WO2014163293A1 - Motor with simple assembling sensor magnet - Google Patents

Motor with simple assembling sensor magnet Download PDF

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Publication number
WO2014163293A1
WO2014163293A1 PCT/KR2014/001246 KR2014001246W WO2014163293A1 WO 2014163293 A1 WO2014163293 A1 WO 2014163293A1 KR 2014001246 W KR2014001246 W KR 2014001246W WO 2014163293 A1 WO2014163293 A1 WO 2014163293A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
unit
combined
rotor
sensor magnet
Prior art date
Application number
PCT/KR2014/001246
Other languages
French (fr)
Inventor
Jeong Cheol Jang
Ji Min Lee
Gyeong Sik Yang
Original Assignee
New Motech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Motech Co., Ltd. filed Critical New Motech Co., Ltd.
Priority to CN201480013928.1A priority Critical patent/CN105247766B/en
Publication of WO2014163293A1 publication Critical patent/WO2014163293A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors

Definitions

  • the present invention relates to a motor. More specifically, the present invention relates to a motor, which is improved in a rotation characteristic while having a stricture easy to assemble a sensor magnet.
  • a brushless motor does not have a stator and includes a hall sensor for detecting rotation of a rotor.
  • the DD motor has a circuit for detecting a rotating magnetic field generated by a rotor magnet included in the rotor which rotates.
  • a structure in which a hall sensor for detecting the rotating magnetic field is fixedly installed at a stator in the form of a sensor cover is disclosed in Korea Patent No. 10-1103989.
  • a motor applied to a small washer it is difficult to find a place for installing a hall sensor around a rotor.
  • a motor having a structure of installing a magnetic sensor at an end of a shaft rotating together with a rotor and capable of detecting a rotating speed of the rotor through a rotating magnetic field of the magnetic sensor is proposed in Korea Patent No. 10-1103925.
  • an assembly structure of the sensor magnet proposed in this patent needs to process the shape of one end of the shaft in a somewhat complicated manner and, furthermore, should form a rectangular hole at the center portion of the sensor magnet, the processing procedure is complicated and difficult, and this leads to increase of manufacturing cost.
  • the inventors of the present invention propose a motor applying a sensor magnet of a new structure having a simple assembly structure and an excellent rotating characteristic.
  • An object of the present invention is to provide a motor having a sensor magnet easy to assemble.
  • Another object of the present invention is to provide a motor of an excellent rotating characteristic.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a screw groove on an inner surface thereof is formed at the mold unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a latching unit formed inside thereof is formed at the mold unit, and a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and combined with a bolt inside thereof is formed at the mold unit, and a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a screw hole inside thereof is formed at the mold unit, and a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a polygonal depression inside thereof is formed at the mold unit, and a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
  • an adhesive may be applied inside the protrusion unit.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet combined with a projection unit formed at one end of the shaft and having a hole formed at a center portion, in which an adhesive is applied in the hole of the sensor magnet.
  • the motor may further comprise a mold unit wrapping around the sensor magnet.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a screw groove is formed along an inner periphery of the inner space unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a latching unit is formed at a portion of an inner periphery of the inner space unit, and a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a bolt is combined at a center portion of the inner space unit, and a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a screw hole is formed at a center portion of the inner space unit, and a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
  • a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a polygonal depression is formed at a center portion of the inner space unit, and a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
  • At least one or more openings are formed on an outer periphery of the mold unit, and the sensor magnet may be exposed through the openings.
  • the present invention has an effect of providing a motor having a sensor magnet easy to assemble and an excellent rotating characteristic.
  • FIG. 1 is a perspective view showing a partially exploded motor according to a first embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a motor taken along the line A-A'in FIG. 1.
  • FIG. 3 is a perspective view showing a partially exploded motor according to a second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view showing a partially exploded motor according to a third embodiment of the present invention.
  • FIG. 5 is a perspective view showing a partially exploded motor according to a fourth embodiment of the present invention.
  • FIG. 6 is a perspective view showing a partially exploded motor according to a fifth embodiment of the present invention.
  • FIG. 7 is a perspective view showing a partially exploded motor according to a sixth embodiment of the present invention.
  • FIG. 8 is a perspective view showing the motor according to the sixth embodiment of the present invention.
  • FIG. 9 is a cross-sectional view showing a partially exploded motor according to a seventh embodiment of the present invention.
  • FIG. 1 is a perspective view showing a partially exploded motor 100 according to a first embodiment of the present invention
  • FIG. 2 is a cross-sectional view of a motor taken along the line A-A'in FIG. 1.
  • the motor 100 includes a shaft 130, a mold unit 110 combined at one end of the shaft and including a sensor magnet 120, and a rotator 140 combined in the middle of the shaft 130.
  • the motor 100 of the present invention apparently further includes a stator (not shown) installed around the rotor 140 and wrapped with a coil, a motor housing (not shown) and the like, the stator, the motor housing and the like will be omitted in describing the specification.
  • the rotor 140 includes a plurality of rotor magnets 145 inside thereof, and the rotor 140 rotates influenced by magnetic flux generated by the stator (not shown).
  • the shaft 130 combined with the rotor 140 rotates by the rotation of the rotor 140.
  • the mold unit 110 including the sensor magnet 120 is combined at one end of the shaft 130, and a load (not shown) is combined at the other end of the shaft 130.
  • the load may be a washing tub in the case of a washer or an apparatus which needs rotation.
  • the sensor magnet 120 is combined at one end of the shaft 130 and rotates together with the shaft.
  • a hall sensor for detecting rotation of a motor is installed at a portion quite close to the rotor magnet 145, and when the hall sensor cannot be installed at a position close to the rotor magnet due to a structural reason, the motor of the present invention installs the sensor magnet 120 at an end of the shaft 140 to rotate the sensor magnet 120 at a speed the same as that of the rotor 140 and then installs the hall sensor at a position close to the sensor magnet 120 to detect a rotating speed of the motor.
  • the sensor magnet 120 is positioned inside the mold unit 110. That is, the mold unit 110 includes the sensor magnet 120, and the mold unit 110 has a shape for being combined at one end of the shaft 130.
  • the mold unit 110 is manufactured through injection molding after positioning the sensor magnet 120 in an insert injection mold.
  • At least one or more, preferably two or more, openings 111 are formed on the outer periphery of the mold unit 110, and the sensor magnet 120 is exposed to be seen from outside through the openings 111.
  • the openings 111 are preferably have an axial shape. Since the sensor magnet 120 is exposed to outside through the openings 111, efficiency of detection may be enhanced when the hall sensor detects magnetic flux, and it may function as a handle for preventing slip when the mold unit 110 is combined at one end of the shaft 130.
  • the openings 111 may be formed by injection molding after positioning at least one or more pins for fixing the sensor magnet 120 around the sensor magnet 120 in a mold when the sensor magnet 120 is insert injected.
  • a protrusion unit 112 of a shape wrapping one end of the shaft 130 is formed at the mold unit 110 toward the shaft.
  • a screw groove 113 is formed on the inner surface of the protrusion unit 112 and combined with a screw tab 135 formed at one end of the shaft 130.
  • the screw tab 135 has a shape of a male screw
  • the screw groove 113 has a shape of a female screw.
  • the mold unit 110 including the sensor magnet 120 is configured to be conveniently combined with one end of the shaft 130 with a hand.
  • FIG. 3 is a perspective view showing a partially exploded motor 200 according to a second embodiment of the present invention.
  • the motor 200 includes a sensor magnet 210, a mold unit 220, a shaft 230 and a rotor 240 having a rotor magnet 245.
  • the sensor magnet 220 is wrapped by the mold unit 210 to be combined at one end of the shaft 230.
  • the mold unit 210 is preferably formed by injection molding while the sensor magnet 220 is positioned in an insert injection mold as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 211 are formed on the outer periphery of the mold unit 210, and the sensor magnet 220 is exposed to be seen from outside through the openings 211.
  • the openings 211 preferably have an axial shape.
  • a protrusion unit 212 for wrapping an end portion of the shaft 230 is formed at the mold unit 210 toward the shaft.
  • a latching unit 213 is formed inside the protrusion unit 212.
  • the shape of the latching unit 213 corresponds to the shape of the cut portion 231 formed at the end portion of the shaft 230. That is, if the end portion of the shaft 230 is inserted into the protrusion unit 212, the cut portion 231 is firmly combined with the latching unit 213. Accordingly, it prevents slipped rotation of the sensor magnet 220 when the shaft 230 rotates.
  • the mold unit 210 including the sensor magnet 220 is fixed to the shaft 230 by applying an adhesive at the contact point between the end portion of the shaft 230 and the protrusion unit 212 when the end portion of the shaft 230 is combined with the protrusion unit 212.
  • an adhesive such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive.
  • a hole 214 is formed at the center portion of the mold unit 210, and a hole (not shown) is also formed at the center portion of the end portion of the shaft 230, and then the mold unit 210 may be combined with the shaft 230 by engaging a bolt (not shown) with the hole 214.
  • FIG. 4 is a cross-sectional view showing a partially exploded motor 300 according to a third embodiment of the present invention.
  • the motor 300 is configured to include a mold unit 310, a sensor magnet 320, a shaft 330 and a rotor 340 having a rotor magnet 345.
  • the sensor magnet 320 is wrapped by the mold unit 310 to be combined at one end of the shaft 330.
  • the mold unit 310 is preferably formed by injection molding while the sensor magnet 320 is positioned in an insert injection mold as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 311 are formed on the outer periphery of the mold unit 310, and the sensor magnet 320 is exposed to be seen from outside through the openings 311.
  • the openings 311 preferably have an axial shape.
  • a protrusion unit 312 for wrapping an end portion of the shaft 330 is formed at the mold unit 310 toward the shaft.
  • a bolt 315 is combined inside the protrusion unit 312 at the center portion of the mold unit 310.
  • the bolt 315 is positioned at the center portion of the mold unit 310 by forming the mold unit 310 while the bolt 315 is positioned in the insert injection mold together with the sensor magnet 320.
  • the bolt 315 is combined with a screw hole 335 formed at the center portion of an end portion of the shaft 330. Since the bolt 315 is formed in a shape of a male screw and the screw hole 335 is formed in a shape of a female screw, it is preferable to form a screw connection between the bolt 315 and the screw hole 335. However, they do not necessarily need to form a screw connection. That is, the bolt 315 and the screw hole 335 may be simply combined and fixed to each other using an adhesive without necessarily forming male and female screw shapes.
  • the sensor magnet is combined at an end of the shaft 330 by the connection of the bolt 315. In addition to the connection of the bolt 315, an adhesive may be used to further strongly fix the mold unit 310 including the sensor magnetic 320 to the shaft 330.
  • FIG. 5 is a perspective view showing a partially exploded motor 400 according to a fourth embodiment of the present invention.
  • the motor 400 is configured to include a mold unit 410, a sensor magnet 420, a shaft 430 and a rotor 440 having a rotor magnet 445.
  • the sensor magnet 420 is wrapped by the mold unit 410 to be combined at one end of the shaft 430.
  • the mold unit 410 is preferably formed by injection molding while the sensor magnet 420 is positioned in an insert injection mold as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 411 are formed on the outer periphery of the mold unit 410, and the sensor magnet 420 is exposed to be seen from outside through the openings 411.
  • the openings 411 preferably have an axial shape.
  • a protrusion unit 412 for wrapping one end of the shaft 430 is formed at the mold unit 410 toward the shaft.
  • a screw hole 413 is formed inside the protrusion unit 412 at the center portion of the mold unit 410.
  • the inner side of the screw hole 413 is formed in a shape of a female screw, and the shape of the screw hole 413 may be formed by insert injection when the mold unit 410 is formed. Or, the screw hole 413 may be positioned at the center portion of the mold unit 410 by forming the screw hole 413 together with the mold unit 410 while a separate nut is positioned in an insert injection mold together with the sensor magnet 420.
  • the screw hole 413 is combined with a screw unit 435 having a shape of a male screw formed to be protruded at the center portion of an end portion of the shaft 430.
  • the sensor magnet 420 is combined at the end of the shaft 430 by combining the screw unit 435 with the screw hole 413.
  • the mold unit 410 including the sensor magnet 420 may be further strongly fixed to the shaft 430 by applying an adhesive at an inner portion of the protrusion unit 412 contacting with the end portion of the shaft 430.
  • a variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive.
  • FIG. 6 is a perspective view showing a partially exploded motor 500 according to a fifth embodiment of the present invention.
  • the motor 500 is configured to include a mold unit 510, a sensor magnet 520, a shaft 530 and a rotor 540 having a rotor magnet 545.
  • the sensor magnet 520 is wrapped by the mold unit 510 to be combined at one end of the shaft 530.
  • the mold unit 510 is preferably formed by injection molding while the sensor magnet 520 is positioned in an insert injection mold as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 511 are formed on the outer periphery of the mold unit 510, and the sensor magnet 520 is exposed to be seen from outside through the openings 511.
  • the openings 511 preferably have an axial shape.
  • a protrusion unit 512 for wrapping an end portion of the shaft 530 is formed at the mold unit 510 toward the shaft.
  • a polygonal depression 513 is formed inside the protrusion unit 512 at the center portion of the mold unit 510.
  • the polygonal depression 513 is shown as a square shape in FIG. 6, it is not necessarily limited to the square shape, and a polygonal shape such as a triangular shape, a pentagonal shape, a hexagonal shape or the like may be applied.
  • the polygonal depression 513 may be manufactured in one piece together with the mold unit 510 through resin molding, or a metal member having a polygonal hole may be formed together inside the mold unit 510 by insert injection when the mold unit 510 is formed.
  • the polygonal depression 513 is combined with a polygonal projection unit 535 formed at the center portion of an end portion of the shaft 530.
  • the sensor magnet 520 is combined at the end of the shaft 530 by combining the polygonal projection unit 535 with the polygonal depression 513.
  • the mold unit 510 including the sensor magnet 520 may be further strongly fixed to the shaft 530 by applying an adhesive at an inner portion of the protrusion unit 512 contacting with the end portion of the shaft 530 and at the contact point between the polygonal projection unit 535 and the polygonal depression 513.
  • a variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive.
  • FIG. 7 is a perspective view showing a partially exploded motor 600 according to a sixth embodiment of the present invention
  • FIG. 8 is a perspective view showing a state of forming a mold unit 610 at a sensor magnet 620 in the motor 600 according to the sixth embodiment of the present invention.
  • the motor 600 is configured to include a sensor magnet 620, a shaft 630 and a rotor 640 having a rotor magnet 645.
  • a hole 625 is formed at the center portion of the sensor magnet 620, and a projection unit 635 inserted into the hole 625 is formed to be projected at one end of the shaft 630.
  • the sensor magnet 620 is fixed at one end of the shaft 630 using an adhesive.
  • a variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive. In this state, that is, while the sensor magnet 620 is combined with the projection unit 635 of the shaft 630, they are positioned in an insert injection mold, and then the mold unit 610 is formed by injection molding as shown in FIG. 8.
  • the mold unit 610 is preferably formed by injection molding while the sensor magnet 620 is positioned in an insert injection mold while being combined with the shaft 630 as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 611 are formed on the outer periphery of the mold unit 610, and the sensor magnet 620 is exposed to be seen from outside through the openings 611.
  • the openings 611 preferably have an axial shape.
  • FIG. 9 is a cross-sectional view showing a partially exploded motor 700 according to a seventh embodiment of the present invention.
  • the motor 700 includes a mold unit 710, a sensor magnet 720, a shaft 730 and a rotor 740 having a rotor magnet 745.
  • the sensor magnet 720 is wrapped by the mold unit 710 to be combined at one end of the shaft 730.
  • the mold unit 710 is preferably formed by injection molding while the sensor magnet 720 is positioned in an insert injection mold as described above in the first embodiment.
  • At least one or more, preferably two or more, openings 711 are formed on the outer periphery of the mold unit 710, and the sensor magnet 720 is exposed to be seen from outside through the openings 711.
  • the openings 711 preferably have an axial shape.
  • a screw tab 735 is formed at an end portion of the shaft 730 where the sensor magnet 720 is combined.
  • the screw tab 735 has a shape of a male screw.
  • the screw tab 735 is positioned in an inner space unit 722 formed inside the mold unit 710, and a screw groove 723 corresponding to the screw tab 735 is formed around the inner space unit 722.
  • the screw groove 723 preferably has a shape of a female screw.
  • the screw groove 723 and the screw tab 735 may have a flat shape without any pattern. At this point, the screw groove 723 and the screw tab 735 are fixed to each other using an adhesive.
  • the screw groove 113 is formed on the inner surface of the protrusion unit 112 of the mold unit 110.
  • the screw groove 723 is formed on the inner surface of the mold unit 710. That is, in the case of the seventh embodiment, the mold unit 710 does not have a portion protruded toward the shaft 730 and contrarily has a hollow shape toward the inside of the mold unit 710.
  • the form of omitting a protrusion unit of the mold unit toward the shaft may be also applied in the second to sixth embodiments in the same manner.
  • the form of omitting a protrusion unit corresponds to the eighth to eleventh embodiments.

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  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

A motor having a rotor combined with a shaft and a stator installed around the rotor according to the present invention further includes a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a screw groove on an inner surface thereof is formed at the mold unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.

Description

MOTOR WITH SIMPLE ASSEMBLING SENSOR MAGNET
The present invention relates to a motor. More specifically, the present invention relates to a motor, which is improved in a rotation characteristic while having a stricture easy to assemble a sensor magnet.
Generally, a brushless motor does not have a stator and includes a hall sensor for detecting rotation of a rotor. Particularly, in the case of a direct drive (DD) motor used in a drum washer or the like, the DD motor has a circuit for detecting a rotating magnetic field generated by a rotor magnet included in the rotor which rotates.
A structure in which a hall sensor for detecting the rotating magnetic field is fixedly installed at a stator in the form of a sensor cover is disclosed in Korea Patent No. 10-1103989. However, in the case of a motor applied to a small washer, it is difficult to find a place for installing a hall sensor around a rotor.
Therefore, a motor having a structure of installing a magnetic sensor at an end of a shaft rotating together with a rotor and capable of detecting a rotating speed of the rotor through a rotating magnetic field of the magnetic sensor is proposed in Korea Patent No. 10-1103925. However, since an assembly structure of the sensor magnet proposed in this patent needs to process the shape of one end of the shaft in a somewhat complicated manner and, furthermore, should form a rectangular hole at the center portion of the sensor magnet, the processing procedure is complicated and difficult, and this leads to increase of manufacturing cost.
Therefore, the inventors of the present invention propose a motor applying a sensor magnet of a new structure having a simple assembly structure and an excellent rotating characteristic.
An object of the present invention is to provide a motor having a sensor magnet easy to assemble.
Another object of the present invention is to provide a motor of an excellent rotating characteristic.
The objects described above and other inherent objects of the present invention may be easily accomplished by the present invention described below.
According to a first embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a screw groove on an inner surface thereof is formed at the mold unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.
According to a second embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a latching unit formed inside thereof is formed at the mold unit, and a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
According to a third embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and combined with a bolt inside thereof is formed at the mold unit, and a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
According to a fourth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a screw hole inside thereof is formed at the mold unit, and a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
According to a fifth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which a protrusion unit protruded toward the shaft and having a polygonal depression inside thereof is formed at the mold unit, and a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
In the present invention, an adhesive may be applied inside the protrusion unit.
According to a sixth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet combined with a projection unit formed at one end of the shaft and having a hole formed at a center portion, in which an adhesive is applied in the hole of the sensor magnet.
In the sixth embodiment of the present invention, the motor may further comprise a mold unit wrapping around the sensor magnet.
According to a seventh embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a screw groove is formed along an inner periphery of the inner space unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.
According to an eighth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a latching unit is formed at a portion of an inner periphery of the inner space unit, and a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
According to a ninth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a bolt is combined at a center portion of the inner space unit, and a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
According to a tenth embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a screw hole is formed at a center portion of the inner space unit, and a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
According to an eleventh embodiment of the present invention, a motor having a rotor combined with a shaft and a stator installed around the rotor further comprises a sensor magnet having a mold unit combined at one end of the shaft, in which an inner space unit is formed inside the mold unit, a polygonal depression is formed at a center portion of the inner space unit, and a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
In the present invention, at least one or more openings are formed on an outer periphery of the mold unit, and the sensor magnet may be exposed through the openings.
The present invention has an effect of providing a motor having a sensor magnet easy to assemble and an excellent rotating characteristic.
FIG. 1 is a perspective view showing a partially exploded motor according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a motor taken along the line A-A'in FIG. 1.
FIG. 3 is a perspective view showing a partially exploded motor according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a partially exploded motor according to a third embodiment of the present invention.
FIG. 5 is a perspective view showing a partially exploded motor according to a fourth embodiment of the present invention.
FIG. 6 is a perspective view showing a partially exploded motor according to a fifth embodiment of the present invention.
FIG. 7 is a perspective view showing a partially exploded motor according to a sixth embodiment of the present invention.
FIG. 8 is a perspective view showing the motor according to the sixth embodiment of the present invention.
FIG. 9 is a cross-sectional view showing a partially exploded motor according to a seventh embodiment of the present invention.
The preferred embodiments of the present invention will be hereafter described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view showing a partially exploded motor 100 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a motor taken along the line A-A'in FIG. 1.
As shown in FIGs. 1 and 2, the motor 100 according to a first embodiment of the present invention includes a shaft 130, a mold unit 110 combined at one end of the shaft and including a sensor magnet 120, and a rotator 140 combined in the middle of the shaft 130.
Although the motor 100 of the present invention apparently further includes a stator (not shown) installed around the rotor 140 and wrapped with a coil, a motor housing (not shown) and the like, the stator, the motor housing and the like will be omitted in describing the specification.
The rotor 140 includes a plurality of rotor magnets 145 inside thereof, and the rotor 140 rotates influenced by magnetic flux generated by the stator (not shown). The shaft 130 combined with the rotor 140 rotates by the rotation of the rotor 140. The mold unit 110 including the sensor magnet 120 is combined at one end of the shaft 130, and a load (not shown) is combined at the other end of the shaft 130. The load may be a washing tub in the case of a washer or an apparatus which needs rotation.
The sensor magnet 120 is combined at one end of the shaft 130 and rotates together with the shaft. Generally, a hall sensor for detecting rotation of a motor is installed at a portion quite close to the rotor magnet 145, and when the hall sensor cannot be installed at a position close to the rotor magnet due to a structural reason, the motor of the present invention installs the sensor magnet 120 at an end of the shaft 140 to rotate the sensor magnet 120 at a speed the same as that of the rotor 140 and then installs the hall sensor at a position close to the sensor magnet 120 to detect a rotating speed of the motor.
In order to combine the sensor magnet 120 at one end of the shaft 130, the sensor magnet 120 is positioned inside the mold unit 110. That is, the mold unit 110 includes the sensor magnet 120, and the mold unit 110 has a shape for being combined at one end of the shaft 130. Preferably, the mold unit 110 is manufactured through injection molding after positioning the sensor magnet 120 in an insert injection mold.
At least one or more, preferably two or more, openings 111 are formed on the outer periphery of the mold unit 110, and the sensor magnet 120 is exposed to be seen from outside through the openings 111. The openings 111 are preferably have an axial shape. Since the sensor magnet 120 is exposed to outside through the openings 111, efficiency of detection may be enhanced when the hall sensor detects magnetic flux, and it may function as a handle for preventing slip when the mold unit 110 is combined at one end of the shaft 130.
The openings 111 may be formed by injection molding after positioning at least one or more pins for fixing the sensor magnet 120 around the sensor magnet 120 in a mold when the sensor magnet 120 is insert injected.
A protrusion unit 112 of a shape wrapping one end of the shaft 130 is formed at the mold unit 110 toward the shaft. A screw groove 113 is formed on the inner surface of the protrusion unit 112 and combined with a screw tab 135 formed at one end of the shaft 130. Preferably, the screw tab 135 has a shape of a male screw, and the screw groove 113 has a shape of a female screw. Like this, the mold unit 110 including the sensor magnet 120 is configured to be conveniently combined with one end of the shaft 130 with a hand.
FIG. 3 is a perspective view showing a partially exploded motor 200 according to a second embodiment of the present invention.
Referring to FIG. 3, the motor 200 according to a second embodiment of the present invention includes a sensor magnet 210, a mold unit 220, a shaft 230 and a rotor 240 having a rotor magnet 245.
The sensor magnet 220 is wrapped by the mold unit 210 to be combined at one end of the shaft 230. The mold unit 210 is preferably formed by injection molding while the sensor magnet 220 is positioned in an insert injection mold as described above in the first embodiment. At least one or more, preferably two or more, openings 211 are formed on the outer periphery of the mold unit 210, and the sensor magnet 220 is exposed to be seen from outside through the openings 211. The openings 211 preferably have an axial shape.
A protrusion unit 212 for wrapping an end portion of the shaft 230 is formed at the mold unit 210 toward the shaft. A latching unit 213 is formed inside the protrusion unit 212. The shape of the latching unit 213 corresponds to the shape of the cut portion 231 formed at the end portion of the shaft 230. That is, if the end portion of the shaft 230 is inserted into the protrusion unit 212, the cut portion 231 is firmly combined with the latching unit 213. Accordingly, it prevents slipped rotation of the sensor magnet 220 when the shaft 230 rotates.
In order to firmly combine the mold unit 210 at an end portion of the shaft 230, the mold unit 210 including the sensor magnet 220 is fixed to the shaft 230 by applying an adhesive at the contact point between the end portion of the shaft 230 and the protrusion unit 212 when the end portion of the shaft 230 is combined with the protrusion unit 212. A variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive. In parallel with or in separation from using an adhesive, a hole 214 is formed at the center portion of the mold unit 210, and a hole (not shown) is also formed at the center portion of the end portion of the shaft 230, and then the mold unit 210 may be combined with the shaft 230 by engaging a bolt (not shown) with the hole 214.
FIG. 4 is a cross-sectional view showing a partially exploded motor 300 according to a third embodiment of the present invention.
As shown in FIG. 4, the motor 300 according to a third embodiment of the present invention is configured to include a mold unit 310, a sensor magnet 320, a shaft 330 and a rotor 340 having a rotor magnet 345.
The sensor magnet 320 is wrapped by the mold unit 310 to be combined at one end of the shaft 330. The mold unit 310 is preferably formed by injection molding while the sensor magnet 320 is positioned in an insert injection mold as described above in the first embodiment. At least one or more, preferably two or more, openings 311 are formed on the outer periphery of the mold unit 310, and the sensor magnet 320 is exposed to be seen from outside through the openings 311. The openings 311 preferably have an axial shape.
A protrusion unit 312 for wrapping an end portion of the shaft 330 is formed at the mold unit 310 toward the shaft. A bolt 315 is combined inside the protrusion unit 312 at the center portion of the mold unit 310. The bolt 315 is positioned at the center portion of the mold unit 310 by forming the mold unit 310 while the bolt 315 is positioned in the insert injection mold together with the sensor magnet 320.
The bolt 315 is combined with a screw hole 335 formed at the center portion of an end portion of the shaft 330. Since the bolt 315 is formed in a shape of a male screw and the screw hole 335 is formed in a shape of a female screw, it is preferable to form a screw connection between the bolt 315 and the screw hole 335. However, they do not necessarily need to form a screw connection. That is, the bolt 315 and the screw hole 335 may be simply combined and fixed to each other using an adhesive without necessarily forming male and female screw shapes. The sensor magnet is combined at an end of the shaft 330 by the connection of the bolt 315. In addition to the connection of the bolt 315, an adhesive may be used to further strongly fix the mold unit 310 including the sensor magnetic 320 to the shaft 330.
FIG. 5 is a perspective view showing a partially exploded motor 400 according to a fourth embodiment of the present invention.
Referring to FIG. 5, the motor 400 according to a fourth embodiment of the present invention is configured to include a mold unit 410, a sensor magnet 420, a shaft 430 and a rotor 440 having a rotor magnet 445.
The sensor magnet 420 is wrapped by the mold unit 410 to be combined at one end of the shaft 430. The mold unit 410 is preferably formed by injection molding while the sensor magnet 420 is positioned in an insert injection mold as described above in the first embodiment. At least one or more, preferably two or more, openings 411 are formed on the outer periphery of the mold unit 410, and the sensor magnet 420 is exposed to be seen from outside through the openings 411. The openings 411 preferably have an axial shape.
A protrusion unit 412 for wrapping one end of the shaft 430 is formed at the mold unit 410 toward the shaft. A screw hole 413 is formed inside the protrusion unit 412 at the center portion of the mold unit 410. The inner side of the screw hole 413 is formed in a shape of a female screw, and the shape of the screw hole 413 may be formed by insert injection when the mold unit 410 is formed. Or, the screw hole 413 may be positioned at the center portion of the mold unit 410 by forming the screw hole 413 together with the mold unit 410 while a separate nut is positioned in an insert injection mold together with the sensor magnet 420.
The screw hole 413 is combined with a screw unit 435 having a shape of a male screw formed to be protruded at the center portion of an end portion of the shaft 430. The sensor magnet 420 is combined at the end of the shaft 430 by combining the screw unit 435 with the screw hole 413. In order to further firmly combine the sensor magnet 420, the mold unit 410 including the sensor magnet 420 may be further strongly fixed to the shaft 430 by applying an adhesive at an inner portion of the protrusion unit 412 contacting with the end portion of the shaft 430. A variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive.
FIG. 6 is a perspective view showing a partially exploded motor 500 according to a fifth embodiment of the present invention.
As shown in FIG. 6, the motor 500 according to a fifth embodiment of the present invention is configured to include a mold unit 510, a sensor magnet 520, a shaft 530 and a rotor 540 having a rotor magnet 545.
The sensor magnet 520 is wrapped by the mold unit 510 to be combined at one end of the shaft 530. The mold unit 510 is preferably formed by injection molding while the sensor magnet 520 is positioned in an insert injection mold as described above in the first embodiment. At least one or more, preferably two or more, openings 511 are formed on the outer periphery of the mold unit 510, and the sensor magnet 520 is exposed to be seen from outside through the openings 511. The openings 511 preferably have an axial shape.
A protrusion unit 512 for wrapping an end portion of the shaft 530 is formed at the mold unit 510 toward the shaft. A polygonal depression 513 is formed inside the protrusion unit 512 at the center portion of the mold unit 510. Although the polygonal depression 513 is shown as a square shape in FIG. 6, it is not necessarily limited to the square shape, and a polygonal shape such as a triangular shape, a pentagonal shape, a hexagonal shape or the like may be applied. The polygonal depression 513 may be manufactured in one piece together with the mold unit 510 through resin molding, or a metal member having a polygonal hole may be formed together inside the mold unit 510 by insert injection when the mold unit 510 is formed.
The polygonal depression 513 is combined with a polygonal projection unit 535 formed at the center portion of an end portion of the shaft 530. The sensor magnet 520 is combined at the end of the shaft 530 by combining the polygonal projection unit 535 with the polygonal depression 513. In order to further firmly combine the sensor magnet 520, the mold unit 510 including the sensor magnet 520 may be further strongly fixed to the shaft 530 by applying an adhesive at an inner portion of the protrusion unit 512 contacting with the end portion of the shaft 530 and at the contact point between the polygonal projection unit 535 and the polygonal depression 513. A variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive.
FIG. 7 is a perspective view showing a partially exploded motor 600 according to a sixth embodiment of the present invention, and FIG. 8 is a perspective view showing a state of forming a mold unit 610 at a sensor magnet 620 in the motor 600 according to the sixth embodiment of the present invention.
Referring to FIG. 7 first, the motor 600 according to a sixth embodiment of the present invention is configured to include a sensor magnet 620, a shaft 630 and a rotor 640 having a rotor magnet 645.
A hole 625 is formed at the center portion of the sensor magnet 620, and a projection unit 635 inserted into the hole 625 is formed to be projected at one end of the shaft 630. When the projection unit 635 is inserted into the hole 625 of the sensor magnet 620, the sensor magnet 620 is fixed at one end of the shaft 630 using an adhesive. A variety of adhesives such as a UV curable adhesive, a thermosetting adhesive, a putty type adhesive and the like may be used as the adhesive. In this state, that is, while the sensor magnet 620 is combined with the projection unit 635 of the shaft 630, they are positioned in an insert injection mold, and then the mold unit 610 is formed by injection molding as shown in FIG. 8.
Referring to FIG. 8, the mold unit 610 is preferably formed by injection molding while the sensor magnet 620 is positioned in an insert injection mold while being combined with the shaft 630 as described above in the first embodiment. At least one or more, preferably two or more, openings 611 are formed on the outer periphery of the mold unit 610, and the sensor magnet 620 is exposed to be seen from outside through the openings 611. The openings 611 preferably have an axial shape.
FIG. 9 is a cross-sectional view showing a partially exploded motor 700 according to a seventh embodiment of the present invention.
As shown in FIG. 9, the motor 700 according to a seventh embodiment of the present invention includes a mold unit 710, a sensor magnet 720, a shaft 730 and a rotor 740 having a rotor magnet 745.
The sensor magnet 720 is wrapped by the mold unit 710 to be combined at one end of the shaft 730. The mold unit 710 is preferably formed by injection molding while the sensor magnet 720 is positioned in an insert injection mold as described above in the first embodiment. At least one or more, preferably two or more, openings 711 are formed on the outer periphery of the mold unit 710, and the sensor magnet 720 is exposed to be seen from outside through the openings 711. The openings 711 preferably have an axial shape.
A screw tab 735 is formed at an end portion of the shaft 730 where the sensor magnet 720 is combined. Preferably, the screw tab 735 has a shape of a male screw. The screw tab 735 is positioned in an inner space unit 722 formed inside the mold unit 710, and a screw groove 723 corresponding to the screw tab 735 is formed around the inner space unit 722. The screw groove 723 preferably has a shape of a female screw. On the other hand, the screw groove 723 and the screw tab 735 may have a flat shape without any pattern. At this point, the screw groove 723 and the screw tab 735 are fixed to each other using an adhesive.
In the case of the motor 100 according to a first embodiment of the present invention, the screw groove 113 is formed on the inner surface of the protrusion unit 112 of the mold unit 110. However, in the case of the motor 700 according to a seventh embodiment of the present invention, the screw groove 723 is formed on the inner surface of the mold unit 710. That is, in the case of the seventh embodiment, the mold unit 710 does not have a portion protruded toward the shaft 730 and contrarily has a hollow shape toward the inside of the mold unit 710. Like this, the form of omitting a protrusion unit of the mold unit toward the shaft may be also applied in the second to sixth embodiments in the same manner. The form of omitting a protrusion unit corresponds to the eighth to eleventh embodiments.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

Claims (14)

  1. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    a protrusion unit protruded toward the shaft and having a screw groove on an inner surface thereof is formed at the mold unit, and a screw tab combined with the screw groove is formed at the one end of the shaft.
  2. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    a protrusion unit protruded toward the shaft and having a latching unit formed inside thereof is formed at the mold unit, and a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
  3. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    a protrusion unit protruded toward the shaft and combined with a bolt inside thereof is formed at the mold unit, and a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
  4. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    a protrusion unit protruded toward the shaft and having a screw hole inside thereof is formed at the mold unit, and a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
  5. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    a protrusion unit protruded toward the shaft and having a polygonal depression inside thereof is formed at the mold unit, and a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
  6. The motor according to any one of claims 1 to 5, wherein an adhesive is applied inside the protrusion unit.
  7. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet combined with a projection unit formed at one end of the shaft and having a hole formed at a center portion, wherein
    an adhesive is applied in the hole of the sensor magnet.
  8. The motor according to claim 7, further comprising a mold unit wrapping around the sensor magnet.
  9. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    an inner space unit is formed inside the mold unit,
    a screw groove is formed along an inner periphery of the inner space unit, and a
    screw tab combined with the screw groove is formed at the one end of the shaft.
  10. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    an inner space unit is formed inside the mold unit,
    a latching unit is formed at a portion of an inner periphery of the inner space unit, and
    a cut portion cut into a shape corresponding to a shape of the latching unit is formed at the one end of the shaft.
  11. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    an inner space unit is formed inside the mold unit,
    a bolt is combined at a center portion of the inner space unit, and
    a screw hole corresponding to a shape of the bolt is formed at the one end of the shaft.
  12. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    an inner space unit is formed inside the mold unit,
    a screw hole is formed at a center portion of the inner space unit, and
    a screw unit corresponding to a shape of the screw hole is formed to be projected at the one end of the shaft.
  13. A motor having a rotor combined with a shaft and a stator installed around the rotor, further comprising a sensor magnet having a mold unit combined at one end of the shaft, wherein
    an inner space unit is formed inside the mold unit,
    a polygonal depression is formed at a center portion of the inner space unit, and
    a polygonal projection unit corresponding to a shape of the polygonal depression is formed to be projected at the one end of the shaft.
  14. The motor according to any one of claims 1 to 5 and 8 to 13, wherein at least one or more openings are formed on an outer periphery of the mold unit, and the sensor magnet is exposed through the openings.
PCT/KR2014/001246 2013-04-01 2014-02-17 Motor with simple assembling sensor magnet WO2014163293A1 (en)

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Application Number Priority Date Filing Date Title
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KR1020130035199A KR101604889B1 (en) 2013-04-01 2013-04-01 Motor with Simple Assembling Sensor Magnet
KR10-2013-0035199 2013-04-01

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JP2017123731A (en) * 2016-01-07 2017-07-13 日本電産サンキョー株式会社 motor
CN107431417A (en) * 2015-04-02 2017-12-01 标立电机有限公司 magnetic sensing device
JP2018046660A (en) * 2016-09-14 2018-03-22 アスモ株式会社 Motor unit
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JP6882112B2 (en) * 2017-08-04 2021-06-02 マブチモーター株式会社 Sensor magnets and motors
KR102337453B1 (en) * 2019-12-31 2021-12-09 주식회사 코렌스이엠 DC motor for minimizing exposure of magnet for sensing RPM
KR20220101345A (en) * 2021-01-11 2022-07-19 엘지이노텍 주식회사 Motor
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JP2017123731A (en) * 2016-01-07 2017-07-13 日本電産サンキョー株式会社 motor
JP2018046660A (en) * 2016-09-14 2018-03-22 アスモ株式会社 Motor unit
DE102017121215A1 (en) * 2017-09-13 2019-03-14 Valeo Systèmes d'Essuyage Brushless electric motor
DE102022004807A1 (en) 2022-01-27 2023-07-27 Sew-Eurodrive Gmbh & Co Kg drive system
WO2023143819A1 (en) 2022-01-27 2023-08-03 Sew-Eurodrive Gmbh & Co. Kg Drive system

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KR20140119983A (en) 2014-10-13
CN105247766A (en) 2016-01-13
CN105247766B (en) 2018-12-14
KR101604889B1 (en) 2016-03-21

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