WO2015198382A1 - Rotor synchrone de machine électrique tournante - Google Patents

Rotor synchrone de machine électrique tournante Download PDF

Info

Publication number
WO2015198382A1
WO2015198382A1 PCT/JP2014/066585 JP2014066585W WO2015198382A1 WO 2015198382 A1 WO2015198382 A1 WO 2015198382A1 JP 2014066585 W JP2014066585 W JP 2014066585W WO 2015198382 A1 WO2015198382 A1 WO 2015198382A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
core plate
core
arc
circumferential
Prior art date
Application number
PCT/JP2014/066585
Other languages
English (en)
Japanese (ja)
Inventor
真臣 森下
Original Assignee
日産自動車株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to PCT/JP2014/066585 priority Critical patent/WO2015198382A1/fr
Priority to JP2016528775A priority patent/JP6656149B2/ja
Publication of WO2015198382A1 publication Critical patent/WO2015198382A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a synchronous rotor for a rotating electrical machine including a cylindrical rotor core formed by laminating a plurality of arc-shaped core plates and a permanent magnet embedded in the rotor core.
  • a rotor core formed by stacking a plurality of divided core plates in an annular shape and a magnet (permanently) inserted into a magnet hole (magnet hole) formed in the divided core plate Magnet).
  • two through holes are formed on the inner peripheral side of the divided core plate, and when the divided core plate is arranged in an annular shape, the through holes are arranged at equal intervals.
  • the rotor core is laminated so that the through-holes communicate with each other along the axial direction of the rotor core, and a fixing pin is inserted into the communicating through-hole. That is, a structure in which split core plates stacked in the axial direction are coupled to each other by a fixing pin is known (for example, see Patent Document 1).
  • the end core region from the fixed pin to the end face of the split core plate has a cantilever structure that is not restrained or supported in the split core plate.
  • the deformation in the outer diameter direction is increased due to the centrifugal force generated when the rotor rotates as compared with the region where the cantilever structure is not used.
  • the stress of the bridge portion where the wall thickness between the outer peripheral end of the split core plate and the outer diameter side of the magnet hole is relatively thin increases. There is a risk of damaging the bridge. For this reason, the problem that the reliability with respect to centrifugal strength of the rotor core is lowered has occurred.
  • the present invention has been made paying attention to the above problem, and an object of the present invention is to provide a synchronous rotor for rotating electrical machines that can improve the centrifugal strength reliability of the rotor core.
  • a synchronous rotor for a rotating electrical machine includes a cylindrical rotor core formed by stacking a plurality of arc-shaped core plates, and a permanent magnet embedded in the rotor core.
  • a coupling portion that couples the plurality of arc-shaped core plates stacked in the rotor axial direction is provided on the inner peripheral side of the rotor core.
  • the arc-shaped core plate has a magnet hole opened on the outer peripheral side of the plate, and a cutout portion formed by cutting out both end portions of the inner peripheral surface of the core plate that avoids the portion to be the coupling portion.
  • the arc-shaped core plate in the synchronous rotor for rotating electrical machines has a cantilever structure in the region from the coupling portion to the end portion of the core plate, and has a notch in that region. That is, when the rotor rotates, the centrifugal force generated at both ends of the core plate is reduced by having the notches at both ends of the inner peripheral surface of the core plate in that region. By reducing the centrifugal force, deformation due to the centrifugal force in the outer diameter direction at both ends of the core plate can be suppressed to be small, and an increase in the stress of the bridge portion can be suppressed. As a result, the centrifugal strength reliability of the rotor core can be improved during rotor rotation.
  • FIG. 1 is an exploded perspective view of a synchronous rotor for a rotating electrical machine according to Embodiment 1.
  • FIG. FIG. 3 is a schematic plan view of an arc-shaped core plate that forms the rotor core according to the first embodiment. It is an assembly block diagram which has arrange
  • FIG. 6 is a process diagram for inserting a permanent magnet into the magnet hole of the first embodiment.
  • FIG. 6 is a schematic plan view of an arc-shaped core plate that forms a rotor core according to Embodiment 2.
  • FIG. FIG. 10 is a schematic enlarged plan view of a notch portion showing a modified example of the curved shape of the notch portion according to the second embodiment.
  • FIG. 10 is a schematic enlarged plan view of a notch portion showing a modification of the linear shape of the notch portion according to the second embodiment.
  • 6 is a schematic plan view of an arc-shaped core plate that forms a rotor core according to Embodiment 3.
  • FIG. 1 is an exploded perspective view of a synchronous rotor for a rotating electrical machine according to a first embodiment.
  • the overall configuration will be described with reference to FIG. Note that some details of the second and lower layers from the top are omitted.
  • the synchronous rotor 1 for a rotating electrical machine constitutes a motor together with a stator, and is applied, for example, as a travel drive source for an electric vehicle or a hybrid vehicle.
  • the rotating electrical machine synchronous rotor 1 has a cylindrical rotor core 2, a permanent magnet 3 embedded in the rotor core 2, and a rotor shaft 4 fitted to the rotor core 2.
  • the rotor core 2 is formed in a cylindrical shape having a space inside by laminating a plurality of arc-shaped core plates 2a (see FIG. 2) in an annular shape and laminating the annularly arranged core plates 2a. Yes.
  • the arc-shaped core plate 2a is made of an electromagnetic steel plate, and as shown in FIG. 2, the arc angle ⁇ 1 is 120 °, and has a magnet hole 3a, a welded portion 5, and a notch portion 6. is doing. As shown in FIG. 2, four magnet holes 3a and four welds 5 are formed in the core plate 2a at equal intervals. Moreover, as shown in FIG. 2, the both ends 2PE and 2PE of the core plate 2a have a notch 6.
  • the magnet hole 3a is a hole for inserting the permanent magnet 3 opened on the outer peripheral side of the plate.
  • the shape of the magnet hole 3a is formed in a rectangular shape spreading in the circumferential direction.
  • the weld 5 is formed at the inner peripheral edge of the plate as shown in FIG.
  • the welded portion 5 has a concave surface 5a and a convex portion 5b.
  • the concave surface 5a is formed to be recessed in the outer diameter direction from the inner peripheral surface 2IP of the core plate 2a.
  • the shape of the concave surface 5a is a curved surface as shown by the solid line and the broken line.
  • the convex portion 5b is formed on a part of the concave surface 5a so as to protrude from the concave surface 5a to the inner peripheral surface 2IP of the core plate 2a.
  • the shape of the convex part 5b is formed in a triangular shape.
  • the notch portion 6 is a position that avoids a portion to be a weld joint portion 11 (joint portion, weld bead, see FIG. 5) described later, that is, a weld portion 5, and is within the core plate 2a. Both end portions 2PE and 2PE of the peripheral surface 2IP are cut out. As shown in FIG. 2, the notch 6 has a shape in which a region A from the offset position 2FS to the end surface 2EF of the core plate 2a is notched to a predetermined depth PD from the inner peripheral surface 2IP of the core plate in the outer diameter direction. (Shape of the notch 6) is set.
  • the predetermined depth PD in the first embodiment is constant in the outer diameter direction from the inner peripheral surface 2IP of the core plate 2a.
  • the offset position 2FS is a position offset from the welded portion 5 by the offset amount FS toward the circumferential end face of the core plate 2a.
  • the welding part 5 used as this object is the welding part 5 arrange
  • the offset amount FS offset from the welded portion 5 to the circumferential end surface side of the core plate 2a is an amount that can be formed by a welded joint portion 11 (joint portion, weld bead, see FIG. 5) described later, that is, welding.
  • the predetermined depth PD is a depth that does not reach the magnet hole 3a disposed on the end 2PE side of the core plate 2a from the inner peripheral surface 2IP of the core plate 2a, and is inserted into the magnet hole 3a.
  • the depth is set in consideration of the formation of magnetic field lines by the permanent magnet 3. That is, the notch 6 is formed while maintaining the formation of the magnetic lines of force by the permanent magnet 3.
  • the welded portion 5 is disposed on the same axis line of the radial axis CL that connects the center point O of the core plate 2a and the center position in the circumferential direction of the magnet hole 3a in the radial direction. That is, the center positions in the circumferential direction of the magnet hole 3a and the welded portion 5 are arranged on the same axis line of the radial axis line CL. Similarly, the circumferential center positions of the concave surface 5a and the convex portion 5b are also arranged on the same axis line of the radial axis line CL.
  • the center point O of the core plate 2a is the same as the center point O when the plurality of arc-shaped core plates 2a are annularly arranged (see FIG. 3). That is, since the rotor core 2 is formed by laminating the annularly arranged core plates 2a, the center point O of the core plate 2a is the same as the center point of the rotor core 2.
  • the inner peripheral surface 2IP of the core plate 2a and the inner peripheral surface 2IP of the rotor core 2 have the same center point for the same reason.
  • a cylindrical rotor core 2 is formed by laminating a plurality of such arc-shaped core plates 2a.
  • a linear continuous welded portion 10 is formed by the welded portions 5 between the plurality of core plates 2a stacked in the rotor axis Ax direction (see FIG. 5).
  • a weld bead 11 (weld joint, joint) is formed as shown in FIGS.
  • stacked several core plates 2a are couple
  • This welding joining may be performed by melting the base material, that is, the convex portion 5b of the welded portion 5 in the continuous welded portion 10, or may be performed by melting the convex portion 5b and the welding wire.
  • the amount of melting of the welding wire is such that it is within the concave surface 5a of the welded portion 5, that is, within the range from the concave surface 5a to the inner peripheral surface 2IP of the core plate 2a.
  • the notch part 6 is formed avoiding the welding part 5 used as the weld bead 11, the uniformity of the shape of the weld bead 11 can be ensured.
  • the rotor shaft 4 is formed in a cylindrical shape having a space inside. A rotation shaft (not shown) or the like is inserted into this inner space. The rotor shaft 4 is press-fitted into the rotor core 2 so that the rotor shaft 4 is fitted to the rotor core 2.
  • the operation of the rotating electrical machine synchronous rotor 1 according to the first embodiment will be described by dividing it into “a manufacturing method of the rotating electrical machine synchronous rotor”, “a characteristic operation of the rotating electrical machine synchronous rotor”, and “an operation of the notch shape”.
  • a method of manufacturing a synchronous rotor 1 for a rotating electrical machine comprising a synchronous rotor 1 having a cylindrical rotor core 2 formed by laminating a plurality of arc-shaped core plates 2a and a permanent magnet 3 embedded in the rotor core 2.
  • a core plate forming step includes a core plate forming step, a rotor core assembling step, a rotor welding joining step, and a permanent magnet insertion step.
  • each step will be described. Note that some details of the second and lower layers from the top of FIGS. 5 and 6 are partially omitted.
  • a magnet hole 3a for inserting the permanent magnet 3 opened on the outer peripheral side of the plate and an inner peripheral end of the plate are formed in the arc-shaped core plate 2a.
  • the welded portion 5 and the notched portion 6 in which both end portions 2PE and 2PE of the inner peripheral surface 2IP of the core plate 2a are notched are formed.
  • a plurality of arc-shaped core plates 2a are annularly arranged. That is, as shown in FIG. 2, about three core plates 2a having an arc angle ⁇ 1 of 120 ° are used and arranged in an annular shape.
  • the annularly disposed core plate 2a is defined as a first layer.
  • the cylindrical rotor core 2 is assembled by stacking the annular core plates 2a. That is, as shown in FIG.
  • a two-layer core plate 2b is laminated.
  • the third layer core plate 2 c is laminated on the second layer core plate 2 b so as to be shifted 30 ° counterclockwise with respect to the second layer core plate 2 b.
  • the cylindrical rotor core 2 is formed by laminating the next layer so as to be shifted counterclockwise by 30 ° with respect to the previous layer, that is, straddling the joint between the core plates 2a of the previous layer. Is assembled. For assembling this cylindrical rotor core 2, for example, about 54 core plates 2a are used, and about 18 layers are laminated.
  • the continuous welded portion 10 is disposed on the same axis line of the radial axis CL that connects the center position in the circumferential direction of the magnet hole 3a and the center point of the rotor core 2 (center point of the core plate 2a) O in the radial direction.
  • the continuous weld 10 is welded.
  • the weld bead 11 is formed.
  • the permanent magnet 3 is inserted into the communicating magnet hole 3a.
  • the rotor shaft 4 is fitted into the rotor core 2 by press-fitting the rotor shaft 4 into the rotor core 2 thus manufactured.
  • the synchronous rotor 1 for rotary electric machines can be manufactured by welding the welding part 5 between the several core plates 2a. .
  • Example 1 by manufacturing the synchronous rotor for rotary electric machines, in Example 1, since the convex part 5b can be welded intensively, the penetration of the weld bead 11 is achieved while minimizing the amount of heat input during welding.
  • the width and depth can be adjusted constant (stable) and easily, and the joining strength of the rotor core 2 can be increased.
  • the anti-centrifugal strength can be ensured by welding joint between the core plates 2a by a single piece of the synchronous rotor 1 assembly, damage due to load input to the permanent magnet 3 is prevented. As a result, the durability reliability of the permanent magnet 3 can be improved by ensuring the centrifugal strength of the rotor core 2.
  • the surface of the rotor shaft 4 may be a simple cylindrical shape as shown in FIG.
  • the split core plate is formed with a magnet hole for inserting a permanent magnet and two through holes for inserting a fixing pin.
  • the through holes are formed on the inner peripheral side of the divided core plate.
  • the through holes are arranged at equal intervals.
  • a rotor core is formed by laminating a plurality of divided core plates formed in this manner while being arranged in an annular shape, a permanent magnet is inserted into the magnet hole, and a fixing pin is inserted into the through hole.
  • a synchronous rotor in which the rotor shaft is fitted to the rotor core, that is, the divided core plates laminated in the axial direction by the fixing pins is used as a comparative example.
  • the end region from the fixed pin to the end face of the split core plate in the split core plate has a cantilever structure that is not restrained or supported.
  • the deformation in the outer diameter direction becomes larger due to the centrifugal force generated when the rotor rotates than the region where the cantilever structure is not formed.
  • the stress of the bridge portion where the wall thickness between the outer peripheral end of the split core plate and the outer diameter side of the magnet hole is relatively thin increases.
  • the bridge portion may be damaged (for example, permanent deformation). For this reason, there existed a subject that the centrifugal strength reliability of a rotor core fell.
  • the arc-shaped core plate 2a in the synchronous rotor 1 for a rotating electrical machine has a region B (hatched portion in FIG. 2) from the weld joint portion 11 (joint portion) to the end portion 2PE of the core plate 2a. ) Is a cantilever structure, and a configuration having a notch 6 in the region B where the cantilever structure is adopted. That is, the mass of the region B having a cantilever structure is reduced.
  • the notch 6 is provided at both ends 2PE and 2PE of the inner peripheral surface 2IP of the core plate 2a in the region B, thereby reducing the centrifugal force generated at both ends 2PE and 2PE of the core plate 2a. Is done.
  • the deformation due to the centrifugal force in the outer diameter direction of both end portions 2PE, 2PE of the core plate 2a can be suppressed to be small, and an increase in the stress of the bridge portion C (FIG. 2) can be suppressed. Therefore, the centrifugal strength reliability of the rotor core 2 can be improved when the rotor rotates.
  • both end portions 2PE and 2PE of the inner peripheral surface 2IP of the core plate 2a are notched, when the rotor core 2 is manufactured, the end portion 2PE of the inner peripheral surface 2IP of the core plate 2a is changed from the inner peripheral surface 2IP of the rotor core 2 to the core plate 2a. Since the amount of protrusion protruding toward the (inner peripheral side end) is reduced, it is possible to suppress an increase in inner diameter variation. For this reason, the dimensional quality of the rotor core 2 can be improved.
  • the notch 6 is predetermined in the outer diameter direction from the inner peripheral surface 2IP of the core plate 2a in the region A from the offset position 2FS to the end surface 2EF of the core plate 2a in the region B having the cantilever structure.
  • the structure set to the shape of notch depth PD cutout (shape of the cutout portion 6) was adopted. That is, the mass of the region B having a cantilever structure is reduced. For this reason, the centrifugal force generated when the rotor rotates is reduced as compared with the case where the shape of the notch 6 is not set. Therefore, at the time of rotor rotation, the deformation
  • a synchronous rotor 1 for a rotating electrical machine comprising a cylindrical rotor core 2 formed by laminating a plurality of arc-shaped core plates 2a, and a permanent magnet 3 embedded in the rotor core 2.
  • a joint welded joint 11
  • the arc-shaped core plate 2a cuts both ends 2PE and 2PE of the inner peripheral surface 2IP of the core plate 2a avoiding the magnet hole 3a opened on the outer peripheral side of the plate and the portion serving as the joint (welded joint 11). And a cutout portion 6 that is lacking. For this reason, the centrifugal strength reliability of the rotor core 2 can be improved during the rotation of the rotor.
  • the arc-shaped core plate 2a has a welded portion 5 formed at the inner peripheral edge of the plate,
  • the joint (weld joint 11) is a weld joint formed by welding and joining linear continuous welds 10 continuously formed by welds 5 between a plurality of core plates 2a stacked in the rotor axial direction.
  • the notch 6 has a region A from the offset position 2FS offset from the welded portion 5 to the circumferential end surface side of the core plate 2a to the end surface 2EF of the core plate 2a in the outer diameter direction from the inner peripheral surface 2IP of the core plate 2a.
  • the depth of PD was set to a notched shape.
  • Example 2 is a modification of the notch 6. Based on FIG. 7, the configuration of the main part of the second embodiment will be described below.
  • the notch 6 has a shape (shape of the notch 6) in which the notch depth in the outer diameter direction gradually increases from the offset position 2FS toward the end surface 2EF of the core plate 2a.
  • the shape of the notch 6 is a curved surface as shown in FIG. 7 is not limited to the curved shape as shown in FIG. 7, and may be a curved shape different from that shown in FIG. 7 or a linear shape as shown in FIG. In short, this shape should just be set to the shape which the notch depth to an outer-diameter direction becomes deep gradually as it goes to the end surface 2EF of the core plate 2a from the offset position 2FS. Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.
  • Example 2 as shown in FIG. 7, the notch depth in the outer diameter direction gradually increases as the notch 6 moves from the offset position 2FS toward the end surface 2EF of the core plate 2a.
  • the setting configuration was adopted for the shape (the shape of the notch 6). That is, in the region B having the cantilever structure, the mass reduction of the core plate 2a increases as it goes toward the end surface 2EF of the core plate 2a. Thereby, at the time of rotor rotation, centrifugal force is effectively reduced as it goes from the offset position 2FS toward the end surface 2EF of the core plate 2a as compared with the case where the shape of the notch 6 is not set.
  • the notch portion 6 was set to have a shape in which the notch depth in the outer diameter direction gradually increased from the offset position 2FS toward the end surface 2EF of the core plate 2a. For this reason, at the time of rotor rotation, the deformation
  • Example 3 is a modification of the core plate 2 a, the welded part 5, and the cutout part 6. Based on FIG. 10, the configuration of the main part of the third embodiment will be described below.
  • the arc-shaped core plate 2a is formed by an outer peripheral side arc 21a as an outer periphery thereof and an offset arc 22 as an inner periphery thereof.
  • the outer peripheral arc 21a is an arc centered on the center point O1 (reference center point) of the core plate 2a as shown in FIG.
  • the center point O1 is the same as the center point O of the first embodiment.
  • the offset arc 22 will be described as follows with reference to FIG. First, a core plate formed of a concentric outer circumferential arc 21a and inner circumferential arc 21b (a chain line in FIG. 10) centered on the center point O1 is defined as a reference core plate 21. As shown in FIG. 10, the radius of the outer circumferential arc 21a is the reference outer radius R1, and the radius of the inner arc 21b is the reference inner radius R2. Next, a center point O1 is placed on an extension line EL that extends a straight line L1 (dashed line) connecting the center point O1 and the center point 21b1 (circumferential center) of the inner circular arc 21b beyond the center point O1. The center point offset from is set as the offset center point O2.
  • a straight line L2 (dashed line) connecting the offset center point O2 and the circumferential center point 21b1 of the inner circumference side arc 21b is set as an offset radius R3 (radius) from the circumferential center point 21b1 of the inner circumference side arc 21b to the reference core.
  • An arc extending in the circumferential direction up to both end faces 21 EF of the plate 21 is defined as an offset arc 22.
  • the radius of curvature of the offset arc 22 is larger than the radius of curvature of the inner circumference side arc 21b, and the offset arc 22 has an end face of the core plate 2a from the circumferential center point 21b1 of the inner circumference side arc 21b rather than the inner circumference side arc 21b. As it goes to 2EF, it approaches the outer circumferential arc 21a.
  • the welding part 5 is demonstrated as follows using FIG. 4 and FIG. Also in the third embodiment, as described in the rotor core assembling process of the first embodiment, as shown in FIG. 4, an angle is formed on the first layer core plate 2 a with respect to the first layer core plate 2 a in the rotation direction of the rotor core 2.
  • the second core plate 2b is stacked with a shift of ⁇ 2.
  • the core plate 2a of the third embodiment is formed by the outer circumferential arc 21a and the offset arc 22 Since the center points O1 and O2 are different, the welded portion 5 between the first layer core plate 2a and the second layer core plate 2b does not match in the rotor axis Ax direction. For this reason, the welding part 5 of Example 3 makes the arrangement
  • the welded portion between the first layer core plate 2a and the second layer core plate 2b are formed at positions where the convex portions 5b coincide with each other in the rotor axis Ax direction.
  • the circumferential direction of the core plate 2 a is formed such that a continuous linear welded portion 10 is formed by the welded portions 5 between the plurality of core plates 2 a stacked in the rotor axis Ax direction.
  • the convex portions 5b on the center side and the circumferential end surface side are arranged at different positions.
  • the shape of the convex part 5b is formed in the triangle shape similarly to Example 1 (refer FIG. 2 of Example 1).
  • the concave surface 5a of the welded portion 5 is formed in accordance with the convex portions 5b on the circumferential end surface side and the circumferential central side of the core plate 2a. That is, as shown in FIG. 10, the concave surface 5a is formed so as to be deeply recessed in the outer diameter direction from the inner peripheral surface 2IP of the core plate 2a on the central side in the circumferential direction rather than the end surface side in the circumferential direction of the core plate 2a. Yes.
  • the shapes of these concave surfaces 5a are formed into curved shapes having different depths (see FIG. 2 of Example 1).
  • the notch 6 is set in a shape (shape of the notch 6) cut from the reference core plate 21 in the outer diameter direction from the inner circumferential arc 21 b to the offset arc 22.
  • the shape of the notch 6 is set to a shape in which the notch depth in the outer diameter direction is gradually increased from the offset position 2FS toward the end surface 2EF of the core plate 2a.
  • the end face yoke width W2 between the outer peripheral arc 21a and the offset arc 22 on the end face 2EF of the core plate 2a is smaller than the yoke width W1. Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.
  • the cutout portion 6 is cut out from the reference core plate 21 from the inner circumferential side arc 21 b to the offset arc 22 in the outer diameter direction (the cutout portion 6 of the cutout portion 6.
  • the configuration set to (shape) was adopted. That is, in the region B having a cantilever structure, the mass reduction of the core plate increases from the offset position 2FS toward the end surface 2EF of the core plate 2a. Thereby, at the time of rotor rotation, centrifugal force is effectively reduced as it goes from the offset position 2FS toward the end surface 2EF of the core plate 2a as compared with the case where the shape of the notch 6 is not set.
  • a core plate formed of an outer peripheral arc 21a and an inner arc 21b that are concentric with the reference center point (center O1) as the center is defined as a reference core plate 21.
  • the center point offset from the reference center point (center point O1) is defined as the offset center point O2
  • Examples 1 to 3 show an example in which four magnet holes 3a and four welds 5 are formed at equal intervals in the configuration of one core plate 2a.
  • the configuration of one core plate 2a is not limited to the configurations shown in the first to third embodiments.
  • each of the magnet holes 3a and the welded portions 5 only needs to be formed at equal intervals, and may be formed in less or more than four.
  • Examples 1 to 3 show an example in which the number of core plates 2a constituting each layer is three.
  • the number of core plates 2a constituting each layer is not limited to the configuration shown in the first to third embodiments.
  • the number of core plates 2a constituting each layer may be less or more than three.
  • the angle ⁇ 1 and the angle ⁇ 2 of the arc are changed according to the number of core plates 2a constituting each layer.
  • Example 1 to 3 an example in which the angle ⁇ 2 is set to 30 ° and shifted counterclockwise is shown.
  • the angle ⁇ 2 is not limited to the configuration shown in the first to third embodiments.
  • the next layer may be laminated so as to straddle the joint between the core plates 2a of the previous layer, and therefore the angle does not have to be 30 °.
  • Examples 1 to 3 an example is shown in which the shape of the magnet hole 3a is formed in a rectangular shape spreading in the circumferential direction, and the number thereof is one on the same axis of the radial axis CL.
  • the shape and number of the magnet holes 3a are not limited to the configurations shown in the first to third embodiments.
  • the shape may be an elliptical shape, a rhombus shape, a trapezoidal shape, or the like, and the number thereof may be two or more holes per one radial axis CL.
  • Examples 1 to 3 an example is shown in which the concave surface 5a of the welded portion 5 is formed into a curved surface, and the shape of the convex portion 5b is formed into a triangular shape.
  • the shapes of the concave surface 5a and the convex portion 5b of the welded portion 5 are not limited to the configurations shown in the first to third embodiments.
  • the concave surface 5a may be a flat surface or a shape that combines a curved surface and a flat surface.
  • the convex part 5b may be circular, elliptical, rectangular, rhombus or trapezoidal.
  • Examples 1 to 3 show an example in which the region B from the weld joint 11 (joint portion) to the end 2PE of the core plate 2a is cantilevered by welding.
  • the configuration is not limited to those shown in the first to third embodiments.
  • a caulking structure may be employed to form a coupling portion, and the region B from the coupling portion to the end 2PE of the core plate 2a may be a cantilever structure.
  • the coupling portion is not limited to welding or caulking.
  • the rotor shaft 4 is press-fitted into the rotor core 2 so that the rotor shaft 4 is fitted to the rotor core 2.
  • the configuration is not limited to those shown in the first to third embodiments.
  • general key engagement may be used in addition to press-fitting. That is, one or several key grooves may be formed on the inner peripheral surface 2IP of the rotor core 2 and the outer peripheral surface of the rotor shaft 4, and a key may be inserted into the key groove to prevent rotation.
  • the rotor core 2 is formed of a plurality of core plates 2a, it is preferable to prevent rotation by key engagement rather than press-fitting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

L'invention concerne un rotor synchrone de machine électrique tournante dans lequel la fiabilité de résistance à la force centrifuge d'un noyau de rotor peut être améliorée. Le rotor synchrone de machine électrique tournante (1) est équipé : d'un noyau de rotor cylindrique (2) formé par empilement d'une pluralité de plaques de noyau en forme d'arc de cercle (2a) ; et d'aimants permanents (3) encastrés dans le noyau de rotor (2). Des parties joint (parties joint soudé (11)) destinées à joindre les unes aux autres les plaques de noyau en forme d'arc de cercle (2a) empilées dans la direction d'un axe de rotor (Ax) sont disposées sur un côté circonférentiel intérieur du noyau de rotor (2), et les plaques de noyau en forme d'arc de cercle (2a) comportent des trous d'aimants (3a) ouverts sur un côté circonférentiel extérieur des plaques, et des parties encoche (6) formées par encochage des deux extrémités (2PE, 2PE) d'une surface circonférentielle intérieure (2IP) des plaques de noyau (2a) tout en évitant des parties qui deviennent les parties joint (parties joint soudé (11)).
PCT/JP2014/066585 2014-06-23 2014-06-23 Rotor synchrone de machine électrique tournante WO2015198382A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2014/066585 WO2015198382A1 (fr) 2014-06-23 2014-06-23 Rotor synchrone de machine électrique tournante
JP2016528775A JP6656149B2 (ja) 2014-06-23 2014-06-23 回転電機用同期ロータ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/066585 WO2015198382A1 (fr) 2014-06-23 2014-06-23 Rotor synchrone de machine électrique tournante

Publications (1)

Publication Number Publication Date
WO2015198382A1 true WO2015198382A1 (fr) 2015-12-30

Family

ID=54937520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/066585 WO2015198382A1 (fr) 2014-06-23 2014-06-23 Rotor synchrone de machine électrique tournante

Country Status (2)

Country Link
JP (1) JP6656149B2 (fr)
WO (1) WO2015198382A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109155555A (zh) * 2016-05-20 2019-01-04 Zf腓特烈斯哈芬股份公司 电机的具有叠片组的转子
WO2019111414A1 (fr) * 2017-12-08 2019-06-13 日産自動車株式会社 Noyau de rotor pour machine électrique tournante et procédé de fabrication de noyau de rotor pour machine électrique tournante
CN111600406A (zh) * 2019-02-20 2020-08-28 罗伯特·博世有限公司 电机的转子以及具有这种转子的电机
JPWO2020249994A1 (fr) * 2019-06-14 2020-12-17

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009060738A (ja) * 2007-08-31 2009-03-19 Honda Motor Co Ltd 回転電機
JP2011229312A (ja) * 2010-04-21 2011-11-10 Mitsui High Tec Inc 積層鉄心

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4881118B2 (ja) * 2006-09-29 2012-02-22 本田技研工業株式会社 ロータコアの製造方法
JP2013116010A (ja) * 2011-11-30 2013-06-10 Aisin Aw Co Ltd 回転電機のロータコア

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009060738A (ja) * 2007-08-31 2009-03-19 Honda Motor Co Ltd 回転電機
JP2011229312A (ja) * 2010-04-21 2011-11-10 Mitsui High Tec Inc 積層鉄心

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109155555A (zh) * 2016-05-20 2019-01-04 Zf腓特烈斯哈芬股份公司 电机的具有叠片组的转子
CN109155555B (zh) * 2016-05-20 2020-11-13 Zf腓特烈斯哈芬股份公司 电机的具有叠片组的转子
WO2019111414A1 (fr) * 2017-12-08 2019-06-13 日産自動車株式会社 Noyau de rotor pour machine électrique tournante et procédé de fabrication de noyau de rotor pour machine électrique tournante
JPWO2019111414A1 (ja) * 2017-12-08 2020-10-22 日産自動車株式会社 回転電機の回転子鉄心、及び、回転電機の回転子鉄心の製造方法
EP3723241A4 (fr) * 2017-12-08 2020-12-09 Nissan Motor Co., Ltd. Noyau de rotor pour machine électrique tournante et procédé de fabrication de noyau de rotor pour machine électrique tournante
CN111600406A (zh) * 2019-02-20 2020-08-28 罗伯特·博世有限公司 电机的转子以及具有这种转子的电机
JPWO2020249994A1 (fr) * 2019-06-14 2020-12-17
WO2020249994A1 (fr) * 2019-06-14 2020-12-17 日産自動車株式会社 Rotor et procédé de fabrication de rotor
JP7188588B2 (ja) 2019-06-14 2022-12-13 日産自動車株式会社 ロータ、及び、ロータの製造方法

Also Published As

Publication number Publication date
JP6656149B2 (ja) 2020-03-04
JPWO2015198382A1 (ja) 2017-04-20

Similar Documents

Publication Publication Date Title
JP5971418B2 (ja) 回転電機用同期ロータと回転電機用同期ロータの製造方法
JP6274475B2 (ja) 回転子、回転電機および回転子の製造方法
JP2013150479A (ja) 分割式コアを有する電動機の回転子及びその製造方法
JP5716377B2 (ja) 回転電機
WO2017061305A1 (fr) Stator et machine électrique rotative
WO2015198382A1 (fr) Rotor synchrone de machine électrique tournante
CN112119572B (zh) 旋转电机的转子以及旋转电机的转子芯支承构造
US9899885B2 (en) Rotor and rotating electric machine
JP2009060738A (ja) 回転電機
JP2007228720A (ja) コア
JP6926874B2 (ja) ロータ
EP3723241B1 (fr) Noyau de rotor pour machine électrique tournante et procédé de fabrication de noyau de rotor pour machine électrique tournante
JP2005312153A (ja) 永久磁石式回転子とその製造方法
CN113454877B (zh) 定子芯部和马达
JP2012249354A (ja) 回転電機の回転子
JP7188588B2 (ja) ロータ、及び、ロータの製造方法
WO2018105046A1 (fr) Machine électrique rotative de type à aimant permanent
JP2009106022A (ja) 回転電機および回転電機の製造方法
JP6745212B2 (ja) 回転子およびリラクタンス回転電機
JP6594143B2 (ja) ステータおよびステータの製造方法
JP6176379B2 (ja) 永久磁石式回転電機
JP2016201870A (ja) 回転電機のロータ及びその製造方法
WO2024095945A1 (fr) Rotor pour une machine électrique tournante
JP2014096869A (ja) 磁石埋込型モータの回転子
JP2018007380A (ja) 回転電機

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14896152

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016528775

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14896152

Country of ref document: EP

Kind code of ref document: A1