WO2020045937A1 - 모터 - Google Patents
모터 Download PDFInfo
- Publication number
- WO2020045937A1 WO2020045937A1 PCT/KR2019/010883 KR2019010883W WO2020045937A1 WO 2020045937 A1 WO2020045937 A1 WO 2020045937A1 KR 2019010883 W KR2019010883 W KR 2019010883W WO 2020045937 A1 WO2020045937 A1 WO 2020045937A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator core
- disposed
- rotor
- adhesive member
- sheets
- 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
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/021—Magnetic cores
- H02K15/022—Magnetic cores with salient poles
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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
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
- B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
-
- 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
-
- 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
Definitions
- Embodiments relate to a motor.
- 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 on an inner circumferential surface of the housing, a rotor installed on an outer circumferential surface of the shaft, and the like.
- the stator induces electrical interaction with the rotor to induce rotation of the rotor.
- the rotor may include a rotor core and a plurality of magnets disposed in the rotor core.
- a multipole motor there is a problem in that noise and vibration are large in the stator.
- the stator may be overmolded to reduce the noise and vibration, but there is a problem in that the production cost increases.
- Embodiments provide a motor that can reduce noise and vibration by implementing a rigid design using an adhesive member such as a bond when laminating sheets to form a stator core.
- the object A rotor engaged with the shaft; And a stator disposed outside the rotor, wherein the stator includes a stator core formed by arranging a plurality of unit stator cores in a circumferential direction and a coil wound around the stator core, and formed by stacking a plurality of sheets.
- the unit stator core includes a yoke including a plurality of holes, a tooth protruding in a radial direction from the yoke, and an adhesive member disposed in the plurality of holes, each of the plurality of holes along both sides of the tooth. It is achieved by a motor arranged on a imaginary line L extending in the radial direction.
- the line L may be parallel to the virtual line L1 connecting the center C of the rotor and the center C1 of the tooth.
- the holes are arranged symmetrically with respect to the line L1, and the distance from the line L1 to the center C2 of the hole in the plane is the same as the distance from the line L1 to the side of the tooth. can do.
- a portion of the adhesive member disposed in the plurality of holes may be disposed between the plurality of sheets. For example, when filling the adhesive member through the hole, the adhesive member may penetrate between the sheets.
- the diameter of each of the plurality of holes may be at least two times and less than three times the thickness of each of the plurality of sheets.
- the diameter of the hole may be at least two times and less than three times the thickness.
- the center C2 of the hole may be disposed on the line L.
- the adhesive member may be of anaerobic properties.
- the viscosity of the adhesive member may be more than 125mPa.s and less than 800mPa.s.
- the plurality of sheets forming at least one unit stator core of the plurality of unit stator cores may be formed by stacking a plurality of first sheets including the plurality of holes and a second sheet without the holes. Can be.
- the second sheet may be disposed on a lower surface of the first sheet disposed on the lowermost layer of the plurality of first sheets, and the second sheet may block holes of the plurality of first sheets.
- the hole may be symmetrically disposed with respect to an imaginary line L1 connecting the center C of the rotor and the center C1 of the tooth.
- the hole when viewed in a radial direction, the hole may be disposed to overlap the side of the tooth.
- 12 teeth may be provided and 10 magnets of the rotor may be provided.
- the motor according to the embodiment may form a stator core by laminating sheets, and fill a hole formed in the stator core with a bonding member to implement a robust design that can reduce noise and vibration.
- the motor can reduce noise and vibration by filling an adhesive member in a hole formed in the stator core.
- the rigidity design can be realized by coating and stacking adhesive members on a sheet, but the cost and time increase in the process.
- the motor according to the embodiment penetrates the adhesive member between the sheets through holes formed in the stator core. Production costs can also be reduced while further reducing noise and vibration.
- the noise and vibration of the motor can be further reduced according to the viscosity of the adhesive member.
- FIG. 1 is a view showing a motor according to an embodiment
- FIG. 2 is a view showing a rotor and a stator of the motor according to the embodiment
- FIG. 3 is a view showing the arrangement of the rotor and the stator core of the motor according to the embodiment
- FIG. 4 is a perspective view illustrating a stator core of the motor according to the embodiment.
- 6A is a graph showing the cogging torque of a comparative example
- 6B is a graph showing cogging torque when the diameter of the hole formed in the stator core of the motor according to the embodiment is ⁇ 1.0
- 6C is a graph showing cogging torque when the diameter of the hole formed in the stator core of the motor according to the embodiment is ⁇ 1.5
- 6D is a graph showing cogging torque when the diameter of the hole formed in the stator core of the motor according to the embodiment is ⁇ 2.0
- 7A is a graph showing torque according to a diameter change of a hole of a motor according to an embodiment
- 7B is a graph illustrating cogging torque according to a change in diameter of a hole of a motor according to an embodiment
- 7C is a graph illustrating a ripple according to a change in diameter of a hole of a motor according to an embodiment
- 7D is a graph showing the counter electromotive force according to the diameter change of the hole of the motor according to the embodiment.
- FIG. 10 is a perspective view illustrating a unit stator core of a motor according to an embodiment
- FIG. 11 is a plan view illustrating a unit stator core of the motor according to the embodiment.
- FIG. 12 is a perspective view illustrating a sheet of the unit stator core of the motor according to the embodiment.
- FIG. 13 is a view illustrating an adhesive member penetrating into a unit stator core of a motor according to an embodiment
- FIG. 14 is a perspective view illustrating another embodiment of the unit stator core of the motor according to the embodiment.
- 15 is a view showing another embodiment of the stator core of 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
- Figure 2 is a view showing a rotor and a stator of the motor according to the embodiment
- Figure 3 is a view showing the arrangement of the rotor and stator core of the motor according to the embodiment
- the x direction may mean an axial direction
- the y direction may mean a radial direction.
- the axial direction and the radial direction may be perpendicular to each other.
- the stator core illustrated in FIG. 3 may be a view showing a state before the adhesive member is filled in the hole.
- the motor 1 includes a housing 100 having an opening formed at one side thereof, a cover 200 disposed at an upper portion of the housing 100, and a rotor 500 coupled to the shaft 500.
- It may include a sensor unit 700 for detecting the rotation of the.
- the rotor 300 of the motor 1 may include ten magnets 320, and the stator 400 may include twelve teeth 412.
- the stator core 410 of the stator 400 may be formed by stacking a plurality of sheets (S) in the axial direction.
- the adhesive member B may be penetrated between the sheets S by filling the adhesive member B through the hole H formed in the stator core 410. Accordingly, the motor 1 can reduce the noise and vibration through the adhesive member (B) permeated between the sheet (S).
- the motor 1 may be a motor used for EPS.
- the electronic power steering system (EPS) may assist the steering force by the driving force of the motor, thereby ensuring turning stability and providing a quick restoring force, thereby enabling the driver to drive safely.
- 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 changed.
- 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 inner side may mean a direction toward the center C and the outer side may mean a direction opposite to the inner side.
- the rotor 300 may be rotatably disposed on the stator 400.
- the rotor 300 may include a rotor core 310 and a plurality of magnets 320 disposed along the circumferential direction on the outer circumferential surface of the rotor core 310.
- ten 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 300 is a plurality of magnets 320 are disposed on the outer circumferential surface of the rotor core 310 as an example, but is not necessarily limited thereto.
- the rotor 300 may be formed in an interior permanent magnet (IPM) type in which the magnet 320 is disposed inside the rotor core 310.
- IPM interior permanent 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.
- a hole to which the shaft 500 is coupled may be formed in the center C of the rotor core 310.
- the magnet 320 forms a rotating magnetic field with the coil 430 wound around the stator core 410 of the stator 400.
- the magnet 320 may be disposed such that the N pole and the S pole are alternately positioned along the circumferential direction with respect to the shaft 500.
- the rotor 300 rotates due to the electrical interaction between the coil 430 and the magnet 320, and the driving force of the motor 1 is generated by rotating the shaft 500 in association with the rotation of the rotor 300. do.
- the rotor 300 may further include a can (not shown) disposed to cover the rotor core 310 to which the magnet 320 is attached.
- the stator 400 may be disposed inside the housing 100.
- the stator 400 may be coupled to the housing 100 through a hot press method. Accordingly, the stator 400 may be supported by the inner circumferential surface of the housing 100.
- the stator 400 is disposed outside the rotor 300. That is, the rotor 300 may be rotatably 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.
- the insulator 420 may be disposed between the stator core 410 and the coil 430 to insulate the coil 430.
- a coil 430 forming a rotating magnetic field may be wound around the stator core 410.
- the stator core 410 may include a yoke 411 having a hole H, a tooth 412 protruding radially from the yoke 411, and an adhesive member B disposed at the hole H. .
- FIG. 4 is a perspective view showing a stator core of the motor according to the embodiment.
- the stator core 410 may be formed by stacking a plurality of sheets S in a thin steel sheet form. Accordingly, when the adhesive member B is filled through the hole H, the adhesive member B may penetrate between the sheets S to reduce noise and vibration of the motor 1.
- the plurality of sheets S may have a predetermined axial thickness T.
- the thickness T may be 0.5 mm.
- the yoke 411 may be formed in a cylindrical shape.
- the plurality of teeth 412 may be disposed to protrude radially from the inner circumferential surface of the yoke 411.
- the teeth 412 may be spaced apart from each other along the circumferential direction. Accordingly, a slot for winding the coil 430 may be formed between the teeth 412.
- the coil 430 may be wound around the tooth 412.
- an insulator 420 may be disposed between the tooth 412 and the coil 430 to insulate the tooth 412 from the coil 430.
- a plurality of holes H may be disposed in the yoke 411 to be spaced apart from each other along the circumferential direction. At this time, the hole (H) may be formed in the yoke 411 to penetrate in the axial direction, but is not necessarily limited thereto.
- the hole H may be disposed on a virtual line L extending radially along the side surface 413 of the tooth 412. Accordingly, when viewed in a radial direction, the hole H may be disposed to overlap the side surface 413 of the tooth 412.
- two holes H may also be formed corresponding to the side surface 413 of the tooth 412.
- the center C2 of the hole H may be disposed on the line L, but is not necessarily limited thereto.
- the hole H may be disposed in the yoke 411 within a range in which the outer diameter of the hole H does not deviate from the line L.
- the line L may be parallel to the virtual line L1 connecting the center C of the rotor 300 and the center C1 of the tooth 412. Accordingly, the two holes H are symmetrically arranged on the basis of the line L1, and the distance D1 from the line L1 to the center C2 of the hole is determined by the line L1. It may be equal to the distance to the side 413 of the tooth 412.
- the diameter (D) of the hole (H) may be at least two times and less than three times the axial thickness (T) of the sheet (S). Therefore, when the thickness T of the sheet S is 0.5 mm, the diameter D of the hole H can be formed in the range of? 1.0?
- the adhesive member B may penetrate between the sheets S.
- FIG. when the adhesive member B is inserted into the hole H, the adhesive member B may penetrate between the sheets S stacked in the axial direction by capillary action.
- the adhesive member B introduced into the hole H may be an anaerobic bond. Accordingly, the adhesive member B may be cured without a curing process using heat curing or ultraviolet rays. And, the viscosity of the adhesive member (B) may be more than 125mPa.s and less than 800mPa.s.
- the adhesive member B when the viscosity of the adhesive member B is 125 mPa.s, the adhesive member B quickly penetrates quickly between the sheets S, and there is no uncoated section between the sheets S. That is, the adhesive member (B) may be all applied between the sheets (S). However, when the viscosity of the adhesive member (B) is less than 125mPa.s, the adhesive member (B) may be leaked to the outside after applying between the sheets (S).
- the viscosity of the adhesive member B is 800 mPa ⁇ s
- a section in which the adhesive member B penetrates between the sheets S but does not penetrate between the sheets S to the inside of the tooth 412 occurs.
- the viscosity of the adhesive member (B) is 2000mPa.s, it takes a considerable time for the adhesive member (B) to penetrate between the sheets (S), the workability is lowered, the curing proceeds, the adhesive member (B) is a sheet (S) A section that does not penetrate up to about half of the area occurs.
- the adhesive member B of the motor 1 is selected within a range in which the viscosity of the adhesive member B is 125 mPa.s or more and less than 800 mPa.s in consideration of the penetration rate and the capillary phenomenon.
- FIG 5 is a table comparing the electrical performance change according to the diameter of the hole formed in the stator core of the motor according to the embodiment
- Figure 6 is a cogging torque of the cogging torque of the comparative example
- the diameter of the hole formed in the stator core of the motor according to the embodiment 7 is a graph illustrating electrical performance change according to a diameter of a hole formed in a stator core of a motor according to an embodiment.
- FIG. 6A is a graph showing the cogging torque of the comparative example
- FIG. 6B is a graph showing the cogging torque when the diameter of the hole formed in the stator core is ⁇ 1.0
- FIG. 6C is the diameter of the hole formed in the stator core of ⁇ 1.5.
- Figure 6d is a graph showing the cogging torque when the diameter of the hole formed in the stator core is ⁇ 2.0.
- Figure 7a is a graph showing the torque according to the change of the diameter of the hole
- Figure 7b is a graph showing the cogging torque according to the change of the diameter of the hole
- Figure 7c is a graph showing the ripple according to the change of the diameter of the hole
- Figure 7d is a diameter of the hole This graph shows the counter electromotive force according to the change.
- the motor presented as a comparative example is a motor in which no hole is formed in the stator core.
- each motor presented in the experiment is compared to the electrical performance changes for the rotor having 10 magnets and the stator having 12 teeth, the case of the motor (1) is not filled with the adhesive member in the hole to be.
- the torque D decreases slightly in the diameter D of the hole H within the range of ⁇ 1.0 ⁇ D ⁇ 1.5, but exceeds ⁇ 1.5.
- the cogging torque decreases rapidly when the diameter D exceeds 1.5.
- the cogging torque is reduced from 30mNm to 28mNm bar can be confirmed that the cogging torque is slightly reduced when exceeding ⁇ 1.5.
- the ripple increases slightly in the range of the diameter D of the hole H within a range of ⁇ 1.0 ⁇ D ⁇ 1.5, but rapidly increases when the diameter D exceeds 1.5.
- FIG. 8 is a table showing vibration reduction before and after filling when the viscosity of the adhesive member of the motor is 125 mPa.s
- FIG. 9 is a viscosity of 800 mPa.s of the adhesive member of the motor according to the embodiment. Is a table showing vibration reduction before and after filling.
- the stator core 410 may be formed by arranging a plurality of unit stator cores 410a along the circumferential direction.
- the unit stator core 410a including the hole H penetrated in the axial direction may be referred to as a first unit stator core.
- FIG. 10 is a perspective view illustrating a unit stator core of a motor according to an embodiment
- FIG. 11 is a plan view illustrating a unit stator core of a motor according to an embodiment
- FIG. 12 illustrates a sheet of a unit stator core of a motor according to an embodiment
- FIG. 13 is a perspective view illustrating an adhesive member penetrating into a unit stator core of a motor according to an embodiment.
- the unit stator core 410a stacks a sheet Sa including an arc-shaped yoke 411a and a tooth 412a protruding radially from the yoke 411a.
- the adhesive member B may be inserted into the hole H to be formed.
- a hole H may be formed in the arc-shaped yoke 411a.
- the sheet Sa in which the hole H is formed to form the unit stator core 410a may be called a first sheet.
- the adhesive member B can be penetrated between the sheets Sa. have.
- the noise and vibration of the motor 1 can be reduced.
- FIG. 14 is a perspective view illustrating another embodiment of the unit stator core of the motor according to the embodiment.
- the stator core 410 may be formed by arranging a plurality of unit stator cores 410b along the circumferential direction.
- the unit stator core 410b blocks the hole H at the lower side. There is a difference in that it further includes a second sheet Sb. Accordingly, the unit stator core 410b according to another embodiment may be referred to as a second unit stator core.
- a unit stator core 410b may include a plurality of first sheets Sa having holes H formed therein and one second sheet disposed below the first sheet Sa. (Sb) may be included. At this time, the hole H does not exist in the second sheet Sb. Accordingly, the second sheet Sb blocks the holes H of the plurality of first sheets Sa, which are stacked, to prevent the adhesive member B from flowing out to the lower side of the unit stator core 410b. can do.
- 15 is a view showing another embodiment of the stator core of the motor according to the embodiment.
- the stator core 410 described above is formed by arranging the unit stator cores 410a and 410b along the circumferential direction, but is not limited thereto.
- the stator core 410 stacks a sheet Sc including a ring-shaped yoke 411b and a plurality of teeth 412b protruding radially from the yoke 411b. It may be formed.
- the plurality of sheets Sc may have a predetermined axial thickness T.
- the thickness T may be 0.5 mm.
- the adhesive member may be formed along the contact surface between the unit stator cores 410a and 410b according to the viscosity of the adhesive member B. Since B) can penetrate in the axial direction, the noise and vibration of the motor 1 can be further reduced.
- the plurality of unit stator cores 410a and 410b are disposed along the circumferential direction, and the adhesive member B is holed in a state in which the plurality of unit stator cores 410a and 410b are temporarily assembled by a method such as spot welding.
- a method such as spot welding.
- the tooth 412 may be disposed to face the magnet 320 of the rotor 300.
- a coil 430 is wound around each tooth 412.
- the insulator 420 may be formed of a synthetic resin material to insulate the stator core 410 from the coil 430.
- the coil 430 may be wound around the stator core 410 on which the insulator 420 is disposed.
- the coil 430 may form a rotating magnetic field by supplying power.
- the insulator 420 may be coupled to the upper side and the lower side of the stator core 410.
- the insulator 420 may be formed as a single piece to be combined with the stator core 410.
- the insulator 420 may be formed of a plurality of unit insulators so that the insulator 420 is disposed along the circumferential direction.
- the shaft 500 may be rotatably supported inside the housing 100 by a 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 and a plurality of terminals 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 may detect the rotation of the shaft 500 by detecting the current position of the rotor 300 by sensing the magnetic force of the sensing magnet installed to be rotatable interlocked with the rotor 300.
- 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 and the sensing plate may be coupled to have a coaxial axis.
- 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 may be formed to have more poles than the main magnet. As a result, the rotation angle can be further divided and measured, and the motor can be made smoother.
- 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.
- a hole through which the shaft 500 penetrates may be formed in the sensing plate.
- 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 detect a change in the N pole and the S pole of the sensing magnet to generate a sensing signal.
- motor 100: housing, 200: cover, 300: rotor, 310: rotor core, 320: magnet, 400: stator, 410: stator core, 430: coil, 500: shaft, 600: busbar, 700: sensor part
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Abstract
Description
Claims (9)
- 샤프트;상기 샤프트와 결합하는 로터; 및상기 로터의 외측에 배치되는 스테이터를 포함하고,상기 스테이터는 복수 개의 단위 스테이터 코어를 원주 방향으로 배치하여 형성된 스테이터 코어 및 상기 스테이터 코어에 권선되는 코일을 포함하며,복수 개의 시트를 적층하여 형성하는 상기 단위 스테이터 코어는,복수 개의 홀을 포함하는 요크,상기 요크에서 반경 방향으로 돌출된 투스, 및복수 개의 상기 홀의 내에 배치되는 접착부재를 포함하며,복수 개의 상기 홀 각각은 상기 투스의 양측면을 따라 반경 방향으로 연장된 가상의 선(L) 상에 배치되는 모터.
- 제1항에 있어서,상기 선(L)은 상기 로터의 중심(C)과 상기 투스의 중심(C1)을 잇는 가상의 선(L1)과 평행한 모터.
- 제2항에 있어서,상기 선(L1)을 기준으로 복수 개의 상기 홀은 대칭되게 배치되며,평면상 상기 선(L1)에서 상기 홀의 중심(C2)까지의 거리는 상기 선(L1)에서 상기 투스의 측면까지의 거리와 동일한 모터.
- 제1항에 있어서,복수 개의 상기 홀 내에 배치되는 상기 접착부재의 일부는 복수 개의 상기 시트 사이에 배치되는 모터.
- 제1항 내지 제4항 중 어느 하나의 항에 있어서,복수 개의 상기 홀 각각의 지름은 복수 개의 상기 시트 각각의 두께의 2배 이상이고 3배 미만인 모터.
- 제5항에 있어서,복수 개의 상기 시트 각각의 두께는 0.5mm인 모터.
- 제5항에 있어서,상기 접착부재의 점도는 125mPa.s 이상이고 800mPa.s 미만인 모터.
- 제1항에 있어서,복수 개의 상기 단위 스테이터 코어 중 적어도 하나의 단위 스테이터 코어를 형성하는 복수 개의 상기 시트는복수 개의 상기 홀을 포함하는 복수 개의 제1 시트와 상기 홀이 형성되지 않은 제2 시트를 적층하여 형성하는 모터.
- 제8항에 있어서,상기 제2 시트는 복수 개의 상기 제1 시트 중 최하층에 배치된 제1 시트의 하면에 배치되고,상기 제2 시트는 복수 개의 상기 제1 시트의 홀을 차단하는 모터.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/270,771 US11799338B2 (en) | 2018-08-30 | 2019-08-27 | Motor |
| EP19855533.6A EP3846319B1 (en) | 2018-08-30 | 2019-08-27 | Motor |
| JP2021510307A JP7477499B2 (ja) | 2018-08-30 | 2019-08-27 | モータ |
| CN201980057070.1A CN112640257B (zh) | 2018-08-30 | 2019-08-27 | 马达 |
| JP2024067395A JP7728916B2 (ja) | 2018-08-30 | 2024-04-18 | モータ |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020180102692A KR102633273B1 (ko) | 2018-08-30 | 2018-08-30 | 모터 |
| KR10-2018-0102692 | 2018-08-30 |
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| Publication Number | Publication Date |
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| WO2020045937A1 true WO2020045937A1 (ko) | 2020-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2019/010883 Ceased WO2020045937A1 (ko) | 2018-08-30 | 2019-08-27 | 모터 |
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| Country | Link |
|---|---|
| US (1) | US11799338B2 (ko) |
| EP (1) | EP3846319B1 (ko) |
| JP (2) | JP7477499B2 (ko) |
| KR (1) | KR102633273B1 (ko) |
| CN (1) | CN112640257B (ko) |
| WO (1) | WO2020045937A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726106A (zh) * | 2020-05-26 | 2021-11-30 | 日本电产株式会社 | 层叠铁芯的制造方法、层叠铁芯、层叠体和马达 |
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| JP7798537B2 (ja) * | 2021-11-08 | 2026-01-14 | ニデック株式会社 | ステータ、およびモータ |
| KR20260029747A (ko) * | 2024-08-26 | 2026-03-05 | 엘지이노텍 주식회사 | 차량용 모터 |
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2018
- 2018-08-30 KR KR1020180102692A patent/KR102633273B1/ko active Active
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2019
- 2019-08-27 EP EP19855533.6A patent/EP3846319B1/en active Active
- 2019-08-27 CN CN201980057070.1A patent/CN112640257B/zh active Active
- 2019-08-27 WO PCT/KR2019/010883 patent/WO2020045937A1/ko not_active Ceased
- 2019-08-27 US US17/270,771 patent/US11799338B2/en active Active
- 2019-08-27 JP JP2021510307A patent/JP7477499B2/ja active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3846319B1 (en) | 2025-07-02 |
| KR102633273B1 (ko) | 2024-02-05 |
| CN112640257A (zh) | 2021-04-09 |
| EP3846319A1 (en) | 2021-07-07 |
| US11799338B2 (en) | 2023-10-24 |
| JP7728916B2 (ja) | 2025-08-25 |
| CN112640257B (zh) | 2024-03-05 |
| EP3846319A4 (en) | 2021-10-27 |
| KR20200025405A (ko) | 2020-03-10 |
| JP2021535714A (ja) | 2021-12-16 |
| JP2024099651A (ja) | 2024-07-25 |
| US20210336493A1 (en) | 2021-10-28 |
| JP7477499B2 (ja) | 2024-05-01 |
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