CN117674474A - Rotary electric machine - Google Patents
Rotary electric machine Download PDFInfo
- Publication number
- CN117674474A CN117674474A CN202211048632.6A CN202211048632A CN117674474A CN 117674474 A CN117674474 A CN 117674474A CN 202211048632 A CN202211048632 A CN 202211048632A CN 117674474 A CN117674474 A CN 117674474A
- Authority
- CN
- China
- Prior art keywords
- portions
- magnetic
- coil
- barrier
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004888 barrier function Effects 0.000 claims abstract description 111
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 12
- 230000004907 flux Effects 0.000 description 11
- 238000004804 winding Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A rotary electric machine is provided, which contributes to an improvement in the manufacturing efficiency of the rotary electric machine while improving the torque of the rotary electric machine. The rotating electrical machine has a rotor rotatable about a central axis and a stator located radially outward of the rotor, the rotor having a rotor core and a coil mounted to the rotor core, the rotor having a plurality of pole intermediate portions located between adjacent poles in a circumferential direction, respectively, and having a portion of the rotor core and a plurality of magnetic barrier portions arranged in a radial direction, the magnetic barrier portions being in a convex shape toward a radially inward side when viewed in an axial direction, core portions of the plurality of pole intermediate portions being integrally formed with each other, portions on an outer circumferential surface side of the rotor core being communicated with each other in a circumferential direction in circumferentially adjacent portions of innermost magnetic barrier portions of the circumferentially adjacent pole intermediate portions, thereby constituting one recess recessed from the outer circumferential surface of the rotor core toward the radially inward side and through which a magnetic pole passes, the coil being wound around the core portions of the pole intermediate portions in such a manner as to pass through the outermost magnetic barrier portions and the innermost magnetic barrier portions.
Description
Technical Field
The present invention relates to a rotating electrical machine.
Background
Conventionally, there is a synchronous reluctance motor having a rotor rotatable about a central axis and a stator located radially outward of the rotor, wherein an iron core of the rotor has a magnetic barrier.
In the synchronous reluctance motor, in order to enhance the magnetic force moment for driving the rotor to rotate, a magnet may be provided at a magnetic barrier portion of the rotor core, but the magnet may be demagnetized, and therefore, patent document 1 proposes a technique of providing a coil on the rotor core instead of the magnet.
Prior art literature:
patent document 1: chinese CN210273638U publication
In the case of adopting the technique disclosed in the above-mentioned patent document 1, the magnetic force moment that drives the rotor to rotate is formed of two types of torque, namely: torque for rotating the rotor, which is present when the coil is not provided; and a torque for rotating the rotor due to the provision of the coil.
However, if only the rotor core is perforated and the coil is fitted into the hole, the coil may not be used well to increase the torque of the rotating electrical machine, that is, the magnetic field generated by the coil may not be used well as the magnetic field for generating the torque of the rotor.
Further, when the rotor core is perforated and the coil is mounted in the hole, the mounting work of the coil may cause deterioration in the manufacturing efficiency of the rotary electric machine.
Disclosure of Invention
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rotary electric machine that contributes to an improvement in the torque of the rotary electric machine and an improvement in the manufacturing efficiency of the rotary electric machine.
In order to achieve the above object, the present invention provides a rotary electric machine having a rotor rotatable about a central axis and a stator located radially outward of the rotor, the rotor having a rotor core and a coil mounted to the rotor core, wherein the rotor has a plurality of pole intermediate portions located between adjacent poles in a circumferential direction, respectively, and has a portion of the rotor core and a plurality of pole intermediate portions arranged in a radial direction, the pole intermediate portions having a shape convex toward a radial inner side when viewed in an axial direction, core portions of the plurality of pole intermediate portions being formed integrally with each other, and when a radially innermost pole barrier portion of the plurality of pole intermediate portions is set as an innermost pole barrier portion, and a radially outermost pole barrier portion of the plurality of pole intermediate portions is set as an outermost pole barrier portion, in circumferentially adjacent portions of the outermost pole intermediate portions, the pole intermediate portions are arranged to be in a radially adjacent relationship with each other, and the core portions of the plurality of pole intermediate portions are arranged to be in a radially recessed from the outer peripheral surface of the core and the coil passes through the outermost pole portion of the core and the outermost pole intermediate portion.
According to the rotating electrical machine of the present invention, the rotor has a plurality of pole intermediate portions which are located between adjacent poles in the circumferential direction, respectively, and which have a part of the rotor core and a plurality of magnetic barrier portions arranged in a radial direction, the magnetic barrier portions being in a convex shape toward the radial direction inside when viewed in the axial direction, core portions of the plurality of pole intermediate portions being integrally formed with each other, portions on the outer circumferential surface side of the rotor core being communicated with each other in the circumferential direction in circumferentially adjacent portions of the innermost magnetic barrier portions of the circumferentially adjacent pole intermediate portions, thereby constituting one concave portion recessed from the outer circumferential surface of the rotor core toward the radial direction inside, and the coils are all wound around the core portions of the pole intermediate portions in such a manner as to pass through the outermost magnetic barrier portions and the innermost magnetic barrier portions, and therefore, the magnetic field generated by the coils is easily used as a magnetic field for generating torque of the rotor, thereby increasing the torque of the rotating electrical machine; further, since the coil is easily wound around the rotor core through the recess, and the rotor core is formed without assembling the core portions of the plurality of magnetic pole intermediate portions together, it is advantageous in improving the manufacturing efficiency of the rotating electrical machine.
In the rotating electrical machine according to the present invention, it is preferable that the coil is wound around the wound portion substantially centered on an axis extending in the radial direction through the central axis.
Further, in the rotating electrical machine of the present invention, it is preferable that the coil includes a first coil and a second coil, the first coil passing through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on one side in the circumferential direction from a circumferential center of the outermost magnetic barrier portion; and an end portion of one side in a circumferential direction of the innermost flux-barrier portion of the pole intermediate portion, the second coil passing through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on the other side in the circumferential direction from the circumferential center of the outermost magnetic barrier portion; and an end portion of the other side of the pole intermediate portion in the circumferential direction of the innermost flux-barrier portion.
Further, in the rotating electrical machine of the present invention, it is preferable that the coil includes a first coil and a second coil, the first coil passing through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on one side in the circumferential direction from a circumferential center of the outermost magnetic barrier portion; and an end portion of one side in a circumferential direction of the innermost flux-barrier portion of the pole intermediate portion, the second coil passing through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on the other side in the circumferential direction from the circumferential center of the outermost magnetic barrier portion; and an end portion of the other side in the circumferential direction of the innermost barrier portion of the other magnetic pole intermediate portion adjacent to the magnetic pole intermediate portion on one side in the circumferential direction.
According to the rotating electric machine of the present invention, the coil includes the first coil and the second coil, the first coil passing through: a part of the outermost magnetic barrier part of the magnetic pole intermediate part, which is located on one side in the circumferential direction from the circumferential center of the outermost magnetic barrier part; and an end portion of one side in the circumferential direction of the innermost barrier portion of the pole intermediate portion, the second coil passing through: a part of the outermost magnetic barrier part of the magnetic pole middle part, which is located on the other side of the circumferential center of the outermost magnetic barrier part in the circumferential direction; and an end portion of the other side in the circumferential direction of the innermost barrier portion of the other magnetic pole intermediate portion adjacent to the magnetic pole intermediate portion on one side in the circumferential direction, it is easy to directly wind the coil on the rotor core, thereby improving the space factor of the coil.
In the rotary electric machine according to the present invention, it is preferable that a protruding portion protruding in the circumferential direction is provided at an opening of the recess.
According to the rotating electrical machine of the present invention, since the protruding portion protruding in the circumferential direction is provided at the opening of the recess, the coil is easily prevented from coming out of the recess.
In the rotating electrical machine according to the present invention, the recess preferably has a shape having a larger circumferential dimension as it is located radially inward.
According to the rotating electrical machine of the present invention, the recess is shaped so that the circumferential dimension becomes larger as it is located radially inward, and therefore, the coil is easily prevented from coming out of the recess.
In the rotating electrical machine according to the present invention, it is preferable that the outermost magnetic barrier portion has a groove shape recessed radially inward from an outer peripheral surface of the rotor core.
In the rotating electrical machine of the present invention, it is preferable that a protruding portion protruding in the circumferential direction is provided at the opening of the outermost magnetic barrier portion.
According to the rotating electrical machine of the present invention, the opening of the outermost magnetic barrier is provided with the protruding portion protruding in the circumferential direction, and therefore, the coil is easily prevented from coming out of the outermost magnetic barrier.
According to the rotating electrical machine of the present invention, since the outermost magnetic shield portion has the groove shape recessed radially inward from the outer peripheral surface of the rotor core, it is easier to wind the coil around the rotor core.
In the rotating electrical machine according to the present invention, it is preferable that each of the magnetic pole intermediate portions is formed in an axisymmetric shape with respect to the q-axis.
(effects of the invention)
According to the present invention, the rotor has a plurality of magnetic pole intermediate portions which are located between adjacent magnetic poles in the circumferential direction, respectively, and which have a part of the rotor core and a plurality of magnetic barrier portions arranged in a radial direction, the magnetic barrier portions being in a convex shape toward the radial direction inside when viewed in the axial direction, the core portions of the plurality of magnetic pole intermediate portions being formed integrally with each other, the portions on the outer circumferential surface side of the rotor core being communicated with each other in the circumferential direction in the circumferential adjacent portions of the innermost magnetic barrier portions of the circumferentially adjacent magnetic pole intermediate portions, thereby constituting one concave portion recessed from the outer circumferential surface of the rotor core toward the radial direction inside, and the coils being wound around the core portions of the magnetic pole intermediate portions in such a manner as to pass through the outermost magnetic barrier portions and the innermost magnetic barrier portions, whereby the magnetic field generated by the coils is easily used as a magnetic field for generating torque of the rotor, thereby improving torque of the rotating electrical machine; further, since the coil is easily wound around the rotor core through the recess, and the rotor core is formed without assembling the core portions of the plurality of magnetic pole intermediate portions together, it is advantageous in improving the manufacturing efficiency of the rotating electrical machine.
Drawings
Fig. 1 is a cross-sectional view schematically showing a stator and a rotor included in a rotary electric machine according to an embodiment of the present invention, and shows a cross-section taken in a plane perpendicular to an axial direction.
Fig. 2 is a cross-sectional view schematically showing a stator and a rotor included in the rotary electric machine according to the embodiment of the present invention, and shows one winding method of the coil.
Fig. 3 is a cross-sectional view schematically showing a stator and a rotor included in a rotary electric machine according to an embodiment of the present invention, and shows another winding method of a coil.
Fig. 4 is a partial cross-sectional view schematically showing a stator and a rotor included in a rotary electric machine according to a modification of the present invention.
Fig. 5 is a partial cross-sectional view schematically showing a stator and a rotor included in a rotary electric machine according to another modification of the present invention.
Fig. 6 is a cross-sectional view schematically showing a rotor included in a rotary electric machine according to still another modification of the present invention.
Fig. 7 is a cross-sectional view schematically showing an example of a method of providing a coil on the rotor shown in fig. 7.
Fig. 8 is a cross-sectional view schematically showing a stator and a rotor included in a rotary electric machine according to still another modification of the present invention.
(symbol description)
1. Rotary electric machine
10. Rotor
11. Rotor core
110. Central portion
12. Coil
12A first coil
12B second coil
20. Stator
21. Stator core
211. Iron core back
212. Polar tooth
TH central through hole
CC magnetic pole middle part
P magnetic pole
BA magnetic barrier
BAI innermost flux barriers
BAO outermost magnetic barrier
RP concave part
RP1 protruding part
PT protrusion
M1 first magnetic circuit portion
M2 second magnetic circuit part
M3 third magnetic circuit portion
JG clamp
L central axis
Detailed Description
Next, a rotary electric machine according to an embodiment of the present invention will be described with reference to fig. 1 to 3, in which fig. 1 is a cross-sectional view schematically showing a stator and a rotor included in the rotary electric machine according to an embodiment of the present invention, and is a cross-section taken along a plane perpendicular to an axial direction, fig. 2 is a cross-sectional view schematically showing a stator and a rotor included in the rotary electric machine according to an embodiment of the present invention, and fig. 3 is a cross-sectional view schematically showing a stator and a rotor included in the rotary electric machine according to an embodiment of the present invention, and is another winding mode of a coil.
Further, herein, unless otherwise specified, "axial", "circumferential", "outer periphery", "radially outer side", and "radially inner side" are all based on the central axis L of the rotor.
(integral Structure of rotating Electrical machine)
As shown in fig. 1, the rotary electric machine 1 has a rotor 10 rotatable about a central axis L, and a stator 20 located radially outward of the rotor 10. That is, the rotary electric machine 1 is a so-called inner rotor type motor.
Here, as shown in fig. 1, the rotor 10 includes a rotor core 11 (for example, made of a magnetic material) and a coil 12 attached to the rotor core 11. The rotor 10 has a rotation shaft (not shown) that axially penetrates the center through hole TH of the rotor core 11.
Further, as shown in fig. 1, there are a stator core 21 and a stator coil. The stator core 21 includes: an annular core back 211 centered on the central axis L; and a plurality of pole teeth 212 extending radially inward from the core back and arranged at intervals in the circumferential direction, the radially inward end surfaces of the pole teeth 212 being opposed to the outer circumferential surface of the rotor 10 with a minute gap therebetween. The stator coil is wound around the pole teeth 212 via an insulator, not shown.
Although not shown, the rotary electric machine 1 further includes a housing that houses the rotor 10 and the stator 20. The shaft of the rotor 10 is rotatably supported by the housing via a bearing. The outer peripheral surface of the stator 20 is in contact with the inner surface of the housing.
(Structure of rotor)
As shown in fig. 1, the rotor 10 includes a plurality of (four in the illustrated example, but not limited to) pole intermediate portions CC located between adjacent poles P (corresponding to the d-axis, the magnetic flux is liable to pass along the d-axis) in the circumferential direction, each of the plurality of pole intermediate portions CC includes a part of the rotor core 11 and a plurality of (four in the illustrated example, but not limited to) barrier portions BA arranged in the radial direction, each of the plurality of pole intermediate portions CC has a shape protruding radially inward when viewed in the axial direction, core portions of the plurality of pole intermediate portions CC are integrally formed with each other, and when the radially innermost barrier portion of the plurality of barrier portions BA of the pole intermediate portion CC is set as the innermost barrier portion BAI, and the radially outermost barrier portion of the plurality of barrier portions BA of the pole intermediate portions CC is set as the outermost barrier portion BAO, the circumferentially adjacent pole intermediate portions CC are formed so that the outer circumferential adjacent portions of the outermost barrier portions BAI of the plurality of the circumferentially adjacent pole intermediate portions CC are in the circumferential direction are in a shape protruding radially inward when viewed in the axial direction, each other, and the core portions on the outer circumferential side of the outer circumferential surfaces of the rotor core 11 are in the circumferential direction are recessed from the radially inner side of the core portion CC toward the radially inner side of the core portion CC (the radially outermost barrier portion CC), and the radially extending beyond the radially outermost barrier portion CC in the circumferential direction of the core portion 12, but the radially extending beyond the radially outermost barrier portion in the illustrated example.
Here, as shown in fig. 1 and 2, each magnetic pole intermediate portion CC is formed in an axisymmetric shape with respect to the q-axis (magnetic flux is not likely to pass along the q-axis), and the circumferential center of each barrier portion BA is located on the q-axis. In each of the pole intermediate portions CC, the core portions, i.e., the first magnetic path portion M1, the second magnetic path portion M2, and the third magnetic path portion M3, located between the radially adjacent barrier portions BA are connected to each other to form a single body. The rotor core 11 has a central portion 110 (in the example shown, the outer contour is square when viewed in the axial direction, but is not limited to this), the central portion 110 is located radially inward of the core portions of the plurality of pole intermediate portions CC, and is integrally formed with the core portions of the plurality of pole intermediate portions CC by being connected to the core portions of the plurality of pole intermediate portions CC, respectively, and a central through hole TH (in the example shown, the central portion 110 is circular when viewed in the axial direction, but is not limited to this).
As shown in fig. 1, the circumferential length of the barrier BA located radially inward in each magnetic pole intermediate portion CC is longer (in the illustrated example, the width of each barrier BA is substantially equal except for the outermost barrier BAO, but is not limited thereto). The magnetic barrier BA is formed of slots provided in the stator core 11. The magnetic barrier BA penetrates the rotor core 11 in the axial direction, for example. The barrier portions BA extend along a plane orthogonal to the axial direction and have a shape protruding radially inward when viewed in the axial direction (in the illustrated example, the radially inner edge of each barrier portion BA is formed of three straight line segments connected end to end, but the barrier portions BA are not limited thereto, and may be formed of two or four or more straight line segments, or may be formed of an arc segment or a combination of an arc segment and a straight line segment). In each of the magnetic pole intermediate portions CC, the outermost barrier portions BAO are formed in a groove shape recessed radially inward from the outer peripheral surface of the rotor core 11, and both ends (corresponding to both ends in the extending direction of each barrier portion BA) of each of the barrier portions BA except the outermost barrier portions BAO in the circumferential direction may be opened or closed on the outer peripheral surface of the rotor core 11, and the barrier portions BA except the outermost barrier portions BAO are divided into two parts (halved in the illustrated example) in the circumferential direction by the core portions, respectively.
(winding method of coil on iron core)
In the present embodiment, the coil 12 is wound around the core portion of the magnetic pole intermediate portion CC substantially centered on an axis extending in the radial direction through the central axis L.
Here, the coil 12 may be wound around the rotor core 11 in the manner shown in fig. 2 or in the manner shown in fig. 3.
Specifically, in the coil winding method shown in fig. 2, the coil 12 can be divided into a first coil 12A and a second coil 12B with reference to one magnetic pole intermediate portion CC, wherein the first coil 12A passes through: a portion of the outermost magnetic barrier portion BAO of the magnetic pole intermediate portion CC on one side (clockwise side in fig. 2) in the circumferential direction than the circumferential center (corresponding to the q-axis) of the outermost magnetic barrier portion BAO; and an end portion (not an end portion in a strict sense, only a vicinity of the end portion) of the innermost barrier portion BAI in the circumferential direction of the magnetic pole intermediate portion CC (clockwise side in fig. 2), the second coil 12B passes through: a portion of the outermost magnetic barrier portion BAO of the magnetic pole intermediate portion CC on the other side (counterclockwise direction side in fig. 2) in the circumferential direction from the circumferential center of the outermost magnetic barrier portion BAO; and an end portion (not an end portion in a strict sense, but only a vicinity of the end portion) of the innermost barrier portion BAI of the magnetic pole intermediate portion CC on the other side in the circumferential direction (counterclockwise direction side in fig. 2). On the other hand, in the coil winding method shown in fig. 3, the coil 12 may be divided into a first coil 12A and a second coil 12B with reference to one magnetic pole intermediate portion CC, wherein the first coil 12A passes through: a portion of the outermost magnetic barrier portion BAO of the magnetic pole intermediate portion CC on one side (clockwise side in fig. 2) in the circumferential direction than the circumferential center (corresponding to the q-axis) of the outermost magnetic barrier portion BAO; and an end portion (not an end portion in a strict sense, only a vicinity of the end portion) of the innermost barrier portion BAI in the circumferential direction of the magnetic pole intermediate portion CC (clockwise side in fig. 2), the second coil 12B passes through: a portion of the outermost magnetic barrier portion BAO of the magnetic pole intermediate portion CC on the other side (counterclockwise direction side in fig. 2) in the circumferential direction from the circumferential center of the outermost magnetic barrier portion BAO; and an end portion (not an end portion in a strict sense, but only a vicinity of the end portion) of the other side (a counterclockwise side in fig. 2) in the circumferential direction of the innermost barrier portion BAI of the other magnetic pole intermediate portion adjacent to the magnetic pole intermediate portion CC on one side (a clockwise side in fig. 2) in the circumferential direction.
In the coil winding system shown in fig. 2 and 3, it is preferable that current flow through each coil 12 in the direction shown in the drawing, wherein the symbol x indicates that current flows from the outside of the paper to the inside of the paper, and the symbol dot indicates that current flows from the inside of the paper to the outside of the paper.
(flow of magnetic flux in rotor)
Since the flow of the magnetic flux in the rotor in the coil winding method and the coil energizing method shown in fig. 2 is the same as the flow of the magnetic flux in the rotor in the coil winding method and the coil energizing method shown in fig. 3, and the flow of the magnetic flux in the rotor is the same for each upper magnetic pole intermediate portion CC, the flow of the magnetic flux in the rotor will be described with reference to the upper magnetic pole intermediate portion CC in fig. 2.
As shown in fig. 2, when the coil 12 is not provided on the rotor core 11, magnetic fluxes flowing in the rotor core 11 flow through core portions between the plurality of magnetic barrier portions BA, specifically, the first magnetic path portion M1, the second magnetic path portion M2, and the third magnetic path portion M3, as indicated by arrows AR1, AR2, AR3 (in this case, torque generated between the rotor core 11 and the stator 20 may be also referred to as reluctance torque). On the other hand, as shown in fig. 2, when the coil 12 is provided on the rotor core 11, the magnetic fluxes of the magnetic field formed by the coil 12 flow in the core portions between the plurality of magnetic barrier portions BA, specifically, the first magnetic path portion M1 and the third magnetic path portion M3 as shown by arrows AR4, AR5 (the torque generated in the rotor 10 by the magnetic field formed by the coil 12 may also be referred to as rotor coil torque), and the magnetic fluxes in the first magnetic path portion M1 and the third magnetic path portion M3 as shown by the arrows AR1, AR3 coincide in the flow direction. That is, the torque of the rotary electric machine 1 can be satisfactorily increased by the coil 12.
(main effects of the present embodiment)
According to the rotating electrical machine 1 of the present embodiment, the rotor 10 has the plurality of magnetic pole intermediate portions CC which are located between the adjacent magnetic poles P in the circumferential direction, respectively, and which have the plurality of magnetic barrier portions BA arranged in a radial direction and a part of the rotor core 11, the magnetic barrier portions BA being in a shape convex toward the radial direction inside when viewed in the axial direction, the core portions of the plurality of magnetic pole intermediate portions CC being formed integrally with each other, the portions on the outer circumferential surface side of the rotor core 11 being communicated with each other in the circumferential direction in the circumferential adjacent portions of the innermost magnetic barrier portions BAI of the circumferentially adjacent magnetic pole intermediate portions CC, thereby constituting one concave portion RP recessed toward the radial direction inside from the outer circumferential surface of the rotor core 11, and the coils 12 being wound around the core portions of the magnetic pole intermediate portions CC in such a manner as to pass through the outermost magnetic barrier portions BAO and the innermost magnetic barrier portions BAI, therefore, the magnetic field generated by the coils 12 is easy to be used as a magnetic field for generating the torque of the rotor 10, thereby increasing the torque of the rotating electrical machine 1; further, since the coil 12 is easily wound around the rotor core 11 through the recess RP, and the rotor core 11 is formed without assembling the core portions of the plurality of magnetic pole intermediate portions CC together, it is advantageous in improving the manufacturing efficiency of the rotating electrical machine 1.
The invention has been described above by way of example with reference to the accompanying drawings, it being apparent that the invention is not limited to the embodiments described above.
For example, in the above-described embodiment, the coil 12 is wound around the core portion of the magnetic pole intermediate portion CC substantially centered on the axis extending in the radial direction through the central axis L, but the winding axis of the coil 12 is not limited thereto, and may not pass through the central axis L.
In the above embodiment, the recess RP has a shape in which the circumferential dimension is larger as it is located radially inward, but the present invention is not limited thereto, and as shown in fig. 4, the recess RP may be formed so that the width of at least the portion located on the outer circumferential surface side of the rotor core 11 is not changed in the radial direction.
In the above embodiment, the central portion 110 of the rotor core 11 has a square outer contour as viewed in the axial direction, but the present invention is not limited thereto, and as shown in fig. 4 and 5, the central portion 110 of the rotor core 11 may have a substantially circular outer contour as viewed in the axial direction, or may have an outer contour of another shape.
In the above embodiment, as shown in fig. 6, the protruding portion RP1 protruding in the circumferential direction may be provided at the opening of the recessed portion RP.
In the above embodiment, as shown in fig. 6, the protruding portion PT protruding in the circumferential direction may be provided at the opening of the outermost magnetic barrier portion BAO.
In the above embodiment, particularly when the coil 12 is wound around the rotor core 11 in the coil winding manner shown in fig. 3, it is preferable to cover at least a part of the opening of the recess RP with a jig JG as shown in fig. 7.
In the above embodiment, the rotor 10 has four magnetic pole intermediate portions CC, but the present invention is not limited thereto, and for example, as shown in fig. 8, the rotor 10 may have two magnetic pole intermediate portions CC, or may have a plurality of magnetic pole intermediate portions CC other than two or four.
In the above embodiment, the outermost magnetic barrier portion BAO has a groove shape recessed radially inward from the outer peripheral surface of the rotor core 11, but the outermost magnetic barrier portion BAO is not limited to this, and may be formed in a hole shape whose outer peripheral side is not opened.
It is to be understood that the present invention can freely combine the respective portions in the embodiment, or appropriately modify and omit the respective portions in the embodiment within the scope thereof.
Claims (9)
1. A rotary electric machine having a rotor rotatable about a central axis and a stator located radially outward of the rotor, the rotor having a rotor core and a coil mounted to the rotor core, characterized in that,
the rotor has a plurality of magnetic pole intermediate portions which are located between adjacent magnetic poles in the circumferential direction, and which have a part of the rotor core and a plurality of magnetic barrier portions arranged in a radial direction, the magnetic barrier portions having a shape protruding inward in the radial direction when viewed in the axial direction,
the core portions of the plurality of pole intermediate portions are integrally formed with each other,
when the radially innermost one of the plurality of barrier portions of the magnetic pole intermediate portion is set as the innermost barrier portion and the radially outermost one of the plurality of barrier portions of the magnetic pole intermediate portion is set as the outermost barrier portion,
in the circumferentially adjacent portions of the innermost barrier portions of the circumferentially adjacent pole intermediate portions, portions on the outer peripheral surface side of the rotor core communicate with each other in the circumferential direction, thereby constituting one recess portion recessed from the outer peripheral surface of the rotor core toward the radially inner side and through which the magnetic pole passes,
the coils are all wound around the core portion of the pole intermediate portion so as to pass through the outermost and innermost magnetic barriers.
2. The rotating electrical machine according to claim 1, wherein,
the coil is wound around the core portion of the pole intermediate portion centering on an axis extending in the radial direction through the central axis.
3. The rotating electrical machine according to claim 1, wherein,
the coil comprises a first coil and a second coil,
the first coil passes through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on one side in the circumferential direction from a circumferential center of the outermost magnetic barrier portion; and an end portion of one side in the circumferential direction of the innermost flux-barrier portion of the pole intermediate portion,
the second coil passes through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on the other side in the circumferential direction from the circumferential center of the outermost magnetic barrier portion; and an end portion of the other side of the pole intermediate portion in the circumferential direction of the innermost flux-barrier portion.
4. The rotating electrical machine according to claim 1, wherein,
the coil comprises a first coil and a second coil,
the first coil passes through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on one side in the circumferential direction from a circumferential center of the outermost magnetic barrier portion; and an end portion of one side in the circumferential direction of the innermost flux-barrier portion of the pole intermediate portion,
the second coil passes through: a portion of the outermost magnetic barrier portion of the magnetic pole intermediate portion on the other side in the circumferential direction from the circumferential center of the outermost magnetic barrier portion; and an end portion of the other side in the circumferential direction of the innermost barrier portion of the other magnetic pole intermediate portion adjacent to the magnetic pole intermediate portion on one side in the circumferential direction.
5. The rotating electrical machine according to claim 1, wherein,
a protruding portion protruding in the circumferential direction is provided at an opening of the recess.
6. The rotating electrical machine according to claim 1, wherein,
the concave portion has a shape having a larger circumferential dimension as it is located radially inward.
7. The rotating electrical machine according to claim 1, wherein,
the outermost magnetic barrier portion is in a groove shape recessed radially inward from an outer peripheral surface of the rotor core.
8. The rotating electrical machine according to claim 7, wherein,
a protruding portion protruding in the circumferential direction is provided at the opening of the outermost magnetic barrier portion.
9. The rotating electrical machine according to claim 1, wherein,
each of the magnetic pole intermediate portions is formed in an axisymmetric shape about the q-axis.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048632.6A CN117674474A (en) | 2022-08-30 | 2022-08-30 | Rotary electric machine |
| PCT/JP2022/046720 WO2023113044A1 (en) | 2021-12-17 | 2022-12-19 | Rotating electrical machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211048632.6A CN117674474A (en) | 2022-08-30 | 2022-08-30 | Rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117674474A true CN117674474A (en) | 2024-03-08 |
Family
ID=90079419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211048632.6A Pending CN117674474A (en) | 2021-12-17 | 2022-08-30 | Rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117674474A (en) |
-
2022
- 2022-08-30 CN CN202211048632.6A patent/CN117674474A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6592234B2 (en) | Single phase brushless motor | |
| JP4900132B2 (en) | Rotor and rotating electric machine | |
| JP2005176424A (en) | Rotor for dynamo-electric machine | |
| CN104953737B (en) | A kind of permanent magnetic brushless | |
| CN109104007B (en) | Brushless motor and stator thereof | |
| JPH08251891A (en) | Hybrid exciting electric rotary machine | |
| JP5114963B2 (en) | Permanent magnet embedded rotor | |
| JP2019180132A (en) | Rotor core, rotor, and synchronization reluctance rotary electric machine | |
| JP2006271142A (en) | Rotary machine | |
| CN113224870B (en) | Rotary electric machine | |
| WO2021106395A1 (en) | Rotary electric machine, rotor, and electromagnetic steel plate | |
| US4820951A (en) | Multiphase small size brushless DC motor | |
| JP2019103168A (en) | Motor and blower | |
| JP6641545B1 (en) | Rotating electric machine | |
| JP6546042B2 (en) | Synchronous reluctance motor | |
| JP5465866B2 (en) | Stator core and rotating electric machine | |
| JP2017046580A (en) | Single phase motor | |
| CN117674474A (en) | Rotary electric machine | |
| JP7085853B2 (en) | Rotating electric machine, manufacturing method of rotating electric machine, and blower | |
| JP2018108006A (en) | Rotor and reluctance rotary electric machine | |
| JP2018107999A (en) | Assembly method for reluctance rotary electric machine and reluctance rotary electric machine | |
| JP2005198463A (en) | Housing of dynamo-electric machine | |
| JP5569542B2 (en) | Permanent magnet embedded rotor | |
| JP6745212B2 (en) | Rotor and reluctance rotating electric machine | |
| JP2007259514A (en) | Rotating electric machine for employing divided stator iron core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |