WO2022264712A1 - ステータユニット、モールドモータ及びステータユニットの製造方法 - Google Patents
ステータユニット、モールドモータ及びステータユニットの製造方法 Download PDFInfo
- Publication number
- WO2022264712A1 WO2022264712A1 PCT/JP2022/019798 JP2022019798W WO2022264712A1 WO 2022264712 A1 WO2022264712 A1 WO 2022264712A1 JP 2022019798 W JP2022019798 W JP 2022019798W WO 2022264712 A1 WO2022264712 A1 WO 2022264712A1
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- WIPO (PCT)
- Prior art keywords
- stator core
- stator
- rotor
- unit according
- resin
- Prior art date
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Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/08—Insulating casings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/03—Machines characterised by thrust bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Definitions
- the present disclosure relates to a stator unit of a motor, a molded motor including the stator unit, and a method of manufacturing the stator unit.
- a molded motor having a structure in which the stator is covered with molded resin.
- a molded motor includes a stator having a stator core and coils wound around the stator core, a rotor facing the stator, and molded resin covering the stator.
- the stator and mold resin constitute a stator unit.
- the stator unit has a structure in which a stator core and coils are covered with a mold resin.
- Patent Document 1 discloses an inner rotor type molded motor.
- a rotor is arranged inside a stator unit.
- the inner peripheral surface of the stator core in the stator unit becomes the rotor facing surface facing the rotor.
- a stator core wound with a coil is supported by pins and placed in a mold, and liquid resin is injected into the mold and hardened to mold the mold resin into a predetermined shape.
- the stator core is supported by bringing the pins into contact with the rotor facing surface of the stator core. Therefore, the mold resin is not formed on the rotor facing surface of the stator core. Therefore, in the conventional stator unit, the rotor-facing surface of the stator core is exposed. Therefore, for example, when the stator core is used in a high-humidity environment, the stator core may rust. In particular, when a molded motor is used in a refrigerator in a humid environment, such as when the door is opened and closed, the rotor-facing surface, which is a metal surface, is exposed, the exposed metal may cause the rotor-facing surface to leak. The stator core is prone to rust.
- the rust formed on the rotor-facing surface may adversely affect the rotational motion of the rotor. For example, since the air gap between the rotor and the stator core is very small, rust formed on the rotor facing surface may contact the rotor and prevent the rotor from rotating at a predetermined speed. Ultimately, the air gap between the rotor and stator core may be clogged with rust, resulting in locking of the rotor and stator.
- the stator core is coated with an antirust coating.
- stator core is coated with an anti-corrosion coating, there is a risk that the coating may become uneven or may come off due to mechanical contact.
- An object of the present disclosure is to provide a stator unit, a molded motor, and a method of manufacturing a stator unit that can suppress rusting of the rotor-facing surface of the stator core without anticorrosive coating.
- one aspect of the stator unit according to the present disclosure includes a stator core facing a rotor included in a molded motor, a coil wound around the stator core, a mold resin covering the stator core and the coil, wherein the stator core has a rotor facing surface facing the rotor, and the mold resin covers the rotor facing surface.
- One aspect of the molded motor according to the present disclosure includes the above stator unit and a rotor facing the stator core of the stator unit.
- One aspect of the method for manufacturing a stator unit according to the present disclosure includes a first step of placing a stator having a stator core and a coil wound around the stator core in a mold; and a second step of molding a mold resin that covers the stator by curing a liquid resin, wherein the stator core is supported by pins in the first step and the second step, and the pins are: It supports the surface of the stator core other than the rotor facing surface.
- FIG. 1 is a perspective view of a molded motor according to an embodiment when viewed obliquely from above.
- FIG. 2 is a perspective view of the molded motor according to the embodiment when viewed obliquely from below.
- FIG. 3 is a cross-sectional view of the molded motor according to the embodiment when cut along a plane parallel to the direction in which the axis of the rotating shaft extends.
- 4 is a cross-sectional view of the molded motor according to the embodiment taken along line IV-IV of FIG. 3.
- FIG. FIG. 5 is a plan view of steel plates in the stator core according to the embodiment.
- FIG. 6A is a diagram illustrating a method of manufacturing the stator unit according to the embodiment; FIG.
- FIG. 6B is a diagram illustrating a method of manufacturing the stator unit according to the embodiment
- 7A and 7B are diagrams for explaining a method of manufacturing a stator unit according to Modification 1.
- FIG. 8A and 8B are diagrams for explaining a method of manufacturing a stator unit according to Modification 2.
- FIG. 9A and 9B are diagrams for explaining a method of manufacturing a stator unit according to Modification 3.
- FIG. 10A and 10B are diagrams illustrating a method of manufacturing a stator unit according to Modification 4.
- FIG. 11A and 11B are diagrams illustrating a method of manufacturing a stator unit according to Modification 5.
- each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in all the drawings, substantially the same configurations are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified. Also, in this specification, the terms “upper” and “lower” do not necessarily indicate upward (vertically upward) and downward (vertically downward) directions in absolute spatial recognition.
- FIG. 1 is a perspective view of a molded motor 1 according to an embodiment when viewed obliquely from above.
- FIG. 2 is a perspective view of the molded motor 1 as seen obliquely from below.
- FIG. 3 is a cross-sectional view of the molded motor 1 taken along a plane parallel to the direction in which the axis C of the rotating shaft 21 extends.
- FIG. 4 is a cross-sectional view of the molded motor 1 taken along line IV-IV of FIG.
- the molded motor 1 includes a stator 10, a rotor 20 rotated by the magnetic force of the stator 10, and a mold resin 30 covering the stator 10. Molded motor 1 further includes bearing 40 , first bracket 50 , second bracket 60 , and circuit board 70 . In the molded motor 1 , the molded resin 30 and the second bracket 60 form an outer shell of the molded motor 1 .
- the stator 10 , the mold resin 30 , the first bracket 50 and the circuit board 70 constitute a stator unit 2 . That is, the stator unit 2 includes the stator 10, the mold resin 30, the first bracket 50 and the circuit board 70. As shown in FIG.
- the molded motor 1 is a brushless motor that does not use brushes.
- the molded motor 1 is an inner rotor type motor in which the rotor 20 is arranged inside the stator 10 .
- the molded motor 1 can be used, for example, as a fan motor in a blower.
- the molded motor 1 is entirely covered with the molding resin 30, so it is useful for electrical equipment used in humid environments.
- the air blower can be used in electrical equipment such as refrigerators and air conditioners.
- the molded motor 1 is a fan motor mounted on a cold air circulation blower (inside fan) in a refrigerator.
- FIG. 1 Each component of the molded motor 1 will be described in detail below with reference to FIGS. 3 and 4.
- FIG. 3 Each component of the molded motor 1 will be described in detail below with reference to FIGS. 3 and 4.
- stator 10 faces the rotor 20.
- stator 10 is arranged to face the rotor 20 with a small air gap between the stator 10 and the rotor 20 .
- Stator 10 is arranged outside rotor 20 so as to surround rotor 20 .
- An air gap between the stator 10 and the rotor 20 is, for example, approximately 0.3 mm.
- the stator 10 generates magnetic force acting on the rotor 20 .
- the stator 10 is configured to generate magnetic flux on the air gap surface with the rotor 20 .
- the stator 10 has a stator core 11, coils 12, and insulators 13.
- stator core 11 faces the rotor 20. Specifically, stator core 11 is arranged to surround rotor 20 . Stator core 11 is arranged to surround rotor yoke 22 and magnets 23 of rotor 20 .
- the stator core 11 has a rotor facing surface 11S that faces the rotor 20 . That is, the rotor facing surface 11S is an air gap surface of the stator 10 with respect to the rotor 20. As shown in FIG. Since the molded motor 1 is an inner rotor type motor, the rotor facing surface 11S is the inner peripheral surface (the inner surface in the radial direction) of the stator core 11 .
- the stator core 11 is a stator iron core that serves as the core of the stator 10 , and generates magnetic force for rotating the rotor 20 by energizing the coil 12 . As shown in FIG. 4 , stator core 11 is annularly formed to surround rotor 20 .
- the stator core 11 has a plurality of teeth 11a.
- Each of the multiple teeth 11 a protrudes toward the rotor 20 .
- the plurality of teeth 11 a are radially arranged, each extending in a direction (radial direction) perpendicular to the axis C of the rotating shaft 21 .
- the plurality of teeth 11a are provided at equal intervals in the rotation direction (circumferential direction) of the rotating shaft 21 while forming slots between two adjacent teeth 11a.
- a front end portion of each tooth 11 a is a core inner diameter portion of the stator core 11 .
- the rotor facing surface 11S is the front end surface of the tooth 11a. That is, each of the plurality of teeth 11a has a front end surface as the rotor facing surface 11S. That is, the front end surfaces of the teeth 11 a form an air gap surface with respect to the rotor 20 of the stator 10 .
- the stator core 11 has a yoke 11b.
- Each of the plurality of teeth 11a protrudes toward the rotor 20 from the yoke 11b.
- Each of the multiple teeth 11 a faces a rotor yoke 22 of the rotor 20 .
- Yoke 11b is formed in an annular shape so as to surround rotor 20 .
- the yoke 11b is a back yoke formed outside each tooth 11a.
- the stator core 11 is composed of a plurality of steel plates 14 laminated in the direction of the axis C of the rotating shaft 21 .
- Each of the plurality of steel plates 14 is, for example, an electromagnetic steel plate punched into a predetermined shape.
- FIG. 5 is a plan view of steel plate 14 in stator core 11 according to the embodiment.
- the stator core 11 is a laminate in which a plurality of steel plates 14 shown in FIG. 5 are laminated.
- each steel plate 14 includes a plurality of tooth portions 14 a corresponding to the plurality of teeth 11 a of the stator core 11 and yoke portions 14 b corresponding to the yokes 11 b of the stator core 11 .
- the plurality of teeth portions 14a are formed so as to protrude radially inward from the annular yoke portion 14b. All of the plurality of steel plates 14 in the stator core 11 have the same shape. However, it is not limited to this.
- the stator core 11 is not limited to a laminate of a plurality of steel plates 14, and may be a bulk body made of a magnetic material.
- the coil 12 shown in FIGS. 3 and 4 is the armature winding of the stator 10.
- Coil 12 is wound around stator core 11 .
- the coil 12 is a wound coil wound around each of the plurality of teeth 11 a of the stator core 11 in a coil shape.
- the coil 12 is wound around each tooth 11 a via an insulator 13 .
- the coil 12 is a concentrated winding coil wound around each tooth 11a.
- Coils 12 are housed in slots of stator core 11 .
- the coil 12 has a 3-phase winding so that the rotor 20 can be rotated as, for example, a 3-phase synchronous motor.
- the coil 12 is composed of unit coils of three phases, U-phase, V-phase, and W-phase, which are electrically 120 degrees out of phase with each other. That is, the coil 12 wound around each tooth 11a is energized and driven by a three-phase alternating current that is energized in phase units of the U-phase, the V-phase, and the W-phase. Thereby, the main magnetic flux of the stator 10 is generated in each tooth 11 a of the stator core 11 . That is, each tooth 11a is a magnetic pole tooth, and is an electromagnet that generates magnetic force when the coil 12 is energized.
- the ends of the coils 12 of each phase are connected at the winding connection portion of the circuit board 70 .
- the circuit board 70 is formed with pattern wirings electrically connected to the coils 12 for each of the U-phase, V-phase, and W-phase.
- the ends of the coils 12 of each phase are joined to the pattern wiring of the circuit board 70 by soldering or the like.
- the insulator 13 is a coil bobbin.
- the insulator 13 has a frame-shaped frame portion around which the coil 12 is wound. Specifically, the frame portion of insulator 13 is formed so as to cover each tooth 11 a of stator core 11 .
- the insulator 13 is, for example, a resin molded product made of an insulating resin material such as polybutylene terephthalate (PBT).
- the stator 10 configured in this manner generates a magnetic force acting on the rotor 20 when a current flows through the coil 12 .
- the stator 10 generates magnetic flux on the air gap surface between the rotor yoke 22 of the rotor 20 and alternately has N poles and S poles along the rotation direction (circumferential direction) of the rotating shaft 21 .
- the direction of the main magnetic flux generated by stator 10 is the direction (radial direction) perpendicular to axis C of rotating shaft 21 .
- the rotor 20 (rotor) is arranged to face the stator 10 .
- the rotor 20 faces the stator 10 in a direction (radial direction) perpendicular to the direction of the axis C of the rotating shaft 21 .
- the rotor 20 is arranged via the stator 10 and an air gap as described above. The rotor 20 is rotated by magnetic force generated in the stator 10 .
- the rotor 20 has a configuration in which N poles and S poles that generate magnetic flux are alternately present in the circumferential direction. Thereby, the rotor 20 generates magnetic force acting on the stator 10 .
- the direction of the magnetic flux generated by the rotor 20 is perpendicular to the direction of the axis C of the rotating shaft 21 (axis direction). That is, the direction of the magnetic flux generated by the rotor 20 is the radial direction.
- the rotor 20 has a rotating shaft 21 , a rotor yoke 22 and magnets 23 .
- the rotating shaft 21 is a shaft having an axis C.
- the rotating shaft 21 is an elongated rod-shaped member such as a metal rod.
- the axis C of the rotating shaft 21 is the center of rotation of the rotor 20 .
- the longitudinal direction (stretching direction) of the rotating shaft 21 is the direction of the axis C (axial direction).
- the rotating shaft 21 is fixed to the rotor yoke 22. Specifically, the rotating shaft 21 is inserted into a through hole provided in the center of the rotor yoke 22 and fixed to the rotor yoke 22 so as to extend on both sides of the rotor yoke 22 in the direction in which the axis C extends. .
- the rotating shaft 21 is fixed to the rotor yoke 22 by, for example, press fitting into a through hole of the rotor yoke 22 or shrink fitting.
- the rotating shaft 21 is held by bearings 40 .
- the bearing 40 is a bearing that rotatably supports the rotating shaft 21 .
- Bearing 40 is fixed to first bracket 50 .
- the first bracket 50 is a cup-shaped metal member having a flange portion.
- a second bracket 60 is arranged on the opposite side of the first bracket 50 .
- the second bracket 60 is a cup-shaped metal member having a flange portion with a larger diameter than the flange portion of the first bracket 50 .
- the first bracket 50 and the second bracket 60 are fixed to the mold resin 30 . Specifically, the first bracket 50 is fixed so as to be partially embedded in the mold resin 30 .
- the second bracket 60 is fixed so as to be fitted into the opening of the mold resin 30 .
- a portion on one side of the rotating shaft 21 protrudes from the first bracket 50 . That is, the rotating shaft 21 passes through the first bracket 50 .
- a first portion of the rotating shaft 21 is a portion (output shaft) on the output side of the rotating shaft 21 . Accordingly, a load driven by the molded motor 1 is attached to the first portion of the rotary shaft 21 protruding from the first bracket 50 .
- a load driven by the molded motor 1 is attached to the first portion of the rotary shaft 21 protruding from the first bracket 50 .
- a rotating fan is attached to the first portion of the rotating shaft 21 as a load.
- the second part on the other side of the rotating shaft 21 does not protrude from the second bracket 60 .
- the second portion of the rotating shaft 21 is a portion (counter-output shaft) of the rotating shaft 21 on the non-output side.
- the rotor yoke 22 is a cup-shaped magnetic member made of a magnetic material. Specifically, the rotor yoke 22 is formed in a cylindrical shape with a bottom. The rotor yoke 22 is arranged so that its bottom portion is located on the second bracket 60 side. A through hole through which the rotating shaft 21 is inserted is provided in the center of the bottom of the rotor yoke 22 .
- the magnet 23 is fixed to the rotor yoke 22. Magnet 23 faces stator core 11 of stator 10 .
- the rotor 20 is of a surface magnet type (SPM; Surface Permanent Magnetic). Therefore, magnet 23 directly faces stator core 11 of stator 10 via an air gap. Therefore, the outer surface of the magnet 23 is an exposed surface, which is the outer surface of the rotor 20 .
- SPM Surface Permanent Magnetic
- the magnet 23 is a permanent magnet made of, for example, a sintered magnet.
- the magnet 23 is configured such that N poles and S poles alternately exist along the circumferential direction.
- the magnets 23 are arranged so that the direction of the magnetic poles is in the direction (radial direction) orthogonal to the direction of the axis C of the rotating shaft 21 (the Z-axis direction). That is, the magnet 23 is magnetized so that the direction of the magnetic poles is the radial direction.
- the magnet 23 may be composed of a plurality of permanent magnets.
- the plurality of permanent magnets are annularly arranged along the circumferential direction of the rotor yoke 22 .
- Two adjacent permanent magnets are arranged such that the directions of the magnetic poles of the south pole and the north pole are opposite to each other.
- the mold resin 30 covers the stator 10. That is, the mold resin 30 covers the stator core 11 and the coils 12 . Mold resin 30 covers the entire stator 10 . Specifically, the mold resin 30 covers the stator core 11, the coils 12 and the insulators 13 so that the stator core 11, the coils 12 and the insulators 13 are invisible from the outside.
- the mold resin 30 covers the rotor facing surface 11S of the stator core 11 .
- the rotor facing surface 11S is the front end surface of the tooth 11a. Therefore, the mold resin 30 covers the front end surfaces of the teeth 11a.
- the film thickness of the mold resin 30 in the portion covering the front end face of the tooth 11a is thin. That is, the mold resin 30 has a thin resin film 30a that covers the front end surfaces of the teeth 11a as the rotor facing surface 11S.
- the film thickness of the resin film 30a is, for example, 1 mm or less, preferably 0.1 mm or less. In this embodiment, the resin film 30a is 0.05 mm.
- the molding resin 30 covers the entire teeth 11a so that the teeth 11a are completely invisible. In other words, in all the teeth 11 a , all of the portions exposed without the mold resin 30 are covered with the mold resin 30 . Therefore, the entire surfaces of the teeth 11a are not exposed.
- the mold resin 30 is also filled in the slots between the two adjacent teeth 11a.
- the mold resin 30 also covers the circuit board 70 .
- the mold resin 30 covers the entire circuit board 70 so that the circuit board 70 is also invisible.
- a portion of the lead bush mounted on the circuit board 70 is exposed from the mold resin 30 .
- a lead wire connected to an external power supply is pulled out from the lead bush.
- the mold resin 30 is made of an insulating resin material with excellent thermal conductivity, such as polyester resin or epoxy resin.
- the mold resin 30 is made of thermosetting resin.
- unsaturated polyester which is a thermosetting resin, can be used as the resin material of the mold resin 30 .
- the molded resin 30 constitutes the outer shell of the molded motor 1 and the stator unit 2. Therefore, the mold resin 30 is a housing that encloses the rotor 20 . Specifically, the mold resin 30 has a low-profile cylindrical main body that surrounds the rotor 20 and covers the stator 10 over the entire circumferential direction. A body portion of the molded resin 30 is a body portion of the molded motor 1 .
- the mold resin 30 is formed with pin holes 31 into which pins for supporting the stator core 11 were inserted when the mold resin 30 was molded. Therefore, the pin hole 31 allows insertion of a pin for supporting the stator core 11 when molding the mold resin 30 .
- the surface of the stator core 11 includes a pin hole surface 11T that serves as the inner surface of the pin hole 31 .
- Pin hole 31 is formed so as to recess from the outer surface of mold resin 30 to the surface of stator core 11 .
- the pin hole 31 is formed to extend in the direction of the axis C of the rotation shaft 21 from the first bracket 50 side outer surface of the mold resin 30 in the direction of the axis C of the rotation shaft 21 . ing.
- the pin hole 31 is connected to the side surface of the stator core 11 near the bottom. In other words, the formation of the pin holes 31 exposes a portion of the surface of the stator core 11 . Therefore, the pin hole surface 11T in the stator core 11 is an exposed surface.
- the surface of the stator core 11 is exposed from the mold resin 30 only at the pin holes 31 . That is, only the pin hole surface 11 ⁇ /b>T of the entire surface of the stator core 11 is exposed from the mold resin 30 . Therefore, the stator core 11 is covered with the mold resin 30 except for the portion exposed through the pin holes 31 .
- the pin hole surface 11T of the stator core 11 is a surface of the stator core 11 other than the rotor facing surface 11S.
- the rotor facing surface 11S is the inner peripheral surface of the stator core 11 . Therefore, the pin hole surface 11T is a surface of the stator core 11 other than the inner peripheral surface.
- the pin hole surface 11T is the outer surface of the stator core 11 in the direction (radial direction) perpendicular to the direction of the axis C of the rotating shaft 21 of the rotor 20 . That is, the pin hole surface 11T is a lateral outer surface (that is, a side surface) of the stator core 11 . In this case, the pin hole surface 11T may be a part of the lateral outer surface of the stator core 11 instead of the entire lateral outer surface of the stator core 11 . In other words, rather than the entire lateral outer surface of stator core 11 being exposed, only a portion of the lateral outer surface of stator core 11 may be exposed.
- the pin hole surface 11T of the stator core 11 is formed so as to be recessed radially from the side surface of the stator core 11 .
- a notch portion 14 c is formed at the outer peripheral end portion of the steel plate 14 . Therefore, the notch portion 14 c forms part of the pin hole 31 . Therefore, the pin hole surface 11T of the stator core 11 is a side end surface of the notch portion 14c formed in the steel plate 14. As shown in FIG.
- the cutout portions 14c are formed at a plurality of locations on the yoke portion 14b of the steel plate 14 .
- the steel plate 14 is provided with three notch portions 14c at regular intervals along the circumferential direction. Therefore, three pin holes 31 are formed in the mold resin 30 .
- the pin hole surfaces 11T also exist at three locations on the stator core 11 .
- the shape of the notch portion 14 c corresponds to the outer shape of the pin that supports the stator core 11 .
- the shape of the notch portion 14c is a shape including an arc.
- a plurality of circuit components are mounted on the circuit board 70 covered with the mold resin 30 for converting the power supply power supplied from the external power supply into the drive power supplied to the coil 12 .
- a plurality of circuit components mounted on the circuit board 70 constitute a drive circuit that generates drive power corresponding to each of the U-phase, V-phase, and W-phase of the coil 12 . Therefore, circuit board 70 is electrically connected to coil 12 .
- the circuit components mounted on the circuit board 70 and the coil 12 are electrically connected.
- a field current flows through the coil 12 and magnetic flux is generated in the stator core 11 . That is, magnetic flux is generated from the stator 10 toward the rotor 20 .
- magnet 23 generates a magnetic flux toward stator 10 .
- the magnetic force generated by the interaction between the magnetic flux generated in the stator core 11 and the magnetic flux generated in the rotor 20 becomes torque for rotating the rotor 20, and the rotor 20 rotates.
- the stator unit 2 of the present embodiment includes the stator core 11, the coils 12, and the mold resin 30.
- the stator core 11 faces a rotor 20 included in the molded motor 1 .
- a coil 12 is wound around the stator core 11 .
- a mold resin 30 covers the stator core 11 and the coils 12 .
- the stator core 11 has a rotor facing surface 11S facing the rotor 20, and the mold resin 30 covers the rotor facing surface 11S.
- the stator core 11 is arranged so as to surround the rotor 20, and the rotor facing surface 11S is preferably the inner peripheral surface of the stator core 11.
- a part of the surface of the stator core 11 is preferably exposed.
- the stator core 11 preferably has a plurality of teeth 11a protruding toward the rotor 20, and each of the plurality of teeth 11a preferably has a front end surface as the rotor facing surface 11S.
- the molded motor 1 of the present embodiment includes the stator unit 2 described above and a rotor 20 facing the stator core 11 of the stator unit 2 .
- FIG. 6A is a diagram illustrating a method of manufacturing the stator unit 2 according to the embodiment.
- FIG. 6B is a diagram illustrating a method of manufacturing the stator unit 2 according to the embodiment.
- stator 10 having the stator core 11 and the coil 12 wound around the stator core 11 is placed in the mold 80 (first step: stator placement step).
- stator 10 having the stator core 11 around which the coil 12 is wound via the insulator 13, the first bracket 50, and the circuit board 70 on which the circuit components are mounted and the connection with the coil 12 is completed. , is placed in the mold 80 of the injection molding machine.
- the mold 80 is composed of a plurality of blocks.
- the injection molding machine according to this embodiment is of a vertical type. Therefore, the mold 80 is configured to open and close in the vertical direction.
- the mold 80 has an upper mold 81 as a first mold, a lower mold 82 as a second mold, and a center mold 83 as a third mold.
- the mold 80 will be described using a three-divided mold.
- the mold 80 is not limited to being divided into three, and may be divided into two or four or more.
- the stator core 11 is supported by the pins 90.
- the pins 90 support surfaces of the stator core 11 other than the rotor facing surface 11S. That is, the pins 90 support surfaces other than the inner peripheral surface of the stator core 11 .
- the pins 90 support the lateral outer surfaces (that is, side surfaces) of the stator core 11 .
- the stator core 11 is positioned by bringing the pin 90 into contact with the stator core 11 .
- the pin 90 is a pinback pin and can be moved vertically. Specifically, by raising the pin 90, the pin 90 is inserted from the outside to the inside of the mold 80, the pin 90 contacts the surface of the stator core 11 to support the stator core 11, and the stator core 11 is positioned.
- the stator core 11 is positioned by fitting the pin 90 into the notch portion 14c of the steel plate 14 (see FIG. 5). As a result, the stator core 11 can be positioned in the rotational direction. In addition, by determining the position of the pin 90 using the steel plate 14 in which the cutout portion 14c is not formed, it is possible to suppress the deflection in the direction of the axis C of the rotating shaft 21 .
- the mold resin 30 that covers the stator 10 is molded by injecting liquid resin into the mold 80 and curing the liquid resin (second step: mold resin molding step).
- a liquid resin is injected into the mold 80 through a gate (not shown) provided in the mold 80 as a resin injection part to fill the inside of the mold 80 with the liquid resin.
- the molding resin 30 is formed into a predetermined shape by curing the liquid resin.
- a thermosetting resin is used as the liquid resin, so that the liquid resin is cured by heating.
- the mold resin 30 covers the rotor facing surface 11S of the stator core 11 . That is, the inner peripheral surface of the stator core 11 is covered with the resin film 30a.
- the pin 90 is lowered vertically and ejected to the outside of the mold 80 .
- a pin hole 31 is formed in the portion of the mold resin 30 where the pin 90 was present. Therefore, the shape of pin hole 31 corresponds to the shape of pin 90 .
- the pin 90 is ejected along the direction of the axis C of the rotating shaft 21 .
- the pin hole 31 is formed so as to extend in the direction of the axis C of the rotating shaft 21 .
- the pin hole 31 is formed to extend vertically upward from the lower outer surface on the first bracket 50 side. That is, the pin hole 31 extends vertically.
- stator unit 2 in which the entire stator 10 is covered with the mold resin 30 can be produced.
- the molded motor 1 is completed by assembling other parts such as the rotor 20 to the stator unit 2 .
- the mold resin 30 that covers the stator core 11 and the coils 12 covers the rotor facing surface 11S of the stator core 11 .
- the rotor facing surface 11 ⁇ /b>S is covered with the resin film 30 a of the mold resin 30 .
- stator unit 2 As described above, according to the stator unit 2 according to the present embodiment, it is possible to suppress rusting of the rotor facing surface 11S of the stator core 11 without applying antirust coating.
- the stator unit 2 it is possible to realize the molded motor 1 excellent in water resistance without applying antirust coating to the stator core 11 .
- the molded motor 1 having a waterproof structure at low cost and with high reliability.
- the molded motor 1 according to this embodiment is useful as a fan motor used in a high humidity environment.
- the high-humidity environment is promoted, which is more useful.
- the mold resin 30 completely covers the entire tooth 11a including the rotor facing surface 11S. Therefore, it is possible to suppress the generation of resin scraps and to suppress the generation of abnormal noise.
- the gaps of the mold resin 30 do not exist at the tip portions of the teeth 11a. As a result, it is possible to suppress the generation of resin waste due to the mold resin 30 . In addition, it is possible to suppress the generation of noise.
- the mold resin 30 is formed with pin holes 31 into which the pins 90 that support the stator core 11 can be inserted when the mold resin 30 is molded.
- the surface of the stator core 11 includes a pin hole surface 11T that serves as the inner surface of the pin hole 31 .
- the pin hole surface 11T is a surface of the stator core 11 other than the inner peripheral surface. Specifically, the pin hole surface 11T is the outer surface of the stator core 11 in the direction perpendicular to the direction of the axis C of the rotating shaft 21 . That is, the pin hole surface 11T is the lateral outer surface of the stator core 11 .
- stator core 11 When the pin hole 31 is formed in the mold resin 30, the outer surface of the stator core 11 is exposed at the pin hole surface 11T. Therefore, the stator core 11 may rust on the pin hole surface 11T.
- the pin hole surface 11T is not the inner peripheral surface of the stator core 11, which is the rotor-facing surface 11S, but the outer surface on the side of the stator core 11, so that the rotor-facing surface 11S that is not exposed is Only the exposed pin hole surface 11T will rust without rusting.
- the pin hole surface 11T is the lateral outer surface of the stator core 11
- the pin hole surface 11T is not the entire lateral outer surface of the stator core 11 as in the present embodiment. It may be part of the lateral outer surface.
- stator core 11 With this configuration, the entire lateral outer surface of stator core 11 is not exposed, and only a portion of the lateral outer surface of stator core 11 is exposed. That is, as much of the lateral outer surface of stator core 11 as possible is covered with molding resin 30 to minimize the exposed surface of the lateral outer surface of stator core 11 .
- the degree of rust can be reduced. For example, the amount of rust can be reduced or the time until rust can be lengthened.
- the length of the pin hole surface 11T which is the exposed surface of the stator core 11 (the length in the direction of the axis C of the rotating shaft 21), is less than half the length of the lateral outer surface of the stator core 11. is preferably 1/3 or less of the length of the lateral outer surface of the stator core 11, and more preferably 1/4 or less of the length of the lateral outer surface of the stator core 11. 11 can be supported.
- the length of the pin hole surface 11T, which is the exposed surface of the stator core 11, is 2 mm from the outer surface (lower surface in FIG. 3) of the rotating shaft 21 of the stator core 11 in the direction of the axis C.
- the pin hole surface 11T which is part of the inner surface of the pin hole 31 of the mold resin 30, is not the outer peripheral surface of the mold resin 30. Therefore, the outer peripheral surface of the mold resin 30 forming the outline of the stator unit 2 is completely sealed with resin. That is, both the inner peripheral surface and the outer peripheral surface of the stator unit 2 are completely covered with the molding resin 30 . Thereby, even if the pin holes 31 are formed in the mold resin 30, the molded motor 1 excellent in water resistance can be realized.
- the method of manufacturing the stator unit 2 includes a first step of placing the stator 10 having the stator core 11 and the coil 12 wound around the stator core 11 in the mold 80, and filling the mold 80 with liquid resin. and a second step of molding the mold resin 30 covering the stator 10 by injecting and curing the liquid resin.
- the stator core 11 is supported by the pins 90 in the first step and the second step.
- the pins 90 support surfaces of the stator core 11 other than the rotor facing surface 11S.
- the stator core 11 can be covered with the mold resin 30 without exposing the rotor facing surface 11S. Therefore, it is possible to prevent the rotor-facing surface 11S of the stator core 11 from rusting without applying an antirust coating.
- the pins 90 are raised and inserted into the mold 80 to support the stator core 11 with the pins 90 .
- FIG. 7A and 7B are diagrams illustrating a method of manufacturing the stator unit 2A according to Modification 1.
- FIG. FIG. 7 is a diagram corresponding to FIG. 6B, but the mold 80 is omitted in FIG.
- the pins 90 support the outer surface of the stator core 11 in the direction orthogonal to the direction of the axis C of the rotating shaft 21, as in the above embodiment. That is, the pins 90 support the lateral outer surface of the stator core 11 .
- the pin 90 is ejected from the mold 80 along the direction of the axis C of the rotating shaft 21, as in the above-described embodiment.
- the pin hole 31A formed in the mold resin 30A extends in the direction of the axis C of the rotary shaft 21. As shown in FIG. That is, the pin hole 31A extends vertically.
- the pin 90 is lifted vertically upward and ejected from the mold 80 .
- the pin hole 31A in this modification is formed to extend vertically downward from the upper outer surface, which is the side opposite to the first bracket 50 side. Also in this modified example, the same effect as that of the above-described embodiment can be obtained.
- the pin 90 abuts only the lateral outer surface of the stator core 11 .
- the pin 90 abuts on one surface of the stator core 11 to determine the position of the stator core 11 .
- the position of stator core 11 may be determined by coming into contact with a plurality of different surfaces of stator core 11 .
- FIG. 8A and 8B are diagrams illustrating a method of manufacturing the stator unit 2B according to Modification 2.
- FIG. 8 is also a diagram corresponding to FIG. 6B.
- the mold 80 is omitted in FIG. 8 as well.
- the stator core 11 is supported by the steps 91 of the pins 90 .
- the pins 90 are in contact with both the lateral outer surface and the vertical outer surface of the stator core 11 . Therefore, pin hole surface 11T in stator core 11 includes the outer surface of stator core 11 in the direction orthogonal to the direction of axis C of rotating shaft 21 and the outer surface of the stator core in the direction of axis C of rotating shaft 21 . That is, the pin hole surface 11T of the stator core 11 includes both the lateral outer surface and the vertical outer surface of the stator core 11 . Specifically, the pin 90 is in contact with both a portion of the lateral outer surface and a portion of the lower outer surface of the stator core 11 . Also in this modified example, the same effect as that of the above-described embodiment can be obtained.
- the pin 90 is vertically lowered and ejected from the mold 80 in the same manner as in the above-described embodiment.
- the pin hole 31B formed in the mold resin 30B is formed to extend vertically upward from the lower outer surface on the first bracket 50 side.
- the pins 90 support not only the lateral outer surface of the stator core 11 but also the lower outer surface of the stator core 11 . That is, the pin 90 supports two surfaces of the stator core 11, namely, the outer peripheral surface and the lower surface. Thereby, the stator core 11 can be stably supported when the stator 10 is arranged in the mold 80 . Moreover, the stator core 11 can be positioned with high precision.
- the pin 90 is in contact with both the lateral outer surface and the vertical outer surface of the stator core 11 .
- the pin 90 without the step 91 may be used so that the pin 90 abuts only the outer surface of the stator core 11 in the vertical direction to support the stator core 11 so as to push it up. That is, the pins 90 may support the outer surface of the stator core 11 in the vertical direction.
- the pin 90 is moved vertically.
- it is not limited to this.
- stator core 11 may be positioned not from the direction of the axis C of the rotating shaft 21 but from the direction perpendicular to the axis C of the rotating shaft 21 (radial direction).
- 9A and 9B are diagrams illustrating a method of manufacturing the stator unit 2C according to Modification 3.
- FIG. 9 is also a diagram corresponding to FIG. 6B.
- the mold 80 is omitted in FIG. 9 as well.
- the pins 90 support the outer surface of the stator core 11 in the direction orthogonal to the direction of the axis C of the rotating shaft 21, as in the above embodiment. That is, the pins 90 support the lateral outer surface of the stator core 11 .
- the pin 90 is ejected from the mold 80 along a direction perpendicular to the direction of the axis C of the rotating shaft 21 (9 in the figure is the horizontal direction).
- a pin hole 31C formed in the mold resin 30C extends in a direction perpendicular to the direction of the axis C of the rotating shaft 21.
- the pin hole 31C extends laterally. Also in this modified example, the same effect as that of the above-described embodiment can be obtained.
- the pin 90 abuts only the lateral outer surface of the stator core 11 .
- it is not limited to this.
- FIG. 10A and 10B are diagrams illustrating a method of manufacturing the stator unit 2D according to Modification 4.
- FIG. FIG. 10 also corresponds to FIG. 6B, but the die 80 is omitted in FIG. 10 as well.
- the stator core 11 is supported by the steps 91 of the pins 90 as in the second modified example.
- the pins 90 are in contact with both the lateral outer surface and the vertical outer surface of the stator core 11 . That is, the pin hole surface 11T of the stator core 11 includes both the lateral outer surface and the vertical outer surface of the stator core 11 . Also in this modified example, the same effects as in the above-described embodiment and modified example 2 are obtained.
- the pin 90 is horizontally moved to eject from the mold 80, as in the third modified example.
- the pin hole 31D formed in the mold resin 30D extends in a direction perpendicular to the direction of the axis C of the rotating shaft 21. As shown in FIG. That is, the pin hole 31D extends laterally.
- the pin 90 is brought into contact with the side surface, top surface, or bottom surface of the stator core 11 .
- it is not limited to this.
- stator core 11E may be supported by inserting pins 90 into core holes 11c formed in the stator core 11E.
- 11A and 11B are diagrams illustrating a method of manufacturing a stator unit 2E according to Modification 5.
- FIG. FIG. 11 is also a diagram corresponding to FIG. 6B.
- the mold 80 is omitted in FIG. 11 as well.
- the core hole 11c of the stator core 11E is recessed inward from the outer surface of the stator core 11E.
- the core holes 11c can be formed in the stator core 11E.
- a pin 90 is inserted into the core hole 11c of the stator core 11E.
- the pin 90 comes into contact with the inner surface of the core hole 11c.
- a pin hole 31E formed in the mold resin 30E by the pin 90 communicates with the core hole 11c of the stator core 11E. Also in this modified example, the same effect as that of the above-described embodiment can be obtained.
- the stator core 11E can be stably supported when the stator 10 is arranged in the mold 80. Moreover, the stator core 11E can be positioned with high accuracy. By inserting the pins 90 into the core holes 11c of the stator core 11E to form a necessary minimum pressing structure, the area of the exposed surface of the stator core 11 can be reduced as much as possible. As a result, rusting of the stator core 11 can be further suppressed.
- the core hole 11c formed in the stator core 11E may be a through hole penetrating the stator core 11E.
- the core hole 11 c is formed so as to be recessed along the direction of the axis C of the rotating shaft 21 from the upper surface or the lower surface of the stator core 11 .
- it may be recessed from the side surface of stator core 11 along a direction orthogonal to the direction of axis C of rotating shaft 21 .
- the pin holes 31 formed in the mold resin 30 remain hollow.
- the pin holes 31 may be filled with resin such as putty.
- the method for manufacturing the stator unit 2 described above further includes a step of filling the pin holes 31 formed by removing the pins 90 from the mold resin 30 with resin after the second step (molding resin molding step). .
- the pin 90 is pulled out from the liquid resin before the liquid resin hardens, and the pin 90 is inserted into the mold resin 30. Holes 31 can be prevented from being formed. As a result, the entire surface of stator core 11 is completely covered with mold resin 30 . Therefore, it is possible to prevent the entire surface of the stator core 11 from being exposed.
- the mold resin 30 is formed with pin holes 31 into which the pins 90 that support the stator core 11 can be inserted when the mold resin 30 is molded. , and a pin hole surface 11T that is the inner surface of the pin hole 31.
- the pin hole surface 11T is a surface of the stator core 11 other than the inner peripheral surface.
- the pin hole surface 11T may be the outer surface of the stator core 11 in the direction orthogonal to the axial direction of the rotating shaft 21 of the rotor 20.
- the pin hole surface 11T may be the outer surface of the stator core 11 in the axial direction of the rotating shaft 21 of the rotor 20.
- the pin hole surface 11T may include the outer surface of the stator core 11 in the direction perpendicular to the axial direction of the rotating shaft 21 of the rotor 20 and the outer surface of the stator core 11 in the axial direction of the rotating shaft 21 of the rotor 20.
- the stator core 11 preferably has a core hole 11c recessed from the outer surface toward the inside, and the pin hole 31 preferably communicates with the core hole 11c.
- the pin hole 31 is preferably filled with resin.
- the surface of the stator core 11 preferably has an exposed surface located on the opposite side of the rotor facing surface 11S in the direction orthogonal to the axial direction of the rotating shaft 21 of the rotor 20 .
- the rotor 20 is of the SPM type in the above embodiment, it is not limited to this.
- the rotor 20 may be of an interior permanent magnet (IPM) type in which a plurality of permanent magnets are embedded in the rotor core.
- the permanent magnet may be a sintered magnet or a bonded magnet.
- the molded motor 1 is used for a refrigerator.
- the molded motor 1 according to the present disclosure may be used for products other than refrigerators.
- the molded motor 1 according to the present disclosure is particularly useful for products that require water resistance, such as showcases, air conditioners, and dryers.
- the present disclosure can be used for equipment in various fields, including fan motors used in refrigerators or air conditioners.
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Abstract
Description
実施の形態に係るモールドモータ1の全体の構成について、図1~図4を用いて説明する。図1は、実施の形態に係るモールドモータ1を斜め上方から見たときの斜視図である。図2は、同モールドモータ1を斜め下方から見たときの斜視図である。図3は、回転軸21の軸心Cが延伸する方向と平行な平面で切断したときの同モールドモータ1の断面図である。図4は、図3のIV-IV線における同モールドモータ1の断面図である。
以上、本開示の技術について、実施の形態に基づいて説明したが、本開示は、上記実施の形態に限定されるものではない。
2、2A、2B、2C、2D、2E ステータユニット
10 ステータ
11、11E ステータコア
11a ティース
11b ヨーク
11c コア穴
11S ロータ対向面
11T ピン穴面
12 コイル
13 インシュレータ
14、14E 鋼板
14a ティース部
14b ヨーク部
14c 切り欠き部
20 ロータ
21 回転軸
22 ロータヨーク
23 磁石
30、30A、30B、30C、30D、30E モールド樹脂
30a 樹脂膜
31、31A、31B、31C、31D、31E ピン穴
40 軸受
50 第1ブラケット
60 第2ブラケット
70 回路基板
80 金型
81 上金型
82 下金型
83 中央金型
90 ピン
91 段差
Claims (20)
- モールドモータが備えるロータに対向するステータコアと、
前記ステータコアに巻かれたコイルと、
前記ステータコア及び前記コイルを覆うモールド樹脂と、を備えるステータユニットであって、
前記ステータコアは、前記ロータに対向するロータ対向面を有し、
前記モールド樹脂は、前記ロータ対向面を覆っている、
ステータユニット。 - 前記ステータコアは、前記ロータを囲むように配置され、
前記ロータ対向面は、前記ステータコアの内周面である、
請求項1に記載のステータユニット。 - 前記モールド樹脂には、前記モールド樹脂を成形するときに前記ステータコアを支持するピンが挿入可能なピン穴が形成されており、
前記ステータコアの表面には、前記ピン穴の内面となるピン穴面が含まれており、
前記ピン穴面は、前記ステータコアにおける前記内周面以外の表面である、
請求項2に記載のステータユニット。 - 前記ピン穴面は、前記ロータの回転軸の軸心方向と直交する方向における前記ステータコアの外表面である、
請求項3に記載のステータユニット。 - 前記ピン穴面は、前記ロータの回転軸の軸心方向における前記ステータコアの外表面である、
請求項3に記載のステータユニット。 - 前記ピン穴面は、前記ロータの回転軸の軸心方向と直交する方向における前記ステータコアの外表面と、前記ロータの回転軸の軸心方向における前記ステータコアの外表面とを含む、
請求項3に記載のステータユニット。 - 前記ステータコアは、外表面から内部に向かって窪むコア穴を有し、
前記ピン穴は、前記コア穴に連通している、
請求項3に記載のステータユニット。 - 前記ピン穴には、樹脂が充填されている、
請求項3~7のいずれか1項に記載のステータユニット。 - 前記ステータコアの表面の一部は露出している、
請求項1又は2に記載のステータユニット。 - 前記ステータコアの表面は、前記ロータの回転軸の軸心方向と直交する方向において、前記ロータ対向面の反対側に位置する面が露出している、
請求項9に記載のステータユニット。 - 前記ステータコアは、前記ロータに向かって突出する複数のティースを有し、
前記複数のティースの各々は、前記ロータ対向面として前端面を有する、
請求項1~10のいずれか1項に記載のステータユニット。 - 請求項1~11のいずれか1項に記載のステータユニットと、
前記ステータユニットが有する前記ステータコアに対向する前記ロータと、を備える、
モールドモータ。 - ステータコア及び前記ステータコアに巻かれたコイルを有するステータを金型に配置する第1工程と、
前記金型の内部に液状樹脂を注入して前記液状樹脂を硬化することで前記ステータを覆うモールド樹脂を成形する第2工程と、を含み、
前記第1工程及び前記第2工程において、前記ステータコアは、ピンによって支持されており、
前記ピンは、前記ステータコアにおけるロータ対向面以外の表面を支持している、
ステータユニットの製造方法。 - 前記ロータ対向面は、前記ステータコアの内周面である、
請求項13に記載のステータユニットの製造方法。 - 前記ピンは、前記ステータコアの側方の外表面を支持している、
請求項13又は14に記載のステータユニットの製造方法。 - 前記ピンは、前記ステータコアの上下方向の外表面を支持している、
請求項13又は14に記載のステータユニットの製造方法。 - 前記ピンは、段差を有し、
前記ステータコアは、前記ピンの前記段差で支持されている、
請求項13又は14に記載のステータユニットの製造方法。 - 前記第2工程において、前記液状樹脂が硬化する前に前記ピンを前記液状樹脂から抜くことで、前記モールド樹脂に前記ピンが挿入されたピン穴が形成されないようにする
請求項13~17のいずれか1項に記載のステータユニットの製造方法。 - さらに、前記第2工程の後に、前記モールド樹脂から前記ピンを抜くことで形成されるピン穴を樹脂で埋める工程を含む、
請求項13~17のいずれか1項に記載のステータユニットの製造方法。 - 前記モールド樹脂は、前記ロータ対向面を覆っている、
請求項13~19のいずれか1項に記載のステータユニットの製造方法。
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EP22824706.0A EP4358366A1 (en) | 2021-06-18 | 2022-05-10 | Stator unit, molded motor, and method of manufacturing stator unit |
CN202280042465.6A CN117501586A (zh) | 2021-06-18 | 2022-05-10 | 定子单元、模制马达及定子单元的制造方法 |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08196065A (ja) * | 1995-01-12 | 1996-07-30 | Matsushita Electric Ind Co Ltd | モールドモータ金型 |
JP2018098870A (ja) * | 2016-12-12 | 2018-06-21 | 日本電産株式会社 | ステータユニット、モータ、およびステータユニットの製造方法 |
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- 2022-05-10 JP JP2023529677A patent/JPWO2022264712A1/ja active Pending
- 2022-05-10 WO PCT/JP2022/019798 patent/WO2022264712A1/ja active Application Filing
- 2022-05-10 EP EP22824706.0A patent/EP4358366A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08196065A (ja) * | 1995-01-12 | 1996-07-30 | Matsushita Electric Ind Co Ltd | モールドモータ金型 |
JP2018098870A (ja) * | 2016-12-12 | 2018-06-21 | 日本電産株式会社 | ステータユニット、モータ、およびステータユニットの製造方法 |
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CN117501586A (zh) | 2024-02-02 |
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