WO2020032395A1 - 로터 및 이를 구비하는 모터 - Google Patents

로터 및 이를 구비하는 모터 Download PDF

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Publication number
WO2020032395A1
WO2020032395A1 PCT/KR2019/008099 KR2019008099W WO2020032395A1 WO 2020032395 A1 WO2020032395 A1 WO 2020032395A1 KR 2019008099 W KR2019008099 W KR 2019008099W WO 2020032395 A1 WO2020032395 A1 WO 2020032395A1
Authority
WO
WIPO (PCT)
Prior art keywords
protrusion
rotor core
magnet
rotor
center
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/008099
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
한지훈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Priority to US17/261,120 priority Critical patent/US11757318B2/en
Priority to JP2021505209A priority patent/JP7336508B2/ja
Priority to EP19847862.0A priority patent/EP3836357A4/en
Priority to CN201980053814.2A priority patent/CN112585844B/zh
Publication of WO2020032395A1 publication Critical patent/WO2020032395A1/ko
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • 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
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • 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

  • Embodiments relate to a rotor and a motor having the same.
  • a motor is a device that obtains rotational force by converting electrical energy into mechanical energy, and is widely used in vehicles, household appliances, and industrial equipment.
  • the motor may include a housing, a shaft, a stator disposed inside the housing, a rotor installed on an outer circumferential surface of the shaft, and the like.
  • the stator of the motor induces electrical interaction with the rotor to induce rotation of the rotor.
  • the shaft also rotates in accordance with the rotation of the rotor.
  • the motor can be used in a device for ensuring the stability of steering of an automobile.
  • the motor may be used in a motor for a vehicle such as an electronic power steering system (EPS).
  • EPS electronic power steering system
  • the motor can also be used in a clutch actuator.
  • the rotor is provided with a plurality of magnets, and according to the magnet installation method, an SPM (Surface Permanent Magnet) in which a magnet is attached to a surface of the rotor core and an IPM (Interior Permanent Magnet) type magnet in which the magnet is inserted into the rotor core. ) Rotors of the type.
  • SPM Surface Permanent Magnet
  • IPM Interior Permanent Magnet
  • the magnet is coupled to the rotor core only by bonding, so that when the bonding force is weakened, the magnet is separated from the rotor core.
  • the embodiment provides a rotor and a motor including the same, which prevents the detachment of the magnet attached to the outer circumferential surface of the rotor core by using a protrusion to buffer an amount of change in the outer diameter of the rotor core according to the indentation of the shaft.
  • the rotor core And a plurality of magnets disposed to be spaced apart from each other on the outer circumferential surface of the rotor core, wherein the rotor core includes a body and a protrusion protruding inwardly at an angle from an inner circumferential surface of the body, the inner circumferential surface of the body and the This is achieved by a rotor in which a predetermined gap G1 is formed between the ends of the projections.
  • the protrusion includes a first protrusion and a second protrusion protruding at an angle from the inner circumferential surface of the body, the first protrusion on the basis of an imaginary line connecting the center of the rotor core and the center of the magnet.
  • the second protrusion may be symmetrically disposed.
  • the protrusion may include a first protrusion and a second protrusion protruding at an angle from the inner circumferential surface of the body, and end portions of the first protrusion and the second protrusion may be spaced apart from each other based on the circumferential direction.
  • Can protrude may include a first protrusion and a second protrusion protruding at an angle from the inner circumferential surface of the body, and end portions of the first protrusion and the second protrusion may be spaced apart from each other based on the circumferential direction.
  • An end of the first protrusion and an end of the second protrusion may form a first angle ⁇ 1 based on the center C of the rotor core, and one side of the magnet based on the center C of the rotor core.
  • the corner and the other corner form a second site angle ⁇ 2, and the first site angle ⁇ 1 may be smaller than the second site angle ⁇ 2.
  • the center of the magnet and the center of the first protrusion and the second protrusion may be disposed on the same radial line with respect to the circumferential direction, and the width of the magnet may be larger than the width of the protrusion.
  • the rotor core may further include a hole formed in the body.
  • the hole may be disposed between the protrusion and the magnet in a radial direction.
  • an end of the first protrusion and an end of the second protrusion may form a first angle ⁇ 1 based on the center C of the rotor core, and the hole of the hole may be referred to the center C of the rotor core.
  • One corner and the other corner may form a third site angle ⁇ 3, and the first site angle ⁇ 1 may be greater than the third site angle ⁇ 3.
  • the center of the hole may be disposed on an imaginary line L connecting the center of the magnet and the center of the rotor core.
  • the width of the hole may be equal to the width between one point of the protrusion and another point that meets the inner circumferential surface of the body based on the circumferential direction.
  • the height H1 of the protrusion in the axial direction based on the lower surface of the body may be smaller than the height H2 of the body.
  • the height H2 of the body may be 1.9 to 2.0 times the height H1 of the protrusion.
  • the rotor may further include first and second cans respectively covering upper and lower portions of the rotor core to which the magnet is attached, and the second can may be disposed to overlap with the protrusion part based on a radial direction. have.
  • the rotor core may further include a recess formed inwardly in the outer peripheral surface of the body, the width of the groove may be smaller than the width of the magnet.
  • a predetermined gap G2 may be formed between the inner surface of the magnet and the inner surface of the groove.
  • the rotor core further includes a guide protruding outward from the outer circumferential surface, the magnet may be disposed between the guide.
  • the object A rotor in which the shaft is disposed in the center; A stator disposed on an outer side of the rotor, the rotor including a rotor core and a plurality of magnets disposed to be spaced apart from each other on an outer circumferential surface of the rotor core, wherein the rotor core is predetermined on a body and an inner circumferential surface of the body. It includes a protrusion projecting inwardly at an angle at an angle, and is achieved by a motor in which a predetermined gap G1 is formed between the inner circumferential surface of the body and the end of the protrusion.
  • the outer circumferential surface of the shaft is in contact with the protrusion, and when the shaft is inserted, the gap G1 may be reduced.
  • the height H1 of the protrusion in the axial direction with respect to the lower surface of the body may be smaller than the height H2 of the body.
  • the protrusion may include first and second protrusions protruding at an angle from an inner circumferential surface of the body, and end portions of the first and second protrusions may be spaced apart from each other based on a circumferential direction. Can protrude.
  • end portions of each of the first protrusion and the second protrusion may be formed in a curved surface, and the shaft may be in linear contact with each of the first protrusion and the second protrusion in the axial direction.
  • the rotor and the motor including the same may minimize the amount of change in the outer circumferential surface of the rotor core by using a protrusion. Thereby, detachment of the magnet attached to the outer peripheral surface of the rotor core can be prevented.
  • the rotor core may minimize a change in the outer circumferential surface of the rotor core due to the indentation of the shaft using a hole.
  • the rotor core may use a groove to minimize the change in the outer peripheral surface of the rotor core due to the indentation of the shaft.
  • first can and the second can it is possible to reduce the production cost of the can.
  • separation of the magnet may be prevented by using the first can and the second can.
  • FIG. 1 is a view showing a motor according to an embodiment
  • FIG. 2 is a perspective view illustrating a rotor of a motor according to an embodiment
  • FIG. 3 is a side view showing the rotor of the motor according to the embodiment
  • FIG. 4 is a perspective view showing a rotor core and a magnet in the rotor of the motor according to the embodiment
  • FIG. 5 is a plan view showing a rotor core and a magnet in the rotor of the motor according to the embodiment
  • FIG. 6 is an enlarged view illustrating region A of FIG. 5;
  • FIG. 7 is a perspective view illustrating a rotor core of a rotor disposed in a motor according to the embodiment
  • FIG. 8 is a plan view illustrating a rotor core of a rotor disposed in a motor according to an embodiment
  • FIG. 9 is a cross-sectional view showing the rotor core of the rotor disposed in the motor according to the embodiment.
  • FIG. 10 is an enlarged view illustrating region B of FIG. 9;
  • FIG. 11 is a view showing a rotor of a motor according to a comparative example
  • FIG. 12 is a graph showing the outer diameter deformation amount of the rotor core of the motor according to the comparative example and the rotor core disposed in the motor according to the embodiment.
  • the technical idea of the present invention is not limited to some embodiments described, but may be embodied in different forms, and within the technical idea of the present invention, one or more of the components may be selectively selected between the embodiments. Can be combined and substituted.
  • first, second, A, B, (a), and (b) may be used.
  • a component when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only connected, coupled or connected directly to the other component, It may also include the case where the 'component' is 'connected', 'coupled' or 'connected' by another component between the other components.
  • top (bottom) or the bottom (bottom) is not only when two components are in direct contact with each other, but also one. It also includes a case where the above-described further components are formed or disposed between two components.
  • up (up) or down (down) may include the meaning of the down direction as well as the up direction based on one component.
  • FIG. 1 is a view showing a motor according to an embodiment.
  • the x direction means the axial direction and the y direction means the radial direction.
  • the axial direction and the radial direction are perpendicular to each other.
  • the axial direction may be a length direction of the shaft 500.
  • the motor 1 includes a housing 100 having an opening formed at one side thereof, a cover 200 disposed on the housing 100, and a rotor 300 coupled to the shaft 500.
  • the rotation of the stator 400 disposed inside the housing 100, the shaft 500 rotating together with the rotor 300, the bus bar 600 disposed above the stator 400, and the rotor 300 are rotated. It may include a sensor unit 700 for detecting.
  • Such a motor 1 can be used for a clutch actuator.
  • the motor 1 may be a motor used for EPS.
  • the EPS Electric Power Steering System
  • the housing 100 and the cover 200 may form an outer shape of the motor 1.
  • an accommodation space may be formed by combining the housing 100 and the cover 200.
  • the rotor 300, the stator 400, the shaft 500, the bus bar 600, the sensor unit 700, and the like may be disposed in the accommodation space.
  • the shaft 500 is rotatably disposed in the accommodation space.
  • the motor 1 may further include a bearing 10 disposed on the upper and lower portions of the shaft 500, respectively.
  • the housing 100 may be formed in a cylindrical shape.
  • the housing 100 may accommodate the rotor 300, the stator 400, and the like therein.
  • the shape or material of the housing 100 may be variously modified.
  • the housing 100 may be formed of a metal material that can withstand high temperatures well.
  • the cover 200 may be disposed on the opening surface of the housing 100, that is, the upper portion of the housing 100 to cover the opening of the housing 100.
  • the rotor 300 may be disposed inside the stator 400, and the shaft 500 may be coupled to the center by a press-fit method.
  • the rotor 300 may be rotatably disposed on the stator 400.
  • the inner side may mean the direction of the center (C) and the outer side may mean a direction opposite to the inner side.
  • FIG. 2 is a perspective view illustrating a rotor of a motor according to an embodiment
  • FIG. 3 is a side view illustrating a rotor of a motor according to an embodiment.
  • the rotor 300 may include a rotor core 310 and a plurality of magnets 320 disposed on an outer circumferential surface of the rotor core 310.
  • the rotor 300 is formed of a first can 330 disposed above the rotor core 310 to which the magnet 320 is attached and a rotor disposed below the rotor core 310 to which the magnet 320 is attached. It may further include two cans 340.
  • FIG. 4 is a perspective view illustrating a rotor core and a magnet in the rotor of the motor according to the embodiment
  • FIG. 5 is a plan view illustrating the rotor core and the magnet in the rotor of the motor according to the embodiment
  • a plurality of magnets 320 may be disposed on the outer circumferential surface of the rotor core 310 along the circumferential direction.
  • a plurality of magnets 320 may be disposed on the outer circumferential surface of the rotor core 310 to be spaced apart from each other at predetermined intervals.
  • the magnet 320 may be referred to as a rotor magnet or a drive magnet.
  • the rotor core 310 may be implemented in a shape in which a plurality of plates in the form of a circular thin steel sheet are stacked or in a single cylindrical shape. In the center C of the rotor core 310, a hole to which the shaft 500 is coupled may be formed.
  • FIG. 7 is a perspective view showing the rotor core of the rotor disposed in the motor according to the embodiment
  • Figure 8 is a plan view showing the rotor core of the rotor disposed in the motor according to the embodiment
  • Figure 9 is arranged in the motor according to the embodiment It is sectional drawing which shows the rotor core of the rotor used
  • FIG. 10 is an enlarged view which shows area
  • the rotor core 310 may protrude inwardly at an angle from the inner circumferential surface 311a of the body 311, the body 311, and the outer circumferential surface of the body 311.
  • a plurality of guides 313 protruding outward from the 311b may be included.
  • the rotor core 310 may further include a hole 314 formed in the body 311.
  • the rotor core 310 may further include a groove 315 recessed inwardly in the outer circumferential surface 311b of the body 311.
  • the body 311, the protrusion 312 and the guide 313 may be integrally formed.
  • the body 311 may be formed in a pipe shape.
  • the body 311 may be formed in a planar ring, circle or donut shape.
  • a hole may be formed in the center of the body 311 for disposition of the shaft 500.
  • the protrusion 312 may be formed to protrude inwardly at an angle from the inner circumferential surface 311a of the body 311. As shown in FIG. 5, since the protrusion 312 protrudes inclined at a predetermined angle, a predetermined gap G1 is formed between the inner circumferential surface 311a of the body 311 and the end of the protrusion 312. Can be.
  • the gap G1 formed between the inner circumferential surface 311a of the body 311 and the end of the protrusion 312 may be referred to as a first gap.
  • the protrusion 312 may be in contact with the outer circumferential surface of the shaft 500.
  • the gap G1 may be reduced.
  • the shaft 500 is coupled to the rotor core 310 by a press-fit method, since the radius of the circle is smaller than the radius of the shaft 500 based on an imaginary circle connecting the ends of the protrusions 312, The gap G1 may be reduced when the shaft 500 is press-fitted.
  • the protrusion 312 may prevent the magnet 320 from being separated by minimizing the amount of deformation of the outer diameter of the rotor core 310 due to the pressing force.
  • the protrusion 312 may be provided as a first protrusion 312a and a second protrusion 312b. However, it is not necessarily limited thereto.
  • the protrusion 312 may be provided as any one of the first protrusion 312a and the second protrusion 312b.
  • the protrusions protruding obliquely in the direction in which the ends of each of the first protrusion 312a and the second protrusion 312b are spaced apart from each other based on the circumferential direction ( 312).
  • each of the first protrusion 312a and the second protrusion 312b may protrude obliquely at a predetermined angle ⁇ from the inner circumferential surface 311a of the body 311.
  • each of the first protrusion 312a and the second protrusion 312b may form a predetermined angle ⁇ based on an imaginary line L radially passing through the center C of the rotor core 310. Can be.
  • each of the first protrusion 312a and the second protrusion 312b may protrude in a direction in which they are spaced apart from each other based on the circumferential direction.
  • the first protrusion 312a and the second protrusion 312b may protrude obliquely in different directions in the circumferential direction.
  • the first protrusion 312a and the second protrusion 312b may be symmetrically disposed with respect to the line L.
  • the end of the first protrusion 312a and the end of the second protrusion 312b form the first angle ⁇ 1 based on the center C of the rotor core 310, and the rotor core ( One corner and the other corner of the magnet 320 may form a second angle ⁇ 2 based on the center C of 310, and the first angle ⁇ 1 may be smaller than the second angle ⁇ 2. .
  • a first site angle ⁇ 1 may be disposed between the second site angle ⁇ 2.
  • an imaginary line L1 connecting the center C of the rotor core 310 to the end of the first protrusion 312a and the end of the second protrusion 312b may be formed, and the first angle ⁇ 1 may be an acute angle between the lines L1.
  • an imaginary line L2 may be formed to connect the center C of the rotor core 310 and the one edge and the other edge of the magnet 320, respectively, and the second angle ⁇ 2 may be the line L2. Acute angle between
  • the center C1 of the magnet 320 is disposed on the imaginary line L passing through the center C of the rotor core 310 in the radial direction, and the first protrusion (based on the line L) is disposed.
  • 312a and the second protrusion 312b may be symmetrically disposed.
  • a center C2 of the protrusion 312 formed through the first protrusion 312a and the second protrusion 312b may also be disposed on the line L.
  • the center C2 of the protrusion 312 may be the center of an area where the inner circumferential surface 311a and the protrusion 312 of the body 311 meet with respect to the circumferential direction.
  • the center C1 of the magnet 320 and the center C2 of the protrusion 312 may be disposed on the same radial line L.
  • FIG. 5 the width W1 of the protrusion 312 is smaller than the width W2 of the magnet 320.
  • the protrusion 312 when viewed in a radial direction, the protrusion 312 may be disposed to overlap one region of the magnet 320. Accordingly, the pushing force applied to the magnet 320 by the shaft 500 in the radial direction may be transmitted by being buffered by the protrusion 312.
  • the protrusion 312 of the rotor 300 allows the shaft 500 to be press-fitted to the rotor core 210 while being coupled to the pusher to buffer the pressure input to prevent the magnet 320 from being separated.
  • the protrusion 312 may be formed to have a predetermined height in the axial direction based on the lower surface 311c of the body 311. In this case, the axial height of the protrusion 312 may be smaller than the axial height of the body 311 to reduce the amount of contact with the shaft 500.
  • the height H1 of the protrusion 312 in the axial direction based on the lower surface 311c of the body 311 may be smaller than the height H2 of the body 311.
  • the height H2 of the body 311 may be 1.9 to 2.0 times the height H1 of the protrusion 312.
  • the height H2 of the body 311 may be 1.93 times the height H1 of the protrusion 312.
  • the height H1 of the protrusion 312 may be called a first height
  • the height H2 of the body 311 may be called a second height.
  • the contact with the shaft 500 is minimized by the protrusion 312 formed at the first height H1, thereby minimizing the pressure input applied to the rotor core 310.
  • the second height H2 may be formed to be 1.9 to 2.0 times the first height H1 to prevent tilting of the shaft 500 due to a force applied radially to the shaft 500.
  • end portions of each of the first protrusion 312a and the second protrusion 312b may be rounded in consideration of contact with the shaft 500. Accordingly, the end portion of each of the first protrusion 312a and the second protrusion 312b and the shaft 500 may be in line contact in the axial direction.
  • each of the first protrusion 312a and the second protrusion 312b may be formed into a curved surface having a predetermined curvature, the ends and the shafts of the first protrusion 312a and the second protrusion 312b respectively. 500 may be in line contact in the axial direction.
  • the rotor core 310 may include a guide 313 extending outward from the outer circumferential surface 311b of the body 311.
  • the guide 313 may be integrally formed with the rotor core 310.
  • the guide 313 may be formed along the axial direction from the lower surface 311c to the upper surface 311d of the body 311.
  • Guide 313 guides the placement of magnet 320. Accordingly, the magnet 320 may be disposed between the guides 313. At this time, the radial protrusion length of the guide 313 based on the outer circumferential surface 311b of the rotor core 310 is smaller than the radial thickness of the magnet 320.
  • the rotor core 310 includes a guide 313 as an example, but is not necessarily limited thereto.
  • the guide 313 may be deleted from the rotor core 310.
  • the guide 313 is formed in the rotor core 310, since the area in which the adhesive member may be applied is extended, the fixing force of the magnet 320 may be improved.
  • the hole 314 may be formed in the body 311. As shown in FIG. 9, the hole 314 may be formed through the body 311 in the axial direction. For example, the hole 314 may be formed along the axial direction from the lower surface 311c to the upper surface 311d of the body 311.
  • the hole 314 may be disposed between the protrusion 312 and the magnet 320 based on the radial direction.
  • the hole 314 may be formed as a planar long hole formed long in the circumferential direction.
  • One side edge and the other edge of the hole 314 on a plane with respect to the center C of the rotor core 310 may form a third site angle ⁇ 3. Accordingly, the first site angle ⁇ 1 may be greater than the third site angle ⁇ 3. That is, the third site angle ⁇ 3 may be smaller than the first site angle ⁇ 1, and a third site angle ⁇ 3 may be disposed between the first site angle ⁇ 1.
  • an imaginary line L3 connecting the center C of the rotor core 310 and the one corner and the other corner of the hole 314 may be formed, and the third angle ⁇ 3 is the line L3.
  • the center C3 of the hole 314 may be disposed on an imaginary line L connecting the center C1 of the magnet and the center C of the rotor core 310.
  • the center C2 of the protrusion 312 may also be disposed on the virtual line L.
  • the center C2 of the protrusion 312 may be the center of an area where the inner circumferential surface 311a and the protrusion 312 of the body 311 meet with respect to the circumferential direction.
  • the center C2 of the protrusion 312 is between one point P of the protrusion 312 where the inner circumferential surface 311a of the body 311 meets the protrusion 312 and another point P based on the circumferential direction. It may be central.
  • the width W3 of the hole 314 may be smaller than the width W1 of the protrusion 312. At this time, the width W3 of the hole 314 may be equal to the width between one point P of the protrusion 312 where the inner circumferential surface 311a of the body 311 and the protrusion 312 meet and another point P. have. Accordingly, the pressing force may be transmitted to the hole 314 in the radial direction, but may be buffered by the hole 314.
  • the hole 314 may have a predetermined width in the radial direction.
  • the radial width of the hole 314 may be adjusted in consideration of the strength of the body 311 and the buffer force against the pressure input.
  • the groove 315 may be recessed inwardly on the outer circumferential surface 311b of the body 311. Accordingly, the inner surface 315a may be formed to be spaced inward from the outer circumferential surface 311b of the body 311. In this case, the groove 315 may be formed along the axial direction from the lower surface 311c to the upper surface 311d of the body 311.
  • the groove 315 may be disposed outside the hole 314 based on the radial direction.
  • One side edge and the other edge of the groove 315 on a plane with respect to the center C of the rotor core 310 may form a fourth site angle ⁇ 4. Accordingly, the first site angle ⁇ 1 may be smaller than the fourth site angle ⁇ 4. In this case, the first site angle ⁇ 1 may be disposed between the fourth site angle ⁇ 4.
  • an imaginary line L4 may be formed between the center C of the rotor core 310 and the one corner and the other corner of the groove 315, respectively, and the fourth angle ⁇ 4 may be the line L4.
  • center C4 of the groove 315 may be disposed on an imaginary line L connecting the center C1 of the magnet and the center C of the rotor core 310.
  • the width W4 of the groove 315 may be larger than the width W1 of the protrusion 312 or the width W3 of the hole 314. However, the width W4 of the groove 315 may be smaller than the width W2 of the magnet 320. Accordingly, the pushing force may be transmitted to the groove 315 side in the radial direction but may be buffered by the groove 315.
  • an adhesive member (not shown) may be disposed in the groove 315.
  • the magnet 320 may be disposed on the outer circumferential surface 311b of the rotor core 310 to be spaced apart from each other at predetermined intervals.
  • the magnet 320 may be attached to the outer circumferential surface 311b of the rotor core 310 by using an adhesive member such as a bond.
  • an adhesive member such as a bond.
  • the adhesive member may be filled and hardened in the groove 315, the fixing force of the magnet 320 in the circumferential direction may be improved.
  • a predetermined gap is formed between the inner surface 321 of the magnet 320 and the inner surface 315a of the groove 315. (G2) may be formed.
  • the gap G2 may be referred to as a second gap.
  • the gap G2 may be reduced. Accordingly, the pressing force applied to the magnet 320 may be buffered by the gap G2. In addition, the amount of change in the outer circumferential surface 331b of the body 311 may be minimized by the gap G2.
  • FIG. 11 is a diagram illustrating a rotor of a motor according to a comparative example
  • FIG. 12 is a graph illustrating an outer diameter deformation amount of a rotor core of a motor according to a comparative example and a rotor core disposed in a motor according to an embodiment.
  • the rotor disposed in the motor 2 according to the comparative example may include a rotor core 310a and a magnet 320 disposed on an outer circumferential surface of the rotor core 310a.
  • the projections 312c and the holes 314a of the motor 2 according to the comparative example are compared.
  • the protrusion 312c of the motor 2 according to the comparative example has a rectangular shape and cannot shape the pressure input generated when the shaft 500 is pressed, and the shape of the hole 314a is circular. It is different from the rotor core 310 of the motor 1 according to the embodiment in that there is.
  • the rotor core 310 of the motor 1 may further reduce the outer diameter deformation amount of the rotor core 310 through the protrusion 312 and the hole 314 to further cushion the stress acting on the magnet 320. have.
  • the groove core 315 is added to the rotor core 310 of the motor 1 in addition to the protrusion 312 and the hole 314, the amount of deformation of the outer diameter of the rotor core 310 by the indentation of the shaft 500 is increased. Further reduction can further reduce the stress on the magnet 320. Accordingly, the rotor core 310 may prevent the magnet 320 from being separated.
  • the first can 330 and the second can 340 protects the rotor core 310 and the magnet 320 from external shocks, physical and chemical stimuli, while foreign matter flows into the rotor core 310 and the magnet 320. You can block it.
  • first can 330 and the second can 340 prevent the magnet 320 from being separated from the rotor core 310.
  • the first can 330 and the second can 340 may be formed in a cup shape having a hole formed at the center thereof, and disposed to cover the upper and lower portions of the rotor core 310 to which the magnet 320 is attached.
  • an end portion of the first can 330 and an end portion of the second can 340 may be spaced apart in the axial direction.
  • the name can can be called a cap.
  • the first can 330 may be called a first cap
  • the second can 340 may be called a second cap.
  • the first can 330 and the second can 340 may be formed in the same shape. Accordingly, since the first can 330 and the second can 340 can be shared, production costs can be minimized. However, the material of the second can 340 may be different from that of the first can 330 in consideration of the position of the protrusion 312. Alternatively, in consideration of the position of the protrusion 312, the second can 340 may have a higher strength in the radial direction than the first can 330. Accordingly, the radial thickness of the second can 340 may be thicker than the radial thickness of the first can 330.
  • the second can 340 may be disposed to overlap with the protrusion 312 based on the radial direction.
  • the second can 340 may support the outer surface 322 of the magnet 320. Therefore, even though the pressing force formed by the press-in of the shaft 500 is radially applied through the protrusion 312 to be transmitted to the magnet 320, separation of the magnet 320 by the second can 340 is prevented. Is prevented.
  • the stator 400 may be disposed inside the housing 100. In this case, the stator 400 may be supported on the inner circumferential surface of the housing 100.
  • the stator 400 is disposed outside the rotor 300. That is, the rotor 300 may be disposed inside the stator 400.
  • the stator 400 may include a stator core 410, an insulator 420 disposed on the stator core 410, and a coil 430 wound around the insulator 420.
  • a coil 430 forming a rotating magnetic field may be wound around the stator core 410.
  • the stator core 410 may be composed of one core or a plurality of split cores may be combined.
  • the stator core 410 may be formed of a plurality of plates stacked in the form of a thin steel sheet, but is not necessarily limited thereto.
  • the stator core 410 may be formed as one single piece.
  • the stator core 410 may include a cylindrical yoke (not shown) and a plurality of teeth (not shown) protruding radially from the yoke.
  • the coil 430 may be wound around the tooth.
  • the insulator 420 insulates the stator core 410 from the coil 430. Accordingly, the insulator 420 may be disposed between the stator core 410 and the coil 430.
  • the coil 430 may be wound around the stator core 410 on which the insulator 420 is disposed.
  • the shaft 500 may be rotatably disposed in the housing 100 by the bearing 10. In addition, the shaft 500 may rotate together with the rotation of the rotor 300.
  • the bus bar 600 may be disposed above the stator 400.
  • bus bar 600 may be electrically connected to the coil 430 of the stator 400.
  • the bus bar 600 may include a bus bar body (not shown) and a plurality of terminals (not shown) disposed inside the bus bar body.
  • the bus bar body may be a mold formed through injection molding.
  • Each of the terminals may be electrically connected to the coil 430 of the stator 400.
  • the sensor unit 700 detects the magnetic force of the sensing magnet installed to be rotatable interlocked with the rotor 300 to detect the current position of the rotor 300 so as to detect the rotation of the shaft 500.
  • the sensor unit 700 may include a sensing magnet assembly 710 and a printed circuit board (PCB) 720.
  • PCB printed circuit board
  • the sensing magnet assembly 710 is coupled to the shaft 500 to cooperate with the rotor 300 to detect the position of the rotor 300.
  • the sensing magnet assembly 710 may include a sensing magnet and a sensing plate.
  • the sensing magnet may include a main magnet disposed in a circumferential direction adjacent to a hole forming an inner circumferential surface and a sub magnet formed at an edge thereof.
  • the main magnet may be arranged in the same manner as the drive magnet inserted into the rotor 300 of the motor.
  • the sub-magnet is more subdivided than the main magnet and consists of many poles. As a result, the sub-magnet makes it possible to divide and measure the rotation angle more precisely, and to induce driving of the motor more smoothly.
  • the sensing plate may be formed of a metal material of a disc shape.
  • the sensing magnet may be coupled to the upper surface of the sensing plate.
  • the sensing plate may be coupled to the shaft 500.
  • the sensing plate is formed with a hole through which the shaft 500 passes.
  • a sensor for detecting a magnetic force of the sensing magnet may be disposed on the printed circuit board 720.
  • the sensor may be provided as a Hall IC.
  • the sensor may generate a sensing signal by detecting a change in the N pole and the S pole of the sensing magnet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/KR2019/008099 2018-08-08 2019-07-03 로터 및 이를 구비하는 모터 Ceased WO2020032395A1 (ko)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US17/261,120 US11757318B2 (en) 2018-08-08 2019-07-03 Rotor and motor having same
JP2021505209A JP7336508B2 (ja) 2018-08-08 2019-07-03 ロータおよびこれを具備するモータ
EP19847862.0A EP3836357A4 (en) 2018-08-08 2019-07-03 ROTOR AND MOTOR WITH IT
CN201980053814.2A CN112585844B (zh) 2018-08-08 2019-07-03 转子及具有该转子的电机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0092178 2018-08-08
KR1020180092178A KR102593909B1 (ko) 2018-08-08 2018-08-08 로터 및 이를 구비하는 모터

Publications (1)

Publication Number Publication Date
WO2020032395A1 true WO2020032395A1 (ko) 2020-02-13

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Country Link
US (1) US11757318B2 (https=)
EP (1) EP3836357A4 (https=)
JP (1) JP7336508B2 (https=)
KR (1) KR102593909B1 (https=)
CN (1) CN112585844B (https=)
WO (1) WO2020032395A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022049683A (ja) * 2020-09-16 2022-03-29 マレッリ・ユーロプ・ソチエタ・ペル・アツィオーニ 電動機用の特に駆動力のために改良された回転子及び関連する電動機

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114221580B (zh) * 2021-12-21 2023-01-31 苏州苏磁智能科技有限公司 磁悬浮装置以及转子位置调节方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6265802B1 (en) * 1996-04-15 2001-07-24 Warner Electric Technology, Inc. Laminated rotor assembly and method for a dynamoelectric machine
US20060138877A1 (en) * 2004-11-30 2006-06-29 Makoto Akabane Rotor core for motor and small motor
KR20090105958A (ko) * 2007-02-01 2009-10-07 로베르트 보쉬 게엠베하 전기 기계
KR20130011664A (ko) * 2011-07-22 2013-01-30 엘지이노텍 주식회사 모터의 적층 로터 코어
KR20170045998A (ko) * 2015-10-20 2017-04-28 엘지이노텍 주식회사 로터 조립체 및 이를 포함하는 모터

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0993844A (ja) * 1995-09-21 1997-04-04 Fanuc Ltd 同期電動機のロータ
JP2007181270A (ja) 2005-12-27 2007-07-12 Toyota Motor Corp 回転電機のロータ
JP4930127B2 (ja) * 2007-03-20 2012-05-16 パナソニック株式会社 表面磁石型ロータおよびその製造方法
JP2010166683A (ja) * 2009-01-15 2010-07-29 Fujitsu General Ltd 永久磁石型モータ
KR20120078913A (ko) * 2011-01-03 2012-07-11 엘지이노텍 주식회사 모터
JP5634383B2 (ja) * 2011-11-18 2014-12-03 三菱電機株式会社 回転電機用ロータおよび電動パワーステアリング用モータ
KR101931356B1 (ko) * 2012-01-19 2018-12-24 삼성전자주식회사 모터와 그 로터
JP5850437B2 (ja) 2013-03-11 2016-02-03 三菱電機株式会社 回転子および当該回転子を有する回転電機、更には当該回転子の製造方法
JP5958439B2 (ja) * 2013-08-29 2016-08-02 株式会社デンソー 回転子、および、これを用いた回転電機
DE102014110439A1 (de) * 2014-07-24 2016-01-28 Thyssenkrupp Presta Teccenter Ag Rotor für einen Elektromotor
KR102452160B1 (ko) * 2015-07-21 2022-10-11 엘지이노텍 주식회사 로터 및 이를 포함하는 모터
KR102489300B1 (ko) * 2015-09-14 2023-01-17 엘지이노텍 주식회사 캔부재 및 이를 포함하는 로터 조립체
KR102485022B1 (ko) * 2015-10-26 2023-01-05 엘지이노텍 주식회사 로터 코어 조립체, 로터 조립체 및 이를 포함하는 모터
JP6332376B2 (ja) * 2016-09-21 2018-05-30 株式会社富士通ゼネラル 永久磁石電動機
DE202017100697U1 (de) * 2017-02-09 2017-02-20 Wittur Holding Gmbh Elektromotor mit definiert verklebten Permanentmagneten

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6265802B1 (en) * 1996-04-15 2001-07-24 Warner Electric Technology, Inc. Laminated rotor assembly and method for a dynamoelectric machine
US20060138877A1 (en) * 2004-11-30 2006-06-29 Makoto Akabane Rotor core for motor and small motor
KR20090105958A (ko) * 2007-02-01 2009-10-07 로베르트 보쉬 게엠베하 전기 기계
KR20130011664A (ko) * 2011-07-22 2013-01-30 엘지이노텍 주식회사 모터의 적층 로터 코어
KR20170045998A (ko) * 2015-10-20 2017-04-28 엘지이노텍 주식회사 로터 조립체 및 이를 포함하는 모터

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022049683A (ja) * 2020-09-16 2022-03-29 マレッリ・ユーロプ・ソチエタ・ペル・アツィオーニ 電動機用の特に駆動力のために改良された回転子及び関連する電動機

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EP3836357A4 (en) 2021-09-15
KR102593909B1 (ko) 2023-10-26
KR20200017045A (ko) 2020-02-18
EP3836357A1 (en) 2021-06-16
US11757318B2 (en) 2023-09-12
US20210313855A1 (en) 2021-10-07
CN112585844B (zh) 2024-07-19
CN112585844A (zh) 2021-03-30
JP7336508B2 (ja) 2023-08-31
JP2021535709A (ja) 2021-12-16

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