JP2012170295A - Stator of rotary electric machine and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine, along with a method of manufacturing the same, capable of omitting a connection of in-phase coils thereby improving productivity.SOLUTION: A stator core 2 is made up of split cores 7 each of which comprises a core back part that has a shape obtained by dividing an annular shaped core back into a number of a teeth 4 in a circumferential direction and the teeth 4 extending from an inner periphery of the core back part in a radial direction. The split cores 7 are connected annularly and rotatably around a rotation shaft orthogonal to a plane surface which passes through a circumferential centre of the core back part including a shaft centre of the stator core 2. A stator coil 6 comprises six phase coils which are respectively formed of conductor wires wound around three of the teeth 4 continuously by a concentrated winding.

Description

  The present invention relates to a stator for a rotating electrical machine and a method for manufacturing the same.

  A conventional stator of a rotating electrical machine feeds a strip-shaped plate material, sequentially punches a laminated member including a back yoke piece, a tooth piece, and an extended iron piece, and caulks and laminates the punched laminated member to produce a divided core. The coil is wound around the winding drum section formed by stacking the rolled iron pieces, and the divided core around which the coil is wound is inserted so as to be annularly arranged in a cylindrical bracket having a circular outer periphery and a polygonal inner periphery. It was produced (for example, refer to Patent Document 1).

JP 2009-247169 A

  In the conventional method for manufacturing a stator of a rotating electric machine, since the coil is wound around the split core before being inserted into the bracket, high-density winding is possible. However, after the split core is inserted into the bracket, the same-phase winding is possible. It was necessary to connect the coils, and there was a problem that the productivity of the stator was reduced.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a stator for a rotating electrical machine that can omit the connection of coils in the same phase and can improve productivity, and a method for manufacturing the same.

  A stator of a rotating electrical machine according to the present invention includes a stator core in which teeth extend in a radial direction from an inner periphery or an outer periphery of an annular core back and are arranged at a predetermined pitch in the circumferential direction, and is wound around the stator core. A stator coil. The stator core includes a core back portion having a shape obtained by dividing the annular core back into the number of teeth in the circumferential direction, and one tooth extending in the radial direction from the inner periphery or the outer periphery of the core back portion. The stator coil is configured such that the divided core includes a stator core and is connected in an annular manner so as to be rotatable about a rotation axis that is orthogonal to a plane that includes the axis of the stator core and passes through the center in the circumferential direction of the core back portion. Are each composed of a plurality of phase coils formed by winding a conductor wire continuously around a plurality of teeth in concentrated winding.

According to the present invention, the split cores are connected in an annular manner so as to be rotatable around a rotation axis that is orthogonal to a plane that includes the axis of the stator core and passes through the center in the circumferential direction of the core back portion. The conductor wire can be wound in a state where the target split core is rotated around the rotation axis and the teeth are extended outward in the axial direction of the stator core. Therefore, the conductor wire can be wound around the teeth of the split core to be wound without being interfered by other split cores, and the productivity is improved.
Further, since the phase coil is formed by continuously winding a conductor wire around a plurality of teeth in a concentrated winding, there is no complicated connection work between coils of the same phase, and productivity is improved.

It is a top view explaining the structure of the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view explaining the component of the division | segmentation core in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the assembly method of the split core in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view explaining the component of the annular plate in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the assembly method of the annular plate in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the stator core in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the assembly method of the stator core in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is process drawing explaining the winding method of the concentrated winding coil in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is process drawing explaining the winding method of the concentrated winding coil in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a side view explaining the winding method of the stator coil in the stator of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part top view explaining the structure of the stator of the rotary electric machine which concerns on Embodiment 2 of this invention. It is a figure explaining the component of the split core in the stator of the rotary electric machine which concerns on Embodiment 3 of this invention. It is a top view explaining the structure of the stator of the rotary electric machine which concerns on Embodiment 3 of this invention. It is a figure explaining the component of the split core in the stator of the rotary electric machine which concerns on Embodiment 4 of this invention. It is a top view explaining the structure of the stator of the rotary electric machine which concerns on Embodiment 4 of this invention. It is a figure explaining the component of the split core in the stator of the rotary electric machine which concerns on Embodiment 5 of this invention. It is a figure explaining the component of the split core in the stator of the rotary electric machine which concerns on Embodiment 6 of this invention. It is a top view explaining the structure of the stator of the rotary electric machine which concerns on Embodiment 6 of this invention.

  Hereinafter, preferred embodiments of a stator for a rotating electrical machine according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a plan view illustrating the configuration of a stator of a rotating electrical machine according to Embodiment 1 of the present invention.

  In FIG. 1, a stator 1 includes an annular core back, teeth 4 that extend radially inward from the inner periphery of the core back and are arranged at equiangular pitches in the circumferential direction, and the inner periphery of each tooth 4. A stator core 2 having a flange 5 extending in the circumferential direction from a side end portion, and a stator coil 6 including a plurality of concentrated winding coils 6a wound around each tooth 4 of the stator core 2 in a concentrated winding. .

  The stator core 2 is configured by connecting 18 divided cores 7 divided for each tooth 4 in an annular shape using an annular plate 12. The core back portion 3 of the split core 7 is connected in an annular shape to constitute the core back of the stator core 2.

  Each of the stator coils 6 is composed of a U1-phase, V1-phase, W1-phase, U2-phase, V2-phase, and W2-phase coils that are formed by concentrated winding coils 6 a wound around three adjacent teeth 4. ing. Each phase coil is formed by winding one conductor wire around three teeth 4 in a concentrated manner. That is, each phase coil is configured by connecting three concentrated winding coils 6 a wound around three consecutive teeth 4 in series. Then, the U1-phase, V1-phase, and W1-phase coils are AC-connected, and the U2-phase, V2-phase, and W2-phase coils are AC-connected to form two sets of three-phase AC windings.

  The stator 1 manufactured in this way is assembled so as to surround, for example, a rotor in which 16 permanent magnets are arranged on the outer peripheral surface at an equiangular pitch in the circumferential direction, and is an inner rotor type 3 having 16 poles and 18 slots. It becomes a phase motor (rotary electric machine).

  First, the configuration of the split core 7 and the assembling method thereof will be described with reference to FIGS. 2 and 3. 2 is a plan view for explaining the components of the split core in the stator of the rotary electric machine according to Embodiment 1 of the present invention. FIG. 2 (a) shows the first core piece, and FIG. 2 (b). Indicates the second core piece. FIG. 3 is a perspective view for explaining a method of assembling the split core in the stator of the rotary electric machine according to Embodiment 1 of the present invention.

  The split core 7 is composed of first and second core pieces 8 and 9 produced by punching a magnetic thin plate such as a magnetic steel plate or an electromagnetic steel plate. As shown in FIG. 2A, the first core piece 8 has an arc-shaped core back piece 3a having a predetermined radial width, and a diameter from the circumferential center position of the inner peripheral edge of the core back piece 3a. It has the teeth piece 4a extended in the direction inward, and the collar piece 5a extended in the circumferential direction from the inner peripheral side edge part of the teeth piece 4a. As shown in FIG. 2B, the second core piece 9 has an engaging projection 10 extending perpendicularly to the surface of the core back piece 3a from the circumferential center position of the outer peripheral edge of the core back piece 3a. The first core piece 8 is formed in the same shape except for the protruding point.

  As shown in FIG. 3, the split core 7 is formed by laminating a predetermined number of first core pieces 8, and further laminating a second core piece 9 on the surface of the laminated body of the first core pieces 8. 8 and the 2nd core piece 9 are comprised by the core member produced by crimping and integrating. And the laminated part of the core back piece 3a comprises the core back part 3, the laminated part of the teeth piece 4a comprises the tooth 4, and the laminated part of the collar piece 5a comprises the collar 5.

  Next, the configuration of the annular plate 12 and the assembly method thereof will be described with reference to FIGS. 4 is a plan view for explaining components of the annular plate in the stator of the rotating electrical machine according to the first embodiment of the present invention, and FIG. 5 is an assembly method of the annular plate in the stator of the rotating electrical machine according to the first embodiment of the present invention. 5A is a plan view showing the first ring body, FIG. 5B is a side view showing the first ring body, and FIG. 5C is the second ring body. FIG. 5D is a side view showing the second ring body, FIG. 5E is a plan view showing the annular plate, and FIG. 5F is a side view showing the annular plate. .

  The annular plate 12 is composed of a plate piece 13 produced by punching a magnetic thin plate such as a magnetic steel plate or an electromagnetic steel plate. As shown in FIG. 4, the plate piece 13 has the same radial width as the core back piece 3a of the first core piece 8, and has a circumferential length twice as long as the circumferential length A of the core back piece 3a. Two engagement holes 14 through which the engagement protrusions 10 are inserted are formed in the outer peripheral edge portion so as to be spaced apart in the circumferential direction.

  Then, as shown in FIGS. 5A and 5B, the first ring body 15 is manufactured by arranging the plate pieces 13 in an annular shape in the circumferential direction and joining them by welding or the like. Next, as shown in FIGS. 5C and 5D, the second ring body 16 is produced by arranging the plate pieces 13 in an annular shape in the circumferential direction and joining them by welding or the like. Then, as shown in FIGS. 5E and 5F, the second ring body 16 is shifted by a distance A in the circumferential direction and superimposed on the first ring body 15, and the first and second ring bodies 15 are overlapped. , 16 are joined by welding or the like to produce the annular plate 12. In addition, the hole positions of the engagement holes 14 are coincident with each other in the superimposed first and second ring bodies 15 and 16.

  Next, the configuration of the stator core 2 and the method of assembling the stator core 2 will be described with reference to FIGS. FIG. 6 is a plan view showing a stator core in the stator of the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 7 is a perspective view for explaining a method of assembling the stator core in the stator of the rotating electrical machine according to Embodiment 1 of the present invention. is there.

  As shown in FIG. 7, the split core 7 is assembled to the annular plate 12 by inserting the engagement protrusions 10 into the respective engagement holes 14 of the annular plate 12. As a result, the split cores 7 are annularly arranged in the circumferential direction, and the stator core 2 shown in FIG. 6 is assembled. In the stator core 2 assembled in this way, the core back portion 3 of the split core 7 is connected in an annular shape to form the core back of the stator core 2, and the teeth 4 extend radially inward from the inner peripheral edge of the core back. Then, they are arranged at an equiangular pitch in the circumferential direction.

  Here, the engagement protrusion 10 extends in the axial direction from the center position in the circumferential direction of the outer peripheral edge portion of one end surface in the axial direction (stacking direction) of the core back portion 3 of the split core 7. The engagement hole 14 is formed in an inner shape having a circumferential width substantially equal to the circumferential width of the engagement protrusion 10 and a radial width wider than the thickness of the engagement protrusion 10. Therefore, the split core 7 has a rotating shaft orthogonal to a plane passing through the center in the circumferential direction of the core back portion 3 with the engaging portion of the engaging protrusion 10 and the engaging hole 14 as a fulcrum, that is, including the axis of the stator core 2. It is connected to the annular plate 12 so as to be rotatable. The axial direction of the rotating shaft is parallel to the tangential direction at the center in the circumferential direction of the core back portion 3 of a circle centered on the axis of the stator core 2.

  Next, a method for winding the stator coil 6 will be described with reference to FIGS. 8 and 9 are process diagrams for explaining a winding method of the concentrated winding coil in the stator of the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 10 is a stator of the rotary electric machine according to Embodiment 1 of the present invention. It is a side view explaining the winding method of the stator coil in.

First, the divided cores 7 are arranged on the same plane orthogonal to the axis of the stator core 2 as shown in FIG. 8A and FIG.
Next, as shown in FIG. 8B, the winding target divided core 7 is rotated with the engaging portion between the engaging protrusion 10 and the engaging hole 14 as a fulcrum. Then, as shown in FIG. 8C, the split core 7 is rotated until the teeth 4 extend outward in the axial direction from the stator core 2. In this state, the teeth 4 of the split core 7 to be wound are positioned axially outward of the stator core 2 with respect to the other split cores 7 as shown in FIG. The conductor wire can be wound around the teeth 4 while avoiding interference with the core 7.

  Next, as shown in FIGS. 9A and 10C, the conductor wire is wound a predetermined number of times around the teeth 4 of the split core 7 extending outward in the axial direction of the stator core 2, and concentrated winding coils. Wrap 6a. Then, as shown in FIG. 9B, the split core 7 around which the concentrated winding coil 6a is wound is rotated in the reverse direction with the engaging portion between the engaging protrusion 10 and the engaging hole 14 as a fulcrum. Let Then, as shown in FIG. 9C, after the divided core 7 is rotated until it is located on the same plane orthogonal to the axis of the stator core 2, as shown in FIG. 9D. The engaging protrusion 10 is bent along the teeth 4, and the divided core 7 is fixed to the annular plate 12.

  Next, as shown in FIG. 10 (d), the adjacent split core 7 to be wound next is rotated until the teeth 4 extend outward from the stator core 2 in the axial direction. Move. Then, as shown in FIG. 10 (e), the conductor wire drawn from the winding end of the concentrated winding coil 6a previously wound is wound around the tooth 4 of the split core 7 to be wound a predetermined number of times. The concentrated winding coil 6a is wound. Next, after the divided core 7 on which the concentrated winding coil 6a is wound is rotated until it is positioned on the same plane orthogonal to the axis of the stator core 2, the engagement protrusion 10 is bent along the teeth 4, The split core 7 is fixed to the annular plate 12.

  In this manner, one conductor wire is wound around three divided cores 7 that are continuous in the circumferential direction in a concentrated manner, and a phase coil in which three concentrated winding coils 6a are connected in series is wound. Then, the winding operation is similarly performed on each of the three divided cores 7 that are continuous in the circumferential direction, and a phase coil configured by connecting three concentrated winding coils 6a in series is U1. The stator 1 arranged in the order of phase, V1 phase, W1 phase, U2 phase, V2 phase, and W2 phase is manufactured.

  According to the first embodiment, the stator core 2 is formed by dividing the divided core 7 divided into the number of the teeth 4 perpendicular to a plane that includes the axis of the stator core 2 and passes through the center in the circumferential direction of the core back portion 3. It is configured to be connected to an annular plate 12 so as to be rotatable around a moving axis and arranged in an annular shape. Therefore, the conductor wire can be wound around the tooth 4 in a state in which the divided core 7 to be wound is rotated around the rotation axis and the tooth 4 is extended axially outward from the stator core 2. Thereby, since a conductor wire can be wound around the teeth 4 without being disturbed by the other divided cores 7, the conductor wire can be wound at a high density without being disturbed. As a result, in addition to increasing the mass productivity of the stator 1, copper loss can be suppressed, power consumption can be reduced, and the energy conversion efficiency of the motor can be improved.

The split core 7 is configured by laminating first and second core pieces 8 and 9 produced by punching a magnetic thin plate, and is configured in a shape in which the stator core 2 is divided into the number of teeth 4 in the circumferential direction. Therefore, the waste material portion of the magnetic thin plate from which the first and second core pieces 8 and 9 are punched is reduced, and the material removal is improved.
Since the annular plate 12 is formed by annularly connecting the plate pieces 13 produced by punching out the magnetic thin plate, the waste material portion of the magnetic thin plate from which the plate piece 13 is punched out is reduced, and the material removal is improved.

  Here, when the stator 1 is manufactured by annularly assembling the split cores 7 around which the concentrated winding coils 6a are wound, the 18 concentrated winding coils 6a wound around the teeth 4 of the split cores 7 are circumferential. Will be arranged. Therefore, in the case of configuring six phase coils of U1, V1, W1, U2, V2, and W2 phases, after the split core 7 is assembled in an annular shape, each of three adjacent concentrations It is necessary to connect the winding coil 6a in series.

  According to the first embodiment, the split core 7 is coupled to the annular plate 12 so as to be rotatable about a rotation axis that is orthogonal to a plane that includes the axis of the stator core 2 and passes through the center in the circumferential direction of the core back portion 3. Since the divided core 7 to be wound is rotated around the rotation axis, the teeth 4 are extended outward in the axial direction of the stator core 2, and the conductor wire is wound around the teeth 4. Thereafter, the winding process of rotating the divided core 7 around the rotation axis to return to the original state is continuously performed on the three adjacent divided cores 7, so that the three concentrated winding coils adjacent to each other. A phase coil in which 6a are connected in series can be formed. Therefore, there is no need to connect the concentrated winding coil 6a of the same phase, and only the phase coil is AC-connected, so that complicated connection work can be significantly reduced and the assemblability of the stator 1 can be improved.

In the first embodiment, the stator coil is composed of two sets of three-phase AC windings, but the stator coil may be composed of one set of three-phase AC windings. In this case, each of the six concentrated winding coils is connected in series by performing the winding process of the present application continuously to the adjacent six divided cores 7 or to every third divided core 7. The U-phase, V-phase, and W-phase coils may be manufactured, and the U-phase, V-phase, and W-phase coils may be AC-connected.
In the first embodiment, the stator core has 18 teeth. However, the number of teeth is not limited to 18 and is appropriately set according to the motor specifications.

In the first embodiment, the stator is described as being applied to a three-phase motor, but it goes without saying that the number of phases of the motor is not limited to three.
In the first embodiment, the annular plate is manufactured by connecting the circular arc-shaped plate pieces in an annular shape. However, if the material is not taken into consideration, the annular plate is manufactured by punching the magnetic flat plate into a ring shape. May be.

Embodiment 2. FIG.
FIG. 11 is a plan view of relevant parts for explaining the configuration of the stator of the rotating electrical machine according to the second embodiment of the present invention.

In FIG. 11, the first guide pin 17 is erected on the one surface of the annular plate 12 </ b> A on the one side in the circumferential direction with respect to the tooth 4 and close to the tooth 4. The second guide pin 18 is erected on the circumferential end of the core back portion 3 on the other side in the circumferential direction with respect to the teeth 4 on one surface of the annular plate 12A.
The second embodiment is configured in the same manner as the first embodiment except that an annular plate 12A is used instead of the annular plate 12.

  In the second embodiment, the conductor wire is wound from one side in the axial direction of the stator core 2A from a portion in the vicinity of the core back portion 3 of the tooth 4 of the split core 7 on the one side in the circumferential direction by being hooked on the first guide pin 17. After being started and wound a predetermined number of times, the stator core 2A is pulled out to one side in the axial direction. Next, the conductor wire drawn to one axial direction side of the stator core 2A is hung on the second guide pin 18 and then hung on the first guide pin 17 on the other circumferential side to split the core 7 on the other circumferential side. Winding is started from a portion in the vicinity of the core back portion 3 of the tooth 4, and after being wound a predetermined number of times, it is pulled out to one side in the axial direction of the stator core 2A. Furthermore, the conductor wire drawn to one axial direction side of the stator core 2A is hung on the second guide pin 18, and then hung on the first guide pin 17 on the other circumferential side to split the core 7 on the other circumferential side. The teeth 4 are wound around a portion near the core back portion 3, wound a predetermined number of times, then drawn out to one side in the axial direction of the stator core 2 </ b> A, and are formed by connecting three concentrated winding coils 6 a in series. A coil is formed.

  According to the second embodiment, the first guide pin 17 is erected on the one surface of the annular plate 12A on the one side in the circumferential direction with respect to the tooth 4 and close to the tooth 4, and the second guide pin 18 is erected on the circumferential end of the core back portion 3 on the other side in the circumferential direction with respect to the teeth 4 on one surface of the annular plate 12A. Therefore, when the split core 7 is rotated about the rotation axis, stress is less likely to act on the conductor wire portion (crossover portion) between the adjacent concentrated winding coils 6a, and the occurrence of disconnection is suppressed.

Embodiment 3 FIG.
12A and 12B are diagrams for explaining the components of the split core in the stator of the rotating electrical machine according to the third embodiment of the present invention. FIG. 12A is a plan view and FIG. 12B is a side view. . FIG. 13 is a plan view illustrating the configuration of the stator of the rotating electrical machine according to the third embodiment of the present invention.

  In FIG. 12, the split core 21 includes a core member 22 and a bracket 23. The core member 22 is produced by laminating a predetermined number of first core pieces 8 and caulking and integrating the laminated first core pieces 8. And the lamination | stacking part of the teeth piece 4a comprises the teeth 4, and the lamination | stacking part of the collar piece 5a comprises the collar 5. FIG.

  The bracket 23 is manufactured by bending a magnetic flat plate such as a magnetic steel plate or an electromagnetic steel plate into an L shape, and has an arcuate base portion 24 having a radial width and a circumferential width equivalent to the core back piece 3a, and a base portion 24. And a bent portion 25 bent at a right angle from the outer peripheral edge portion. Furthermore, a spherical fitting protrusion 26 is provided at the intersection of the base 24 on the end surface on one side in the circumferential direction of the bracket 23 and the bent portion 25, and a spherical fitting recess 27 is provided on the end surface on the other side in the circumferential direction of the bracket 23. The base 24 and the bent portion 25 are recessed at the intersection. The base portion 24 and the bent portion 25 are pressed against one surface and the outer peripheral surface of the laminated portion of the core back piece 3a of the core member 22, the bracket 23 is placed on the core member 22, and is fixed by welding or the like. 21 is produced. The laminated portion of the core back piece 3a and the bracket 23 constitute the core back portion 3A.

As shown in FIG. 13, the stator core 20 is configured by fitting a fitting protrusion 26 of a divided core 21 into a fitting recess 27 of an adjacent divided core 21 and connecting them in an annular shape.
Other configurations are the same as those in the first embodiment.

Since the stator core 20 configured in this way is connected by fitting the spherical fitting protrusions 26 and the spherical fitting recesses 27 of the divided cores 21 adjacent in the circumferential direction, the divided core 21 is connected to the stator core 20. Are connected so as to be rotatable around a rotation axis orthogonal to a plane passing through the center in the circumferential direction of the core back portion 3A. Therefore, also in the third embodiment, similarly to the first embodiment, the divided core 21 to be wound is rotated around the rotation axis, and the teeth 4 extend outward in the axial direction of the stator core 20. The conductor wire can be wound around the teeth 4.
Therefore, also in the third embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 4 FIG.
14A and 14B are diagrams for explaining the components of the split core in the stator of the rotating electrical machine according to the fourth embodiment of the present invention. FIG. 14A is a plan view and FIG. 14B is a side view. . FIG. 15 is a plan view illustrating the configuration of the stator of the rotating electrical machine according to the fourth embodiment of the present invention.

  In FIG. 14, the split core 31 includes a core member 32 and a bracket 33. The core member 32 is produced by laminating a predetermined number of core pieces 38 and caulking and laminating the laminated core pieces 38. The core piece 38 is formed by punching a magnetic thin plate such as a magnetic steel plate or an electromagnetic steel plate, and has an arc-shaped core back piece 38a having a predetermined radial width, and a circumferential center position of the outer peripheral edge of the core back piece 38a. It has the teeth piece 38b extended to radial direction outward, and the collar piece 38c extended in the circumferential direction from the outer peripheral side edge part of the teeth piece 38b. And the laminated part of the teeth piece 38b comprises the tooth 4, and the laminated part of the collar piece 38c comprises the collar 5.

  The bracket 33 is formed by bending a magnetic plate such as a magnetic steel plate or an electromagnetic steel plate into an L shape, and has an arcuate base 34 having a radial width and a circumferential width equivalent to the core back piece, And a bent portion 35 bent at a right angle from the inner peripheral edge portion. Further, a spherical fitting protrusion 36 is provided at the intersection of the base 34 on the end surface on one side in the circumferential direction of the bracket 33 and the bent portion 35, and a spherical fitting recess 37 is provided on the end surface on the other side in the circumferential direction of the bracket 33. The base portion 34 and the bent portion 35 are recessed at the intersection. The base portion 34 and the bent portion 35 are pressed against one surface and the inner peripheral surface of the laminated portion of the core back piece of the core member 32 so that the bracket 33 is placed on the core member 32 and fixed by welding or the like. 31 is produced. The laminated portion of the core back piece 38a and the bracket 33 constitute the core back portion 3B.

As shown in FIG. 15, the stator core 30 is configured by fitting the fitting protrusions 36 of the split core 31 into the fitting recesses 37 of the other split cores 31 and connecting them in an annular shape. The stator core 30 configured as described above is applied to an outer rotor type motor.
Other configurations are the same as those in the first embodiment.

Since the stator core 30 configured in this manner is connected by fitting the spherical fitting protrusions 36 and the spherical fitting recesses 37 of the divided cores 31 adjacent in the circumferential direction, the divided core 31 is connected to the stator core 30. Are connected so as to be rotatable about a rotation axis orthogonal to a plane passing through the center in the circumferential direction of the core back portion 3B. Therefore, also in the fourth embodiment, similarly to the first embodiment, the divided core 31 to be wound is rotated around the rotation axis, and the teeth 4 extend outward in the axial direction of the stator core 30. The conductor wire can be wound around the teeth 4.
Therefore, also in the fourth embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 5 FIG.
FIGS. 16A and 16B are diagrams for explaining the components of the split core in the stator of the rotating electrical machine according to the fifth embodiment of the present invention. FIG. 16A is a plan view and FIG. 16B is a side view. .

  In FIG. 16, the split core 40 is constituted by a core member that is produced by laminating a predetermined number of first core pieces 8 and caulking and laminating the laminated first core pieces 8. And the laminated part of the core back piece 3a comprises the core back part 3C, the laminated part of the teeth piece 4a comprises the tooth 4, and the laminated part of the collar piece 5a comprises the collar 5. The bobbin 41 is a resin molded body made of an insulating resin, and has a hollow winding body portion 42 having a rectangular cross section around which the concentrated winding coil 6 a is wound, and a flange portion 43 formed integrally at both ends of the winding body portion 42. And having. Furthermore, a spherical fitting protrusion 44 is provided on the end surface on one circumferential side of one flange portion 43, and a spherical fitting recess 45 is provided on the end surface on the other circumferential side of one flange portion 43. Yes. The bobbin 41 is attached to the split core 40 so that the teeth 4 are accommodated in the winding drum part 42. One flange portion 43 is located on the core back portion 3C side, and the fitting protrusion 44 and the fitting recess 45 are on one side in the stacking direction of the first core piece 8 with respect to a plane passing through the center in the circumferential direction of the core back portion 3C. And have a plane-symmetrical positional relationship.

In the fifth embodiment, the fitting protrusion 44 of the bobbin 41 attached to the divided core 40 is fitted into the fitting recess 45 of the bobbin 41 attached to the adjacent divided core 40 so that the divided core 40 is annularly formed. The stator core is configured by being connected.
Therefore, the split core 40 is connected so as to be rotatable about a rotation axis that is orthogonal to a plane that includes the axial center of the stator core thus configured and passes through the center in the circumferential direction of the core back portion 3C. Therefore, also in the fifth embodiment, similarly to the first embodiment, the divided core 40 to be wound is rotated around the rotation axis, and the teeth 4 are extended outward in the axial direction of the stator core. The conductor wire can be wound around the bobbin 41 attached to the tooth 4.
Therefore, also in the fifth embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 6 FIG.
FIGS. 17A and 17B are diagrams for explaining the components of the split core in the stator of the rotary electric machine according to Embodiment 6 of the present invention. FIG. 17A is a plan view and FIG. 17B is a side view. . FIG. 18 is a plan view illustrating the configuration of the stator of the rotating electrical machine according to the sixth embodiment of the present invention.

  In FIG. 17, the split core 51 is composed of a powdered iron core, and extends inward in the radial direction from the center position in the circumferential direction of the core back portion 52 having an arc shape in the planar shape and the inner peripheral edge of the core back portion 52. Teeth 53 and a flange 54 extending in the circumferential direction from the inner peripheral end of the teeth 53. Further, a spherical fitting projection 55 is provided to protrude from an outer peripheral corner of the end surface on one side in the circumferential direction of the core back portion 52, and a spherical fitting recess 56 is provided on the outer periphery of the end surface on the other circumferential side of the core back portion 52. It is recessed in the side corner.

As shown in FIG. 18, the stator core 50 is configured by fitting the fitting protrusion 55 of the split core 51 into the fitting recess 56 of the adjacent split core 51 and connecting them in an annular shape.
Other configurations are the same as those in the first embodiment.

  Since the stator core 50 configured in this way is connected by fitting the spherical fitting protrusion 55 and the spherical fitting recess 56 of the divided core 51 adjacent in the circumferential direction, the divided core 51 is connected to the stator core 50. Are connected so as to be rotatable about a rotation axis orthogonal to a plane passing through the center in the circumferential direction of the core back portion 52.

Also in the sixth embodiment, similarly to the first embodiment, the divided core 51 to be wound is rotated around the rotation axis, and the teeth 53 are extended outward in the axial direction of the stator core 50. The conductor wire can be wound around the teeth 53.
Therefore, also in the sixth embodiment, the same effect as in the first embodiment can be obtained.
According to the sixth embodiment, since the split core 51 is made of a dust core, the fitting protrusion 55 and the fitting recess 56 can be formed integrally with the split core 51. Therefore, an annular plate, a bracket and the like constituting the rotation mechanism are not necessary, and the configuration can be simplified.

  DESCRIPTION OF SYMBOLS 1 Stator, 2, 2A, 20, 30, 50 Stator core, 3, 3A, 3B, 3C, 52 Core back part, 4 teeth, 6 Stator coil, 6a Concentrated winding coil, 7, 21, 31, 40, 51 Split core , 17 First guide pin, 18 Second guide pin, 41 Bobbin.

Claims (6)

A rotating electrical machine comprising a stator core in which teeth extend radially from the inner or outer periphery of an annular core back and arranged at a predetermined pitch in the circumferential direction, and a stator coil wound around the stator core The stator of
The stator core includes a core back portion having a shape obtained by dividing the annular core back into the number of teeth in the circumferential direction, and one tooth extending in the radial direction from the inner or outer periphery of the core back portion. The split core having a shaft that includes the axis of the stator core and that is rotatable about a rotation axis that is orthogonal to a plane that passes through the center in the circumferential direction of the core back portion, and is connected in an annular shape.
The stator coil is composed of a plurality of phase coils formed by winding a conductor wire continuously around the plurality of teeth in a concentrated winding.   The stator of a rotating electrical machine according to claim 1, wherein the core back portions of the divided cores adjacent in the circumferential direction are rotatably connected.   A bobbin made of an insulating member around which the concentrated coil is wound is attached to the teeth of each of the divided cores, and the bobbins attached to the teeth of the divided cores adjacent in the circumferential direction are rotated. The stator of the rotating electrical machine according to claim 1, wherein the stator is movably connected.   A guide pin that guides the winding start side and the winding end side of the concentrated winding coil is positioned at one end surface in the axial direction of the core back portion and close to the teeth on one side in the circumferential direction with respect to the teeth. 4. The protruding portion according to claim 1, wherein the protruding portion is provided on an end side of the core back portion that is separated from the teeth on the other side in the circumferential direction with respect to the teeth. 5. A stator for rotating electrical machines.   The stator of a rotating electrical machine according to any one of claims 1 to 4, wherein the divided core is made of a dust core. A stator core in which teeth extend in a radial direction from the inner or outer periphery of an annular core back and are arranged at a predetermined pitch in the circumferential direction, and each conductor wire is continuously wound around a plurality of teeth. A stator coil composed of a plurality of phase coils formed by winding on a stator of a rotating electrical machine,
A split core having a core back portion having a shape obtained by dividing the annular core back into the number of teeth in the circumferential direction and one tooth extending in the radial direction from the inner or outer periphery of the core back portion. Manufacturing process;
A step of producing the stator core by connecting the divided core in a ring shape so as to be rotatable about a rotation axis orthogonal to a plane including the axial center of the stator core and passing through the center in the circumferential direction of the core back portion;
The divided core is rotated about the rotation axis to extend the teeth axially outward from the stator core, and a conductor wire is wound around the teeth, and then the divided core is rotated about the rotation axis. Performing a winding operation to rotate and return to the initial position continuously to the plurality of divided cores, and winding the phase coil;
A method of manufacturing a stator for a rotating electrical machine, comprising:

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