JP6514978B2 - Stator, motor and method of manufacturing stator - Google Patents

Description

  The present invention relates to a stator used in a motor or the like, and a motor including the stator. The present invention also relates to a method of manufacturing a stator used in a motor or the like.

  Conventionally, a motor is known that includes a rotor and a cylindrical stator disposed on the outer peripheral side of the rotor (see, for example, Patent Document 1). In the motor described in Patent Document 1, the stator includes a stator core and a drive coil wound around teeth of the stator core via an insulator. The stator core is formed by combining a plurality of divided cores divided in the circumferential direction of the stator, and the divided core includes an outer yoke portion connected to the outer end of the teeth portion in the radial direction of the stator. In addition, Patent Document 1 describes that the stator core may be a so-called curling core formed by bending a band-shaped core in which outer yoke portions are integrally connected in an annular shape and connecting the end portions thereof. .

  For example, as shown in FIG. 8A, the curling core is formed of a linear band-like portion 103 constituted of a plurality of outer yoke portions 102 connected via a bending portion 101 and a plurality of outer yoke portions 102. It is formed using a core body 105 having teeth portions 104 projecting in a direction orthogonal to the longitudinal direction of the strip portion 103. Also, for example, as shown in FIG. 8B, in the curling core, the belt-like portion 103 is bent at a bending portion 101 so that the belt-like portion 103 has an annular shape and the teeth portion 104 protrudes inward in the radial direction. It is formed by bending and connecting both ends of the strip portion 103.

  Before the belt-like portion 103 is bent to form the curling core (the stator core 106) shown in FIG. 8B, the driving coil is wound around the teeth portion 104 through the insulator. That is, the drive coil is wound around the teeth portion 104 of the core body 105. Further, stator core 106 shown in FIG. 8B is used, for example, in a three-phase motor, and U-phase drive coils are wound around teeth portions 104a and 104d, and teeth portions 104b and 104e are used. The V-phase drive coil is wound, and the W-phase drive coil is wound around the teeth portions 104c and 104f. The teeth portions 104 a to 104 f are arranged in this order in the longitudinal direction of the strip portion 103. Moreover, let each of the outer yoke part 102 which each of teeth part 104a-104f connect is outer yoke part 102a-102f.

Unexamined-Japanese-Patent No. 2010-57211

  The inventor of the present application is examining adoption of a curling core such as a stator core 106 shown in FIG. 8 as a stator core used in a stator of a motor or the like. Further, the inventor of the present invention simplifies the processing of the end of the drive coil and reduces the number of terminal pins to which the end of the drive coil is connected to simplify the configuration of the stator. A U-phase drive coil is formed by sequentially winding one conducting wire around the teeth portions 104a and 104d via FIG. 9), and one conducting wire is applied to the teeth portions 104b and 104e via the insulator 107. Consider forming a V-phase drive coil by sequentially winding, and forming a W-phase drive coil by sequentially winding one lead wire around the teeth portions 104c and 104f via the insulator 107 doing.

  A single conducting wire is sequentially wound around teeth portions 104a and 104d disposed with teeth portions 104b and 104c interposed therebetween to form a U-phase drive coil, and disposed with teeth portions 104c and 104d interposed therebetween. A single conducting wire is wound sequentially around teeth 104b and 104e to form a V-phase drive coil, and one conducting wire is placed on teeth 104c and 104f disposed so as to sandwich teeth 104d and 104e. When the W-phase drive coil is formed by sequentially winding, the crossover wire 108 (see FIG. 9) that constitutes a part of the U-phase drive coil and the crossover that constitutes a part of the V-phase drive coil. It is preferable that the crossovers be routed so that the wires do not contact the crossovers that form part of the W-phase drive coil. In addition, there are cases where it is determined in the safety standards of products that the drive coils of each phase do not contact.

  Therefore, in this case, assuming that the direction opposite to the protrusion direction of the teeth portion 104 in the state before the band-like portion 103 is bent is a reverse protrusion direction, as shown in FIG. Preferably, the crossover wire 108 is disposed to pass through the side of the insulator 107 covering the outer yoke portions 102b and 102c in the direction in which it protrudes. Further, the crossovers of the V-phase drive coil are disposed to pass through the side of the insulator 107 covering the outer yoke portions 102c and 102d in the opposite direction, and the crossovers of the W-phase drive coil are outer yokes 102d, It is preferable to arrange | position so that the anti-projection direction side of the insulator 107 which covers 102e may be passed.

  However, when the crossover wire 108 of the U-phase drive coil is disposed to pass through the side of the insulator 107 covering the outer yoke portions 102 b and 102 c in the direction opposite to the projecting direction, the band portion 103 is bent at the bending portion 101. In addition, a large tension is generated in the connecting wire 108, and the connecting wire 108 may be disconnected at, for example, a portion K in FIG. Similarly, when the crossover of the V-phase drive coil is disposed to pass through the side of the insulator 107 covering the outer yoke portions 102c and 102d in the direction opposite to the projecting direction, the bridging portion 103 is bent. There is a risk of breaking the wire. In addition, when the crossover of the W-phase drive coil is disposed to pass through the side of the insulator 107 covering the outer yoke portions 102d and 102e in the opposite direction of the projecting direction, this crossover is formed when the strip portion 103 is bent. May break.

  Therefore, an object of the present invention is that, in a stator having a stator core that is a curling core, even when a crossover that forms a part of a coil is disposed on the outer peripheral side of the stator core when viewed from the axial direction of the stator. An object of the present invention is to provide a stator capable of preventing disconnection. Another object of the present invention is to provide a motor provided with such a stator. Furthermore, an object of the present invention is a method of manufacturing a stator having a stator core which is a curling core, wherein a crossover wire which constitutes a part of the coil is disposed on the outer peripheral side of the stator core when viewed from the axial direction of the stator. It is an object of the present invention to provide a method of manufacturing a stator that can prevent breakage of crossover wires.

  In order to solve the above problems, the stator of the present invention is formed in a tubular shape, and has a coil, an insulating member, and a stator core having a plurality of salient pole portions on which the coil is wound via the insulating member. The stator core includes: an outer circumferential ring portion formed in an annular shape; and a plurality of protrusions protruding from the outer circumferential ring portion toward the inner side in the radial direction of the stator and at regular intervals in the circumferential direction of the stator The outer ring portion is constituted by the same number of outer peripheral portions as the plurality of salient pole portions, the salient pole portion is formed at the center of the outer peripheral portion in the circumferential direction of the stator, and the insulating member is the shaft of the stator The plurality of outer circumferential coverings covering at least a part of the end face of the outer circumferential portion in the direction and the outer circumferential covering in the circumferential direction of the stator are disposed so as to be movable in the radial direction Via a deformable arm portion, characterized in that it comprises a projecting portion connected to the outer peripheral side covering portion.

  In the stator according to the present invention, the insulating member is disposed between the plurality of outer peripheral coverings covering the end face of the outer peripheral portion in the axial direction of the stator and the outer peripheral covering in the peripheral direction of the stator And a projecting portion connected to the outer circumferential side covering portion via an elastically deformable arm portion so as to allow the movement of the movable portion. Therefore, in the present invention, when winding the coil via the insulating member around the salient pole portion of the core body in a state where the plurality of outer peripheral portions are linearly connected, the crossover wire that constitutes a part of the coil is When the coil is wound so as to contact the outer end of the protrusion in the radial direction of the stator, the core core is bent at the boundary between the outer peripheral portion and the outer peripheral portion to form the stator core. It is possible to move the projection inward to reduce the tension acting on the crossover. Therefore, in the present invention, when viewed from the axial direction of the stator, disconnection of the crossover can be prevented even if the crossover is disposed on the outer peripheral side of the stator core which is the curling core.

  In the present invention, for example, the inner circumferential surface of the outer circumferential ring portion is formed so that the shape when viewed in the axial direction of the stator is a polygonal shape, and the projection is a polygonal when viewed in the axial direction of the stator It arrange | positions so that it may overlap with the vertex part of the internal peripheral surface of the outer periphery ring part which makes a shape. Further, in the present invention, for example, a crossover wire that constitutes a part of the coil is in contact with the outer end of the protrusion in the radial direction of the stator. Further, in the present invention, for example, the outer end of the protrusion in the radial direction of the stator protrudes outward in the radial direction of the stator than the outer circumferential surface of the outer circumferential ring.

  In the present invention, the insulating member is a first outer circumferential covering portion covering at least a part of one end face of the outer circumferential portion in the axial direction of the stator as the outer circumferential side covering portion, and the other end face of the outer circumferential portion in the axial direction of the stator And a first projection connected to the first outer covering via the arm as a projection, and a second outer covering via the arm. It is preferable to provide the 2nd projection part connected with a part. According to this structure, for example, using the first and second protrusions, the crossovers of the U-phase drive coil, the crossovers of the V-phase drive coil, and the crossovers of the W-phase drive coil. The crossover of the U-phase drive coil and the crossover of the W-phase drive coil are drawn on one end side of the outer periphery in the axial direction of the stator while preventing disconnection of the wire, and the outer periphery of the stator in the axial direction At the other end side, it becomes possible to route the connecting wire of the V-phase drive coil. Therefore, it is possible to prevent contact between the drive coils of each phase and prevent a short circuit between the drive coils of each phase while preventing disconnection of the connecting wires of the drive coils of each phase.

  In the present invention, for example, the protrusion is formed so that the shape when viewed in the axial direction of the stator is substantially triangular, and one vertex of the substantially triangular protrusion is a protrusion in the radial direction of the stator It is the outer end of the part.

  The stator of the present invention can be used for a motor having a drive magnet and a rotor disposed on the inner peripheral side of the stator. In this motor, when viewed from the axial direction of the stator, it is possible to prevent disconnection of the crossover even if the crossover is disposed on the outer peripheral side of the stator core which is the curling core.

  Further, in order to solve the above-mentioned problems, according to the manufacturing method of the stator of the present invention, the longitudinal direction of the strip portion from each of the linear strip portion and the plurality of outer portions formed by the plurality of outer portions connected via the bent portion Between a plurality of outer peripheral side covering portions covering the at least a part of the end face of the outer peripheral portion in the thickness direction of the core base body and the outer peripheral side covering portion on the core base body having a salient pole portion projecting in a direction orthogonal to the direction And a projecting part covering the salient pole part and a projection part connected to the outer peripheral covering part via an elastically deformable arm part so that the salient pole part can be moved in the projecting direction An insulating member attaching step of attaching an insulating member, a coil winding step of winding a coil around a plurality of salient pole portions through the salient pole covering portion after the insulating member attaching step, and a band-shaped portion having an annular shape after the coil winding step The outer peripheral ring that forms the And bending the band portion at the bending portion so that the salient pole portion protrudes inward in the radial direction of the outer peripheral ring portion or the outer peripheral arc portion, and a reverse direction of the protruding direction of the salient pole portion is In the case of one direction, in the coil winding step, a plurality of crossover wires forming a part of the coil are in contact with the end surface on the first direction side of the projecting portion protruding in the first direction side from the outer circumferential side covering portion. At the salient pole portion, a coil is wound, and in the band-shaped portion bending step, the protruding portion is pushed by the crossover inward in the radial direction of the annular outer peripheral ring portion or the arc outer peripheral arc portion, and the arm portion is deformed. Moving the protrusion inward in the radial direction of the outer circumferential ring or outer circumferential arc, or pushing the protrusion by the radial inward in the radial direction of the outer circumferential ring or outer circumferential arc and breaking the arm Or, it is characterized in that the arm is broken off.

  In the method of manufacturing a stator according to the present invention, the salient pole portion is connected to the outer circumferential side covering portion via the elastically deformable arm portion so that movement in the projecting direction of the salient pole portion becomes possible. A projection which protrudes in a first direction side beyond the outer circumferential covering portion is formed on the insulating member. In the present invention, in the coil winding step, the coil is wound around the plurality of salient pole portions so that the crossover wire contacts the end face on the first direction side of the protrusion, and the diameter in the band portion bending step The protrusion is pushed by the crossover inward in the direction to deform the arm and move the protrusion inward in the radial direction, or the protrusion is pushed by the crossover in the radial direction and the arm is deformed It is broken or the arms are broken. Therefore, in the present invention, it is possible to reduce the tension acting on the crossover in the band-shaped portion bending process. Therefore, in the present invention, when viewed from the axial direction of the stator, disconnection of the crossover can be prevented even if the crossover is disposed on the outer peripheral side of the stator core which is the curling core.

  As described above, according to the present invention, when viewed from the axial direction of the stator, it is possible to prevent the disconnection of the crossover even if the crossover is disposed on the outer peripheral side of the stator core which is the curling core.

It is a sectional view of a pump device concerning an embodiment of the invention. It is a top view of the stator core, insulator, and terminal pin which are shown in FIG. It is a top view of the stator core shown in FIG. It is an enlarged view of the E section of FIG. It is a figure for demonstrating the manufacturing method of the stator shown in FIG. 1, (A) is a top view of core core object used as a stator core, (B) attaches insulator and terminal pin to core core body shown to (A) It is a top view of the state where it was made. It is a perspective view in the state where an insulator and a terminal pin were attached to a core original object shown in Drawing 5 (B). It is an enlarged view of the F section of FIG. It is a figure for demonstrating the structure of the stator core concerning a prior art. It is a figure for demonstrating the problem of a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic configuration of pump device)
FIG. 1 is a cross-sectional view of a pump device 1 in which a stator 6 according to an embodiment of the present invention is used. In the following description, the upper side (Z1 direction side) of FIG. 1 is the “upper” side, and the lower side (Z2 direction side) of FIG. 1 is the “lower” side.

  The pump device 1 in which the stator 6 of the present embodiment is used is a type of pump called a canned pump, and includes an impeller 2, a motor 3 for rotating the impeller 2, and a circuit board 4. The motor 3 is a three-phase motor. The motor 3 is composed of a rotor 5 and a stator 6. The impeller 2, the motor 3 and the circuit board 4 are disposed inside a case body constituted by a housing 7 and an upper case 8 covering the upper portion of the housing 7. The housing 7 and the upper case 8 are fixed to each other by screws (not shown).

  The upper case 8 is formed with a fluid suction portion 8 a and a fluid discharge portion 8 b. Between the housing 7 and the upper case 8, there is formed a pump chamber 9 through which the fluid sucked from the suction portion 8a passes toward the discharge portion 8b. In addition, a seal member (O ring) 10 for securing the sealing property of the pump chamber 9 is disposed at a joint portion between the housing 7 and the upper case 8. The housing 7 is a partition member 11 having a partition 11 a disposed between the pump chamber 9 and the stator 6 so as to separate the pump chamber 9 and the stator 6, and a resin made of resin covering the lower surface and the side of the partition member 11. And a sealing member 12.

  The rotor 5 includes a drive magnet 14, a cylindrical sleeve 15, and a holding member 16 for holding the drive magnet 14 and the sleeve 15. The holding member 16 is formed in a substantially cylindrical shape with a hook. The drive magnet 14 is fixed to the outer peripheral side of the holding member 16, and the sleeve 15 is fixed to the inner peripheral side of the holding member 16. The impeller 2 is fixed to a flange portion 16 a of the holding member 16 disposed on the upper side. The impeller 2 and the rotor 5 are disposed inside the pump chamber 9.

  The rotor 5 is rotatably supported by the fixed shaft 17. The fixed shaft 17 is disposed such that the axial direction of the fixed shaft 17 coincides with the vertical direction, and the vertical direction is the axial direction of the rotor 5. The upper end of the fixed shaft 17 is held by the upper case 8, and the lower end of the fixed shaft 17 is held by the housing 7. The fixed shaft 17 is inserted into the inner peripheral side of the sleeve 15. In addition, a thrust bearing member 18 that is in contact with the upper end surface of the sleeve 15 is attached to the fixed shaft 17. In the present embodiment, the sleeve 15 functions as a radial bearing of the rotor 5, and the sleeve 15 and the thrust bearing member 18 function as a thrust bearing of the rotor 5.

  The stator 6 includes a drive coil 23 as a coil, a stator core 24, and an insulator 25 as an insulating member, and is formed in a tubular shape as a whole. Specifically, the stator 6 is formed in a substantially cylindrical shape. The stator 6 is disposed on the outer peripheral side of the rotor 5 via the partition wall 11 a (that is, the rotor 5 is disposed on the inner peripheral side of the stator 6), and the stator 6 is in the axial direction of the stator 6 It is arrange | positioned so that the up-down direction may correspond. That is, the vertical direction is the axial direction of the stator 6. Further, the stator 6 is provided with a terminal pin 26 to which an end portion of the drive coil 23 is twisted and electrically connected. The specific configuration of the stator 6 will be described later. In the following description, the radial direction of the rotor 5 and the stator 6 is referred to as “radial direction”, and the circumferential direction (circumferential direction) of the rotor 5 and the stator 6 is referred to as “circumferential direction”.

  As described above, the partition wall member 11 includes the partition wall 11a. The partition wall 11a is formed in a substantially bottomed cylindrical shape with a ridge, and includes a cylindrical portion 11b, a bottom portion 11c, and a ridge portion 11d. The cylindrical portion 11 b is formed in a cylindrical shape, and is disposed so as to cover the outer peripheral surface of the drive magnet 14. The bottom portion 11c is formed in a disk shape that closes the lower end of the cylindrical portion 11b. The flange portion 11d is formed so as to extend outward in the radial direction from the upper end of the cylindrical portion 11b.

  A shaft holding portion 11 h for holding the lower end side of the fixed shaft 17 is formed on the upper surface of the bottom portion 11 c. On the lower surface of the bottom portion 11 c, fixing protrusions 11 j for fixing the circuit board 4 to the partition wall member 11 and positioning protrusions 11 k for positioning the circuit board 4 are formed. As shown in FIG. 1, the pump chamber 9 is located inside and above the partition 11a, and the impeller 2 and the rotor 5 are disposed inside and above the partition 11a. The partition wall 11 a functions to prevent the inflow of the fluid in the pump chamber 9 to the location of the stator 6.

  The circuit board 4 is fixed to the lower surface side of the bottom portion 11 c so that the thickness direction of the circuit board 4 coincides with the vertical direction. Further, the circuit board 4 is fixed to the lower surface side of the bottom portion 11c by a screw 34 screwed into the fixing protrusion 11j in a state of being positioned by the fixing protrusion 11j and the positioning protrusion 11k. The lower end portion of the terminal pin 26 is soldered and fixed to the circuit board 4.

  The resin sealing member 12 is provided to completely cover the circuit board 4 and the drive coil 23 and the like and to protect the circuit board 4 and the drive coil 23 and the like from the fluid. The resin sealing member 12 is formed by injecting a resin material to the partition wall member 11 in a state in which the circuit board 4 and the stator 6 are fixed. Specifically, the partition member 11 to which the circuit board 4 and the stator 6 are fixed is disposed in a mold, and the resin sealing member 12 is formed by injecting and curing a resin material in the mold. There is. The resin sealing member 12 is formed in a substantially bottomed cylindrical shape as a whole, and completely covers the circuit board 4, the stator 6, the cylindrical portion 11 b and the bottom portion 11 c. Moreover, the resin sealing member 12 covers the lower surface of the collar portion 11 d.

(Configuration of the stator)
FIG. 2 is a plan view of stator core 24, insulator 25 and terminal pin 26 shown in FIG. 1. FIG. 3 is a plan view of stator core 24 shown in FIG. FIG. 4 is an enlarged view of part E of FIG.

  As described above, the stator 6 includes the drive coil 23, the stator core 24, the insulator 25, and the terminal pin 26. The stator core 24 is a laminated core formed by laminating thin magnetic plates made of a magnetic material. As shown in FIG. 3, the stator core 24 includes an outer circumferential ring 24 a formed annularly, and a plurality of salient pole portions 24 b to 24 g protruding inward in the radial direction from the outer circumferential ring 24 a. . The stator core 24 of the present embodiment includes six salient pole portions 24 b to 24 g. The six salient pole portions 24b to 24g are formed at equal angular pitches, and are arranged at regular intervals in the circumferential direction. In addition, the salient pole portions 24b to 24g are arranged in this order in the circumferential direction. The stator core 24 may not be a laminated core.

  The outer peripheral ring portion 24a is formed in an annular shape in which the shape of the outer peripheral surface when viewed in the vertical direction is substantially circular and the shape of the inner peripheral surface when viewed in the vertical direction is substantially hexagonal. The outer circumferential surface of the outer circumferential ring portion 24 a constitutes the outer circumferential surface of the stator core 24. Further, the outer peripheral ring portion 24a is configured by six outer peripheral portions 24h. That is, the outer peripheral ring portion 24a is configured by the same number of outer peripheral portions 24h as the salient pole portions 24b to 24g. A portion of the outer circumferential ring portion 24a in the circumferential direction, which is a portion between one vertex of the inner circumferential surface of the outer circumferential ring portion 24a having a substantially hexagonal shape when viewed in the vertical direction, and a vertex adjacent to the vertex It is one outer peripheral portion 24h. That is, a portion corresponding to one side of the inner peripheral surface of the outer peripheral ring portion 24a which is a part of the outer peripheral ring portion 24a in the circumferential direction and has a substantially hexagonal shape when viewed in the vertical direction becomes one outer peripheral portion 24h. There is.

  The salient pole portions 24b to 24g are formed at the center of the outer peripheral portion 24h in the circumferential direction. Tip portions (radially inner end portions) of the salient pole portions 24b to 24g are formed in a substantially arc shape spreading toward both sides in the circumferential direction. The inner peripheral surface of the tip end portion of the salient pole portions 24b to 24g faces the outer peripheral surface of the drive magnet 14 via the cylindrical portion 11b.

  Further, the stator core 24 is bent at the boundary between the outer peripheral portion 24 h and the outer peripheral portion 24 h by connecting the six outer peripheral portions 24 h (see FIG. 5A), which were linearly connected, to connect the end portions thereof. It is a curling core formed. Therefore, as shown in FIG. 3, a joint 24j is formed at one place between the outer circumferential ring portions 24a in the circumferential direction. In this embodiment, a joint 24j is formed at one place between the outer peripheral portion 24h to which the salient pole portion 24b is connected and the outer peripheral portion 24h to which the salient pole portion 24g is connected.

  The insulator 25 is formed of an insulating resin material. The insulator 25 is composed of two upper insulators and lower insulators divided into two in the vertical direction. Alternatively, the insulator 25 is integrally formed with the stator core 24 by insert molding. The insulator 25 is provided with a first covering portion 25a as a salient pole covering portion that covers the salient pole portions 24b to 24g.

  Moreover, the insulator 25 is provided with the 2nd covering part which covers outer peripheral part 24h. The second covering portion includes six outer peripheral covering portions 25b to 25g covering a part of the lower end surface of the outer peripheral portion 24h (that is, one end surface of the outer peripheral portion 24h in the axial direction of the stator 6), and the outer peripheral portion 24h And six outer peripheral side covering portions 25h to 25m (see FIG. 6) covering a part of the upper end surface (that is, the other end surface of the outer peripheral portion 24h in the axial direction of the stator 6). The outer circumferential covering portions 25b to 25g of the present embodiment are first outer circumferential covering portions, and the outer circumferential covering portions 25h to 25m are second outer circumferential covering portions. The outer circumferential covering portions 25b to 25g may cover the entire lower end surface of the outer circumferential portion 24h. Further, the outer peripheral side covering portions 25h to 25m may cover the entire upper end surface of the outer peripheral portion 24h.

  The outer peripheral side covering portions 25b and 25h cover a part of the outer peripheral portion 24h to which the salient pole portion 24b is connected from both upper and lower sides. The outer peripheral side covering portions 25c, 25i cover a part of the outer peripheral portion 24h to which the salient pole portion 24c is connected from both upper and lower sides. The outer peripheral side covering portions 25d, 25j cover a part of the outer peripheral portion 24h to which the salient pole portion 24d is connected from both upper and lower sides. The outer peripheral side covering portions 25e, 25k cover a part of the outer peripheral portion 24h to which the salient pole portion 24e is connected from both upper and lower sides. The outer peripheral side covering portions 25f, 25l cover a part of the outer peripheral portion 24h to which the salient pole portion 24f is connected from both the upper and lower sides. The outer peripheral side covering portions 25g, 25m cover a part of the outer peripheral portion 24h to which the salient pole portion 24g is connected from both upper and lower sides. Terminal pins 26 are fixed to the outer circumferential side covering portions 25b to 25g. The terminal pin 26 is fixed so as to project downward from the outer peripheral side covering portions 25b to 25g. In addition, one terminal pin 26 is fixed to one outer peripheral side covering portion 25b to 25g.

  Moreover, the insulator 25 is provided with the protrusion part 25p arrange | positioned between the outer peripheral side covering parts 25b-25m in the circumferential direction. As shown in FIG. 2, on the lower side of the outer peripheral ring portion 24a, the protrusions 25p are arranged at five locations between the outer peripheral side covering portions 25b to 25g except between the outer peripheral side covering portion 25b and the outer peripheral side covering portion 25g. It is done. That is, on the lower side of the outer circumferential ring portion 24a, between the outer circumferential covering portion 25b and the outer circumferential covering portion 25c in the circumferential direction, between the outer circumferential covering portion 25c and the outer circumferential covering portion 25d, and the outer circumferential covering portion 25d Protrusions 25p are arranged at five locations between the outer covering 25e, between the outer covering 25e and the outer covering 25f, and between the outer covering 25f and the outer covering 25g. . Similarly, on the upper side of the outer circumferential ring portion 24a, the protrusions 25p are disposed at five locations between the outer circumferential covering portions 25h to 25m except between the outer circumferential covering portion 25h and the outer circumferential covering portion 25m.

  As shown in FIG. 4, the protrusion 25 p is capable of moving in the radial direction with respect to the outer peripheral side covering portions 25 b to 25 m via the arm portion 25 r elastically deformable so as to be movable in the radial direction. Connected to That is, on the lower side of the outer peripheral ring portion 24a, the outer peripheral side covering portion 25b and the outer peripheral side covering portion 25c are connected in the circumferential direction via the one protrusion portion 25p and the two arm portions 25r. The part 25c and the outer peripheral covering 25d are connected, the outer peripheral covering 25d and the outer peripheral covering 25e are connected, and the outer peripheral covering 25e and the outer peripheral covering 25f are connected, and the outer peripheral covering 25f and the outer peripheral The cover 25g is connected.

  Further, on the upper side of the outer peripheral ring portion 24a, the outer peripheral side covering portion 25h and the outer peripheral side covering portion 25i are connected in the circumferential direction via one protrusion 25p and two arm portions 25r, and the outer peripheral side covering portion 25i and the outer circumferential covering 25j are connected, the outer circumferential covering 25j and the outer circumferential covering 25k are connected, the outer circumferential covering 25k and the outer circumferential covering 25l are connected, and the outer circumferential covering 251 and the outer circumferential covering Part 25m is connected. The outer circumferential covering portion 25b and the outer circumferential covering portion 25g are not connected in the circumferential direction, and the outer circumferential covering portion 25h and the outer circumferential covering portion 25m are not connected.

  The protrusion 25p is formed to have a substantially triangular shape when viewed in the vertical direction, and one vertex of the substantially triangular protrusion 25p is the outer end of the protrusion 25p in the radial direction. ing. Specifically, the protrusions 25p are formed so as to have a substantially isosceles triangular shape when viewed in the vertical direction. Further, one apex of the protrusion 25p corresponding to the apex angle of the substantially isosceles triangle is the outer end of the protrusion 25p in the radial direction. In addition, one vertex of the protrusion 25p which is the outer end of the protrusion 25p in the radial direction is formed in a curved surface shape (R shape). Therefore, in the manufacturing process of the stator 6 described later, it is possible to prevent the disconnection of the connecting wire 23a when the connecting wire 23a described later which constitutes a part of the drive coil 23 contacts the projection 25p. .

  As shown in FIG. 2, the outer end of the protrusion 25 p in the radial direction protrudes outward in the radial direction more than the outer peripheral surface of the outer peripheral ring 24 a of the stator core 24. Further, the outer end of the protrusion 25p in the radial direction is formed in a curved shape. The protrusions 25p are disposed so as to overlap with the apexes of the inner peripheral surface of the outer peripheral ring 24a having a substantially hexagonal shape when viewed in the vertical direction. In this embodiment, the projection 25p connected to the outer circumferential coverings 25b to 25g through the arm 25r is a first projection, and the projection 25p connected to the outer circumferential coverings 25h to 25m through the arm 25r , The second protrusion.

  The arm 25 r is elastically deformable as described above. That is, the arm 25 r has springability (flexibility). The arm 25 r is formed in a thin strip shape having a substantially U-shape when viewed in the vertical direction. The arms 25 r are disposed on both ends of the protrusion 25 p in the circumferential direction. Further, the arm 25 r is connected to the vicinity of each of two apexes corresponding to the base angle among the three apexes of the projection 25 p whose shape when viewed in the vertical direction is substantially isosceles triangle. .

  The drive coil 23 is constituted by a conducting wire made of an aluminum alloy or a copper alloy. The driving coil 23 is wound around the salient pole portions 24 b to 24 g via the first covering portion 25 a of the insulator 25. As described above, the motor 3 is a three-phase motor, and the stator 6 includes the U-phase drive coil 23, the V-phase drive coil 23, and the W-phase drive coil 23. In this embodiment, the U-phase drive coil 23 is wound around the salient pole portions 24b and 24e, and the V-phase drive coil 23 is wound around the salient pole portions 24c and 24f, and the W-phase drive coil is wound. The numeral 23 is wound around the salient pole portions 24d and 24g.

  Further, in the present embodiment, the U-phase drive coil 23 is formed by sequentially winding one lead wire around the salient pole portions 24 b and 24 e. As shown in FIG. 4, the connecting wire 23a which constitutes a part of the U-phase drive coil 23 is routed so as to pass through the outer peripheral side of the outer peripheral side covering portions 25c, 25d. That is, the connecting wire 23 a of the U-phase drive coil 23 is routed at the lower end side of the stator core 6. One end side of the U-phase drive coil 23 is entangled and fixed to the terminal pin 26 disposed outside the salient pole portion 24 b in the radial direction, and the other end side of the U-phase drive coil 23 has a diameter It is wound around and fixed to the terminal pin 26 disposed on the outside of the salient pole portion 24e in the direction.

  The crossover wire 23a of the U-phase drive coil 23 is in contact with the outer end of the protrusion 25p in the radial direction. Specifically, the crossover wire 23a of the U-phase drive coil 23 is a radially outer end of the projection 25p disposed between the outer circumferential covering 25b and the outer circumferential covering 25c, and the outer circumferential covering 25c. And the radially outer end of the projection 25p disposed between the outer circumferential covering 25d and the radial outer end of the projection 25p disposed between the outer circumferential covering 25d and the outer circumferential covering 25e In contact with The crossover wire 23a of the U-phase drive coil 23 includes a protrusion 25p disposed between the outer circumferential covering 25b and the outer circumferential covering 25c, an outer circumferential covering 25c, and an outer circumferential covering 25d. It does not have to be in contact with at least one of the radially outer ends of the projection 25p disposed between the projections 25p and the projection 25p disposed between the outer circumferential covering 25d and the outer circumferential covering 25e. .

  Similarly, the V-phase drive coil 23 is formed by sequentially winding one lead wire around the salient pole portions 24c and 24f, and forms a part of the V-phase drive coil 23. The line 23a is routed to pass through the outer peripheral side of the outer peripheral side covering portions 25j, 25k. That is, the connecting wire 23 a of the V-phase drive coil 23 is routed at the upper end side of the stator core 6. One end side of the V-phase drive coil 23 is entangled and fixed to the terminal pin 26 disposed outside the salient pole portion 24c in the radial direction, and the other end side of the V-phase drive coil 23 has a diameter It is wound around and fixed to the terminal pin 26 disposed on the outside of the salient pole portion 24f in the direction.

  In addition, the crossover wire 23a of the V-phase drive coil 23 includes the radially outer end of the protrusion 25p disposed between the outer circumferential covering 25i and the outer circumferential covering 25j, the outer circumferential covering 25j, and the outer circumferential side. Contact with the radially outer end of the projection 25p disposed between the cover 25k and the radially outer end of the projection 25p disposed between the outer circumferential cover 25k and the outer circumferential cover 25l ing. The crossover wire 23a of the V-phase drive coil 23 includes a protrusion 25p disposed between the outer covering 25i and the outer covering 25j, an outer covering 25j, and an outer covering 25k. It does not have to be in contact with at least one of the radially outer ends of the projection 25p disposed between the projections 25p and the projection 25p disposed between the outer circumferential covering 25k and the outer circumferential covering 25l. .

  Further, the W-phase drive coil 23 is formed by sequentially winding one lead wire around the salient pole portions 24 d and 24 g, and a crossover wire that constitutes a part of the W-phase drive coil 23. 23a is routed so as to pass through the outer peripheral side of the outer peripheral side covering portions 25e, 25f. That is, the connecting wire 23 a of the W-phase drive coil 23 is routed at the lower end side of the stator core 6. One end of the W-phase drive coil 23 is entangled and fixed to the terminal pin 26 disposed outside the salient pole portion 24 d in the radial direction, and the other end of the W-phase drive coil 23 has a diameter It is wound around and fixed to the terminal pin 26 disposed on the outside of the salient pole portion 24g in the direction.

  The crossover wire 23a of the W-phase drive coil 23 includes the radially outer end of the projection 25p disposed between the outer circumferential covering 25d and the outer circumferential covering 25e, the outer circumferential covering 25e, and the outer circumferential side. Contact with the radially outer end of the projection 25p disposed between the cover 25f and the radially outer end of the projection 25p disposed between the outer circumferential cover 25f and the outer circumferential cover 25g ing. The crossover wire 23a of the W-phase drive coil 23 includes a protrusion 25p disposed between the outer circumferential covering 25d and the outer circumferential covering 25e, an outer circumferential covering 25e, and an outer circumferential covering 25f. It does not have to be in contact with at least one of the radially outer ends of the projection 25p disposed between the projections 25p and the projection 25p disposed between the outer circumferential covering 25f and the outer circumferential covering 25g. .

(Method of manufacturing stator)
FIG. 5 is a view for explaining the method of manufacturing the stator 6 shown in FIG. 1, (A) is a plan view of the core body 54 to be the stator core 24, (B) is a core body shown in (A) It is a top view in the state where insulator 24 and terminal pin 26 were attached to 54. FIG. 6 is a perspective view of a state in which the insulator 24 and the terminal pin 26 are attached to the core body 54 shown in FIG. 5 (B). FIG. 7 is an enlarged view of a part F of FIG.

  The stator 6 is manufactured as follows. That is, first, as shown in FIG. 5 (B), the insulator 25 as the insulating member is attached to the core body 54 to be the stator core 24 (insulating member attaching step). As shown in FIG. 5 (A), the core body 54 is formed from a linear strip 54b constituted by six outer peripheral portions 24h connected via a bent portion 54a and each of six outer peripheral portions 24h. It has six salient pole parts 24b-24g which project in the X1 direction which intersects perpendicularly with the longitudinal direction of beltlike part 54b.

  As described above, the insulator 25 includes the first covering portion 25a that covers the salient pole portions 24b to 24g and the second covering portion that covers the outer peripheral portion 24h. The second covering portion includes outer peripheral covering portions 25b to 25m. That is, the second covering portion is provided with outer peripheral covering portions 25b to 25m covering a part of both end surfaces of the outer peripheral portion 24h in the thickness direction of the core body 54 (vertical direction in FIG. 5). Moreover, the insulator 25 is provided with the protrusion part 25p and the arm part 25r.

  As described above, the insulator 25 is constituted by two upper insulators and lower insulators divided into two in the vertical direction, or integrally formed with the stator core 24 by insert molding. Therefore, in the insulating member attaching step, the insulator 25 is attached to the core body 54 by fixing the upper insulator and the lower insulator to each other in a state where the core body 54 is sandwiched between the upper insulator and the lower insulator. Alternatively, in the insulating member attaching step, the insulator 25 is attached to the core body 54 by insert molding. Further, in the insulating member attaching step, the terminal pin 26 is fixed to the outer circumferential side covering portions 25b to 25g.

  Assuming that the direction opposite to the X1 direction, which is the projecting direction of the salient pole portions 24b to 24g with respect to the strip portion 54b, is X2, the insulator 25 is attached to the core body 54 as shown in FIG. The end surface on the X2 direction side of the protrusion 25p protrudes to the X2 direction side more than the outer peripheral side covering portions 25b to 25m. Further, the end surface on the X2 direction side of the protrusion 25p protrudes in the X2 direction side with respect to the band-like portion 54b, and the end surface on the X2 direction side of the protrusion 25p extends to the X2 direction side than the outer peripheral side covering portions 25b to 25m. It protrudes greatly. The X2 direction in this embodiment is a first direction.

  Thereafter, the drive coil 23 is wound around the salient pole portions 24b to 24g via the first covering portion 25a (coil winding step). Specifically, after one end side of the lead forming the U-phase drive coil 23 is twisted and fixed to the terminal pin 26 disposed on the X2 direction side of the salient pole portion 24b, the lead is salient pole portion 24b , 24e sequentially, the other end side of the lead wire is wound around and fixed to the terminal pin 26 arranged on the X2 direction side of the salient pole portion 24e. At this time, the X2 direction end of the projection 25p disposed between the outer circumferential covering 25b and the outer circumferential covering 25c, and the projection disposed between the outer circumferential covering 25c and the outer circumferential covering 25d. The crossover wire 23a of the U-phase drive coil 23 is specified at the X2 direction end of 25p and at the X2 direction end of the projection 25p disposed between the outer peripheral covering 25d and the outer peripheral covering 25e. Draw the lead wire to make contact with the contact pressure of.

  Further, in the coil winding step, one end side of the lead forming the V-phase drive coil 23 is wound around and fixed to the terminal pin 26 arranged on the X2 direction side of the salient pole portion 24c, and then the lead is protruded After sequentially winding around the pole portions 24c and 24f, the other end side of the conducting wire is wound around and fixed to the terminal pin 26 disposed on the X2 direction side of the salient pole portion 24f. At this time, the X2 direction end of the protrusion 25p disposed between the outer circumferential covering 25i and the outer circumferential covering 25j, and the projection disposed between the outer circumferential covering 25j and the outer circumferential covering 25k. The crossover wire 23a of the V-phase drive coil 23 is specified at the X2 direction end of 25p, and at the X2 direction end of the protrusion 25p disposed between the outer peripheral covering 25k and the outer peripheral covering 25l. Draw the lead wire to make contact with the contact pressure of.

  Further, in the coil winding step, one end side of the lead forming the W-phase drive coil 23 is wound around and fixed to the terminal pin 26 disposed on the X2 direction side of the salient pole portion 24d, and then the lead is protruded After sequentially winding around the pole portions 24d and 24g, the other end side of the conducting wire is wound around and fixed to the terminal pin 26 disposed on the X2 direction side of the salient pole portion 24g. At this time, the X2 direction end of the projection 25p disposed between the outer circumferential covering 25d and the outer circumferential covering 25e, and the projection disposed between the outer circumferential covering 25e and the outer circumferential covering 25f. The crossover wire 23a of the W-phase drive coil 23 is specified at the X2 direction end of 25p, and at the X2 direction end of the protrusion 25p disposed between the outer circumferential covering 25f and the outer circumferential covering 25g. Draw the lead wire to make contact with the contact pressure of.

  Thereafter, the strip 54b is bent so that the linear strip 54b becomes an annular outer ring 24a and the salient pole portions 24b to 24g project inward in the radial direction in the outer ring 24a. It bend | folds in the part 54a (band-like part bending process). In the belt-like portion bending process, since the connecting wire 23a is pulled, the projecting portion 25p is pushed radially inward by the connecting wire 23a, and the arm 25r is deformed, and as shown in FIG. The projection 25p moves inward in the radial direction as shown in FIG. That is, the protrusion 25p and the arm 25r function to relieve the tension of the connecting wire 23a when the stator 6 is manufactured. Further, in the band-shaped portion bending step, the end portions of the band-shaped portion 54b are connected by welding or the like. A portion where the end portions of the strip portion 54b are connected is a joint 24j. In addition, when the tension of the connecting wire 23a is increased after the band-shaped portion bending process, the protrusion 25p moves further inward in the radial direction, and the tension of the connecting wire 23a is relaxed.

(Main effects of this form)
As described above, in the present embodiment, the insulator 25 includes the projection 25p disposed between the outer circumferential coverings 25b to 25m in the circumferential direction, and the projection 25p includes the outer circumferential coverings 25b to 25m. It connects with the outer peripheral side covering parts 25b-25m via the arm part 25r which can be elastically deformed so that the movement to radial direction is attained with respect to. Further, in the present embodiment, in the coil winding step of manufacturing the stator 6, the drive coil is provided on the end surface of the protrusion 25p on the X2 direction side which protrudes more in the X2 direction than the outer circumferential covering 25b to 25m. The drive coil 23 is wound around the salient pole portions 24b to 24g so that the connecting wires 23a of 23 are brought into contact with a predetermined contact pressure, and in the band-like portion bending step, the protruding portions 25p are made radial by the connecting wires 23a. When pushed inward, the arm 25r is deformed, and the projection 25p moves inward in the radial direction. Therefore, in the present embodiment, it is possible to reduce the tension acting on the connecting wire 23a in the band-shaped portion bending step. Therefore, in the present embodiment, even when the connecting wire 23a is disposed on the outer peripheral side of the stator core 24 which is the curling core when viewed from the vertical direction, it is possible to prevent the disconnection of the connecting wire 23a.

  In the present embodiment, the protrusions 25p are disposed between the outer peripheral side covering portions 25b to 25m on both upper and lower sides of the outer peripheral ring portion 24a. Further, in the present embodiment, the crossover 23a of the U-phase drive coil 23 and the crossover 23a of the W-phase drive coil 23 are drawn at the lower end side of the stator core 6, and the crossover of the V-phase drive coil 23 The wire 23 a is routed at the upper end side of the stator core 6. Therefore, in the present embodiment, the crossovers 23a of the U-phase drive coil 23 and the crossovers 23a of the W-phase drive coil 23 are utilized using the protrusions 25p disposed between the outer circumferential side covering portions 25b to 25g. Driving the U-phase while preventing the disconnection of the connecting wire 23a of the V-phase drive coil 23 by using the protrusion 25p disposed between the outer circumferential side covering portions 25h to 25m. The crossover 23a of the coil 23 and the crossover 23a of the drive coil 23 for W phase can be routed at the lower end of the stator core 6, and the crossover 23a of the drive coil 23 for V phase can be routed at the upper end of the stator core 6 become. Therefore, in the present embodiment, the breakage of the connecting wire 23a of the drive coil 23 of each phase is prevented, and the contact between the drive coils 23 of each phase is prevented to prevent a short circuit between the drive coils 23 of each phase. It will be possible to

(Other embodiments)
The embodiment described above is an example of the preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  Although stator core 24 is provided with six salient pole parts 24b-24g in the form mentioned above, stator core 24 may be provided with six or more salient pole parts 24b-24g. In this case, for example, the inner peripheral surface of the stator core 24 when viewed in the vertical direction is formed in a polygonal shape corresponding to the number of salient pole portions 24b to 24g. Further, in this case, for example, the stator 6 may be manufactured using two or more core base bodies 54 each having a strip portion 54 b and a plurality of salient pole portions 24 b to 24 g. In this case, in the band-shaped portion bending step, the band-shaped portion 54b is bent at the bending portion 54a so that the band-shaped portion 54b becomes an arc-shaped outer peripheral arc portion or the like, and then bent in the band-shaped portion bending step. The stator 6 may be manufactured by combining two or more core base bodies 54 with the insulator 25 in the circumferential direction. That is, the stator core 24 may be constituted by a plurality of divided cores consisting of a curling core.

  In the embodiment described above, in the band-shaped portion bending step, the protrusion 25p is pushed inward in the radial direction by the connecting wire 23a to deform the arm 25r, and the projection 25p is moved inward in the radial direction. In addition, for example, in the band-shaped portion bending step, the protrusion 25p is pushed radially inward by the connecting wire 23a, and one or both of the two arm portions 25r connected to the protrusion 25p are broken. Also good. Further, in the band-shaped portion bending step, one or both of the two arm portions 25 r connected to the protrusion 25 p may be forcibly cut off. In this case, it is preferable that a notch is formed in the arm 25r. Even in this case, since it is possible to reduce the tension acting on the connecting wire 23a in the band-shaped portion bending step, the connecting wire on the outer peripheral side of the stator core 24 which is the curling core when viewed from the vertical direction. Even if 23a is disposed, disconnection of the crossover 23a can be prevented.

  In the embodiment described above, the protrusion 25p is formed to have a substantially triangular shape when viewed in the vertical direction, but the protrusion 25p has, for example, a semicircular shape when viewed in the vertical direction. It may be formed to have a shape or a semi-elliptical shape. Further, in the embodiment described above, the outer end of the protrusion 25p in the radial direction protrudes outward in the radial direction from the outer circumferential surface of the outer peripheral ring 24a of the stator core 24, but the outer end of the protrusion 25p in the radial direction is Alternatively, it may be disposed radially inward of the outer circumferential surface of the outer circumferential ring portion 24a.

  In the embodiment described above, the protrusions 25p and the arms 25r are disposed on the upper and lower sides of the outer periphery 24h, but the protrusions 25p and the arms 25r may be disposed only on the upper side or the lower side of the outer periphery 24h. . Further, in the embodiment described above, although the protrusion 25p and the arm 25r are integrally formed with the outer peripheral side covering portions 25b to 25m, the projection 25p and the arm portions 25r formed separately from the outer peripheral side covering portions 25b to 25m The arm 25r may be fixed to the outer circumferential covering 25b to 25m.

  In the embodiment described above, the motor 3 is used in the pump device 1, but the motor 3 may be used in devices other than the pump device 1. Moreover, in the form mentioned above, although the stator 6 is used by the motor 3, the stator 6 may be used by a generator.

3 Motor 5 Rotor 6 Stator 14 Drive Magnet 23 Drive Coil (Coil)
23a crossover 24 stator core 24a outer peripheral ring 24b-24g salient pole 24h outer peripheral 25 insulator (insulation member)
25a 1st cover (surroundings)
25b to 25g Outer circumferential cover (first outer circumferential cover)
25h to 25m Outer side cover (2nd outer cover)
25p Protrusions (1st protrusion, 2nd protrusion)
25r arm 54 core body 54a bent portion 54b strip shaped portion X1 salient pole protruding direction X2 first direction

Claims (8)

A stator having a tubular shape, a coil, an insulating member, and a stator core having a plurality of salient pole portions around which the coil is wound via the insulating member,
The stator core has an outer peripheral ring portion formed in an annular shape, and a plurality of the salient poles protruding from the outer peripheral ring portion radially inward of the stator and arranged at regular intervals in the circumferential direction of the stator. Equipped with
The outer peripheral ring portion is constituted by the same number of outer peripheral portions as the plurality of salient pole portions,
The salient pole portion is formed at the center of the outer peripheral portion in the circumferential direction of the stator,
The insulating member is disposed between a plurality of outer peripheral side covering portions covering at least a part of the end face of the outer peripheral portion in the axial direction of the stator, and the outer peripheral side covering portion in the circumferential direction of the stator A stator connected to the outer circumferential side covering portion via an elastically deformable arm portion so as to allow radial movement of the stator. The inner circumferential surface of the outer circumferential ring portion is formed so that the shape when viewed from the axial direction of the stator is a polygonal shape,
The stator according to claim 1, wherein the projection is disposed so as to overlap with a vertex of an inner peripheral surface of the outer peripheral ring having a polygonal shape when viewed in the axial direction of the stator. .   The stator according to claim 1 or 2, wherein a connecting wire forming a part of the coil is in contact with an outer end of the protrusion in a radial direction of the stator.   4. The outer end of the protrusion in the radial direction of the stator protrudes outward in the radial direction of the stator with respect to the outer peripheral surface of the outer circumferential ring portion. Stator.   The insulating member is a first outer peripheral covering portion covering at least a part of one end face of the outer peripheral portion in the axial direction of the stator as the outer peripheral side covering portion, and the other of the outer peripheral portion in the axial direction of the stator A second outer circumferential covering portion covering at least a part of the end face, and as the projection, a first projecting portion connected to the first outer circumferential covering portion via the arm portion, and the arm portion The stator according to any one of claims 1 to 4, further comprising: a second protruding portion connected to the second outer circumferential side covering portion. The projection is formed so that the shape as viewed from the axial direction of the stator is substantially triangular.
The stator according to any one of claims 1 to 5, wherein one vertex of the substantially triangular protrusion is an outer end of the protrusion in the radial direction of the stator.   A motor comprising: the stator according to any one of claims 1 to 6; and a rotor having a driving magnet and disposed on the inner peripheral side of the stator. A core body having a linear band-like portion constituted by a plurality of outer peripheral portions connected via a bending portion and a salient pole portion projecting from each of the plurality of outer peripheral portions in a direction orthogonal to the longitudinal direction of the band-like portion A plurality of outer peripheral side covering portions covering at least a part of the end face of the outer peripheral portion in the thickness direction of the core body and the outer peripheral side covering portions, and An insulating member attaching step of attaching an insulating member having a projecting portion connected to the outer circumferential side covering portion via an elastically deformable arm portion so as to be movable and a salient pole covering portion covering the salient pole portion;
A coil winding step of winding a coil around the plurality of salient pole portions through the salient pole covering portion after the insulating member attaching step;
After the coil winding step, the salient pole portion protrudes inward in the radial direction of the outer circumferential ring portion or the outer circumferential arc portion such that the strip portion becomes an outer circumferential ring portion or an outer circumferential arc portion forming an annular shape. And a band-shaped portion bending step of bending the band-shaped portion at the bending portion to
Assuming that the reverse direction of the projecting direction of the salient pole portion is a first direction,
In the coil winding step, a plurality of crossover wires forming a part of the coil are in contact with the end surface on the first direction side of the protrusion protruding toward the first direction with respect to the outer peripheral side covering portion Winding the coil around the salient pole portion of
In the band-shaped portion bending step, the connecting portion is pushed by the connecting wire toward the inner side in the radial direction of the annular outer peripheral ring portion or the arc-shaped outer peripheral arc portion, and the arm portion is deformed; The protrusion is moved inward in the radial direction of the ring portion or the outer peripheral arc portion, or the protrusion is pushed by the crossover wire inward in the radial direction of the outer peripheral ring portion or the outer peripheral arc portion. A manufacturing method of a stator characterized in that an arm is broken or the arm is broken.

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