WO2017221496A1 - 永久磁石式回転電機の回転子および永久磁石式回転電機 - Google Patents
永久磁石式回転電機の回転子および永久磁石式回転電機 Download PDFInfo
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- WO2017221496A1 WO2017221496A1 PCT/JP2017/012308 JP2017012308W WO2017221496A1 WO 2017221496 A1 WO2017221496 A1 WO 2017221496A1 JP 2017012308 W JP2017012308 W JP 2017012308W WO 2017221496 A1 WO2017221496 A1 WO 2017221496A1
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- permanent magnet
- polygonal column
- rotor
- axial direction
- flat surface
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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
- H02K1/27—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
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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
- H02K1/27—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
- H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator
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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
- H02K1/27—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
- H02K1/27—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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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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
- H02K1/27—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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
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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
- H02K1/27—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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial 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
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to a rotor of a permanent magnet type rotating electrical machine including a permanent magnet and a permanent magnet type rotating electrical machine.
- the rotor in order to suppress torque pulsation called cogging torque generated by the interaction between the permanent magnet of the rotor and the stator core, the rotor is in a state where the permanent magnet of the rotor is inclined with respect to the axial direction.
- the rotor of the permanent magnet type rotating electrical machine is attached to the iron core to have a skew structure, but the holding portion provided at the axial end of the rotor iron core is a protrusion extending in the axial direction.
- the permanent magnet cannot be attached to the rotor core while being inclined with respect to the axial direction.
- the present invention has been made to solve the above-described problems.
- the permanent magnet can be positioned with high accuracy and attached to the rotor core, and the permanent magnet is inclined with respect to the axial direction.
- a rotor of a permanent magnet type rotary electric machine and a permanent magnet type rotary electric machine that can be attached to a rotor core in a state are provided.
- a rotor of a permanent magnet type rotating electrical machine includes a rotor core having a cylindrical portion and a pair of polygonal column portions provided at both axial end portions of the cylindrical portion, and a pasting surface to be pasted to the rotor core.
- a rotor core having a cylindrical portion and a pair of polygonal column portions provided at both axial end portions of the cylindrical portion, and a pasting surface to be pasted to the rotor core.
- Each of the first polygonal column part which is one of the pair of polygonal column parts and the second polygonal column part which is the other polygonal column part.
- a circumferential centroid about the cylindrical portion of the flat surface of the first polygonal column portion is disposed in a circumferential direction shifted from a centroid of the circumferential direction of the flat surface of the second polygonal column portion,
- the permanent magnet is attached to the flat surface of the first polygonal column and the flat surface of the second polygonal column in a state where the permanent magnet is inclined with respect to the axial direction.
- the rotor core having a cylindrical portion and a pair of polygonal column portions provided at both axial end portions of the cylindrical portion, and affixed to the rotor core.
- Each of the first polygonal column part which is one polygonal column part and the second polygonal column part which is the other polygonal column part. Has a flat surface, and the circumferential centroid of the cylindrical portion of the flat surface of the first polygonal column portion is shifted in the circumferential direction with respect to the circumferential centroid of the flat surface of the second polygonal column portion.
- the permanent magnet is attached to the flat surface of the first polygonal column and the flat surface of the second polygonal column with the permanent magnet inclined with respect to the axial direction, the permanent magnet Can be positioned with high precision and attached to the rotor core Can be attached to the rotor core by the permanent magnet is inclined relative to the axial direction.
- FIG. 1 It is a perspective view which shows the rotor of the permanent magnet type rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the permanent magnet and 1st polygonal column part of FIG. It is a top view which shows the permanent magnet and 2nd polygonal column part of FIG. It is a top view which shows the permanent magnet and cylindrical part of FIG. It is sectional drawing which shows the modification of the permanent magnet of FIG. It is sectional drawing which shows the modification of the permanent magnet of FIG. It is a perspective view which shows the rotor of the permanent magnet type rotary electric machine which concerns on Embodiment 2 of this invention.
- FIG. 1 is a perspective view showing a rotor of a permanent magnet type rotating electrical machine according to Embodiment 1 of the present invention.
- the rotor of the permanent magnet type rotating electrical machine according to the first embodiment of the present invention includes a rotor core 1 and a plurality of permanent magnets 2 provided on the outer periphery of the rotor core 1.
- the permanent magnet 2 has a plate shape with a flat attachment surface. Therefore, the permanent magnet 2 can be manufactured at low cost.
- the permanent magnet 2 forms a magnetic pole of the rotor.
- one permanent magnet 2 is provided for one magnetic pole of the rotor.
- the plurality of permanent magnets 2 are arranged so that the polarities are alternately different in the circumferential direction of the rotor.
- Each permanent magnet 2 is magnetized so that the magnetic path is oriented in the radial direction of the rotor.
- the plurality of permanent magnets 2 are arranged at intervals in the circumferential direction of the rotor.
- the plurality of permanent magnets 2 are arranged at equal intervals in the circumferential direction of the rotor.
- the total number of permanent magnets 2 is six. Therefore, the number of poles of the rotor is six.
- the rotor core 1 includes a cylindrical cylindrical portion 11 and a pair of polygonal column portions 12 provided at both axial ends of the cylindrical portion 11.
- the polygonal column portion 12 provided at one axial end portion of the cylindrical portion 11 is defined as a first polygonal column portion 12 ⁇ / b> A, and provided at the other axial end portion of the cylindrical portion 11.
- the obtained polygonal column portion 12 is defined as a second polygonal column portion 12B.
- the axial direction is the axial direction of the rotor and is the direction of the arrow RA in FIG.
- FIG. 2 is a plan view showing the permanent magnet 2 and the first polygonal column portion 12A of FIG. A plurality of corner portions 12C are formed on the outer peripheral portion of the first polygonal column portion 12A. The attachment surface of the permanent magnet 2 is attached to one surface of the pair of surfaces constituting the corner portion 12C of the first polygonal column portion 12A.
- FIG. 3 is a plan view showing the permanent magnet 2 and the second polygonal column 12B of FIG.
- a plurality of corner portions 12D are formed on the outer peripheral portion of the second polygonal column portion 12B.
- the attachment surface of the permanent magnet 2 is attached to one surface of the pair of surfaces constituting the corner portion 12D of the second polygonal column portion 12B.
- FIG. 4 is a plan view at the axial center position showing the permanent magnet 2 and the cylindrical portion 11 of FIG. Each permanent magnet 2 is in contact with the cylindrical portion 11 at one point.
- the permanent magnet 2 is affixed to the rotor core 1 in an inclined state with respect to the axial direction.
- the rotor has a skew structure.
- the flat surface of the permanent magnet 2 is in contact with the flat surface 12AS of the first polygonal column portion 12A and the flat surface 12AS of the second polygonal column portion 12B.
- positioning is performed in the circumferential direction of the permanent magnet using a pair of polygonal columns disposed at both axial ends of the cylindrical portion of the rotor core, and the circumferential direction of the permanent magnet is determined.
- these polygonal column bodies are configured such that the positions of the respective flat surfaces in contact with the permanent magnets coincide with each other in the circumferential direction when viewed from the axial direction. . Therefore, it is difficult to attach a permanent magnet having a flat attachment surface to the outer peripheral surface of the rotor core in a state where the permanent magnet is inclined with respect to the axial direction.
- the center 12AC of the flat surface 12AS of the first polygonal column 12A and the center 12BC of the second polygonal column 12B do not match when viewed from the axial direction.
- the center 12AC of the flat surface 12AS of the first polygonal column 12A and the center 12BC of the second polygonal column 12B have a positional relationship that does not match in the circumferential direction.
- the centroid in the circumferential direction on the flat surface 12AS of the first polygonal column 12A is shifted in the circumferential direction with respect to the centroid in the circumferential direction of the cylindrical portion 11 on the flat surface 12BS of the second polygonal column 12B.
- the circumferential direction is the circumferential direction of the cylindrical portion 11. Therefore, the permanent magnet 2 having a flat attachment surface can be attached to the rotor core while being inclined with respect to the axial direction.
- the flat surface 12AS and the flat surface 12BS to which the adjacent permanent magnets 2 in the first polygonal column portion 12A and the second polygonal column portion 12B are attached can be easily formed without interfering with each other.
- the permanent magnet 2 When the permanent magnet 2 is attached to the cylindrical portion 11 of the rotor core 1 in a state inclined with respect to the axial direction, in other words, when the permanent magnet 2 is skew attached to the cylindrical portion 11 of the rotor core 1, the permanent magnet 2 has only one point of contact with the cylindrical portion 11, so it is difficult to fix the permanent magnet 2 at a specific circumferential position with a specific inclination angle with respect to the cylindrical portion 11. Furthermore, since the distance between the permanent magnet 2 and the cylindrical portion 11 increases toward the outside in the axial direction, the area that can be fixed using an adhesive or the like decreases, and the adhesive strength decreases.
- the retention surface of the permanent magnet with respect to the rotor core is improved by making the surface of the permanent magnet attached to the rotor core a curved surface along the rotor core.
- the manufacturing cost of the permanent magnet increases, and the rotor becomes expensive.
- the positioning accuracy can be improved. Further, even when the inexpensive permanent magnet 2 having a flat pasting surface is disposed to be inclined with respect to the axial direction, the positioning accuracy of the permanent magnet 2 can be increased. Moreover, the variation in the position of the permanent magnet at the time of manufacture can be reduced. In addition, the cogging torque can be effectively reduced by adopting the rotor skew structure.
- the permanent magnet 2 is formed of the flat surface 12AS or the cylindrical portion of the flat surface 12BS and the rotor core 1. 11, the positioning accuracy of the permanent magnet 2 is higher when the permanent magnet 2 is arranged to be inclined with respect to the axial direction than when the cylindrical portion 11 has only one contact portion. improves.
- the rotor core 1 is manufactured by manufacturing the cylindrical portion 11, the first polygonal column portion 12A, and the second polygonal column portion 12B as a single body by cutting from one steel material. And position variations, such as the coaxiality of the 2nd polygonal column part 12B, can be made small. Thereby, the permanent magnet 2 can be positioned with high accuracy. Further, the cogging torque can be effectively reduced.
- the cylindrical portion 11 is manufactured by cutting a round bar, and the first polygonal column portion 12A and the second polygonal column portion 12B are manufactured by laminating press-punched thin plates or
- the rotor core 1 may be configured by cutting a metal lump or using a dust core and combining them.
- the processing of the first polygonal column portion 12A and the second polygonal column portion 12B becomes expensive. In this way, when the cylindrical portion 11 and the first polygonal column portion 12A and the second polygonal column portion 12B are separate parts, the cylindrical portion 11 is connected to the first polygonal column portion 12A and the second polygonal column portion 12B. In order to make positioning highly accurate, positioning protrusions may be provided on the joint surfaces. Further, if the polygonal column 12 is a magnetic body, the flat portion of the polygonal column 12 is in close contact with the permanent magnet 2, thereby increasing the permeance of the magnetic path of the magnetic flux generated from the permanent magnet 2, thereby increasing the amount of magnetic flux. This increases the torque of the rotating electrical machine.
- the cylindrical portion 11 and the pair of polygonal column portions 12 provided at both axial ends of the cylindrical portion 11 are provided.
- Each of the pair of polygonal column portions 12 has a center when viewed in the axial direction.
- a flat surface 12AS and a flat surface 12BS are formed so as to be displaced from each other, and the permanent magnet 2 is a flat surface of each of the pair of polygonal column portions 12 with the permanent magnet 2 inclined with respect to the axial direction.
- the permanent magnet 2 Since it is affixed to the surface 12AS and the flat surface 12BS, the permanent magnet 2 can be positioned with high precision and affixed to the rotor core 1, and the permanent magnet 2 can be inclined with respect to the axial direction. Affixed to iron core 1 It can be attached. Since the attachment surface formed on the permanent magnet 2 is flat, the permanent magnet 2 can be manufactured at low cost. Furthermore, if the polygonal column portion 12 is a magnetic body, the permanent magnet 2 and the polygonal column portion 12 are brought into close contact with each other, whereby the amount of magnetic flux can be improved and the torque of the rotating electrical machine can be improved.
- the shaft for supporting the rotor is omitted.
- the cylindrical portion 11, the first polygonal column portion 12 ⁇ / b> A, and the second polygonal column portion 12 ⁇ / b> B are configured to be uniformly filled up to the central axis, but the cylindrical portion 11, the first polygonal column portion 12 ⁇ / b> A, and the second polygonal column are included.
- the part 12B may be hollow. In these hollow portions, a solid or hollow cylindrical body extending in the axial direction may exist as a shaft, or the first polygonal column portion 12 ⁇ / b> A and the second polygonal column that are integrated with the cylindrical portion 11 and are hollow.
- An extending portion of the cylindrical portion 11 that penetrates the portion 12B, extends outward in the axial direction from the first polygonal column portion 12A and the second polygonal column portion 12B, and is processed to have an arbitrary outer diameter may exist as a shaft.
- the surface of the permanent magnet 2 attached to the rotor core 1 is flat, but the surface opposite to the flat surface is not limited to flat.
- the shape of the permanent magnet 2 may be, for example, a circular shape on one side as shown in FIG. 5 and a flat shape on the opposite side, or a trapezoidal shape as shown in FIG. .
- the torque is improved as the magnetic flux increases to the stator facing the rotor.
- the magnetomotive force distribution by the permanent magnet 2 changes smoothly in the circumferential direction as compared with the case where the permanent magnet 2 is a flat surface, so that the cogging torque can be further reduced.
- FIG. 7 is a perspective view showing a rotor of a permanent magnet type rotating electrical machine according to Embodiment 2 of the present invention.
- the number of poles is larger than that in the first embodiment, and the number of poles is 22, that is, the number of permanent magnets 2 is 22.
- Other configurations are the same as those in the first embodiment.
- the torque of the rotating electrical machine increases as the number of magnetic poles increases.
- the number of permanent magnets 2 increases, there is a higher possibility that manufacturing variations in the respective attachment positions of the permanent magnets 2 will increase. Therefore, highly accurate positioning using the polygonal column portion 12 and the polygonal column portion 12 of the present invention is effective.
- the torque of the rotating electric machine is improved as compared with the first embodiment, and each of the permanent magnets 2 is provided. It is possible to suppress an increase in manufacturing variation in the mounting position.
- FIG. FIG. 8 is a plan view showing a pair of polygonal column portions in a rotor of a permanent magnet type rotating electric machine according to Embodiment 3 of the present invention.
- the flat surface 12AS of the first polygonal column portion 12A and the flat surface 12BS of the second polygonal column portion 12B are arranged on the same plane.
- the flat surface 12AS of the first polygonal column part 12A and the flat surface 12BS of the second polygonal column part 12B to which the application surface of the same permanent magnet 2 is attached are the same. It is arranged on a plane.
- Other configurations are the same as those in the first embodiment.
- the material of the polygonal column portion 12 is desirably an electromagnetic steel plate material having a high magnetic permeability.
- the same permanent magnet 2 attachment surface is attached in the pair of polygonal column portions 12. Since the flat surface 12AS and the flat surface 12BS are arranged on the same plane, the adhesion between the first polygonal column portion 12A and the second polygonal column portion 12B and the permanent magnet 2 can be improved. Thereby, the retainability of the permanent magnet 2 by the first polygonal column portion 12A and the second polygonal column portion 12B can be improved.
- FIG. 9 is a plan view showing a polygonal column portion in a rotor of a permanent magnet type rotating electric machine according to Embodiment 4 of the present invention.
- a plane perpendicular to the axial direction of the polygonal column portion 12 is asymmetric with respect to an arbitrary center line 12CA that is a plane perpendicular to the axial direction and passes through the center of the polygonal column portion 12. .
- the shape of the polygonal column 12 when viewed in the axial direction is asymmetric with respect to the center line 12CA.
- a broken line 12R in FIG. 9 indicates a shape in which a plane perpendicular to the axial direction of the polygonal column portion 12 is reversed around the center line 12CA.
- the broken line 12R matches the shape of a plane perpendicular to the axial direction of the other polygonal column portion 12.
- the shape of one polygonal column portion 12 when viewed in the axial direction matches the shape of the other polygonal column portion 12 when viewed in the axial direction when the front and back are reversed about the center line 12CA.
- Other configurations are the same as those in the first embodiment.
- the flat surface 12AS and the flat surface 12BS corresponding to the permanent magnet 2 are formed.
- the permanent magnet 2 can be skew-attached without being obstructed by a portion other than the flat surface 12AS and the flat surface 12BS.
- the first polygonal column portion 12A and the second polygonal column portion 12B can be formed of the same component, for example, if the thin plate is press-molded, the first polygonal column portion 12A and the second polygonal plate can be formed by one type of mold.
- the polygonal column 12B can be manufactured, and if it is a processed product such as a wire cut, after cutting a polygonal column that is long in the axial direction in a single process, a plurality of pieces in a direction perpendicular to the axial direction By dividing, the first polygonal column portion 12A and the second polygonal column portion 12B can be manufactured at a time, and therefore can be manufactured at low cost.
- the shape of the polygonal column portion 12 when viewed in the axial direction is asymmetric with respect to the center line 12CA.
- the front and back are reversed with the center line 12CA as the center, it matches the shape of the other polygonal column 12 when viewed in the axial direction, so that it is not obstructed by parts other than the flat surface 12AS and the flat surface 12BS.
- the permanent magnet 2 can be skewed and the pair of polygonal column portions 12 can be manufactured at low cost.
- FIG. FIG. 10 is a plan view showing permanent magnets and polygonal column portions in a rotor of a permanent magnet type rotating electric machine according to Embodiment 5 of the present invention.
- vertices 12V that are twice the number of permanent magnets 2, that is, twice the number of poles, are formed.
- the outer shape of the polygonal column portion 12 when viewed in the axial direction is a polygonal shape having vertices twice the number of poles.
- the vertex 12 ⁇ / b> V is desirably arranged so that one side of the polygonal column portion 12 is parallel to the flat attachment surface of the permanent magnet 2. Further, the vertex 12V is arranged so that one side in the outer diameter shape of the plane perpendicular to the axial direction of the polygonal column 12 is longer than the long side of the cross section perpendicular to the axial direction of the permanent magnet 2. Is desirable. Other configurations are the same as those in the first embodiment.
- the number of vertices 12V that is twice the number of poles is formed on the outer diameter side contour line of the plane perpendicular to the axial direction in the polygonal column portion 12.
- a corresponding pair of flat surfaces is formed on the outer diameter side contour line of the plane perpendicular to the axial direction in the polygonal column portion 12.
- the polygonal column part 12 becomes a simple planar shape. Therefore, the punching process can be suppressed to the minimum number of times when pressing a thin plate, and the processing process can be suppressed to the minimum number of processes when cutting, so the processing cost for forming the polygonal column portion 12 is low. Can be suppressed. Further, since the thickest polygonal column 12 can be obtained while having a flat surface for holding the permanent magnet 2, it is possible to obtain the rotor core 1 having high rigidity.
- the outer shape of the polygonal column 12 when viewed in the axial direction is twice the number of poles. Therefore, the polygonal column portion 12 is formed with a pair of flat surfaces corresponding to the permanent magnet 2 so that the permanent magnet 2 can be skewed. Moreover, since the polygonal column part 12 becomes a simple planar shape, the processing cost concerning shaping
- FIG. 11 is a perspective view showing a rotor of a permanent magnet type rotating electric machine according to Embodiment 6 of the present invention.
- the rotor of the permanent magnet type rotating electrical machine includes a rotor core 1 and a plurality of permanent magnets 2 provided on the outer periphery of the rotor core 1.
- the rotor core 1 has a cylindrical portion 11 and a pair of polygonal column portions 12 provided at both axial ends of the cylindrical portion 11.
- the polygonal column portion 12 provided at one axial end portion of the cylindrical portion 11 is defined as a first polygonal column portion 12 ⁇ / b> A, and provided at the other axial end portion of the cylindrical portion 11.
- the obtained polygonal column portion 12 is defined as a second polygonal column portion 12B.
- FIG. 12 is a plan view showing the rotor of the permanent magnet type rotating electric machine of FIG.
- the rotor core 1 further includes a plurality of protrusions 13 provided on the outer peripheral portion of the polygonal column portion 12.
- the plurality of protrusions 13 are provided only on one side in the circumferential direction with respect to the permanent magnet 2.
- the rotor core 1 further has a protrusion 13 provided on one side in the circumferential direction from the permanent magnet 2.
- the protrusion 13 is a circumferential positioning portion that positions the permanent magnet 2 in the circumferential direction with respect to the polygonal column portion 12.
- the protrusions 13 are arranged at equal intervals in the circumferential direction, like the permanent magnet 2. As shown in FIG. 11, the protrusion 13 has a rectangular parallelepiped shape having the same axial length as that of the polygonal column portion 12 that extends uniformly in the axial direction. Further, the protrusion 13 is formed integrally with the polygonal column portion 12. Further, the protrusion 13 is disposed on the flat surface 12AS of the first polygonal column portion 12A and the flat surface 12BS of the second polygonal column portion 12B of the rotor core 1. The permanent magnet 2 affixed to the same flat surface 12AS and flat surface 12BS is in contact with one side of the rectangular parallelepiped shape of the protrusion 13. Other configurations are the same as those in the first embodiment.
- the contact portion between the projection 13 and the permanent magnet 2 may be provided with a chamfer or a fillet.
- the protrusion 13 is not limited to a shape that is uniform in the axial direction, and is formed, for example, in a shape that is inclined at the same angle as the long side of the permanent magnet 2 and that is in surface contact with the permanent magnet 2 or is stepped in the axial direction. A plurality of contact portions that contact the permanent magnet 2 may be provided.
- a jig for circumferential positioning of the permanent magnet 2 attached to the rotor core 1 is required at the time of manufacturing the rotor. Further, since a jig for positioning in the circumferential direction is not necessary, the manufacturing cost can be further reduced. Further, since the protrusion 13 is fixed so that the permanent magnet 2 does not move in the circumferential direction, the shear stress related to the bonded portion when the permanent magnet 2 and the rotor core 1 are bonded and fixed can be reduced. The risk of peeling from the rotor core 1 of 2 can be reduced.
- the protrusion 13 is provided on each of the first polygonal column part 12A and the second polygonal column part 12B, and is provided on the protrusion 13 and the second polygonal column part 12B provided on the first polygonal column part 12A. Since each of the protrusions 13 is arranged on the opposite side in the circumferential direction with the permanent magnet 2 as the center, it is possible to reduce the risk of detachment of the permanent magnet 2 regardless of the rotation direction.
- the protrusions provided on the polygonal column portions present at both axial ends of the rotor core extend in the axial direction as in the sixth embodiment to support the permanent magnet in the circumferential direction, although it is configured to be positioned, since there are protrusions on both sides of the permanent magnet in the circumferential direction, it is impossible to hold the permanent magnet arranged in a skewed manner.
- the protrusion 13 is present only on one side in the circumferential direction, the skewed permanent magnet 2 can be held in the circumferential direction.
- the rotor core 1 further has the protrusion 13 provided on one side in the circumferential direction from the permanent magnet 2. Therefore, the circumferential position of the permanent magnet 2 can be easily determined.
- FIG. 13 is a perspective view showing a rotor of a permanent magnet type rotating electrical machine according to Embodiment 7 of the present invention
- FIG. 14 is a plan view showing the rotor of the permanent magnet type rotating electrical machine of FIG.
- the rotor of the permanent magnet type rotating electrical machine includes a rotor core 1 and a plurality of permanent magnets 2 provided on the outer periphery of the rotor core 1.
- the rotor core 1 has a cylindrical portion 11 and a pair of polygonal column portions 12 provided at both axial ends of the cylindrical portion 11.
- the polygonal column portion 12 provided at one axial end portion of the cylindrical portion 11 is defined as a first polygonal column portion 12 ⁇ / b> A, and provided at the other axial end portion of the cylindrical portion 11.
- the obtained polygonal column portion 12 is defined as a second polygonal column portion 12B.
- the rotor core 1 further has a plurality of protrusions 14 provided on the outer peripheral portion of the polygonal column portion 12.
- the plurality of protrusions 14 are provided only on one side in the circumferential direction with respect to the permanent magnet 2.
- the rotor core 1 includes a protrusion 14 provided on one side in the circumferential direction from the permanent magnet 2.
- the protrusion 14 includes a circumferential positioning portion 14A that positions the permanent magnet 2 in the circumferential direction with respect to the polygonal column portion 12, and a separation preventing portion 14B that regulates movement of the permanent magnet 2 to the radially outer side with respect to the polygonal column portion 12. It has become.
- the shape of the plane perpendicular to the axial direction of the protrusion 13 is a square shape
- the shape of the plane perpendicular to the axial direction of the protrusion 14 is It is L-shaped.
- the plurality of protrusions 13 are arranged at equal intervals in the circumferential direction.
- the protrusion 14 is a polygonal column that extends in the axial direction similarly to the polygonal column 12 that extends uniformly in the axial direction.
- the protrusions 14 are provided on the flat surface 12AS of the first polygonal column portion 12A and the flat surface 12BS of the second polygonal column portion 12B.
- the permanent magnet 2 affixed to the same flat surfaces 12AS and 12BS comes into contact with one side of the protrusion 14. Therefore, as in the sixth embodiment, it is possible to obtain the effects of increasing the accuracy of circumferential positioning of the permanent magnet 2 and reducing the risk of peeling. Furthermore, since the protrusion 14 has a portion that covers the outer diameter of the permanent magnet 2, even if the permanent magnet 2 is peeled off from the rotor core 1, the permanent magnet 2 does not move outward in the radial direction. It is possible to prevent danger such as collision of the permanent magnet 2 with the stator or the like.
- Y-shaped projections for preventing permanent magnet detachment are provided at both axial ends of the rotor.
- the Y-shaped protrusions hold the permanent magnets from both sides in the circumferential direction, and the Y-shaped protrusions that hold the same permanent magnet have the same position in the axial direction. It is difficult to hold the magnet.
- the seventh embodiment when the permanent magnet 2 is skewed because the L-shaped protrusion 14 is disposed only on one side in the circumferential direction of the permanent magnet 2 and the protrusion 14 holds the permanent magnet 2. Even so, the permanent magnet 2 can be easily held.
- the L-shaped protrusion 14 is disposed on the inner side of the circle 2C formed by the point located on the outermost diameter of the permanent magnet 2.
- the permanent magnet 2 is disposed at the outermost diameter of the rotor, and a large amount of magnetic flux flows to the stator when configuring the rotating electrical machine, so that the torque can be increased.
- the magnetic flux of the permanent magnet 2 leaks to the protrusion 14. Therefore, the circumferential width 14 ⁇ / b> W of the protrusion 14 and the thickness 14 ⁇ / b> T that is the radial width of the outer diameter portion of the protrusion 14 are as small as possible. Is desirable. Other configurations are the same as those in the first embodiment.
- the rotor core 1 is circumferentially one side of the permanent magnet 2 and radially outward of the permanent magnet 2.
- the projection 14 is further provided with an effect of improving the circumferential positioning of the permanent magnet 2 and reducing the risk of peeling. Further, the permanent magnet 2 is peeled from the rotor core 1. Even in this case, the permanent magnet 2 can be prevented from detaching radially outward.
- FIG. 15 is a side view showing a rotor of a permanent magnet type rotating electric machine according to Embodiment 8 of the present invention.
- the planar shape of the permanent magnet 2 viewed from the outside in the radial direction is a rectangular shape.
- the permanent magnet 2 has a configuration in which a cross-sectional shape perpendicular to the longitudinal direction is extended so as to be uniform over the longitudinal direction. In other words, the permanent magnet 2 is formed in a rectangular parallelepiped shape.
- the planar shape of the permanent magnet viewed from the outside in the radial direction is a rhombus.
- Such a shape requires a permanent magnet to be processed after molding, which increases the manufacturing cost.
- the permanent magnet 2 can be easily molded and can be manufactured at low cost.
- the planar shape of a permanent magnet is a rhombus as described in Patent Document 2 since both ends in the axial direction of the permanent magnet are large, the leakage magnetic flux to the stator core increases, and the amount of magnetic flux increases in the axial direction. There is a concern that the cogging torque increases due to unbalance.
- the planar shape is a rectangular shape, a leakage magnetic flux is hardly generated, and the cogging torque can be reduced.
- Other configurations are the same as those in the first embodiment.
- the permanent magnet 2 is formed in a rectangular parallelepiped shape, and can be manufactured at a low cost. Cogging torque can be reduced.
- the configuration in which the shape of the permanent magnet 2 is a rectangular parallelepiped shape has been described.
- the vertical cross-sectional shape may be a bowl shape or a trapezoidal shape. With these shapes, the torque can be improved and the cogging torque can be reduced as in the first embodiment.
- FIG. 16 is a perspective view showing a rotor of a permanent magnet type rotating electrical machine according to Embodiment 9 of the present invention
- FIG. 17 is a side view showing one axial end portion of the rotor of the permanent magnet type rotating electrical machine of FIG.
- the rotor core 1 further has a protrusion 15 provided on the outer side in the axial direction than the permanent magnet 2. Since the permanent magnet 2 has a rectangular parallelepiped shape inclined with respect to the axial direction, at least two of the four vertices constituting the side shape of the permanent magnet 2 are viewed from the side, and the polygonal column portion 12 of the rotor core 1.
- a gap 16 is formed between the permanent magnet 2 and the axial end surface of the rotor core 1.
- the protrusion 15 is disposed in the gap 16.
- a gap portion 16 is also formed on the flat surface 12BS, and the protrusion 15 is disposed in the gap portion 16.
- the protrusion 15 is an axial positioning portion provided on the outer side in the longitudinal direction from the permanent magnet 2.
- Other configurations are the same as those in the eighth embodiment.
- the permanent magnet 2 Since the permanent magnet 2 is positioned with high accuracy in the axial direction by the protrusions 15, manufacturing variations are reduced. Further, since the permanent magnet 2 is positioned with high accuracy in the axial direction, the effect of reducing the cogging torque due to skew is effectively exhibited.
- the protrusion 15 is composed of a thin plate in which the first polygonal column portion 12A and the second polygonal column portion 12B are stacked, and several sheets at both axial end portions are thin plates on which the protrusion is formed, and other than that, the protrusion is formed.
- a structure that is manufactured so as to be formed of a thin plate that is not formed is inexpensive and suitable.
- the rotor core 1 further has the protrusion 15 provided on the outer side in the longitudinal direction from the permanent magnet 2. Therefore, the permanent magnet 2 can be positioned with high accuracy in the axial direction.
- FIG. FIG. 18 is a perspective view showing a permanent magnet type rotating electric machine according to Embodiment 10 of the present invention.
- a rotor of a permanent magnet type rotating electrical machine according to Embodiment 10 of the present invention includes a plurality of rotor cores 1 that are provided continuously in the axial direction, and a plurality of rotor cores 1 that are provided on the outer periphery of each rotor core 1.
- a permanent magnet 2 is provided.
- the rotor of the permanent magnet type rotating electrical machine includes a pair of rotor cores 1. The pair of rotor cores 1 are stacked in the axial direction.
- one of the pair of rotor cores 1 stacked in the axial direction is a first rotor core 1A and the other is a second rotor core 1B.
- the plurality of permanent magnets 2 provided on the outer peripheral portion of the first rotor core 1A is referred to as a first permanent magnet 2A
- the plurality of permanent magnets 2 provided on the outer peripheral portion of the second rotor core 1B is referred to as a second permanent magnet 2B.
- the first rotor core 1A and the second rotor core 1B are coupled so as to have a symmetrical shape with respect to a plane perpendicular to the axial direction at the end portions in contact with each other in the axial direction.
- the polygonal column portion 12 on the second rotor core 1B side in the first rotor core 1A is viewed from the axial direction with the polygonal column portion 12 on the first rotor core 1A side in the second rotor core 1B. It is arranged so that it may overlap.
- the polygonal column part 12 on the opposite side to the 2nd rotor core 1B in the 1st rotor core 1A is the polygonal column part 12 on the opposite side to the 1st rotor core 1A in the 2nd rotor core 1B, They are arranged so as to overlap when viewed from the axial direction.
- the first permanent magnet 2A and the second permanent magnet 2B adjacent in the axial direction are arranged so as to be V-shaped when viewed from the radial direction.
- the first permanent magnet 2A and the second permanent magnet 2B adjacent in the axial direction are surfaces in which the first rotor core 1A and the second rotor core 1B are in contact with each other in the axial direction and are perpendicular to the axial direction. Centering on the surface, they are arranged so as to be symmetrical to each other.
- a stator core 3 is disposed around the first rotor core 1A, the first permanent magnet 2A, the second rotor core 1B, and the second permanent magnet 2B.
- the stator core 3 is formed in a uniform shape in the axial direction.
- the first rotor core 1 ⁇ / b> A, the first permanent magnet 2 ⁇ / b> A, the second rotor core 1 ⁇ / b> B, and the second permanent magnet 2 ⁇ / b> B are disposed to face the stator core 3 in the radial direction with a gap therebetween.
- the stator includes an annular core back 31 and a stator core 3 having a plurality of teeth 32 protruding radially inward from the core back 31, and a plurality of unillustrated fixings wound around and mounted on the plurality of teeth 32. And a child winding.
- the stator core 3 is made of a magnetic material.
- a current is supplied to the stator winding from an inverter (not shown). When a current is supplied to the stator winding, a magnetic flux is generated in the gap through the teeth.
- Other configurations are the same as those in the first embodiment.
- the stator may be combined with the rotors of the first to ninth embodiments.
- the axial electromagnetic force generated between the first permanent magnet 2A and the stator core 3 and the first 2 Since the axial electromagnetic force generated between the permanent magnet 2B and the stator core 3 cancels each other, in addition to the effect of reducing cogging torque due to skew, vibration and noise due to the axial electromagnetic force are also reduced. be able to.
- Rotor core 1A 1st rotor core, 1B 2nd rotor core, 2 permanent magnet, 2A 1st permanent magnet, 2B 2nd permanent magnet, 3 stator core, 11 cylindrical part, 12 polygonal column part, 12A First polygonal column part, 12B, second polygonal column part, 12C, 12D corner part, 13 protrusions, 14 protrusions, 15 protrusions, 16 gaps, 31 core back, 32 teeth.
Abstract
Description
図1はこの発明の実施の形態1に係る永久磁石式回転電機の回転子を示す斜視図である。この発明の実施の形態1に係る永久磁石式回転電機の回転子は、回転子鉄心1と、回転子鉄心1の外周部に設けられた複数の永久磁石2とを備えている。
実施の形態1では、極数が6極の回転子について説明したが、極数は何極であってもよい。図7はこの発明の実施の形態2に係る永久磁石式回転電機の回転子を示す斜視図である。実施の形態2では、実施の形態1よりも極数が多くなっており、極数は22極、つまり、永久磁石2の数が22個である。その他の構成は、実施の形態1と同様である。
図8はこの発明の実施の形態3に係る永久磁石式回転電機の回転子における一対の多角柱部を示す平面図である。第1多角柱部12Aの平坦面12ASおよび第2多角柱部12Bの平坦面12BSは、同一平面上に配置されている。言い換えれば、一対の多角柱部12の中で、同一の永久磁石2の貼り付け面が貼り付けられる第1多角柱部12Aの平坦面12ASおよび第2多角柱部12Bの平坦面12BSは、同一平面上に配置されている。その他の構成は、実施の形態1と同様である。
図9はこの発明の実施の形態4に係る永久磁石式回転電機の回転子における多角柱部を示す平面図である。軸方向に対して垂直な平面であって多角柱部12の中心を通る任意の中心線12CAに対して、多角柱部12の軸方向に対して垂直な平面は、非対称な形状となっている。言い換えれば、軸方向に視た場合の多角柱部12の形状は、中心線12CAに対して非対称となっている。
図10はこの発明の実施の形態5に係る永久磁石式回転電機の回転子における永久磁石および多角柱部を示す平面図である。多角柱部12における軸方向に対して垂直な平面の外径側輪郭線には、永久磁石2の数の2倍、すなわち極数の2倍の数の頂点12Vが形成されている。言い換えれば、軸方向に視た場合の多角柱部12の外側形状は、極数の2倍の数の頂点を有する多角形状となっている。
図11はこの発明の実施の形態6に係る永久磁石式回転電機の回転子を示す斜視図である。永久磁石式回転電機の回転子は、回転子鉄心1と、回転子鉄心1の外周部に設けられた複数の永久磁石2とを備えている。回転子鉄心1は、円筒部11と、円筒部11の軸方向両端部に設けられた一対の多角柱部12とを有している。この例では、一対の多角柱部12の中で、円筒部11の軸方向一端部に設けられた多角柱部12を第1多角柱部12Aとし、円筒部11の軸方向他端部に設けられた多角柱部12を第2多角柱部12Bとする。
図13はこの発明の実施の形態7に係る永久磁石式回転電機の回転子を示す斜視図、図14は図13の永久磁石式回転電機の回転子を示す平面図である。永久磁石式回転電機の回転子は、回転子鉄心1と、回転子鉄心1の外周部に設けられた複数の永久磁石2とを備えている。回転子鉄心1は、円筒部11と、円筒部11の軸方向両端部に設けられた一対の多角柱部12とを有している。この例では、一対の多角柱部12の中で、円筒部11の軸方向一端部に設けられた多角柱部12を第1多角柱部12Aとし、円筒部11の軸方向他端部に設けられた多角柱部12を第2多角柱部12Bとする。
図15はこの発明の実施の形態8に係る永久磁石式回転電機の回転子を示す側面図である。永久磁石2の径方向外側から視た平面形状は長方形形状である。また、永久磁石2は、長手方向に垂直な断面形状が、長手方向に渡って一様となるように延伸した構成となっている。言い換えれば、永久磁石2は、直方体形状に形成されている。
図16はこの発明の実施の形態9に係る永久磁石式回転電機の回転子を示す斜視図、図17は図16の永久磁石式回転電機の回転子における軸方向一端部を示す側面図である。回転子鉄心1は、永久磁石2よりも軸方向外側に設けられた突起15をさらに有している。永久磁石2は、軸方向に対して傾斜した直方体形状であるため、永久磁石2の側面形状を構成する4つの頂点のうちの少なくとも2点が側面から視て回転子鉄心1の多角柱部12と同じ面内にある場合、回転子鉄心1の永久磁石2を保持する平坦面12ASには、永久磁石2と回転子鉄心1の軸方向端面との間に隙間部16が形成されている。突起15は隙間部16に配置されている。なお、図示していないが、平坦面12BSについても、隙間部16が形成されており、この隙間部16に突起15が配置されている。突起15は、永久磁石2よりも長手方向外側に設けられた軸方向位置決め部となっている。その他の構成は、実施の形態8と同様である。
図18はこの発明の実施の形態10に係る永久磁石式回転電機を示す斜視図である。図18では、回転子の構造を示すために、固定子鉄心3は一部のみを示している。この発明の実施の形態10に係る永久磁石式回転電機の回転子は、軸方向に連なって設けられた複数の回転子鉄心1と、それぞれの回転子鉄心1の外周部に設けられた複数の永久磁石2とを備えている。この例では、永久磁石式回転電機の回転子は、一対の回転子鉄心1を備えている。一対の回転子鉄心1は、互いに軸方向に重ねられている。
Claims (10)
- 円筒部および前記円筒部の軸方向両端部に設けられた一対の多角柱部を有する回転子鉄心と、
前記回転子鉄心に貼り付けられる貼り付け面が平坦に形成された永久磁石と
を備え、
一対の前記多角柱部の中の一方の前記多角柱部である第1多角柱部および他方の前記多角柱部である第2多角柱部のそれぞれには平坦面が形成され、
前記第1多角柱部の前記平坦面における前記円筒部についての周方向の図心は、前記第2多角柱部の前記平坦面における前記周方向の図心に対して前記周方向にずれて配置され、
前記永久磁石は、前記永久磁石が軸方向に対して傾斜した状態で前記貼り付け面が、前記第1多角柱部の前記平坦面および前記第2多角柱部の前記平坦面に貼り付けられている永久磁石式回転電機の回転子。 - 同一の前記永久磁石の前記貼り付け面が貼り付けられる前記第1多角柱部の前記平坦面および前記第2多角柱部の前記平坦面は、同一平面上に配置されている請求項1に記載の永久磁石式回転電機の回転子。
- 軸方向に視た場合の一方の前記多角柱部の形状は、中心線に対して非対称であり、前記中心線を中心に表裏反転したときに、軸方向に視た場合の他方の前記多角柱部の形状と一致する請求項2に記載の永久磁石式回転電機の回転子。
- 軸方向に視た場合の前記多角柱部の外側形状は、極数の2倍の数の頂点を有する多角形状である請求項3に記載の永久磁石式回転電機の回転子。
- 前記回転子鉄心は、前記永久磁石よりも周方向片側に設けられた周方向位置決め部をさらに有している請求項3に記載の永久磁石式回転電機の回転子。
- 前記回転子鉄心は、前記周方向位置決め部に設けられ前記永久磁石よりも径方向外側に設けられた離脱防止部をさらに有している請求項5に記載の永久磁石式回転電機の回転子。
- 前記永久磁石は、側面形状が長方形形状に形成されている請求項1から請求項6までの何れか一項に記載の永久磁石式回転電機の回転子。
- 前記回転子鉄心は、前記永久磁石よりも長手方向外側に設けられた軸方向位置決め部をさらに有している請求項7に記載の永久磁石式回転電機の回転子。
- 複数の前記回転子鉄心は、軸方向に連なって設けられており、
軸方向に隣り合う2つの前記回転子鉄心は、互いに軸方向に接する端部における軸方向に垂直な面を中心にして、互いに対称な形状となるように連結され、
連結された2つの前記回転子鉄心のそれぞれに貼り付けられた前記永久磁石は、径方向から視た場合にV字状となるように配置されている請求項1から請求項8までの何れか一項に記載の永久磁石式回転電機の回転子。 - 請求項1から請求項9までの何れか一項に記載の回転子と、
空隙を介して前記回転子に対して対向して配置された固定子鉄心を有する固定子と
を備えた永久磁石式回転電機。
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KR1020187036645A KR102070565B1 (ko) | 2016-06-24 | 2017-03-27 | 영구자석식 회전 전기 기계의 회전자 및 영구자석식 회전 전기 기계 |
US16/303,780 US10770939B1 (en) | 2016-06-24 | 2017-03-27 | Rotor for permanent magnet rotary electric machine and permanent magnet rotary electric machine |
JP2018523330A JP6545380B2 (ja) | 2016-06-24 | 2017-03-27 | 永久磁石式回転電機の回転子および永久磁石式回転電機 |
CN201780038077.XA CN109314422B (zh) | 2016-06-24 | 2017-03-27 | 永磁铁式旋转电机的转子及永磁铁式旋转电机 |
DE112017003124.9T DE112017003124B4 (de) | 2016-06-24 | 2017-03-27 | Rotor für rotierende elektrische Permanentmagnetmaschine und rotierende elektrische Permanentmagnetmaschine |
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CN109314422A (zh) | 2019-02-05 |
US10770939B1 (en) | 2020-09-08 |
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KR102070565B1 (ko) | 2020-01-29 |
JP6545380B2 (ja) | 2019-07-17 |
US20200274406A1 (en) | 2020-08-27 |
JPWO2017221496A1 (ja) | 2018-08-30 |
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