JP2015228780A - Axial gap type rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an axial gap type rotary electric machine which stably holds a lamination iron core and is easily manufactured.SOLUTION: An axial gap type rotary electric machine includes: a stator; and a rotor which is disposed facing the stator in an axial direction. The stator includes: a core arranged in a circumferential direction; and a holding member which holds the core. The core includes a protruding part which protrudes in the circumferential direction. The holding member includes a first extention part and a second extension part which extend in a radial direction. The protruding part is sandwiched between the first extension part and the second extension part.

Description

  The present invention relates to an axial gap type rotating electrical machine.

  In an axial gap type rotating electrical machine in which a rotor is disposed in an axial direction so as to face the stator, as pointed out in Patent Document 1, a support member for the stator core so that a desired magnetic circuit can be configured. Need to be placed properly. For example, in patent document 1, the core is hold | maintained by engaging the engaging part of a segment stator core with the some engaged part provided in the peripheral part of the centerpiece. Moreover, in patent document 2, it is set as the structure which press-fits a stator core to the groove | channel previously provided in metal core holding members.

JP 2013-90461 A JP 2010-246171 A

  However, when the output of the rotating electrical machine itself is designed to be large or when the vibration at the installation location is large, there is a possibility that the above-described method cannot obtain a sufficient holding strength against the vibration applied to the stator.

  In addition, the stator core of an axial gap type rotating electrical machine may be composed of a plurality of segments or pieces as in Patent Document 1, and in such a case, it is not possible to process caulking or the like that integrates the layers with high strength. In some cases. In such a case, when a laminated steel sheet is used for the stator core, it is necessary to hold it in the stacking direction so as not to cause a shift between the stacks.

  Furthermore, as shown in Patent Document 1, assembling each segment core to a holding member such as a center piece from the radial direction has a problem during manufacture regardless of whether the segment core is inserted from the outer diameter or the inner diameter. . First, when assembling from the outer diameter direction, it may be difficult to fix the outer peripheral portion of the stator with the housing by shrink fitting or the like. Further, when assembling from the inner diameter direction, if the radial dimension of the segment core is larger than the inner peripheral length of the stator, workability may be deteriorated.

  The problem to be solved by the present invention is to provide a rotating electrical machine that can stably hold a laminated core and can be easily manufactured in an axial gap type rotating electrical machine.

  In order to solve the above problems, the features of the present invention are as follows, for example.

  A stator and an axially disposed rotor facing the stator. The stator includes a circumferentially disposed core and a holding member that holds the core, and the core is circumferentially arranged. The holding member has a first extending portion and a second extending portion extending in the radial direction, and the protruding portion is a first extending portion and a second extending portion. An axial gap type rotating electrical machine that is sandwiched.

  According to the present invention, in an axial gap type rotating electrical machine, a laminated core can be stably held and manufactured easily. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

1 is an external view showing an entire rotating electrical machine according to an embodiment of the present invention. It is the figure which cut and showed a part perimeter about the whole rotary electric machine by the present invention. It is the figure which decomposed | disassembled the whole rotary electric machine by this invention for every structure part. It is a figure which shows the components which comprise the rotor of the rotary electric machine which concerns on one Embodiment of this invention. It is the figure which decomposed | disassembled the stator of the rotary electric machine by Embodiment 1 for every component. It is the figure which looked at the stator core of the rotary electric machine by Embodiment 1 from the axial direction output side. FIG. 3 is a circumferential cross-sectional view of the slot portion of the stator core of the rotating electrical machine according to the first embodiment. It is the figure which decomposed | disassembled the stator core of the rotary electric machine by Embodiment 2 for every component. It is the figure which looked at the stator core of the rotary electric machine by Embodiment 2 from the axial direction output side. It is the figure which decomposed | disassembled the stator core of the rotary electric machine by Embodiment 3 for every component. 6 is an enlarged cross-sectional view showing a stator core and a holding member of a rotating electrical machine according to Embodiment 3. FIG. 6 is an enlarged view of a holding member according to Embodiment 3. FIG. 6 is an enlarged sectional view showing a stator core and a holding member of a rotating electrical machine according to Embodiment 4. FIG. FIG. 10 is a view of the vicinity of a slot portion of a stator core according to a fifth embodiment when viewed from the axial direction. 10 is an enlarged view of a holding member according to Embodiment 5. FIG. 10 is an enlarged cross-sectional view showing a stator core and a holding member of a rotating electrical machine according to Embodiment 6. FIG. FIG. 10 is an enlarged cross-sectional view showing a stator core and a holding member of a rotating electrical machine according to Embodiment 7.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description shows specific examples of the contents of the present invention, and the present invention is not limited to these descriptions. Various modifications by those skilled in the art are within the scope of the technical idea disclosed in this specification. Changes and modifications are possible. In all the drawings for explaining the present invention, components having the same function are denoted by the same reference numerals, and repeated description thereof may be omitted.

  The external view which shows the whole rotary electric machine which concerns on one Embodiment of this invention was shown in FIG. The rotating electrical machine 100 includes a rotor 1 (not shown), a stator 2 (not shown), a shaft 7, a housing 11, and a bracket 12. A rotor 1 and a stator 2 (not shown) are accommodated in a space surrounded by a cylindrical housing 11 and a bracket 12 attached so as to cover both ends of the housing 11 in the axial direction. The bracket 12 includes an output side bracket 12a and a non-output side bracket 12b.

  The housing 11 is attached so as to cover the stator 2 from the outer diameter, and fixes and holds the stator 2.

  The output side bracket 12 a is attached to the housing 11 from the axial output side end and holds the rotor 1 via the bearing 8. The non-output side bracket 12 b is attached to the housing 11 from the end in the axial direction opposite to the output side, and holds the rotor 1 via the bearing 8.

  The shaft 7 is an output shaft. When the rotating electrical machine 100 is operated as an electric motor, the output is transmitted to a mechanical load, and when the rotating electrical machine 100 is operated as a generator, mechanical power is received as an input to the rotating electrical machine.

  Each component of the rotating electrical machine 100 is generally circumferential or cylindrical. However, in the following description, each component and the cross-sectional shape thereof will be described using a diagram in which a part in the circumferential direction is deleted. . 2 to 5 are diagrams related to the first embodiment.

  FIG. 2 shows the entire rotating electrical machine with a part of the circumferential direction deleted, and FIG. 3 is an exploded view of the entire rotating electrical machine for each component. The output-side bracket 12a and the housing 11 are cut out for a half circumference, and the output-side rotor 1a and the stator 2 are also shown with a part in the circumferential direction removed. The counter-output side rotor 1b and the counter-output side bracket 12b show the entire circumference.

  Opposing to the axial direction of the stator 2, an output-side rotor 1a, a counter-output-side rotor 1b, and two rotors 1 are arranged, and the rotor 1 is configured to be integral with the shaft 7 and rotatable. The output side rotor 1a is supported by the output side bracket 12a by a bearing 8. A bearing 8 is also arranged on the non-output side (not shown), and the non-output side rotor 1b is supported by the anti-output side bracket 12b by the bearing 8. The bearing 8 holds the rotor 1 rotatably on the bracket 12.

  FIG. 4 is a view showing components constituting the rotor of the rotating electrical machine according to the embodiment of the present invention. The rotor 1 includes a rotor core 9, a plurality of permanent magnets 10, and a rotor frame 13. The rotor core 9 includes a yoke 14 that is continuous in the circumferential direction, and salient pole portions 15 that protrude in the gap direction between the opposing stators.

  In the axial gap type rotating electrical machine, the magnetic flux that has passed through the gap in the axial direction moves in the circumferential direction in the yoke 14 provided in the rotor 1 or the stator 2 to form a magnetic flux path for one pole pair. In the present embodiment, a yoke 14 in which magnetic flux moves in the circumferential direction is provided on the rotor core 9. Therefore, the magnetic flux passes through the gap between the permanent magnet 10 and the opposing stator core 6, passes through the core 3 in the axial direction, reaches the other permanent magnet 10, and passes through the rotor core 9 in the circumferential direction. Thereafter, a path to the permanent magnet 10 of the adjacent pole is taken. That is, when a magnetic member such as a yoke 14 that is continuous in the circumferential direction is provided on the stator core 6, a path through which a magnetic flux is short-circuited is formed, which causes a decrease in output of the rotating electrical machine. For this reason, in this embodiment, in order to prevent the magnetic path in the stator core 6 from being short-circuited, the holding member 4 is preferably made of a material such as a nonmagnetic metal or resin.

  5 is an exploded view of the stator 2 for each component. FIG. 6 is a view of a part of the stator core 6 as seen from the axial output side. FIG. 7 is a circumferential sectional view of the slot portion. .

  The stator 2 includes a coil 5 and a stator core 6. The stator core 6 includes a core 3 and two holding members 4. The plurality of cores 3 are held by two holding members 4. A coil 5 is wound around the stator core 6.

  The core 3 is arranged in the circumferential direction. The core 3 is formed by laminating laminated steel plates in the radial direction. By making the laminated steel sheets laminated in the radial direction, the main magnetic flux passing through the gap and the leakage magnetic flux created by the coil 5 are less likely to be linked to the steel sheet surface. The core 3 has a protruding portion 31 protruding in the circumferential direction. In the circumferential direction, protrusions 31 are formed on both side surfaces of the core 3.

  As shown in FIG. 7, the holding member 4 includes a first extending portion 41 and a second extending portion 42 that extend in the radial direction. In FIG. 5, one of the two holding members 4 has a first extending portion 41 and the other has a second extending portion 42. The first extending part 41 and the second extending part 42 extend in the radial direction. The core 3 is held by sandwiching the protruding portion 31 of the core 3 by the first extending portion 41 and the second extending portion 42 of the holding member 4.

  With this configuration, the shift of the core 3 is suppressed and stable holding is possible. Further, even when the laminated steel plates of the core 3 laminated in the radial direction are not integrated, the circumferential direction and the axial direction in the direction in which the plates are displaced are fixed by the holding member 4, so that deviation is suppressed. Can be held.

  Furthermore, since the holding member 4 has a circumferential shape, it is easy to fix the housing 11 to the housing 11 by press-fitting or shrink fitting at the outer diameter portion. Alternatively, the holding member 4 may be fixed using a bolt or the like on the outer diameter side.

  As described above, according to the present embodiment, it is possible to stably hold the stator core of the axial gap type rotating electric machine.

  Further, as a procedure for manufacturing the rotating electrical machine of the present embodiment, since the plurality of cores 3 can be arranged in the holding member 4 from the axial direction, the assembly is performed even when there is not enough space in the inner peripheral portion. There is no loss of sex. Furthermore, you may comprise so that the circumferential direction position of the core 3 may be determined by the 1st extension part 41 and the 2nd extension part 42 of the holding member 4. FIG. That is, according to this embodiment, it is possible to improve workability at the time of manufacturing the iron core and facilitate the manufacturing.

  FIG. 8 is a view showing a stator core of a rotating electrical machine according to the second embodiment. FIG. 9 is a view of a part of the stator core as viewed from the axial output side.

  The holding member 4 is provided with a locking portion 40 having a shape corresponding to a slot of a stator core of a radial gap type rotating electric machine. The locking portion 40 overlaps the outer diameter portion of the core 3 in the radial direction and locks the core 3. In FIG. 9, the first extending portion 41 has a locking portion 40 that overlaps the core 3 in the radial direction, but the locking portion 40 may be provided in the second extending portion 42. Both the extending part 41 and the second extending part 42 may have a locking part 40.

  As described above, the core 3 is held by the holding member 4 by the locking portion 40 from the outer periphery while the protruding portion 31 is sandwiched between the first extending portion 41 and the second extending portion 42. Therefore, the holding member 4 suppresses the shift of the core 3 in any of the axial direction, the circumferential direction, and the outer diameter direction, and can be stably held.

  FIG. 10 is a view showing a stator core of a rotating electrical machine according to the third embodiment, FIG. 11 is an enlarged circumferential sectional view of the stator core 6 of the rotating electrical machine according to the third embodiment, and FIG. 12 is a third embodiment. It is an enlarged view of the holding member by a form, and has shown the cross-sectional shape in the circumferential direction center of the slot 20 provided with two or more by the stator core 6. FIG.

  An axially bent portion 43 (locking portion) bent in the axial direction is provided on the inner diameter side of the holding member 4, and the axial bent portion 43 is locked by overlapping with the inner diameter side of the protruding portion 31, so that Deviation can also be suppressed. Therefore, the holding member 4 suppresses the deviation of the core 3 in any of the axial direction, the circumferential direction, the inner diameter direction, and the outer diameter direction, and can be stably held.

  FIG. 13 is a view showing a stator core of a rotating electrical machine according to the fourth embodiment.

  A circumferentially bent portion 44 (locking portion) bent in the circumferential direction is provided on the inner peripheral side of the first extending portion 41 of the holding member 4, and the circumferentially bent portion 43 is locked by overlapping with the inner diameter side of the core 3. And the shift | offset | difference to an internal diameter direction can also be suppressed. Therefore, the holding member 4 suppresses the deviation of the core 3 in any of the axial direction, the circumferential direction, the inner diameter direction, and the outer diameter direction, and can be stably held. In addition, since the circumferential bent portion 44 is formed in the circumferential direction, the engaging portion between the core 3 and the circumferential bent portion 44 can be lengthened.

  FIG. 14 is a view of the vicinity of the slots of the stator core according to the fifth embodiment as viewed from the axial direction. FIG. 15 is an enlarged view of a holding member according to the fifth embodiment.

  In the present embodiment, one holding member of the two holding members 4 fixes the first extending portion 41 and the second extending portion 42 with the bolt 200, so that the other holding member of the two holding members 4 and When connected and projected from the axial direction, the bolt 200 is formed such that the bolt 200 overlaps the projected portion of the protruding portion 31.

  Screw holes are provided in the first extending portion 41 and the second extending portion 42 of the holding member 4 and are connected by bolts 200. Further, the head projection portion of the bolt 200 is disposed so as to overlap the protruding portion 31 of the core 3. Thereby, the core 3 can be firmly fixed.

  FIG. 16 is an enlarged sectional view in the circumferential direction of the stator core of the rotating electrical machine according to the sixth embodiment, and shows a sectional shape at the circumferential center of a plurality of slots provided in the stator core. In the present embodiment, one holding member of the two holding members 4 is arranged to face the other holding member of the two holding members 4 in the axial direction so as to provide a flow path space through which the refrigerant flows.

  A coolant channel space 51 is provided in the holding member 4. Other configurations are the same as those of the third embodiment. The refrigerant flow path space 51 is connected to a refrigerant inlet and a refrigerant outlet (not shown), and has a role of introducing refrigerant supplied from inside and outside the rotating electrical machine into the stator core 6.

  The coolant channel space 51 is formed in a hollow shape when the holding member 4 is manufactured. When the holding member 4 is composed of two members, a groove is formed in one member and then surrounded by the other member. You may comprise by forming the defined space. The cross-sectional shape of the refrigerant flow path space 51 is not limited to a rectangle as shown in FIG. 16, and may be a circle or an ellipse in addition to a polygon.

  By providing the coolant flow path space 51 in the holding member 4, it is possible to introduce the coolant to the vicinity of the coil 5 and the stator core 6, and it is possible to efficiently cool the heat generated in these.

  FIG. 17 is an enlarged sectional view in the circumferential direction of the stator core of the rotating electrical machine according to the seventh embodiment, and shows a sectional shape at the circumferential center of a plurality of slots provided in the stator core 6. In the present embodiment, one holding member of the two holding members 4 is arranged to face the other holding member of the two holding members 4 in the axial direction so as to provide a flow path pipe through which the refrigerant flows.

  A refrigerant pipe 52 is provided on the holding member 4. Other configurations are the same as those of the third embodiment. The refrigerant pipe 52 is connected to a refrigerant inlet and a refrigerant outlet (not shown), and has a role of introducing refrigerant supplied from inside and outside the rotating electric machine into the stator core 6.

  The cross-sectional shape of the refrigerant pipe 52 is not limited to a circle as shown in FIG. 17 but may be a polygon such as a rectangle in addition to an ellipse.

  By providing the refrigerant pipe 52 on the holding member 4, it is possible to introduce the refrigerant to the vicinity of the coil 5 and the stator core 6, and it is possible to efficiently cool the heat generated in these. Further, by passing through the refrigerant pipe 52, the refrigerant can be introduced into the rotating electrical machine 100 even when a refrigerant such as water is used.

DESCRIPTION OF SYMBOLS 1 Rotor 1a Output side rotor 1b Counter output side rotor 2 Stator 3 Core 4 Holding member 5 Coil 6 Stator core 7 Shaft 8 Bearing 9 Rotor core 10 Permanent magnet 11 Housing 12 Bracket 12a Output side bracket 12b Counter output Side bracket 13 Rotor frame 14 Yoke 15 Salient pole portion 20 Slot 31 Protruding portion 40 Locking portion 41 First extending portion 42 Second extending portion 43 Axial bending portion 44 Circumferential bending portion 51 Refrigerant flow path space 52 Refrigerant Piping 100 Rotating electric machine 200 volts

Claims (6)

A stator,
A rotor arranged to face the stator in the axial direction,
The stator is
A core disposed in the circumferential direction; and a holding member that holds the core;
The core has a protruding portion protruding in the circumferential direction,
The holding member has a first extending portion and a second extending portion extending in the radial direction,
The protruding portion is an axial gap type rotating electrical machine sandwiched between the first extending portion and the second extending portion. In claim 1,
The first extending portion is an axial gap type rotating electrical machine having a locking portion that overlaps the core in the radial direction. In claim 2,
The locking portion is an axial gap type rotating electrical machine that bends in the axial direction so as to overlap the protruding portion in the radial direction. In claim 2,
The locking portion is an axial gap type rotating electrical machine that bends in the circumferential direction so as to overlap the core in the radial direction. In any one of Claims 1 thru | or 4,
The holding member is composed of a first holding member having the first extending portion and a second holding member having the second extending portion,
The second holding member is an axial gap type rotating electrical machine that is disposed to face the first holding member in the axial direction so as to provide a flow path space through which a refrigerant flows. In any one of Claims 1 thru | or 4,
The holding member is composed of a first holding member having the first extending portion and a second holding member having the second extending portion,
The first holding member is connected to the second holding member by fixing the first extending portion and the second extending portion with a bolt,
When projected from the axial direction, the bolt is an axial gap type rotating electrical machine formed so that a projected portion of the bolt overlaps a projected portion of the protruding portion.