a plurality of permanent magnets provided with a predetermined pitch τ2 in the moving direction and arranged so that different polarities appear alternately in the moving direction. has four permanent permanent magnet row formed of the magnet,
The armature core includes three magnetic pole portions and two yoke portions that magnetically connect the two adjacent magnetic pole portions,
The three magnetic pole portions are arranged in parallel at a predetermined interval so that one inductor is located between them,
The armature core is configured by laminating a plurality of electromagnetic steel sheets in the moving direction,
Each of the three magnetic pole portions has one or two facing surfaces facing the tooth row of the inductor,
One of the four permanent magnet rows is disposed on the facing surface,
The three magnetic pole portions or the three magnetic pole portions so that the three armature windings generate a magnetic flux between the plurality of permanent magnets constituting the permanent magnet row and the tooth portion row facing the permanent magnet row. Wound around the two yoke parts,
The geometric phase difference as viewed from the electrical angle of the two tooth rows included in each of the two inductors is 90 °,
The geometric phase difference as seen by the electrical angle of the two inductors is 0 °,
The geometric phase difference in terms of the electrical angle of the two permanent magnet rows opposed to the two tooth row rows of one inductor is 90 °,
A linear motor in which one of the two inductors and the armature serves as the movable element, and the other of the two inductors and the armature serves as the stator.   The linear motor according to claim 1, wherein a cooling pipe is arranged in a zigzag state adjacent to the armature winding.

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