WO2015009031A1 - 로터 및 그 제조 방법 - Google Patents
로터 및 그 제조 방법 Download PDFInfo
- Publication number
- WO2015009031A1 WO2015009031A1 PCT/KR2014/006394 KR2014006394W WO2015009031A1 WO 2015009031 A1 WO2015009031 A1 WO 2015009031A1 KR 2014006394 W KR2014006394 W KR 2014006394W WO 2015009031 A1 WO2015009031 A1 WO 2015009031A1
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- WIPO (PCT)
- Prior art keywords
- rotor
- molding part
- magnet
- molding
- rotor core
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
-
- 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
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
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- 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
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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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
- It relates to a rotor manufactured by double injection in order to facilitate magnetization and a manufacturing method thereof.
- a motor is a machine that obtains rotational force from electrical energy and includes a stator and a rotor.
- the rotor is configured to electromagnetically interact with the stator and is rotated by a force acting between the magnetic field and the current flowing in the coil.
- Permanent magnet motors that use permanent magnets to generate magnetic fields include surface mounted permanent magnet motors, interior type permanent magnet motors, and spoke type permanent magnet motors. magnet motor).
- the spoke type permanent magnet motor has high magnetic flux concentration in structure, which can generate high torque and high power, and has the advantage of miniaturizing the motor for the same output.
- Spoke-type permanent magnet motors can be applied to washing machine drive motors, electric vehicle drive motors and small generator drive motors that require high torque and high output characteristics.
- the rotor of the spoke-type permanent magnet motor includes a plurality of permanent magnets disposed radially about a rotation axis, a plurality of rotor cores disposed between the permanent magnets, a plurality of rotor cores, and a molding part supporting the plurality of magnets. Include.
- the plurality of magnets are accommodated in the mold and arranged together with the resin in a state in which they are alternately arranged with the plurality of rotor cores without being magnetized.
- Injection molding. Magnetization of the magnet was made after injection molding. In this case, the magnet may not be magnetized to a desired intensity because there is a distance as much as the thickness of the molding part between the magnetizer and the magnet. The decrease in magnetization efficiency has been a factor in deteriorating motor performance.
- the rotor is manufactured by a double injection in which a plurality of magnets before the magnetization and a rotor core alternately arranged with the plurality of magnets are partially injected, and a two-step injection is performed for the entire rotor after magnetization has been performed.
- a rotor and a method of manufacturing the same which can facilitate magnetization of a magnet.
- One embodiment of the rotor includes a first injection part provided with a first injection molding to support a rotor assembly including a magnet and a rotor core and a rotor assembly before magnetization of the magnet, and a second injection to support the rotor assembly after magnetization of the magnet. It may include a molding part including a second molding part which is molded and provided.
- the first molding part may be provided at a portion of the rotor assembly. Specifically, the first molding part may be provided to expose at least one of the inner end and the outer end of the rotor core, or may be provided on at least one of the upper and lower surfaces of the rotor assembly.
- the first molding part may be provided to connect the entire rotor assembly disposed in an annular shape, or may be provided in each of the plurality of separate rotor assemblies.
- a positioning groove for determining a magnetization position may be formed at one side of the first molding part.
- a filling hole may be formed in the rotor core so that the first molding part is provided, and a filling groove may be formed in at least one of the outer end and the inner end of the rotor core.
- an interference protrusion may be formed on at least one of the outer end and the inner end of the rotor core, and a seating protrusion may be formed on a surface adjacent to the magnet of the rotor core.
- the magnet may be alternately disposed with the rotor core.
- magnetization of the magnet may be made through one of the inner and outer ends of the rotor core, in which case the ratio of the length of the magnet (Hm) to the width (Wc) of the end at which the magnet is magnetized (Hm / Wc) may be 0.5 or more and 5.5 or less.
- magnetization of the magnet may be made through the inner and outer ends of the rotor core, in which case the length of the magnet (Hm) relative to the width WcL of the wider end of the inner and outer ends.
- Ratio (Hm / WcL) may be 0.5 or more and 5.5 or less.
- the driving shaft may further include a serration connected thereto, and the second molding part may be connected by the serration and insert injection molding, banding, or a connecting member.
- according to an embodiment may further include a frame made of a metal material connected to the molding.
- the second molding part may be provided by second injection molding while the rotor assembly is supported by the frame.
- the frame has a cylindrical shape, and an outer circumferential surface of the molding part and an inner circumferential surface of the frame may be connected.
- the frame may have a cylindrical shape in which one surface is open, and the other surface that is not open may be provided to have a plurality of circles having different diameters.
- the second molding part may be provided to support the outer circumferential side of the rotor assembly.
- the second molding part may be formed to extend by a predetermined length to the outer circumferential side of the rotor assembly.
- One embodiment of the manufacturing method of the rotor is to arrange the mark net and the rotor core alternately to provide a rotor assembly, to prepare a first molding portion for supporting the rotor assembly by first injection molding, the magnetizer is a magnetic flux Supplying to magnetize the magnet and providing a second molding portion for supporting the rotor assembly and the first molding portion by second injection molding.
- the magnet can be easily magnetized before the second stage injection after the first stage injection by allowing the rotor to be manufactured by double injection.
- FIG. 1 is a view illustrating a washing machine according to an embodiment.
- FIG. 2 is an exploded perspective view of the tub and the motor according to the first embodiment.
- FIG 3 is an exploded perspective view of the motor according to the first embodiment.
- FIGS. 4A and 4B are perspective views of the rotor according to the first embodiment.
- FIG 5 is a view showing the inside of the rotor according to the first embodiment.
- FIG. 6 is an exploded perspective view of the tub and the motor according to the second embodiment.
- FIG. 7 is an exploded perspective view of the motor according to the second embodiment.
- FIGS. 8A and 8B are perspective views of the rotor according to the second embodiment.
- FIG. 9 is a perspective view of the rotor assembly and the molding part according to the second embodiment.
- FIG. 10A illustrates a rotor assembly according to an embodiment.
- 10B illustrates a rotor assembly according to another embodiment.
- FIG. 11 is a view illustrating a magnetic field formed when starting a motor without a mounting protrusion according to an exemplary embodiment.
- FIG. 12 is a perspective view of a rotor core including a seating protrusion according to another embodiment.
- FIG. 13 is a view illustrating a magnetic field formed at startup of a motor including a seating protrusion according to another exemplary embodiment.
- FIG. 14 illustrates a concept of determining a width of a rotor core and a length of a magnet, according to an exemplary embodiment.
- 15A-15P are cross-sectional views of examples of rotor core shapes.
- FIG. 16 illustrates a rotor including a first injection molded molding part and a rotor assembly according to an exemplary embodiment.
- FIG. 17 illustrates a magnetizer for magnetizing a magnet and a rotor before a second injection, according to an exemplary embodiment.
- FIG. 18 illustrates a rotor including a second injection molded molding and a rotor assembly, according to an exemplary embodiment.
- FIG. 19 illustrates a rotor including a second injection molded molding, the rotor assembly, and a serration according to another embodiment.
- FIG. 20 illustrates a rotor including a second injection molded molding, a rotor assembly, a serration, and a frame according to another embodiment.
- 21A is a perspective view of a molding part in which a second molding part and a serration are connected by insert injection, according to an exemplary embodiment.
- 21B is a perspective view of a molding part in which a second molding part and a serration are connected by a connection member, according to another exemplary embodiment.
- 22A is a perspective view of a rotor including a frame provided on an outer circumferential surface of a molding part, according to an exemplary embodiment.
- 22B is an enlarged cross-sectional view of a rotor including a frame provided on an outer circumferential surface of a molding part, according to an exemplary embodiment.
- Fig. 23 is a diagram showing the concept of a rotor according to the third embodiment.
- FIG. 24 is a view showing a cross section of the rotor according to the third embodiment.
- 25 is a flow chart for a method of manufacturing a rotor according to one embodiment.
- the rotor described below may be applied to all kinds of devices that use a motor as a power source such as a washing machine, an air conditioner, an electric vehicle, a light rail, an electric bicycle, and a small generator, but the following description will be given by using a washing machine as an example.
- rotors there are two types of rotors, an outer type rotor in which the rotor is located outside the stator, and an inner type rotor in which the stator is located outside the rotor.
- the rotor described below may be applied to both the outer type rotor and the inner type rotor, but will be mainly described below with respect to the outer type rotor.
- FIG. 1 is a view illustrating a washing machine according to an embodiment.
- the washing machine 1 includes a cabinet 10 forming an exterior, a tub 20 disposed inside the cabinet 10, and a drum rotatably disposed inside the tub 20. 30 and a motor 40 for rotationally driving the drum 30.
- An inlet 11 is formed in the front portion of the cabinet 10 to inject laundry into the drum 30.
- the inlet 11 is opened and closed by a door 12 provided in the front part of the cabinet 10.
- the upper portion of the tub 20 is provided with a water supply pipe 50 for supplying the wash water to the tub (20).
- a water supply pipe 50 for supplying the wash water to the tub (20).
- One side of the water supply pipe 50 is connected to an external water supply source, and the other side of the water supply pipe 50 is connected to the detergent supply device 60.
- Detergent supply device 60 is connected to the tub 20 through a connecting pipe (55). Water supplied through the water supply pipe 50 is supplied into the tub 20 together with the detergent via the detergent supply device 60.
- a drain pump 70 and a drain pipe 75 for discharging water in the tub 20 to the outside of the cabinet 10 are installed below the tub 20.
- a plurality of through-holes 31 are formed around the drum 30 for distribution of the wash water, and a plurality of lifters are formed on the inner circumferential surface of the drum 30 so that the laundry can be raised and dropped when the drum 30 rotates. 32 is installed.
- the drum 30 and the motor 40 are connected through the drive shaft 80. That is, the motor 40 may be provided with a direct drive (DD) motor.
- the drive shaft 80 transmits the rotational force of the motor 40 to the drum 30.
- One end of the drive shaft 80 is connected to the drum 30, and the other end of the drive shaft 80 extends to the outside of the rear wall 21 of the tub 20.
- the rear wall 21 of the tub 20 is provided with a bearing housing 82 to rotatably support the drive shaft 80.
- the bearing housing 82 may be made of an aluminum alloy, and may be inserted into the rear wall 21 of the tub 20 when the tub 20 is injection molded.
- Bearings 84 are installed between the bearing housing 82 and the drive shaft 80 so that the drive shaft 80 can rotate smoothly.
- the motor 40a is connected to the rear wall 21 of the tub 20 together with the sensor assembly 150.
- the rear wall 21 of the tub 20 is provided with a bearing 84 at the center thereof, and a bearing housing 82 having a large diameter and the same center point as the bearing 84 on the outer circumferential side of the provided bearing 84. ) May be provided.
- the outer peripheral side of the bearing housing 82 may be provided with a circular motor seating portion having the same center point as the bearing housing 82 and having a diameter larger than that of the bearing housing 82.
- the connection protrusion 161 may be provided along the outer circumference of the motor seating portion.
- At least one connecting protrusion 161 may be provided on an outer circumference of the motor seating part, and the connecting protrusion 161 may protrude toward the motor 40a on the outer circumference of the motor seating part.
- the connection protrusion 161 may protrude to be perpendicular to the rear wall 21 of the tub 20.
- the connecting protrusion 161 may be provided symmetrically or asymmetrically along an extension line of the diameter passing through the center of the motor seating portion.
- at least one other connecting protrusion 161 may be provided near the one connecting protrusion 161. That is, the arrangement of the connection protrusion 161 may be arranged to correspond to the arrangement of the connection hole 162 of the stator 100.
- the connecting protrusion 161 may be provided such that two connecting protrusions 161 and one connecting protrusion 161 are alternated in the circumferential direction.
- connection protrusion 161 may have a shape of a pillar, and the cross section may have various shapes corresponding to the connection hole 162 of the stator 100.
- the connection protrusion 161 may have a cylindrical shape to correspond to the circular connection hole 162.
- connection method various methods for connecting the sensor assembly 150 and the motor 40a to the rear wall 21 of the tub 20 may be used as an example of the connection method.
- the sensor assembly 150 is provided near the motor 40a to detect rotational displacement of the motor 40a.
- the sensor assembly 150 may be provided at one side of the stator 100 to detect a rotation speed, torque, rotation angle, frequency, and the like of the rotor 200a. As shown in FIG. 2, the sensor assembly 150 may be provided between the tub 20 and the stator 100, and the tub 20 and the stator may be opposite to the rear wall 21 of the tub 20. 100) and the sensor assembly 150 may be provided in the order. In addition, the sensor assembly 150 may correspond to the connection protrusion 161 of the motor seating portion, and may have a groove similar to the connection hole 162 of the stator 100.
- the width of the grooved side may be less than or equal to the width of the outer circumferential side, or the rotor provided on the inner circumferential side of the stator 100. In order to detect the rotational displacement of the 200a, the width of the grooved side may be less than or equal to the width of the inner circumferential side.
- one sensor assembly 150 may be provided, but two or three or more sensor assemblies 150 may be provided. The number of sensor assemblies 150 provided may be determined in consideration of the structure and unit cost of the manufactured rotor 200a and an error range of rotational displacement to be sensed.
- the sensor assembly 150 may include a rotational speed sensor to detect a rotational displacement of the motor 40a.
- the sensor assembly 150 may include a hall sensor.
- the Hall sensor uses an N-type semiconductor, and can express the magnetic field as a voltage through the Hall Effect. Therefore, the hall sensor may output an angle, a frequency, a driving time, etc. related to the rotational displacement of the rotor 200a by detecting a change in the magnetic field due to the rotation of the rotor 200a.
- a means for detecting the rotational displacement of the rotor 200a not only a hall sensor, but also an angle sensor such as a resolver, a potentiometer, an absolute encoder, an incremental encoder, etc. May be used.
- the resolver is a type of rotary transformer connected to the axis of the motor 40a to output an alternating current voltage in proportion to the position of the rotor 200a
- a potentiometer is an angle sensor. Accordingly, it is an angle sensor that calculates an electrical input that is directly proportional to the rotating angle by varying the value of the variable resistor.
- Absolute Encoder is an angle sensor that detects how much rotation is in the corresponding position using an optical pulse wave without setting a reference position, and Incremental Encoder sets a reference position. By calculating the angle through the increase and decrease of the measured angle, it is an angle sensor that detects how much rotation in the corresponding position using the optical pulse wave.
- the rotational speed sensor calculates the rotational speed of the motor 40a based on the rotational angle, the frequency and the driving time of the rotor 200a detected by the rotational speed sensor, and provides the configuration to control the motor 40a. It may be.
- the sensor assembly 150 may detect the mechanical movement of the rotor 200a to calculate the rotational speed of the rotor 200a, but may also detect the electrical change to calculate the rotational speed of the rotor 200a. Specifically, the sensor assembly 150 may calculate the rotational speed of the rotor 200a by detecting a change in driving power supplied to the coil 120 or a counter electromotive force caused by the rotation of the rotor 200a.
- the motor 40a may be connected to a motor seating part provided on the rear wall 21 of the tub 20, and the motor 40a may include a stator 100 and a rotor 200a.
- the motor 40a may include a stator 100 and a rotor 200a.
- the stator 100 may include a stator core 130, a coil 120, and a connection hole 162.
- the stator core 130 forms a skeleton of the stator 100 to maintain the shape of the stator 100, and when one tooth is magnetized by the power source, another tooth adjacent to one tooth is different from the polarity that is magnetized by the power source. It can provide a passage through which a magnetic field is formed to be induced magnetized.
- stator core 130 may be formed to have a cylindrical shape, and may be formed by stacking a pressed iron plate.
- a plurality of teeth may be positioned in the circumferential direction on the outer circumferential side of the stator core 130, and a plurality of connection holes 162 may be provided on the inner circumferential side of the stator core 130.
- various shapes for maintaining the shape of the stator 100 and allowing the tooth and the connection hole 162 to be provided may be used as an example of the shape of the stator core 130.
- a plurality of teeth may be disposed on the outer circumference of the stator core 130 to divide the space between the stator 100 and the rotor 200a outside the stator core 130 into a plurality of slots along the circumferential direction.
- the number of teeth in the stator core 130 may be 24 or more and 48 or less.
- the teeth may provide a space in which the coil 120 is to be located, and may be magnetized to one of the N pole and the S pole by a magnetic field formed by the power supplied to the coil 120.
- the tooth may have a shape of Y, and a surface adjacent to the rotor 200a among the outer surfaces of the teeth may have a curved surface in order to efficiently generate attractive force and repulsive force with the rotor core 220 in the rotor 200a.
- various structures for providing a space in which the coil 120 is to be located and for efficiently generating attractive force and repulsive force with the rotor core 220 may be used as an example of the tooth.
- the coil 120 may be provided in an insulator located on the teeth of the stator core 130 to form a magnetic field due to the applied power. For this reason, the coil 120 may magnetize the tooth in which the coil 120 is located.
- the power supplied to the coil 120 may be in the form of three phases, or may be in the form of a single phase.
- the coil 120 may be wound in a concentrated winding method and a distributed winding method.
- the coil 120 is wound around the stator 100 such that the number of slots on one pole is one
- the distribution winding method is a method in which the coil 120 is divided into two or more slots in a slotted electric device. to be.
- various methods for efficiently magnetizing the tooth may be used as an example of a method of winding the coil 120.
- the material used for the coil 120 may be copper, aluminum or a composite material of copper and aluminum.
- various materials for efficiently magnetizing the tooth may be used as an example of the material of the coil 120.
- connection hole 162 is provided on the inner circumferential surface of the stator core 130 to provide a space into which the connection protrusion 161 of the motor seating portion provided on the rear wall 21 of the tub 20 is inserted.
- connection hole 162 may be inserted into the connection protrusion 161 and fixed by the connection member.
- a bolt 262b which is less than or equal to the diameter of the connection hole 162 is inserted to maintain the stator 100 and the tub 20 in a coupled state. Can provide a clamping force.
- connection hole 162 may be provided to correspond to the shape of the connection protrusion 161 provided on the rear wall 21 of the tub (20).
- the connection hole 162 may be provided as a circular hole so as to correspond to the connection protrusion 161 having a cylindrical shape.
- the rotor 200a rotates by interacting with a magnetic field formed with the magnet 240 and the rotor core 220 provided along the inner circumferential surface and a magnetic field formed by supplying power to the coil 120 of the stator 100.
- Fig. 4A shows the external appearance of the rotor on the side where the stator is not located
- Fig. 4B shows the external appearance of the rotor on the side where the stator is located
- 5 shows the inside of the rotor.
- the rotor 200a may include an annular rotor assembly 210 and a molding part 260a for supporting the rotor assembly 210.
- the rotor assembly 210 forms a magnetic field by the magnet 240, and the magnetic field formed by the power supplied to the coil 120, the attraction force and the repulsive force act.
- the rotor assembly 210 has an annular shape.
- the rotor assembly 210 may include a rotor core 220 disposed radially and a magnet 240 disposed between the rotor core 220.
- the rotor core 220 and the magnet 240 are alternately arranged, and the alternately arranged rotor assembly 210 may be arranged to be curved, or may be arranged to have an annular shape.
- the molding part 260a supports the rotor assembly 210 and transmits the rotational force generated by the rotor assembly 210 to the drive shaft.
- the molding part 260a is formed to surround the rotor assembly 210 outside the rotor assembly 210 to prevent scattering of the rotor assembly 210 including the rotor core 220 and the magnet 240 therein. prevent.
- the thickness of the molding part may be determined by the centrifugal force applied to the rotor assembly, the output of the motor and the rigidity of the molding part material.
- the thickness of the molding part may be 1 [mm] or more and 5 [mm] or less.
- the molding part 260a may be provided with a circular partition wall coupled with a cylindrical partition wall and a lower surface of the cylindrical partition wall along the annular rotor assembly 210.
- the molding part 260a may have a cylindrical shape having one surface open as shown in FIGS. 4A and 4B.
- a portion of the rotor core 220 may be exposed on a surface of the cylindrical partition wall close to the stator 100 so as to easily interact with a magnetic field formed in the stator core 130. That is, a portion of the rotor core 220 of the inner circumferential surface of the molding part 260a may be exposed to the outside of the outer type rotor 200a, and the rotor 200a of the inner type of the rotor 200a may be exposed to the outer circumferential surface of the molding part 260a. A portion of the core 220 may be exposed to the outside.
- the rotor core 220 and the magnet 240 are formed on the surface of the cylindrical partition not adjacent to the stator 100 so that the magnetic flux generated by the magnet 240 does not leak in a direction opposite to the stator 100. It may not be exposed to the outside. That is, the outer type rotor 200a may not expose the rotor core 220 and the magnet 240 on the outer circumferential surface of the molding part 260a, and the inner type rotor 200a may have the molding part 260a. The rotor core 220 and the magnet 240 of the inner peripheral surface of the may not be exposed to the outside.
- the surface of the cylindrical partition that is not close to the stator 100 may be formed by extending the molding portion 260a by a predetermined length to the outer peripheral side in order to prevent the rotor assembly 210 from scattering.
- the molding part 260a may be extended to the outer circumferential side by a length of 2 [mm] or more and 3 [mm] or less.
- the molding part 260a may include a first molding part 266 supporting the rotor assembly 210 before magnetization of the magnet 240 and a second molding part supporting the rotor assembly 210 after magnetization to prevent scattering. 268 and a serration 262a for transmitting the rotational force generated by the rotor 200a to the drive shaft.
- the material of the molding unit 260a may be a nonmagnetic material.
- the molding part 260a may use a resin so that magnetic flux does not leak to a side opposite to the side adjacent to the rotor 200a.
- the molding part 260a may use an epoxy resin, urethane resin, polybutyrene terephthalate resin (PBT), and polyethylene terephthalate (PET).
- the material of the first molding part 266 and the material of the second molding part 268 may be the same or different.
- various materials for preventing leakage of magnetic flux may be used as an example of the material of the molding part 260a.
- first molding part 266, the second molding part 268, and the serration 262a will be described with reference to FIGS. 16 to 21B below.
- the molding part 260b supports the rotor assembly 210 and transmits the rotational force generated by the rotor assembly 210 to the drive shaft.
- the molding part 260b is formed to surround the rotor assembly 210 outside the rotor assembly 210 to prevent scattering of the rotor assembly 210 including the rotor core 220 and the magnet 240 therein. prevent.
- the thickness of the molding part may be determined by the centrifugal force applied to the rotor assembly, the output of the motor and the rigidity of the molding part material.
- the thickness of the molding part may be 1 [mm] or more and 5 [mm] or less.
- the molding part 260b may be provided with a cylindrical partition wall along the annular rotor assembly 210.
- the molding part 260b may have a cylindrical shape in which upper and lower surfaces are open.
- a portion of the rotor core 220 may be exposed on a surface of the cylindrical partition wall close to the stator 100 so as to easily interact with a magnetic field formed in the stator core 130. That is, a part of the rotor core 220 of the inner circumferential surface of the molding part 260b may be exposed to the outside of the outer type rotor 200b, and the rotor 200b of the inner type of the rotor 200b may be a rotor of the outer circumferential surface of the molding part 260b. A portion of the core 220 may be exposed to the outside.
- the rotor core 220 and the magnet 240 are formed on the surface of the cylindrical partition not adjacent to the stator 100 so that the magnetic flux generated by the magnet 240 does not leak in a direction opposite to the stator 100. It may not be exposed to the outside. That is, the outer type rotor 200b may not expose the rotor core 220 and the magnet 240 on the outer circumferential surface of the molding part 260b, and the inner type rotor 200b may have the molding part 260b. The rotor core 220 and the magnet 240 of the inner peripheral surface of the may not be exposed to the outside.
- the surface of the cylindrical partition that is not close to the stator 100 may be formed by extending the molding portion 260b by a predetermined length to the outer peripheral side in order to prevent the rotor assembly 210 from scattering.
- the molding part 260b may be extended to the outer circumferential side by a length of 2 [mm] or more and 3 [mm] or less.
- the cylindrical molding part 260b may be connected to and supported by the frame 269.
- the frame 269 may have a cylindrical shape having one surface open, and may include a metal material having high rigidity.
- the material of the frame 269 may be a metal having high rigidity to support the rotor assembly 210 and the molding part 260b to prevent scattering.
- a metal having high rigidity to support the rotor assembly 210 and the molding part 260b to prevent scattering.
- steel or aluminum (Al) may be used for the frame 269.
- various materials having high rigidity may be used as an example of the material of the frame 269.
- the frame 269 may include a cylindrical partition wall 269a and a circular partition wall that are coupled to a lower surface of the cylindrical partition wall on a surface side adjacent to the outer circumferential surface of the second molding part 268.
- the frame 269 may have a cylindrical shape having one surface open as illustrated in FIGS. 7 to 8B.
- the bottom surface of the circular partition wall 269a of the frame 269 may be provided to form a circular shape having a same center and having a different diameter as shown in FIG. 8A.
- the centrifugal force acts in the outer circumferential direction so that deformation of the frame 269 may occur.
- the centrifugal force may be reduced by reducing the diameter of the lower surface of the frame 269. have. Therefore, a plurality of bending shapes may be provided on the bottom surface of the frame 269, and now the partition walls 269b provided below the diameter of the cylindrical partition wall 269a may be smaller. That is, as shown in FIG. 8A, the diameter of the frame 269 may be reduced toward the side where the serration 262b is located.
- connection between the frame 269 and the second molding part 268 may be connected by pressing or may be connected through bonding through the connecting member.
- the connecting member may be a bolt 262b and a nut 262c or an adhesive.
- various methods for connecting the frame 269 and the second molding part 268 may be used.
- connection between the frame 269 and the serration 262b may be connected by press-fitting, squeezed through bonding through a connecting member, or may be connected through insert injection.
- the connecting member may be a bolt 262b and a nut 262c or an adhesive.
- various methods for connecting the frame 269 and the serration 262b may be used.
- the molding part 260b may include a first molding part 266 supporting the rotor assembly 210 before magnetization of the magnet 240 and a second molding part supporting the rotor assembly 210 after magnetization to prevent scattering. 268, a serration for transmitting the rotational force generated by the frame 269 and the rotor 200b to the driving shaft by connecting the first molding part and the second molding part 268 to support the second molding part 268. 262b).
- the material of the molding unit 260b may be a nonmagnetic material.
- the molding part 260b may use a resin such that magnetic flux does not leak to a side opposite to the side adjacent to the rotor 200b.
- the molding part 260b may use an epoxy resin, a urethane resin, a polybutyrene terephthalate resin (PBT), and a polyethylene terephthalate (PET).
- the material of the first molding part 266 and the material of the second molding part 268 may be the same or different.
- various materials for preventing leakage of magnetic flux may be used as an example of the material of the molding part 260b.
- first molding part 266, the second molding part 268, and the serration 262b will be described with reference to FIGS. 16 to 21B below.
- the motor 40b is connected to the rear wall 21 of the tub 20 together with the sensor assembly 150.
- the tub 20 and the sensor assembly 150 of the second embodiment may be the same as or different from the tub 20 and the sensor assembly 150 of the first embodiment.
- the motor 40b is connected to a motor seating part provided on the rear wall 21 of the tub 20, and the motor 40b may include a stator 100 and a rotor 200b.
- the motor 40b may include a stator 100 and a rotor 200b.
- the stator 100 may include a stator core 130, a coil 120, and a connection hole 162.
- the stator core 130 forms a skeleton of the stator 100 to maintain the shape of the stator 100, and when one tooth is magnetized by the power source, another tooth adjacent to one tooth is different from the polarity that is magnetized by the power source. It can provide a passage through which a magnetic field is formed to be induced magnetized.
- stator core 130 may be formed to have a cylindrical shape, and may be formed by stacking a pressed iron plate.
- a plurality of teeth may be positioned in the circumferential direction on the outer circumferential side of the stator core 130, and a plurality of connection holes 162 may be provided on the inner circumferential side of the stator core 130.
- various shapes for maintaining the shape of the stator 100 and allowing the tooth and the connection hole 162 to be provided may be used as an example of the shape of the stator core 130.
- a plurality of teeth may be disposed on the outer circumference of the stator core 130 to divide the space between the stator 100 and the rotor 200b outside the stator core 130 into a plurality of slots along the circumferential direction.
- the number of teeth in the stator core 130 may be 24 or more and 48 or less.
- the teeth may provide a space in which the coil 120 is to be located, and may be magnetized to one of the N pole and the S pole by a magnetic field formed by the power supplied to the coil 120.
- the teeth may have a shape of Y, and a surface adjacent to the rotor 200b among the outer surfaces of the teeth may have a curved surface for efficient attraction and repulsion with the rotor core 220 in the rotor 200b. have.
- various structures for providing a space in which the coil 120 is to be located and for efficiently generating attractive force and repulsive force with the rotor core 220 may be used as an example of the tooth.
- the coil 120 may be provided in an insulator located on the teeth of the stator core 130 to form a magnetic field due to the applied power. For this reason, the coil 120 may magnetize the tooth in which the coil 120 is located.
- the power supplied to the coil 120 may be in the form of three phases, or may be in the form of a single phase.
- the coil 120 may be wound in a concentrated winding method and a distributed winding method.
- the coil 120 is wound around the stator 100 such that the number of slots on one pole is one
- the distribution winding method is a method in which the coil 120 is divided into two or more slots in a slotted electric device. to be.
- various methods for efficiently magnetizing the tooth may be used as an example of a method of winding the coil 120.
- the material used for the coil 120 may be copper, aluminum or a composite material of copper and aluminum.
- various materials for efficiently magnetizing the tooth may be used as an example of the material of the coil 120.
- connection hole 162 is provided on the inner circumferential surface of the stator core 130 to provide a space into which the connection protrusion 161 of the motor seating portion provided on the rear wall 21 of the tub 20 is inserted.
- connection hole 162 may be inserted into the connection protrusion 161 and fixed by the connection member.
- a bolt 262b which is less than or equal to the diameter of the connection hole 162 is inserted to maintain the stator 100 and the tub 20 in a coupled state. Can provide a clamping force.
- connection hole 162 may be provided to correspond to the shape of the connection protrusion 161 provided on the rear wall 21 of the tub (20).
- the connection hole 162 may be provided as a circular hole so as to correspond to the connection protrusion 161 having a cylindrical shape.
- the rotor 200b rotates by interacting with a magnetic field formed along the inner circumferential surface and a magnetic field formed with the rotor core 220 and a magnetic field formed by supplying power to the coil 120 of the stator 100.
- Fig. 8A shows the appearance of the rotor on the side where the stator is not located
- Fig. 8B shows the appearance of the rotor on the side where the stator is located
- 9 illustrates the appearance of the rotor assembly and the molding part.
- the rotor 200b is an annular rotor assembly 210a, a molding part 260b for supporting the rotor assembly 210a, and a frame 269 for supporting the rotor assembly 210a and the molding part 260b and transmitting driving force to the drive shaft. ) May be included.
- the rotor assembly 210a forms a magnetic field by the magnet 240, and the magnetic field formed by the power supplied to the coil 120, the attraction force, and the repulsive force act.
- the rotor assembly 210a has an annular shape.
- the rotor assembly 210a may include a rotor core 220 disposed radially and a magnet 240 disposed between the rotor core 220.
- the rotor core 220 and the magnet 240 are alternately arranged, and the alternately arranged rotor assembly 210a may be arranged to draw a curve or may have an annular shape.
- FIG. 10A illustrates a rotor assembly according to an embodiment.
- the plurality of rotor cores 220 support the magnets 240 and form a magnetic path formed in the magnets 240.
- the plurality of rotor cores 220 may be arranged in a circumferential shape so as to correspond to the outer shape of the stator 100.
- the magnets 240 may be spaced apart from each other so that the magnets 240 may be accommodated between the respective rotor cores 220.
- the number of the rotor cores 220 disposed may be determined by the number of teeth of the stator core 130, the coercive force of the magnet 240, the required output, and the like.
- the number of rotor cores 220 disposed is 24 or more, and may be 56 or less.
- various variables may be used as variables for determining the number of rotor cores 220.
- the thickness of the rotor core 220 disposed may be determined by the number of teeth of the stator core 130, the coercive force of the magnet 240, and the required output.
- the thickness of the rotor core 220 disposed may be 5 [mm] or less.
- various variables may be used as variables for determining the thickness of the rotor core 220.
- the rotor core 220 includes an inner end 220b disposed adjacent to the center of the rotor 200 and an outer end 220a disposed adjacent to the stator core 130.
- the rotor core 220 may be formed by stacking a plate formed by pressing a silicon steel sheet.
- the rotor core 220 may include a filling hole 221 or a filling groove 222.
- the filling hole 221 may be formed adjacent to the inner end portion 220b of the rotor core 220, and the filling groove 222 may be formed at the outer end portion 220a of the rotor core 220.
- the filling hole 221 or the filling groove 222 may be filled with the injection material during the injection molding of the molding part 260. By injection molding the injection material into the filling hole 221 or the filling groove 222, the fastening strength between the rotor core 220 and the molding part 260 may be reinforced.
- the filling hole 221 may be formed in a cross section of a circle, ellipse, polygon or wedge, and when the cross section of the filling hole 221 is circular, the diameter of the circle may be 0.5 [mm] or more and 5 [mm] or less. .
- the diameter of the filling groove 222 may be formed larger toward the inner side of the rotor core 220 from the outer end portion 220a side.
- the first fastening protrusion 223a and the second fastening protrusion 223b may be formed at the inner end portion 220b of the rotor core 220.
- the first fastening protrusion 223a and the second fastening protrusion 223b may protrude from the left and right sides of the inner end portion 220b of the rotor core 220 in the inner circumferential direction of the rotor 200, respectively.
- the first fastening protrusion 223a may contact the magnet 240 located on the left side of the rotor core 220 so that the rotor core 220 may be supported in the center direction of the rotor 200.
- the second fastening protrusion 223b may be supported in the center direction of the rotor 200 in contact with the magnet 240 located at the right side of the rotor core 220.
- the plurality of magnets 240 disposed between the respective rotor cores 220 are arranged along the circumferential direction of the rotor 200 to be radially positioned with respect to the center of the rotor 200.
- the magnet 240 may be a ferrite magnet capable of semi-permanently maintaining a high energy density magnetic property or a magnet including rare earth such as neodymium or samarium.
- the magnets 240 are disposed so that two magnets 240 adjacent to each other face the same polarity. According to such a magnetic circuit, the magnetic flux generated from the magnet 240 is concentrated, thereby improving performance while reducing the size of the motor 40.
- 10B illustrates a rotor assembly according to another embodiment.
- one side of the rotor core 220 may include a filling hole 221 and an interference protrusion 225.
- the filling hole 221 may be formed adjacent to the inner end portion 220b of the rotor core 220, and the interference protrusion 225 may be formed at the outer end portion 220a of the rotor core 220.
- the filling hole 221 may be filled with an injection material during injection molding of the molding part 260.
- the filling hole 221 may be the same as or different from the filling hole 221 described with reference to FIG. 10A.
- the interference protrusion 225 may protrude from the outer end portion 220a of the rotor core 220 in the radial direction of the rotor 200.
- the diameter of the cross section of the interference protrusion 225 may be larger as the distance from the outer end portion 220a of the rotor core 220.
- the injection hole is filled into the injection hole 221 to be injection molded, and the molding part 260 is interfered by the interference protrusion 225 to strengthen the fastening strength between the rotor core 220 and the molding part 260.
- the first fastening protrusion 223a and the second fastening protrusion 223b may be formed at the inner end portion 220b of the rotor core 220.
- the first fastening protrusion 223a and the second fastening protrusion 223b may protrude from the left and right sides of the inner end portion 220b of the rotor core 220 in the circumferential direction of the rotor 200, respectively.
- the first fastening protrusion 223a may contact the magnet 240 located on the left side of the rotor core 220 to support the rotor core 220 toward the center of the rotor 200.
- the second fastening protrusion 223b may be supported in the center direction of the rotor 200 in contact with the magnet 240 located at the right side of the rotor core 220.
- FIG. 11 illustrates a magnetic field formed at the start of the motor 40 without the mounting protrusion 226.
- the starting power supplied to the coil 120 at the initial start-up due to the load inside the drum, the washing water inside the tub 20, and other reasons is two to three times higher than the driving power.
- the supply current flows to the coil 120 so that a current of two to three times the driving current flows. Therefore, the magnetic field RF formed by the starting power supplied to the coil 120 of the stator 100 is two to three times the magnetic field formed by the driving power.
- the center portion excluding the corners P1 and P2 of the magnet 240 is less affected by the molding portion 260 of the nonmagnetic material provided in the vicinity, but the reverse magnetic flux is introduced into the rotor core 220.
- Both edges P1 and P2 of the magnet 240 are in contact with the potato, which loses its properties as a magnetic material of the magnet 240 due to the influence of the strong reverse magnetic field RF. Therefore, the magnetic field formed by the magnet 240 is weakened and the attractive force and repulsive force interacting with the magnetic field formed by the power supplied to the coil 120 is reduced, which leads to a decrease in the output of the motor 40.
- the distance between the magnet 240 and the stator 100 may be maintained at a constant distance. Specifically, the distance between the magnet 240 and the stator 100 may be maintained at a predetermined distance or more by using a thickness of the first fastening protrusion 223a and the second fastening protrusion 223b to be equal to or more than a predetermined thickness.
- the mounting protrusion 226 to be described later may be provided in the rotor core 220 to maintain the distance between the magnet 240 and the stator 100 to a predetermined distance or more.
- the seating protrusion 226 is a structure for preventing the potato of the magnet 240 generated due to the strong reverse magnetic field (RF) when the motor 40 is started.
- the seating protrusion 226 is a magnet of the rotor core 220. 240 is provided on both sides in contact with.
- the seating protrusion 226 is provided at a predetermined distance from the inner end portion 220b or the outer end portion 220a such that the magnet 240 is spaced apart from the stator 100 by a predetermined distance or more, and the magnet is rotated at a high speed of the rotor 200. The scattering of 240 can be prevented.
- the mounting protrusion 226 may be provided at the outer end portion 220a of the rotor core 220 as shown in FIG. 12, or may be provided at the inner end portion 220b of the rotor core 220.
- the seating protrusion 226 has a distance from the inner end portion 220b or the outer end portion 220a of the rotor core 220 to an end portion near the seating protrusion 226 is 0.5 [mm] or more, and 5 [mm] or less. It may be provided to be.
- the seating protrusion 226 may be provided with a single seating protrusion 226 of a straight shape on one surface, a plurality of seating protrusions 226 may be provided.
- the seating protrusion 226 is provided on both sides of the rotor core 220, the potato at the corner of the magnet 240 generated by the starting power is reduced, and the magnet by the centrifugal force during the high speed rotation of the rotor 200 ( The scattering of 240 can be reduced.
- the injection material is filled between the fastening protrusion 223 and the seating protrusion 226 during injection molding, so that the fastening strength between the rotor assembly 210 and the molding part 260 may be reinforced.
- FIG. 13 illustrates a magnetic field formed at startup of a motor including a seating protrusion.
- the mounting protrusions 226 are provided at both sides of the rotor core 220 to maintain the distance between the magnet 240 and the stator 100 or more, a starting power is supplied and generated.
- the effect of the reverse magnetic field RF acting on the edges P1 and P2 of the magnet 240 can be reduced, thereby reducing the potato of the magnet 240. Therefore, by reducing the potato generated in the magnet 240 does not reduce the magnetic field formed by the magnet 240, and interacts with the magnetic field formed by supplying power, the output of the motor 40 is the starting power source It may not be lowered by the supply of.
- the flux concentration motor has a variable magnetization performance due to a structural singularity that concentrates the magnetic flux of the magnet 240 on the rotor core 220.
- the general PM motor may be magnetized regardless of the shape of the rotor 200 in the magnetizer M.
- the magnetizing flux flows into the rotor core 220, and the magnetizing flux must flow out to the other rotor core 220 in the vicinity, so that the shape ratio between the rotor core 220 and the magnet 240 may vary.
- the magnetization performance is only guaranteed if it has a certain ratio.
- the ratio of the shape between the rotor core 220 and the magnet 240 is a ratio of the length Hm of the circumferential side width Wc of the rotor core 220 from the inner circumference to the outer circumference of the magnet 240 ( Hm / Wc).
- the magnetization of the magnet 240 is performed on only one side of the rotor 200 or the magnet 240 is attached. Whether the self rotor 200 is performed on both the inner circumferential side and the outer circumferential side may be an important variable.
- Whether magnetization of the magnet 240 is performed on one side may be determined by the capacity of the magnet 240 provided in the rotor assembly 210, and the capacity of the magnet 240 is the length, width and material of the magnet 240. And so on.
- the ratio Hm / Wc of the length Hm of the magnet 240 to the end width Wc of the rotor core 220 on the side where the magnetization is performed is It becomes aspect ratio.
- the shape ratio reflecting the end width of the rotor core 220 on the side where magnetization is performed should satisfy the range of the specific ratio.
- the specific ratio range may be a case where the shape ratio required for concentrating the magnetic flux in the rotor core 220 in the flux concentration motor and the shape ratio that secures the magnetization performance when the magnetic flux is introduced through the magnetizer M may be satisfied. have.
- the range of this specific ratio may be determined by the material of the rotor core 220, the angle between the magnets 240, the material of the magnets 240, and the size of the magnetic flux.
- various variables may be used as variables for determining a range of specific ratios.
- the condition to be satisfied in order to secure magnetization performance has a shape ratio of 5.5 or less (Hm / Wc ⁇ 5.5).
- the condition to be satisfied in order to concentrate the magnetic flux on the rotor core 220 should be a shape ratio of 0.5 or more (0.5 ⁇ Hm / Wc). Therefore, in order to satisfy both, the shape ratio between the rotor core 220 and the magnet 240 should be 0.5 or more and 5.5 or less (0.5 ⁇ Hm / Wc ⁇ 5.5).
- the magnet for the width WcL of the wide end of the inner end 220b or the outer end 220a of the rotor core 220 on the side where the magnetization is performed The ratio Hm / WcL of the length Hm of 240 becomes the aspect ratio.
- the aspect ratio reflecting the width of the large end portion should satisfy the range of the specific ratio.
- the specific ratio range may be a case where the shape ratio required for concentrating the magnetic flux in the rotor core 220 in the flux concentration motor and the shape ratio that secures the magnetization performance when the magnetic flux is introduced through the magnetizer M may be satisfied. have.
- the range of this specific ratio may be determined by the material of the rotor core 220, the angle between the magnets 240, the material of the magnets 240, and the size of the magnetic flux.
- various variables may be used as variables for determining a range of specific ratios.
- the condition to be satisfied in order to secure magnetization performance (e.g., magnetization uniformity of 0.8 or more and 1.0 or less) is required for the aspect ratio of 5.5 or less (Hm / WcL ⁇ 5.5).
- the condition to be satisfied in order to concentrate the magnetic flux in the rotor core 220 in the flux concentration motor has to have a shape ratio of 0.5 or more (0.5 ⁇ Hm / WcL). Therefore, in order to satisfy both, the shape ratio between the rotor core 220 and the magnet 240 should be 0.5 or more and 5.5 or less (0.5 ⁇ Hm / WcL ⁇ 5.5).
- 15A to 15P show a cross section of the rotor core shape.
- the groove is not provided at the outer end portion 220a, and the first fastening protrusion 223a and the second fastening protrusion 223b are provided.
- the filling groove 222 having a trapezoidal cross section is provided at the inner end portion 220b of the rotor core 220.
- the filling hole 221 is not provided at the center of the rotor core 220_1.
- the mounting protrusions 226 are not provided at both side surfaces of the rotor core 220_1.
- the rotor core 220_2 illustrated in FIG. 15B is not provided with a groove at the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a trapezoidal cross section is provided at the inner end portion 220b of the rotor core 220.
- a circular filling hole 221 is provided at the center of the inner end portion 220b and the outer end portion 220a at the center of the rotor core 220_2.
- the mounting protrusions 226 are not provided at both side surfaces of the rotor core 220_2.
- a groove is not provided at the outer end portion 220a, the first fastening protrusion 223a, and the second fastening protrusion 223b, and the mounting protrusion 226 is provided.
- the filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220_3.
- the filling hole 221 is not provided at the center of the rotor core 220_3.
- the rotor core 220_4 illustrated in FIG. 15D is not provided with a groove at the outer end portion 220a, and has a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220_4.
- the center of the rotor core 220_4 is provided with a circular filling hole 221 at a position biased to the outer end portion 220a.
- the mounting protrusions 226 are not provided at both side surfaces of the rotor core 220_4.
- the rotor core 220-5 illustrated in FIG. 15E has no groove at the outer end portion 220a, and is provided with a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a trapezoidal cross section is provided at the inner end portion 220b of the rotor core 220-5.
- the filling hole 221 is not provided at the center of the rotor core 220-5.
- the mounting protrusion 226 is provided on the outer end portion 220a side of both side surfaces of the rotor core 220-5.
- a groove is not provided at the outer end portion 220a, and the first fastening protrusion 223a and the second fastening protrusion 223b are provided.
- a filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-6.
- the filling hole 221 is not provided at the center of the rotor core 220-6.
- the mounting protrusions 226 are not provided at both side surfaces of the rotor core 220-6.
- the rotor core 220_7 shown in FIG. 15G is provided with a groove in the center of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- a filling groove 222 having an elliptical cross section is provided at the inner end portion 220b of the rotor core 220_7.
- a circular filling hole 221 is provided at the center of the rotor core 220_7.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220_7.
- a groove is not provided at the outer end portion 220a, and the first fastening protrusion 223a and the second fastening protrusion 223b are provided.
- the filling groove 222 is not provided at the inner end portion 220b of the rotor core 220-8.
- the center of the rotor core (220_8) is provided with a circular filling hole 221 at a position biased to the outer end (220a).
- the mounting protrusion 226 is provided at the inner end portion 220b of both side surfaces of the rotor core 220-8.
- the groove is not provided at the outer end portion 220a, and the first fastening protrusion 223a and the second fastening protrusion 223b are provided.
- a filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-9.
- the filling hole 221 is not provided at the center of the rotor core 220-9.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-9.
- the rotor core 220-10 illustrated in FIG. 15J has grooves at both sides of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-10.
- the filling hole 221 is not provided at the center of the rotor core 220-10.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-10.
- the rotor core 220-11 illustrated in FIG. 15K includes grooves at both sides and the center of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-11.
- the filling hole 221 is not provided at the center of the rotor core 220-11.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-11.
- the rotor core 220-12 illustrated in FIG. 15L is provided with a groove in the center of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-12.
- the filling hole 221 is not provided at the center of the rotor core 220-12.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-12.
- the rotor core 220-13 illustrated in FIG. 15M has grooves at both sides of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- a filling groove 222 having an elliptical cross section is provided at the inner end portion 220b of the rotor core 220-13.
- a circular filling hole 221 is provided at the center of the rotor core 220-13.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-13.
- a groove is not provided at the outer end portion 220a, and the first fastening protrusion 223a and the second fastening protrusion 223b are provided.
- a filling groove 222 having a circular cross section is provided at the inner end portion 220b of the rotor core 220-14.
- the filling hole 221 is not provided at the center of the rotor core 220-14.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-14.
- the rotor core 220-15 illustrated in FIG. 15O has grooves at both sides of the outer end portion 220a, and includes a first fastening protrusion 223a and a second fastening protrusion 223b.
- the filling groove 222 of the inner end portion 220b of the rotor core 220-15 is not provided.
- the filling hole 221 is not provided at the center of the rotor core 220-15.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-15.
- a groove is provided at the center of the outer end portion 220a, and a first fastening protrusion 223a and a second fastening protrusion 223b are provided.
- the filling groove 222 of the inner end portion 220b of the rotor core 220-16 is not provided.
- the filling hole 221 is not provided at the center of the rotor core 220-16.
- the mounting protrusion 226 is provided at the outer end portion 220a of both side surfaces of the rotor core 220-16.
- FIG. 16 shows a rotor including a first injection molded molding and a rotor assembly.
- the rotor core 220 and the magnet 240 before magnetization may be alternately disposed.
- the magnet 240 In the state in which the magnet 240 is magnetized, the rotor core 220 in the manufacturing process by interaction between the magnets 240 by the magnetic field of the magnets 240 or interaction between the magnets 240 and the rotor cores 220. And magnets 240 are difficult to alternately place. Accordingly, the magnet 240 may be alternately disposed with the rotor core 220 without being magnetized.
- the first injection molding may be performed to partially include the first molding part 266 in the rotor assembly 210 in which the magnet 240 and the rotor core 220 which are not magnetized are alternately arranged.
- the first molding part 266 may be provided at upper and lower surfaces of the rotor assembly 210.
- the first molding part 266 may be provided to cover the remaining portions except for the inner side or the outer side of the rotor core 220 of the rotor assembly 210. That is, although the first molding part 266 may be provided on the inner side and the outer side of the rotor assembly 210 where the magnet 240 is located, the inner side or the outer side of the rotor assembly 210 where the rotor core 220 is located.
- the first molding part 266 may not be positioned at the side surface.
- the rotor assembly 210 in which the plurality of magnets 240 and the rotor core 220 are alternately disposed is accommodated in a mold, and an injection material which may be a first molding part 266 in the mold in which the rotor assembly 210 is accommodated. Can be injected. As described above, the first injection molding may be partially performed on the rotor assembly 210 while the rotor assembly 210 is inserted.
- the injection material may be inserted into the filling hole 221 provided in the rotor core 220 to be injection molded.
- the injection material injected through one side of the mold may move to the other side through the filling hole 221.
- the injection material injected through the upper surface side of the rotor assembly 210 in the mold may move to the lower surface side of the rotor assembly 210 through the filling hole 221.
- the first molding part 266 provided at the upper and lower parts of the rotor assembly 210 is connected to each other so that the first molding part 266 and the rotor assembly ( 210 may be provided integrally.
- the plurality of rotor cores 220 and the plurality of magnets 240 of the rotor assembly 210 may be fixed by the first molding part 266.
- the thickness of the first molding part 266 may be greater than or equal to 1 [mm] and less than or equal to 5 [mm].
- the thickness of the first molding part 266 provided on the upper surface of the rotor assembly 210 and the thickness of the first molding part 266 provided on the lower surface of the rotor assembly 210 are each 1 mm or more, It may be formed to 5 [mm] or less.
- a positioning groove 264 may be formed in the first molding part 266.
- a protrusion provided in the magnetizer M is inserted to determine the position of the rotor assembly 210 in the magnetizer M.
- Positioning groove 264 may facilitate positioning of the rotor assembly 210 in the magnetizer (M).
- the positioning groove 264 can also be used in the second injection molding. The rotor assembly 210 may be easily positioned in the mold by the positioning groove 264 during the second injection molding.
- the rotor assembly 210 in which the first injection molding is completed may maintain an annular shape and may be provided in two or more C shapes.
- the first molding part 266 may be provided in the entire rotor assembly 210 arranged in an annular shape so that the annular rotor assembly 210 and the first molding part 266 may be integrally formed, and the first molding part may be formed.
- the portion 266 may be integrally molded with a portion of the rotor assembly 210.
- the magnetizer (M) when the large magnetizer (M) that can magnetize the entire rotor assembly 210 at once is provided with the annular rotor assembly 210 and the first molding portion 266 integrally
- the size of the magnetizer M is small to partially magnetize the rotor assembly 210, a part of the rotor assembly 210 and the first molding part 266 may be integrally molded.
- magnetization of the magnet 240 may be performed several times, thereby reducing the size of the magnetizer M, and the primary It can be easily implemented at a low investment cost in that the size of the mold for injection molding can be reduced.
- the magnetized portion of the rotor assembly 210 may be magnetized, the risk of non-compounds may be reduced.
- Fig. 17 shows the magnetizer M for magnetizing the magnet and the rotor before the second injection.
- the magnetizer M includes an outer magnetizer M1 positioned outside the rotor assembly 210 and an inner magnetizer M2 positioned inside the rotor assembly 210. Since the inner and outer surfaces of the rotor assembly 210 are not covered by the first molding part and are exposed, the magnet 240 may be easily magnetized by the magnetizer M to have a predetermined magnetic field strength. . Even though the magnet 240 is covered by the first molding part 266, the magnet 240 may be magnetized through the rotor core 220.
- the second injection molding may be performed.
- the rotor assembly 210 may be received in a mold, and injection material may be injected into the mold to be injection molded together with the rotor assembly 210.
- FIG. 18 illustrates a rotor including a second injection molded molding and rotor assembly according to one embodiment.
- the outer surface of the rotor assembly 210 integrally formed with the first molding part 266 may be injection molded to be wrapped by the second molding part 268.
- the plurality of rotor assemblies 210 may be injection molded to form one annular shape.
- the rotor assembly 210 formed integrally with the first molding part 266 and the second molding part 268 may be inserted together with the serration 262 to be injection molded.
- the rotor assembly 210 and the serration 262 may be inserted together and injection molded so that the rotor assembly 210 and the serration 262 may be integrally provided by the molding part 260.
- the rotor 200 may be provided.
- metal frame 269 connected to the serration 262 and the rotor assembly 210 may be press-fitted or bent.
- FIG. 19 illustrates a rotor including a second injection molded molding, a rotor assembly, and a serration according to another embodiment.
- the second molding part 268 may be connected to the serration 262 by the second injection molding.
- the rotor assembly 210 and the serration 262 in which magnetization is completed may be accommodated in a mold and injection material may be injected into the mold to be injection molded.
- the rotor 200 having the rotor assembly 210 and the serration 262 may be provided in the molding unit 260.
- the rotor assembly 210 is injected together with the serration 262 by forming a plurality of rotor assemblies 210 into one annular shape. Can be molded.
- the molding part 260 is formed to extend further by a predetermined length to the outside of the rotor assembly 210. Can be.
- the rotor assembly 210 exerts centrifugal force in the radial direction of the rotor 200 by centrifugal force.
- the molding part 260 located on the outer side of the rotor assembly 210 is continuously subjected to force.
- the rotor assembly 210 is scattered in the radial direction of the rotor 200.
- the thickness of the molding part 260 positioned outside the rotor assembly 210 may be increased to prevent the rotor assembly 210 from being scattered as described above.
- the thickness may be 2 [mm] or more and 3 [mm] or less.
- FIG. 20 illustrates a rotor including a second injection molded molding, a rotor assembly, a serration, and a frame, according to another embodiment.
- the rotor assembly 210 in which magnetization is completed may be second injection molded while being supported by a metal frame 269.
- the frame 269 may be provided to support the outer surface of the rotor assembly 210.
- the frame 269 may connect the serration 262 and the rotor assembly 210.
- the serration 262, the rotor assembly 210 and the frame 269 may be inserted into the mold to be integrally injection molded.
- the outer side of the rotor assembly 210 is supported by the frame 269, so that the rotor assembly 210 may be prevented from scattering even when there is a weak portion of the molding part 260.
- the rotor 200 is manufactured by dual injection molding including a first injection molding and a second injection molding, such that the plurality of magnets 240 and the plurality of rotor cores 220 are alternately disposed.
- first injection molding is made to partially cover the 210
- magnetization is made
- second injection molding is performed to cover the entire rotor assembly 210. To make it happen.
- FIG. 21A illustrates an appearance of a molding part in which a second molding part and a serration are connected by insert injection, according to an exemplary embodiment.
- the serration 262 transmits the rotational force generated in the rotor 200 to the drive shaft.
- the serration 262 is provided with a hole having a tooth in the center of the circular shape is connected to the drive shaft, so that there is no slip to transfer the rotational force to the drive shaft.
- a plurality of coupling holes 262a are provided around the central hole.
- the serration 262 may include a metal material having high rigidity.
- a metal material having high rigidity For example, steel or aluminum (Al) may be used for the frame 269.
- various materials having high rigidity may be used as an example of the material of the frame 269.
- the serration 262 and the second molding part 268 are combined by insert injection.
- the second molding part 268 inserts the serration 262 into the mold, and then fills the injection material into the mold so that the injection material penetrates into the coupling hole 262a, so that the second molding part 268 is formed. Can be generated. Accordingly, the second molding part 268 and the serration 262 may be connected while the second molding part 268 of the upper and lower coupling holes 262a covers the serration 262.
- FIG. 21B illustrates an appearance of a molding part in which a second molding part and a serration are connected by a connection member, according to another exemplary embodiment.
- the serration 262 is provided with a toothed hole at the center thereof, and a plurality of coupling holes 262a are provided around the serration 262.
- the serration 262 of FIG. 21B may be the same as or different from the serration 262 of FIG. 21A.
- the second molding part 268 is connected to the bottom surface by pressing or bending the frame 269.
- the molding part 260 to which the second molding part 268 and the frame 269 are connected is provided with a hole corresponding to the coupling hole 262a of the serration 262 inside the connection part of the serration 262.
- the serration 262 and the molding part 260 may be disposed to match the coupling holes 262a of the serration 262 and the holes provided in the molding part 260, and may be connected through a connection member.
- connection member may be an adhesive or a nut 262c for connecting the bolt 262b and the bolt 262b that pass through the hole, as shown in FIG. 21B.
- connection members connecting the serration 262 and the molding part 260 may be used as an example of the connection member.
- FIG. 22A illustrates an external appearance of a rotor including a frame provided on the outer circumferential surface of the molding part
- FIG. 22B illustrates a cross section of the rotor including the frame provided on the outer circumferential surface of the molding part and an enlarged cross section thereof.
- the rotor 200 includes a serration 262 that transmits rotational force to the drive shaft, a molding unit 260 that prevents leakage and scattering of magnetic flux of the rotor assembly 210, and scattering of the rotor assembly 210 and the molding unit 260. It may include a frame 269 to prevent.
- the serration 262 and the rotor 200 may be the same as or different from the serration 262 and the rotor 200 according to the first embodiment of FIGS. 2 to 5.
- the frame 269 may have a cylindrical shape with open top and bottom surfaces, and may include a metal material having high rigidity.
- the material of the frame 269 may be a metal having high rigidity to support the rotor assembly 210 and the molding part 260 to prevent scattering.
- a metal having high rigidity to support the rotor assembly 210 and the molding part 260 to prevent scattering.
- steel or aluminum (Al) may be used for the frame 269.
- various materials having high rigidity may be used as an example of the material of the frame 269.
- the frame 269 may be provided with a cylindrical partition wall on a surface adjacent to the outer peripheral surface of the molding part 260.
- the frame 269 may have a cylindrical shape in which both sides are open, as shown in FIGS. 22A and 22B.
- connection between the frame 269 and the molding part 260 may be connected by press-fitting, or may be connected by bonding through the connection member.
- the connecting member may be a bolt 262b and a nut 262c or an adhesive.
- various methods for connecting the frame 269 and the molding unit 260 may be used.
- FIG. 23 shows the concept of the rotor
- FIG. 24 shows the cross section of the rotor.
- the rotor 200c may include an annular rotor assembly 210 and a molding part 260c supporting the rotor assembly 210.
- the rotor assembly 210 forms a magnetic field by the magnet 240, and the magnetic field formed by the power supplied to the coil 120, the attraction force and the repulsive force act.
- the rotor assembly 210 has an annular shape.
- the rotor assembly 210 may include a rotor core 220 disposed radially and a magnet 240 disposed between the rotor core 220.
- the rotor core 220 and the magnet 240 of the third embodiment may be the same except for the directions of the rotor core 220 and the magnet 240 and the rotor core 220 of the first embodiment.
- the rotor 200c of the first embodiment is an outer type rotor, but the rotor 200c of the third embodiment is an inner type rotor. Therefore, the fastening protrusion 223 of the rotor 200c of the third embodiment may be disposed toward the outer circumferential surface, and the filling groove 222 and the interference protrusion 225 may be disposed toward the inner circumferential surface.
- the molding part 260c supports the rotor assembly 210 and transmits the rotational force generated by the rotor assembly 210 to the drive shaft.
- the molding part 260c is formed to surround the rotor assembly 210 outside the rotor assembly 210 to prevent the rotor assembly 210 including the rotor core 220 and the magnet 240 from scattering. prevent.
- the molding part 260c may be provided with a circular partition wall coupled with a cylindrical partition wall and a lower surface of the cylindrical partition wall along the annular rotor assembly 210.
- the molding part 260c may have a cylindrical shape having one surface open as illustrated in FIGS. 23 and 24.
- a portion of the rotor core 220 may be exposed on a surface of the cylindrical partition wall close to the stator 100 so as to easily interact with a magnetic field formed in the stator core 130. That is, a part of the rotor core 220 of the inner circumferential surface of the molding part 260c may be exposed to the outside of the outer type rotor 200c, and the rotor 200c of the inner type of the rotor 200c may be a rotor of the outer circumferential surface of the molding part 260c. A portion of the core 220 may be exposed to the outside.
- the rotor core 220 and the magnet 240 are formed on the surface of the cylindrical partition not adjacent to the stator 100 so that the magnetic flux generated by the magnet 240 does not leak in a direction opposite to the stator 100. It may not be exposed to the outside. That is, the outer type rotor 200c may not expose the rotor core 220 and the magnet 240 on the outer circumferential surface of the molding part 260c, and the inner type rotor 200c may have the molding part 260c. The rotor core 220 and the magnet 240 of the inner peripheral surface of the may not be exposed to the outside.
- the molding part 260c may have a height higher than the outer circumferential side of the molding part 260c as shown in FIG. 24 to improve magnetization performance when magnetization is performed on the inner circumferential surface. That is, the inner circumferential side height may be higher than the height of the rotor assembly 210 to provide a space in which the magnetizer M is to be located when magnetized on the inner circumferential surface.
- the molding part 260c may include a first molding part 266c supporting the rotor assembly 210 before magnetization of the magnet 240 and a second molding part supporting the rotor assembly 210 after magnetization to prevent scattering. 268c and a serration 262c for transmitting the rotational force generated by the rotor 200c to the drive shaft.
- a material of the molding unit 260c may be a nonmagnetic material.
- the molding part 260c may use a resin so that magnetic flux does not leak to a side opposite to the side adjacent to the rotor 200c.
- the molding part 260c may use an epoxy resin, a urethane resin, a polybutyrene terephthalate resin (PBT), and a polyethylene terephthalate (PET).
- the material of the first molding part 266c and the material of the second molding part 268c may be the same or different.
- various materials for preventing leakage of magnetic flux may be used as an example of the material of the molding part 260c.
- 25 is a flowchart for a method of manufacturing a rotor.
- the rotor core and the magnet before magnetization may be alternately disposed (S1).
- the rotor assembly is alternately arranged between the rotor core and the magnet before magnetization.
- the shape has an annular shape in the case of first injection molding of one rotor assembly, and has a curved shape in the case of first injection molding of a plurality of rotor assemblies.
- the rotor core may be arranged to have a filling hole, may be arranged to have an interference protrusion, or may be arranged to have a filling hole and an interference protrusion.
- first injection molding may be performed to partially include the first molding part (S2).
- the first assembly when magnetizing is performed only on one side according to the capacity of the provided magnet, the first assembly is inserted to insert the rotor assembly so that only one side is opened, thereby performing first injection molding to prepare the first molding part.
- the rotor assembly when magnetization is performed on both sides of the installed magnet, the rotor assembly may be inserted into the first molding part so that both sides of the first molding part are opened to perform first injection molding to provide the first molding part.
- the rotor assembly when the rotor assembly performs magnetization in a state where the outside is entirely covered by the first molding part, the rotor assembly is inserted to perform first injection molding so that the outer front surface of the rotor assembly is not opened to provide the first molding part.
- the injection material of the upper and lower surfaces of the rotor core flows into the filling hole of the rotor core so that the first molding of the upper and lower surfaces is performed.
- the additional connection can increase the mechanical stiffness.
- the rotor assembly provided integrally with the first molding part may be located in the magnetizer to perform magnetization of the magnet (S3).
- the magnetization flux may flow into an externally exposed portion of one rotor core, and the magnetization flux may flow out to an externally exposed portion of the other rotor core.
- the magnet located between one rotor core and the other rotor core can be magnetized with polarity according to the direction of the magnetizing magnetic flux.
- second injection molding may be performed (S4).
- the second molding part may be integrally formed by inserting the serration and the insert, or may be provided with a hole corresponding to the coupling hole of the serration and connected to the connection member.
- one side may be provided to have a shape of an open cylinder.
- the second molding part may be second injection molded to be connected to the frame through press-in or banding.
- the second molding part may be manufactured by dividing the plurality of second molding parts to constitute one rotor, or may be manufactured integrally so that one second molding part constitutes one rotor.
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- Engineering & Computer Science (AREA)
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims (31)
- 마그네트와 로터 코어를 포함하는 로터 어셈블리; 및상기 마그네트의 착자 전의 상기 로터 어셈블리를 지지하도록 제 1 사출 성형되어 구비되는 제 1 몰딩부와, 상기 마그네트의 착자 후의 상기 로터 어셈블리를 지지하도록 제 2 사출 성형되어 구비되는 제 2 몰딩부를 포함하는 몰딩부;를 포함하는 로터.
- 제1항에 있어서,상기 제 1 몰딩부는 상기 로터 어셈블리의 일부분에 구비되는 로터.
- 제1항에 있어서,상기 로터 코어의 내측 단부 및 외측 단부 중 적어도 하나는 상기 제 1 몰딩부의 외부로 노출되는 로터.
- 제1항에 있어서,상기 제 1 몰딩부는 상기 로터 어셈블리의 상부면 및 하부면 중 적어도 하나에 구비되는 로터.
- 제1항에 있어서,상기 제 1 몰딩부는 환형으로 배치된 상기 로터 어셈블리 전체를 연결하도록 구비되는 로터.
- 제1항에 있어서,상기 제 1 몰딩부는 복수 개로 분리된 상기 로터 어셈블리 각각에 구비되는 로터.
- 제1항에 있어서,상기 제 1 몰딩부의 일 측면에는 위치결정홈이 형성되는 로터.
- 제1항에 있어서,상기 로터 코어에는 상기 제 1 몰딩부가 구비되도록 충진홀이 형성되는 로터.
- 제1항에 있어서,상기 로터 코어의 외측 단부 및 내측 단부 중 적어도 하나에는 충진홈이 형성되는 로터.
- 제1항에 있어서,상기 로터 코어의 외측 단부 및 내측 단부 중 적어도 하나에는 간섭돌기가 형성되는 로터.
- 제1항에 있어서,상기 로터 코어의 상기 마그네트에 인접한 면에는 안착돌기가 형성되는 로터.
- 제11항에 있어서,상기 안착돌기는 상기 로터 코어의 외측 단부 및 내측 단부 중 적어도 하나와의 거리가 0.5mm이상이고, 5mm이하인 위치에 구비되는 로터.
- 제1항에 있어서,상기 마그네트와 상기 로터 코어는 교번하여 배치되는 로터.
- 제1항에 있어서,상기 마그네트의 착자는 상기 로터 코어의 내측 단부 및 외측 단부 중 하나를 통해 이루어지는 로터.
- 제14항에 있어서,상기 마그네트의 착자가 이루어지는 단부의 폭(Wc)에 대한 상기 마그네트의 길이(Hm)의 비(Hm/Wc)는 0.5이상이고, 5.5이하인 로터.
- 제1항에 있어서,상기 마그네트의 착자는 상기 로터 코어의 내측 단부 및 외측 단부를 통해 이루어지는 로터.
- 제16항에 있어서,상기 내측 단부와 상기 외측 단부 중 폭이 큰 단부의 폭(WcL)에 대한 상기 마그네트의 길이(Hm)의 비(Hm/WcL)는 0.5이상이고, 5.5이하인 로터.
- 제1항에 있어서,상기 몰딩부는 구동축이 연결되는 세레이션을 더 포함하고,상기 제 2 몰딩부는 상기 세레이션이 인서트되어 제 2 사출 성형되어 구비되는 로터.
- 제1항에 있어서,상기 몰딩부는 구동축이 연결되는 세레이션을 더 포함하고,상기 제 2 몰딩부는 연결 부재에 의해 상기 세레이션과 연결되는 로터.
- 제1항에 있어서,상기 몰딩부와 연결되는 금속 재질의 프레임;을 더 포함하는 로터.
- 제20항에 있어서,상기 제 2 몰딩부는 상기 로터 어셈블리가 상기 프레임에 지지된 상태로 제 2 사출 성형되어 구비되는 로터.
- 제20항에 있어서,상기 프레임은 원통의 형상을 갖고,상기 몰딩부의 외주면과 상기 프레임의 내주면이 연결되는 로터.
- 제20항에 있어서,상기 프레임은 일 면이 개방된 원기둥의 형상을 갖고,개방되지 않은 타면은 상이한 지름의 복수 개의 원을 갖도록 구비되는 로터.
- 제1항에 있어서,상기 제 2 몰딩부는 상기 로터 어셈블리의 외주측을 지지하도록 구비되는 로터.
- 제24항에 있어서,상기 제 2 몰딩부는 상기 로터 어셈블리의 외주측으로 미리 설정된 길이만큼 연장되도록 형성되어 상기 로터 어셈블리의 비산을 방지하는 로터.
- 마크네트와 로터 코어가 교번되도록 배치시켜 로터 어셈블리를 마련하는 단계;제 1 사출 성형으로 상기 로터 어셈블리를 지지하는 제 1 몰딩부를 마련하는 단계;착자기가 착자 자속을 공급하여 상기 마그네트를 착자시키는 단계; 및제 2 사출 성형으로 상기 로터 어셈블리 및 상기 제 1 몰딩부를 지지하는 제 2 몰딩부를 마련하는 단계;를 포함하는 로터의 제조 방법.
- 제26항에 있어서,상기 제 1 몰딩부의 마련은 상기 로터 어셈블리의 상부면 및 하부면 중 적어도 하나를 커버하도록 마련되는 로터의 제조 방법.
- 제26항에 있어서,상기 마그네트의 착자는 내측 착자기 및 외측 착자기 중 적어도 하나를 이용하여 상기 마그네트를 착자시키는 로터의 제조 방법.
- 제26항에 있어서,상기 제 2 몰딩부의 마련은 구동축이 연결되는 세레이션이 인서트되어 제 2 사출 성형되는 로터의 제조 방법.
- 제26항에 있어서,상기 제 2 몰딩부와 세레이션을 연결 부재를 이용해 연결하는 단계;를 더 포함하는 로터의 제조 방법.
- 제26항에 있어서,상기 제 2 몰딩부의 마련은 상기 로터 어셈블리가 금속 재질의 프레임에 지지된 상태로 제 2 사출 성형되는 로터의 제조 방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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CN201480045474.6A CN105474514B (zh) | 2013-07-16 | 2014-07-15 | 转子及其制造方法 |
US14/905,767 US10734855B2 (en) | 2013-07-16 | 2014-07-15 | Rotor and method of manufacturing same |
Applications Claiming Priority (4)
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KR10-2013-0083450 | 2013-07-16 | ||
KR20130083450 | 2013-07-16 | ||
KR1020140088546A KR102150310B1 (ko) | 2013-07-16 | 2014-07-14 | 로터 및 그 제조 방법 |
KR10-2014-0088546 | 2014-07-14 |
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PCT/KR2014/006394 WO2015009031A1 (ko) | 2013-07-16 | 2014-07-15 | 로터 및 그 제조 방법 |
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US11264851B2 (en) | 2018-11-26 | 2022-03-01 | Lg Electronics Inc. | Motor having alternately arranged rotor core segments and permanent magnets |
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