KR20070092826A - Pan-cake type brushless dc motor - Google Patents

Pan-cake type brushless dc motor Download PDF

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Publication number
KR20070092826A
KR20070092826A KR1020060022107A KR20060022107A KR20070092826A KR 20070092826 A KR20070092826 A KR 20070092826A KR 1020060022107 A KR1020060022107 A KR 1020060022107A KR 20060022107 A KR20060022107 A KR 20060022107A KR 20070092826 A KR20070092826 A KR 20070092826A
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South Korea
Prior art keywords
magnetic flux
permanent magnet
coil
stator
bldc motor
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KR1020060022107A
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Korean (ko)
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한만승
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주식회사 대우일렉트로닉스
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Priority to KR1020060022107A priority Critical patent/KR20070092826A/en
Publication of KR20070092826A publication Critical patent/KR20070092826A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
    • 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
    • H02K1/2793—Rotors axially facing stators
    • 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
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • 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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator

Abstract

A flat type BLDC(Blushless DC) motor is provided to transfer a magnetic flux to a permanent magnet uniformly by forming magnetic flux dispersing grooves on a magnetic flux concentrating plate at regular intervals to arrange magnetic flux transferring protrusions at regular intervals. A flat type BLDC motor includes a rotor(110), and a stator(120). The rotor(110) has a permanent magnet(111) at one side, and is rotatably installed. The stator(120) is vertically formed to face the permanent magnet(111) and has a plurality of stator cores(122) wound by a coil(128) along a circumference. The stator core(122) has an expanded area at an end of a coil winding unit(123) around which the coil(128) is wound, a magnetic flux concentrating plate(124) which faces the permanent magnet(111) with a gap, and magnetic flux dispersing grooves(125) to disperse a magnetic flux transferred from the coil(128) to the permanent magnet(111) on the magnetic flux concentrating plate(124).

Description

평편형 ＢＬＤＣ 모터{PAN-CAKE TYPE BRUSHLESS DC MOTOR}PAN-CAKE TYPE BRUSHLESS DC MOTOR

도 1은 종래의 기술에 따른 평편형 BLDC 모터를 도시한 분해사시도이고,1 is an exploded perspective view showing a flat BLDC motor according to the prior art,

도 2는 본 발명에 따른 평편형 BLDC 모터를 도시한 분해사시도이고,2 is an exploded perspective view showing a flat BLDC motor according to the present invention,

도 3은 본 발명에 따른 평편형 BLDC 모터의 자속집중판을 도시한 평면도이다.3 is a plan view illustrating a flux concentration plate of a flat BLDC motor according to the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

110 : 로터 111 : 영구자석110: rotor 111: permanent magnet

112 : 커버 113 : 샤프트112: cover 113: shaft

120 : 로터 121 : 스테이터플레이트120: rotor 121: stator plate

122 : 스테이터코어 123 : 코일권선부122: stator core 123: coil winding part

124 : 자속집중판 125 : 자속분산홈124: magnetic flux concentration plate 125: magnetic flux dispersion groove

126 : 자속전달돌기 127 : 인슐레이터126: magnetic flux delivery process 127: insulator

128 : 코일 130 : 제어기판128: coil 130: control board

131 : 관통홀 132 : 자극검출소자131: through hole 132: magnetic pole detection element

본 발명은 평편형 BLDC 모터에 관한 것으로서, 보다 상세하게는 코일로부터 발생된 자속이 영구자석에 균일하게 미치도록 하여 토오크 리플을 감소시키는 평편형 BLDC 모터에 관한 것이다.The present invention relates to a flat BLDC motor, and more particularly, to a flat BLDC motor that reduces the torque ripple by uniformly spreading the magnetic flux generated from the coil to the permanent magnet.

일반적으로, 모터라 함은 전기적 에너지를 기계적 에너지로 변환시켜서 회전력을 얻는 장치로서, 가정용 전자제품뿐만 아니라 산업용 기기 등에 광범위하게 사용되는데, 크게 DC 모터와 AC 모터로 나뉘어진다.In general, a motor is a device that obtains rotational force by converting electrical energy into mechanical energy, and is widely used in home appliances as well as industrial equipment, and is generally divided into a DC motor and an AC motor.

DC 모터에서 브러쉬(Brush)가 부착된 모터는 정류자와 브러쉬의 접촉에 의해서 코일에 전류를 흐르게 함과 동시에 전류시키는 기능을 하지만, 브러쉬가 마모되는 단점이 있다. 이러한 단점을 극복하기 위해 브러쉬를 사용하지 않는 BLDC(Brushless DC) 모터가 널리 사용되고 있다. In the DC motor, the brush (brush) is attached to the motor to flow a current at the same time as the current flows to the coil by the contact of the commutator and the brush, but the disadvantage is that the brush is worn. To overcome this drawback, brushless brushless DC (BLDC) motors are widely used.

BLDC 모터는 토크가 크고 제어성이 우수할 뿐만 아니라 신속성을 도모할 수 있기 때문에 근래 광범위하게 사용되고 있다.BLDC motors are widely used in recent years because of their high torque, excellent controllability, and fastness.

종래의 평편형 BLDC 모터를 첨부된 도면을 참조하여 설명하면 다음과 같다.Referring to the attached flat BLDC motor of the prior art as follows.

도 1은 종래의 기술에 따른 평편형 BLDC 모터를 도시한 분해사시도이다. 도시된 바와 같이, 종래의 기술에 따른 평편형 BLDC 모터(10)는 모터의 하우징(미도시)에 회전 가능하게 설치되는 샤프트(11)와, 샤프트(11)에 고정됨과 아울러 영구자석(12a)을 가지는 로터(12)와, 로터(12)의 하측에 설치되는 플레이트(13)와, 플레이트(13)의 상측면에 원주방향을 따라 일정 간격으로 영구자석(12a)과 마주 보도록 설치되는 복수의 코어(14)와, 코어(14)에 각각 권선되는 코일(15)과, 플레이트(13)의 하측에 고정되는 제어기판(16)을 포함한다.1 is an exploded perspective view showing a flat BLDC motor according to the prior art. As shown, the flat BLDC motor 10 according to the related art is a shaft 11 rotatably installed in a housing (not shown) of the motor, and is fixed to the shaft 11 and a permanent magnet 12a. Rotor 12 having a plurality of, the plate 13 is installed on the lower side of the rotor 12, a plurality of the upper surface of the plate 13 is provided to face the permanent magnet 12a at regular intervals along the circumferential direction A core 14, a coil 15 wound around the core 14, and a controller board 16 fixed to the lower side of the plate 13 are included.

샤프트(11)는 모터(10)의 하우징(미도시)에 베어링(11a)을 매개로 회전 가능하게 설치되고, 로터(12) 중심에 고정됨으로써 로터(12)와 함께 회전한다.The shaft 11 is rotatably installed in the housing (not shown) of the motor 10 via the bearing 11a, and is rotated together with the rotor 12 by being fixed to the center of the rotor 12.

로터(12)는 하측에 N극과 S극이 교대로 자화된 링형상의 영구자석(12a)이 설치된다.The rotor 12 is provided with a ring-shaped permanent magnet 12a in which the north pole and the south pole alternately magnetize.

플레이트(13)는 코어(14)와 함께 자성체로 이루어지고, 로터(12)의 하측에 위치하도록 모터(10)의 하우징(미도시)에 설치되며, 중심부에 샤프트(11)가 관통하는 관통홀(13d)이 형성되고, 상측면에 다수의 코어(14)가 삽입되어 설치되는 복수의 고정홀(13a)이 형성된다.The plate 13 is made of a magnetic material together with the core 14, and is installed in a housing (not shown) of the motor 10 so as to be positioned below the rotor 12, and a through hole through which the shaft 11 penetrates in the center thereof. 13d is formed, and a plurality of fixing holes 13a in which a plurality of cores 14 are inserted are provided in the upper side.

코어(14) 각각은 플레이트(13)의 고정홀(13a)에 삽입되어 고정되는데, 플레이트(13)의 고정홀(13a)에 삽입되어 수직되게 고정되는 몸체(14a)와, 몸체(14a)의 상단에 확대되는 면적을 가지도록 일체로 형성되는 자기장집중판(14b)을 포함하며, 몸체(14a)의 외주면에 코일(15)이 인슐레이터(17)를 매개로 권선된다. Each of the cores 14 is inserted into and fixed in the fixing hole 13a of the plate 13, and is inserted into the fixing hole 13a of the plate 13 to be fixed vertically and the body 14a of the body 14a. It includes a magnetic field concentrating plate (14b) formed integrally to have an area extending on the upper end, the coil 15 is wound on the outer peripheral surface of the body (14a) via the insulator (17).

제어기판(16)은 중심부에 샤프트(11)가 여유롭게 삽입되도록 관통홀(16a)이 형성되고, 플레이트(13) 하측에 부착되며, 코일(15)에 구동을 위한 전류를 인가하는 구동회로(미도시) 및 영구자석(12a)의 자극을 감지하는 홀센서(Hall sensor) 등의 자극검출소자(16b)가 설치되고, 구동시 토오크 발생을 위하여 코일(15) 각각에 전류를 인가시킨다.The control board 16 has a through hole 16a formed to allow the shaft 11 to be inserted into the center of the control board 16, attached to the lower side of the plate 13, and a driving circuit for applying a current for driving to the coil 15 (not shown). And a magnetic pole detecting element 16b such as a Hall sensor that senses magnetic poles of the permanent magnet 12a, and applies a current to each of the coils 15 to generate torque during driving.

이와 같은 종래의 기술에 따른 평편형 BLDC 모터(10)는 제어기판(16)의 구동회로에 의해 코어(14)에 권선된 코일(15)에 전류가 공급되어 생성된 자속이 코어(14)를 통하여 상측의 영구자석(12a)으로 전달됨으로써 로터(12)는 회전하며, 이 때, 제어기판(16)에 설치된 자극검출소자(16b)에 의해 검출된 영구자석(12a)의 자극에 대한 신호가 제어기판(16)의 구동회로로 전달되어 코일(15)이 다른 자성을 가지도록 코일(15)에 극성을 달리하는 전원을 공급하여 로터(12)의 계속적인 회전을 가능하도록 한다.The flat BLDC motor 10 according to the related art has a magnetic flux generated by supplying current to the coil 15 wound on the core 14 by a driving circuit of the control board 16. The rotor 12 is rotated by being transferred to the upper permanent magnet 12a through the above, and at this time, the signal for the magnetic pole of the permanent magnet 12a detected by the magnetic pole detecting element 16b installed in the control board 16 is transmitted. It is transmitted to the driving circuit of the control board 16 to supply the power of different polarity to the coil 15 so that the coil 15 has different magnetism to enable the continuous rotation of the rotor 12.

이러한 종래의 평편형 BLDC 모터(10)는 자속집중판(14b)에 의해서 코일(15)로부터 발생되는 자속이 영구자석(12a)에 미치는 범위를 확대시킴과 동시에 자속이 영구자석(12a)에 집중되도록 한다. 물론, 자속집중판(14b)에 의한 자속의 집중은 자속 손실을 최소화하여 모터의 출력 향상에 기여하나, 영구자석(12a)에 미치는 자속이 집중됨으로 인해 자속의 불균일을 초래하여 토오크 리플을 발생시키는 문제점을 가지고 있었다.The conventional flat BLDC motor 10 expands the range of the magnetic flux generated from the coil 15 by the magnetic flux concentrating plate 14b to the permanent magnet 12a and at the same time concentrates the magnetic flux on the permanent magnet 12a. Be sure to Of course, the concentration of the magnetic flux by the magnetic flux concentration plate 14b contributes to the improvement of the output of the motor by minimizing the magnetic flux loss, but due to the concentration of the magnetic flux on the permanent magnet 12a, the magnetic flux is uneven and causes torque ripple. Had a problem.

본 발명은 상술한 종래의 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 자속집중판에 자속의 분산을 위한 홈을 형성시킴으로써 코일로부터 발생된 자속이 영구자석에 균일하게 미치도록 하여 토오크 리플을 감소시키는 평편형 BLDC 모터를 제공하는데 있다.The present invention is to solve the above-mentioned problems, the object of the present invention is to form a groove for dispersing the magnetic flux in the magnetic flux concentration plate to reduce the torque ripple by uniformly spreading the magnetic flux generated from the coil to the permanent magnet To provide a flat BLDC motor.

이와 같은 목적을 실현하기 위한 본 발명은, 일측에 영구자석이 고정됨과 아울러 회전 가능하게 설치되는 로터와, 영구자석을 향하도록 수직되게 형성됨과 아울러 코일이 권선되는 스테이터코어가 원주방향을 따라 다수 마련되는 스테이터를 포함하는 평편형 BLDC 모터에 있어서, 스테이터코어는 코일이 권선되는 코일권선부의 끝단에 확대된 면적을 가짐과 아울러 영구자석과 공극을 두고 마주 대하는 자속 집중판이 마련되고, 자속집중판상에 코일로부터 발생되어 영구자석으로 전달되는 자속을 분산시키도록 자속분산홈이 형성되며, 연자성 분말의 압축에 의해 형성되는 것을 특징으로 한다.The present invention for realizing the above object, the permanent magnet is fixed to one side, and the rotor is rotatably installed, and a plurality of stator cores are formed along the circumferential direction and are formed vertically to face the permanent magnet. In the flat BLDC motor including the stator, the stator core has an enlarged area at the end of the coil winding portion to which the coil is wound, and is provided with a magnetic flux concentrator facing the permanent magnets and voids, and a coil on the magnetic flux concentrating plate. Magnetic flux dispersion grooves are formed to disperse the magnetic flux generated from and transmitted to the permanent magnet, characterized in that formed by the compression of the soft magnetic powder.

이하, 본 발명의 가장 바람직한 실시예를 첨부한 도면을 참조하여 본 발명의 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 더욱 상세히 설명하기로 한다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

도 2는 본 발명에 따른 평편형 BLDC 모터를 도시한 분해사시도이고, 도 3은 본 발명에 따른 평편형 BLDC 모터의 자속집중판을 도시한 평면도이다. 도시된 바와 같이, 본 발명에 따른 평편형 BLDC 모터(100)는 일측에 영구자석(111)이 고정됨과 아울러 회전 가능하게 설치되는 로터(110)와, 영구자석(111)을 향하도록 수직되게 형성됨과 아울러 자속분산홈(125)이 형성된 자속집중판(124)을 가지는 스테이터코어(122)가 원주방향을 따라 다수로 마련되는 연자성 복합체의 스테이터(120)를 포함한다.2 is an exploded perspective view showing a flat BLDC motor according to the present invention, Figure 3 is a plan view showing a magnetic flux concentration plate of the flat BLDC motor according to the present invention. As shown, the flat BLDC motor 100 according to the present invention is vertically formed so as to face the rotor 110 and the permanent magnet 111 is rotatably installed as well as the permanent magnet 111 is fixed to one side. In addition, the stator core 122 having the magnetic flux concentrating plate 124 on which the magnetic flux dispersing grooves 125 are formed includes a stator 120 of the soft magnetic composite provided in plural along the circumferential direction.

로터(110)는 커버(112)의 중심에 샤프트(113)가 수직되게 관통하여 고정되고, 샤프트(113)가 모터의 하우징(미도시) 상측과 하측에 베어링(113a)을 매개로 설치됨으로써 회전 가능하게 설치되며, 커버(112) 하측에 마련되는 브라켓(112a)에 영구자석(111)이 고정된다.The rotor 110 is fixed by vertically penetrating the shaft 113 in the center of the cover 112, the shaft 113 is rotated by installing the bearing 113a on the upper and lower sides of the housing (not shown) of the motor. It is installed to be possible, the permanent magnet 111 is fixed to the bracket (112a) provided under the cover (112).

영구자석(111)은 N극과 S극이 교대로 자화된 원형링 형상을 가진다.The permanent magnet 111 has a circular ring shape in which the N pole and the S pole are alternately magnetized.

스테이터(120)는 자성체인 스테이터플레이트(121)가 영구자석(111)의 하측에 위치하도록 모터의 하우징(미도시)내에 설치되고, 스테이터플레이트(121)의 중심에 샤프트(113)가 여유롭게 관통하도록 관통홀(121b)이 형성되며, 스테이터플레이트(121)상에 원주방향을 따라 형성되는 다수의 고정홀(121a)에 스테이터코어(122)가 각각 설치된다.The stator 120 is installed in a housing (not shown) of the motor such that the stator plate 121, which is a magnetic body, is positioned under the permanent magnet 111, and the shaft 113 penetrates easily in the center of the stator plate 121. The through holes 121b are formed, and the stator cores 122 are respectively installed in the plurality of fixing holes 121a formed in the circumferential direction on the stator plate 121.

스테이터플레이트(121) 하측에 제어기판(130)이 고정되는데, 제어기판(130)은 중심부에 샤프트(113)가 여유롭게 삽입되도록 관통홀(131)이 형성되며, 코일(128)에 구동을 위한 전류를 인가하는 구동회로(미도시)가 형성됨과 아울러 영구자석(111)의 자극을 감지하는 홀센서(Hall sensor) 등과 같은 자극검출소자(132)가 설치되고, 구동시 토오크 발생을 위하여 코일(128) 각각에 전류를 인가시킨다.The control plate 130 is fixed to the lower side of the stator plate 121. The control plate 130 has a through hole 131 formed therein so as to allow the shaft 113 to be easily inserted in the center thereof, and a current for driving the coil 128. A driving circuit (not shown) for applying a pressure is formed and a magnetic pole detecting element 132 such as a Hall sensor for detecting magnetic poles of the permanent magnet 111 is installed, and a coil 128 for generating torque during driving. ) Apply current to each.

스테이터코어(122)는 2의 배수로 이루어지며, 각각은 스테이터코어(122)의 고정홀(121a)에 삽입되는 고정되는 코일권선부(123)와, 코일권선부(123)의 끝단, 즉 상단에 형성되는 자속집중판(124)을 포함한다.The stator core 122 is composed of multiples of two, each of which is fixed to the coil winding part 123 inserted into the fixing hole 121a of the stator core 122 and the end of the coil winding part 123, that is, the upper end. The magnetic flux concentration plate 124 is formed.

코일권선부(123)는 수직되게 형성되며, 외측에 코일(128)이 권선되는 인슐레이터(127)가 끼워진다.The coil winding 123 is vertically formed, and an insulator 127 around which the coil 128 is wound is fitted to the outside.

자속집중판(124)은 코일권선부(123)의 단면적보다 큰 확대된 면적을 가짐과 아울러 영구자석(111)과 공극을 두고 마주 대하며, 상측면에 자속분산홈(125)이 형성된다.The magnetic flux concentrating plate 124 has an enlarged area larger than the cross-sectional area of the coil winding 123 and faces the permanent magnet 111 with a space therebetween, and a magnetic flux dispersing groove 125 is formed on the upper side thereof.

자속분산홈(125)은 자속집중판(124)상에 형성되어 영구자석(111)과의 사이가 늘어남으로써 코일(128)로부터 발생되는 자속이 자속분산홈(125)에 대하여 상대적으로 돌출됨과 아울러 구획되는 자속전달돌기(126)측을 따라 영구자석(111)으로 전 달됨으로써 분산되며, 이로 인해 영구자석(111)에 미치는 자속의 부분집중을 억제하여 균일화를 도모한다.The magnetic flux dispersing groove 125 is formed on the magnetic flux concentrating plate 124 so that the magnetic flux generated from the coil 128 is protruded relative to the magnetic flux dispersing groove 125 as the gap between the permanent magnets 111 increases. It is distributed by being transferred to the permanent magnets 111 along the side of the flux transfer protrusion 126 partitioned, thereby suppressing partial concentration of the magnetic fluxes on the permanent magnets 111 to achieve uniformity.

자속분산홈(125)은 도 3에 도시된 바와 같이, 영구자석(111)의 회전반경 방향을 따라 형성되며, 자속집중판(124)마다 일정간격을 두고서 복수로 형성됨으로써 자속전달돌기(126)가 일정간격으로 배열되도록 형성되어 영구자석(111)에 미치는 자속이 보다 균일하도록 한다.As shown in FIG. 3, the magnetic flux dispersing grooves 125 are formed along the rotation radius direction of the permanent magnets 111, and are formed in plural at regular intervals for each of the magnetic flux concentration plates 124. Are formed to be arranged at regular intervals so that the magnetic flux on the permanent magnet 111 is more uniform.

스테이터코어(122)는 "T"자 형상을 가짐과 아울러 자속분산홈(125) 등을 형성시키기 위하여 연자성 분말의 압축에 의해 형성된다. The stator core 122 has a "T" shape and is formed by the compression of the soft magnetic powder to form the magnetic flux dispersing groove 125 and the like.

스테이터코어(122)가 연자성 분말로 압축 제작되기 위하여 압축성형기에 스테이터코어(122)와 상응하는 형상을 포함하는 성형공간을 마련하고, 성형공간에 연자성 분말을 채운 다음 펀치 등과 같은 압축부재로 압축시켜서 코일권선부(123)와 자속집중판(124)이 일체를 이룸과 아울러 자속집중판(124)에 자속분산홈(125)이 형성되는 스테이터코어(122)가 제작된다. 이 때, 연자성 분말에 윤활제 및/또는 결합제를 함유하여 함께 압축시킬 수 있다.In order to compress and manufacture the stator core 122 into soft magnetic powder, a compression molding machine is provided with a molding space including a shape corresponding to the stator core 122, a soft magnetic powder is filled into the molding space, and then compressed into a compression member such as a punch. By compressing, the coil winding unit 123 and the magnetic flux concentrating plate 124 are integrally formed, and a stator core 122 is formed in which the magnetic flux dispersing grooves 125 are formed in the magnetic flux concentrating plate 124. At this time, the soft magnetic powder may contain a lubricant and / or a binder and may be compressed together.

스테이터코어(122)는 연자성 분말의 압축 프로세스에 의해 3차원 형상을 가지는 연자성 복합체(soft magnetic composite; "SMC"라고도 함)가 되며, 규소 강판을 이용하는 종래의 경우보다 높은 자유도(degree of freedom)가 허용됨으로써 종래에 동일 형상만의 규소 강판 적층 구조와 달리 복잡한 형상을 가지는 스테이터코어(122)의 제작을 가능하도록 한다.The stator core 122 is a soft magnetic composite (also referred to as "SMC") having a three-dimensional shape by a soft magnetic powder compression process, and has a higher degree of freedom than the conventional case using silicon steel sheets. By allowing freedom, it is possible to manufacture a stator core 122 having a complicated shape, unlike a silicon steel sheet laminated structure having the same shape in the related art.

한편, 스테이터플레이트(121)는 규소 강판의 다수 적층에 의해 형성될 수 있 으며, 스테이터코어(122)와 마찬가지로 연자성 분말의 압축에 의해 형성된다.On the other hand, the stator plate 121 may be formed by stacking a large number of silicon steel sheets, and similarly to the stator core 122 is formed by the compression of the soft magnetic powder.

이와 같은 구조로 이루어진 평편형 BLDC 모터의 동작은 다음과 같이 이루어진다.The operation of the flat BLDC motor having such a structure is performed as follows.

구동을 위해서 동작신호가 가해지면, 제어기판(130)의 구동회로에 의해 스테이터코어(122)에 권선된 코일(128)에 전류가 공급되어 자속을 형성시킨다. 이 때, 코일(128)로부터 발생된 자속은 자성체인 스테이터코어(122)의 자속집중판(124)을 통하여 영구자석(111)으로 전달되며, 이로 인해 로터(110)는 회전하게 된다.When an operation signal is applied for driving, a current is supplied to the coil 128 wound on the stator core 122 by the driving circuit of the controller board 130 to form magnetic flux. At this time, the magnetic flux generated from the coil 128 is transmitted to the permanent magnet 111 through the magnetic flux concentrating plate 124 of the stator core 122, which is a magnetic body, thereby causing the rotor 110 to rotate.

한편, 제어기판(130)상의 자극검출소자(132)에 의해 검출된 영구자석(111)의 자극에 대한 신호가 제어기판(130)의 구동회로로 전달되어 코일(128)이 다른 자성을 가지도록 코일(128)에 극성을 달리하는 전원을 공급함으로써 로터(110)의 계속적인 회전을 가능하도록 한다.On the other hand, the signal for the magnetic pole of the permanent magnet 111 detected by the magnetic pole detection element 132 on the control board 130 is transmitted to the drive circuit of the control board 130 so that the coil 128 has a different magnetic Supplying power of different polarity to the coil 128 allows for continuous rotation of the rotor 110.

또한, 자속분산홈(125)은 영구자석(111)과의 공극을 증가시켜서 코일(128)로부터 발생된 자속이 상대적으로 돌출되어 영구자석(111)에 근접함과 아울러 나뉘어지는 다수의 자속전달돌기(126)를 통해서 영구자석(111)으로 전달됨으로써 분산되며, 영구자석(111)에 미치는 자속의 부분 집중을 해소하여 자속의 균일화를 도모함으로써 토오크 리플을 감소시킨다.In addition, the magnetic flux dispersion groove 125 increases the gap with the permanent magnets 111 so that the magnetic flux generated from the coil 128 is relatively protruded to be close to the permanent magnets 111 and divided into a plurality of magnetic flux transfer protrusions. Dispersed by being transmitted to the permanent magnet 111 through 126, the torque ripple is reduced by eliminating partial concentration of the magnetic flux on the permanent magnet 111 to achieve the uniformity of the magnetic flux.

그리고, 자속분산홈(125)은 도 3에 도시된 바와 같이, 영구자석(111)의 회전반경 방향을 따라 형성됨으로써 자속전달돌기(126)를 영구자석(111)의 회전반경 방향으로 분할시키게 되며, 이러한 자속분산홈(125)이 자속집중판(124)마다 일정간격을 두고서 복수로 형성됨으로써 자속전달돌기(126)가 일정간격으로 배열되도록 하 여 영구자석(111)에 미치는 자속이 균일화를 향상시키며, 이로 인해 토오크 리플의 감소에 크게 기여한다.And, as shown in Figure 3, the magnetic flux dispersion groove 125 is formed along the rotation radius direction of the permanent magnets 111 to divide the magnetic flux delivery projections 126 in the rotation radius direction of the permanent magnets 111. Since the magnetic flux distribution grooves 125 are formed in plural at regular intervals for each of the magnetic flux concentration plates 124, the magnetic flux delivery protrusions 126 are arranged at regular intervals, thereby improving uniformity of the magnetic flux on the permanent magnets 111. This greatly contributes to the reduction of torque ripple.

상술한 바와 같이, 본 발명에 평편형 BLDC 모터는 자속집중판에 자속의 분산을 위한 홈을 형성시킴으로써 코일로부터 발생된 자속이 영구자석에 균일하게 미치도록 하여 토오크 리플을 감소시키는 효과를 가지고 있다.As described above, the flat BLDC motor in the present invention has the effect of reducing the torque ripple by making the magnetic flux generated from the coil evenly spread over the permanent magnet by forming a groove for dispersing the magnetic flux in the magnetic flux concentration plate.

이상에서 설명한 것은 본 발명에 따른 평편형 BLDC 모터를 실시하기 위한 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다.What has been described above is merely an embodiment for implementing a flat BLDC motor according to the present invention, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims deviates from the gist of the present invention. Without this, anyone skilled in the art to which the present invention pertains will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (3)

일측에 영구자석이 고정됨과 아울러 회전 가능하게 설치되는 로터와, 상기 영구자석을 향하도록 수직되게 형성됨과 아울러 코일이 권선되는 스테이터코어가 원주방향을 따라 다수 마련되는 스테이터를 포함하는 평편형 BLDC 모터에 있어서,In a flat BLDC motor including a rotor fixed to one side and rotatably installed, and a stator formed vertically to face the permanent magnet, and a stator core to which coils are wound in a circumferential direction. In 상기 스테이터코어는 상기 코일이 권선되는 코일권선부의 끝단에 확대된 면적을 가짐과 아울러 상기 영구자석과 공극을 두고 마주 대하는 자속집중판이 마련되고, 상기 자속집중판상에 상기 코일로부터 발생되어 상기 영구자석으로 전달되는 자속을 분산시키도록 자속분산홈이 형성되며, 연자성 분말의 압축에 의해 형성되는 것The stator core has an enlarged area at the end of the coil winding portion to which the coil is wound, and is provided with a magnetic flux concentrating plate facing the permanent magnet with a gap, and is generated from the coil on the magnetic flux concentrating plate to the permanent magnet. Magnetic flux dispersion grooves are formed to disperse the transmitted magnetic flux, and formed by the compression of the soft magnetic powder 을 특징으로 하는 평편형 BLDC 모터.Flat BLDC motor, characterized in that. 제 1 항에 있어서,The method of claim 1, 상기 자속분산홈은,The magnetic flux dispersion groove, 상기 영구자석의 회전반경 방향을 따라 형성되는 것It is formed along the rotation radius direction of the permanent magnet 을 특징으로 하는 평편형 BLDC 모터.Flat BLDC motor, characterized in that. 제 2 항에 있어서,The method of claim 2, 상기 자속분산홈은,The magnetic flux dispersion groove, 자속집중판마다 일정간격을 두고서 복수로 형성되는 것Formed of a plurality of magnetic flux concentration plates at regular intervals 을 특징으로 하는 평편형 BLDC 모터.Flat BLDC motor, characterized in that.
KR1020060022107A 2006-03-09 2006-03-09 Pan-cake type brushless dc motor KR20070092826A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8508096B2 (en) 2010-05-11 2013-08-13 Samsung Electro-Mechanics Co., Ltd. Stator core and spindle motor having the same
EP4142125A1 (en) * 2021-08-26 2023-03-01 Universidad de Alcalá (UAH) Miniaturized electromagnetic rotary actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8508096B2 (en) 2010-05-11 2013-08-13 Samsung Electro-Mechanics Co., Ltd. Stator core and spindle motor having the same
EP4142125A1 (en) * 2021-08-26 2023-03-01 Universidad de Alcalá (UAH) Miniaturized electromagnetic rotary actuator
WO2023025939A1 (en) 2021-08-26 2023-03-02 Universidad De Alcala (Uah) Miniaturized wirelessly powered electromagnetic rotary actuator

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