Method of manufacturing armature for linear motor, and armature for linear motor

Abstract

To provide a method of manufacturing an armature for a linear motor capable of preventing warping of a heat transfer member, and an armature for a linear motor.SOLUTION: A method of manufacturing an armature for a linear motor having: a core member having a plate-like core, magnetic pole teeth, and coils; a cooling mechanism for cooling the core member; and a heat transfer member disposed between the core member and the cooling mechanism to transfer heat of the coils of the core member to the cooling mechanism includes: a core member preparation step for preparing the core member having the plurality of magnetic pole teeth on one main surface of the plate-like core, and formed by winding each of the coils around the respective magnetic pole teeth; a resin molding step for resin molding the magnetic pole teeth and the coils of the core member to manufacture a resin mold core member; a heat transfer member attachment step for opposing the one main surface of the heat transfer member to the other main surface of the plate-like core, which is not resin molded, of the resin mold core member to attach the heat transfer member; and a cooling mechanism attachment step for attaching the cooling mechanism on the other main surface of the heat transfer member.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a method for manufacturing an armature and an armature for a linear motor. [Background technology]

[0002] A motor has a stator and a mover, and is configured to move the mover relative to the stator by magnetically generating a thrust between the stator and the mover. A typical example of a motor is a linear motor, which has a configuration in which a mover (field magnet part) in which multiple permanent magnets are arranged so that their magnetism alternates, and a stator (armature) in which coils are wound around multiple magnetic pole teeth via bobbins, and these are arranged in correspondence with each other at a predetermined distance, and when an AC current is passed through the stator coils, thrust is generated by the attraction / repulsion force between the permanent magnets and the stator, causing the mover to move linearly relative to the stator.

[0003] For example, Patent Document 1 discloses that since a holding member that holds the lead wires of the coil is fixed to the bobbin, the lead wires can be held so as not to protrude from the resin part when forming the resin part that molds the stator or mover with resin, thereby improving the reliability of the linear motor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-226185 Summary of the Invention [Problem to be solved by the invention]

[0005] In iron-core linear motors, which have magnetic pole teeth on an armature and coils wound around the pole teeth, a cooling mechanism with a cooling structure that passes a refrigerant is provided to suppress deterioration of the linear motor's characteristics caused by heat generated by the coil and eddy currents during operation. However, if the cooling mechanism is connected directly to the coil (armature), there is a problem that the area through which the refrigerant passes may be locally cooled, causing distortion. Therefore, a configuration is adopted in which the heat generated in the armature is transferred to the cooling mechanism via a heat transfer member. A material with high thermal conductivity, such as aluminum or copper, is used as the heat transfer member.

[0006] On the other hand, in rotary motors, the armature is generally molded with resin material to increase the motor's output, drive it with high efficiency, or improve its waterproof and dustproof properties.The same is true for linear motors, where the armature, with coils wound around the magnetic pole teeth, is generally molded with resin (hereinafter referred to as resin molding).

[0007] When resin-molding the armature of a linear motor, for example, an aluminum plate can be used as a heat-transfer member. The armature is fixed onto the aluminum plate, and the armature is then covered with a mold and resin is poured into it to resin-mold the armature on the aluminum plate. This results in direct contact between the armature and the aluminum plate, making it easy for heat from the armature to be transferred to the aluminum plate. Furthermore, by connecting a cooling mechanism to the surface of the aluminum plate opposite the surface (one main surface) that contacts the armature, the heat transferred to the aluminum plate can be efficiently cooled. This simple configuration allows heat generated in the armature to be dissipated.

[0008] However, when resin molding is performed, high-temperature resin (for example, around 150°C) is poured in, which creates a problem of a difference in thermal expansion between the resin and the aluminum plate after resin molding, causing warping of the aluminum plate. Because warping due to thermal expansion is proportional to volume, the impact of warping of the aluminum plate is small when the overall volume of the linear motor is small, but the impact of warping of the aluminum plate becomes greater as the overall volume of the linear motor increases. Warping of the aluminum plate reduces the accuracy of assembly with other components such as the cooling mechanism, which ultimately leads to a decrease in the accuracy of the linear motor.

[0009] The present disclosure has been made in view of the above circumstances, and has an object to provide a method for manufacturing an armature for a linear motor that can prevent warping of the heat transfer member, and an armature for a linear motor. [Means for solving the problem]

[0010] The method for manufacturing an armature for a linear motor according to the present disclosure is a method for manufacturing an armature for a linear motor having a core member having a plate-shaped core, magnetic pole teeth, and a coil, a cooling mechanism for cooling the core member, and a heat transfer member arranged between the core member and the cooling mechanism and for transferring heat from the coil of the core member to the cooling mechanism, and includes a core member preparation process for preparing the core member having a plurality of magnetic pole teeth on one main surface of the plate-shaped core and having the coil wound around each of the plurality of magnetic pole teeth, a resin molding process for resin-molding the magnetic pole teeth and the coil of the core member to produce a resin-molded core member, a heat transfer member attachment process for attaching one main surface of the heat transfer member to face the other main surface of the plate-shaped core of the resin-molded core member, which is not resin-molded, and a cooling mechanism attachment process for attaching the cooling mechanism to the other main surface of the heat transfer member.

[0011] In the present disclosure, the heat transfer member attachment step is performed after the resin molding step. That is, the heat transfer member is attached to the resin mold core member after the resin molding step, and the resin molding step is not performed with the heat transfer member attached to the core member. Therefore, warping of the heat transfer member can be prevented.

[0012] In the manufacturing method of an armature for a linear motor according to the present disclosure, the heat transfer member attachment process includes a process of preparing a plurality of the resin molded core members and a process of connecting the respective resin molded core members in the direction in which the magnetic pole teeth are arranged.

[0013] In the present disclosure, it is possible to easily connect multiple resin molded core members in the direction in which the magnetic pole teeth are arranged side by side, and therefore, when the armature is used as a stator, the moving distance of the mover (field magnet part) can be freely increased.

[0014] The method for manufacturing a linear motor armature according to the present disclosure further includes, after the heat transfer member attaching step, a magnetic sensor attaching step of attaching a magnetic sensor to at least one end face of the resin molded core member in the juxtaposition direction of the magnetic pole teeth.

[0015] In the present disclosure, the magnetic sensor (e.g., a Hall element) is retrofitted (externally attached) to the resin molded core member. That is, the attachment of the magnetic sensor to the resin molded core member is not essential but is performed as needed. This makes it easy to connect the resin molded core member without the magnetic sensor attached, and allows the moving distance of the mover to be freely increased.

[0016] The linear motor armature according to the present disclosure includes a resin molded core member having a plate-shaped core, magnetic pole teeth, and a coil, the coil being wound around each of a plurality of magnetic pole teeth arranged in parallel on one main surface of the plate-shaped core, the magnetic pole teeth and the coil being resin-molded, a heat transfer member attached with one main surface facing the other main surface of the plate-shaped core of the resin molded core member, which is not resin-molded, and a cooling mechanism attached to the other main surface of the heat transfer member.

[0017] In the present disclosure, the heat transfer member is attached to the resin molded core member in which the magnetic pole teeth and the coil are resin-molded in advance, thereby preventing warping of the heat transfer member.

[0018] The linear motor armature according to the present disclosure includes a plurality of resin molded core members, which are connected in the juxtaposition direction of the magnetic pole teeth.

[0019] In the present disclosure, the plurality of resin molded core members are connected in the direction in which the magnetic pole teeth are arranged side by side, so that when the armature is used as a stator, the moving distance of the mover (field magnet portion) can be freely increased.

[0020] In the linear motor armature according to the present disclosure, a magnetic sensor is attached to at least one end face of the resin molded core member in the direction in which the magnetic pole teeth are arranged side by side.

[0021] In the present disclosure, the magnetic sensor (e.g., a Hall element) is retrofitted (externally attached) to the resin molded core member. Attaching the magnetic sensor to the resin molded core member is not essential, but is performed as needed. This makes it easy to connect the resin molded core member without the magnetic sensor attached, and allows the moving distance of the mover to be freely increased. [Effects of the Invention]

[0022] According to the present disclosure, it is possible to provide a method for manufacturing an armature for a linear motor that can prevent warping of the heat transfer member, and an armature for a linear motor. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a diagram illustrating a schematic configuration of an armature for a linear motor according to an embodiment of the present invention. [Figure 2] 1 is a perspective view showing a schematic configuration of a resin molded core member of a linear motor armature according to an embodiment of the present invention; [Figure 3] FIG. 2 is a perspective view schematically illustrating a configuration of a core member embedded in a resin molded core member. [Figure 4] FIG. [Figure 5]1 is a diagram illustrating a schematic configuration of a cooling mechanism for a linear motor armature according to an embodiment of the present invention. [Figure 6] 5A to 5C are explanatory diagrams illustrating a method for manufacturing the linear motor armature according to the present embodiment. [Figure 7] 10A and 10B are explanatory views illustrating resin molding of a core member using a jig. [Figure 8] 10 is an explanatory diagram illustrating a state in which a resin molded core member and a heat transfer member are fastened together with screws. FIG. [Figure 9] 10 is an explanatory view showing another example of a configuration in which a heat transfer member is attached to a resin molded core member. FIG. [Figure 10] 1 is a perspective view showing an example of an armature manufactured using a manufacturing method for a linear motor armature according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will be described in detail with reference to the drawings showing embodiments thereof.

[0025] Fig. 1 is a diagram showing the schematic configuration of a linear motor armature 1 according to this embodiment. Fig. 1A is a plan view of the armature 1, and Fig. 1B is a side view of the armature 1. U, V, and W in Fig. 1B respectively represent the U-phase, V-phase, and W-phase of a three-phase AC power supply, and three pairs of forward and reverse slots form one set in order to perform three-phase parallel current conduction.

[0026] A linear motor has a mover and a stator that face each other at a predetermined distance, and as will be described later, the mover moves above the stator by thrust. For example, the armature 1 corresponds to either the mover or the stator of the linear motor. For convenience of explanation, the following description will be given assuming that the armature 1 is the stator.

[0027] The mover (field magnet section) is constructed by, for example, supporting and fixing multiple permanent magnets to a thin back yoke at an equal pitch and arranging them in the direction of movement (the direction of the arrow in Figure 1B). Each permanent magnet is magnetized in the thickness direction (the direction facing the armature 1), and the magnetization directions of adjacent permanent magnets are opposite to each other.

[0028] On the other hand, the armature 1, which is the stator, includes a resin molded core member 2 including a core member 10 (see the dashed line in Figure 1), a heat transfer member 3, and a cooling mechanism 4 for cooling the heat generated from the core member 10 via the heat transfer member 3.

[0029] 2 is a perspective view showing a schematic configuration of the resin molded core member 2 of the armature 1 according to this embodiment. The resin molded core member 2 is formed by resin-molding a core member 10. In other words, the core member 10 is embedded in the resin molded core member 2. The resin molded core member 2 has a rectangular shape in plan view similar to the core member 10, and is equipped with a heat transfer member 3 and a magnetic sensor (Hall element) 5 for detecting the position of the mover.

[0030] Fig. 3 is a perspective view that schematically shows the configuration of core member 10 embedded in resin molded core member 2, and Fig. 4 is a cross-sectional view of core member 10. Core member 10 includes a core 14 made of electromagnetic steel, which is a soft magnetic material, and coil 13.

[0031] The core 14 has a thin core plate (plate-shaped core) 11, on which a plurality of rectangular magnetic pole teeth 12 are integrally arranged at equal intervals in the moving direction. The plurality of magnetic pole teeth 12 are vertically erected on one main surface 111 of the plate-shaped core 11 facing the mover. In this embodiment, the core 14 is described as being divided into the plate-shaped core 11 and the magnetic pole teeth 12, but the core 14 is an integral piece formed by punching a laminated steel plate into a comb-teeth shape. Note that the core 14 does not have to be an integral piece, and may be a combination of the plate-shaped core 11 and the magnetic pole teeth 12. In other words, the integral plate-shaped core 11 and the magnetic pole teeth 12 may be formed from separate members.

[0032] A coil 13 is wound around each magnetic pole tooth 12. That is, the number of coils 13 is the same as the number of magnetic pole teeth 12. Each coil 13 is formed by being wound around a bobbin in advance, and is a hollow, approximately rounded rectangle extending along the length of the magnetic pole teeth 12, with multiple coils 13 arranged side by side in the arranging direction of the magnetic pole teeth 12. Adjacent coils 13 in the arranging direction are in contact with each other. That is, the core member 10 includes a core 14 consisting of the plate-shaped core 11 and the magnetic pole teeth 12, and the coils 13, and forms a rectangle as a whole in a planar view.

[0033] In addition, in the core member 10 (core 14), a plurality of circular screw holes 15 are formed in the plate-shaped core 11. Each screw hole 15 is formed from the other main surface 112 of the plate-shaped core 11 opposite to the one main surface 111 in the thickness direction of the plate-shaped core 11 to the base of the magnetic pole tooth 12. That is, the screw holes 15 of the core member 10 are formed at positions corresponding to the magnetic pole teeth 12 in the thickness direction of the plate-shaped core 11 (every other magnetic pole tooth 12 in FIG. 4).

[0034] In the armature 1, the core member 10 is covered with resin from one main surface 111 side of the plate core 11 to form a resin molded core member 2. The other main surface 112 of the plate core 11 is exposed on one surface of the resin molded core member 2 on the other main surface 112 side of the plate core 11. A heat transfer member 3 is attached to the one surface of the resin molded core member 2. That is, one main surface of the heat transfer member 3 abuts against the one surface of the resin molded core member 2, and the other main surface 112 of the plate core 11 exposed from the one surface of the resin molded core member 2 is in contact with the one main surface of the heat transfer member 3. A cooling mechanism 4 is attached to the other main surface of the heat transfer member 3. That is, the heat transfer member 3 is interposed between the resin molded core member 2 and the cooling mechanism 4. The heat transfer member 3 transfers heat from the coil 13 of the core member 10 (resin molded core member 2) to the cooling mechanism 4, and the cooling mechanism 4 cools the heat emitted from the coil 13.

[0035] As described above, the magnetic sensor (Hall element) 5 is attached to the resin molded core member 2. More specifically, the magnetic sensor 5 is externally attached to the center of the side surface (one end surface) of the resin molded core member 2 that is on one short side in the direction in which the magnetic pole teeth 12 are arranged side by side. The magnetic sensor 5 has, for example, a hexahedron shape extending in the thickness direction of the resin molded core member 2. As described above, the magnetic sensor 5 detects the position of the mover that is arranged opposite the core member 10 of the resin molded core member 2 with a gap therebetween.

[0036] The heat transfer member 3 is made of a metal with excellent thermal conductivity, such as aluminum or copper, and has a thin plate shape. In this embodiment, an aluminum plate is used. The heat transfer member 3 has approximately the same dimensions as the resin molded core member 2, and as described above, is interposed between the resin molded core member 2 and the cooling mechanism 4. The one main surface of the heat transfer member 3 abuts against the other main surface 112 of the resin molded core member 2, and the other main surface of the heat transfer member 3 abuts against the cooling mechanism 4.

[0037] The heat transfer member 3 has a plurality of through holes 31 (see FIG. 8) formed in positions corresponding to the screw holes 15 of the core member 10 (core 14) so ​​as to penetrate the heat transfer member 3 in the thickness direction. The through holes 31 are circular holes having a diameter larger than that of the screw holes 15, and countersinks are formed on the other main surface side of the heat transfer member 3.

[0038] Fig. 5 is a diagram showing a schematic configuration of the cooling mechanism 4 of the armature 1 according to this embodiment. Fig. 5A is a side view of the cooling mechanism 4, and Fig. 5B is a plan view of the cooling mechanism 4. The cooling mechanism 4 performs cooling using a refrigerant. A refrigerant flow path 41 is formed inside the cooling mechanism 4, and in Fig. 5, the refrigerant flow path 41 is indicated by a dashed line.

[0039] The cooling mechanism 4 has a plate shape that is rectangular in a plan view, and an inlet tube 61 and an outlet tube 62 for the refrigerant to the refrigerant flow path 41 are protruded from one end. More specifically, the inlet tube 61 and the outlet tube 62 are provided spaced apart from each other on both ends in the width direction at one end of the contact surface of the cooling mechanism 4 that contacts the other main surface of the heat transfer member 3. Hereinafter, for convenience of explanation, the inlet tube 61 and the outlet tube 62 are also collectively referred to as the inlet / outlet tubes 6.

[0040] The refrigerant flow path 41 is formed in a serpentine shape, and a joint (not shown) or the like is joined to the inlet / outlet cylinder 6. The cooling mechanism 4 (refrigerant flow path 41) is connected to a refrigerant supply source (not shown) through a pipe connected to the joint of the inlet / outlet cylinder 6. The refrigerant from the refrigerant supply source flows into the refrigerant flow path 41 through the inlet cylinder 61, flows out from the outlet cylinder 62 and returns to the refrigerant supply source.

[0041] As described above, the contact surface of the cooling mechanism 4 contacts the other main surface of the heat transfer member 3, so the heat from the coil 13 of the core member 10 (resin molded core member 2) transmitted via the heat transfer member 3 is cooled by the cooling mechanism 4.

[0042] In the armature 1 having the above-described configuration, when a three-phase alternating current is applied to the coils 13 of the armature 1 to generate a magnetic field in the magnetic pole teeth 12, the permanent magnets of the mover are sequentially magnetically attracted and repelled by this magnetic field, generating a thrust in the mover, causing the mover to move linearly in the moving direction relative to the armature 1.

[0043] A method for manufacturing the armature 1 having the above configuration will be described below. 6A to 6D are explanatory diagrams illustrating a method for manufacturing the linear motor armature 1 according to this embodiment. The armature 1 is manufactured in the order shown in FIGS. 6A to 6D.

[0044] First, as described above, the coil 13 is wound around each of the plurality of magnetic pole teeth 12 of the core 14 to produce the core member 10 as shown in FIG. 6A (core member preparation step).

[0045] The manufactured core member 10 is then resin molded (resin molding process). The resin molding process is performed using, for example, a jig 100 (mold). FIG. 7 is an explanatory diagram illustrating an example of resin molding of the core member 10 using the jig 100. As shown in FIG.

[0046] The jig 100 includes a rectangular flat plate portion 101 that conforms to the resin mold core member 2, and a hollow rectangular frame body 102 that has the same dimensions as the flat plate portion 101. The core member 10 is placed in the center of one surface of the flat plate portion 101, and as shown in Figure 7, the frame body 102 is placed over the core member 10 so that its edges are aligned with those of the flat plate portion 101. At this time, the frame body 102 clamps the coils 13 on one end side and the coils 13 on the other end side in the direction in which the coils 13 are arranged side by side. This holds all of the coils 13 (core members 10), prevents the core member 10 from shifting position, and prevents the core member 10 from floating above the flat plate portion 101. The flat plate portion 101 and the frame body 102 are fixed together watertight, and liquid resin at a high temperature of about 150°C is poured into the frame body 102. In this case, the side surface of the coil 13 at one end that is sandwiched by the frame 102 (the side surface of the coil 13 that abuts against the short side of the frame 102 at the one end) and the side surface of the coil 13 at the other end that is sandwiched by the frame 102 (the side surface of the coil 13 that abuts against the short side of the frame 102 at the other end) are not resin-molded (see FIG. 8). On the other hand, for example, a means can be employed in which a plurality of through holes that penetrate the flat plate portion 101 in the thickness direction are formed in the flat plate portion 101 of the jig 100 at positions corresponding to the screw holes 15 of the core member 10 (core 14), and the core member 10 and the flat plate portion 101 of the jig 100 are screwed together to fix the core member 10 so that it does not float above the flat plate portion 101. In this case, all surfaces of the core member 10 except the surface that abuts against the flat plate portion 101 can be resin-molded (see FIG. 9).

[0047] For example, when the liquid resin is cooled to room temperature and hardened, the resin mold core member 2 is completed, and the resin mold core member 2 is removed from the jig 100. In this way, the resin mold core member 2 as shown in Fig. 6B is obtained.

[0048] As described above, once the sufficiently cooled resin molded core member 2 is obtained, the heat transfer member 3 is attached to the other main surface of the resin molded core member 2 (heat transfer member attaching step). In this heat transfer member attaching step, the heat transfer member 3 is screwed to the other main surface of the resin molded core member 2, and fixed as shown in FIG. 6C.

[0049] Fig. 8 is an explanatory diagram illustrating a state in which the resin molded core member 2 and the heat transfer member 3 are screwed together. The resin molded core member 2 shown in Fig. 8 is formed by sandwiching the coil 13 on one end side and the coil 13 on the other end side between frames 102 in the juxtaposition direction of the coils 13 and molding them with resin. As shown in Fig. 8, the resin molded core member 2 is covered with resin 300 on all surfaces except for the side surface of the coil 13 on one end side that is sandwiched by the frame 102 (the left side surface in Fig. 8), the side surface of the coil 13 on the other end side that is sandwiched by the frame 102 (the right side surface in Fig. 8), and the other main surface.

[0050] Fig. 9 is an explanatory diagram showing another configuration example in which a heat transfer member 3 is attached to a resin molded core member 2. The resin molded core member 2 shown in Fig. 9 is formed by forming a plurality of through holes penetrating the flat plate portion 101 in the thickness direction in the flat plate portion 101 of the jig 100 at positions corresponding to the screw holes 15 of the core member 10 (core 14), and by screwing the core member 10 to the flat plate portion 101 of the jig 100, the core member 10 is fixed so that it does not float above the flat plate portion 101, and is then resin-molded. As shown in Fig. 9, the entire surface of the resin molded core member 2 except for the other main surface is covered with resin 300.

[0051] 8 and 9, the heat transfer member 3 is screwed to the resin molded core member 2, and the one main surface of the heat transfer member 3 abuts against the other main surface of the resin molded core member 2. More specifically, bolts 400 are inserted into the through holes 31 from the other main surface side of the heat transfer member 3 and screw into the screw holes 15 of the core member 10 (core 14). Note that in this embodiment, the heat transfer member 3 is screwed to the resin molded core member 2, but the attachment method is not limited to this, and any known attachment method can be used.

[0052] After the heat transfer member attaching step is completed in this manner, the cooling mechanism 4 is attached to the other main surface of the heat transfer member 3 (cooling mechanism attaching step). A known attaching method can be used to attach the cooling mechanism 4. For example, an adhesive or the like may be used.

[0053] After the heat transfer member attaching step and before the cooling mechanism attaching step, a magnetic sensor 5 for detecting the position of the mover may be attached externally to the resin molded core member 2 (magnetic sensor attaching step). As shown in Fig. 6D, the magnetic sensor 5 is attached to a side surface (one end face) of one short side of the resin molded core member 2, and is electrically connected to the core member 10 (core 14). The magnetic sensor 5 may be attached externally to the resin molded core member 2 after the cooling mechanism attaching step.

[0054] As described above, in the manufacturing method of the armature 1 according to this embodiment, the core member 10 is resin-molded without the heat transfer member 3 attached. That is, only the core member 10 is resin-molded to obtain the resin-molded core member 2, and the heat transfer member 3 is attached to the obtained resin-molded core member 2.

[0055] Therefore, in the resin molding process using high-temperature liquid resin, it is possible to prevent the heat transfer member 3 from warping due to the difference in thermal expansion between the resin and the heat transfer member 3.

[0056] Furthermore, in the manufacturing method of the armature 1 according to this embodiment, as described above, in the resin molding process, the core member 10 is held by the frame body 102 or the flat plate portion 101, or the core member 10 and the flat plate portion 101 are held by screws. Therefore, when the liquid resin is poured, the core member 10 is prevented from shifting position, and the core member 10 is prevented from floating off the flat plate portion 101, causing the liquid resin to flow onto the other main surface side of the resin molded core member 2, and it is possible to prevent a resin layer from being formed between the other main surface of the resin molded core member 2 and the heat transfer member 3.

[0057] Furthermore, in the manufacturing method of the armature 1 according to this embodiment, as described above, the magnetic sensor 5 for detecting the position of the mover is externally attached after the resin molded core member 2 is obtained. That is, the magnetic sensor 5 is selectively attached after the resin molded core member 2 is obtained. In other words, it is not essential to attach the magnetic sensor 5 to the resin molded core member 2, and it can be attached as needed. Therefore, by connecting resin molded core members 2 to which the magnetic sensor 5 is not attached (hereinafter referred to as a unit of resin molded core members 2), the moving distance of the mover can be freely increased. Furthermore, there is no need to provide a separate mounting seat (for example, a recess) for mounting the magnetic sensor 5 on the resin molded core member 2, and the shape of the jig 100 can be simplified.

[0058] Fig. 10 is a perspective view showing an example of an armature 1 manufactured using the manufacturing method for a linear motor armature 1 according to this embodiment. Fig. 10 illustrates an armature 1 formed by connecting a plurality of units of the resin molded core member 2 shown in Fig. 8. That is, Fig. 10 illustrates a case in which three units of the resin molded core member 2 obtained in the resin molding process described above are connected, thereby extending the moving distance of the mover.

[0059] 10, three resin molded core member 2 units are arranged in a row in the length direction, forming a row 200 of resin molded core members 2. That is, the three resin molded core member 2 units are arranged in a row along the direction in which the magnetic pole teeth 12 in each resin molded core member 2 unit are arranged.

[0060] 10, a magnetic sensor 5 is not provided in each resin molded core member 2 unit, but is attached only to the resin molded core member 2 unit at one end in the row 200 of resin molded core members 2. In addition, one common heat transfer member 3 is attached to the three resin molded core member 2 units.

[0061] If a magnetic sensor 5 is attached to each resin molded core member 2, it is difficult to extend the moving distance of the mover, but as described above, in the manufacturing method of the armature 1 according to this embodiment, the magnetic sensors 5 are selectively attached after obtaining the resin molded core members 2. Therefore, as shown in Fig. 10, units of resin molded core members 2 can be easily connected, and the moving distance of the mover can be freely extended.

[0062] The disclosed embodiments should be considered in all respects as illustrative and not restrictive. The scope of the present disclosure is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0063] The matters described in each embodiment can be combined with each other. Furthermore, the independent claims and dependent claims described in the claims can be combined with each other in any and all combinations, regardless of the reference format. Furthermore, the claims use a format in which a claim references two or more other claims (multiple claim format), but this is not limited to this. A multiple claim (multi-multi claim) that references at least one other multiple claim may also be used. [Explanation of symbols]

[0064] 1 armature 2. Resin mold core material 3 Heat transfer materials 4 Cooling mechanism 5 Magnetic sensor (Hall element) 10 Core member 11 Plate-shaped core 12 pole teeth 13 Coil 14 cores 15 screw holes 31 Through hole 100 Jig (mold) 111 One main surface 112 Other main surface 200 rows of resin mold core members

Claims

1. A method of manufacturing an armature for a linear motor, the armature comprising: a core member having a plate-like core, magnetic pole teeth, and a coil; a cooling mechanism for cooling the core member; and a heat transfer member disposed between the core member and the cooling mechanism and for transferring heat from the coil of the core member to the cooling mechanism, the method comprising: a core member preparing step of preparing the core member having the plurality of magnetic pole teeth on one main surface of the plate-shaped core, the coil being wound around each of the plurality of magnetic pole teeth; a resin molding step of resin-molding the magnetic pole teeth and the coil of the core member to produce a resin-molded core member; a heat transfer member mounting step of mounting the heat transfer member so that one main surface of the heat transfer member faces the other main surface of the plate-like core of the resin molded core member that is not resin molded; a cooling mechanism mounting step of mounting the cooling mechanism on the other main surface of the heat transfer member; A method for manufacturing an armature for a linear motor, comprising:

2. 2. The method for manufacturing an armature for a linear motor according to claim 1, wherein the heat transfer member attaching step includes a step of preparing a plurality of the resin molded core members and a step of connecting the respective resin molded core members in the direction in which the magnetic pole teeth are arranged.

3. 3. The method for manufacturing a linear motor armature according to claim 1, further comprising, after the heat transfer member attaching step, attaching a magnetic sensor to at least one end surface of the resin molded core member in the juxtaposition direction of the magnetic pole teeth.

4. a resin molded core member having a plate-shaped core, magnetic pole teeth, and a coil, the coil being wound around each of a plurality of magnetic pole teeth arranged side by side on one main surface of the plate-shaped core, and the magnetic pole teeth and the coil being resin-molded; a heat transfer member attached with one main surface facing the other main surface of the plate-shaped core of the resin molded core member that is not resin molded; a cooling mechanism attached to the other main surface of the heat transfer member; An armature for a linear motor comprising:

5. The resin mold core member is composed of a plurality of members, 5. The linear motor armature according to claim 4, wherein the plurality of resin molded core members are connected in the direction in which the magnetic pole teeth are arranged side by side.

6. 6. The linear motor armature according to claim 4, wherein a magnetic sensor is attached to at least one end surface of said resin molded core member in the direction in which said magnetic pole teeth are arranged.

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