WO2017090189A1 - 回転電機 - Google Patents
回転電機 Download PDFInfo
- Publication number
- WO2017090189A1 WO2017090189A1 PCT/JP2015/083416 JP2015083416W WO2017090189A1 WO 2017090189 A1 WO2017090189 A1 WO 2017090189A1 JP 2015083416 W JP2015083416 W JP 2015083416W WO 2017090189 A1 WO2017090189 A1 WO 2017090189A1
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- WIPO (PCT)
- Prior art keywords
- magnet
- rotor
- teeth
- rotating electrical
- electrical machine
- Prior art date
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Classifications
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
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- 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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
- H02K21/227—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos having an annular armature coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
Definitions
- the present invention relates to a rotating electrical machine.
- the smaller and more efficient rotating electrical machine can be obtained as the magnet's magnetic force is stronger.
- the magnet when the magnetic force of the magnet is increased, when the magnet is assembled to the rotor, the magnet may jump to the rotor body made of a magnetic material by an attractive force and break.
- the working posture becomes unstable.
- the magnet and the stator are arranged facing each other with a minute gap distance.
- the iron core of the stator is always attracted by the magnetic force of the magnet. Therefore, when repairing or maintaining a rotating electrical machine, it is necessary to disassemble and reassemble the rotor and stator while resisting strong magnet attraction.
- workability is not only poor, but also the work period and work cost increase.
- the rotating electrical machine becomes larger, the rotor and the stator become larger, and the number and size of the magnets increase, so that the problem of assembling work as described above appears more remarkably.
- Patent Document 1 the outer peripheral portion of the rotor is made into a separate part as a rotor core, a magnet is assembled to this, and the separated rotor core is used with a key, a nut, and a bolt.
- a structure for fastening to the rotor body is proposed.
- the assembly work of the magnet can be performed on the rotor core that is smaller than the rotor body, so that the assembly workability of the rotor is improved and only the rotor core from the rotor after assembly is completed. Since it can be removed, the effect of facilitating repair work is obtained.
- the material yield deteriorates because the rotor core, which is a separate part, has an arc shape.
- the rotor core has an arc shape
- the jig and work for fixing the posture of the rotor core at the time of magnet assembly work become complicated, and the work of assembling the magnet on the circumferential surface is a conventional one-piece structure. Since the working posture is unstable, the assembly workability is poor.
- the present invention has been made in view of the above, and an object of the present invention is to obtain a rotating electrical machine having a rotor structure with good productivity and maintainability in the rotating electrical machine.
- a rotating electrical machine of the present invention includes a rotor and a stator, and the rotor is at least one magnet disposed on a rotor body and an outer peripheral portion of the rotor body.
- the magnet unit has a plurality of magnet teeth divided in the circumferential direction, and the plurality of magnet teeth constituting one magnet unit are arranged in an arc shape,
- a magnet is attached to the magnet teeth, and with respect to one magnet unit, at least a pair of the magnet teeth is provided with a notch, and the plurality of magnet teeth are arranged in an arc shape,
- a fixed block is press-fitted into the pair of notches, and the fixed block is fastened to the rotor body in a state where the fixed block is inserted into the notches.
- a rotating electrical machine having a rotor structure with good productivity and maintainability can be obtained.
- Embodiment 1 of this invention It is a top view of the rotary electric machine in Embodiment 1 of this invention. It is a principal part enlarged view of the rotor of FIG. It is a linear state figure of the magnet unit provided in the outer peripheral part of the rotor of FIG. It is a principal part enlarged view of the magnet unit of the linear state shown in FIG. It is a perspective view of the magnet unit of the linear state shown in FIG. It is a figure which shows the fixed block for fastening a magnet unit and a rotor main body. It is a figure which shows another form of the magnet unit of Embodiment 1 of this invention. It is a principal part enlarged view when the magnet unit of FIG. 7 is assembled
- FIG. 13 It is a perspective view for showing another method of disassembling and assembling the magnet unit attached to the outer peripheral part of the rotor of FIG. It is a figure explaining the material removal when pressing a magnet unit. It is a top view of the rotor in Embodiment 2 of this invention. It is a principal part enlarged view of the rotor of FIG. It is a linear state figure of the magnet unit provided in the outer peripheral part of the rotor of FIG. It is a principal part enlarged view of the magnet unit of the linear state shown in FIG. 13 regarding a 1st core piece. It is a principal part enlarged view of the magnet unit of the linear state shown in FIG. 13 regarding a 2nd core piece.
- Embodiment 3 of the present invention It is a linear state figure of a part of magnet unit provided in the perimeter part of a rotor in Embodiment 3 of the present invention. It is a 1st modification of the magnet unit of FIG. It is a 2nd modification of the magnet unit of FIG. It is the figure which added the convex shape to the long hole of Embodiment 3 of this invention. It is a figure explaining another form of Embodiment 2 of this invention. It is the figure which showed the structure of FIG. 20A seeing from a different angle. In all the embodiments of the present invention, it is a figure explaining the form which attaches a plurality of magnets to one magnet tooth. It is a figure explaining application to an IPM rotor in all the embodiments of the present invention.
- FIG. 1 is a plan view of a rotating electrical machine according to Embodiment 1 of the present invention, and is a view showing a rotor taken out from a stator for easy understanding.
- FIG. 2 is an enlarged view of a main part of the rotor 11 shown in FIG.
- the rotating electrical machine 8 that is an inner rotor type includes a stator (armature) 5 and a rotor 11. On the outer peripheral side of the rotor 11, the stator 5 is fixed independently of the rotor 11. A rotor 11 is fixed to the rotating shaft 4 on the inner peripheral side of the stator 5, and a plurality of magnets 3 are arranged on the outer peripheral surface of the rotor main body 12 (the surface facing the stator 5). It is assembled and fixed at regular intervals.
- the stator 5 includes a stator core 6, a coil 7, and an insulator (not shown in the figure) interposed between them.
- the insulator is made of, for example, insulating paper, resin parts, or the like.
- the stator core 6 is provided with a plurality of grooves (slots) 9 for accommodating the coils 7 on the inner peripheral side facing the rotor 11, and the inner diameter direction of the stator core 6 sandwiched between two slots.
- the rotor 11 includes a rotor main body 12 fixed by the rotation shaft 4 and a plurality of magnet units 16. Each of the plurality of magnet units 16 has a magnet 13. Each of the plurality of magnet units 16 is a component divided from the other magnet units 16. The magnet 13 is assembled on the outer peripheral side of the corresponding magnet unit 16. The plurality of magnet units 16 are fastened and fixed to the rotor body 12 with bolts 17.
- the rotor 11 shown in FIG. 1 has four magnet units 16a to 16d each divided into four equal parts in the circumferential direction.
- the magnet unit 16 is composed of a plurality of magnet teeth 14, and a magnet 13 is assembled on the outer peripheral side of each magnet tooth 14 by bonding or the like.
- FIG. 3 is a diagram when the magnet unit 16 is expanded linearly.
- FIG. 4 is an enlarged view of the periphery of the magnet teeth 14a to 14c in the magnet unit 16 shown in FIG.
- one magnet unit 16 is composed of ten magnet teeth 14a to 14j, and adjacent magnet teeth are connected by a bridging portion 18 that is thinly connected on the outer peripheral side.
- the magnet 34 is bent around the bridging portion 18 and the surfaces 34 of adjacent magnet teeth 14 come into contact with each other, thereby forming one magnet unit (one magnet teeth coupling body) in which a plurality of magnet teeth 14 are arranged in an arc. .
- a press-fitting portion 20 is provided.
- the press-fit portion 20 is composed of a concave shape 25 on one side end face of the magnet teeth 14 and a convex shape 26 on the other end face of the magnet teeth 14 adjacent to one side of the concave shape.
- the convex shape 26 is press-fitted into the concave shape 25 when closing in the direction, it can be fitted and fixed.
- the force with which the adjacent magnets 13 are attracted helps the magnet unit 16 to be stabilized in the arc shape.
- FIG. 5 shows a magnet unit 16 made of laminated steel sheets.
- the fixed block 15 is assembled to the magnet unit 16, and the fixed block 15 and the rotor body 12 are fixed with bolts 17 or the like.
- FIG. 6 shows the fixed block 15.
- two screw holes 28 are provided.
- a part of the magnet teeth 14 of the magnet unit 16 is provided with a notch 31 in the shape of a fixed block between the adjacent magnet teeth 14.
- the fixing block 15 is inserted from the side surface of the magnet teeth 14, and when the magnet unit 16 is bent in the direction of the arrow 24 around the bridging portion 18, the space between the magnet teeth 14 is closed.
- the fixed block 15 is sandwiched and fixed between the magnet teeth 14.
- the fixed block 15 has protrusions 22 on the left and right sides, and is pressed into the stepped portion 23 of the notch 31 when the space between the magnet teeth 14 is closed.
- the fixing block 15 can be fixed to the magnet unit without requiring operations such as welding and bolt fastening.
- the notches 31 are provided between the magnet teeth 14a and 14b and between the 14i and 14j.
- the notch 31 should just be provided in at least one pair of magnet teeth regarding one magnet unit.
- the magnet unit 16 is assembled from the outer diameter side of the rotor body 12 as indicated by an arrow 21.
- the rotor body 12 is provided with a notch 19a, and the fixed block 15 is inserted into the notch 19a.
- one side surface of the notch 19a is open toward the center of the magnet unit 16. That is, the side surface of the notch 19a closer to the center of the corresponding magnet unit 16 is inclined toward the center of the corresponding magnet unit toward the opening side of the notch (outward in the radial direction).
- Each of the magnet units 16a to 16d has two fixing blocks 15a and 15b, and one side surface of one fixing block 15a abuts the side surface of the corresponding notch 19a that is not inclined, When one side surface of the other fixed block 15a (one side surface of the one fixed block 15a and the side surface opposite in the circumferential direction) and the side surface of the corresponding notch 19a that is not inclined contact, The stator main body 12 and the magnet unit 16 can be positioned.
- two fixed blocks 15 are used for one magnet unit 16, but two or more fixed blocks 15 may be used, and two of the plurality of fixed blocks 15 may be used. It is possible to use the same positioning as described above.
- one fixed block 15c may be used for one magnet unit 16, and the magnet unit 16 is assembled to the stator body 12 along the protruding direction of the fixed block 15c.
- the groove of the rotor main body 12 is shaped so as to match the protruding portion of the fixed block 15c as shown in the notch 19b of FIG. 8, and the protruding portion of the fixed block 15c also serves as a key.
- the unit 16 can be positioned.
- one fixed block 15 c is arranged at the center of the corresponding magnet unit 16.
- the magnet unit 16 and the stator body 12 can be positioned without the need for preparing a positioning component such as a key separately.
- a pin hole 29 may be provided in the fixed block 15, and a corresponding pin hole may be provided in the notches 19a and 19b.
- FIG. 9 shows another disassembly / assembly method of the magnet unit 16.
- the magnet unit 16 can be assembled and removed so as to slide from the axial length direction of the rotor body 12.
- the magnet unit 16 is disassembled / re-mounted independently of the rotor body 12, the rotating shaft 4, and the stator 5. Can be assembled.
- the fitting groove shape of the rotor body 12 has a side surface like the notch 19b.
- a shape that is not open can be adopted, and the magnet unit 16 and the rotor body 12 can be positioned by any one of the plurality of fixed blocks 15.
- the assembly work of the magnets 13 may be performed for each magnet unit 16. Further, since the magnet unit 16 can be in a straight line state in which the magnet assembly surfaces are arranged in a line, the magnet assembly operation can be easily performed. In addition, since the magnet block 16 can be positioned and fastened simultaneously by the fixed block 15, it is not necessary to prepare separate parts such as a key. Further, the assembly of the fixed block 15 and the magnet unit 16 can be performed only by press-fitting work. Since a bolt fastening operation or the like is not required, the rotor main body 12 and each magnet unit 16 can be assembled with high accuracy and easily. Thereby, the operating characteristics of the rotating electrical machine 8 can be improved.
- the rotor 11 can individually disassemble and reassemble each magnet unit 16 without disassembling the rotating electrical machine 8, repair and maintenance work can be simplified and the construction period and cost can be reduced.
- the material yield can be improved because the material can be taken in a linear layout with respect to the steel plate 33 as shown in FIG.
- the surface accuracy of the magnet assembly surface, the surface accuracy of the assembly surface with the rotor body 12, and the roundness of the magnet unit 16 when it is formed into an arc shape can be easily secured.
- the child can be manufactured at low cost.
- FIG. A second embodiment of the present invention will be described with reference to FIGS.
- parts other than those described below are the same as those in the first embodiment described above.
- the reference numerals indicating the parts that are not particularly described below and that correspond to the above-described embodiments are indicated by using the same numerals in the last two digits.
- FIG. 11 is a plan view of the rotor 101 according to the second embodiment of the present invention
- FIG. 12 is an enlarged view of a main part of the rotor 101.
- the rotor 101 includes a rotor body 112 fixed to the rotating shaft 4, and a plurality of magnet units 116 (four magnet units 116a to 116d as an example).
- Each of the plurality of magnet units 116 includes a magnet 113.
- Each of the plurality of magnet units 116 is a component that is divided from the other magnet units 116.
- the magnet 113 is assembled on the outer peripheral side of the corresponding magnet unit 116.
- the plurality of magnet units 116 are fastened and fixed to the rotor body 112 by bolts 117.
- the protruding portion of the fixed block 115 is fitted and positioned with a groove 119 provided in the rotor body 112.
- FIG. 13 is a diagram when the magnet unit 116 is expanded linearly.
- FIG. 14 is an enlarged view of a main part of the linear magnet unit 116 shown in FIG. 13 with respect to the first core piece.
- FIG. 15 is an enlarged view of a main part of the magnet unit 116 in the linear state shown in FIG. 13 with respect to the second core piece.
- Adjacent magnet teeth 114 are not connected by a bridging portion, and individual magnet teeth 114 are connected through the following configuration from a state in which they can be completely separated from each other.
- the magnet unit 116 is formed by connecting a plurality of magnet teeth 114 with joints 118. In the present embodiment, ten magnet teeth 114 are connected to the magnet unit 116.
- a magnet 113 is assembled on the outer peripheral side of each magnet tooth 114.
- the magnet teeth 114 are formed by thin steel plate lamination, and the magnet teeth 114 include at least a first type magnet teeth 114 and a second type magnet teeth 114.
- the first type of magnetic teeth 114 has a shaft portion 140 at the protruding portion 141 on one end face in the circumferential direction.
- the second type magnet tooth 114 has a shaft portion 142 at the protruding portion 143 on the other end surface in the circumferential direction.
- the magnet unit 116 is configured by fitting the shaft portion 140 of the first type magnet teeth 114 and the shaft portion 142 of the second type magnet teeth 114 together. This will be described in more detail by taking a part as an example. In FIG.
- the steel sheet layer in which the first type magnet teeth 114 are arranged side by side is seen as a layer on the outermost surface of the paper.
- the shaft part 140 of the second type magnet tooth 114 hidden behind the magnet tooth 114b adjacent to the magnet tooth 114a (the back side of the drawing) is fitted to the shaft part 140 of the first type magnet tooth 114a.
- the shaft portion 140 and the shaft portion 142 are formed by press working, and the front side of the shaft portion functions as a convex portion, and the back side of the shaft portion functions as a concave portion.
- the adjacent magnet teeth 114 can rotate with each other around the shaft portion 140 of the first type magnet teeth 114 and the shaft portion 142 of the second type magnet teeth 114 fitted together.
- the magnet teeth 114 can be rotated in the direction in which the interval between the magnet teeth 114 opens, that is, in the direction opposite to the arrow 124, until the surface 144 contacts. Since the adjacent magnets 113 have opposite magnetic poles, they try to attract each other. However, since the abutment surface 144 serves as a stopper, the magnets do not come into contact with each other by the rotation operation around the joint 118.
- the magnet teeth 114 can be rotated until the surface 145 contacts in the direction in which the interval between the magnetic teeth 114 is narrowed, that is, in the direction of the arrow 124.
- the adjacent magnet teeth 114 can be arranged in an arc shape. Thereby, the magnet unit 116 can be easily deformed from the linear state of FIG. 13 to the arc state.
- the adjacent magnet 113 When the joint 118 of the magnet teeth 114 is rotated in the direction of the arrow 124, the adjacent magnet 113 also exerts an attractive force in a direction in which the space between the magnet teeth 114 is narrowed. Therefore, although the magnet teeth 114 are stable in a posture arranged in an arc shape, the magnet unit 116 can be stably held in an arc shape by using the press-fitting shape 120 as in the first embodiment of the present invention. Can do.
- FIG. 3 A third embodiment of the rotor of the present invention will be described with reference to FIGS.
- the third embodiment is the same as the first or second embodiment described above except for the parts described below. Note that the reference numerals indicating the parts that are not particularly described below and that correspond to the above-described embodiments are indicated by using the same numerals in the last two digits.
- FIG. 16 is a partial plan view of magnet unit 216 according to Embodiment 3 of the present invention
- FIG. 17 is a partial plan view of magnet unit 216 in a first modified state
- FIG. 18 is a second modified state of magnet unit 216. The partial top view of is shown.
- the magnet unit 216 is configured by connecting a plurality of magnet teeth 214, and a joint 218 is provided at the connecting portion.
- the magnet teeth 214 are formed by thin steel plate lamination, and the magnet teeth 214 include a third type magnet teeth 214 and a fourth type magnet teeth 214.
- the third type magnet tooth 214 has a long hole 235 in the protruding portion 231 on one end face in the circumferential direction.
- the fourth type of magnet teeth 214 has a shaft portion 234 at the protruding portion 232 on the other end surface in the circumferential direction.
- the elongated hole 235 of the third type magnet teeth 214 and the shaft portion 234 of the fourth type magnet teeth 214 are fitted together.
- the adjacent magnet teeth 214 can have the shaft portion 234 slid along the elongated hole 235 in the direction of the arrow in FIG. 17, and can take a wide expansion position and a narrow reduction position between the adjacent magnet teeth 214.
- the third type magnet teeth 214 have a concave shape 233 on the other side end surface of the third type magnet teeth 214 adjacent to one side of the protrusion 231 in order to avoid interference with the protrusion 231 when in the contracted position. Is provided.
- the fourth type magnet teeth 214 also have a fourth type of magnet teeth 214 adjacent to the other side of the protrusion 232 in order to avoid interference with the protrusion 232 at the contracted position.
- a similar concave shape is provided on one end face. Further, the adjacent magnet teeth 214 can rotate in the direction of the arrow in FIG.
- the elongated hole region is divided into an enlarged position 238 and a reduced position 239.
- the shaft portion 234 can be in a press-fitted state while moving from the enlarged position 238 to the reduced position 239 along the elongated hole 235, and can be released from the press-fitted state at the reduced position 239.
- the shaft portion 234 is prevented from unintentionally returning from the reduced position 239 to the enlarged position 238 due to the convex shape 237, so that the shaft portion 234 is positioned at the reduced position 239 and can be rotated more stably at the reduced position 239. become.
- the magnet 213 has a smaller and more efficient rotating electrical machine 8 as the magnetic force is stronger.
- the adjacent magnets 213 attract each other with a strong magnetic force. Sexuality gets worse.
- the adjacent magnet teeth 214 can take an enlarged position, when assembling the magnet 213, the work can be performed at a position away from the adjacent magnet 213, and workability is improved.
- the joint 218 is slid to the reduced position, or when the joint 218 is rotated to have an arc shape as shown in FIG. 18, the pulling force between the adjacent magnets 213 helps, and after deformation Since the posture of the magnet unit 216 is also stable, the deformation work of the magnet unit 216 is easy. That is, a rotor structure with good workability can be obtained.
- the magnetic teeth 114 and 214 are formed of laminated steel plates. However, as shown in FIGS. 20A and 20B, the magnetic teeth 114 and 214 are manufactured from the block material by wire cutting or cutting. You can also. As an example, FIG. 20A and FIG. 20B show what produced the magnet unit of Embodiment 2 of this invention with the block material. In this case, adjacent magnet teeth 154 are not connected by the bridging portion, and are connected as follows.
- Each magnet tooth 154 is provided with a first hole 155 having a circular shape instead of the shaft portion 140 in the protruding portion 150 on one side end surface, and a connecting portion (protruding portion / relative protrusion) on the other end surface of the adjacent magnet teeth 154.
- Part) 151 is provided with a second hole 156 having a circular shape having the same diameter as the first hole 155 instead of the shaft part 142, and the pin 152 is press-fitted and connected to the first hole 155 and the second hole 156, Similarly, a structure in which the adjacent magnet teeth 154 can rotate around the joint 158 can be obtained, and the same effect as in the second embodiment of the present invention can be obtained.
- the first hole 155 provided in the protruding portion 150 is configured as the long hole 235 described above, and the pin 152 is inserted into the long hole-shaped first hole 155 and press-fitted into the second hole 156. Even if it makes it like, the effect similar to Embodiment 3 of this invention can be acquired.
- only one of the first hole 155 or the second hole 156 may be a long hole and the other may be a circular hole.
- the region of the long hole is divided into an enlarged position and a reduced position. You may do it.
- the pin 152 does not unintentionally return from the contracted position to the expanded position due to the convex shape, so that the rotation operation can be performed more stably at the contracted position. It becomes like this.
- an iron material is used for the magnet unit, but a material having a high magnetic permeability other than iron, such as copper, may be used.
- the rotor of each embodiment of the present invention is composed of four magnet units that are equally divided in the circumferential direction.
- the magnet unit may be an arbitrary number of one or more. Effects similar to those of the embodiments of the invention can be obtained.
- each magnet unit of each embodiment of this invention has the same number of magnet teeth, each magnet unit may have a structure having a different number of magnet teeth.
- the magnet unit of each embodiment of this invention was described as the connection body structure of ten magnet teeth, respectively, the structure where two or more magnet teeth were connected may be sufficient.
- the fixed block and the rotor main body are fixed by bolt fastening, but may be fixed by other fastening methods such as welding and press-fitting.
- one magnet is assembled with respect to one magnet tooth.
- a plurality of magnets 313a and 313b may be assembled to both of them.
- each embodiment of the present invention shows an SPM rotor as an example, it can also be applied to an IPM rotor in which a magnet 413 is assembled in a magnet tooth 414 as shown in FIG.
- an inner rotor type rotating electric machine in which the stator is disposed on the outer peripheral side and the rotor is disposed on the inner peripheral side is illustrated.
- the shape of the magnet units 516 and 616 such as 30, it can be applied to other types of rotating electrical machines such as an axial gap type and an outer rotor type.
- FIG. 23 to 26 show an example in which the present invention is applied to an axial gap type rotating electrical machine.
- FIG. 23 shows a side view of the axial gap type rotating electrical machine 508.
- FIG. 24 shows the linear development state of the magnet unit 516.
- FIG. 25 is a side view of the magnet unit 516 shown in FIG.
- FIG. 26 shows a view of the rotor 501 of the rotating electrical machine 508 shown in FIG. 24 as viewed from the side facing the stator 550.
- the magnet unit 516 has a structure in which a plurality of magnet teeth 514 are connected by a bridging portion 518, and the bridging portion 518 is bent so that the entire magnet unit 516 has an arc shape. To do.
- the magnet 513 is assembled
- the magnet unit 516 has a fixed block 515 fitted and fixed on the inner side thereof, and the fixed block 515 protrudes from the end surface in the axial length direction opposite to the surface on which the magnet 513 of the magnet unit 516 is assembled.
- the block 515 is fitted in a notch 519 provided in the rotor main body 512 and fastened with a bolt 517 or the like to constitute the rotor 501.
- the rotor 501 is fixed to the rotating shaft 504, and is arranged with a small gap distance in the axial direction with the stator 550 fixed independently of the rotating shaft 504 to form the rotating electrical machine 508. is doing.
- the magnet unit 516 is connected to the rotor main body 512 in the axial length direction of the rotor 501 and is disposed with a gap distance from the stator 550 in the axial length direction of the rotor 501.
- FIG. 27 to 30 show examples in which the present invention is applied to an outer rotor type rotating electrical machine.
- FIG. 27 shows a side view of the outer rotor type rotating electrical machine 608.
- FIG. 28 shows a linearly developed state of the magnet unit 616 as viewed from the side of the mounting surface with the rotor body 612.
- FIG. 29 shows a side view of the magnet unit 616 shown in FIG.
- FIG. 30 shows a view of the rotor 601 shown in FIG. 27 as viewed in the axial direction from the side of the support base 651 that supports the stator 650.
- the magnet unit 616 has a structure in which a plurality of magnet teeth 614 are connected by a bridging portion 618, and the bridging portion 618 is bent so that the entire magnet unit 616 has an arc shape.
- a magnet 613 is assembled on the inner peripheral side of each magnet tooth.
- the magnet unit 616 has a fixed block 615 fitted and fixed inside thereof, and the fixed block 615 protrudes from the outer peripheral side of the magnet unit 616, and the fixed block 615 is formed in a notch 619 provided in the rotor body 612.
- the rotor 601 is configured by being fitted and fastened with a bolt 617 or the like.
- the rotor 601 is fixed to the rotating shaft 604, and is arranged with a small gap distance in the inner circumferential direction from the stator 650 fixed independently of the rotating shaft 604, thereby forming the rotating electrical machine 608. is doing.
- the magnet unit 616 is connected to the rotor body 612 in the radial direction of the rotor 601, and is arranged with a gap distance from the stator 650 in the radial direction of the rotor 601.
- adjacent magnet teeth 514 and 614 are connected by bridging portions 518 and 618.
- a joint structure may be used instead of the bridging portions 518 and 618 as in the second and third embodiments.
- the magnet unit of the present invention may be divided into a plurality of pieces in the axial radial direction as shown in FIGS. 31 and 32, or a plurality of magnets divided in the axial radial direction.
- a step skew structure can be obtained by assembling the units 516a and 516b with respect to the rotor main body with the circumferential phase shifted.
- the magnet unit of the present invention may be divided into a plurality of pieces in the axial direction as shown in FIG. 33, or a plurality of magnets divided in the axial direction.
- a step skew structure can also be obtained by assembling the units 616a and 616b with respect to the rotor body while shifting the circumferential phase.
- the invention of the present application includes combinations of some or all of the configurations of any one or more of the embodiments described above with other embodiments.
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Abstract
Description
図1は、本発明の実施の形態1における回転電機の平面図であり、説明を分かり易くするため固定子から回転子を取り出して示した図である。また、図2は図1で示す回転子11の要部拡大図である。インナーローター型である回転電機8は、固定子(電機子)5と、回転子11とを備えている。回転子11の外周側には、固定子5が回転子11とは独立で固定されている。固定子5の内周側には回転子11が回転軸4に固定されており、回転子11の回転子本体12の外周面(固定子5との対向面)には複数の磁石3がおよそ均等な間隔で組み付け固定されている。
固定ブロックの形状をした切欠き31が設けられている。磁石ユニット16が直線状態のときに、磁石ティース14の側面から固定ブロック15を差し込み、磁石ユニット16が橋絡部18を中心に矢印24の方向に折り曲げられて磁石ティース14の間が閉じる時に、固定ブロック15が磁石ティース14に挟み込まれて固定される。固定ブロック15は左右に突起22を持ち、磁石ティース14の間が閉じる時に切欠き31の段差部23に圧入される。これにより、固定ブロック15を磁石ユニット16から外れないように、且つ磁石ティース14間が再度開かないように磁石ティース同士を拘束固定することができる。すなわち、固定ブロック15は溶接やボルト締結などの作業を必要とせず磁石ユニットに固定することができる。本実施の形態では切欠き31を、磁石ティース14a、14b間と、14i、14j間とに設けている。なお、切欠き31は、一つの磁石ユニットに関し、少なくとも一対の磁石ティースに設けられていればよい。
本発明の実施の形態2を図11~15で説明する。なお、本実施の形態2は、以下に説明した以外の部分については、上述した実施の形態1と同様であるものとする。なお、以下特に説明をしていない箇所であって、既に説明した実施の形態と対応する箇所を示す参照数字は、下二桁に同じ数字を用いて示している。
本発明の回転子の実施の形態3を図16~19で説明する。なお、本実施の形態3は、以下に説明した以外の部分については、上述した実施の形態1または2と同様であるものとする。なお、以下特に説明をしていない箇所であって、既に説明した実施の形態と対応する箇所を示す参照数字は、下二桁に同じ数字を用いて示している。
また、本発明の各実施の形態の各磁石ユニットは、全て同じ数の磁石ティースを有しているが、各磁石ユニットは異なる数の磁石ティースを有する構造であっても良い。
また、本発明の磁石ユニットは、固定ブロックと回転子本体がボルト締結により固定されているが、溶接・圧入などの他の締結方法で固定される構造であっても良い。
図23はアキシャルギャップ型回転電機508の側面図を示している。また、図24は磁石ユニット516の直線展開状態を示している。また、図25は図24で示す磁石ユニット516の側面図を示している。また、図26は図24で示す回転電機508の回転子501について、固定子550との対向面側から見た図を示している。
本発明の実施の形態1と同様に、磁石ユニット516は複数の磁石ティース514が橋絡部518で連結された構造となっており、橋絡部518を折り曲げて磁石ユニット516全体を円弧形状とする。また、各磁石ティースの軸長方向端面には磁石513が組み付けられている。さらに、磁石ユニット516はその内側に固定ブロック515が嵌合固定されおり、固定ブロック515は磁石ユニット516の磁石513が組み付けられている面と反対側の軸長方向端面側から突出しており、固定ブロック515が回転子本体512に設けられた切欠き519に嵌め合わされ、ボルト517などで締結されることで回転子501を構成している。回転子501は、回転軸504に固定されており、回転軸504とは独立して固定された固定子550と軸長方向に微小なギャップ距離を持って配置されることで回転電機508を形成している。
図27はアウターローター型回転電機608の側面図を示している。また、図28は磁石ユニット616について回転子本体612との取付け面側からみた直線展開状態を示している。また、図29は図28で示す磁石ユニット616の側面図を示している。また、図30は図27で示す回転子601について、固定子650を支持する支持台651の側から軸長方向に見たときの図を示している。
本発明の実施の形態1と同様に、磁石ユニット616は複数の磁石ティース614が橋絡部618で連結された構造となっており、橋絡部618を折り曲げて磁石ユニット616全体を円弧形状とする。また、各磁石ティースの内周側には磁石613が組み付けられている。さらに、磁石ユニット616はその内側に固定ブロック615が嵌合固定されおり、固定ブロック615は磁石ユニット616の外周側から突出しており、固定ブロック615が回転子本体612に設けられた切欠き619に嵌め合わされ、ボルト617などで締結されることで回転子601を構成している。回転子601は、回転軸604に固定されており、回転軸604とは独立して固定された固定子650と内周方向に微小なギャップ距離を持って配置されることで回転電機608を形成している。
Claims (14)
- 回転子と、固定子とを備え、
前記回転子は、回転子本体と、前記回転子本体の外周部に配置される少なくとも一つの磁石ユニットとを備え、
前記磁石ユニットは、円周方向に分割された複数の磁石ティースを有しており、
一つの前記磁石ユニットを構成する前記複数の磁石ティースは、円弧状に並んでおり、
前記磁石ティースには磁石が取り付けられており、
一つの前記磁石ユニットに関して、少なくとも一対の前記磁石ティースのそれぞれに、切欠きが設けられており、
前記複数の磁石ティースが円弧状に並んだ状態で、一対の前記切欠きに、固定ブロックが圧入されており、
前記固定ブロックが前記切欠きに挿入された状態で、前記固定ブロックが前記回転子本体に締結される、
回転電機。 - 前記複数の磁石ティースは、複数の橋絡部で連結されており、
一つの前記磁石ユニットを構成する前記複数の磁石ティースは、前記複数の橋絡部を折り曲げることで円弧状に並んでいる、
請求項1の回転電機。 - 前記磁石ティースは、鋼板を積層することで形成されており、
前記磁石ティースには、第1タイプの前記磁石ティースと、第2タイプの前記磁石ティースとが含まれており、
前記第1タイプの磁石ティースは、周方向の一側端面の突出部に、軸部を有し、
前記第2タイプの磁石ティースは、周方向の他側端面の突出部に軸部を有し、
前記磁石ユニットはそれぞれ、前記第1タイプの磁石ティースの前記軸部と、前記第2タイプの磁石ティースの前記軸部とが嵌め合わされて、構成される、
請求項1の回転電機。 - 前記磁石ティースは、鋼板を積層することで形成されており、
前記磁石ティースには、第3タイプの前記磁石ティースと、第4タイプの前記磁石ティースとが含まれており、
前記第3タイプの磁石ティースは、周方向の一側端面の突出部に、長穴を有し。
前記第4タイプの磁石ティースは、周方向の他側端面の突出部に軸部を有し、
前記磁石ユニットはそれぞれ、前記第3タイプの磁石ティースの前記長穴と、前記第4タイプの磁石ティースの前記軸部とが嵌め合わされて、構成される、
請求項1の回転電機。 - 前記磁石ユニットは、ブロック材を加工して形成されている、請求項1の回転電機。
- 前記磁石ティースはそれぞれ、一側端面に第1穴を有し、他側端面に第2穴を有し、
前記磁石ティースのそれぞれの前記第1穴と、隣接する前記磁石ティースの前記第2穴とにピンが圧入されている、
請求項5の回転電機。 - 前記第1穴または前記第2穴の一方のみが、長穴であり、他方は、円形穴である、
請求項6の回転電機。 - 前記長穴には、該長穴の領域が拡大位置と縮小位置とに区分けられる凸形状が設けられている、請求項4または7の回転電機。
- 前記回転子は、アキシャルギャップローター型回転電機の回転子であり、
前記磁石ユニットは、前記回転子の軸長方向に、前記回転子本体に接続されており、
前記磁石ユニットは、前記回転子の軸長方向に、前記固定子とギャップ距離を持って配置されている、
請求項1~8の何れか一項の回転電機。 - 前記磁石ユニットが前記回転子本体に対して軸径方向に複数に分割されている、
請求項9の回転電機。 - 軸径方向に並ぶ複数の前記磁石ユニットの円周方向位相が異なっている、
請求項10の回転電機。 - 前記回転子は、インナーローター型回転電機の回転子もしくはアウターローター型回転電機の回転子であり、
前記磁石ユニットは、前記回転子の径方向に、前記回転子本体に接続されており、
前記磁石ユニットは、前記回転子の径方向に、前記固定子とギャップ距離を持って配置されている、
請求項1~8の何れか一項の回転電機。 - 前記磁石ユニットが前記回転子本体に対して軸長方向に複数に分割されている、
請求項12の回転電機。 - 軸長方向に並ぶ複数の前記磁石ユニットの円周方向位相が異なっている、
請求項13の回転電機。
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