JP2011147270A - Stator of generator and driver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for improving work efficiency in manufacturing a stator core composed of plate members arranged in the circumferential direction. <P>SOLUTION: A stator core 40 is composed of a plurality of plate members 41 to 46 circumferentially arranged around an axis O. The plate members 41 to 46 are different in their radial lengths and are arranged in the order of radial lengths (in the order of longer lengths or shorter lengths) repeatedly along the circumferential direction. On the radially outer circumference side, adjacent plate members are connected to each other at their connection spots on the radially inner circumferential side or on the radially outer circumference side. These connection spots on the radially inner circumferential side or on the radially outer circumference side are formed alternately along the circumferential direction. At the connection spots, projections (41A1, 41A2, 42A, 43A1, 43A2, 44A, 45A1, 45A2, 46A) are fitted into holes (41B, 42B1, 42B2, 43B, 44B1, 44B2, 45B, 46B1, 46B2), respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a generator or a stator of a drive machine, and more particularly to a stator constituted by a plurality of plate-like members arranged around an axis in the circumferential direction.

  The generator and the electric motor have a stator and a mover arranged to be movable with respect to the stator. The stator has a stator core and a stator winding provided in the stator core. The stator core is usually composed of a plurality of laminated plate-like members having magnetism. In particular, a reciprocating generator or electric motor has a stator core composed of a plurality of plate-like members arranged (stacked) around the axis (center line of the stator) along the circumferential direction. A mover having a stator and a mover core provided with a permanent magnet is used (see Patent Document 1). In the stator core described in Patent Literature 1, a plurality of plate-like members having spacers (projections) formed on the outer peripheral side of one surface are arranged along the circumferential direction. In the stator core described in Patent Document 1, a wedge-shaped space is formed between adjacent plate-like members by spacers.

JP-A-10-322945

The stator core of the stator described in Patent Document 1 requires a holding member for temporarily holding a plurality of plate-like members arranged in the circumferential direction at the time of manufacture. For this reason, the work efficiency at the time of manufacture is not good.
The present invention has been devised in view of such points, and a holding member for temporarily holding a plurality of plate-like members arranged in the circumferential direction can be made unnecessary. Therefore, an object of the present invention is to provide a technique capable of improving the working efficiency at the time of manufacturing the stator core.

The stator of this invention has the stator core comprised by the some plate-shaped member. The plurality of plate-like members are arranged along the circumferential direction around the axis. The stator is constituted by one stator core or a plurality of stator cores. As the plate member, a plate member having magnetism, typically, an electromagnetic steel plate is used. The “axis” means the center line of the stator (stator core). In addition, the description of “arranged along the circumferential direction” refers to a configuration “arranged along the circumferential direction (arranged along the circle)” or “one along the circumferential direction”. Means a configuration (arranged along the arc).
The stator of the present invention can be used as a stator for various types of generators or drives, but is preferably used as a stator for a reciprocating generator or driver. The “drive machine” is used to include an electric motor.
In the stator according to one aspect of the invention, the plate-like members arranged adjacent to each other in the circumferential direction may be either a radially inner peripheral side connection point or a radially outer peripheral side connection point in the radially outer peripheral region. It is connected at the connecting point. Furthermore, the connection location on the radially inner periphery side and the connection location on the radially outer periphery side are provided alternately along the circumferential direction. When the plate-like members arranged adjacent to each other are connected at the connecting portion on the radially inner peripheral side, the plate-like members arranged adjacent to each other are arranged along the circumferential direction. Spacing between side edges increases. As a connection method at the connection location, various connection methods such as a connection method by caulking and a connection method by welding can be used. The stator of one invention has high rigidity.
The “radially outer peripheral region” corresponds to the outer peripheral region from the center of the radial length of the stator (stator core), preferably the outer peripheral region from the slot in which the stator winding is accommodated. To do. The “radially inner peripheral side connecting portion” and the “radially outer peripheral side connecting portion” mean connecting portions that are relatively separated in the radial direction. Intervals along the radial direction between the “radially inner peripheral connection points” and the “radial outer peripheral connection points”, the number of “radial inner peripheral connection points” and “radial outer peripheral connection points”. The position is set so that a plurality of plate-like members can be arranged around the axis line along the circumferential direction in a connected state.
Preferably, the “radially inner peripheral side connection portion” is provided at least in the axial direction central portion, and the “radial outer peripheral side connection portion” is at least one end portion in the axial direction and the other axial direction portion. At the end of the side. Thereby, when arrange | positioning a some plate-shaped member along the circumferential direction in the connected state, the stress which acts on the connection location of the radial direction outer peripheral side can be disperse | distributed.
In the stator according to another aspect of the invention, the plate-like members arranged adjacent to each other in the circumferential direction may be either a connecting point on one side in the axial direction or a connecting point on the other side in the axial direction in the region on the radially outer side. It is connected at the connection point. Furthermore, the connection location on the one side in the axial direction and the connection location on the other side in the axial direction are provided alternately along the circumferential direction. When the plate-like members arranged adjacent to each other are connected at the connecting portion on one side in the axial direction, the plate-like members arranged adjacent to each other are arranged along the circumferential direction. , The interval between the radially outer peripheral side edges widens. On the other hand, when the plate-like members arranged adjacent to each other are connected at the other connecting portion in the axial direction, if the plate-like members arranged adjacent to each other are arranged along the circumferential direction, the axial direction On one side, the distance between the radially outer peripheral side edges increases. In the stators of other inventions, the outer diameter and inner diameter can be easily changed.
The “radially outer peripheral region” corresponds to the outer peripheral region from the center of the radial length of the stator (stator core), preferably the outer peripheral region from the slot in which the stator winding is accommodated. To do. “One side in the axial direction” corresponds to a region on one side from the center of the length in the axial direction of the stator (stator core), preferably in the vicinity of the end on one side including the edge on one side. Further, “the other side in the axial direction” corresponds to the region on the other side from the center of the axial length of the stator (stator core), preferably the region near the end on the other side including the edge on the other side. . “Axial direction one side connection location” and “Axial direction other side connection location” mean connection locations that are relatively distant from each other along the axial direction. Spacing along the axial direction between the “connecting points on one side in the axial direction” and the “connecting points on the other side in the axial direction”, the number and positions of the “connecting points on the one side in the axial direction” and the “connecting points on the other side in the axial direction” Is set so that a plurality of plate-like members can be arranged around the axis along the circumferential direction in a connected state.
Depending on the thickness of the plate member, the radial length of the stator, and the like, a stator having a desired dimension may not be formed using plate members having the same radial length.
Another embodiment of the stator of one invention and another invention is constituted by a plurality of plate-like members having different radial lengths. In the stator according to the present embodiment, the plurality of plate-like members are repeatedly arranged along the circumferential direction in one of the longest or shortest radial lengths. Further, the plate-like members arranged adjacent to each other in the circumferential direction are arranged so as to overlap each other at a position away from the radially inner edge of the plate-like member having the longest radial length at the radially outer side. Yes. In the case where the radial length is repeatedly arranged in order from the longest, the radial length after the longest radial direction is arranged from the longest radial plate to the longest radial plate. The longest plate-like member is arranged. In the case where the radial length is repeatedly arranged in the short order, the radial length is arranged after the plate-like member having the shortest radial length is arranged in order from the plate-like member having the longest radial length. The shortest plate-like member is arranged.
As a plurality of plate-like members having different radial lengths, for example, two types of plate-like members having different radial lengths can be used, or three types of plate-like members having different radial lengths are used. be able to. A first plate member having a radial length R1, a second plate member having a radial length R2 (<R1), and three types of plates having a radial length R3 (<R2) When the shaped member is used, a cutout portion having the same shape (dimension) is preferably formed along the axial direction in the first plate-like member and the second plate-like member. The notch forms a slot that accommodates the stator winding. And the 2nd plate-shaped member is arrange | positioned in the position where the notch part of a 2nd plate-shaped member opposes the notch part of a 1st plate-shaped member. In addition, the third plate-like member has a first plate-like member and a second plate-like shape in a region on the outer peripheral side in the radial direction from the notches formed in the first plate-like member and the second plate-like member. It arrange | positions so that it may overlap with a member. Note that the shape and arrangement position of the third plate member are set so as not to obstruct the slot formed by the cutout portions of the first plate member and the second plate member.
As a connecting method for connecting the plate-like members arranged adjacent to each other in the circumferential direction, it is preferable to use a connecting method for connecting using a protrusion and a hole into which the protrusion is fitted. Typically, a caulking connection method is used as a connection method using the protrusion and the hole.
It is preferable that the edge part of the radial direction outer peripheral side is arrange | equalized as the plate-shaped member arrange | positioned adjacent to the circumferential direction and connected by the connection location.
The present invention can be configured as a drive machine or a generator using the above-described stator.

  The present invention has a stator core in which a plurality of plate-like members are arranged along the circumferential direction without using a holding member for temporarily holding the plurality of plate-like members arranged in the circumferential direction. A stator, and further, a drive or a generator using such a stator can be manufactured. Thereby, the working efficiency at the time of manufacture can be improved.

It is sectional drawing of embodiment which comprised this invention as an electric power generating apparatus. It is a figure explaining one Embodiment of the connection method of an adjacent plate-shaped member. In FIG. 2, it is the figure seen from the direction of arrow III. In FIG. 2, it is the figure seen from the direction of arrow IV. It is a perspective view of the stator core comprised by connecting the adjacent plate-shaped member with the connection method of one Embodiment. In FIG. 5, it is the figure seen from the direction of arrow VI. It is a figure explaining other embodiment of the connection method of the adjacent plate-shaped member. In FIG. 7, it is the figure seen from the direction of arrow VIII. In FIG. 7, it is the figure seen from the direction of arrow IX. It is a perspective view of the stator core comprised by connecting the adjacent plate-shaped member with the connection method of other embodiment. In FIG. 10, it is the figure seen from the direction of arrow XI.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an embodiment in which the present invention is configured as a reciprocating generator 10. In this specification, the description “same” is used as including the concept of “substantially equal”. Further, the “axial direction” means the direction of the center line O of the stator core (the vertical direction in FIGS. 1 and 2), and the “radial direction” means the direction orthogonal to the center line O of the stator core (FIG. 1 and the right and left direction in FIG. 2).
The reciprocating generator 10 according to the present embodiment includes a stator 20 and a mover 80.
The stator 20 is attached to the base member 11. The stator 20 has a stator core 30 and a stator winding 60 provided in a slot 31 of the stator core 30. The stator core 30 includes a first stator core 40 disposed on one axial side (for example, the upper side in FIG. 1) and a second stator core disposed on the other axial side (for example, the lower side in FIG. 1). The stator core 50 is divided into two. As seen in the cross section along the axial direction shown in FIG. 1, the stator core 30 has a C-shape, the first stator core 40 has an inverted U-shape, The second stator core 50 has a U shape. The stator core 30 (the first stator core 40 and the second stator core 50) is composed of a plurality of plate-like members arranged around the axis O along the circumferential direction. The stator core 30 (the first stator core 40 and the second stator core 50) can also be said to be a laminate in which a plurality of plate-like members are laminated around the axis O along the circumferential direction. As the plate-like members constituting the stator core 30 (the first stator core 40 and the second stator core 50), magnetic plate-like members are used. In the present embodiment, an electromagnetic steel plate is used.
The mover 80 has a shaft 70, a mover core 81, and a permanent magnet 90. The shaft 70 is attached to the bearing 12 provided on the base member 11 so as to be movable along the axis O. The mover core 81 is fixed to the shaft 70 and has a permanent magnet 90 attached thereto. The permanent magnet 90 is disposed at a location facing the stator core 20 (slot 31 in which the stator winding 60 is accommodated). The permanent magnet 90 is magnetized in a direction (radial direction) orthogonal to the axis O. Thereby, when the permanent magnet 90 reciprocates in the axial direction, an electromotive force is generated in the stator winding 60.

  Next, the configuration of the stator core 30 will be described. In the present embodiment, the stator core 30 is divided into two parts, a first stator core 40 and a second stator core 50. The first stator core 40 and the second stator core 50 are symmetrical with respect to the cross-sectional shape along the axis O. For this reason, below, the structure of the 1st stator core 40 is demonstrated with reference to FIGS. FIG. 2 shows a method of connecting the plate-like members constituting the first stator core 40 and the plate-like members arranged adjacent to each other. FIG. 3 is a view seen from the direction of arrow III in FIG. FIG. 4 is a view seen from the direction of arrow IV in FIG.

The first fixed core 40 is composed of a plurality of plate-like members having different radial lengths. As shown in FIGS. 2 and 3, the plate-like member has a plate-like member 41 (44) having a radial length R1 and a plate-like member having a radial length R2 (<R1). Three types of plate-like members are used: the member 42 (45) and the plate-like member 43 (46) whose radial length is R3 (<R2). 2 and 4, the left-right direction is the radial direction, the left side is the radially outer peripheral side, and the right side is the radial inner peripheral side.
The plate-like member 41 (44) includes an edge portion (hereinafter referred to as “radial outer periphery side edge portion”) 41a (44a) disposed on the radially outer peripheral side, and an edge portion (hereinafter referred to as “radial outer periphery side edge”). And 41b (44b). Further, edges 41c (44c) and 41e (44e) extending in parallel with the radially inner peripheral edge 41b (44b) and a direction orthogonal to the radially inner peripheral edge 41b (44b) are extended. It has an edge 41d (44d). Moreover, it has the edge parts 41f (44f) and 41g (44g). The notches 41h (44h) are formed by the edges 41c to 41e (44c to 44d). The notch 41h (44h) is formed in parallel with the radially inner peripheral side edge 41b (44b), and forms a slot 31 that accommodates the stator winding 60.
The plate-like member 42 (45) has a radially outer peripheral edge 42a (45a) and a radially inner peripheral edge 42b (45b). Moreover, it has the edge part 42c (45c), 42d (45d), 42e (45e), 42f (45f), and 42g (45g). A notch having the same shape (dimension) as the notch 41h (44h) of the plate member 41 (44) by the edges 42c (45c), 42d (45d), and 42e (45e) of the plate member 42 (45). 42h (45h) is formed. The notch portion 42h (45h) is formed in parallel with the radially inner peripheral edge portion 42b (45b), and forms a slot 31 that accommodates the stator winding 60.
The plate-like member 43 (46) has a radially outer peripheral edge 43a (46a) and a radially inner peripheral edge 43b (46b). Moreover, it has the edge part 43c (46c).
In this Embodiment, as FIG. 4 shows, the shape of the part enclosed by the radial direction outer peripheral side edge parts 41a-46a, the edge parts 41c-46c, and the edge parts 41f-46f of the plate-shaped members 41-46. (Dimensions) are the same. That is, the lengths of the radially outer peripheral edges 41a to 46a are the same, the lengths of the edges 41c to 46c are the same, and the lengths of the edges 41f to 46f are the same. Further, in order to form the opening of the slot 31, the edge portions 41f to 46f are separated from the edge portions 41g, 42g, 44g, and 45g along the direction of the axis O (the radially inner peripheral edge portions 41b and 44b). Formed in position.
The shapes of the notches 41h (44h) and 42h (45h) are not limited to the shapes shown in FIGS. The shapes of the edges 41c (44c), 41d (44d), 41e (44e), 42c (45c), 42d (45d), 42e (45e), 43c (46c) are notches 41h (44h), 42h (45h). ) Depending on the shape. The shape of the plate-like members 43 and 46 is set so that the outer shape of the slot formed by the notches 41h, 42h, 44h, and 45h is not hindered.

  In the present embodiment, the plate member 41 (44) corresponds to the “first plate member” of the present invention, and the plate member 42 (45) or the plate member 43 (46) of the present invention is the “first plate member”. 2 plate-like member ". Alternatively, the plate member 41 (44) corresponds to the “first plate member” of the present invention, and the plate member 42 (45) corresponds to the “second plate member” of the present invention. The member 43 (46) corresponds to the “third plate-like member” of the present invention.

Next, a method for forming the first stator core 40 will be described.
First, a laminated body in which the plate-like members 41 to 46 are laminated is formed.
The plate-like members 41 to 46 are sequentially stacked after being punched out by a press machine. For example, as shown in FIG. 2, a plate-like member 41 having a radial length R1, a plate-like member 42 having a radial length R2 (<R1), and a radial length R3 from below to above. A plate-like member 43 having (<R2), a plate-like member 44 having a radial length R1, a plate-like member 45 having a radial length R2 (<R1), and a radial length R3 (<R2). Lamination is repeated in the order of the plate-like members 46 (in the order of increasing radial length). Of course, the layers may be repeatedly laminated in the reverse order (in the order of decreasing radial length).
At this time, as shown in FIG. 4, the plate-like members 41 to 46 are laminated so that the radially outer peripheral side edges 41 a to 46 a are aligned. That is, it laminates | stacks so that the part of an outer peripheral side may overlap with the edge parts 41c-46c (notch part) of the plate-shaped members 41-46.

Further, the plate-like members 41 to 46 are formed with protrusions and holes for connecting with adjacent plate-like members by caulking in a region on the radially outer peripheral side. The protrusion and the hole are preferably formed at the time of punching. In the present embodiment, the protrusions and holes of the plate-like members 41 to 46 are connected to the adjacent plate-like members on the radially outer peripheral side and on the radially inner peripheral side along the stacking direction. It is formed to be performed alternately.
“A radially outer region” refers to the radial length of the stator core 30 (the first stator core 40 and the second stator core 50) (= the plate-like member 41 having the longest radial length) 44 corresponds to the region on the outer peripheral side (see FIG. 5) from the center Q of the radial direction length R1). Suitably, the area | region (area | region where the plate-shaped members 41-46 are piled up) from the edge parts 41c-46c of the plate-shaped members 41-46 respond | corresponds.

In FIG. 2, the plate-like member 41 has a concave portion 41 </ b> B for connecting to a plate-like member 46 laminated on the lower side at a connecting portion on the radially inner peripheral side, and a plate-like member 42 laminated on the upper side in the radial direction. Protrusions 41A1 and 41A2 are formed for connection at a connection portion on the outer peripheral side. The protrusions 41A1 and 41A2 are formed on one side in the axial direction (upper side in FIG. 2) and the other side in the axial direction (lower side in FIG. 2), respectively. The recess 41B is formed in the center in the axial direction.
Note that “one axial direction side” is one end, preferably one end including an edge on one side, from the center P of the axial length L of the first stator core 40 (see FIG. 5). The area near the part corresponds. In addition, “the other side in the axial direction” is a region near the other side, preferably the end on the other side including the edge on the other side, from the center P of the axial length L of the first stator core 40. Corresponds. Further, the “axial center portion” corresponds to a region in the vicinity of the center P of the axial length L of the first stator core 40.
The plate-like member 42 has concave portions 42B1 and 42B2 for connecting to the plate-like member 41 laminated on the lower side at the connecting portion on the radially outer peripheral side, and the plate-like member 43 laminated on the radial inner peripheral side. A protrusion 42A is formed for connection at the connection point. The recesses 42B1 and 42B2 are formed at locations facing the protrusions 41A1 and 41A2 of the plate-like member 41 on one axial side (upper side in FIG. 2) and the other axial side (lower side in FIG. 2), respectively. .
The plate-like member 43 is connected to the plate-like member 42 laminated on the lower side at the connecting portion on the radially inner peripheral side, and to the plate-like member 44 laminated on the upper side in the radial direction. Protrusions 43A1 and 43A2 for connection at the locations are formed. The protrusions 43A1 and 43A2 are formed on one side in the axial direction and the other side in the axial direction, respectively. The concave portion 43B is formed at a position facing the protruding portion 42A of the plate-like member 42 at the central portion in the axial direction.

Similarly, the plate-like member 44 has recesses 44B1 and 44B2 for connecting to the plate-like member 43 stacked on the lower side at the connecting portion on the outer peripheral side in the radial direction, and the plate-like member 45 stacked on the upper side and the diameter. A protrusion 44A is formed for connection at a connecting portion on the inner side in the direction. The recesses 44B1 and 44B2 are formed at locations facing the protrusions 43A1 and 43A2 of the plate-like member 43, respectively.
The plate-like member 45 is connected to the plate-like member 44 laminated on the lower side at a connecting portion on the radially inner peripheral side, and to the plate-like member 46 laminated on the upper side in the radial direction. Protrusions 45A1 and 45A2 for connection at the locations are formed. The recess 45 </ b> B is formed at a location facing the protrusion 44 </ b> A of the plate-like member 44.
The plate-like member 46 has recesses 46B1 and 46B2 for connecting to the plate-like member 45 laminated on the lower side at the connecting portion on the radially outer peripheral side, and the plate-like member 41 laminated on the radial inner peripheral side. A protrusion 46A for connection at the connection point is formed. The recesses 46B1 and 46B2 are formed at locations facing the protrusions 45A1 and 45A2 of the plate-like member 45, respectively.
FIG. 3 shows a state in which the plate-like members 41 to 46 are laminated and are connected at a connecting portion on the radially outer peripheral side or a connecting portion on the radially inner peripheral side. FIG. 3 is a diagram viewed from one side in the axial direction (upper side in FIG. 2).

  As described above, the plate-like members 41 to 46 are sequentially laminated in the vertical direction, and the adjacent plate-like members 41 to 46 are connected along the lamination direction on the radially outer peripheral side connecting portion and the radially inner peripheral side. Laminated bodies that are alternately connected at the connecting points are formed. In the present embodiment, three types of plate-like members having different radial lengths are used, and a connecting portion on the radially outer peripheral side and a connecting portion on the radially inner peripheral side are alternately provided in the stacking direction. The stacked body of the group M1 and the stacked body of the second group M2 are alternately stacked.

Next, the 1st stator core 40 is formed using the laminated body by which the plate-shaped members 41-46 are laminated | stacked and connected. For example, in the state where the plate-like members 41 to 46 are laminated and connected as shown in FIG. 3, as shown in FIG. 6, the plate-like members 41 to 41 constituting the laminate are shown. 46, force is applied so that the radially inner peripheral side edges 41b, 44b of the plate-like members 41, 44 having the longest radial length abut on the side surface side. At this time, the stress which expands the space | interval between adjacent radial direction outer peripheral edge parts acts on the radial direction outer peripheral side edge parts 41a-46a of the plate-shaped members 41-46. In the present embodiment, the adjacent plate-like members are connected on the radially outer peripheral side and on the radially inner peripheral side alternately in the stacking direction. The space | interval between the radial direction outer peripheral side edge parts of the plate-shaped member connected by is widened. In the present embodiment, as shown in FIG. 6, the interval between the radially outer peripheral edges of the plate members 42 and 43 connected on the radially inner periphery side, the plate members 44 and 45. The distance between the outer peripheral edges of the radial direction and the distance between the outer peripheral edges of the plate-like members 46 and 41 are increased. Thereby, as shown in FIG. 5, the plate-like members 41 to 46 are arranged around the axis O along the circumferential direction.
In the present embodiment, as shown in FIG. 5, the first stator core 40 has an outer radius of R, a radial length of R1 (the radial length of the plate-like members 41, 44), It is formed as a cylindrical laminate having an axial length L.
When the first stator core 40 is formed, the first method is performed by the above method using a laminate in which an appropriate number of plate-like members 41 to 46 are laminated in the vertical direction. It is preferable to use a method in which a part of the blocks of the stator core 40 is formed and the first stator core 40 is formed by combining a plurality of such blocks. Of course, a method of forming the first stator core 40 by a single process can also be used.

  In the same manner, the second stator core 50 is formed. The first stator core 40 and the second stator core 50 are arranged along the axis O direction so that the respective edge portions 41g, 42g, 44g, and 45g are in contact with each other. Form. Note that the stator winding 90 is preferably housed in the slot 31 before the first stator core 40 and the second stator core 50 are arranged along the direction of the axis O.

As shown in FIG. 5, the first stator core 40 of the present embodiment includes a plurality of plate-like members 41 to 46 having different lengths in the radial direction along the circumferential direction around the axis O. Are arranged repeatedly in the order of the length in the radial direction. In FIG. 5, a plate-like member 41 having a radial length R <b> 1, a plate-like member 42 having a radial length R <b> 2 (<R <b> 1), and a radial length R <b> 3 (around the axis O) in the counterclockwise direction. Plate member 43 having <R2), plate member 44 having radial length R1, plate member 45 having radial length R2 (<R1), plate having radial length R3 (<R2) The members 46 are repeatedly arranged in the order (in the order of increasing radial length). In FIG. 5, a plate-like member 46 having a radial length R3, a plate-like member 45 having a radial length R2 (> R3), and a radial length R1 around the axis O in the clockwise direction. A plate-like member 44 having (> R2), a plate-like member 43 having a radial length R3, a plate-like member 42 having a radial length R2 (> R3), and a radial length R1 (> R2). The plate-like members 41 are repeatedly arranged in the order (in the order of decreasing radial length). In the 1st stator core 40, the plate-shaped members 41-46 should just be arrange | positioned in order of the length of radial direction along the circumferential direction, and it does not ask | require whether it is clockwise or counterclockwise. . The number of plate-like members constituting the first stator core 40 is preferably a multiple of the number of types of plate-like members having different lengths in the radial direction, but may not be a multiple.
Moreover, the plate-shaped members 41-46 are arrange | positioned so that radial direction outer peripheral side edge part 41a-46a may align.
Further, the plate-like members 41 to 46 are arranged so as to overlap on the outer peripheral side in the radial direction from the notches 41h, 42h, 44h, 45h forming the slots 31 in which the stator windings 60 are accommodated.
In addition, the plate-like members arranged adjacent to each other in the circumferential direction among the plate-like members 41 to 46 are connected in the radially outer peripheral region between the radially outer peripheral connected portion and the radially inner peripheral connected portion. It is connected at either one of the connection points. Furthermore, the connection on the radially outer peripheral side and the connection on the radially inner peripheral side of the adjacent plate-like members are alternately performed along the circumferential direction. In the present embodiment, the radial outer peripheral side connection and the radial inner peripheral side connection of the adjacent plate-like members are notched portions 41h, 42h, 44h that form the slots 31 in which the stator windings 60 are accommodated. It is performed in the region on the radially outer side from 45h.
Thus, the first stator core 40 of the present embodiment needs to use a holding member for temporarily holding a plurality of plate-like members arranged in the circumferential direction as in the conventional example. Absent. Therefore, the working efficiency at the time of manufacturing the stator core can be increased. Further, the plates are arranged adjacent to each other in the circumferential direction because they are connected in a region on the radially outer side from the notches 41h, 42h, 44h, and 45h forming the slot 31 in which the stator winding 60 is accommodated. The interval between the radial outer peripheral side edges of the shaped member can be narrowed, and the lamination density of the first stator core 40 is improved. Thereby, concentration of magnetic flux is prevented and an increase in iron loss due to concentration of magnetic flux can be suppressed.
Moreover, the plate-shaped member arrange | positioned adjacent to the circumferential direction must be connected by the connection place of the radial direction outer peripheral side and the connection place of a radial direction inner periphery side which are provided alternately along the circumferential direction. Thus, the plate-like members are connected with high strength. That is, the deformation of each plate-like member is suppressed. Thereby, the rigidity of the 1st stator core 40 can be improved. When the rigidity of the first stator core 40 is increased, variations in dimensional accuracy due to the twist (particularly, the twist in the axial direction) of the first stator core 40 can be prevented, and the quality can be improved. Furthermore, the handling at the time of manufacture of the 1st stator core 40 becomes easy.

In the above embodiment, the plate-like members adjacent in the circumferential direction are alternately connected along the circumferential direction in the radial outer peripheral region, with the connection on the circumferential outer periphery side and the connection on the circumferential inner peripheral side. However, the connection method of the plate-shaped members adjacent in the circumferential direction is not limited to this. Another embodiment in which plate members adjacent in the circumferential direction are connected by different methods will be described below.
Hereinafter, a method of forming the first stator core 140 will be described with reference to FIGS.
In the present embodiment, a plate-like member 141 (144) having a radial length R1 and a plate-like member 142 (<R1) having a radial length R2 (<R1) are the same as the plate-like members 41 to 46. 145) and a plate-like member 143 (146) having a radial length R3 (<R2) are used.
The plate-like members 141 to 146 have the same shape as the plate-like members 41 to 46, and only the connection method is different. Therefore, below, only the connection method of the plate-shaped members 141-146 is demonstrated.
In the present embodiment, the plate member 141 (144) corresponds to the “first plate member” of the present invention, and the plate member 142 (145) or the plate member 143 (146) of the present invention is the “first plate member”. 2 plate-like member ". Alternatively, the plate member 141 (144) corresponds to the “first plate member” of the present invention, and the plate member 142 (145) corresponds to the “second plate member” of the present invention. The member 143 (146) corresponds to the “third plate-like member” of the present invention.

A method for forming the first stator core 140 will be described.
First, a laminate in which the plate members 141 to 146 are laminated is formed.
The plate members 141 to 146 are sequentially stacked after being punched out by a press machine. For example, as shown in FIG. 7, from bottom to top, a plate-like member 141 having a radial length R1, a plate-like member 142 having a radial length R2 (<R1), and a radial length R3. A plate-like member 143 having (<R2), a plate-like member 144 having a radial length R1, a plate-like member 145 having a radial length R2 (<R1), and a radial length R3 (<R2). The plate-like members 146 are stacked in the order (in the order of increasing radial length). Moreover, it laminates | stacks so that radial direction outer peripheral side edge part 141a-146a may align. That is, it laminates | stacks so that it may overlap on the outer peripheral side rather than the edge parts 141c-146c (notch part 141h, 142h, 144h, 145h) of the plate-shaped members 141-146.
Note that, similarly to the first stator core 40, the layers may be repeatedly stacked in the order of decreasing radial length.

Further, the plate-like members 141 to 146 are formed with protrusions and holes for connecting by caulking with plate-like members arranged adjacent to each other in the circumferential direction in the region on the radially outer side. In the present embodiment, the protrusions and holes of the plate-like members 141 to 146 are connected in the stacking direction on the one side in the axial direction and on the other side in the axial direction of the plate-like members arranged adjacent to each other. Are formed alternately.
In FIG. 7, the plate-like member 141 is laminated above the plate-like member 146 that is laminated below and a concave portion 141 </ b> B that is coupled at a coupling point on one axial side (for example, the upper side in FIG. 7). A protrusion 141 </ b> A is formed for connection with the plate-like member 142 at a connection portion on the other side in the axial direction (for example, the lower side in FIG. 7).
The “one axial direction side” corresponds to a region on the one side from the center of the axial length of the first stator core 140, preferably in the vicinity of the end on one side including the edge on one side. To do. Further, “the other side in the axial direction” corresponds to a region on the other side from the center of the axial length of the first stator core 140, preferably in the vicinity of the end on the other side including the edge on the other side. To do. Further, the “axial center portion” corresponds to a region near the center of the axial length of the first stator core 140.
The plate-like member 142 includes a plate-like member 141 stacked below and a concave portion 142B for connecting at a connecting portion on the other side in the axial direction (for example, the lower side in FIG. 7), and a plate-like member stacked above. A protrusion 142A is formed to be connected to a connecting portion on one side (for example, the upper side in FIG. 7) in the axial direction. The recess 142B is formed at a location facing the protrusion 141A of the plate-like member 141.
The plate-like member 143 includes a concave portion 143B for connecting to the plate-like member 142 stacked on the lower side at a connection portion on one axial direction, and a connection portion on the other side of the plate-shaped member 144 stacked on the upper side in the axial direction. A protrusion 143A is formed for connection. The recess 143B is formed at a location facing the protrusion 142A of the plate-like member 142.

Similarly, the plate-like member 144 has a concave portion 144B for connecting to the plate-like member 143 laminated on the lower side at a connecting portion on the other side in the axial direction, and a plate-like member 145 laminated on the upper side and one in the axial direction. A protrusion 144A is formed for connection at the connection portion on the side. The recess 144B is formed at a location facing the protrusion 143A of the plate-like member 143.
The plate-like member 145 has a concave portion 145B for connecting to the plate-like member 144 laminated on the lower side at a connecting portion on one axial side, and a plate-like member 146 laminated on the upper side to a connecting portion on the other axial side. A projection 145A for connection is formed. The recess 145B is formed at a location facing the protrusion 144A of the plate-like member 144.
The plate-like member 146 has a concave portion 146B for connecting to the plate-like member 145 stacked on the lower side at the connection point on the other side in the axial direction, and a plate-like member 141 stacked on the upper side and a connection point on the one side in the axial direction. A protrusion 146A for connection is formed. The recess 146B is formed at a location facing the protrusion 145A of the plate-like member 145.
FIG. 8 shows a state in which the plate-like members 141 to 146 are stacked and connected at a connecting portion on one side in the axial direction or a connecting portion on the other side in the axial direction. 8 is a view of FIG. 7 as seen from the direction of arrow VIII (left side of FIG. 7).

  As described above, the plate-like members 141 to 146 are sequentially laminated in the vertical direction, and the adjacent plate-like members 141 to 146 are connected in the lamination direction on the one side in the axial direction and on the other side in the axial direction. Laminated bodies that are alternately connected at the locations are formed. In the present embodiment, three types of plate-like members having different lengths in the radial direction are used, and the connecting portion on one side in the axial direction and the connecting portion on the other side in the axial direction are alternately provided in the stacking direction. The stacked body of the group M1 and the stacked body of the second group M2 are alternately stacked.

Next, the 1st stator core 140 is formed using the laminated body by which the plate-shaped members 141-146 are laminated | stacked and connected. For example, in the state where the plate-like members 141 to 146 are stacked and connected as shown in FIG. 8, the radial length is the largest among the plate-like members 141 to 146 constituting the laminate. A force is applied so that the radially inner peripheral edges 141b and 144b of the long plate-like members 141 and 144 abut on the side surfaces (see FIG. 11). At this time, the stress which expands the space | interval between adjacent radial direction outer peripheral edge parts acts on the radial direction outer peripheral side edge parts 141a-146a of the plate-shaped members 141-146. In the present embodiment, the adjacent plate-like members 141 to 146 have the connecting portion on one side in the axial direction and the connecting portion on the other side in the axial direction provided alternately in the stacking direction. On the side where the connection portion is not provided, the interval between the radially outer peripheral side edges is increased. In the present embodiment, as shown in FIG. 11, the plate-like members 141 and 142, the plate-like members 143 and 144, and the plate-like members 145 and 146 are connected to one side in the axial direction (the upper side in FIG. 11). Since no place is provided, the interval on one side in the axial direction is widened. On the other hand, the plate-like members 142 and 143, the plate-like members 144 and 145, and the plate-like members 146 and 141 are not provided with a connecting portion on the other side in the axial direction (the lower side in FIG. 11). Spacing increases. That is, when viewed from the radially outer side, the radially outer peripheral edges of adjacent plate-like members are alternately arranged in a V shape and an inverted V shape along the circumferential direction. In this case, the spacing between the radially outer peripheral edges of the adjacent plate-like members is equally widened alternately on the one axial side and the other axial side along the circumferential direction. Accordingly, as illustrated in FIG. 10, the plate-like members 141 to 146 are arranged around the axis O along the circumferential direction.
In the present embodiment, as shown in FIG. 10, the first stator core 140 has an outer peripheral radius R, a radial length R1 (the radial length of the plate-like members 41, 44), It is formed as a cylindrical laminate having an axial length L.
When the first stator core 140 is formed, an appropriate number of plate-like members 141 to 146 are stacked in the vertical direction, and adjacent plate-like members are connected to the connecting portion on one side in the axial direction and the axial direction. A part of the blocks of the first stator core 140 is formed by the above-described method using the laminates that are alternately connected at the other side connection points, and the first stator core 140 is combined by combining a plurality of blocks. It is preferred to use the method of forming.

As shown in FIG. 10, the first stator core 140 according to the present embodiment includes a plurality of plate-like members 141 to 146 having different radial lengths along the circumferential direction around the axis O. Are arranged repeatedly in the order of the length in the radial direction. In FIG. 10, they are repeatedly arranged around the axis O in the order of increasing radial length along the counterclockwise direction. Further, in FIG. 10, they are repeatedly arranged around the axis O in the order of decreasing radial length along the clockwise direction.
Moreover, the plate-shaped members 141-146 are arrange | positioned so that radial direction outer peripheral side edge parts 141a-146a may align.
Further, the plate-like members 141 to 146 are arranged so as to overlap each other at a location further away from the radially inner peripheral side edges 141b and 144b of the plate-like members 141 and 144 having the longest radial length. . In the present embodiment, the plate-like members 141 to 146 are arranged so as to overlap with the notches 141h, 142h, 144h, 145h forming the slot 31 in which the stator winding 60 is accommodated on the radially outer side. .
Moreover, the plate-shaped member arrange | positioned adjacent to the circumferential direction among the plate-shaped members 141-146 is either one of the connection location of the axial direction one side, and the connection location of the other axial direction side in the radial direction outer peripheral side. It is connected at the connecting point. Furthermore, the connection of the axial direction one side and the connection of the other axial direction of the plate-shaped member arrange | positioned adjacently are performed alternately along the circumferential direction. In the present embodiment, the connection on one side in the axial direction and the connection on the other side in the axial direction of the plate-shaped members arranged adjacent to each other are a notch 141 h that forms the slot 31 in which the stator winding 60 is accommodated, 142h, 144h, and 145h are performed on the radially outer side.
Accordingly, the first stator core 140 of the present embodiment needs to use a holding member for temporarily holding a plurality of plate-like members arranged in the circumferential direction as in the conventional example. Absent. Therefore, the working efficiency at the time of manufacturing the stator core can be increased. Moreover, the space | interval between the radial direction outer peripheral side edge parts of the plate-shaped member arrange | positioned adjacent to the circumferential direction opens equally, and does not open large. Therefore, the stacking density of the first stator core 140 is improved, the concentration of magnetic flux is prevented, and an increase in iron loss due to the concentration of magnetic flux can be suppressed.
In addition, the plate-like members arranged adjacent to each other in the circumferential direction are connected at the connecting point on one side in the axial direction and the connecting point on the other side in the axial direction provided alternately along the circumferential direction. The interval between the radially outer peripheral side edges of the adjacent plate-like members on the side where the connecting portion is not provided can be changed over a wide range. Thereby, the diameter (inner diameter) on the radially inner circumference side and the diameter (outer diameter) on the radially outer circumference side of the first stator core 140 constituted by a plurality of plate-like members arranged alternately along the circumferential direction. Can be easily changed.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions can be made without departing from the scope of the present invention.
Although a stator core having a C-shaped cross-section was used, stator cores having various cross-sectional shapes can be used as the stator core. Further, the cross-sectional shapes of the first stator core and the second stator core (the shapes of the plate-like members constituting the first stator core and the second stator core) depend on the cross-sectional shape of the stator. As appropriate.
Further, the stator core can be constituted by one stator core, or can be constituted by three or more stator cores.
Moreover, although the stator core was comprised by the plate-shaped member arrange | positioned along the circumferential direction whole periphery around the axis line, comprising a stator core by the plate-shaped member arrange | positioned at a part along the circumferential direction You can also.
The stator core is composed of three types of plate-like members having different radial lengths. However, the stator core has a plate-like member having the same radial length (one type of plate-like member) and different radial lengths. It can also be constituted by two or four or more types of plate-like members. The number of types of plate members having different radial lengths and the radial length of each plate member are selected according to the thickness of the plate member, the radial length of the stator core, and the like.
As a method of connecting the plate-like members arranged adjacent to each other in the circumferential direction, a connecting method by caulking that fits the protrusion into the hole is used, but a connecting method of fitting the protrusion into the hole by a method other than caulking, Other known connection methods (for example, welding or joining) can also be used.
The position and the number of the connection places which connect the plate-shaped member arrange | positioned adjacently are not limited to the position and number which were demonstrated in embodiment.
In the embodiment, the stator of the present invention is used as a stator of a reciprocating generator, but it can also be used as a stator of a rotary generator. Moreover, it can also be used as a stator of a drive motor having various configurations including a reciprocating electric motor and a rotary electric motor.

DESCRIPTION OF SYMBOLS 10 Generator 11 Base member 12 Bearing 20 Stator 30 Stator core 31 Slots 40 and 140 First stator core 50 Second stator core 60 Stator winding 70 Shaft 80 Movure 81 Movable core 90 Permanent magnet 41-46, 141-146 Magnetic steel sheet (plate-like member)
41A1, 41A2, 42A, 43A1, 43A2, 44A, 45A1, 45A2, 46A, 141A-146A Protrusion 41B, 42B1, 42B2, 43B, 44B1, 44B2, 45B, 46B1, 46B2, 141B to 146B Holes 41a, 42a, 43a, 44a, 45a, 46a, 141a, 142a, 143a, 144a, 145a, 146a Edge (radially outer peripheral edge)
41b, 42b, 43b, 44b, 45b, 46b, 141b, 142b, 143b, 144b, 145b, 146b Edge (radially inner peripheral edge)
41c-41g, 42c-42g, 43c, 43f, 44c-44g, 45c-45g, 46c, 46e, 141c-141g, 142c-142g, 143c, 143e, 144c-144g, 145c-145g, 146c, 146e Edge 41h 42h, 44h, 45h, 141h, 142h, 144h, 145h Notch

Claims (11)

A stator having a stator core constituted by a plurality of plate-like members arranged around the axis in the circumferential direction,
The plate-like members arranged adjacent to each other in the circumferential direction are connected at one of the connection locations on the radially outer peripheral side or the connection location on the radial outer periphery side or the connection location on the radial outer periphery side,
The connecting portion on the radially inner peripheral side and the connecting portion on the radially outer peripheral side are alternately provided along the circumferential direction. The stator according to claim 1,
The connecting portion on the radially inner peripheral side includes at least a connecting portion provided in the central portion in the axial direction, and the connecting portion on the radially outer peripheral side is connected to at least one end portion in the axial direction. The stator characterized by including the connection location provided in the location and the edge part of the other side of an axial direction. A stator having a stator core constituted by a plurality of plate-like members arranged around the axis in the circumferential direction,
The plate-like members that are arranged adjacent to each other in the circumferential direction are connected at one of the connecting points on the one axial side or the connecting point on the other side in the axial direction on the radially outer side,
The stator is characterized in that the connecting portion on one side in the axial direction and the connecting portion on the other side in the axial direction are provided alternately along the circumferential direction. The stator according to any one of claims 1 to 3,
Provided with a plurality of plate-like members having different radial lengths,
The plurality of plate-like members are repeatedly arranged along the circumferential direction in one of the longest or shortest radial lengths,
The plate-like members that are arranged adjacent to each other in the circumferential direction are arranged so as to overlap each other at a location that is further away from the radially inner peripheral edge of the plate-like member having the longest radial length. Stator characterized by that. The stator according to claim 4, wherein
As the plurality of plate-like members having different radial lengths, a first plate-like member having a first radial length and a second radial length shorter than the first radial length. 2. A stator using two plate-like members. The stator according to claim 4, wherein
As the plurality of plate-like members having different radial lengths, a first plate-like member having a first radial length and a second radial length shorter than the first radial length. 2. A stator using a second plate member and a third plate member having a third radial length shorter than the second radial length. The stator according to claim 6, wherein
The first plate-like member has a notch formed along the axial direction,
The second plate member is formed with a cutout portion having the same shape as the cutout portion formed in the first plate member along the axial direction.
The second plate-like member is arranged so that the notch of the second plate-like member faces the notch of the first plate-like member,
The third plate-like member includes the first plate-like member and the second plate on a radially outer side from a notch formed in the first plate-like member and the second plate-like member. A stator characterized by being arranged so as to overlap with a shaped member. The stator according to any one of claims 1 to 7,
A plate-like member disposed adjacent to the circumferential direction is connected by a protrusion and a hole into which the protrusion is fitted. The stator according to any one of claims 1 to 8,
The stator, wherein the plate-like members that are arranged adjacent to each other in the circumferential direction and are connected at the connecting points are aligned on the outer peripheral side edge in the radial direction.   A driving machine comprising a stator having a stator core provided with a stator winding, and a mover provided so as to be movable with respect to the stator, wherein the stator is as claimed in claim 1. A driving machine using the stator according to any one of the above.   A generator comprising: a stator having a stator core provided with a stator winding; and a mover provided to be movable with respect to the stator, wherein the stator is the generator. A generator using the stator according to any one of the above.

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